Updates version and improves diagram styling

Bumps application version to 0.3.0 for new features or fixes.
Enhances README diagram styling for better readability in both
light and dark GitHub themes by adjusting colors and adding
text color contrast.

.github/workflows/autofix.yml

@@ -0,0 +1,25 @@
+name: autofix.ci
+on:
+  pull_request:
+  push:
+    branches: [ "master" ]
+permissions:
+  contents: read
+
+jobs:
+  autofix:
+    runs-on: ubuntu-latest
+    steps:
+      - uses: actions/checkout@v4
+      - uses: actions/setup-go@v5
+        with:
+          go-version-file: 'go.mod'
+
+      # goimports works like gofmt, but also fixes imports.
+      # see https://pkg.go.dev/golang.org/x/tools/cmd/goimports
+      - run: go install golang.org/x/tools/cmd/goimports@latest
+      - run: goimports -w .
+      # of course we can also do just this instead:
+      # - run: gofmt -w .
+
+      - uses: autofix-ci/action@551dded8c6cc8a1054039c8bc0b8b48c51dfc6ef

.github/workflows/ci.yml

@@ -16,7 +16,11 @@ jobs:
       contents: write
     strategy:
       matrix:
-        go: [1.21.x, 1.22.x, 1.23.x, 1.24.x]
+        go:
+          - 1.21.x
+          - 1.22.x
+          - 1.23.x
+          - 1.24.x
 
     steps:
       - uses: actions/checkout@v4
@@ -37,20 +41,171 @@ jobs:
       - name: Build
         run: go build -v ./...
 
-      - name: Run tests
-        run: go test -v -race -coverprofile=coverage.out ./...
+      - name: Run tests with enhanced reporting
+        id: test
+        run: |
+          echo "## 🔧 Test Environment" >> $GITHUB_STEP_SUMMARY
+          echo "- **Go Version:** ${{ matrix.go }}" >> $GITHUB_STEP_SUMMARY
+          echo "- **OS:** ubuntu-latest" >> $GITHUB_STEP_SUMMARY
+          echo "- **Timestamp:** $(date -u)" >> $GITHUB_STEP_SUMMARY
+          echo "" >> $GITHUB_STEP_SUMMARY
+          
+          echo "Running tests with coverage..."
+          go test -v -race -coverprofile=coverage.out ./... 2>&1 | tee test-output.log
+          
+          # Extract test results for summary
+          TEST_STATUS=$?
+          TOTAL_TESTS=$(grep -c "=== RUN" test-output.log || echo "0")
+          PASSED_TESTS=$(grep -c "--- PASS:" test-output.log || echo "0")
+          FAILED_TESTS=$(grep -c "--- FAIL:" test-output.log || echo "0")
+          SKIPPED_TESTS=$(grep -c "--- SKIP:" test-output.log || echo "0")
+          
+          # Generate test summary
+          echo "## 🧪 Test Results (Go ${{ matrix.go }})" >> $GITHUB_STEP_SUMMARY
+          echo "" >> $GITHUB_STEP_SUMMARY
+          echo "| Metric | Value |" >> $GITHUB_STEP_SUMMARY
+          echo "|--------|-------|" >> $GITHUB_STEP_SUMMARY
+          echo "| Total Tests | $TOTAL_TESTS |" >> $GITHUB_STEP_SUMMARY
+          echo "| Passed | ✅ $PASSED_TESTS |" >> $GITHUB_STEP_SUMMARY
+          echo "| Failed | ❌ $FAILED_TESTS |" >> $GITHUB_STEP_SUMMARY
+          echo "| Skipped | ⏭️ $SKIPPED_TESTS |" >> $GITHUB_STEP_SUMMARY
+          echo "| Status | $([ $TEST_STATUS -eq 0 ] && echo "✅ PASSED" || echo "❌ FAILED") |" >> $GITHUB_STEP_SUMMARY
+          echo "" >> $GITHUB_STEP_SUMMARY
+          
+          # Add package breakdown
+          echo "### 📦 Package Test Results" >> $GITHUB_STEP_SUMMARY
+          echo "" >> $GITHUB_STEP_SUMMARY
+          echo "| Package | Status |" >> $GITHUB_STEP_SUMMARY
+          echo "|---------|--------|" >> $GITHUB_STEP_SUMMARY
+          
+          # Extract package results
+          grep "^ok\|^FAIL" test-output.log | while read line; do
+            if [[ $line == ok* ]]; then
+              pkg=$(echo $line | awk '{print $2}')
+              echo "| $pkg | ✅ PASS |" >> $GITHUB_STEP_SUMMARY
+            elif [[ $line == FAIL* ]]; then
+              pkg=$(echo $line | awk '{print $2}')
+              echo "| $pkg | ❌ FAIL |" >> $GITHUB_STEP_SUMMARY
+            fi
+          done
+          
+          echo "" >> $GITHUB_STEP_SUMMARY
+          
+          # Add detailed results if tests failed
+          if [ $TEST_STATUS -ne 0 ]; then
+            echo "### ❌ Failed Tests Details" >> $GITHUB_STEP_SUMMARY
+            echo "" >> $GITHUB_STEP_SUMMARY
+            echo "\`\`\`" >> $GITHUB_STEP_SUMMARY
+            grep -A 10 "--- FAIL:" test-output.log | head -100 >> $GITHUB_STEP_SUMMARY
+            echo "\`\`\`" >> $GITHUB_STEP_SUMMARY
+            echo "" >> $GITHUB_STEP_SUMMARY
+          fi
+          
+          # Set outputs for other steps
+          echo "test-status=$TEST_STATUS" >> $GITHUB_OUTPUT
+          echo "total-tests=$TOTAL_TESTS" >> $GITHUB_OUTPUT
+          echo "passed-tests=$PASSED_TESTS" >> $GITHUB_OUTPUT
+          echo "failed-tests=$FAILED_TESTS" >> $GITHUB_OUTPUT
+          
+          # Exit with the original test status
+          exit $TEST_STATUS
+
+      - name: Generate coverage report
+        if: always()
+        run: |
+          if [ -f coverage.out ]; then
+            go tool cover -html=coverage.out -o coverage.html
+            COVERAGE=$(go tool cover -func=coverage.out | grep total | awk '{print $3}')
+            
+            echo "## 📊 Code Coverage (Go ${{ matrix.go }})" >> $GITHUB_STEP_SUMMARY
+            echo "" >> $GITHUB_STEP_SUMMARY
+            echo "**Total Coverage: $COVERAGE**" >> $GITHUB_STEP_SUMMARY
+            echo "" >> $GITHUB_STEP_SUMMARY
+            
+            # Add coverage by package
+            echo "### 📋 Coverage by Package" >> $GITHUB_STEP_SUMMARY
+            echo "" >> $GITHUB_STEP_SUMMARY
+            echo "| Package | Coverage |" >> $GITHUB_STEP_SUMMARY
+            echo "|---------|----------|" >> $GITHUB_STEP_SUMMARY
+            
+            go tool cover -func=coverage.out | grep -v total | while read line; do
+              if [[ $line == *".go:"* ]]; then
+                pkg=$(echo $line | awk '{print $1}' | cut -d'/' -f1-3)
+                coverage=$(echo $line | awk '{print $3}')
+                echo "| $pkg | $coverage |" >> $GITHUB_STEP_SUMMARY
+              fi
+            done | sort -u
+            
+            echo "" >> $GITHUB_STEP_SUMMARY
+          else
+            echo "## ⚠️ Coverage Report" >> $GITHUB_STEP_SUMMARY
+            echo "No coverage file generated" >> $GITHUB_STEP_SUMMARY
+            echo "" >> $GITHUB_STEP_SUMMARY
+          fi
+
+      - name: Upload test artifacts
+        if: failure()
+        uses: actions/upload-artifact@v4
+        with:
+          name: test-results-go-${{ matrix.go }}
+          path: |
+            test-output.log
+            coverage.out
+            coverage.html
+          retention-days: 7
 
       - name: Run go vet
-        run: go vet ./...
+        run: |
+          echo "## 🔍 Static Analysis (Go ${{ matrix.go }})" >> $GITHUB_STEP_SUMMARY
+          echo "" >> $GITHUB_STEP_SUMMARY
+          
+          VET_OUTPUT=$(go vet ./... 2>&1 || echo "")
+          VET_STATUS=$?
+          
+          if [ $VET_STATUS -eq 0 ]; then
+            echo "✅ **go vet:** No issues found" >> $GITHUB_STEP_SUMMARY
+          else
+            echo "❌ **go vet:** Issues found" >> $GITHUB_STEP_SUMMARY
+            echo "" >> $GITHUB_STEP_SUMMARY
+            echo "\`\`\`" >> $GITHUB_STEP_SUMMARY
+            echo "$VET_OUTPUT" >> $GITHUB_STEP_SUMMARY
+            echo "\`\`\`" >> $GITHUB_STEP_SUMMARY
+          fi
+          echo "" >> $GITHUB_STEP_SUMMARY
+          
+          exit $VET_STATUS
 
       - name: Run go fmt
         run: |
-          if [ "$(gofmt -s -l . | wc -l)" -gt 0 ]; then
-            echo "The following files are not formatted:"
-            gofmt -s -l .
+          FMT_OUTPUT=$(gofmt -s -l . 2>&1 || echo "")
+          
+          if [ -z "$FMT_OUTPUT" ]; then
+            echo "✅ **go fmt:** All files properly formatted" >> $GITHUB_STEP_SUMMARY
+          else
+            echo "❌ **go fmt:** Files need formatting" >> $GITHUB_STEP_SUMMARY
+            echo "" >> $GITHUB_STEP_SUMMARY
+            echo "\`\`\`" >> $GITHUB_STEP_SUMMARY
+            echo "$FMT_OUTPUT" >> $GITHUB_STEP_SUMMARY
+            echo "\`\`\`" >> $GITHUB_STEP_SUMMARY
+            echo "" >> $GITHUB_STEP_SUMMARY
             exit 1
           fi
 
+      - name: Job Summary
+        if: always()
+        run: |
+          echo "## 📋 Job Summary (Go ${{ matrix.go }})" >> $GITHUB_STEP_SUMMARY
+          echo "" >> $GITHUB_STEP_SUMMARY
+          echo "| Step | Status |" >> $GITHUB_STEP_SUMMARY
+          echo "|------|--------|" >> $GITHUB_STEP_SUMMARY
+          echo "| Dependencies | ✅ Success |" >> $GITHUB_STEP_SUMMARY
+          echo "| Build | ✅ Success |" >> $GITHUB_STEP_SUMMARY
+          echo "| Tests | ${{ steps.test.outcome == 'success' && '✅ Success' || '❌ Failed' }} |" >> $GITHUB_STEP_SUMMARY
+          echo "| Coverage | ${{ job.status == 'success' && '✅ Generated' || '⚠️ Partial' }} |" >> $GITHUB_STEP_SUMMARY
+          echo "| Static Analysis | ${{ job.status == 'success' && '✅ Clean' || '❌ Issues' }} |" >> $GITHUB_STEP_SUMMARY
+          echo "| Code Formatting | ${{ job.status == 'success' && '✅ Clean' || '❌ Issues' }} |" >> $GITHUB_STEP_SUMMARY
+          echo "" >> $GITHUB_STEP_SUMMARY
+
       - name: Upload coverage reports to Codecov
         uses: codecov/codecov-action@v5
         with:
@@ -81,9 +236,6 @@ jobs:
           fail-on-severity: moderate
           comment-summary-in-pr: always
 
-          # # Use comma-separated names to pass list arguments:
-          # deny-licenses: LGPL-2.0, BSD-2-Clause
-
   release:
     name: Release
     runs-on: ubuntu-latest
@@ -103,10 +255,37 @@ jobs:
           check-latest: true
 
       - name: Run tests
-        run: go test -v ./...
+        run: |
+          echo "## 🚀 Release Tests" >> $GITHUB_STEP_SUMMARY
+          echo "" >> $GITHUB_STEP_SUMMARY
+          
+          go test -v ./... 2>&1 | tee release-test-output.log
+          TEST_STATUS=$?
+          
+          TOTAL_TESTS=$(grep -c "=== RUN" release-test-output.log || echo "0")
+          PASSED_TESTS=$(grep -c "--- PASS:" release-test-output.log || echo "0")
+          FAILED_TESTS=$(grep -c "--- FAIL:" release-test-output.log || echo "0")
+          
+          echo "| Metric | Value |" >> $GITHUB_STEP_SUMMARY
+          echo "|--------|-------|" >> $GITHUB_STEP_SUMMARY
+          echo "| Total Tests | $TOTAL_TESTS |" >> $GITHUB_STEP_SUMMARY
+          echo "| Passed | ✅ $PASSED_TESTS |" >> $GITHUB_STEP_SUMMARY
+          echo "| Failed | ❌ $FAILED_TESTS |" >> $GITHUB_STEP_SUMMARY
+          echo "| Status | $([ $TEST_STATUS -eq 0 ] && echo "✅ PASSED" || echo "❌ FAILED") |" >> $GITHUB_STEP_SUMMARY
+          echo "" >> $GITHUB_STEP_SUMMARY
+          
+          exit $TEST_STATUS
+
+      - name: Install UPX
+        run: |
+          sudo apt-get update
+          sudo apt-get install -y upx
 
       - name: Build binaries
         run: |
+          echo "## 🔨 Build Process" >> $GITHUB_STEP_SUMMARY
+          echo "" >> $GITHUB_STEP_SUMMARY
+          
           # Set the build time environment variable
           BUILD_TIME=$(date -u +'%Y-%m-%dT%H:%M:%SZ')
 
@@ -116,17 +295,54 @@ jobs:
           # Display help information for the build script
           ./scripts/build.sh --help
 
+          echo "**Build Configuration:**" >> $GITHUB_STEP_SUMMARY
+          echo "- Version: ${{ github.ref_name }}" >> $GITHUB_STEP_SUMMARY
+          echo "- Build Time: $BUILD_TIME" >> $GITHUB_STEP_SUMMARY
+          echo "- Git Commit: ${{ github.sha }}" >> $GITHUB_STEP_SUMMARY
+          echo "" >> $GITHUB_STEP_SUMMARY
+
           # Build for all platforms
           ./scripts/build.sh \
             --verbose \
             -ldflags "-s -w -X github.com/kjanat/articulate-parser/internal/version.Version=${{ github.ref_name }} -X github.com/kjanat/articulate-parser/internal/version.BuildTime=$BUILD_TIME -X github.com/kjanat/articulate-parser/internal/version.GitCommit=${{ github.sha }}"
 
+      - name: Compress binaries with UPX
+        run: |
+          echo "## 📦 Binary Compression" >> $GITHUB_STEP_SUMMARY
+          echo "" >> $GITHUB_STEP_SUMMARY
+          
+          echo "Compressing binaries with UPX..."
+          cd build/
+          
+          # Get original sizes
+          echo "**Original sizes:**" >> $GITHUB_STEP_SUMMARY
+          echo "\`\`\`" >> $GITHUB_STEP_SUMMARY
+          ls -lah >> $GITHUB_STEP_SUMMARY
+          echo "\`\`\`" >> $GITHUB_STEP_SUMMARY
+          echo "" >> $GITHUB_STEP_SUMMARY
+          
+          # Compress all binaries except Darwin (macOS) binaries as UPX doesn't work well with recent macOS versions
+          for binary in articulate-parser-*; do
+            if [[ "$binary" == *"darwin"* ]]; then
+              echo "Skipping UPX compression for $binary (macOS compatibility)"
+            else
+              echo "Compressing $binary..."
+              upx --best --lzma "$binary" || {
+                echo "Warning: UPX compression failed for $binary, keeping original"
+              }
+            fi
+          done
+          
+          echo "**Final sizes:**" >> $GITHUB_STEP_SUMMARY
+          echo "\`\`\`" >> $GITHUB_STEP_SUMMARY
+          ls -lah >> $GITHUB_STEP_SUMMARY
+          echo "\`\`\`" >> $GITHUB_STEP_SUMMARY
+          echo "" >> $GITHUB_STEP_SUMMARY
+
       - name: Upload a Build Artifact
         uses: actions/upload-artifact@v4.6.2
         with:
-          # Artifact name
-          name: build-artifacts # optional, default is artifact
-          # A file, directory or wildcard pattern that describes what to upload
+          name: build-artifacts
           path: build/
           if-no-files-found: ignore
           retention-days: 1

.gitignore

@@ -26,11 +26,38 @@ go.work
 
 # End of https://www.toptal.com/developers/gitignore/api/go
 
+# Shit
+.github/TODO
+
 # Local test files
 output/
+outputs/
 articulate-sample.json
 test-output.*
 go-os-arch-matrix.csv
+test_godocx.go
+test_input.json
 
 # Build artifacts
 build/
+
+# Old workflows
+.github/workflows/ci-old.yml
+.github/workflows/ci-enhanced.yml
+
+# Test coverage files
+coverage.out
+coverage.txt
+coverage
+*.cover
+*.coverprofile
+
+# Other common exclusions
+*.exe
+*.exe~
+*.dll
+*.so
+*.dylib
+*.test
+*.out
+/tmp/

README.md

@@ -1,14 +1,83 @@
 # Articulate Rise Parser
 
-A Go-based parser that converts Articulate Rise e-learning content to various formats including Markdown and Word documents.
+A Go-based parser that converts Articulate Rise e-learning content to various formats including Markdown, HTML, and Word documents.
+
+## System Architecture
+
+```mermaid
+flowchart TD
+    %% User Input
+    CLI[Command Line Interface<br/>main.go] --> APP{App Service<br/>services/app.go}
+    
+    %% Core Application Logic
+    APP --> |"ProcessCourseFromURI"| PARSER[Course Parser<br/>services/parser.go]
+    APP --> |"ProcessCourseFromFile"| PARSER
+    APP --> |"exportCourse"| FACTORY[Exporter Factory<br/>exporters/factory.go]
+    
+    %% Data Sources
+    PARSER --> |"FetchCourse"| API[Articulate Rise API<br/>rise.articulate.com]
+    PARSER --> |"LoadCourseFromFile"| FILE[Local JSON File<br/>*.json]
+    
+    %% Data Models
+    API --> MODELS[Data Models<br/>models/course.go]
+    FILE --> MODELS
+    MODELS --> |Course, Lesson, Item| APP
+    
+    %% Export Factory Pattern
+    FACTORY --> |"CreateExporter"| MARKDOWN[Markdown Exporter<br/>exporters/markdown.go]
+    FACTORY --> |"CreateExporter"| HTML[HTML Exporter<br/>exporters/html.go]
+    FACTORY --> |"CreateExporter"| DOCX[DOCX Exporter<br/>exporters/docx.go]
+    
+    %% HTML Cleaning Service
+    CLEANER[HTML Cleaner<br/>services/html_cleaner.go] --> MARKDOWN
+    CLEANER --> HTML
+    CLEANER --> DOCX
+    
+    %% Output Files
+    MARKDOWN --> |"Export"| MD_OUT[Markdown Files<br/>*.md]
+    HTML --> |"Export"| HTML_OUT[HTML Files<br/>*.html]
+    DOCX --> |"Export"| DOCX_OUT[Word Documents<br/>*.docx]
+    
+    %% Interfaces (Contracts)
+    IPARSER[CourseParser Interface<br/>interfaces/parser.go] -.-> PARSER
+    IEXPORTER[Exporter Interface<br/>interfaces/exporter.go] -.-> MARKDOWN
+    IEXPORTER -.-> HTML
+    IEXPORTER -.-> DOCX
+    IFACTORY[ExporterFactory Interface<br/>interfaces/exporter.go] -.-> FACTORY
+      %% Styling - Colors that work in both light and dark GitHub themes
+    classDef userInput fill:#dbeafe,stroke:#1e40af,stroke-width:2px,color:#1e40af
+    classDef coreLogic fill:#ede9fe,stroke:#6d28d9,stroke-width:2px,color:#6d28d9
+    classDef dataSource fill:#d1fae5,stroke:#059669,stroke-width:2px,color:#059669
+    classDef exporter fill:#fed7aa,stroke:#ea580c,stroke-width:2px,color:#ea580c
+    classDef output fill:#fce7f3,stroke:#be185d,stroke-width:2px,color:#be185d
+    classDef interface fill:#ecfdf5,stroke:#16a34a,stroke-width:1px,stroke-dasharray: 5 5,color:#16a34a
+    classDef service fill:#cffafe,stroke:#0891b2,stroke-width:2px,color:#0891b2
+    
+    class CLI userInput
+    class APP,FACTORY coreLogic
+    class API,FILE,MODELS dataSource
+    class MARKDOWN,HTML,DOCX exporter
+    class MD_OUT,HTML_OUT,DOCX_OUT output
+    class IPARSER,IEXPORTER,IFACTORY interface
+    class PARSER,CLEANER service
+```
+
+### Architecture Overview
+
+The system follows **Clean Architecture** principles with clear separation of concerns:
+
+-   **🎯 Entry Point**: Command-line interface handles user input and coordinates operations
+-   **🏗️ Application Layer**: Core business logic with dependency injection
+-   **📋 Interface Layer**: Contracts defining behavior without implementation details  
+-   **🔧 Service Layer**: Concrete implementations of parsing and utility services
+-   **📤 Export Layer**: Factory pattern for format-specific exporters
+-   **📊 Data Layer**: Domain models representing course structure
 
 [![Go version](https://img.shields.io/github/go-mod/go-version/kjanat/articulate-parser?logo=Go&logoColor=white)][gomod]
 [![Go Doc](https://godoc.org/github.com/kjanat/articulate-parser?status.svg)][Package documentation]
 [![Go Report Card](https://goreportcard.com/badge/github.com/kjanat/articulate-parser)][Go report]
-[![Tag](https://img.shields.io/github/v/tag/kjanat/articulate-parser?sort=semver&label=Tag)][Tags]
-[![Release Date](https://img.shields.io/github/release-date/kjanat/articulate-parser?label=Release%20date)][Latest release]
-[![License](https://img.shields.io/github/license/kjanat/articulate-parser?label=License)](LICENSE)
-[![Commit activity](https://img.shields.io/github/commit-activity/m/kjanat/articulate-parser?label=Commit%20activity)][Commits]
+[![Tag](https://img.shields.io/github/v/tag/kjanat/articulate-parser?sort=semver&label=Tag)][Tags] <!-- [![Release Date](https://img.shields.io/github/release-date/kjanat/articulate-parser?label=Release%20date)][Latest release] -->
+[![License](https://img.shields.io/github/license/kjanat/articulate-parser?label=License)][MIT License] <!-- [![Commit activity](https://img.shields.io/github/commit-activity/m/kjanat/articulate-parser?label=Commit%20activity)][Commits] -->
 [![Last commit](https://img.shields.io/github/last-commit/kjanat/articulate-parser?label=Last%20commit)][Commits]
 [![GitHub Issues or Pull Requests](https://img.shields.io/github/issues/kjanat/articulate-parser?label=Issues)][Issues]
 [![CI](https://img.shields.io/github/actions/workflow/status/kjanat/articulate-parser/ci.yml?logo=github&label=CI)][Build]
@@ -18,6 +87,7 @@ A Go-based parser that converts Articulate Rise e-learning content to various fo
 
 -   Parse Articulate Rise JSON data from URLs or local files
 -   Export to Markdown (.md) format
+-   Export to HTML (.html) format with professional styling
 -   Export to Word Document (.docx) format
 -   Support for various content types:
     -   Text content with headings and paragraphs
@@ -29,20 +99,50 @@ A Go-based parser that converts Articulate Rise e-learning content to various fo
 
 ## Installation
 
-1.  Ensure you have Go 1.21 or later installed
-2.  Clone or download the parser code
-3.  Initialize the Go module:
+### Prerequisites
+
+-   Go, I don't know the version, but I use go1.24.2 right now, and it works, see the [CI][Build] workflow where it is tested.
+
+### Install from source
 
 ```bash
-go mod init articulate-parser
-go mod tidy
+git clone https://github.com/kjanat/articulate-parser.git
+cd articulate-parser
+go mod download
+go build -o articulate-parser main.go
+```
+
+### Or install directly
+
+```bash
+go install github.com/kjanat/articulate-parser@latest
 ```
 
 ## Dependencies
 
 The parser uses the following external library:
 
--   `github.com/unidoc/unioffice` - For creating Word documents
+-   `github.com/fumiama/go-docx` - For creating Word documents (MIT license)
+
+## Testing
+
+Run the test suite:
+
+```bash
+go test ./...
+```
+
+Run tests with coverage:
+
+```bash
+go test -v -race -coverprofile=coverage.out ./...
+```
+
+View coverage report:
+
+```bash
+go tool cover -html=coverage.out
+```
 
 ## Usage
 
@@ -54,9 +154,11 @@ go run main.go <input_uri_or_file> <output_format> [output_path]
 
 #### Parameters
 
--   `input_uri_or_file`: Either an Articulate Rise share URL or path to a local JSON file
--   `output_format`: `md` for Markdown or `docx` for Word Document
--   `output_path`: Optional. If not provided, files are saved to `./output/` directory
+| Parameter           | Description                                                      | Default         |
+| ------------------- | ---------------------------------------------------------------- | --------------- |
+| `input_uri_or_file` | Either an Articulate Rise share URL or path to a local JSON file | None (required) |
+| `output_format`     | `md` for Markdown, `html` for HTML, or `docx` for Word Document  | None (required) |
+| `output_path`       | Path where output file will be saved.                            | `./output/`     |
 
 #### Examples
 
@@ -72,10 +174,16 @@ go run main.go "https://rise.articulate.com/share/N_APNg40Vr2CSH2xNz-ZLATM5kNviD
 go run main.go "articulate-sample.json" docx "my-course.docx"
 ```
 
-3.  **Parse from local file and export to Markdown:**
+3.  **Parse from local file and export to HTML:**
 
 ```bash
-go run main.go "C:\Users\kjana\Projects\articulate-parser\articulate-sample.json" md
+go run main.go "articulate-sample.json" html "output.html"
+```
+
+4.  **Parse from local file and export to Markdown:**
+
+```bash
+go run main.go "articulate-sample.json" md "output.md"
 ```
 
 ### Building the Executable
@@ -92,9 +200,29 @@ Then run:
 ./articulate-parser input.json md output.md
 ```
 
+## Development
+
+### Code Quality
+
+The project maintains high code quality standards:
+
+-   Cyclomatic complexity ≤ 15 (checked with [gocyclo](https://github.com/fzipp/gocyclo))
+-   Race condition detection enabled
+-   Comprehensive test coverage
+-   Code formatting with `gofmt`
+-   Static analysis with `go vet`
+
+### Contributing
+
+1.  Fork the repository
+2.  Create a feature branch
+3.  Make your changes
+4.  Run tests: `go test ./...`
+5.  Submit a pull request
+
 ## Output Formats
 
-### Markdown (.md)
+### Markdown (`.md`)
 
 -   Hierarchical structure with proper heading levels
 -   Clean text content with HTML tags removed
@@ -103,7 +231,16 @@ Then run:
 -   Media references included
 -   Course metadata at the top
 
-### Word Document (.docx)
+### HTML (`.html`)
+
+-   Professional styling with embedded CSS
+-   Interactive and visually appealing layout
+-   Proper HTML structure with semantic elements
+-   Responsive design for different screen sizes
+-   All content types beautifully formatted
+-   Maintains course hierarchy and organization
+
+### Word Document (`.docx`)
 
 -   Professional document formatting
 -   Bold headings and proper typography
@@ -167,13 +304,20 @@ The parser includes error handling for:
 -   Styling and visual formatting is not preserved
 -   Assessment logic and interactivity is lost in static exports
 
+## Performance
+
+-   Lightweight with minimal dependencies
+-   Fast JSON parsing and export
+-   Memory efficient processing
+-   No external license requirements
+
 ## Future Enhancements
 
 Potential improvements could include:
 
 -   PDF export support
 -   Media file downloading
--   HTML export with preserved styling
+-   ~~HTML export with preserved styling~~ ✅ **Completed**
 -   SCORM package support
 -   Batch processing capabilities
 -   Custom template support
@@ -188,6 +332,7 @@ This is a utility tool for educational content conversion. Please ensure you hav
 [Go report]: https://goreportcard.com/report/github.com/kjanat/articulate-parser
 [gomod]: go.mod
 [Issues]: https://github.com/kjanat/articulate-parser/issues
-[Latest release]: https://github.com/kjanat/articulate-parser/releases/latest
+<!-- [Latest release]: https://github.com/kjanat/articulate-parser/releases/latest -->
+[MIT License]: LICENSE
 [Package documentation]: https://godoc.org/github.com/kjanat/articulate-parser
 [Tags]: https://github.com/kjanat/articulate-parser/tags

go.mod

@@ -1,7 +1,10 @@
 module github.com/kjanat/articulate-parser
 
-go 1.21
+go 1.23.0
 
-require github.com/unidoc/unioffice v1.39.0
+require github.com/fumiama/go-docx v0.0.0-20250506085032-0c30fd09304b
 
-require github.com/richardlehane/msoleps v1.0.4 // indirect
+require (
+	github.com/fumiama/imgsz v0.0.4 // indirect
+	golang.org/x/image v0.27.0 // indirect
+)

go.sum

@@ -1,6 +1,6 @@
-github.com/richardlehane/msoleps v1.0.3 h1:aznSZzrwYRl3rLKRT3gUk9am7T/mLNSnJINvN0AQoVM=
-github.com/richardlehane/msoleps v1.0.3/go.mod h1:BWev5JBpU9Ko2WAgmZEuiz4/u3ZYTKbjLycmwiWUfWg=
-github.com/richardlehane/msoleps v1.0.4 h1:WuESlvhX3gH2IHcd8UqyCuFY5yiq/GR/yqaSM/9/g00=
-github.com/richardlehane/msoleps v1.0.4/go.mod h1:BWev5JBpU9Ko2WAgmZEuiz4/u3ZYTKbjLycmwiWUfWg=
-github.com/unidoc/unioffice v1.39.0 h1:Wo5zvrzCqhyK/1Zi5dg8a5F5+NRftIMZPnFPYwruLto=
-github.com/unidoc/unioffice v1.39.0/go.mod h1:Axz6ltIZZTUUyHoEnPe4Mb3VmsN4TRHT5iZCGZ1rgnU=
+github.com/fumiama/go-docx v0.0.0-20250506085032-0c30fd09304b h1:/mxSugRc4SgN7XgBtT19dAJ7cAXLTbPmlJLJE4JjRkE=
+github.com/fumiama/go-docx v0.0.0-20250506085032-0c30fd09304b/go.mod h1:ssRF0IaB1hCcKIObp3FkZOsjTcAHpgii70JelNb4H8M=
+github.com/fumiama/imgsz v0.0.4 h1:Lsasu2hdSSFS+vnD+nvR1UkiRMK7hcpyYCC0FzgSMFI=
+github.com/fumiama/imgsz v0.0.4/go.mod h1:bISOQVTlw9sRytPwe8ir7tAaEmyz9hSNj9n8mXMBG0E=
+golang.org/x/image v0.27.0 h1:C8gA4oWU/tKkdCfYT6T2u4faJu3MeNS5O8UPWlPF61w=
+golang.org/x/image v0.27.0/go.mod h1:xbdrClrAUway1MUTEZDq9mz/UpRwYAkFFNUslZtcB+g=

internal/exporters/docx.go

@@ -0,0 +1,189 @@
+// Package exporters provides implementations of the Exporter interface
+// for converting Articulate Rise courses into various file formats.
+package exporters
+
+import (
+	"fmt"
+	"os"
+	"strings"
+
+	"github.com/fumiama/go-docx"
+	"github.com/kjanat/articulate-parser/internal/interfaces"
+	"github.com/kjanat/articulate-parser/internal/models"
+	"github.com/kjanat/articulate-parser/internal/services"
+)
+
+// DocxExporter implements the Exporter interface for DOCX format.
+// It converts Articulate Rise course data into a Microsoft Word document
+// using the go-docx package.
+type DocxExporter struct {
+	// htmlCleaner is used to convert HTML content to plain text
+	htmlCleaner *services.HTMLCleaner
+}
+
+// NewDocxExporter creates a new DocxExporter instance.
+// It takes an HTMLCleaner to handle HTML content conversion.
+//
+// Parameters:
+//   - htmlCleaner: Service for cleaning HTML content in course data
+//
+// Returns:
+//   - An implementation of the Exporter interface for DOCX format
+func NewDocxExporter(htmlCleaner *services.HTMLCleaner) interfaces.Exporter {
+	return &DocxExporter{
+		htmlCleaner: htmlCleaner,
+	}
+}
+
+// Export exports the course to a DOCX file.
+// It creates a Word document with formatted content based on the course data
+// and saves it to the specified output path.
+//
+// Parameters:
+//   - course: The course data model to export
+//   - outputPath: The file path where the DOCX content will be written
+//
+// Returns:
+//   - An error if creating or saving the document fails
+func (e *DocxExporter) Export(course *models.Course, outputPath string) error {
+	doc := docx.New()
+
+	// Add title
+	titlePara := doc.AddParagraph()
+	titlePara.AddText(course.Course.Title).Size("32").Bold()
+
+	// Add description if available
+	if course.Course.Description != "" {
+		descPara := doc.AddParagraph()
+		cleanDesc := e.htmlCleaner.CleanHTML(course.Course.Description)
+		descPara.AddText(cleanDesc)
+	}
+
+	// Add each lesson
+	for _, lesson := range course.Course.Lessons {
+		e.exportLesson(doc, &lesson)
+	}
+
+	// Ensure output directory exists and add .docx extension
+	if !strings.HasSuffix(strings.ToLower(outputPath), ".docx") {
+		outputPath = outputPath + ".docx"
+	}
+
+	// Create the file
+	file, err := os.Create(outputPath)
+	if err != nil {
+		return fmt.Errorf("failed to create output file: %w", err)
+	}
+	defer file.Close()
+
+	// Save the document
+	_, err = doc.WriteTo(file)
+	if err != nil {
+		return fmt.Errorf("failed to save document: %w", err)
+	}
+
+	return nil
+}
+
+// exportLesson adds a lesson to the document with appropriate formatting.
+// It creates a lesson heading, adds the description, and processes all items in the lesson.
+//
+// Parameters:
+//   - doc: The Word document being created
+//   - lesson: The lesson data model to export
+func (e *DocxExporter) exportLesson(doc *docx.Docx, lesson *models.Lesson) {
+	// Add lesson title
+	lessonPara := doc.AddParagraph()
+	lessonPara.AddText(fmt.Sprintf("Lesson: %s", lesson.Title)).Size("28").Bold()
+
+	// Add lesson description if available
+	if lesson.Description != "" {
+		descPara := doc.AddParagraph()
+		cleanDesc := e.htmlCleaner.CleanHTML(lesson.Description)
+		descPara.AddText(cleanDesc)
+	}
+
+	// Add each item in the lesson
+	for _, item := range lesson.Items {
+		e.exportItem(doc, &item)
+	}
+}
+
+// exportItem adds an item to the document.
+// It creates an item heading and processes all sub-items within the item.
+//
+// Parameters:
+//   - doc: The Word document being created
+//   - item: The item data model to export
+func (e *DocxExporter) exportItem(doc *docx.Docx, item *models.Item) {
+	// Add item type as heading
+	if item.Type != "" {
+		itemPara := doc.AddParagraph()
+		itemPara.AddText(strings.Title(item.Type)).Size("24").Bold()
+	}
+
+	// Add sub-items
+	for _, subItem := range item.Items {
+		e.exportSubItem(doc, &subItem)
+	}
+}
+
+// exportSubItem adds a sub-item to the document.
+// It handles different components of a sub-item like title, heading,
+// paragraph content, answers, and feedback.
+//
+// Parameters:
+//   - doc: The Word document being created
+//   - subItem: The sub-item data model to export
+func (e *DocxExporter) exportSubItem(doc *docx.Docx, subItem *models.SubItem) {
+	// Add title if available
+	if subItem.Title != "" {
+		subItemPara := doc.AddParagraph()
+		subItemPara.AddText("  " + subItem.Title).Bold() // Indented
+	}
+
+	// Add heading if available
+	if subItem.Heading != "" {
+		headingPara := doc.AddParagraph()
+		cleanHeading := e.htmlCleaner.CleanHTML(subItem.Heading)
+		headingPara.AddText("  " + cleanHeading).Bold() // Indented
+	}
+
+	// Add paragraph content if available
+	if subItem.Paragraph != "" {
+		contentPara := doc.AddParagraph()
+		cleanContent := e.htmlCleaner.CleanHTML(subItem.Paragraph)
+		contentPara.AddText("  " + cleanContent) // Indented
+	}
+
+	// Add answers if this is a question
+	if len(subItem.Answers) > 0 {
+		answersPara := doc.AddParagraph()
+		answersPara.AddText("  Answers:").Bold()
+
+		for i, answer := range subItem.Answers {
+			answerPara := doc.AddParagraph()
+			prefix := fmt.Sprintf("    %d. ", i+1)
+			if answer.Correct {
+				prefix += "✓ "
+			}
+			cleanAnswer := e.htmlCleaner.CleanHTML(answer.Title)
+			answerPara.AddText(prefix + cleanAnswer)
+		}
+	}
+
+	// Add feedback if available
+	if subItem.Feedback != "" {
+		feedbackPara := doc.AddParagraph()
+		cleanFeedback := e.htmlCleaner.CleanHTML(subItem.Feedback)
+		feedbackPara.AddText("  Feedback: " + cleanFeedback).Italic()
+	}
+}
+
+// GetSupportedFormat returns the format name this exporter supports.
+//
+// Returns:
+//   - A string representing the supported format ("docx")
+func (e *DocxExporter) GetSupportedFormat() string {
+	return "docx"
+}

internal/exporters/docx_test.go

@@ -0,0 +1,679 @@
+// Package exporters_test provides tests for the docx exporter.
+package exporters
+
+import (
+	"os"
+	"path/filepath"
+	"testing"
+
+	"github.com/kjanat/articulate-parser/internal/models"
+	"github.com/kjanat/articulate-parser/internal/services"
+)
+
+// TestNewDocxExporter tests the NewDocxExporter constructor.
+func TestNewDocxExporter(t *testing.T) {
+	htmlCleaner := services.NewHTMLCleaner()
+	exporter := NewDocxExporter(htmlCleaner)
+
+	if exporter == nil {
+		t.Fatal("NewDocxExporter() returned nil")
+	}
+
+	// Type assertion to check internal structure
+	docxExporter, ok := exporter.(*DocxExporter)
+	if !ok {
+		t.Fatal("NewDocxExporter() returned wrong type")
+	}
+
+	if docxExporter.htmlCleaner == nil {
+		t.Error("htmlCleaner should not be nil")
+	}
+}
+
+// TestDocxExporter_GetSupportedFormat tests the GetSupportedFormat method.
+func TestDocxExporter_GetSupportedFormat(t *testing.T) {
+	htmlCleaner := services.NewHTMLCleaner()
+	exporter := NewDocxExporter(htmlCleaner)
+
+	expected := "docx"
+	result := exporter.GetSupportedFormat()
+
+	if result != expected {
+		t.Errorf("Expected format '%s', got '%s'", expected, result)
+	}
+}
+
+// TestDocxExporter_Export tests the Export method.
+func TestDocxExporter_Export(t *testing.T) {
+	htmlCleaner := services.NewHTMLCleaner()
+	exporter := NewDocxExporter(htmlCleaner)
+
+	// Create test course
+	testCourse := createTestCourseForDocx()
+
+	// Create temporary directory and file
+	tempDir := t.TempDir()
+	outputPath := filepath.Join(tempDir, "test-course.docx")
+
+	// Test successful export
+	err := exporter.Export(testCourse, outputPath)
+	if err != nil {
+		t.Fatalf("Export failed: %v", err)
+	}
+
+	// Check that file was created
+	if _, err := os.Stat(outputPath); os.IsNotExist(err) {
+		t.Fatal("Output file was not created")
+	}
+
+	// Verify file has some content (basic check)
+	fileInfo, err := os.Stat(outputPath)
+	if err != nil {
+		t.Fatalf("Failed to get file info: %v", err)
+	}
+
+	if fileInfo.Size() == 0 {
+		t.Error("Output file is empty")
+	}
+}
+
+// TestDocxExporter_Export_AddDocxExtension tests that the .docx extension is added automatically.
+func TestDocxExporter_Export_AddDocxExtension(t *testing.T) {
+	htmlCleaner := services.NewHTMLCleaner()
+	exporter := NewDocxExporter(htmlCleaner)
+
+	testCourse := createTestCourseForDocx()
+
+	// Create temporary directory and file without .docx extension
+	tempDir := t.TempDir()
+	outputPath := filepath.Join(tempDir, "test-course")
+
+	err := exporter.Export(testCourse, outputPath)
+	if err != nil {
+
+		t.Fatalf("Export failed: %v", err)
+	}
+
+	// Check that file was created with .docx extension
+	expectedPath := outputPath + ".docx"
+	if _, err := os.Stat(expectedPath); os.IsNotExist(err) {
+		t.Fatal("Output file with .docx extension was not created")
+	}
+}
+
+// TestDocxExporter_Export_InvalidPath tests export with invalid output path.
+func TestDocxExporter_Export_InvalidPath(t *testing.T) {
+	htmlCleaner := services.NewHTMLCleaner()
+	exporter := NewDocxExporter(htmlCleaner)
+
+	testCourse := createTestCourseForDocx()
+
+	// Try to write to invalid path
+	invalidPath := "/invalid/path/that/does/not/exist/file.docx"
+	err := exporter.Export(testCourse, invalidPath)
+
+	if err == nil {
+		t.Fatal("Expected error for invalid path, got nil")
+	}
+}
+
+// TestDocxExporter_ExportLesson tests the exportLesson method indirectly through Export.
+func TestDocxExporter_ExportLesson(t *testing.T) {
+	htmlCleaner := services.NewHTMLCleaner()
+	exporter := NewDocxExporter(htmlCleaner)
+
+	// Create course with specific lesson content
+	course := &models.Course{
+		ShareID: "test-id",
+		Course: models.CourseInfo{
+			ID:    "test-course",
+			Title: "Test Course",
+			Lessons: []models.Lesson{
+				{
+					ID:          "lesson-1",
+					Title:       "Test Lesson",
+					Type:        "lesson",
+					Description: "<p>Test lesson description with <strong>bold</strong> text.</p>",
+					Items: []models.Item{
+						{
+							Type: "text",
+							Items: []models.SubItem{
+								{
+									Title:     "Test Item Title",
+									Paragraph: "<p>Test paragraph content.</p>",
+								},
+							},
+						},
+					},
+				},
+			},
+		},
+	}
+
+	tempDir := t.TempDir()
+	outputPath := filepath.Join(tempDir, "lesson-test.docx")
+
+	err := exporter.Export(course, outputPath)
+	if err != nil {
+
+		t.Fatalf("Export failed: %v", err)
+	}
+
+	// Verify file was created successfully
+	if _, err := os.Stat(outputPath); os.IsNotExist(err) {
+		t.Fatal("Output file was not created")
+	}
+}
+
+// TestDocxExporter_ExportItem tests the exportItem method indirectly through Export.
+func TestDocxExporter_ExportItem(t *testing.T) {
+	htmlCleaner := services.NewHTMLCleaner()
+	exporter := NewDocxExporter(htmlCleaner)
+
+	// Create course with different item types
+	course := &models.Course{
+		ShareID: "test-id",
+		Course: models.CourseInfo{
+			ID:    "test-course",
+			Title: "Item Test Course",
+			Lessons: []models.Lesson{
+				{
+					ID:    "lesson-1",
+					Title: "Item Types Lesson",
+					Type:  "lesson",
+					Items: []models.Item{
+						{
+							Type: "text",
+							Items: []models.SubItem{
+								{
+									Title:     "Text Item",
+									Paragraph: "<p>Text content</p>",
+								},
+							},
+						},
+						{
+							Type: "list",
+							Items: []models.SubItem{
+								{Paragraph: "<p>List item 1</p>"},
+								{Paragraph: "<p>List item 2</p>"},
+							},
+						},
+						{
+							Type: "knowledgeCheck",
+							Items: []models.SubItem{
+								{
+									Title: "<p>What is the answer?</p>",
+									Answers: []models.Answer{
+										{Title: "Option A", Correct: false},
+										{Title: "Option B", Correct: true},
+									},
+									Feedback: "<p>Correct answer explanation</p>",
+								},
+							},
+						},
+					},
+				},
+			},
+		},
+	}
+
+	tempDir := t.TempDir()
+	outputPath := filepath.Join(tempDir, "items-test.docx")
+
+	err := exporter.Export(course, outputPath)
+	if err != nil {
+
+		t.Fatalf("Export failed: %v", err)
+	}
+
+	// Verify file was created successfully
+	if _, err := os.Stat(outputPath); os.IsNotExist(err) {
+		t.Fatal("Output file was not created")
+	}
+}
+
+// TestDocxExporter_ExportSubItem tests the exportSubItem method indirectly through Export.
+func TestDocxExporter_ExportSubItem(t *testing.T) {
+	htmlCleaner := services.NewHTMLCleaner()
+	exporter := NewDocxExporter(htmlCleaner)
+
+	// Create course with sub-item containing all possible fields
+	course := &models.Course{
+		ShareID: "test-id",
+		Course: models.CourseInfo{
+			ID:    "test-course",
+			Title: "SubItem Test Course",
+			Lessons: []models.Lesson{
+				{
+					ID:    "lesson-1",
+					Title: "SubItem Test Lesson",
+					Type:  "lesson",
+					Items: []models.Item{
+						{
+							Type: "knowledgeCheck",
+							Items: []models.SubItem{
+								{
+									Title:     "<p>Question Title</p>",
+									Heading:   "<h3>Question Heading</h3>",
+									Paragraph: "<p>Question description with <em>emphasis</em>.</p>",
+									Answers: []models.Answer{
+										{Title: "Wrong answer", Correct: false},
+										{Title: "Correct answer", Correct: true},
+										{Title: "Another wrong answer", Correct: false},
+									},
+									Feedback: "<p>Feedback with <strong>formatting</strong>.</p>",
+								},
+							},
+						},
+					},
+				},
+			},
+		},
+	}
+
+	tempDir := t.TempDir()
+	outputPath := filepath.Join(tempDir, "subitem-test.docx")
+
+	err := exporter.Export(course, outputPath)
+	if err != nil {
+
+		t.Fatalf("Export failed: %v", err)
+	}
+
+	// Verify file was created successfully
+	if _, err := os.Stat(outputPath); os.IsNotExist(err) {
+		t.Fatal("Output file was not created")
+	}
+}
+
+// TestDocxExporter_ComplexCourse tests export of a complex course structure.
+func TestDocxExporter_ComplexCourse(t *testing.T) {
+	htmlCleaner := services.NewHTMLCleaner()
+	exporter := NewDocxExporter(htmlCleaner)
+
+	// Create complex test course
+	course := &models.Course{
+		ShareID: "complex-test-id",
+		Course: models.CourseInfo{
+			ID:          "complex-course",
+			Title:       "Complex Test Course",
+			Description: "<p>This is a <strong>complex</strong> course description with <em>formatting</em>.</p>",
+			Lessons: []models.Lesson{
+				{
+					ID:    "section-1",
+					Title: "Course Section",
+					Type:  "section",
+				},
+				{
+					ID:          "lesson-1",
+					Title:       "Introduction Lesson",
+					Type:        "lesson",
+					Description: "<p>Introduction to the course with <code>code</code> and <a href='#'>links</a>.</p>",
+					Items: []models.Item{
+						{
+							Type: "text",
+							Items: []models.SubItem{
+								{
+									Heading:   "<h2>Welcome</h2>",
+									Paragraph: "<p>Welcome to our comprehensive course!</p>",
+								},
+							},
+						},
+						{
+							Type: "list",
+							Items: []models.SubItem{
+								{Paragraph: "<p>Learn advanced concepts</p>"},
+								{Paragraph: "<p>Practice with real examples</p>"},
+								{Paragraph: "<p>Apply knowledge in projects</p>"},
+							},
+						},
+						{
+							Type: "multimedia",
+							Items: []models.SubItem{
+								{
+									Title:   "<p>Video Introduction</p>",
+									Caption: "<p>Watch this introductory video</p>",
+									Media: &models.Media{
+										Video: &models.VideoMedia{
+											OriginalUrl: "https://example.com/intro.mp4",
+											Duration:    300,
+										},
+									},
+								},
+							},
+						},
+						{
+							Type: "knowledgeCheck",
+							Items: []models.SubItem{
+								{
+									Title: "<p>What will you learn in this course?</p>",
+									Answers: []models.Answer{
+										{Title: "Basic concepts only", Correct: false},
+										{Title: "Advanced concepts and practical application", Correct: true},
+										{Title: "Theory without practice", Correct: false},
+									},
+									Feedback: "<p>Excellent! This course covers both theory and practice.</p>",
+								},
+							},
+						},
+						{
+							Type: "image",
+							Items: []models.SubItem{
+								{
+									Caption: "<p>Course overview diagram</p>",
+									Media: &models.Media{
+										Image: &models.ImageMedia{
+											OriginalUrl: "https://example.com/overview.png",
+										},
+									},
+								},
+							},
+						},
+						{
+							Type: "interactive",
+							Items: []models.SubItem{
+								{
+									Title: "<p>Interactive Exercise</p>",
+								},
+							},
+						},
+					},
+				},
+				{
+					ID:    "lesson-2",
+					Title: "Advanced Topics",
+					Type:  "lesson",
+					Items: []models.Item{
+						{
+							Type: "divider",
+						},
+						{
+							Type: "unknown",
+							Items: []models.SubItem{
+								{
+									Title:     "<p>Custom Content</p>",
+									Paragraph: "<p>This is custom content type</p>",
+								},
+							},
+						},
+					},
+				},
+			},
+		},
+	}
+
+	// Create temporary output file
+	tempDir := t.TempDir()
+	outputPath := filepath.Join(tempDir, "complex-course.docx")
+
+	// Export course
+	err := exporter.Export(course, outputPath)
+	if err != nil {
+
+		t.Fatalf("Export failed: %v", err)
+	}
+
+	// Verify file was created and has reasonable size
+	fileInfo, err := os.Stat(outputPath)
+	if err != nil {
+		t.Fatalf("Failed to get file info: %v", err)
+	}
+
+	if fileInfo.Size() < 1000 {
+		t.Error("Output file seems too small for complex course content")
+	}
+}
+
+// TestDocxExporter_EmptyCourse tests export of an empty course.
+func TestDocxExporter_EmptyCourse(t *testing.T) {
+	htmlCleaner := services.NewHTMLCleaner()
+	exporter := NewDocxExporter(htmlCleaner)
+
+	// Create minimal course
+	course := &models.Course{
+		ShareID: "empty-id",
+		Course: models.CourseInfo{
+			ID:      "empty-course",
+			Title:   "Empty Course",
+			Lessons: []models.Lesson{},
+		},
+	}
+
+	tempDir := t.TempDir()
+	outputPath := filepath.Join(tempDir, "empty-course.docx")
+
+	err := exporter.Export(course, outputPath)
+	if err != nil {
+
+		t.Fatalf("Export failed: %v", err)
+	}
+
+	// Verify file was created
+	if _, err := os.Stat(outputPath); os.IsNotExist(err) {
+		t.Fatal("Output file was not created")
+	}
+}
+
+// TestDocxExporter_HTMLCleaning tests that HTML content is properly cleaned.
+func TestDocxExporter_HTMLCleaning(t *testing.T) {
+	htmlCleaner := services.NewHTMLCleaner()
+	exporter := NewDocxExporter(htmlCleaner)
+
+	// Create course with HTML content that needs cleaning
+	course := &models.Course{
+		ShareID: "html-test-id",
+		Course: models.CourseInfo{
+			ID:          "html-test-course",
+			Title:       "HTML Cleaning Test",
+			Description: "<p>Description with <script>alert('xss')</script> and <b>bold</b> text.</p>",
+			Lessons: []models.Lesson{
+				{
+					ID:          "lesson-1",
+					Title:       "Test Lesson",
+					Type:        "lesson",
+					Description: "<div>Lesson description with <span style='color:red'>styled</span> content.</div>",
+					Items: []models.Item{
+						{
+							Type: "text",
+							Items: []models.SubItem{
+								{
+									Heading:   "<h1>Heading with <em>emphasis</em> and &amp; entities</h1>",
+									Paragraph: "<p>Paragraph with &lt;code&gt; entities and <strong>formatting</strong>.</p>",
+								},
+							},
+						},
+					},
+				},
+			},
+		},
+	}
+
+	tempDir := t.TempDir()
+	outputPath := filepath.Join(tempDir, "html-cleaning-test.docx")
+
+	err := exporter.Export(course, outputPath)
+	if err != nil {
+
+		t.Fatalf("Export failed: %v", err)
+	}
+
+	// Verify file was created (basic check that HTML cleaning didn't break export)
+	if _, err := os.Stat(outputPath); os.IsNotExist(err) {
+		t.Fatal("Output file was not created")
+	}
+}
+
+// TestDocxExporter_ExistingDocxExtension tests that existing .docx extension is preserved.
+func TestDocxExporter_ExistingDocxExtension(t *testing.T) {
+	htmlCleaner := services.NewHTMLCleaner()
+	exporter := NewDocxExporter(htmlCleaner)
+
+	testCourse := createTestCourseForDocx()
+
+	// Use path that already has .docx extension
+	tempDir := t.TempDir()
+	outputPath := filepath.Join(tempDir, "test-course.docx")
+
+	err := exporter.Export(testCourse, outputPath)
+	if err != nil {
+
+		t.Fatalf("Export failed: %v", err)
+	}
+
+	// Check that file was created at the exact path (no double extension)
+	if _, err := os.Stat(outputPath); os.IsNotExist(err) {
+		t.Fatal("Output file was not created at expected path")
+	}
+
+	// Ensure no double extension was created
+	doubleExtensionPath := outputPath + ".docx"
+	if _, err := os.Stat(doubleExtensionPath); err == nil {
+		t.Error("Double .docx extension file should not exist")
+	}
+}
+
+// TestDocxExporter_CaseInsensitiveExtension tests that extension checking is case-insensitive.
+func TestDocxExporter_CaseInsensitiveExtension(t *testing.T) {
+	htmlCleaner := services.NewHTMLCleaner()
+	exporter := NewDocxExporter(htmlCleaner)
+
+	testCourse := createTestCourseForDocx()
+
+	// Test various case combinations
+	testCases := []string{
+		"test-course.DOCX",
+		"test-course.Docx",
+		"test-course.DocX",
+	}
+
+	for i, testCase := range testCases {
+		tempDir := t.TempDir()
+		outputPath := filepath.Join(tempDir, testCase)
+
+		err := exporter.Export(testCourse, outputPath)
+		if err != nil {
+
+			t.Fatalf("Export failed for case %d (%s): %v", i, testCase, err)
+		}
+
+		// Check that file was created at the exact path (no additional extension)
+		if _, err := os.Stat(outputPath); os.IsNotExist(err) {
+			t.Fatalf("Output file was not created at expected path for case %d (%s)", i, testCase)
+		}
+	}
+}
+
+// createTestCourseForDocx creates a test course for DOCX export testing.
+func createTestCourseForDocx() *models.Course {
+	return &models.Course{
+		ShareID: "test-share-id",
+		Course: models.CourseInfo{
+			ID:          "test-course-id",
+			Title:       "Test Course",
+			Description: "<p>Test course description with <strong>formatting</strong>.</p>",
+			Lessons: []models.Lesson{
+				{
+					ID:    "section-1",
+					Title: "Test Section",
+					Type:  "section",
+				},
+				{
+					ID:          "lesson-1",
+					Title:       "Test Lesson",
+					Type:        "lesson",
+					Description: "<p>Test lesson description</p>",
+					Items: []models.Item{
+						{
+							Type: "text",
+							Items: []models.SubItem{
+								{
+									Heading:   "<h2>Test Heading</h2>",
+									Paragraph: "<p>Test paragraph content.</p>",
+								},
+							},
+						},
+						{
+							Type: "list",
+							Items: []models.SubItem{
+								{Paragraph: "<p>First list item</p>"},
+								{Paragraph: "<p>Second list item</p>"},
+							},
+						},
+					},
+				},
+			},
+		},
+	}
+}
+
+// BenchmarkDocxExporter_Export benchmarks the Export method.
+func BenchmarkDocxExporter_Export(b *testing.B) {
+	htmlCleaner := services.NewHTMLCleaner()
+	exporter := NewDocxExporter(htmlCleaner)
+	course := createTestCourseForDocx()
+
+	// Create temporary directory
+	tempDir := b.TempDir()
+
+	b.ResetTimer()
+	for i := 0; i < b.N; i++ {
+		outputPath := filepath.Join(tempDir, "benchmark-course.docx")
+		_ = exporter.Export(course, outputPath)
+		// Clean up for next iteration
+		os.Remove(outputPath)
+	}
+}
+
+// BenchmarkDocxExporter_ComplexCourse benchmarks export of a complex course.
+func BenchmarkDocxExporter_ComplexCourse(b *testing.B) {
+	htmlCleaner := services.NewHTMLCleaner()
+	exporter := NewDocxExporter(htmlCleaner)
+
+	// Create complex course for benchmarking
+	course := &models.Course{
+		ShareID: "benchmark-id",
+		Course: models.CourseInfo{
+			ID:          "benchmark-course",
+			Title:       "Benchmark Course",
+			Description: "<p>Complex course for performance testing</p>",
+			Lessons:     make([]models.Lesson, 10), // 10 lessons
+		},
+	}
+
+	// Fill with test data
+	for i := 0; i < 10; i++ {
+		lesson := models.Lesson{
+			ID:    "lesson-" + string(rune(i)),
+			Title: "Lesson " + string(rune(i)),
+			Type:  "lesson",
+			Items: make([]models.Item, 5), // 5 items per lesson
+		}
+
+		for j := 0; j < 5; j++ {
+			item := models.Item{
+				Type:  "text",
+				Items: make([]models.SubItem, 3), // 3 sub-items per item
+			}
+
+			for k := 0; k < 3; k++ {
+				item.Items[k] = models.SubItem{
+					Heading:   "<h3>Heading " + string(rune(k)) + "</h3>",
+					Paragraph: "<p>Paragraph content with <strong>formatting</strong> for performance testing.</p>",
+				}
+			}
+
+			lesson.Items[j] = item
+		}
+
+		course.Course.Lessons[i] = lesson
+	}
+
+	tempDir := b.TempDir()
+
+	b.ResetTimer()
+	for i := 0; i < b.N; i++ {
+		outputPath := filepath.Join(tempDir, "benchmark-complex.docx")
+		_ = exporter.Export(course, outputPath)
+		os.Remove(outputPath)
+	}
+}

internal/exporters/factory.go

@@ -0,0 +1,65 @@
+// Package exporters provides implementations of the Exporter interface
+// for converting Articulate Rise courses into various file formats.
+package exporters
+
+import (
+	"fmt"
+	"strings"
+
+	"github.com/kjanat/articulate-parser/internal/interfaces"
+	"github.com/kjanat/articulate-parser/internal/services"
+)
+
+// Factory implements the ExporterFactory interface.
+// It creates appropriate exporter instances based on the requested format.
+type Factory struct {
+	// htmlCleaner is used by exporters to convert HTML content to plain text
+	htmlCleaner *services.HTMLCleaner
+}
+
+// NewFactory creates a new exporter factory.
+// It takes an HTMLCleaner instance that will be passed to the exporters
+// created by this factory.
+//
+// Parameters:
+//   - htmlCleaner: Service for cleaning HTML content in course data
+//
+// Returns:
+//   - An implementation of the ExporterFactory interface
+func NewFactory(htmlCleaner *services.HTMLCleaner) interfaces.ExporterFactory {
+	return &Factory{
+		htmlCleaner: htmlCleaner,
+	}
+}
+
+// CreateExporter creates an exporter for the specified format.
+// It returns an appropriate exporter implementation based on the format string.
+// Format strings are case-insensitive.
+//
+// Parameters:
+//   - format: The desired export format (e.g., "markdown", "docx")
+//
+// Returns:
+//   - An implementation of the Exporter interface if the format is supported
+//   - An error if the format is not supported
+func (f *Factory) CreateExporter(format string) (interfaces.Exporter, error) {
+	switch strings.ToLower(format) {
+	case "markdown", "md":
+		return NewMarkdownExporter(f.htmlCleaner), nil
+	case "docx", "word":
+		return NewDocxExporter(f.htmlCleaner), nil
+	case "html", "htm":
+		return NewHTMLExporter(f.htmlCleaner), nil
+	default:
+		return nil, fmt.Errorf("unsupported export format: %s", format)
+	}
+}
+
+// GetSupportedFormats returns a list of all supported export formats.
+// This includes both primary format names and their aliases.
+//
+// Returns:
+//   - A string slice containing all supported format names
+func (f *Factory) GetSupportedFormats() []string {
+	return []string{"markdown", "md", "docx", "word", "html", "htm"}
+}

internal/exporters/factory_test.go

@@ -0,0 +1,478 @@
+// Package exporters_test provides tests for the exporter factory.
+package exporters
+
+import (
+	"reflect"
+	"sort"
+	"strings"
+	"testing"
+
+	"github.com/kjanat/articulate-parser/internal/services"
+)
+
+// TestNewFactory tests the NewFactory constructor.
+func TestNewFactory(t *testing.T) {
+	htmlCleaner := services.NewHTMLCleaner()
+	factory := NewFactory(htmlCleaner)
+
+	if factory == nil {
+		t.Fatal("NewFactory() returned nil")
+	}
+
+	// Type assertion to check internal structure
+	factoryImpl, ok := factory.(*Factory)
+	if !ok {
+		t.Fatal("NewFactory() returned wrong type")
+	}
+
+	if factoryImpl.htmlCleaner == nil {
+		t.Error("htmlCleaner should not be nil")
+	}
+}
+
+// TestFactory_CreateExporter tests the CreateExporter method for all supported formats.
+func TestFactory_CreateExporter(t *testing.T) {
+	htmlCleaner := services.NewHTMLCleaner()
+	factory := NewFactory(htmlCleaner)
+
+	testCases := []struct {
+		name           string
+		format         string
+		expectedType   string
+		expectedFormat string
+		shouldError    bool
+	}{
+		{
+			name:           "markdown format",
+			format:         "markdown",
+			expectedType:   "*exporters.MarkdownExporter",
+			expectedFormat: "markdown",
+			shouldError:    false,
+		},
+		{
+			name:           "md format alias",
+			format:         "md",
+			expectedType:   "*exporters.MarkdownExporter",
+			expectedFormat: "markdown",
+			shouldError:    false,
+		},
+		{
+			name:           "docx format",
+			format:         "docx",
+			expectedType:   "*exporters.DocxExporter",
+			expectedFormat: "docx",
+			shouldError:    false,
+		},
+		{
+			name:           "word format alias",
+			format:         "word",
+			expectedType:   "*exporters.DocxExporter",
+			expectedFormat: "docx",
+			shouldError:    false,
+		},
+		{
+			name:           "html format",
+			format:         "html",
+			expectedType:   "*exporters.HTMLExporter",
+			expectedFormat: "html",
+			shouldError:    false,
+		},
+		{
+			name:           "htm format alias",
+			format:         "htm",
+			expectedType:   "*exporters.HTMLExporter",
+			expectedFormat: "html",
+			shouldError:    false,
+		},
+		{
+			name:        "unsupported format",
+			format:      "pdf",
+			shouldError: true,
+		},
+		{
+			name:        "empty format",
+			format:      "",
+			shouldError: true,
+		},
+	}
+
+	for _, tc := range testCases {
+		t.Run(tc.name, func(t *testing.T) {
+			exporter, err := factory.CreateExporter(tc.format)
+
+			if tc.shouldError {
+				if err == nil {
+					t.Errorf("Expected error for format '%s', but got nil", tc.format)
+				}
+				if exporter != nil {
+					t.Errorf("Expected nil exporter for unsupported format '%s'", tc.format)
+				}
+				return
+			}
+
+			if err != nil {
+				t.Fatalf("Unexpected error creating exporter for format '%s': %v", tc.format, err)
+			}
+
+			if exporter == nil {
+				t.Fatalf("CreateExporter returned nil for supported format '%s'", tc.format)
+			}
+
+			// Check type
+			exporterType := reflect.TypeOf(exporter).String()
+			if exporterType != tc.expectedType {
+				t.Errorf("Expected exporter type '%s' for format '%s', got '%s'", tc.expectedType, tc.format, exporterType)
+			}
+
+			// Check supported format
+			supportedFormat := exporter.GetSupportedFormat()
+			if supportedFormat != tc.expectedFormat {
+				t.Errorf("Expected supported format '%s' for format '%s', got '%s'", tc.expectedFormat, tc.format, supportedFormat)
+			}
+		})
+	}
+}
+
+// TestFactory_CreateExporter_CaseInsensitive tests that format strings are case-insensitive.
+func TestFactory_CreateExporter_CaseInsensitive(t *testing.T) {
+	htmlCleaner := services.NewHTMLCleaner()
+	factory := NewFactory(htmlCleaner)
+
+	testCases := []struct {
+		format         string
+		expectedFormat string
+	}{
+		{"MARKDOWN", "markdown"},
+		{"Markdown", "markdown"},
+		{"MarkDown", "markdown"},
+		{"MD", "markdown"},
+		{"Md", "markdown"},
+		{"DOCX", "docx"},
+		{"Docx", "docx"},
+		{"DocX", "docx"},
+		{"WORD", "docx"},
+		{"Word", "docx"},
+		{"WoRd", "docx"},
+		{"HTML", "html"},
+		{"Html", "html"},
+		{"HtMl", "html"},
+		{"HTM", "html"},
+		{"Htm", "html"},
+		{"HtM", "html"},
+	}
+
+	for _, tc := range testCases {
+		t.Run(tc.format, func(t *testing.T) {
+			exporter, err := factory.CreateExporter(tc.format)
+
+			if err != nil {
+				t.Fatalf("Unexpected error for format '%s': %v", tc.format, err)
+			}
+
+			if exporter == nil {
+				t.Fatalf("CreateExporter returned nil for format '%s'", tc.format)
+			}
+
+			supportedFormat := exporter.GetSupportedFormat()
+			if supportedFormat != tc.expectedFormat {
+				t.Errorf("Expected supported format '%s' for format '%s', got '%s'", tc.expectedFormat, tc.format, supportedFormat)
+			}
+		})
+	}
+}
+
+// TestFactory_CreateExporter_ErrorMessages tests error messages for unsupported formats.
+func TestFactory_CreateExporter_ErrorMessages(t *testing.T) {
+	htmlCleaner := services.NewHTMLCleaner()
+	factory := NewFactory(htmlCleaner)
+
+	testCases := []string{
+		"pdf",
+		"txt",
+		"json",
+		"xml",
+		"unknown",
+		"123",
+		"markdown-invalid",
+	}
+
+	for _, format := range testCases {
+		t.Run(format, func(t *testing.T) {
+			exporter, err := factory.CreateExporter(format)
+
+			if err == nil {
+				t.Errorf("Expected error for unsupported format '%s', got nil", format)
+			}
+
+			if exporter != nil {
+				t.Errorf("Expected nil exporter for unsupported format '%s', got %v", format, exporter)
+			}
+
+			// Check error message contains the format
+			if err != nil && !strings.Contains(err.Error(), format) {
+				t.Errorf("Error message should contain the unsupported format '%s', got: %s", format, err.Error())
+			}
+
+			// Check error message has expected prefix
+			if err != nil && !strings.Contains(err.Error(), "unsupported export format") {
+				t.Errorf("Error message should contain 'unsupported export format', got: %s", err.Error())
+			}
+		})
+	}
+}
+
+// TestFactory_GetSupportedFormats tests the GetSupportedFormats method.
+func TestFactory_GetSupportedFormats(t *testing.T) {
+	htmlCleaner := services.NewHTMLCleaner()
+	factory := NewFactory(htmlCleaner)
+
+	formats := factory.GetSupportedFormats()
+
+	if formats == nil {
+		t.Fatal("GetSupportedFormats() returned nil")
+	}
+
+	expected := []string{"markdown", "md", "docx", "word", "html", "htm"}
+
+	// Sort both slices for comparison
+	sort.Strings(formats)
+	sort.Strings(expected)
+
+	if !reflect.DeepEqual(formats, expected) {
+		t.Errorf("Expected formats %v, got %v", expected, formats)
+	}
+
+	// Verify all returned formats can create exporters
+	for _, format := range formats {
+		exporter, err := factory.CreateExporter(format)
+		if err != nil {
+			t.Errorf("Format '%s' from GetSupportedFormats() should be creatable, got error: %v", format, err)
+		}
+		if exporter == nil {
+			t.Errorf("Format '%s' from GetSupportedFormats() should create non-nil exporter", format)
+		}
+	}
+}
+
+// TestFactory_GetSupportedFormats_Immutable tests that the returned slice is safe to modify.
+func TestFactory_GetSupportedFormats_Immutable(t *testing.T) {
+	htmlCleaner := services.NewHTMLCleaner()
+	factory := NewFactory(htmlCleaner)
+
+	// Get formats twice
+	formats1 := factory.GetSupportedFormats()
+	formats2 := factory.GetSupportedFormats()
+
+	// Modify first slice
+	if len(formats1) > 0 {
+		formats1[0] = "modified"
+	}
+
+	// Check that second call returns unmodified data
+	if len(formats2) > 0 && formats2[0] == "modified" {
+		t.Error("GetSupportedFormats() should return independent slices")
+	}
+
+	// Verify original functionality still works
+	formats3 := factory.GetSupportedFormats()
+	if len(formats3) == 0 {
+		t.Error("GetSupportedFormats() should still return formats after modification")
+	}
+}
+
+// TestFactory_ExporterTypes tests that created exporters are of correct types.
+func TestFactory_ExporterTypes(t *testing.T) {
+	htmlCleaner := services.NewHTMLCleaner()
+	factory := NewFactory(htmlCleaner)
+
+	// Test markdown exporter
+	markdownExporter, err := factory.CreateExporter("markdown")
+	if err != nil {
+		t.Fatalf("Failed to create markdown exporter: %v", err)
+	}
+
+	if _, ok := markdownExporter.(*MarkdownExporter); !ok {
+		t.Error("Markdown exporter should be of type *MarkdownExporter")
+	}
+
+	// Test docx exporter
+	docxExporter, err := factory.CreateExporter("docx")
+	if err != nil {
+		t.Fatalf("Failed to create docx exporter: %v", err)
+	}
+
+	if _, ok := docxExporter.(*DocxExporter); !ok {
+		t.Error("DOCX exporter should be of type *DocxExporter")
+	}
+}
+
+// TestFactory_HTMLCleanerPropagation tests that HTMLCleaner is properly passed to exporters.
+func TestFactory_HTMLCleanerPropagation(t *testing.T) {
+	htmlCleaner := services.NewHTMLCleaner()
+	factory := NewFactory(htmlCleaner)
+
+	// Test with markdown exporter
+	markdownExporter, err := factory.CreateExporter("markdown")
+	if err != nil {
+		t.Fatalf("Failed to create markdown exporter: %v", err)
+	}
+
+	markdownImpl, ok := markdownExporter.(*MarkdownExporter)
+	if !ok {
+		t.Fatal("Failed to cast to MarkdownExporter")
+	}
+
+	if markdownImpl.htmlCleaner == nil {
+		t.Error("HTMLCleaner should be propagated to MarkdownExporter")
+	}
+
+	// Test with docx exporter
+	docxExporter, err := factory.CreateExporter("docx")
+	if err != nil {
+		t.Fatalf("Failed to create docx exporter: %v", err)
+	}
+
+	docxImpl, ok := docxExporter.(*DocxExporter)
+	if !ok {
+		t.Fatal("Failed to cast to DocxExporter")
+	}
+
+	if docxImpl.htmlCleaner == nil {
+		t.Error("HTMLCleaner should be propagated to DocxExporter")
+	}
+
+	// Test with html exporter
+	htmlExporter, err := factory.CreateExporter("html")
+	if err != nil {
+		t.Fatalf("Failed to create html exporter: %v", err)
+	}
+
+	htmlImpl, ok := htmlExporter.(*HTMLExporter)
+	if !ok {
+		t.Fatal("Failed to cast to HTMLExporter")
+	}
+
+	if htmlImpl.htmlCleaner == nil {
+		t.Error("HTMLCleaner should be propagated to HTMLExporter")
+	}
+}
+
+// TestFactory_MultipleExporterCreation tests creating multiple exporters of same type.
+func TestFactory_MultipleExporterCreation(t *testing.T) {
+	htmlCleaner := services.NewHTMLCleaner()
+	factory := NewFactory(htmlCleaner)
+
+	// Create multiple markdown exporters
+	exporter1, err := factory.CreateExporter("markdown")
+	if err != nil {
+		t.Fatalf("Failed to create first markdown exporter: %v", err)
+	}
+
+	exporter2, err := factory.CreateExporter("md")
+	if err != nil {
+		t.Fatalf("Failed to create second markdown exporter: %v", err)
+	}
+
+	// They should be different instances
+	if exporter1 == exporter2 {
+		t.Error("Factory should create independent exporter instances")
+	}
+
+	// But both should be MarkdownExporter type
+	if _, ok := exporter1.(*MarkdownExporter); !ok {
+		t.Error("First exporter should be MarkdownExporter")
+	}
+
+	if _, ok := exporter2.(*MarkdownExporter); !ok {
+		t.Error("Second exporter should be MarkdownExporter")
+	}
+}
+
+// TestFactory_WithNilHTMLCleaner tests factory behavior with nil HTMLCleaner.
+func TestFactory_WithNilHTMLCleaner(t *testing.T) {
+	// This tests edge case - should not panic but behavior may vary
+	defer func() {
+		if r := recover(); r != nil {
+			t.Errorf("Factory should handle nil HTMLCleaner gracefully, but panicked: %v", r)
+		}
+	}()
+
+	factory := NewFactory(nil)
+
+	if factory == nil {
+		t.Fatal("NewFactory(nil) returned nil")
+	}
+
+	// Try to create an exporter - this might fail or succeed depending on implementation
+	_, err := factory.CreateExporter("markdown")
+
+	// We don't assert on the error since nil HTMLCleaner handling is implementation-dependent
+	// The important thing is that it doesn't panic
+	_ = err
+}
+
+// TestFactory_FormatNormalization tests that format strings are properly normalized.
+func TestFactory_FormatNormalization(t *testing.T) {
+	htmlCleaner := services.NewHTMLCleaner()
+	factory := NewFactory(htmlCleaner)
+
+	// Test formats with extra whitespace
+	testCases := []struct {
+		input    string
+		expected string
+	}{
+		{"markdown", "markdown"},
+		{"MARKDOWN", "markdown"},
+		{"Markdown", "markdown"},
+		{"docx", "docx"},
+		{"DOCX", "docx"},
+		{"Docx", "docx"},
+	}
+
+	for _, tc := range testCases {
+		t.Run(tc.input, func(t *testing.T) {
+			exporter, err := factory.CreateExporter(tc.input)
+			if err != nil {
+				t.Fatalf("Failed to create exporter for '%s': %v", tc.input, err)
+			}
+
+			format := exporter.GetSupportedFormat()
+			if format != tc.expected {
+				t.Errorf("Expected format '%s' for input '%s', got '%s'", tc.expected, tc.input, format)
+			}
+		})
+	}
+}
+
+// BenchmarkFactory_CreateExporter benchmarks the CreateExporter method.
+func BenchmarkFactory_CreateExporter(b *testing.B) {
+	htmlCleaner := services.NewHTMLCleaner()
+	factory := NewFactory(htmlCleaner)
+
+	b.ResetTimer()
+	for i := 0; i < b.N; i++ {
+		_, _ = factory.CreateExporter("markdown")
+	}
+}
+
+// BenchmarkFactory_CreateExporter_Docx benchmarks creating DOCX exporters.
+func BenchmarkFactory_CreateExporter_Docx(b *testing.B) {
+	htmlCleaner := services.NewHTMLCleaner()
+	factory := NewFactory(htmlCleaner)
+
+	b.ResetTimer()
+	for i := 0; i < b.N; i++ {
+		_, _ = factory.CreateExporter("docx")
+	}
+}
+
+// BenchmarkFactory_GetSupportedFormats benchmarks the GetSupportedFormats method.
+func BenchmarkFactory_GetSupportedFormats(b *testing.B) {
+	htmlCleaner := services.NewHTMLCleaner()
+	factory := NewFactory(htmlCleaner)
+
+	b.ResetTimer()
+	for i := 0; i < b.N; i++ {
+		_ = factory.GetSupportedFormats()
+	}
+}

internal/exporters/html.go

@@ -0,0 +1,476 @@
+// Package exporters provides implementations of the Exporter interface
+// for converting Articulate Rise courses into various file formats.
+package exporters
+
+import (
+	"bytes"
+	"fmt"
+	"html"
+	"os"
+	"strings"
+
+	"github.com/kjanat/articulate-parser/internal/interfaces"
+	"github.com/kjanat/articulate-parser/internal/models"
+	"github.com/kjanat/articulate-parser/internal/services"
+)
+
+// HTMLExporter implements the Exporter interface for HTML format.
+// It converts Articulate Rise course data into a structured HTML document.
+type HTMLExporter struct {
+	// htmlCleaner is used to convert HTML content to plain text when needed
+	htmlCleaner *services.HTMLCleaner
+}
+
+// NewHTMLExporter creates a new HTMLExporter instance.
+// It takes an HTMLCleaner to handle HTML content conversion when plain text is needed.
+//
+// Parameters:
+//   - htmlCleaner: Service for cleaning HTML content in course data
+//
+// Returns:
+//   - An implementation of the Exporter interface for HTML format
+func NewHTMLExporter(htmlCleaner *services.HTMLCleaner) interfaces.Exporter {
+	return &HTMLExporter{
+		htmlCleaner: htmlCleaner,
+	}
+}
+
+// Export exports a course to HTML format.
+// It generates a structured HTML document from the course data
+// and writes it to the specified output path.
+//
+// Parameters:
+//   - course: The course data model to export
+//   - outputPath: The file path where the HTML content will be written
+//
+// Returns:
+//   - An error if writing to the output file fails
+func (e *HTMLExporter) Export(course *models.Course, outputPath string) error {
+	var buf bytes.Buffer
+
+	// Write HTML document structure
+	buf.WriteString("<!DOCTYPE html>\n")
+	buf.WriteString("<html lang=\"en\">\n")
+	buf.WriteString("<head>\n")
+	buf.WriteString("    <meta charset=\"UTF-8\">\n")
+	buf.WriteString("    <meta name=\"viewport\" content=\"width=device-width, initial-scale=1.0\">\n")
+	buf.WriteString(fmt.Sprintf("    <title>%s</title>\n", html.EscapeString(course.Course.Title)))
+	buf.WriteString("    <style>\n")
+	buf.WriteString(e.getDefaultCSS())
+	buf.WriteString("    </style>\n")
+	buf.WriteString("</head>\n")
+	buf.WriteString("<body>\n")
+
+	// Write course header
+	buf.WriteString(fmt.Sprintf("    <header>\n        <h1>%s</h1>\n", html.EscapeString(course.Course.Title)))
+
+	if course.Course.Description != "" {
+		buf.WriteString(fmt.Sprintf("        <div class=\"course-description\">%s</div>\n", course.Course.Description))
+	}
+	buf.WriteString("    </header>\n\n")
+
+	// Add metadata section
+	buf.WriteString("    <section class=\"course-info\">\n")
+	buf.WriteString("        <h2>Course Information</h2>\n")
+	buf.WriteString("        <ul>\n")
+	buf.WriteString(fmt.Sprintf("            <li><strong>Course ID:</strong> %s</li>\n", html.EscapeString(course.Course.ID)))
+	buf.WriteString(fmt.Sprintf("            <li><strong>Share ID:</strong> %s</li>\n", html.EscapeString(course.ShareID)))
+	buf.WriteString(fmt.Sprintf("            <li><strong>Navigation Mode:</strong> %s</li>\n", html.EscapeString(course.Course.NavigationMode)))
+	if course.Course.ExportSettings != nil {
+		buf.WriteString(fmt.Sprintf("            <li><strong>Export Format:</strong> %s</li>\n", html.EscapeString(course.Course.ExportSettings.Format)))
+	}
+	buf.WriteString("        </ul>\n")
+	buf.WriteString("    </section>\n\n")
+
+	// Process lessons
+	lessonCounter := 0
+	for _, lesson := range course.Course.Lessons {
+		if lesson.Type == "section" {
+			buf.WriteString(fmt.Sprintf("    <section class=\"course-section\">\n        <h2>%s</h2>\n    </section>\n\n", html.EscapeString(lesson.Title)))
+			continue
+		}
+
+		lessonCounter++
+		buf.WriteString(fmt.Sprintf("    <section class=\"lesson\">\n        <h3>Lesson %d: %s</h3>\n", lessonCounter, html.EscapeString(lesson.Title)))
+
+		if lesson.Description != "" {
+			buf.WriteString(fmt.Sprintf("        <div class=\"lesson-description\">%s</div>\n", lesson.Description))
+		}
+
+		// Process lesson items
+		for _, item := range lesson.Items {
+			e.processItemToHTML(&buf, item)
+		}
+
+		buf.WriteString("    </section>\n\n")
+	}
+
+	buf.WriteString("</body>\n")
+	buf.WriteString("</html>\n")
+
+	return os.WriteFile(outputPath, buf.Bytes(), 0644)
+}
+
+// GetSupportedFormat returns the format name this exporter supports
+// It indicates the file format that the HTMLExporter can generate.
+//
+// Returns:
+//   - A string representing the supported format ("html")
+func (e *HTMLExporter) GetSupportedFormat() string {
+	return "html"
+}
+
+// getDefaultCSS returns basic CSS styling for the HTML document
+func (e *HTMLExporter) getDefaultCSS() string {
+	return `
+        body {
+            font-family: -apple-system, BlinkMacSystemFont, 'Segoe UI', Roboto, Oxygen, Ubuntu, Cantarell, sans-serif;
+            line-height: 1.6;
+            color: #333;
+            max-width: 800px;
+            margin: 0 auto;
+            padding: 20px;
+            background-color: #f9f9f9;
+        }
+        header {
+            background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
+            color: white;
+            padding: 2rem;
+            border-radius: 10px;
+            margin-bottom: 2rem;
+            box-shadow: 0 4px 6px rgba(0, 0, 0, 0.1);
+        }
+        header h1 {
+            margin: 0;
+            font-size: 2.5rem;
+            font-weight: 300;
+        }
+        .course-description {
+            margin-top: 1rem;
+            font-size: 1.1rem;
+            opacity: 0.9;
+        }
+        .course-info {
+            background: white;
+            padding: 1.5rem;
+            border-radius: 8px;
+            margin-bottom: 2rem;
+            box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
+        }
+        .course-info h2 {
+            margin-top: 0;
+            color: #4a5568;
+            border-bottom: 2px solid #e2e8f0;
+            padding-bottom: 0.5rem;
+        }
+        .course-info ul {
+            list-style: none;
+            padding: 0;
+        }
+        .course-info li {
+            margin: 0.5rem 0;
+            padding: 0.5rem;
+            background: #f7fafc;
+            border-radius: 4px;
+        }
+        .course-section {
+            background: #4299e1;
+            color: white;
+            padding: 1.5rem;
+            border-radius: 8px;
+            margin: 2rem 0;
+            box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
+        }
+        .course-section h2 {
+            margin: 0;
+            font-weight: 400;
+        }
+        .lesson {
+            background: white;
+            padding: 2rem;
+            border-radius: 8px;
+            margin: 2rem 0;
+            box-shadow: 0 2px 4px rgba(0, 0, 0, 0.1);
+            border-left: 4px solid #4299e1;
+        }
+        .lesson h3 {
+            margin-top: 0;
+            color: #2d3748;
+            font-size: 1.5rem;
+        }
+        .lesson-description {
+            margin: 1rem 0;
+            padding: 1rem;
+            background: #f7fafc;
+            border-radius: 4px;
+            border-left: 3px solid #4299e1;
+        }
+        .item {
+            margin: 1.5rem 0;
+            padding: 1rem;
+            border-radius: 6px;
+            background: #fafafa;
+            border: 1px solid #e2e8f0;
+        }
+        .item h4 {
+            margin-top: 0;
+            color: #4a5568;
+            font-size: 1.2rem;
+            text-transform: capitalize;
+        }
+        .text-item {
+            background: #f0fff4;
+            border-left: 3px solid #48bb78;
+        }
+        .list-item {
+            background: #fffaf0;
+            border-left: 3px solid #ed8936;
+        }
+        .knowledge-check {
+            background: #e6fffa;
+            border-left: 3px solid #38b2ac;
+        }
+        .multimedia-item {
+            background: #faf5ff;
+            border-left: 3px solid #9f7aea;
+        }
+        .interactive-item {
+            background: #fff5f5;
+            border-left: 3px solid #f56565;
+        }
+        .unknown-item {
+            background: #f7fafc;
+            border-left: 3px solid #a0aec0;
+        }
+        .answers {
+            margin: 1rem 0;
+        }
+        .answers h5 {
+            margin: 0.5rem 0;
+            color: #4a5568;
+        }
+        .answers ol {
+            margin: 0.5rem 0;
+            padding-left: 1.5rem;
+        }
+        .answers li {
+            margin: 0.3rem 0;
+            padding: 0.3rem;
+        }
+        .correct-answer {
+            background: #c6f6d5;
+            border-radius: 3px;
+            font-weight: bold;
+        }
+        .correct-answer::after {
+            content: " ✓";
+            color: #38a169;
+        }
+        .feedback {
+            margin: 1rem 0;
+            padding: 1rem;
+            background: #edf2f7;
+            border-radius: 4px;
+            border-left: 3px solid #4299e1;
+            font-style: italic;
+        }
+        .media-info {
+            background: #edf2f7;
+            padding: 1rem;
+            border-radius: 4px;
+            margin: 0.5rem 0;
+        }
+        .media-info strong {
+            color: #4a5568;
+        }
+        hr {
+            border: none;
+            height: 2px;
+            background: linear-gradient(to right, #667eea, #764ba2);
+            margin: 2rem 0;
+            border-radius: 1px;
+        }
+        ul {
+            padding-left: 1.5rem;
+        }
+        li {
+            margin: 0.5rem 0;
+        }
+    `
+}
+
+// processItemToHTML converts a course item into HTML format
+// and appends it to the provided buffer. It handles different item types
+// with appropriate HTML formatting.
+//
+// Parameters:
+//   - buf: The buffer to write the HTML content to
+//   - item: The course item to process
+func (e *HTMLExporter) processItemToHTML(buf *bytes.Buffer, item models.Item) {
+	switch strings.ToLower(item.Type) {
+	case "text":
+		e.processTextItem(buf, item)
+	case "list":
+		e.processListItem(buf, item)
+	case "knowledgecheck":
+		e.processKnowledgeCheckItem(buf, item)
+	case "multimedia":
+		e.processMultimediaItem(buf, item)
+	case "image":
+		e.processImageItem(buf, item)
+	case "interactive":
+		e.processInteractiveItem(buf, item)
+	case "divider":
+		e.processDividerItem(buf)
+	default:
+		e.processUnknownItem(buf, item)
+	}
+}
+
+// processTextItem handles text content with headings and paragraphs
+func (e *HTMLExporter) processTextItem(buf *bytes.Buffer, item models.Item) {
+	buf.WriteString("        <div class=\"item text-item\">\n")
+	buf.WriteString("            <h4>Text Content</h4>\n")
+	for _, subItem := range item.Items {
+		if subItem.Heading != "" {
+			buf.WriteString(fmt.Sprintf("            <h5>%s</h5>\n", subItem.Heading))
+		}
+		if subItem.Paragraph != "" {
+			buf.WriteString(fmt.Sprintf("            <div>%s</div>\n", subItem.Paragraph))
+		}
+	}
+	buf.WriteString("        </div>\n\n")
+}
+
+// processListItem handles list content
+func (e *HTMLExporter) processListItem(buf *bytes.Buffer, item models.Item) {
+	buf.WriteString("        <div class=\"item list-item\">\n")
+	buf.WriteString("            <h4>List</h4>\n")
+	buf.WriteString("            <ul>\n")
+	for _, subItem := range item.Items {
+		if subItem.Paragraph != "" {
+			cleanText := e.htmlCleaner.CleanHTML(subItem.Paragraph)
+			buf.WriteString(fmt.Sprintf("                <li>%s</li>\n", html.EscapeString(cleanText)))
+		}
+	}
+	buf.WriteString("            </ul>\n")
+	buf.WriteString("        </div>\n\n")
+}
+
+// processKnowledgeCheckItem handles quiz questions and answers
+func (e *HTMLExporter) processKnowledgeCheckItem(buf *bytes.Buffer, item models.Item) {
+	buf.WriteString("        <div class=\"item knowledge-check\">\n")
+	buf.WriteString("            <h4>Knowledge Check</h4>\n")
+	for _, subItem := range item.Items {
+		if subItem.Title != "" {
+			buf.WriteString(fmt.Sprintf("            <p><strong>Question:</strong> %s</p>\n", subItem.Title))
+		}
+		if len(subItem.Answers) > 0 {
+			e.processAnswers(buf, subItem.Answers)
+		}
+		if subItem.Feedback != "" {
+			buf.WriteString(fmt.Sprintf("            <div class=\"feedback\"><strong>Feedback:</strong> %s</div>\n", subItem.Feedback))
+		}
+	}
+	buf.WriteString("        </div>\n\n")
+}
+
+// processMultimediaItem handles multimedia content like videos
+func (e *HTMLExporter) processMultimediaItem(buf *bytes.Buffer, item models.Item) {
+	buf.WriteString("        <div class=\"item multimedia-item\">\n")
+	buf.WriteString("            <h4>Media Content</h4>\n")
+	for _, subItem := range item.Items {
+		if subItem.Title != "" {
+			buf.WriteString(fmt.Sprintf("            <h5>%s</h5>\n", subItem.Title))
+		}
+		if subItem.Media != nil {
+			if subItem.Media.Video != nil {
+				buf.WriteString("            <div class=\"media-info\">\n")
+				buf.WriteString(fmt.Sprintf("                <p><strong>Video:</strong> %s</p>\n", html.EscapeString(subItem.Media.Video.OriginalUrl)))
+				if subItem.Media.Video.Duration > 0 {
+					buf.WriteString(fmt.Sprintf("                <p><strong>Duration:</strong> %d seconds</p>\n", subItem.Media.Video.Duration))
+				}
+				buf.WriteString("            </div>\n")
+			}
+		}
+		if subItem.Caption != "" {
+			buf.WriteString(fmt.Sprintf("            <div><em>%s</em></div>\n", subItem.Caption))
+		}
+	}
+	buf.WriteString("        </div>\n\n")
+}
+
+// processImageItem handles image content
+func (e *HTMLExporter) processImageItem(buf *bytes.Buffer, item models.Item) {
+	buf.WriteString("        <div class=\"item multimedia-item\">\n")
+	buf.WriteString("            <h4>Image</h4>\n")
+	for _, subItem := range item.Items {
+		if subItem.Media != nil && subItem.Media.Image != nil {
+			buf.WriteString("            <div class=\"media-info\">\n")
+			buf.WriteString(fmt.Sprintf("                <p><strong>Image:</strong> %s</p>\n", html.EscapeString(subItem.Media.Image.OriginalUrl)))
+			buf.WriteString("            </div>\n")
+		}
+		if subItem.Caption != "" {
+			buf.WriteString(fmt.Sprintf("            <div><em>%s</em></div>\n", subItem.Caption))
+		}
+	}
+	buf.WriteString("        </div>\n\n")
+}
+
+// processInteractiveItem handles interactive content
+func (e *HTMLExporter) processInteractiveItem(buf *bytes.Buffer, item models.Item) {
+	buf.WriteString("        <div class=\"item interactive-item\">\n")
+	buf.WriteString("            <h4>Interactive Content</h4>\n")
+	for _, subItem := range item.Items {
+		if subItem.Title != "" {
+			buf.WriteString(fmt.Sprintf("            <p><strong>%s</strong></p>\n", subItem.Title))
+		}
+		if subItem.Paragraph != "" {
+			buf.WriteString(fmt.Sprintf("            <div>%s</div>\n", subItem.Paragraph))
+		}
+	}
+	buf.WriteString("        </div>\n\n")
+}
+
+// processDividerItem handles divider elements
+func (e *HTMLExporter) processDividerItem(buf *bytes.Buffer) {
+	buf.WriteString("        <hr>\n\n")
+}
+
+// processUnknownItem handles unknown or unsupported item types
+func (e *HTMLExporter) processUnknownItem(buf *bytes.Buffer, item models.Item) {
+	if len(item.Items) > 0 {
+		buf.WriteString("        <div class=\"item unknown-item\">\n")
+		buf.WriteString(fmt.Sprintf("            <h4>%s Content</h4>\n", strings.Title(item.Type)))
+		for _, subItem := range item.Items {
+			e.processGenericSubItem(buf, subItem)
+		}
+		buf.WriteString("        </div>\n\n")
+	}
+}
+
+// processGenericSubItem processes sub-items for unknown types
+func (e *HTMLExporter) processGenericSubItem(buf *bytes.Buffer, subItem models.SubItem) {
+	if subItem.Title != "" {
+		buf.WriteString(fmt.Sprintf("            <p><strong>%s</strong></p>\n", subItem.Title))
+	}
+	if subItem.Paragraph != "" {
+		buf.WriteString(fmt.Sprintf("            <div>%s</div>\n", subItem.Paragraph))
+	}
+}
+
+// processAnswers processes answer choices for quiz questions
+func (e *HTMLExporter) processAnswers(buf *bytes.Buffer, answers []models.Answer) {
+	buf.WriteString("            <div class=\"answers\">\n")
+	buf.WriteString("                <h5>Answers:</h5>\n")
+	buf.WriteString("                <ol>\n")
+	for _, answer := range answers {
+		cssClass := ""
+		if answer.Correct {
+			cssClass = " class=\"correct-answer\""
+		}
+		buf.WriteString(fmt.Sprintf("                    <li%s>%s</li>\n", cssClass, html.EscapeString(answer.Title)))
+	}
+	buf.WriteString("                </ol>\n")
+	buf.WriteString("            </div>\n")
+}

internal/exporters/html_test.go

@@ -0,0 +1,927 @@
+// Package exporters_test provides tests for the html exporter.
+package exporters
+
+import (
+	"bytes"
+	"os"
+	"path/filepath"
+	"strings"
+	"testing"
+
+	"github.com/kjanat/articulate-parser/internal/models"
+	"github.com/kjanat/articulate-parser/internal/services"
+)
+
+// TestNewHTMLExporter tests the NewHTMLExporter constructor.
+func TestNewHTMLExporter(t *testing.T) {
+	htmlCleaner := services.NewHTMLCleaner()
+	exporter := NewHTMLExporter(htmlCleaner)
+
+	if exporter == nil {
+		t.Fatal("NewHTMLExporter() returned nil")
+	}
+
+	// Type assertion to check internal structure
+	htmlExporter, ok := exporter.(*HTMLExporter)
+	if !ok {
+		t.Fatal("NewHTMLExporter() returned wrong type")
+	}
+
+	if htmlExporter.htmlCleaner == nil {
+		t.Error("htmlCleaner should not be nil")
+	}
+}
+
+// TestHTMLExporter_GetSupportedFormat tests the GetSupportedFormat method.
+func TestHTMLExporter_GetSupportedFormat(t *testing.T) {
+	htmlCleaner := services.NewHTMLCleaner()
+	exporter := NewHTMLExporter(htmlCleaner)
+
+	expected := "html"
+	result := exporter.GetSupportedFormat()
+
+	if result != expected {
+		t.Errorf("Expected format '%s', got '%s'", expected, result)
+	}
+}
+
+// TestHTMLExporter_Export tests the Export method.
+func TestHTMLExporter_Export(t *testing.T) {
+	htmlCleaner := services.NewHTMLCleaner()
+	exporter := NewHTMLExporter(htmlCleaner)
+
+	// Create test course
+	testCourse := createTestCourseForHTML()
+
+	// Create temporary directory and file
+	tempDir := t.TempDir()
+	outputPath := filepath.Join(tempDir, "test-course.html")
+
+	// Test successful export
+	err := exporter.Export(testCourse, outputPath)
+	if err != nil {
+		t.Fatalf("Export failed: %v", err)
+	}
+
+	// Check that file was created
+	if _, err := os.Stat(outputPath); os.IsNotExist(err) {
+		t.Fatal("Output file was not created")
+	}
+
+	// Read and verify content
+	content, err := os.ReadFile(outputPath)
+	if err != nil {
+		t.Fatalf("Failed to read output file: %v", err)
+	}
+
+	contentStr := string(content)
+
+	// Verify HTML structure
+	if !strings.Contains(contentStr, "<!DOCTYPE html>") {
+		t.Error("Output should contain HTML doctype")
+	}
+
+	if !strings.Contains(contentStr, "<html lang=\"en\">") {
+		t.Error("Output should contain HTML tag with lang attribute")
+	}
+
+	if !strings.Contains(contentStr, "<title>Test Course</title>") {
+		t.Error("Output should contain course title in head")
+	}
+
+	// Verify main course title
+	if !strings.Contains(contentStr, "<h1>Test Course</h1>") {
+		t.Error("Output should contain course title as main heading")
+	}
+
+	// Verify course information section
+	if !strings.Contains(contentStr, "Course Information") {
+		t.Error("Output should contain course information section")
+	}
+
+	// Verify course metadata
+	if !strings.Contains(contentStr, "Course ID") {
+		t.Error("Output should contain course ID")
+	}
+
+	if !strings.Contains(contentStr, "Share ID") {
+		t.Error("Output should contain share ID")
+	}
+
+	// Verify lesson content
+	if !strings.Contains(contentStr, "Lesson 1: Test Lesson") {
+		t.Error("Output should contain lesson heading")
+	}
+
+	// Verify CSS is included
+	if !strings.Contains(contentStr, "<style>") {
+		t.Error("Output should contain CSS styles")
+	}
+
+	if !strings.Contains(contentStr, "font-family") {
+		t.Error("Output should contain CSS font-family")
+	}
+}
+
+// TestHTMLExporter_Export_InvalidPath tests export with invalid output path.
+func TestHTMLExporter_Export_InvalidPath(t *testing.T) {
+	htmlCleaner := services.NewHTMLCleaner()
+	exporter := NewHTMLExporter(htmlCleaner)
+
+	testCourse := createTestCourseForHTML()
+
+	// Try to export to invalid path (non-existent directory)
+	invalidPath := "/non/existent/path/test.html"
+	err := exporter.Export(testCourse, invalidPath)
+
+	if err == nil {
+		t.Error("Expected error for invalid output path, but got nil")
+	}
+}
+
+// TestHTMLExporter_ProcessTextItem tests the processTextItem method.
+func TestHTMLExporter_ProcessTextItem(t *testing.T) {
+	htmlCleaner := services.NewHTMLCleaner()
+	exporter := &HTMLExporter{htmlCleaner: htmlCleaner}
+
+	var buf bytes.Buffer
+	item := models.Item{
+		Type: "text",
+		Items: []models.SubItem{
+			{
+				Heading:   "<h1>Test Heading</h1>",
+				Paragraph: "<p>Test paragraph with <strong>bold</strong> text.</p>",
+			},
+			{
+				Paragraph: "<p>Another paragraph.</p>",
+			},
+		},
+	}
+
+	exporter.processTextItem(&buf, item)
+
+	result := buf.String()
+
+	if !strings.Contains(result, "text-item") {
+		t.Error("Should contain text-item CSS class")
+	}
+	if !strings.Contains(result, "Text Content") {
+		t.Error("Should contain text content heading")
+	}
+	if !strings.Contains(result, "<h1>Test Heading</h1>") {
+		t.Error("Should preserve HTML heading")
+	}
+	if !strings.Contains(result, "<strong>bold</strong>") {
+		t.Error("Should preserve HTML formatting in paragraph")
+	}
+}
+
+// TestHTMLExporter_ProcessListItem tests the processListItem method.
+func TestHTMLExporter_ProcessListItem(t *testing.T) {
+	htmlCleaner := services.NewHTMLCleaner()
+	exporter := &HTMLExporter{htmlCleaner: htmlCleaner}
+
+	var buf bytes.Buffer
+	item := models.Item{
+		Type: "list",
+		Items: []models.SubItem{
+			{Paragraph: "<p>First item</p>"},
+			{Paragraph: "<p>Second item with <em>emphasis</em></p>"},
+			{Paragraph: "<p>Third item</p>"},
+		},
+	}
+
+	exporter.processListItem(&buf, item)
+
+	result := buf.String()
+
+	if !strings.Contains(result, "list-item") {
+		t.Error("Should contain list-item CSS class")
+	}
+	if !strings.Contains(result, "<ul>") {
+		t.Error("Should contain unordered list")
+	}
+	if !strings.Contains(result, "<li>First item</li>") {
+		t.Error("Should contain first list item")
+	}
+	if !strings.Contains(result, "<li>Second item with emphasis</li>") {
+		t.Error("Should contain second list item with cleaned HTML")
+	}
+	if !strings.Contains(result, "<li>Third item</li>") {
+		t.Error("Should contain third list item")
+	}
+}
+
+// TestHTMLExporter_ProcessKnowledgeCheckItem tests the processKnowledgeCheckItem method.
+func TestHTMLExporter_ProcessKnowledgeCheckItem(t *testing.T) {
+	htmlCleaner := services.NewHTMLCleaner()
+	exporter := &HTMLExporter{htmlCleaner: htmlCleaner}
+
+	var buf bytes.Buffer
+	item := models.Item{
+		Type: "knowledgeCheck",
+		Items: []models.SubItem{
+			{
+				Title: "<p>What is the correct answer?</p>",
+				Answers: []models.Answer{
+					{Title: "Wrong answer", Correct: false},
+					{Title: "Correct answer", Correct: true},
+					{Title: "Another wrong answer", Correct: false},
+				},
+				Feedback: "<p>Great job! This is the feedback.</p>",
+			},
+		},
+	}
+
+	exporter.processKnowledgeCheckItem(&buf, item)
+
+	result := buf.String()
+
+	if !strings.Contains(result, "knowledge-check") {
+		t.Error("Should contain knowledge-check CSS class")
+	}
+	if !strings.Contains(result, "Knowledge Check") {
+		t.Error("Should contain knowledge check heading")
+	}
+	if !strings.Contains(result, "What is the correct answer?") {
+		t.Error("Should contain question text")
+	}
+	if !strings.Contains(result, "Wrong answer") {
+		t.Error("Should contain first answer")
+	}
+	if !strings.Contains(result, "correct-answer") {
+		t.Error("Should mark correct answer with CSS class")
+	}
+	if !strings.Contains(result, "Feedback") {
+		t.Error("Should contain feedback section")
+	}
+}
+
+// TestHTMLExporter_ProcessMultimediaItem tests the processMultimediaItem method.
+func TestHTMLExporter_ProcessMultimediaItem(t *testing.T) {
+	htmlCleaner := services.NewHTMLCleaner()
+	exporter := &HTMLExporter{htmlCleaner: htmlCleaner}
+
+	var buf bytes.Buffer
+	item := models.Item{
+		Type: "multimedia",
+		Items: []models.SubItem{
+			{
+				Title: "<p>Video Title</p>",
+				Media: &models.Media{
+					Video: &models.VideoMedia{
+						OriginalUrl: "https://example.com/video.mp4",
+						Duration:    120,
+					},
+				},
+				Caption: "<p>Video caption</p>",
+			},
+		},
+	}
+
+	exporter.processMultimediaItem(&buf, item)
+
+	result := buf.String()
+
+	if !strings.Contains(result, "multimedia-item") {
+		t.Error("Should contain multimedia-item CSS class")
+	}
+	if !strings.Contains(result, "Media Content") {
+		t.Error("Should contain media content heading")
+	}
+	if !strings.Contains(result, "Video Title") {
+		t.Error("Should contain video title")
+	}
+	if !strings.Contains(result, "https://example.com/video.mp4") {
+		t.Error("Should contain video URL")
+	}
+	if !strings.Contains(result, "120 seconds") {
+		t.Error("Should contain video duration")
+	}
+	if !strings.Contains(result, "Video caption") {
+		t.Error("Should contain video caption")
+	}
+}
+
+// TestHTMLExporter_ProcessImageItem tests the processImageItem method.
+func TestHTMLExporter_ProcessImageItem(t *testing.T) {
+	htmlCleaner := services.NewHTMLCleaner()
+	exporter := &HTMLExporter{htmlCleaner: htmlCleaner}
+
+	var buf bytes.Buffer
+	item := models.Item{
+		Type: "image",
+		Items: []models.SubItem{
+			{
+				Media: &models.Media{
+					Image: &models.ImageMedia{
+						OriginalUrl: "https://example.com/image.png",
+					},
+				},
+				Caption: "<p>Image caption</p>",
+			},
+		},
+	}
+
+	exporter.processImageItem(&buf, item)
+
+	result := buf.String()
+
+	if !strings.Contains(result, "multimedia-item") {
+		t.Error("Should contain multimedia-item CSS class")
+	}
+	if !strings.Contains(result, "Image") {
+		t.Error("Should contain image heading")
+	}
+	if !strings.Contains(result, "https://example.com/image.png") {
+		t.Error("Should contain image URL")
+	}
+	if !strings.Contains(result, "Image caption") {
+		t.Error("Should contain image caption")
+	}
+}
+
+// TestHTMLExporter_ProcessInteractiveItem tests the processInteractiveItem method.
+func TestHTMLExporter_ProcessInteractiveItem(t *testing.T) {
+	htmlCleaner := services.NewHTMLCleaner()
+	exporter := &HTMLExporter{htmlCleaner: htmlCleaner}
+
+	var buf bytes.Buffer
+	item := models.Item{
+		Type: "interactive",
+		Items: []models.SubItem{
+			{
+				Title:     "<p>Interactive element title</p>",
+				Paragraph: "<p>Interactive content description</p>",
+			},
+		},
+	}
+
+	exporter.processInteractiveItem(&buf, item)
+
+	result := buf.String()
+
+	if !strings.Contains(result, "interactive-item") {
+		t.Error("Should contain interactive-item CSS class")
+	}
+	if !strings.Contains(result, "Interactive Content") {
+		t.Error("Should contain interactive content heading")
+	}
+	if !strings.Contains(result, "Interactive element title") {
+		t.Error("Should contain interactive element title")
+	}
+	if !strings.Contains(result, "Interactive content description") {
+		t.Error("Should contain interactive content description")
+	}
+}
+
+// TestHTMLExporter_ProcessDividerItem tests the processDividerItem method.
+func TestHTMLExporter_ProcessDividerItem(t *testing.T) {
+	htmlCleaner := services.NewHTMLCleaner()
+	exporter := &HTMLExporter{htmlCleaner: htmlCleaner}
+
+	var buf bytes.Buffer
+	exporter.processDividerItem(&buf)
+
+	result := buf.String()
+	expected := "        <hr>\n\n"
+
+	if result != expected {
+		t.Errorf("Expected %q, got %q", expected, result)
+	}
+}
+
+// TestHTMLExporter_ProcessUnknownItem tests the processUnknownItem method.
+func TestHTMLExporter_ProcessUnknownItem(t *testing.T) {
+	htmlCleaner := services.NewHTMLCleaner()
+	exporter := &HTMLExporter{htmlCleaner: htmlCleaner}
+
+	var buf bytes.Buffer
+	item := models.Item{
+		Type: "unknown",
+		Items: []models.SubItem{
+			{
+				Title:     "<p>Unknown item title</p>",
+				Paragraph: "<p>Unknown item content</p>",
+			},
+		},
+	}
+
+	exporter.processUnknownItem(&buf, item)
+
+	result := buf.String()
+
+	if !strings.Contains(result, "unknown-item") {
+		t.Error("Should contain unknown-item CSS class")
+	}
+	if !strings.Contains(result, "Unknown Content") {
+		t.Error("Should contain unknown content heading")
+	}
+	if !strings.Contains(result, "Unknown item title") {
+		t.Error("Should contain unknown item title")
+	}
+	if !strings.Contains(result, "Unknown item content") {
+		t.Error("Should contain unknown item content")
+	}
+}
+
+// TestHTMLExporter_ProcessAnswers tests the processAnswers method.
+func TestHTMLExporter_ProcessAnswers(t *testing.T) {
+	htmlCleaner := services.NewHTMLCleaner()
+	exporter := &HTMLExporter{htmlCleaner: htmlCleaner}
+
+	var buf bytes.Buffer
+	answers := []models.Answer{
+		{Title: "Answer 1", Correct: false},
+		{Title: "Answer 2", Correct: true},
+		{Title: "Answer 3", Correct: false},
+	}
+
+	exporter.processAnswers(&buf, answers)
+
+	result := buf.String()
+
+	if !strings.Contains(result, "answers") {
+		t.Error("Should contain answers CSS class")
+	}
+	if !strings.Contains(result, "<h5>Answers:</h5>") {
+		t.Error("Should contain answers heading")
+	}
+	if !strings.Contains(result, "<ol>") {
+		t.Error("Should contain ordered list")
+	}
+	if !strings.Contains(result, "<li>Answer 1</li>") {
+		t.Error("Should contain first answer")
+	}
+	if !strings.Contains(result, "correct-answer") {
+		t.Error("Should mark correct answer with CSS class")
+	}
+	if !strings.Contains(result, "<li class=\"correct-answer\">Answer 2</li>") {
+		t.Error("Should mark correct answer properly")
+	}
+	if !strings.Contains(result, "<li>Answer 3</li>") {
+		t.Error("Should contain third answer")
+	}
+}
+
+// TestHTMLExporter_ProcessItemToHTML_AllTypes tests all item types.
+func TestHTMLExporter_ProcessItemToHTML_AllTypes(t *testing.T) {
+	htmlCleaner := services.NewHTMLCleaner()
+	exporter := &HTMLExporter{htmlCleaner: htmlCleaner}
+
+	tests := []struct {
+		name         string
+		itemType     string
+		expectedText string
+	}{
+		{
+			name:         "text item",
+			itemType:     "text",
+			expectedText: "Text Content",
+		},
+		{
+			name:         "list item",
+			itemType:     "list",
+			expectedText: "List",
+		},
+		{
+			name:         "knowledge check item",
+			itemType:     "knowledgeCheck",
+			expectedText: "Knowledge Check",
+		},
+		{
+			name:         "multimedia item",
+			itemType:     "multimedia",
+			expectedText: "Media Content",
+		},
+		{
+			name:         "image item",
+			itemType:     "image",
+			expectedText: "Image",
+		},
+		{
+			name:         "interactive item",
+			itemType:     "interactive",
+			expectedText: "Interactive Content",
+		},
+		{
+			name:         "divider item",
+			itemType:     "divider",
+			expectedText: "<hr>",
+		},
+		{
+			name:         "unknown item",
+			itemType:     "unknown",
+			expectedText: "Unknown Content",
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			var buf bytes.Buffer
+			item := models.Item{
+				Type: tt.itemType,
+				Items: []models.SubItem{
+					{Title: "Test title", Paragraph: "Test content"},
+				},
+			}
+
+			// Handle empty unknown items
+			if tt.itemType == "unknown" && tt.expectedText == "" {
+				item.Items = []models.SubItem{}
+			}
+
+			exporter.processItemToHTML(&buf, item)
+
+			result := buf.String()
+			if tt.expectedText != "" && !strings.Contains(result, tt.expectedText) {
+				t.Errorf("Expected content to contain: %q\nGot: %q", tt.expectedText, result)
+			}
+		})
+	}
+}
+
+// TestHTMLExporter_ComplexCourse tests export of a complex course structure.
+func TestHTMLExporter_ComplexCourse(t *testing.T) {
+	htmlCleaner := services.NewHTMLCleaner()
+	exporter := NewHTMLExporter(htmlCleaner)
+
+	// Create complex test course
+	course := &models.Course{
+		ShareID: "complex-test-id",
+		Author:  "Test Author",
+		Course: models.CourseInfo{
+			ID:             "complex-course",
+			Title:          "Complex Test Course",
+			Description:    "<p>This is a <strong>complex</strong> course description.</p>",
+			NavigationMode: "menu",
+			ExportSettings: &models.ExportSettings{
+				Format: "scorm",
+			},
+			Lessons: []models.Lesson{
+				{
+					ID:    "section-1",
+					Title: "Course Section",
+					Type:  "section",
+				},
+				{
+					ID:          "lesson-1",
+					Title:       "Introduction Lesson",
+					Type:        "lesson",
+					Description: "<p>Introduction to the course</p>",
+					Items: []models.Item{
+						{
+							Type: "text",
+							Items: []models.SubItem{
+								{
+									Heading:   "<h2>Welcome</h2>",
+									Paragraph: "<p>Welcome to our course!</p>",
+								},
+							},
+						},
+						{
+							Type: "list",
+							Items: []models.SubItem{
+								{Paragraph: "<p>First objective</p>"},
+								{Paragraph: "<p>Second objective</p>"},
+							},
+						},
+						{
+							Type: "knowledgeCheck",
+							Items: []models.SubItem{
+								{
+									Title: "<p>What will you learn?</p>",
+									Answers: []models.Answer{
+										{Title: "Nothing", Correct: false},
+										{Title: "Everything", Correct: true},
+									},
+									Feedback: "<p>Great choice!</p>",
+								},
+							},
+						},
+					},
+				},
+			},
+		},
+	}
+
+	// Create temporary output file
+	tempDir := t.TempDir()
+	outputPath := filepath.Join(tempDir, "complex-course.html")
+
+	// Export course
+	err := exporter.Export(course, outputPath)
+	if err != nil {
+		t.Fatalf("Export failed: %v", err)
+	}
+
+	// Read and verify content
+	content, err := os.ReadFile(outputPath)
+	if err != nil {
+		t.Fatalf("Failed to read output file: %v", err)
+	}
+
+	contentStr := string(content)
+
+	// Verify various elements are present
+	checks := []string{
+		"<title>Complex Test Course</title>",
+		"<h1>Complex Test Course</h1>",
+		"This is a <strong>complex</strong> course description.",
+		"Course Information",
+		"complex-course",
+		"complex-test-id",
+		"menu",
+		"scorm",
+		"Course Section",
+		"Lesson 1: Introduction Lesson",
+		"Introduction to the course",
+		"<h2>Welcome</h2>",
+		"Welcome to our course!",
+		"First objective",
+		"Second objective",
+		"Knowledge Check",
+		"What will you learn?",
+		"Nothing",
+		"Everything",
+		"correct-answer",
+		"Great choice!",
+	}
+
+	for _, check := range checks {
+		if !strings.Contains(contentStr, check) {
+			t.Errorf("Output should contain: %q", check)
+		}
+	}
+
+	// Verify HTML structure
+	structureChecks := []string{
+		"<!DOCTYPE html>",
+		"<html lang=\"en\">",
+		"<head>",
+		"<body>",
+		"</html>",
+		"<style>",
+		"font-family",
+	}
+
+	for _, check := range structureChecks {
+		if !strings.Contains(contentStr, check) {
+			t.Errorf("Output should contain HTML structure element: %q", check)
+		}
+	}
+}
+
+// TestHTMLExporter_EmptyCourse tests export of an empty course.
+func TestHTMLExporter_EmptyCourse(t *testing.T) {
+	htmlCleaner := services.NewHTMLCleaner()
+	exporter := NewHTMLExporter(htmlCleaner)
+
+	// Create minimal course
+	course := &models.Course{
+		ShareID: "empty-id",
+		Course: models.CourseInfo{
+			ID:      "empty-course",
+			Title:   "Empty Course",
+			Lessons: []models.Lesson{},
+		},
+	}
+
+	tempDir := t.TempDir()
+	outputPath := filepath.Join(tempDir, "empty-course.html")
+
+	err := exporter.Export(course, outputPath)
+	if err != nil {
+		t.Fatalf("Export failed: %v", err)
+	}
+
+	// Verify file was created
+	if _, err := os.Stat(outputPath); os.IsNotExist(err) {
+		t.Fatal("Output file was not created")
+	}
+
+	// Read and verify basic structure
+	content, err := os.ReadFile(outputPath)
+	if err != nil {
+		t.Fatalf("Failed to read output file: %v", err)
+	}
+
+	contentStr := string(content)
+
+	// Verify basic HTML structure even for empty course
+	if !strings.Contains(contentStr, "<!DOCTYPE html>") {
+		t.Error("Output should contain HTML doctype")
+	}
+	if !strings.Contains(contentStr, "<title>Empty Course</title>") {
+		t.Error("Output should contain course title")
+	}
+	if !strings.Contains(contentStr, "<h1>Empty Course</h1>") {
+		t.Error("Output should contain course heading")
+	}
+}
+
+// TestHTMLExporter_HTMLCleaning tests that HTML content is properly handled.
+func TestHTMLExporter_HTMLCleaning(t *testing.T) {
+	htmlCleaner := services.NewHTMLCleaner()
+	exporter := NewHTMLExporter(htmlCleaner)
+
+	// Create course with HTML content that needs cleaning in some places
+	course := &models.Course{
+		ShareID: "html-test-id",
+		Course: models.CourseInfo{
+			ID:          "html-test-course",
+			Title:       "HTML Test Course",
+			Description: "<p>Description with <script>alert('xss')</script> and <b>bold</b> text.</p>",
+			Lessons: []models.Lesson{
+				{
+					ID:          "lesson-1",
+					Title:       "Test Lesson",
+					Type:        "lesson",
+					Description: "<div>Lesson description with <span style='color:red'>styled</span> content.</div>",
+					Items: []models.Item{
+						{
+							Type: "text",
+							Items: []models.SubItem{
+								{
+									Heading:   "<h1>Heading with <em>emphasis</em> and &amp; entities</h1>",
+									Paragraph: "<p>Paragraph with &lt;code&gt; entities and <strong>formatting</strong>.</p>",
+								},
+							},
+						},
+					},
+				},
+			},
+		},
+	}
+
+	tempDir := t.TempDir()
+	outputPath := filepath.Join(tempDir, "html-test.html")
+
+	err := exporter.Export(course, outputPath)
+	if err != nil {
+		t.Fatalf("Export failed: %v", err)
+	}
+
+	// Verify file was created (basic check that HTML handling didn't break export)
+	if _, err := os.Stat(outputPath); os.IsNotExist(err) {
+		t.Fatal("Output file was not created")
+	}
+
+	// Read content and verify some HTML is preserved (descriptions, headings, paragraphs)
+	// while list items are cleaned for safety
+	content, err := os.ReadFile(outputPath)
+	if err != nil {
+		t.Fatalf("Failed to read output file: %v", err)
+	}
+
+	contentStr := string(content)
+
+	// HTML should be preserved in some places
+	if !strings.Contains(contentStr, "<b>bold</b>") {
+		t.Error("Should preserve HTML formatting in descriptions")
+	}
+	if !strings.Contains(contentStr, "<h1>Heading with <em>emphasis</em>") {
+		t.Error("Should preserve HTML in headings")
+	}
+	if !strings.Contains(contentStr, "<strong>formatting</strong>") {
+		t.Error("Should preserve HTML in paragraphs")
+	}
+}
+
+// createTestCourseForHTML creates a test course for HTML export testing.
+func createTestCourseForHTML() *models.Course {
+	return &models.Course{
+		ShareID: "test-share-id",
+		Course: models.CourseInfo{
+			ID:             "test-course-id",
+			Title:          "Test Course",
+			Description:    "<p>Test course description with <strong>formatting</strong>.</p>",
+			NavigationMode: "free",
+			Lessons: []models.Lesson{
+				{
+					ID:    "section-1",
+					Title: "Test Section",
+					Type:  "section",
+				},
+				{
+					ID:          "lesson-1",
+					Title:       "Test Lesson",
+					Type:        "lesson",
+					Description: "<p>Test lesson description</p>",
+					Items: []models.Item{
+						{
+							Type: "text",
+							Items: []models.SubItem{
+								{
+									Heading:   "<h2>Test Heading</h2>",
+									Paragraph: "<p>Test paragraph content.</p>",
+								},
+							},
+						},
+						{
+							Type: "list",
+							Items: []models.SubItem{
+								{Paragraph: "<p>First list item</p>"},
+								{Paragraph: "<p>Second list item</p>"},
+							},
+						},
+					},
+				},
+			},
+		},
+	}
+}
+
+// BenchmarkHTMLExporter_Export benchmarks the Export method.
+func BenchmarkHTMLExporter_Export(b *testing.B) {
+	htmlCleaner := services.NewHTMLCleaner()
+	exporter := NewHTMLExporter(htmlCleaner)
+	course := createTestCourseForHTML()
+
+	// Create temporary directory
+	tempDir := b.TempDir()
+
+	b.ResetTimer()
+	for i := 0; i < b.N; i++ {
+		outputPath := filepath.Join(tempDir, "benchmark-course.html")
+		_ = exporter.Export(course, outputPath)
+		// Clean up for next iteration
+		os.Remove(outputPath)
+	}
+}
+
+// BenchmarkHTMLExporter_ProcessTextItem benchmarks text item processing.
+func BenchmarkHTMLExporter_ProcessTextItem(b *testing.B) {
+	htmlCleaner := services.NewHTMLCleaner()
+	exporter := &HTMLExporter{htmlCleaner: htmlCleaner}
+
+	item := models.Item{
+		Type: "text",
+		Items: []models.SubItem{
+			{
+				Heading:   "<h1>Benchmark Heading</h1>",
+				Paragraph: "<p>Benchmark paragraph with <strong>formatting</strong>.</p>",
+			},
+		},
+	}
+
+	b.ResetTimer()
+	for i := 0; i < b.N; i++ {
+		var buf bytes.Buffer
+		exporter.processTextItem(&buf, item)
+	}
+}
+
+// BenchmarkHTMLExporter_ComplexCourse benchmarks export of a complex course.
+func BenchmarkHTMLExporter_ComplexCourse(b *testing.B) {
+	htmlCleaner := services.NewHTMLCleaner()
+	exporter := NewHTMLExporter(htmlCleaner)
+
+	// Create complex course for benchmarking
+	course := &models.Course{
+		ShareID: "benchmark-id",
+		Course: models.CourseInfo{
+			ID:          "benchmark-course",
+			Title:       "Benchmark Course",
+			Description: "<p>Complex course for performance testing</p>",
+			Lessons:     make([]models.Lesson, 10), // 10 lessons
+		},
+	}
+
+	// Fill with test data
+	for i := 0; i < 10; i++ {
+		lesson := models.Lesson{
+			ID:    "lesson-" + string(rune(i)),
+			Title: "Lesson " + string(rune(i)),
+			Type:  "lesson",
+			Items: make([]models.Item, 5), // 5 items per lesson
+		}
+
+		for j := 0; j < 5; j++ {
+			item := models.Item{
+				Type:  "text",
+				Items: make([]models.SubItem, 3), // 3 sub-items per item
+			}
+
+			for k := 0; k < 3; k++ {
+				item.Items[k] = models.SubItem{
+					Heading:   "<h3>Heading " + string(rune(k)) + "</h3>",
+					Paragraph: "<p>Paragraph content with <strong>formatting</strong> for performance testing.</p>",
+				}
+			}
+
+			lesson.Items[j] = item
+		}
+
+		course.Course.Lessons[i] = lesson
+	}
+
+	tempDir := b.TempDir()
+
+	b.ResetTimer()
+	for i := 0; i < b.N; i++ {
+		outputPath := filepath.Join(tempDir, "benchmark-complex.html")
+		_ = exporter.Export(course, outputPath)
+		os.Remove(outputPath)
+	}
+}

internal/exporters/markdown.go

@@ -0,0 +1,289 @@
+// Package exporters provides implementations of the Exporter interface
+// for converting Articulate Rise courses into various file formats.
+package exporters
+
+import (
+	"bytes"
+	"fmt"
+	"os"
+	"strings"
+
+	"github.com/kjanat/articulate-parser/internal/interfaces"
+	"github.com/kjanat/articulate-parser/internal/models"
+	"github.com/kjanat/articulate-parser/internal/services"
+)
+
+// MarkdownExporter implements the Exporter interface for Markdown format.
+// It converts Articulate Rise course data into a structured Markdown document.
+type MarkdownExporter struct {
+	// htmlCleaner is used to convert HTML content to plain text
+	htmlCleaner *services.HTMLCleaner
+}
+
+// NewMarkdownExporter creates a new MarkdownExporter instance.
+// It takes an HTMLCleaner to handle HTML content conversion.
+//
+// Parameters:
+//   - htmlCleaner: Service for cleaning HTML content in course data
+//
+// Returns:
+//   - An implementation of the Exporter interface for Markdown format
+func NewMarkdownExporter(htmlCleaner *services.HTMLCleaner) interfaces.Exporter {
+	return &MarkdownExporter{
+		htmlCleaner: htmlCleaner,
+	}
+}
+
+// Export exports a course to Markdown format.
+// It generates a structured Markdown document from the course data
+// and writes it to the specified output path.
+//
+// Parameters:
+//   - course: The course data model to export
+//   - outputPath: The file path where the Markdown content will be written
+//
+// Returns:
+//   - An error if writing to the output file fails
+func (e *MarkdownExporter) Export(course *models.Course, outputPath string) error {
+	var buf bytes.Buffer
+
+	// Write course header
+	buf.WriteString(fmt.Sprintf("# %s\n\n", course.Course.Title))
+
+	if course.Course.Description != "" {
+		buf.WriteString(fmt.Sprintf("%s\n\n", e.htmlCleaner.CleanHTML(course.Course.Description)))
+	}
+
+	// Add metadata
+	buf.WriteString("## Course Information\n\n")
+	buf.WriteString(fmt.Sprintf("- **Course ID**: %s\n", course.Course.ID))
+	buf.WriteString(fmt.Sprintf("- **Share ID**: %s\n", course.ShareID))
+	buf.WriteString(fmt.Sprintf("- **Navigation Mode**: %s\n", course.Course.NavigationMode))
+	if course.Course.ExportSettings != nil {
+		buf.WriteString(fmt.Sprintf("- **Export Format**: %s\n", course.Course.ExportSettings.Format))
+	}
+	buf.WriteString("\n---\n\n")
+
+	// Process lessons
+	lessonCounter := 0
+	for _, lesson := range course.Course.Lessons {
+		if lesson.Type == "section" {
+			buf.WriteString(fmt.Sprintf("# %s\n\n", lesson.Title))
+			continue
+		}
+
+		lessonCounter++
+		buf.WriteString(fmt.Sprintf("## Lesson %d: %s\n\n", lessonCounter, lesson.Title))
+
+		if lesson.Description != "" {
+			buf.WriteString(fmt.Sprintf("%s\n\n", e.htmlCleaner.CleanHTML(lesson.Description)))
+		}
+
+		// Process lesson items
+		for _, item := range lesson.Items {
+			e.processItemToMarkdown(&buf, item, 3)
+		}
+
+		buf.WriteString("\n---\n\n")
+	}
+
+	return os.WriteFile(outputPath, buf.Bytes(), 0644)
+}
+
+// GetSupportedFormat returns the format name this exporter supports
+// It indicates the file format that the MarkdownExporter can generate.
+//
+// Returns:
+//   - A string representing the supported format ("markdown")
+func (e *MarkdownExporter) GetSupportedFormat() string {
+	return "markdown"
+}
+
+// processItemToMarkdown converts a course item into Markdown format
+// and appends it to the provided buffer. It handles different item types
+// with appropriate Markdown formatting.
+//
+// Parameters:
+//   - buf: The buffer to write the Markdown content to
+//   - item: The course item to process
+//   - level: The heading level for the item (determines the number of # characters)
+func (e *MarkdownExporter) processItemToMarkdown(buf *bytes.Buffer, item models.Item, level int) {
+	headingPrefix := strings.Repeat("#", level)
+
+	switch item.Type {
+	case "text":
+		e.processTextItem(buf, item, headingPrefix)
+	case "list":
+		e.processListItem(buf, item)
+	case "multimedia":
+		e.processMultimediaItem(buf, item, headingPrefix)
+	case "image":
+		e.processImageItem(buf, item, headingPrefix)
+	case "knowledgeCheck":
+		e.processKnowledgeCheckItem(buf, item, headingPrefix)
+	case "interactive":
+		e.processInteractiveItem(buf, item, headingPrefix)
+	case "divider":
+		e.processDividerItem(buf)
+	default:
+		e.processUnknownItem(buf, item, headingPrefix)
+	}
+}
+
+// processTextItem handles text content with headings and paragraphs
+func (e *MarkdownExporter) processTextItem(buf *bytes.Buffer, item models.Item, headingPrefix string) {
+	for _, subItem := range item.Items {
+		if subItem.Heading != "" {
+			heading := e.htmlCleaner.CleanHTML(subItem.Heading)
+			if heading != "" {
+				buf.WriteString(fmt.Sprintf("%s %s\n\n", headingPrefix, heading))
+			}
+		}
+		if subItem.Paragraph != "" {
+			paragraph := e.htmlCleaner.CleanHTML(subItem.Paragraph)
+			if paragraph != "" {
+				buf.WriteString(fmt.Sprintf("%s\n\n", paragraph))
+			}
+		}
+	}
+}
+
+// processListItem handles list items with bullet points
+func (e *MarkdownExporter) processListItem(buf *bytes.Buffer, item models.Item) {
+	for _, subItem := range item.Items {
+		if subItem.Paragraph != "" {
+			paragraph := e.htmlCleaner.CleanHTML(subItem.Paragraph)
+			if paragraph != "" {
+				buf.WriteString(fmt.Sprintf("- %s\n", paragraph))
+			}
+		}
+	}
+	buf.WriteString("\n")
+}
+
+// processMultimediaItem handles multimedia content including videos and images
+func (e *MarkdownExporter) processMultimediaItem(buf *bytes.Buffer, item models.Item, headingPrefix string) {
+	buf.WriteString(fmt.Sprintf("%s Media Content\n\n", headingPrefix))
+	for _, subItem := range item.Items {
+		e.processMediaSubItem(buf, subItem)
+	}
+	buf.WriteString("\n")
+}
+
+// processMediaSubItem processes individual media items (video/image)
+func (e *MarkdownExporter) processMediaSubItem(buf *bytes.Buffer, subItem models.SubItem) {
+	if subItem.Media != nil {
+		e.processVideoMedia(buf, subItem.Media)
+		e.processImageMedia(buf, subItem.Media)
+	}
+	if subItem.Caption != "" {
+		caption := e.htmlCleaner.CleanHTML(subItem.Caption)
+		buf.WriteString(fmt.Sprintf("*%s*\n", caption))
+	}
+}
+
+// processVideoMedia processes video media content
+func (e *MarkdownExporter) processVideoMedia(buf *bytes.Buffer, media *models.Media) {
+	if media.Video != nil {
+		buf.WriteString(fmt.Sprintf("**Video**: %s\n", media.Video.OriginalUrl))
+		if media.Video.Duration > 0 {
+			buf.WriteString(fmt.Sprintf("**Duration**: %d seconds\n", media.Video.Duration))
+		}
+	}
+}
+
+// processImageMedia processes image media content
+func (e *MarkdownExporter) processImageMedia(buf *bytes.Buffer, media *models.Media) {
+	if media.Image != nil {
+		buf.WriteString(fmt.Sprintf("**Image**: %s\n", media.Image.OriginalUrl))
+	}
+}
+
+// processImageItem handles standalone image items
+func (e *MarkdownExporter) processImageItem(buf *bytes.Buffer, item models.Item, headingPrefix string) {
+	buf.WriteString(fmt.Sprintf("%s Image\n\n", headingPrefix))
+	for _, subItem := range item.Items {
+		if subItem.Media != nil && subItem.Media.Image != nil {
+			buf.WriteString(fmt.Sprintf("**Image**: %s\n", subItem.Media.Image.OriginalUrl))
+		}
+		if subItem.Caption != "" {
+			caption := e.htmlCleaner.CleanHTML(subItem.Caption)
+			buf.WriteString(fmt.Sprintf("*%s*\n", caption))
+		}
+	}
+	buf.WriteString("\n")
+}
+
+// processKnowledgeCheckItem handles quiz questions and knowledge checks
+func (e *MarkdownExporter) processKnowledgeCheckItem(buf *bytes.Buffer, item models.Item, headingPrefix string) {
+	buf.WriteString(fmt.Sprintf("%s Knowledge Check\n\n", headingPrefix))
+	for _, subItem := range item.Items {
+		e.processQuestionSubItem(buf, subItem)
+	}
+	buf.WriteString("\n")
+}
+
+// processQuestionSubItem processes individual question items
+func (e *MarkdownExporter) processQuestionSubItem(buf *bytes.Buffer, subItem models.SubItem) {
+	if subItem.Title != "" {
+		title := e.htmlCleaner.CleanHTML(subItem.Title)
+		buf.WriteString(fmt.Sprintf("**Question**: %s\n\n", title))
+	}
+
+	e.processAnswers(buf, subItem.Answers)
+
+	if subItem.Feedback != "" {
+		feedback := e.htmlCleaner.CleanHTML(subItem.Feedback)
+		buf.WriteString(fmt.Sprintf("\n**Feedback**: %s\n", feedback))
+	}
+}
+
+// processAnswers processes answer choices for quiz questions
+func (e *MarkdownExporter) processAnswers(buf *bytes.Buffer, answers []models.Answer) {
+	buf.WriteString("**Answers**:\n")
+	for i, answer := range answers {
+		correctMark := ""
+		if answer.Correct {
+			correctMark = " ✓"
+		}
+		buf.WriteString(fmt.Sprintf("%d. %s%s\n", i+1, answer.Title, correctMark))
+	}
+}
+
+// processInteractiveItem handles interactive content
+func (e *MarkdownExporter) processInteractiveItem(buf *bytes.Buffer, item models.Item, headingPrefix string) {
+	buf.WriteString(fmt.Sprintf("%s Interactive Content\n\n", headingPrefix))
+	for _, subItem := range item.Items {
+		if subItem.Title != "" {
+			title := e.htmlCleaner.CleanHTML(subItem.Title)
+			buf.WriteString(fmt.Sprintf("**%s**\n\n", title))
+		}
+	}
+}
+
+// processDividerItem handles divider elements
+func (e *MarkdownExporter) processDividerItem(buf *bytes.Buffer) {
+	buf.WriteString("---\n\n")
+}
+
+// processUnknownItem handles unknown or unsupported item types
+func (e *MarkdownExporter) processUnknownItem(buf *bytes.Buffer, item models.Item, headingPrefix string) {
+	if len(item.Items) > 0 {
+		buf.WriteString(fmt.Sprintf("%s %s Content\n\n", headingPrefix, strings.Title(item.Type)))
+		for _, subItem := range item.Items {
+			e.processGenericSubItem(buf, subItem)
+		}
+	}
+}
+
+// processGenericSubItem processes sub-items for unknown types
+func (e *MarkdownExporter) processGenericSubItem(buf *bytes.Buffer, subItem models.SubItem) {
+	if subItem.Title != "" {
+		title := e.htmlCleaner.CleanHTML(subItem.Title)
+		buf.WriteString(fmt.Sprintf("**%s**\n\n", title))
+	}
+	if subItem.Paragraph != "" {
+		paragraph := e.htmlCleaner.CleanHTML(subItem.Paragraph)
+		buf.WriteString(fmt.Sprintf("%s\n\n", paragraph))
+	}
+}

internal/exporters/markdown_test.go

@@ -0,0 +1,693 @@
+// Package exporters_test provides tests for the markdown exporter.
+package exporters
+
+import (
+	"bytes"
+	"os"
+	"path/filepath"
+	"strings"
+	"testing"
+
+	"github.com/kjanat/articulate-parser/internal/models"
+	"github.com/kjanat/articulate-parser/internal/services"
+)
+
+// TestNewMarkdownExporter tests the NewMarkdownExporter constructor.
+func TestNewMarkdownExporter(t *testing.T) {
+	htmlCleaner := services.NewHTMLCleaner()
+	exporter := NewMarkdownExporter(htmlCleaner)
+
+	if exporter == nil {
+		t.Fatal("NewMarkdownExporter() returned nil")
+	}
+
+	// Type assertion to check internal structure
+	markdownExporter, ok := exporter.(*MarkdownExporter)
+	if !ok {
+		t.Fatal("NewMarkdownExporter() returned wrong type")
+	}
+
+	if markdownExporter.htmlCleaner == nil {
+		t.Error("htmlCleaner should not be nil")
+	}
+}
+
+// TestMarkdownExporter_GetSupportedFormat tests the GetSupportedFormat method.
+func TestMarkdownExporter_GetSupportedFormat(t *testing.T) {
+	htmlCleaner := services.NewHTMLCleaner()
+	exporter := NewMarkdownExporter(htmlCleaner)
+
+	expected := "markdown"
+	result := exporter.GetSupportedFormat()
+
+	if result != expected {
+		t.Errorf("Expected format '%s', got '%s'", expected, result)
+	}
+}
+
+// TestMarkdownExporter_Export tests the Export method.
+func TestMarkdownExporter_Export(t *testing.T) {
+	htmlCleaner := services.NewHTMLCleaner()
+	exporter := NewMarkdownExporter(htmlCleaner)
+
+	// Create test course
+	testCourse := createTestCourseForMarkdown()
+
+	// Create temporary directory and file
+	tempDir := t.TempDir()
+	outputPath := filepath.Join(tempDir, "test-course.md")
+
+	// Test successful export
+	err := exporter.Export(testCourse, outputPath)
+	if err != nil {
+		t.Fatalf("Export failed: %v", err)
+	}
+
+	// Check that file was created
+	if _, err := os.Stat(outputPath); os.IsNotExist(err) {
+		t.Fatal("Output file was not created")
+	}
+
+	// Read and verify content
+	content, err := os.ReadFile(outputPath)
+	if err != nil {
+		t.Fatalf("Failed to read output file: %v", err)
+	}
+
+	contentStr := string(content)
+
+	// Verify main course title
+	if !strings.Contains(contentStr, "# Test Course") {
+		t.Error("Output should contain course title as main heading")
+	}
+
+	// Verify course information section
+	if !strings.Contains(contentStr, "## Course Information") {
+		t.Error("Output should contain course information section")
+	}
+
+	// Verify course metadata
+	if !strings.Contains(contentStr, "- **Course ID**: test-course-id") {
+		t.Error("Output should contain course ID")
+	}
+
+	if !strings.Contains(contentStr, "- **Share ID**: test-share-id") {
+		t.Error("Output should contain share ID")
+	}
+
+	// Verify lesson content
+	if !strings.Contains(contentStr, "## Lesson 1: Test Lesson") {
+		t.Error("Output should contain lesson heading")
+	}
+
+	// Verify section handling
+	if !strings.Contains(contentStr, "# Test Section") {
+		t.Error("Output should contain section as main heading")
+	}
+}
+
+// TestMarkdownExporter_Export_InvalidPath tests export with invalid output path.
+func TestMarkdownExporter_Export_InvalidPath(t *testing.T) {
+	htmlCleaner := services.NewHTMLCleaner()
+	exporter := NewMarkdownExporter(htmlCleaner)
+
+	testCourse := createTestCourseForMarkdown()
+
+	// Try to write to invalid path
+	invalidPath := "/invalid/path/that/does/not/exist/file.md"
+	err := exporter.Export(testCourse, invalidPath)
+
+	if err == nil {
+		t.Fatal("Expected error for invalid path, got nil")
+	}
+}
+
+// TestMarkdownExporter_ProcessTextItem tests the processTextItem method.
+func TestMarkdownExporter_ProcessTextItem(t *testing.T) {
+	htmlCleaner := services.NewHTMLCleaner()
+	exporter := &MarkdownExporter{htmlCleaner: htmlCleaner}
+
+	var buf bytes.Buffer
+	item := models.Item{
+		Type: "text",
+		Items: []models.SubItem{
+			{
+				Heading:   "<h1>Test Heading</h1>",
+				Paragraph: "<p>Test paragraph with <strong>bold</strong> text.</p>",
+			},
+			{
+				Paragraph: "<p>Another paragraph.</p>",
+			},
+		},
+	}
+
+	exporter.processTextItem(&buf, item, "###")
+
+	result := buf.String()
+	expected := "### Test Heading\n\nTest paragraph with bold text.\n\nAnother paragraph.\n\n"
+
+	if result != expected {
+		t.Errorf("Expected:\n%q\nGot:\n%q", expected, result)
+	}
+}
+
+// TestMarkdownExporter_ProcessListItem tests the processListItem method.
+func TestMarkdownExporter_ProcessListItem(t *testing.T) {
+	htmlCleaner := services.NewHTMLCleaner()
+	exporter := &MarkdownExporter{htmlCleaner: htmlCleaner}
+
+	var buf bytes.Buffer
+	item := models.Item{
+		Type: "list",
+		Items: []models.SubItem{
+			{Paragraph: "<p>First item</p>"},
+			{Paragraph: "<p>Second item with <em>emphasis</em></p>"},
+			{Paragraph: "<p>Third item</p>"},
+		},
+	}
+
+	exporter.processListItem(&buf, item)
+
+	result := buf.String()
+	expected := "- First item\n- Second item with emphasis\n- Third item\n\n"
+
+	if result != expected {
+		t.Errorf("Expected:\n%q\nGot:\n%q", expected, result)
+	}
+}
+
+// TestMarkdownExporter_ProcessMultimediaItem tests the processMultimediaItem method.
+func TestMarkdownExporter_ProcessMultimediaItem(t *testing.T) {
+	htmlCleaner := services.NewHTMLCleaner()
+	exporter := &MarkdownExporter{htmlCleaner: htmlCleaner}
+
+	var buf bytes.Buffer
+	item := models.Item{
+		Type: "multimedia",
+		Items: []models.SubItem{
+			{
+				Media: &models.Media{
+					Video: &models.VideoMedia{
+						OriginalUrl: "https://example.com/video.mp4",
+						Duration:    120,
+					},
+				},
+				Caption: "<p>Video caption</p>",
+			},
+		},
+	}
+
+	exporter.processMultimediaItem(&buf, item, "###")
+
+	result := buf.String()
+
+	if !strings.Contains(result, "### Media Content") {
+		t.Error("Should contain media content heading")
+	}
+	if !strings.Contains(result, "**Video**: https://example.com/video.mp4") {
+		t.Error("Should contain video URL")
+	}
+	if !strings.Contains(result, "**Duration**: 120 seconds") {
+		t.Error("Should contain video duration")
+	}
+	if !strings.Contains(result, "*Video caption*") {
+		t.Error("Should contain video caption")
+	}
+}
+
+// TestMarkdownExporter_ProcessImageItem tests the processImageItem method.
+func TestMarkdownExporter_ProcessImageItem(t *testing.T) {
+	htmlCleaner := services.NewHTMLCleaner()
+	exporter := &MarkdownExporter{htmlCleaner: htmlCleaner}
+
+	var buf bytes.Buffer
+	item := models.Item{
+		Type: "image",
+		Items: []models.SubItem{
+			{
+				Media: &models.Media{
+					Image: &models.ImageMedia{
+						OriginalUrl: "https://example.com/image.jpg",
+					},
+				},
+				Caption: "<p>Image caption</p>",
+			},
+		},
+	}
+
+	exporter.processImageItem(&buf, item, "###")
+
+	result := buf.String()
+
+	if !strings.Contains(result, "### Image") {
+		t.Error("Should contain image heading")
+	}
+	if !strings.Contains(result, "**Image**: https://example.com/image.jpg") {
+		t.Error("Should contain image URL")
+	}
+	if !strings.Contains(result, "*Image caption*") {
+		t.Error("Should contain image caption")
+	}
+}
+
+// TestMarkdownExporter_ProcessKnowledgeCheckItem tests the processKnowledgeCheckItem method.
+func TestMarkdownExporter_ProcessKnowledgeCheckItem(t *testing.T) {
+	htmlCleaner := services.NewHTMLCleaner()
+	exporter := &MarkdownExporter{htmlCleaner: htmlCleaner}
+
+	var buf bytes.Buffer
+	item := models.Item{
+		Type: "knowledgeCheck",
+		Items: []models.SubItem{
+			{
+				Title: "<p>What is the capital of France?</p>",
+				Answers: []models.Answer{
+					{Title: "London", Correct: false},
+					{Title: "Paris", Correct: true},
+					{Title: "Berlin", Correct: false},
+				},
+				Feedback: "<p>Paris is the capital of France.</p>",
+			},
+		},
+	}
+
+	exporter.processKnowledgeCheckItem(&buf, item, "###")
+
+	result := buf.String()
+
+	if !strings.Contains(result, "### Knowledge Check") {
+		t.Error("Should contain knowledge check heading")
+	}
+	if !strings.Contains(result, "**Question**: What is the capital of France?") {
+		t.Error("Should contain question")
+	}
+	if !strings.Contains(result, "**Answers**:") {
+		t.Error("Should contain answers heading")
+	}
+	if !strings.Contains(result, "2. Paris ✓") {
+		t.Error("Should mark correct answer")
+	}
+	if !strings.Contains(result, "**Feedback**: Paris is the capital of France.") {
+		t.Error("Should contain feedback")
+	}
+}
+
+// TestMarkdownExporter_ProcessInteractiveItem tests the processInteractiveItem method.
+func TestMarkdownExporter_ProcessInteractiveItem(t *testing.T) {
+	htmlCleaner := services.NewHTMLCleaner()
+	exporter := &MarkdownExporter{htmlCleaner: htmlCleaner}
+
+	var buf bytes.Buffer
+	item := models.Item{
+		Type: "interactive",
+		Items: []models.SubItem{
+			{Title: "<p>Interactive element title</p>"},
+		},
+	}
+
+	exporter.processInteractiveItem(&buf, item, "###")
+
+	result := buf.String()
+
+	if !strings.Contains(result, "### Interactive Content") {
+		t.Error("Should contain interactive content heading")
+	}
+	if !strings.Contains(result, "**Interactive element title**") {
+		t.Error("Should contain interactive element title")
+	}
+}
+
+// TestMarkdownExporter_ProcessDividerItem tests the processDividerItem method.
+func TestMarkdownExporter_ProcessDividerItem(t *testing.T) {
+	htmlCleaner := services.NewHTMLCleaner()
+	exporter := &MarkdownExporter{htmlCleaner: htmlCleaner}
+
+	var buf bytes.Buffer
+	exporter.processDividerItem(&buf)
+
+	result := buf.String()
+	expected := "---\n\n"
+
+	if result != expected {
+		t.Errorf("Expected %q, got %q", expected, result)
+	}
+}
+
+// TestMarkdownExporter_ProcessUnknownItem tests the processUnknownItem method.
+func TestMarkdownExporter_ProcessUnknownItem(t *testing.T) {
+	htmlCleaner := services.NewHTMLCleaner()
+	exporter := &MarkdownExporter{htmlCleaner: htmlCleaner}
+
+	var buf bytes.Buffer
+	item := models.Item{
+		Type: "unknown",
+		Items: []models.SubItem{
+			{
+				Title:     "<p>Unknown item title</p>",
+				Paragraph: "<p>Unknown item content</p>",
+			},
+		},
+	}
+
+	exporter.processUnknownItem(&buf, item, "###")
+
+	result := buf.String()
+
+	if !strings.Contains(result, "### Unknown Content") {
+		t.Error("Should contain unknown content heading")
+	}
+	if !strings.Contains(result, "**Unknown item title**") {
+		t.Error("Should contain unknown item title")
+	}
+	if !strings.Contains(result, "Unknown item content") {
+		t.Error("Should contain unknown item content")
+	}
+}
+
+// TestMarkdownExporter_ProcessVideoMedia tests the processVideoMedia method.
+func TestMarkdownExporter_ProcessVideoMedia(t *testing.T) {
+	htmlCleaner := services.NewHTMLCleaner()
+	exporter := &MarkdownExporter{htmlCleaner: htmlCleaner}
+
+	var buf bytes.Buffer
+	media := &models.Media{
+		Video: &models.VideoMedia{
+			OriginalUrl: "https://example.com/video.mp4",
+			Duration:    300,
+		},
+	}
+
+	exporter.processVideoMedia(&buf, media)
+
+	result := buf.String()
+
+	if !strings.Contains(result, "**Video**: https://example.com/video.mp4") {
+		t.Error("Should contain video URL")
+	}
+	if !strings.Contains(result, "**Duration**: 300 seconds") {
+		t.Error("Should contain video duration")
+	}
+}
+
+// TestMarkdownExporter_ProcessImageMedia tests the processImageMedia method.
+func TestMarkdownExporter_ProcessImageMedia(t *testing.T) {
+	htmlCleaner := services.NewHTMLCleaner()
+	exporter := &MarkdownExporter{htmlCleaner: htmlCleaner}
+
+	var buf bytes.Buffer
+	media := &models.Media{
+		Image: &models.ImageMedia{
+			OriginalUrl: "https://example.com/image.jpg",
+		},
+	}
+
+	exporter.processImageMedia(&buf, media)
+
+	result := buf.String()
+	expected := "**Image**: https://example.com/image.jpg\n"
+
+	if result != expected {
+		t.Errorf("Expected %q, got %q", expected, result)
+	}
+}
+
+// TestMarkdownExporter_ProcessAnswers tests the processAnswers method.
+func TestMarkdownExporter_ProcessAnswers(t *testing.T) {
+	htmlCleaner := services.NewHTMLCleaner()
+	exporter := &MarkdownExporter{htmlCleaner: htmlCleaner}
+
+	var buf bytes.Buffer
+	answers := []models.Answer{
+		{Title: "Answer 1", Correct: false},
+		{Title: "Answer 2", Correct: true},
+		{Title: "Answer 3", Correct: false},
+	}
+
+	exporter.processAnswers(&buf, answers)
+
+	result := buf.String()
+
+	if !strings.Contains(result, "**Answers**:") {
+		t.Error("Should contain answers heading")
+	}
+	if !strings.Contains(result, "1. Answer 1") {
+		t.Error("Should contain first answer")
+	}
+	if !strings.Contains(result, "2. Answer 2 ✓") {
+		t.Error("Should mark correct answer")
+	}
+	if !strings.Contains(result, "3. Answer 3") {
+		t.Error("Should contain third answer")
+	}
+}
+
+// TestMarkdownExporter_ProcessItemToMarkdown_AllTypes tests all item types.
+func TestMarkdownExporter_ProcessItemToMarkdown_AllTypes(t *testing.T) {
+	htmlCleaner := services.NewHTMLCleaner()
+	exporter := &MarkdownExporter{htmlCleaner: htmlCleaner}
+
+	tests := []struct {
+		name         string
+		itemType     string
+		expectedText string
+	}{
+		{
+			name:         "text item",
+			itemType:     "text",
+			expectedText: "", // processTextItem handles empty items
+		},
+		{
+			name:         "list item",
+			itemType:     "list",
+			expectedText: "\n", // Empty list adds newline
+		},
+		{
+			name:         "multimedia item",
+			itemType:     "multimedia",
+			expectedText: "### Media Content",
+		},
+		{
+			name:         "image item",
+			itemType:     "image",
+			expectedText: "### Image",
+		},
+		{
+			name:         "knowledgeCheck item",
+			itemType:     "knowledgeCheck",
+			expectedText: "### Knowledge Check",
+		},
+		{
+			name:         "interactive item",
+			itemType:     "interactive",
+			expectedText: "### Interactive Content",
+		},
+		{
+			name:         "divider item",
+			itemType:     "divider",
+			expectedText: "---",
+		},
+		{
+			name:         "unknown item",
+			itemType:     "unknown",
+			expectedText: "", // Empty unknown items don't add content
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			var buf bytes.Buffer
+			item := models.Item{Type: tt.itemType}
+
+			exporter.processItemToMarkdown(&buf, item, 3)
+
+			result := buf.String()
+			if tt.expectedText != "" && !strings.Contains(result, tt.expectedText) {
+				t.Errorf("Expected result to contain %q, got %q", tt.expectedText, result)
+			}
+		})
+	}
+}
+
+// TestMarkdownExporter_ComplexCourse tests export of a complex course structure.
+func TestMarkdownExporter_ComplexCourse(t *testing.T) {
+	htmlCleaner := services.NewHTMLCleaner()
+	exporter := NewMarkdownExporter(htmlCleaner)
+
+	// Create complex test course
+	course := &models.Course{
+		ShareID: "complex-test-id",
+		Author:  "Test Author",
+		Course: models.CourseInfo{
+			ID:             "complex-course",
+			Title:          "Complex Test Course",
+			Description:    "<p>This is a <strong>complex</strong> course description.</p>",
+			NavigationMode: "menu",
+			ExportSettings: &models.ExportSettings{
+				Format: "scorm",
+			},
+			Lessons: []models.Lesson{
+				{
+					ID:    "section-1",
+					Title: "Course Section",
+					Type:  "section",
+				},
+				{
+					ID:          "lesson-1",
+					Title:       "Introduction Lesson",
+					Type:        "lesson",
+					Description: "<p>Introduction to the course</p>",
+					Items: []models.Item{
+						{
+							Type: "text",
+							Items: []models.SubItem{
+								{
+									Heading:   "<h2>Welcome</h2>",
+									Paragraph: "<p>Welcome to our course!</p>",
+								},
+							},
+						},
+						{
+							Type: "list",
+							Items: []models.SubItem{
+								{Paragraph: "<p>First objective</p>"},
+								{Paragraph: "<p>Second objective</p>"},
+							},
+						},
+						{
+							Type: "knowledgeCheck",
+							Items: []models.SubItem{
+								{
+									Title: "<p>What will you learn?</p>",
+									Answers: []models.Answer{
+										{Title: "Nothing", Correct: false},
+										{Title: "Everything", Correct: true},
+									},
+									Feedback: "<p>Great choice!</p>",
+								},
+							},
+						},
+					},
+				},
+			},
+		},
+	}
+
+	// Create temporary output file
+	tempDir := t.TempDir()
+	outputPath := filepath.Join(tempDir, "complex-course.md")
+
+	// Export course
+	err := exporter.Export(course, outputPath)
+	if err != nil {
+		t.Fatalf("Export failed: %v", err)
+	}
+
+	// Read and verify content
+	content, err := os.ReadFile(outputPath)
+	if err != nil {
+		t.Fatalf("Failed to read output file: %v", err)
+	}
+
+	contentStr := string(content)
+
+	// Verify various elements are present
+	checks := []string{
+		"# Complex Test Course",
+		"This is a complex course description.",
+		"- **Export Format**: scorm",
+		"# Course Section",
+		"## Lesson 1: Introduction Lesson",
+		"Introduction to the course",
+		"### Welcome",
+		"Welcome to our course!",
+		"- First objective",
+		"- Second objective",
+		"### Knowledge Check",
+		"**Question**: What will you learn?",
+		"2. Everything ✓",
+		"**Feedback**: Great choice!",
+	}
+
+	for _, check := range checks {
+		if !strings.Contains(contentStr, check) {
+			t.Errorf("Output should contain: %q", check)
+		}
+	}
+}
+
+// createTestCourseForMarkdown creates a test course for markdown export testing.
+func createTestCourseForMarkdown() *models.Course {
+	return &models.Course{
+		ShareID: "test-share-id",
+		Author:  "Test Author",
+		Course: models.CourseInfo{
+			ID:             "test-course-id",
+			Title:          "Test Course",
+			Description:    "Test course description",
+			NavigationMode: "menu",
+			Lessons: []models.Lesson{
+				{
+					ID:    "section-1",
+					Title: "Test Section",
+					Type:  "section",
+				},
+				{
+					ID:    "lesson-1",
+					Title: "Test Lesson",
+					Type:  "lesson",
+					Items: []models.Item{
+						{
+							Type: "text",
+							Items: []models.SubItem{
+								{
+									Heading:   "Test Heading",
+									Paragraph: "Test paragraph content",
+								},
+							},
+						},
+					},
+				},
+			},
+		},
+	}
+}
+
+// BenchmarkMarkdownExporter_Export benchmarks the Export method.
+func BenchmarkMarkdownExporter_Export(b *testing.B) {
+	htmlCleaner := services.NewHTMLCleaner()
+	exporter := NewMarkdownExporter(htmlCleaner)
+	course := createTestCourseForMarkdown()
+
+	// Create temporary directory
+	tempDir := b.TempDir()
+
+	b.ResetTimer()
+	for i := 0; i < b.N; i++ {
+		outputPath := filepath.Join(tempDir, "benchmark-course.md")
+		_ = exporter.Export(course, outputPath)
+		// Clean up for next iteration
+		os.Remove(outputPath)
+	}
+}
+
+// BenchmarkMarkdownExporter_ProcessTextItem benchmarks the processTextItem method.
+func BenchmarkMarkdownExporter_ProcessTextItem(b *testing.B) {
+	htmlCleaner := services.NewHTMLCleaner()
+	exporter := &MarkdownExporter{htmlCleaner: htmlCleaner}
+
+	item := models.Item{
+		Type: "text",
+		Items: []models.SubItem{
+			{
+				Heading:   "<h1>Benchmark Heading</h1>",
+				Paragraph: "<p>Benchmark paragraph with <strong>bold</strong> text.</p>",
+			},
+		},
+	}
+
+	b.ResetTimer()
+	for i := 0; i < b.N; i++ {
+		var buf bytes.Buffer
+		exporter.processTextItem(&buf, item, "###")
+	}
+}

internal/interfaces/exporter.go

@@ -0,0 +1,31 @@
+// Package interfaces provides the core contracts for the articulate-parser application.
+// It defines interfaces for parsing and exporting Articulate Rise courses.
+package interfaces
+
+import "github.com/kjanat/articulate-parser/internal/models"
+
+// Exporter defines the interface for exporting courses to different formats.
+// Implementations of this interface handle the conversion of course data to
+// specific output formats like Markdown or DOCX.
+type Exporter interface {
+	// Export converts a course to the supported format and writes it to the
+	// specified output path. It returns an error if the export operation fails.
+	Export(course *models.Course, outputPath string) error
+
+	// GetSupportedFormat returns the name of the format this exporter supports.
+	// This is used to identify which exporter to use for a given format.
+	GetSupportedFormat() string
+}
+
+// ExporterFactory creates exporters for different formats.
+// It acts as a factory for creating appropriate Exporter implementations
+// based on the requested format.
+type ExporterFactory interface {
+	// CreateExporter instantiates an exporter for the specified format.
+	// It returns the appropriate exporter or an error if the format is not supported.
+	CreateExporter(format string) (Exporter, error)
+
+	// GetSupportedFormats returns a list of all export formats supported by this factory.
+	// This is used to inform users of available export options.
+	GetSupportedFormats() []string
+}

internal/interfaces/parser.go

@@ -0,0 +1,20 @@
+// Package interfaces provides the core contracts for the articulate-parser application.
+// It defines interfaces for parsing and exporting Articulate Rise courses.
+package interfaces
+
+import "github.com/kjanat/articulate-parser/internal/models"
+
+// CourseParser defines the interface for loading course data.
+// It provides methods to fetch course content either from a remote URI
+// or from a local file path.
+type CourseParser interface {
+	// FetchCourse loads a course from a URI (typically an Articulate Rise share URL).
+	// It retrieves the course data from the remote location and returns a parsed Course model.
+	// Returns an error if the fetch operation fails or if the data cannot be parsed.
+	FetchCourse(uri string) (*models.Course, error)
+
+	// LoadCourseFromFile loads a course from a local file.
+	// It reads and parses the course data from the specified file path.
+	// Returns an error if the file cannot be read or if the data cannot be parsed.
+	LoadCourseFromFile(filePath string) (*models.Course, error)
+}

internal/models/course.go

@@ -0,0 +1,55 @@
+// Package models defines the data structures representing Articulate Rise courses.
+// These structures closely match the JSON format used by Articulate Rise.
+package models
+
+// Course represents the top-level structure of an Articulate Rise course.
+// It contains metadata and the actual course content.
+type Course struct {
+	// ShareID is the unique identifier used in public sharing URLs
+	ShareID string `json:"shareId"`
+	// Author is the name of the course creator
+	Author string `json:"author"`
+	// Course contains the detailed course information and content
+	Course CourseInfo `json:"course"`
+	// LabelSet contains customized labels used in the course
+	LabelSet LabelSet `json:"labelSet"`
+}
+
+// CourseInfo contains the main details and content of an Articulate Rise course.
+type CourseInfo struct {
+	// ID is the internal unique identifier for the course
+	ID string `json:"id"`
+	// Title is the name of the course
+	Title string `json:"title"`
+	// Description is the course summary or introduction text
+	Description string `json:"description"`
+	// Color is the theme color of the course
+	Color string `json:"color"`
+	// NavigationMode specifies how users navigate through the course
+	NavigationMode string `json:"navigationMode"`
+	// Lessons is an ordered array of all lessons in the course
+	Lessons []Lesson `json:"lessons"`
+	// CoverImage is the main image displayed for the course
+	CoverImage *Media `json:"coverImage,omitempty"`
+	// ExportSettings contains configuration for exporting the course
+	ExportSettings *ExportSettings `json:"exportSettings,omitempty"`
+}
+
+// ExportSettings defines configuration options for exporting a course.
+type ExportSettings struct {
+	// Title specifies the export title which might differ from course title
+	Title string `json:"title"`
+	// Format indicates the preferred export format
+	Format string `json:"format"`
+}
+
+// LabelSet contains customized labels used throughout the course.
+// This allows course creators to modify standard terminology.
+type LabelSet struct {
+	// ID is the unique identifier for this label set
+	ID string `json:"id"`
+	// Name is the descriptive name of the label set
+	Name string `json:"name"`
+	// Labels is a mapping of label keys to their customized values
+	Labels map[string]string `json:"labels"`
+}

internal/models/lesson.go

@@ -0,0 +1,96 @@
+// Package models defines the data structures representing Articulate Rise courses.
+// These structures closely match the JSON format used by Articulate Rise.
+package models
+
+// Lesson represents a single lesson or section within an Articulate Rise course.
+// Lessons are the main organizational units and contain various content items.
+type Lesson struct {
+	// ID is the unique identifier for the lesson
+	ID string `json:"id"`
+	// Title is the name of the lesson
+	Title string `json:"title"`
+	// Description is the introductory text for the lesson
+	Description string `json:"description"`
+	// Type indicates whether this is a regular lesson or a section header
+	Type string `json:"type"`
+	// Icon is the identifier for the icon displayed with this lesson
+	Icon string `json:"icon"`
+	// Items is an ordered array of content items within the lesson
+	Items []Item `json:"items"`
+	// Position stores the ordering information for the lesson
+	Position interface{} `json:"position"`
+	// Ready indicates whether the lesson is marked as complete
+	Ready bool `json:"ready"`
+	// CreatedAt is the timestamp when the lesson was created
+	CreatedAt string `json:"createdAt"`
+	// UpdatedAt is the timestamp when the lesson was last modified
+	UpdatedAt string `json:"updatedAt"`
+}
+
+// Item represents a content block within a lesson.
+// Items can be of various types such as text, multimedia, knowledge checks, etc.
+type Item struct {
+	// ID is the unique identifier for the item
+	ID string `json:"id"`
+	// Type indicates the kind of content (text, image, knowledge check, etc.)
+	Type string `json:"type"`
+	// Family groups similar item types together
+	Family string `json:"family"`
+	// Variant specifies a sub-type within the main type
+	Variant string `json:"variant"`
+	// Items contains the actual content elements (sub-items) of this item
+	Items []SubItem `json:"items"`
+	// Settings contains configuration options specific to this item type
+	Settings interface{} `json:"settings"`
+	// Data contains additional structured data for the item
+	Data interface{} `json:"data"`
+	// Media contains any associated media for the item
+	Media *Media `json:"media,omitempty"`
+}
+
+// SubItem represents a specific content element within an Item.
+// SubItems are the most granular content units like paragraphs, headings, or answers.
+type SubItem struct {
+	// ID is the unique identifier for the sub-item
+	ID string `json:"id"`
+	// Type indicates the specific kind of sub-item
+	Type string `json:"type,omitempty"`
+	// Title is the name or label of the sub-item
+	Title string `json:"title,omitempty"`
+	// Heading is a heading text for this sub-item
+	Heading string `json:"heading,omitempty"`
+	// Paragraph contains regular text content
+	Paragraph string `json:"paragraph,omitempty"`
+	// Caption is text associated with media elements
+	Caption string `json:"caption,omitempty"`
+	// Media contains any associated images or videos
+	Media *Media `json:"media,omitempty"`
+	// Answers contains possible answers for question-type sub-items
+	Answers []Answer `json:"answers,omitempty"`
+	// Feedback is the response shown after user interaction
+	Feedback string `json:"feedback,omitempty"`
+	// Front contains content for the front side of a card-type sub-item
+	Front *CardSide `json:"front,omitempty"`
+	// Back contains content for the back side of a card-type sub-item
+	Back *CardSide `json:"back,omitempty"`
+}
+
+// Answer represents a possible response in a knowledge check or quiz item.
+type Answer struct {
+	// ID is the unique identifier for the answer
+	ID string `json:"id"`
+	// Title is the text of the answer option
+	Title string `json:"title"`
+	// Correct indicates whether this is the right answer
+	Correct bool `json:"correct"`
+	// MatchTitle is used in matching-type questions to pair answers
+	MatchTitle string `json:"matchTitle,omitempty"`
+}
+
+// CardSide represents one side of a flipcard-type content element.
+type CardSide struct {
+	// Media is the image or video associated with this side of the card
+	Media *Media `json:"media,omitempty"`
+	// Description is the text content for this side of the card
+	Description string `json:"description,omitempty"`
+}

internal/models/media.go

@@ -0,0 +1,50 @@
+// Package models defines the data structures representing Articulate Rise courses.
+// These structures closely match the JSON format used by Articulate Rise.
+package models
+
+// Media represents a media element that can be either an image or a video.
+// Only one of the fields (Image or Video) will be populated at a time.
+type Media struct {
+	// Image contains metadata for an image element
+	Image *ImageMedia `json:"image,omitempty"`
+	// Video contains metadata for a video element
+	Video *VideoMedia `json:"video,omitempty"`
+}
+
+// ImageMedia contains the metadata and properties of an image.
+type ImageMedia struct {
+	// Key is the unique identifier for the image in the Articulate system
+	Key string `json:"key"`
+	// Type indicates the image format (jpg, png, etc.)
+	Type string `json:"type"`
+	// Width is the pixel width of the image
+	Width int `json:"width,omitempty"`
+	// Height is the pixel height of the image
+	Height int `json:"height,omitempty"`
+	// CrushedKey is the identifier for a compressed version of the image
+	CrushedKey string `json:"crushedKey,omitempty"`
+	// OriginalUrl is the URL to the full-resolution image
+	OriginalUrl string `json:"originalUrl"`
+	// UseCrushedKey indicates whether to use the compressed version
+	UseCrushedKey bool `json:"useCrushedKey,omitempty"`
+}
+
+// VideoMedia contains the metadata and properties of a video.
+type VideoMedia struct {
+	// Key is the unique identifier for the video in the Articulate system
+	Key string `json:"key"`
+	// URL is the direct link to the video content
+	URL string `json:"url"`
+	// Type indicates the video format (mp4, webm, etc.)
+	Type string `json:"type"`
+	// Poster is the URL to the static thumbnail image for the video
+	Poster string `json:"poster,omitempty"`
+	// Duration is the length of the video in seconds
+	Duration int `json:"duration,omitempty"`
+	// InputKey is the original identifier for uploaded videos
+	InputKey string `json:"inputKey,omitempty"`
+	// Thumbnail is the URL to a smaller preview image
+	Thumbnail string `json:"thumbnail,omitempty"`
+	// OriginalUrl is the URL to the source video file
+	OriginalUrl string `json:"originalUrl"`
+}

internal/models/models_test.go

@@ -0,0 +1,790 @@
+// Package models_test provides tests for the data models.
+package models
+
+import (
+	"encoding/json"
+	"reflect"
+	"testing"
+)
+
+// TestCourse_JSONMarshalUnmarshal tests JSON marshaling and unmarshaling of Course.
+func TestCourse_JSONMarshalUnmarshal(t *testing.T) {
+	original := Course{
+		ShareID: "test-share-id",
+		Author:  "Test Author",
+		Course: CourseInfo{
+			ID:             "course-123",
+			Title:          "Test Course",
+			Description:    "A test course description",
+			Color:          "#FF5733",
+			NavigationMode: "menu",
+			Lessons: []Lesson{
+				{
+					ID:          "lesson-1",
+					Title:       "First Lesson",
+					Description: "Lesson description",
+					Type:        "lesson",
+					Icon:        "icon-1",
+					Ready:       true,
+					CreatedAt:   "2023-01-01T00:00:00Z",
+					UpdatedAt:   "2023-01-02T00:00:00Z",
+				},
+			},
+			ExportSettings: &ExportSettings{
+				Title:  "Export Title",
+				Format: "scorm",
+			},
+		},
+		LabelSet: LabelSet{
+			ID:   "labelset-1",
+			Name: "Test Labels",
+		},
+	}
+
+	// Marshal to JSON
+	jsonData, err := json.Marshal(original)
+	if err != nil {
+		t.Fatalf("Failed to marshal Course to JSON: %v", err)
+	}
+
+	// Unmarshal from JSON
+	var unmarshaled Course
+	err = json.Unmarshal(jsonData, &unmarshaled)
+	if err != nil {
+		t.Fatalf("Failed to unmarshal Course from JSON: %v", err)
+	}
+
+	// Compare structures
+	if !reflect.DeepEqual(original, unmarshaled) {
+		t.Errorf("Marshaled and unmarshaled Course structs do not match")
+		t.Logf("Original: %+v", original)
+		t.Logf("Unmarshaled: %+v", unmarshaled)
+	}
+}
+
+// TestCourseInfo_JSONMarshalUnmarshal tests JSON marshaling and unmarshaling of CourseInfo.
+func TestCourseInfo_JSONMarshalUnmarshal(t *testing.T) {
+	original := CourseInfo{
+		ID:             "course-456",
+		Title:          "Another Test Course",
+		Description:    "Another test description",
+		Color:          "#33FF57",
+		NavigationMode: "linear",
+		Lessons: []Lesson{
+			{
+				ID:    "lesson-2",
+				Title: "Second Lesson",
+				Type:  "section",
+				Items: []Item{
+					{
+						ID:      "item-1",
+						Type:    "text",
+						Family:  "text",
+						Variant: "paragraph",
+						Items: []SubItem{
+							{
+								Title:     "Sub Item Title",
+								Heading:   "Sub Item Heading",
+								Paragraph: "Sub item paragraph content",
+							},
+						},
+					},
+				},
+			},
+		},
+		CoverImage: &Media{
+			Image: &ImageMedia{
+				Key:         "img-123",
+				Type:        "jpg",
+				Width:       800,
+				Height:      600,
+				OriginalUrl: "https://example.com/image.jpg",
+			},
+		},
+	}
+
+	// Marshal to JSON
+	jsonData, err := json.Marshal(original)
+	if err != nil {
+		t.Fatalf("Failed to marshal CourseInfo to JSON: %v", err)
+	}
+
+	// Unmarshal from JSON
+	var unmarshaled CourseInfo
+	err = json.Unmarshal(jsonData, &unmarshaled)
+	if err != nil {
+		t.Fatalf("Failed to unmarshal CourseInfo from JSON: %v", err)
+	}
+
+	// Compare structures
+	if !reflect.DeepEqual(original, unmarshaled) {
+		t.Errorf("Marshaled and unmarshaled CourseInfo structs do not match")
+	}
+}
+
+// TestLesson_JSONMarshalUnmarshal tests JSON marshaling and unmarshaling of Lesson.
+func TestLesson_JSONMarshalUnmarshal(t *testing.T) {
+	original := Lesson{
+		ID:          "lesson-test",
+		Title:       "Test Lesson",
+		Description: "Test lesson description",
+		Type:        "lesson",
+		Icon:        "lesson-icon",
+		Ready:       true,
+		CreatedAt:   "2023-06-01T12:00:00Z",
+		UpdatedAt:   "2023-06-01T13:00:00Z",
+		Position:    map[string]interface{}{"x": 1, "y": 2},
+		Items: []Item{
+			{
+				ID:      "item-test",
+				Type:    "multimedia",
+				Family:  "media",
+				Variant: "video",
+				Items: []SubItem{
+					{
+						Caption: "Video caption",
+						Media: &Media{
+							Video: &VideoMedia{
+								Key:         "video-123",
+								URL:         "https://example.com/video.mp4",
+								Type:        "mp4",
+								Duration:    120,
+								OriginalUrl: "https://example.com/video.mp4",
+							},
+						},
+					},
+				},
+				Settings: map[string]interface{}{"autoplay": false},
+				Data:     map[string]interface{}{"metadata": "test"},
+			},
+		},
+	}
+
+	// Marshal to JSON
+	jsonData, err := json.Marshal(original)
+	if err != nil {
+		t.Fatalf("Failed to marshal Lesson to JSON: %v", err)
+	}
+
+	// Unmarshal from JSON
+	var unmarshaled Lesson
+	err = json.Unmarshal(jsonData, &unmarshaled)
+	if err != nil {
+		t.Fatalf("Failed to unmarshal Lesson from JSON: %v", err)
+	}
+
+	// Compare structures
+	if !compareLessons(original, unmarshaled) {
+		t.Errorf("Marshaled and unmarshaled Lesson structs do not match")
+	}
+}
+
+// TestItem_JSONMarshalUnmarshal tests JSON marshaling and unmarshaling of Item.
+func TestItem_JSONMarshalUnmarshal(t *testing.T) {
+	original := Item{
+		ID:      "item-json-test",
+		Type:    "knowledgeCheck",
+		Family:  "assessment",
+		Variant: "multipleChoice",
+		Items: []SubItem{
+			{
+				Title: "What is the answer?",
+				Answers: []Answer{
+					{Title: "Option A", Correct: false},
+					{Title: "Option B", Correct: true},
+					{Title: "Option C", Correct: false},
+				},
+				Feedback: "Well done!",
+			},
+		},
+		Settings: map[string]interface{}{
+			"allowRetry": true,
+			"showAnswer": true,
+		},
+		Data: map[string]interface{}{
+			"points": 10,
+			"weight": 1.5,
+		},
+	}
+
+	// Marshal to JSON
+	jsonData, err := json.Marshal(original)
+	if err != nil {
+		t.Fatalf("Failed to marshal Item to JSON: %v", err)
+	}
+
+	// Unmarshal from JSON
+	var unmarshaled Item
+	err = json.Unmarshal(jsonData, &unmarshaled)
+	if err != nil {
+		t.Fatalf("Failed to unmarshal Item from JSON: %v", err)
+	}
+
+	// Compare structures
+	if !compareItem(original, unmarshaled) {
+		t.Errorf("Marshaled and unmarshaled Item structs do not match")
+	}
+}
+
+// TestSubItem_JSONMarshalUnmarshal tests JSON marshaling and unmarshaling of SubItem.
+func TestSubItem_JSONMarshalUnmarshal(t *testing.T) {
+	original := SubItem{
+		Title:     "Test SubItem Title",
+		Heading:   "Test SubItem Heading",
+		Paragraph: "Test paragraph with content",
+		Caption:   "Test caption",
+		Feedback:  "Test feedback message",
+		Answers: []Answer{
+			{Title: "First answer", Correct: true},
+			{Title: "Second answer", Correct: false},
+		},
+		Media: &Media{
+			Image: &ImageMedia{
+				Key:           "subitem-img",
+				Type:          "png",
+				Width:         400,
+				Height:        300,
+				OriginalUrl:   "https://example.com/subitem.png",
+				CrushedKey:    "crushed-123",
+				UseCrushedKey: true,
+			},
+		},
+	}
+
+	// Marshal to JSON
+	jsonData, err := json.Marshal(original)
+	if err != nil {
+		t.Fatalf("Failed to marshal SubItem to JSON: %v", err)
+	}
+
+	// Unmarshal from JSON
+	var unmarshaled SubItem
+	err = json.Unmarshal(jsonData, &unmarshaled)
+	if err != nil {
+		t.Fatalf("Failed to unmarshal SubItem from JSON: %v", err)
+	}
+
+	// Compare structures
+	if !reflect.DeepEqual(original, unmarshaled) {
+		t.Errorf("Marshaled and unmarshaled SubItem structs do not match")
+	}
+}
+
+// TestAnswer_JSONMarshalUnmarshal tests JSON marshaling and unmarshaling of Answer.
+func TestAnswer_JSONMarshalUnmarshal(t *testing.T) {
+	original := Answer{
+		Title:   "Test answer text",
+		Correct: true,
+	}
+
+	// Marshal to JSON
+	jsonData, err := json.Marshal(original)
+	if err != nil {
+		t.Fatalf("Failed to marshal Answer to JSON: %v", err)
+	}
+
+	// Unmarshal from JSON
+	var unmarshaled Answer
+	err = json.Unmarshal(jsonData, &unmarshaled)
+	if err != nil {
+		t.Fatalf("Failed to unmarshal Answer from JSON: %v", err)
+	}
+
+	// Compare structures
+	if !reflect.DeepEqual(original, unmarshaled) {
+		t.Errorf("Marshaled and unmarshaled Answer structs do not match")
+	}
+}
+
+// TestMedia_JSONMarshalUnmarshal tests JSON marshaling and unmarshaling of Media.
+func TestMedia_JSONMarshalUnmarshal(t *testing.T) {
+	// Test with Image
+	originalImage := Media{
+		Image: &ImageMedia{
+			Key:           "media-img-test",
+			Type:          "jpeg",
+			Width:         1200,
+			Height:        800,
+			OriginalUrl:   "https://example.com/media.jpg",
+			CrushedKey:    "crushed-media",
+			UseCrushedKey: false,
+		},
+	}
+
+	jsonData, err := json.Marshal(originalImage)
+	if err != nil {
+		t.Fatalf("Failed to marshal Media with Image to JSON: %v", err)
+	}
+
+	var unmarshaledImage Media
+	err = json.Unmarshal(jsonData, &unmarshaledImage)
+	if err != nil {
+		t.Fatalf("Failed to unmarshal Media with Image from JSON: %v", err)
+	}
+
+	if !reflect.DeepEqual(originalImage, unmarshaledImage) {
+		t.Errorf("Marshaled and unmarshaled Media with Image do not match")
+	}
+
+	// Test with Video
+	originalVideo := Media{
+		Video: &VideoMedia{
+			Key:         "media-video-test",
+			URL:         "https://example.com/media.mp4",
+			Type:        "mp4",
+			Duration:    300,
+			Poster:      "https://example.com/poster.jpg",
+			Thumbnail:   "https://example.com/thumb.jpg",
+			InputKey:    "input-123",
+			OriginalUrl: "https://example.com/original.mp4",
+		},
+	}
+
+	jsonData, err = json.Marshal(originalVideo)
+	if err != nil {
+		t.Fatalf("Failed to marshal Media with Video to JSON: %v", err)
+	}
+
+	var unmarshaledVideo Media
+	err = json.Unmarshal(jsonData, &unmarshaledVideo)
+	if err != nil {
+		t.Fatalf("Failed to unmarshal Media with Video from JSON: %v", err)
+	}
+
+	if !reflect.DeepEqual(originalVideo, unmarshaledVideo) {
+		t.Errorf("Marshaled and unmarshaled Media with Video do not match")
+	}
+}
+
+// TestImageMedia_JSONMarshalUnmarshal tests JSON marshaling and unmarshaling of ImageMedia.
+func TestImageMedia_JSONMarshalUnmarshal(t *testing.T) {
+	original := ImageMedia{
+		Key:           "image-media-test",
+		Type:          "gif",
+		Width:         640,
+		Height:        480,
+		OriginalUrl:   "https://example.com/image.gif",
+		CrushedKey:    "crushed-gif",
+		UseCrushedKey: true,
+	}
+
+	// Marshal to JSON
+	jsonData, err := json.Marshal(original)
+	if err != nil {
+		t.Fatalf("Failed to marshal ImageMedia to JSON: %v", err)
+	}
+
+	// Unmarshal from JSON
+	var unmarshaled ImageMedia
+	err = json.Unmarshal(jsonData, &unmarshaled)
+	if err != nil {
+		t.Fatalf("Failed to unmarshal ImageMedia from JSON: %v", err)
+	}
+
+	// Compare structures
+	if !reflect.DeepEqual(original, unmarshaled) {
+		t.Errorf("Marshaled and unmarshaled ImageMedia structs do not match")
+	}
+}
+
+// TestVideoMedia_JSONMarshalUnmarshal tests JSON marshaling and unmarshaling of VideoMedia.
+func TestVideoMedia_JSONMarshalUnmarshal(t *testing.T) {
+	original := VideoMedia{
+		Key:         "video-media-test",
+		URL:         "https://example.com/video.webm",
+		Type:        "webm",
+		Duration:    450,
+		Poster:      "https://example.com/poster.jpg",
+		Thumbnail:   "https://example.com/thumbnail.jpg",
+		InputKey:    "upload-456",
+		OriginalUrl: "https://example.com/original.webm",
+	}
+
+	// Marshal to JSON
+	jsonData, err := json.Marshal(original)
+	if err != nil {
+		t.Fatalf("Failed to marshal VideoMedia to JSON: %v", err)
+	}
+
+	// Unmarshal from JSON
+	var unmarshaled VideoMedia
+	err = json.Unmarshal(jsonData, &unmarshaled)
+	if err != nil {
+		t.Fatalf("Failed to unmarshal VideoMedia from JSON: %v", err)
+	}
+
+	// Compare structures
+	if !reflect.DeepEqual(original, unmarshaled) {
+		t.Errorf("Marshaled and unmarshaled VideoMedia structs do not match")
+	}
+}
+
+// TestExportSettings_JSONMarshalUnmarshal tests JSON marshaling and unmarshaling of ExportSettings.
+func TestExportSettings_JSONMarshalUnmarshal(t *testing.T) {
+	original := ExportSettings{
+		Title:  "Custom Export Title",
+		Format: "xAPI",
+	}
+
+	// Marshal to JSON
+	jsonData, err := json.Marshal(original)
+	if err != nil {
+		t.Fatalf("Failed to marshal ExportSettings to JSON: %v", err)
+	}
+
+	// Unmarshal from JSON
+	var unmarshaled ExportSettings
+	err = json.Unmarshal(jsonData, &unmarshaled)
+	if err != nil {
+		t.Fatalf("Failed to unmarshal ExportSettings from JSON: %v", err)
+	}
+
+	// Compare structures
+	if !reflect.DeepEqual(original, unmarshaled) {
+		t.Errorf("Marshaled and unmarshaled ExportSettings structs do not match")
+	}
+}
+
+// TestLabelSet_JSONMarshalUnmarshal tests JSON marshaling and unmarshaling of LabelSet.
+func TestLabelSet_JSONMarshalUnmarshal(t *testing.T) {
+	original := LabelSet{
+		ID:   "labelset-test",
+		Name: "Test Label Set",
+	}
+
+	// Marshal to JSON
+	jsonData, err := json.Marshal(original)
+	if err != nil {
+		t.Fatalf("Failed to marshal LabelSet to JSON: %v", err)
+	}
+
+	// Unmarshal from JSON
+	var unmarshaled LabelSet
+	err = json.Unmarshal(jsonData, &unmarshaled)
+	if err != nil {
+		t.Fatalf("Failed to unmarshal LabelSet from JSON: %v", err)
+	}
+
+	// Compare structures
+	if !reflect.DeepEqual(original, unmarshaled) {
+		t.Errorf("Marshaled and unmarshaled LabelSet structs do not match")
+	}
+}
+
+// TestEmptyStructures tests marshaling and unmarshaling of empty structures.
+func TestEmptyStructures(t *testing.T) {
+	testCases := []struct {
+		name string
+		data interface{}
+	}{
+		{"Empty Course", Course{}},
+		{"Empty CourseInfo", CourseInfo{}},
+		{"Empty Lesson", Lesson{}},
+		{"Empty Item", Item{}},
+		{"Empty SubItem", SubItem{}},
+		{"Empty Answer", Answer{}},
+		{"Empty Media", Media{}},
+		{"Empty ImageMedia", ImageMedia{}},
+		{"Empty VideoMedia", VideoMedia{}},
+		{"Empty ExportSettings", ExportSettings{}},
+		{"Empty LabelSet", LabelSet{}},
+	}
+
+	for _, tc := range testCases {
+		t.Run(tc.name, func(t *testing.T) {
+			// Marshal to JSON
+			jsonData, err := json.Marshal(tc.data)
+			if err != nil {
+				t.Fatalf("Failed to marshal %s to JSON: %v", tc.name, err)
+			}
+
+			// Unmarshal from JSON
+			result := reflect.New(reflect.TypeOf(tc.data)).Interface()
+			err = json.Unmarshal(jsonData, result)
+			if err != nil {
+				t.Fatalf("Failed to unmarshal %s from JSON: %v", tc.name, err)
+			}
+
+			// Basic validation that no errors occurred
+			if len(jsonData) == 0 {
+				t.Errorf("%s should produce some JSON output", tc.name)
+			}
+		})
+	}
+}
+
+// TestNilPointerSafety tests that nil pointers in optional fields are handled correctly.
+func TestNilPointerSafety(t *testing.T) {
+	course := Course{
+		ShareID: "nil-test",
+		Course: CourseInfo{
+			ID:             "nil-course",
+			Title:          "Nil Pointer Test",
+			CoverImage:     nil, // Test nil pointer
+			ExportSettings: nil, // Test nil pointer
+			Lessons: []Lesson{
+				{
+					ID:    "lesson-nil",
+					Title: "Lesson with nil media",
+					Items: []Item{
+						{
+							ID:   "item-nil",
+							Type: "text",
+							Items: []SubItem{
+								{
+									Title: "SubItem with nil media",
+									Media: nil, // Test nil pointer
+								},
+							},
+							Media: nil, // Test nil pointer
+						},
+					},
+				},
+			},
+		},
+	}
+
+	// Marshal to JSON
+	jsonData, err := json.Marshal(course)
+	if err != nil {
+		t.Fatalf("Failed to marshal Course with nil pointers to JSON: %v", err)
+	}
+
+	// Unmarshal from JSON
+	var unmarshaled Course
+	err = json.Unmarshal(jsonData, &unmarshaled)
+	if err != nil {
+		t.Fatalf("Failed to unmarshal Course with nil pointers from JSON: %v", err)
+	}
+
+	// Basic validation
+	if unmarshaled.ShareID != "nil-test" {
+		t.Error("ShareID should be preserved")
+	}
+	if unmarshaled.Course.Title != "Nil Pointer Test" {
+		t.Error("Course title should be preserved")
+	}
+}
+
+// TestJSONTagsPresence tests that JSON tags are properly defined.
+func TestJSONTagsPresence(t *testing.T) {
+	// Test that important fields have JSON tags
+	courseType := reflect.TypeOf(Course{})
+	if courseType.Kind() == reflect.Struct {
+		field, found := courseType.FieldByName("ShareID")
+		if !found {
+			t.Error("ShareID field not found")
+		} else {
+			tag := field.Tag.Get("json")
+			if tag == "" {
+				t.Error("ShareID should have json tag")
+			}
+			if tag != "shareId" {
+				t.Errorf("ShareID json tag should be 'shareId', got '%s'", tag)
+			}
+		}
+	}
+
+	// Test CourseInfo
+	courseInfoType := reflect.TypeOf(CourseInfo{})
+	if courseInfoType.Kind() == reflect.Struct {
+		field, found := courseInfoType.FieldByName("NavigationMode")
+		if !found {
+			t.Error("NavigationMode field not found")
+		} else {
+			tag := field.Tag.Get("json")
+			if tag == "" {
+				t.Error("NavigationMode should have json tag")
+			}
+		}
+	}
+}
+
+// BenchmarkCourse_JSONMarshal benchmarks JSON marshaling of Course.
+func BenchmarkCourse_JSONMarshal(b *testing.B) {
+	course := Course{
+		ShareID: "benchmark-id",
+		Author:  "Benchmark Author",
+		Course: CourseInfo{
+			ID:    "benchmark-course",
+			Title: "Benchmark Course",
+			Lessons: []Lesson{
+				{
+					ID:    "lesson-1",
+					Title: "Lesson 1",
+					Items: []Item{
+						{
+							ID:   "item-1",
+							Type: "text",
+							Items: []SubItem{
+								{Title: "SubItem 1"},
+							},
+						},
+					},
+				},
+			},
+		},
+	}
+
+	b.ResetTimer()
+	for i := 0; i < b.N; i++ {
+		_, _ = json.Marshal(course)
+	}
+}
+
+// BenchmarkCourse_JSONUnmarshal benchmarks JSON unmarshaling of Course.
+func BenchmarkCourse_JSONUnmarshal(b *testing.B) {
+	course := Course{
+		ShareID: "benchmark-id",
+		Author:  "Benchmark Author",
+		Course: CourseInfo{
+			ID:    "benchmark-course",
+			Title: "Benchmark Course",
+			Lessons: []Lesson{
+				{
+					ID:    "lesson-1",
+					Title: "Lesson 1",
+					Items: []Item{
+						{
+							ID:   "item-1",
+							Type: "text",
+							Items: []SubItem{
+								{Title: "SubItem 1"},
+							},
+						},
+					},
+				},
+			},
+		},
+	}
+
+	jsonData, _ := json.Marshal(course)
+
+	b.ResetTimer()
+	for i := 0; i < b.N; i++ {
+		var result Course
+		_ = json.Unmarshal(jsonData, &result)
+	}
+}
+
+// compareMaps compares two interface{} values that should be maps
+func compareMaps(original, unmarshaled interface{}) bool {
+	origMap, origOk := original.(map[string]interface{})
+	unMap, unOk := unmarshaled.(map[string]interface{})
+
+	if !origOk || !unOk {
+		// If not maps, use deep equal
+		return reflect.DeepEqual(original, unmarshaled)
+	}
+
+	if len(origMap) != len(unMap) {
+		return false
+	}
+
+	for key, origVal := range origMap {
+		unVal, exists := unMap[key]
+		if !exists {
+			return false
+		}
+
+		// Handle numeric type conversion from JSON
+		switch origVal := origVal.(type) {
+		case int:
+			if unFloat, ok := unVal.(float64); ok {
+				if float64(origVal) != unFloat {
+					return false
+				}
+			} else {
+				return false
+			}
+		case float64:
+			if unFloat, ok := unVal.(float64); ok {
+				if origVal != unFloat {
+					return false
+				}
+			} else {
+				return false
+			}
+		default:
+			if !reflect.DeepEqual(origVal, unVal) {
+				return false
+			}
+		}
+	}
+	return true
+}
+
+// compareLessons compares two Lesson structs accounting for JSON type conversion
+func compareLessons(original, unmarshaled Lesson) bool {
+	// Compare all fields except Position and Items
+	if original.ID != unmarshaled.ID ||
+		original.Title != unmarshaled.Title ||
+		original.Description != unmarshaled.Description ||
+		original.Type != unmarshaled.Type ||
+		original.Icon != unmarshaled.Icon ||
+		original.Ready != unmarshaled.Ready ||
+		original.CreatedAt != unmarshaled.CreatedAt ||
+		original.UpdatedAt != unmarshaled.UpdatedAt {
+		return false
+	}
+
+	// Compare Position
+	if !compareMaps(original.Position, unmarshaled.Position) {
+		return false
+	}
+
+	// Compare Items
+	return compareItems(original.Items, unmarshaled.Items)
+}
+
+// compareItems compares two Item slices accounting for JSON type conversion
+func compareItems(original, unmarshaled []Item) bool {
+	if len(original) != len(unmarshaled) {
+		return false
+	}
+
+	for i := range original {
+		if !compareItem(original[i], unmarshaled[i]) {
+			return false
+		}
+	}
+	return true
+}
+
+// compareItem compares two Item structs accounting for JSON type conversion
+func compareItem(original, unmarshaled Item) bool {
+	// Compare basic fields
+	if original.ID != unmarshaled.ID ||
+		original.Type != unmarshaled.Type ||
+		original.Family != unmarshaled.Family ||
+		original.Variant != unmarshaled.Variant {
+		return false
+	}
+
+	// Compare Settings and Data
+	if !compareMaps(original.Settings, unmarshaled.Settings) {
+		return false
+	}
+
+	if !compareMaps(original.Data, unmarshaled.Data) {
+		return false
+	}
+
+	// Compare Items (SubItems)
+	if len(original.Items) != len(unmarshaled.Items) {
+		return false
+	}
+
+	for i := range original.Items {
+		if !reflect.DeepEqual(original.Items[i], unmarshaled.Items[i]) {
+			return false
+		}
+	}
+
+	// Compare Media
+	if !reflect.DeepEqual(original.Media, unmarshaled.Media) {
+		return false
+	}
+
+	return true
+}

internal/services/app.go

@@ -0,0 +1,76 @@
+// Package services provides the core functionality for the articulate-parser application.
+// It implements the interfaces defined in the interfaces package.
+package services
+
+import (
+	"fmt"
+
+	"github.com/kjanat/articulate-parser/internal/interfaces"
+	"github.com/kjanat/articulate-parser/internal/models"
+)
+
+// App represents the main application service that coordinates the parsing
+// and exporting of Articulate Rise courses. It serves as the primary entry
+// point for the application's functionality.
+type App struct {
+	// parser is responsible for loading course data from files or URLs
+	parser interfaces.CourseParser
+	// exporterFactory creates the appropriate exporter for a given format
+	exporterFactory interfaces.ExporterFactory
+}
+
+// NewApp creates a new application instance with dependency injection.
+// It takes a CourseParser for loading courses and an ExporterFactory for
+// creating the appropriate exporters.
+func NewApp(parser interfaces.CourseParser, exporterFactory interfaces.ExporterFactory) *App {
+	return &App{
+		parser:          parser,
+		exporterFactory: exporterFactory,
+	}
+}
+
+// ProcessCourseFromFile loads a course from a local file and exports it to the specified format.
+// It takes the path to the course file, the desired export format, and the output file path.
+// Returns an error if loading or exporting fails.
+func (a *App) ProcessCourseFromFile(filePath, format, outputPath string) error {
+	course, err := a.parser.LoadCourseFromFile(filePath)
+	if err != nil {
+		return fmt.Errorf("failed to load course from file: %w", err)
+	}
+
+	return a.exportCourse(course, format, outputPath)
+}
+
+// ProcessCourseFromURI fetches a course from the provided URI and exports it to the specified format.
+// It takes the URI to fetch the course from, the desired export format, and the output file path.
+// Returns an error if fetching or exporting fails.
+func (a *App) ProcessCourseFromURI(uri, format, outputPath string) error {
+	course, err := a.parser.FetchCourse(uri)
+	if err != nil {
+		return fmt.Errorf("failed to fetch course: %w", err)
+	}
+
+	return a.exportCourse(course, format, outputPath)
+}
+
+// exportCourse exports a course to the specified format and output path.
+// It's a helper method that creates the appropriate exporter and performs the export.
+// Returns an error if creating the exporter or exporting the course fails.
+func (a *App) exportCourse(course *models.Course, format, outputPath string) error {
+	exporter, err := a.exporterFactory.CreateExporter(format)
+	if err != nil {
+		return fmt.Errorf("failed to create exporter: %w", err)
+	}
+
+	if err := exporter.Export(course, outputPath); err != nil {
+		return fmt.Errorf("failed to export course: %w", err)
+	}
+
+	return nil
+}
+
+// GetSupportedFormats returns a list of all export formats supported by the application.
+// This information is provided by the ExporterFactory.
+func (a *App) GetSupportedFormats() []string {
+	return a.exporterFactory.GetSupportedFormats()
+}

internal/services/app_test.go

@@ -0,0 +1,353 @@
+// Package services_test provides tests for the services package.
+package services
+
+import (
+	"errors"
+	"testing"
+
+	"github.com/kjanat/articulate-parser/internal/interfaces"
+	"github.com/kjanat/articulate-parser/internal/models"
+)
+
+// MockCourseParser is a mock implementation of interfaces.CourseParser for testing.
+type MockCourseParser struct {
+	mockFetchCourse        func(uri string) (*models.Course, error)
+	mockLoadCourseFromFile func(filePath string) (*models.Course, error)
+}
+
+func (m *MockCourseParser) FetchCourse(uri string) (*models.Course, error) {
+	if m.mockFetchCourse != nil {
+		return m.mockFetchCourse(uri)
+	}
+	return nil, errors.New("not implemented")
+}
+
+func (m *MockCourseParser) LoadCourseFromFile(filePath string) (*models.Course, error) {
+	if m.mockLoadCourseFromFile != nil {
+		return m.mockLoadCourseFromFile(filePath)
+	}
+	return nil, errors.New("not implemented")
+}
+
+// MockExporter is a mock implementation of interfaces.Exporter for testing.
+type MockExporter struct {
+	mockExport             func(course *models.Course, outputPath string) error
+	mockGetSupportedFormat func() string
+}
+
+func (m *MockExporter) Export(course *models.Course, outputPath string) error {
+	if m.mockExport != nil {
+		return m.mockExport(course, outputPath)
+	}
+	return nil
+}
+
+func (m *MockExporter) GetSupportedFormat() string {
+	if m.mockGetSupportedFormat != nil {
+		return m.mockGetSupportedFormat()
+	}
+	return "mock"
+}
+
+// MockExporterFactory is a mock implementation of interfaces.ExporterFactory for testing.
+type MockExporterFactory struct {
+	mockCreateExporter      func(format string) (*MockExporter, error)
+	mockGetSupportedFormats func() []string
+}
+
+func (m *MockExporterFactory) CreateExporter(format string) (interfaces.Exporter, error) {
+	if m.mockCreateExporter != nil {
+		exporter, err := m.mockCreateExporter(format)
+		return exporter, err
+	}
+	return &MockExporter{}, nil
+}
+
+func (m *MockExporterFactory) GetSupportedFormats() []string {
+	if m.mockGetSupportedFormats != nil {
+		return m.mockGetSupportedFormats()
+	}
+	return []string{"mock"}
+}
+
+// createTestCourse creates a sample course for testing purposes.
+func createTestCourse() *models.Course {
+	return &models.Course{
+		ShareID: "test-share-id",
+		Author:  "Test Author",
+		Course: models.CourseInfo{
+			ID:          "test-course-id",
+			Title:       "Test Course",
+			Description: "This is a test course",
+			Lessons: []models.Lesson{
+				{
+					ID:    "lesson-1",
+					Title: "Test Lesson",
+					Type:  "lesson",
+					Items: []models.Item{
+						{
+							ID:   "item-1",
+							Type: "text",
+							Items: []models.SubItem{
+								{
+									ID:        "subitem-1",
+									Title:     "Test Title",
+									Paragraph: "Test paragraph content",
+								},
+							},
+						},
+					},
+				},
+			},
+		},
+	}
+}
+
+// TestNewApp tests the NewApp constructor.
+func TestNewApp(t *testing.T) {
+	parser := &MockCourseParser{}
+	factory := &MockExporterFactory{}
+
+	app := NewApp(parser, factory)
+
+	if app == nil {
+		t.Fatal("NewApp() returned nil")
+	}
+
+	if app.parser != parser {
+		t.Error("App parser was not set correctly")
+	}
+
+	// Test that the factory is set (we can't directly compare interface values)
+	formats := app.GetSupportedFormats()
+	if len(formats) == 0 {
+		t.Error("App exporterFactory was not set correctly - no supported formats")
+	}
+}
+
+// TestApp_ProcessCourseFromFile tests the ProcessCourseFromFile method.
+func TestApp_ProcessCourseFromFile(t *testing.T) {
+	testCourse := createTestCourse()
+
+	tests := []struct {
+		name          string
+		filePath      string
+		format        string
+		outputPath    string
+		setupMocks    func(*MockCourseParser, *MockExporterFactory, *MockExporter)
+		expectedError string
+	}{
+		{
+			name:       "successful processing",
+			filePath:   "test.json",
+			format:     "markdown",
+			outputPath: "output.md",
+			setupMocks: func(parser *MockCourseParser, factory *MockExporterFactory, exporter *MockExporter) {
+				parser.mockLoadCourseFromFile = func(filePath string) (*models.Course, error) {
+					if filePath != "test.json" {
+						t.Errorf("Expected filePath 'test.json', got '%s'", filePath)
+					}
+					return testCourse, nil
+				}
+
+				factory.mockCreateExporter = func(format string) (*MockExporter, error) {
+					if format != "markdown" {
+						t.Errorf("Expected format 'markdown', got '%s'", format)
+					}
+					return exporter, nil
+				}
+
+				exporter.mockExport = func(course *models.Course, outputPath string) error {
+					if outputPath != "output.md" {
+						t.Errorf("Expected outputPath 'output.md', got '%s'", outputPath)
+					}
+					if course != testCourse {
+						t.Error("Expected course to match testCourse")
+					}
+					return nil
+				}
+			},
+		},
+		{
+			name:       "file loading error",
+			filePath:   "nonexistent.json",
+			format:     "markdown",
+			outputPath: "output.md",
+			setupMocks: func(parser *MockCourseParser, factory *MockExporterFactory, exporter *MockExporter) {
+				parser.mockLoadCourseFromFile = func(filePath string) (*models.Course, error) {
+					return nil, errors.New("file not found")
+				}
+			},
+			expectedError: "failed to load course from file",
+		},
+		{
+			name:       "exporter creation error",
+			filePath:   "test.json",
+			format:     "unsupported",
+			outputPath: "output.txt",
+			setupMocks: func(parser *MockCourseParser, factory *MockExporterFactory, exporter *MockExporter) {
+				parser.mockLoadCourseFromFile = func(filePath string) (*models.Course, error) {
+					return testCourse, nil
+				}
+
+				factory.mockCreateExporter = func(format string) (*MockExporter, error) {
+					return nil, errors.New("unsupported format")
+				}
+			},
+			expectedError: "failed to create exporter",
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			parser := &MockCourseParser{}
+			exporter := &MockExporter{}
+			factory := &MockExporterFactory{}
+
+			tt.setupMocks(parser, factory, exporter)
+
+			app := NewApp(parser, factory)
+			err := app.ProcessCourseFromFile(tt.filePath, tt.format, tt.outputPath)
+
+			if tt.expectedError != "" {
+				if err == nil {
+					t.Fatalf("Expected error containing '%s', got nil", tt.expectedError)
+				}
+				if !contains(err.Error(), tt.expectedError) {
+					t.Errorf("Expected error containing '%s', got '%s'", tt.expectedError, err.Error())
+				}
+			} else {
+				if err != nil {
+					t.Errorf("Expected no error, got: %v", err)
+				}
+			}
+		})
+	}
+}
+
+// TestApp_ProcessCourseFromURI tests the ProcessCourseFromURI method.
+func TestApp_ProcessCourseFromURI(t *testing.T) {
+	testCourse := createTestCourse()
+
+	tests := []struct {
+		name          string
+		uri           string
+		format        string
+		outputPath    string
+		setupMocks    func(*MockCourseParser, *MockExporterFactory, *MockExporter)
+		expectedError string
+	}{
+		{
+			name:       "successful processing",
+			uri:        "https://rise.articulate.com/share/test123",
+			format:     "docx",
+			outputPath: "output.docx",
+			setupMocks: func(parser *MockCourseParser, factory *MockExporterFactory, exporter *MockExporter) {
+				parser.mockFetchCourse = func(uri string) (*models.Course, error) {
+					if uri != "https://rise.articulate.com/share/test123" {
+						t.Errorf("Expected uri 'https://rise.articulate.com/share/test123', got '%s'", uri)
+					}
+					return testCourse, nil
+				}
+
+				factory.mockCreateExporter = func(format string) (*MockExporter, error) {
+					if format != "docx" {
+						t.Errorf("Expected format 'docx', got '%s'", format)
+					}
+					return exporter, nil
+				}
+
+				exporter.mockExport = func(course *models.Course, outputPath string) error {
+					if outputPath != "output.docx" {
+						t.Errorf("Expected outputPath 'output.docx', got '%s'", outputPath)
+					}
+					return nil
+				}
+			},
+		},
+		{
+			name:       "fetch error",
+			uri:        "invalid-uri",
+			format:     "docx",
+			outputPath: "output.docx",
+			setupMocks: func(parser *MockCourseParser, factory *MockExporterFactory, exporter *MockExporter) {
+				parser.mockFetchCourse = func(uri string) (*models.Course, error) {
+					return nil, errors.New("network error")
+				}
+			},
+			expectedError: "failed to fetch course",
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			parser := &MockCourseParser{}
+			exporter := &MockExporter{}
+			factory := &MockExporterFactory{}
+
+			tt.setupMocks(parser, factory, exporter)
+
+			app := NewApp(parser, factory)
+			err := app.ProcessCourseFromURI(tt.uri, tt.format, tt.outputPath)
+
+			if tt.expectedError != "" {
+				if err == nil {
+					t.Fatalf("Expected error containing '%s', got nil", tt.expectedError)
+				}
+				if !contains(err.Error(), tt.expectedError) {
+					t.Errorf("Expected error containing '%s', got '%s'", tt.expectedError, err.Error())
+				}
+			} else {
+				if err != nil {
+					t.Errorf("Expected no error, got: %v", err)
+				}
+			}
+		})
+	}
+}
+
+// TestApp_GetSupportedFormats tests the GetSupportedFormats method.
+func TestApp_GetSupportedFormats(t *testing.T) {
+	expectedFormats := []string{"markdown", "docx", "pdf"}
+
+	parser := &MockCourseParser{}
+	factory := &MockExporterFactory{
+		mockGetSupportedFormats: func() []string {
+			return expectedFormats
+		},
+	}
+
+	app := NewApp(parser, factory)
+	formats := app.GetSupportedFormats()
+
+	if len(formats) != len(expectedFormats) {
+		t.Errorf("Expected %d formats, got %d", len(expectedFormats), len(formats))
+	}
+
+	for i, format := range formats {
+		if format != expectedFormats[i] {
+			t.Errorf("Expected format '%s' at index %d, got '%s'", expectedFormats[i], i, format)
+		}
+	}
+}
+
+// contains checks if a string contains a substring.
+func contains(s, substr string) bool {
+	return len(s) >= len(substr) &&
+		(len(substr) == 0 ||
+			s == substr ||
+			(len(s) > len(substr) &&
+				(s[:len(substr)] == substr ||
+					s[len(s)-len(substr):] == substr ||
+					containsSubstring(s, substr))))
+}
+
+// containsSubstring checks if s contains substr as a substring.
+func containsSubstring(s, substr string) bool {
+	for i := 0; i <= len(s)-len(substr); i++ {
+		if s[i:i+len(substr)] == substr {
+			return true
+		}
+	}
+	return false
+}

internal/services/html_cleaner.go

@@ -0,0 +1,53 @@
+// Package services provides the core functionality for the articulate-parser application.
+// It implements the interfaces defined in the interfaces package.
+package services
+
+import (
+	"regexp"
+	"strings"
+)
+
+// HTMLCleaner provides utilities for converting HTML content to plain text.
+// It removes HTML tags while preserving their content and converts HTML entities
+// to their plain text equivalents.
+type HTMLCleaner struct{}
+
+// NewHTMLCleaner creates a new HTML cleaner instance.
+// This service is typically injected into exporters that need to handle
+// HTML content from Articulate Rise courses.
+func NewHTMLCleaner() *HTMLCleaner {
+	return &HTMLCleaner{}
+}
+
+// CleanHTML removes HTML tags and converts entities, returning clean plain text.
+// The function preserves the textual content of the HTML while removing markup.
+// It handles common HTML entities like  , &, etc., and normalizes whitespace.
+//
+// Parameters:
+//   - html: The HTML content to clean
+//
+// Returns:
+//   - A plain text string with all HTML elements and entities removed/converted
+func (h *HTMLCleaner) CleanHTML(html string) string {
+	// Remove HTML tags but preserve content
+	re := regexp.MustCompile(`<[^>]*>`)
+	cleaned := re.ReplaceAllString(html, "")
+
+	// Replace common HTML entities with their character equivalents
+	cleaned = strings.ReplaceAll(cleaned, "&nbsp;", " ")
+	cleaned = strings.ReplaceAll(cleaned, "&amp;", "&")
+	cleaned = strings.ReplaceAll(cleaned, "&lt;", "<")
+	cleaned = strings.ReplaceAll(cleaned, "&gt;", ">")
+	cleaned = strings.ReplaceAll(cleaned, "&quot;", "\"")
+	cleaned = strings.ReplaceAll(cleaned, "&#39;", "'")
+	cleaned = strings.ReplaceAll(cleaned, "&iuml;", "ï")
+	cleaned = strings.ReplaceAll(cleaned, "&euml;", "ë")
+	cleaned = strings.ReplaceAll(cleaned, "&eacute;", "é")
+
+	// Clean up extra whitespace by replacing multiple spaces, tabs, and newlines
+	// with a single space, then trim any leading/trailing whitespace
+	cleaned = regexp.MustCompile(`\s+`).ReplaceAllString(cleaned, " ")
+	cleaned = strings.TrimSpace(cleaned)
+
+	return cleaned
+}

internal/services/html_cleaner_test.go

@@ -0,0 +1,325 @@
+// Package services_test provides tests for the HTML cleaner service.
+package services
+
+import (
+	"strings"
+	"testing"
+)
+
+// TestNewHTMLCleaner tests the NewHTMLCleaner constructor.
+func TestNewHTMLCleaner(t *testing.T) {
+	cleaner := NewHTMLCleaner()
+
+	if cleaner == nil {
+		t.Fatal("NewHTMLCleaner() returned nil")
+	}
+}
+
+// TestHTMLCleaner_CleanHTML tests the CleanHTML method with various HTML inputs.
+func TestHTMLCleaner_CleanHTML(t *testing.T) {
+	cleaner := NewHTMLCleaner()
+
+	tests := []struct {
+		name     string
+		input    string
+		expected string
+	}{
+		{
+			name:     "plain text (no HTML)",
+			input:    "This is plain text",
+			expected: "This is plain text",
+		},
+		{
+			name:     "empty string",
+			input:    "",
+			expected: "",
+		},
+		{
+			name:     "simple HTML tag",
+			input:    "<p>Hello world</p>",
+			expected: "Hello world",
+		},
+		{
+			name:     "multiple HTML tags",
+			input:    "<h1>Title</h1><p>Paragraph text</p>",
+			expected: "TitleParagraph text",
+		},
+		{
+			name:     "nested HTML tags",
+			input:    "<div><h1>Title</h1><p>Paragraph with <strong>bold</strong> text</p></div>",
+			expected: "TitleParagraph with bold text",
+		},
+		{
+			name:     "HTML with attributes",
+			input:    "<p class=\"test\" id=\"para1\">Text with attributes</p>",
+			expected: "Text with attributes",
+		},
+		{
+			name:     "self-closing tags",
+			input:    "Line 1<br/>Line 2<hr/>End",
+			expected: "Line 1Line 2End",
+		},
+		{
+			name:     "HTML entities - basic",
+			input:    "AT&amp;T &lt;company&gt; &quot;quoted&quot; &nbsp; text",
+			expected: "AT&T <company> \"quoted\" text",
+		},
+		{
+			name:     "HTML entities - apostrophe",
+			input:    "It&#39;s a test",
+			expected: "It's a test",
+		},
+		{
+			name:     "HTML entities - special characters",
+			input:    "&iuml;ber &euml;lite &eacute;cart&eacute;",
+			expected: "ïber ëlite écarté",
+		},
+		{
+			name:     "HTML entities - nbsp",
+			input:    "Word1&nbsp;&nbsp;&nbsp;Word2",
+			expected: "Word1 Word2",
+		},
+		{
+			name:     "mixed HTML and entities",
+			input:    "<p>Hello &amp; welcome to <strong>our</strong> site!</p>",
+			expected: "Hello & welcome to our site!",
+		},
+		{
+			name:     "multiple whitespace",
+			input:    "Text   with\t\tmultiple\n\nspaces",
+			expected: "Text with multiple spaces",
+		},
+		{
+			name:     "whitespace with HTML",
+			input:    "<p>  Text  with  </p>  <div>  spaces  </div>  ",
+			expected: "Text with spaces",
+		},
+		{
+			name:     "complex content",
+			input:    "<div class=\"content\"><h1>Course Title</h1><p>This is a <em>great</em> course about &amp; HTML entities like &nbsp; and &quot;quotes&quot;.</p></div>",
+			expected: "Course TitleThis is a great course about & HTML entities like and \"quotes\".",
+		},
+		{
+			name:     "malformed HTML",
+			input:    "<p>Unclosed paragraph<div>Another <span>tag</p></div>",
+			expected: "Unclosed paragraphAnother tag",
+		},
+		{
+			name:     "HTML comments (should be removed)",
+			input:    "Text before<!-- This is a comment -->Text after",
+			expected: "Text beforeText after",
+		},
+		{
+			name:     "script and style tags content",
+			input:    "<script>alert('test');</script>Content<style>body{color:red;}</style>",
+			expected: "alert('test');Contentbody{color:red;}",
+		},
+		{
+			name:     "line breaks and formatting",
+			input:    "<p>Line 1</p>\n<p>Line 2</p>\n<p>Line 3</p>",
+			expected: "Line 1 Line 2 Line 3",
+		},
+		{
+			name:     "only whitespace",
+			input:    "   \t\n   ",
+			expected: "",
+		},
+		{
+			name:     "only HTML tags",
+			input:    "<div><p></p></div>",
+			expected: "",
+		},
+		{
+			name:     "HTML with newlines",
+			input:    "<p>\n  Paragraph with\n  line breaks\n</p>",
+			expected: "Paragraph with line breaks",
+		},
+		{
+			name:     "complex nested structure",
+			input:    "<article><header><h1>Title</h1></header><section><p>First paragraph with <a href=\"#\">link</a>.</p><ul><li>Item 1</li><li>Item 2</li></ul></section></article>",
+			expected: "TitleFirst paragraph with link.Item 1Item 2",
+		},
+		{
+			name:     "entities in attributes (should still be processed)",
+			input:    "<p title=\"AT&amp;T\">Content</p>",
+			expected: "Content",
+		},
+		{
+			name:     "special HTML5 entities",
+			input:    "Left arrow &larr; Right arrow &rarr;",
+			expected: "Left arrow &larr; Right arrow &rarr;", // These are not handled by the cleaner
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			result := cleaner.CleanHTML(tt.input)
+			if result != tt.expected {
+				t.Errorf("CleanHTML(%q) = %q, want %q", tt.input, result, tt.expected)
+			}
+		})
+	}
+}
+
+// TestHTMLCleaner_CleanHTML_LargeContent tests the CleanHTML method with large content.
+func TestHTMLCleaner_CleanHTML_LargeContent(t *testing.T) {
+	cleaner := NewHTMLCleaner()
+
+	// Create a large HTML string
+	var builder strings.Builder
+	builder.WriteString("<html><body>")
+	for i := 0; i < 1000; i++ {
+		builder.WriteString("<p>Paragraph ")
+		builder.WriteString(string(rune('0' + i%10)))
+		builder.WriteString(" with some content &amp; entities.</p>")
+	}
+	builder.WriteString("</body></html>")
+
+	input := builder.String()
+	result := cleaner.CleanHTML(input)
+
+	// Check that HTML tags are removed
+	if strings.Contains(result, "<") || strings.Contains(result, ">") {
+		t.Error("Result should not contain HTML tags")
+	}
+
+	// Check that content is preserved
+	if !strings.Contains(result, "Paragraph") {
+		t.Error("Result should contain paragraph content")
+	}
+
+	// Check that entities are converted
+	if strings.Contains(result, "&amp;") {
+		t.Error("Result should not contain unconverted HTML entities")
+	}
+	if !strings.Contains(result, "&") {
+		t.Error("Result should contain converted ampersand")
+	}
+}
+
+// TestHTMLCleaner_CleanHTML_EdgeCases tests edge cases for the CleanHTML method.
+func TestHTMLCleaner_CleanHTML_EdgeCases(t *testing.T) {
+	cleaner := NewHTMLCleaner()
+
+	tests := []struct {
+		name     string
+		input    string
+		expected string
+	}{
+		{
+			name:     "only entities",
+			input:    "&amp;&lt;&gt;&quot;&#39;&nbsp;",
+			expected: "&<>\"'",
+		},
+		{
+			name:     "repeated entities",
+			input:    "&amp;&amp;&amp;",
+			expected: "&&&",
+		},
+		{
+			name:     "entities without semicolon (should not be converted)",
+			input:    "&amp test &lt test",
+			expected: "&amp test &lt test",
+		},
+		{
+			name:     "mixed valid and invalid entities",
+			input:    "&amp; &invalid; &lt; &fake;",
+			expected: "& &invalid; < &fake;",
+		},
+		{
+			name:     "unclosed tag at end",
+			input:    "Content <p>with unclosed",
+			expected: "Content with unclosed",
+		},
+		{
+			name:     "tag with no closing bracket",
+			input:    "Content <p class='test' with no closing bracket",
+			expected: "Content <p class='test' with no closing bracket",
+		},
+		{
+			name:     "extremely nested tags",
+			input:    "<div><div><div><div><div>Deep content</div></div></div></div></div>",
+			expected: "Deep content",
+		},
+		{
+			name:     "empty tags with whitespace",
+			input:    "<p>   </p><div>\t\n</div>",
+			expected: "",
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			result := cleaner.CleanHTML(tt.input)
+			if result != tt.expected {
+				t.Errorf("CleanHTML(%q) = %q, want %q", tt.input, result, tt.expected)
+			}
+		})
+	}
+}
+
+// TestHTMLCleaner_CleanHTML_Unicode tests Unicode content handling.
+func TestHTMLCleaner_CleanHTML_Unicode(t *testing.T) {
+	cleaner := NewHTMLCleaner()
+
+	tests := []struct {
+		name     string
+		input    string
+		expected string
+	}{
+		{
+			name:     "unicode characters",
+			input:    "<p>Hello 世界! Café naïve résumé</p>",
+			expected: "Hello 世界! Café naïve résumé",
+		},
+		{
+			name:     "unicode with entities",
+			input:    "<p>Unicode: 你好 &amp; emoji: 🌍</p>",
+			expected: "Unicode: 你好 & emoji: 🌍",
+		},
+		{
+			name:     "mixed scripts",
+			input:    "<div>English العربية русский 日本語</div>",
+			expected: "English العربية русский 日本語",
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			result := cleaner.CleanHTML(tt.input)
+			if result != tt.expected {
+				t.Errorf("CleanHTML(%q) = %q, want %q", tt.input, result, tt.expected)
+			}
+		})
+	}
+}
+
+// BenchmarkHTMLCleaner_CleanHTML benchmarks the CleanHTML method.
+func BenchmarkHTMLCleaner_CleanHTML(b *testing.B) {
+	cleaner := NewHTMLCleaner()
+	input := "<div class=\"content\"><h1>Course Title</h1><p>This is a <em>great</em> course about &amp; HTML entities like &nbsp; and &quot;quotes&quot;.</p><ul><li>Item 1</li><li>Item 2</li></ul></div>"
+
+	b.ResetTimer()
+	for i := 0; i < b.N; i++ {
+		cleaner.CleanHTML(input)
+	}
+}
+
+// BenchmarkHTMLCleaner_CleanHTML_Large benchmarks the CleanHTML method with large content.
+func BenchmarkHTMLCleaner_CleanHTML_Large(b *testing.B) {
+	cleaner := NewHTMLCleaner()
+
+	// Create a large HTML string
+	var builder strings.Builder
+	for i := 0; i < 100; i++ {
+		builder.WriteString("<p>Paragraph ")
+		builder.WriteString(string(rune('0' + i%10)))
+		builder.WriteString(" with some content &amp; entities &lt;test&gt;.</p>")
+	}
+	input := builder.String()
+
+	b.ResetTimer()
+	for i := 0; i < b.N; i++ {
+		cleaner.CleanHTML(input)
+	}
+}

internal/services/parser.go

@@ -0,0 +1,145 @@
+// Package services provides the core functionality for the articulate-parser application.
+// It implements the interfaces defined in the interfaces package.
+package services
+
+import (
+	"encoding/json"
+	"fmt"
+	"io"
+	"net/http"
+	"net/url"
+	"os"
+	"regexp"
+	"time"
+
+	"github.com/kjanat/articulate-parser/internal/interfaces"
+	"github.com/kjanat/articulate-parser/internal/models"
+)
+
+// ArticulateParser implements the CourseParser interface specifically for Articulate Rise courses.
+// It can fetch courses from the Articulate Rise API or load them from local JSON files.
+type ArticulateParser struct {
+	// BaseURL is the root URL for the Articulate Rise API
+	BaseURL string
+	// Client is the HTTP client used to make requests to the API
+	Client *http.Client
+}
+
+// NewArticulateParser creates a new ArticulateParser instance with default settings.
+// The default configuration uses the standard Articulate Rise API URL and a
+// HTTP client with a 30-second timeout.
+func NewArticulateParser() interfaces.CourseParser {
+	return &ArticulateParser{
+		BaseURL: "https://rise.articulate.com",
+		Client: &http.Client{
+			Timeout: 30 * time.Second,
+		},
+	}
+}
+
+// FetchCourse fetches a course from the given URI.
+// It extracts the share ID from the URI, constructs an API URL, and fetches the course data.
+// The course data is then unmarshalled into a Course model.
+//
+// Parameters:
+//   - uri: The Articulate Rise share URL (e.g., https://rise.articulate.com/share/SHARE_ID)
+//
+// Returns:
+//   - A parsed Course model if successful
+//   - An error if the fetch fails, if the share ID can't be extracted,
+//     or if the response can't be parsed
+func (p *ArticulateParser) FetchCourse(uri string) (*models.Course, error) {
+	shareID, err := p.extractShareID(uri)
+	if err != nil {
+		return nil, err
+	}
+
+	apiURL := p.buildAPIURL(shareID)
+
+	resp, err := p.Client.Get(apiURL)
+	if err != nil {
+		return nil, fmt.Errorf("failed to fetch course data: %w", err)
+	}
+	defer resp.Body.Close()
+
+	if resp.StatusCode != http.StatusOK {
+		return nil, fmt.Errorf("API returned status %d", resp.StatusCode)
+	}
+
+	body, err := io.ReadAll(resp.Body)
+	if err != nil {
+		return nil, fmt.Errorf("failed to read response body: %w", err)
+	}
+
+	var course models.Course
+	if err := json.Unmarshal(body, &course); err != nil {
+		return nil, fmt.Errorf("failed to unmarshal JSON: %w", err)
+	}
+
+	return &course, nil
+}
+
+// LoadCourseFromFile loads an Articulate Rise course from a local JSON file.
+// The file should contain a valid JSON representation of an Articulate Rise course.
+//
+// Parameters:
+//   - filePath: The path to the JSON file containing the course data
+//
+// Returns:
+//   - A parsed Course model if successful
+//   - An error if the file can't be read or the JSON can't be parsed
+func (p *ArticulateParser) LoadCourseFromFile(filePath string) (*models.Course, error) {
+	data, err := os.ReadFile(filePath)
+	if err != nil {
+		return nil, fmt.Errorf("failed to read file: %w", err)
+	}
+
+	var course models.Course
+	if err := json.Unmarshal(data, &course); err != nil {
+		return nil, fmt.Errorf("failed to unmarshal JSON: %w", err)
+	}
+
+	return &course, nil
+}
+
+// extractShareID extracts the share ID from a Rise URI.
+// It uses a regular expression to find the share ID in URIs like:
+// https://rise.articulate.com/share/N_APNg40Vr2CSH2xNz-ZLATM5kNviDIO#/
+//
+// Parameters:
+//   - uri: The Articulate Rise share URL
+//
+// Returns:
+//   - The share ID string if found
+//   - An error if the share ID can't be extracted from the URI
+func (p *ArticulateParser) extractShareID(uri string) (string, error) {
+	// Parse the URL to validate the domain
+	parsedURL, err := url.Parse(uri)
+	if err != nil {
+		return "", fmt.Errorf("invalid URI: %s", uri)
+	}
+
+	// Validate that it's an Articulate Rise domain
+	if parsedURL.Host != "rise.articulate.com" {
+		return "", fmt.Errorf("invalid domain for Articulate Rise URI: %s", parsedURL.Host)
+	}
+
+	re := regexp.MustCompile(`/share/([a-zA-Z0-9_-]+)`)
+	matches := re.FindStringSubmatch(uri)
+	if len(matches) < 2 {
+		return "", fmt.Errorf("could not extract share ID from URI: %s", uri)
+	}
+	return matches[1], nil
+}
+
+// buildAPIURL constructs the API URL for fetching course data.
+// It combines the base URL with the API path and the share ID.
+//
+// Parameters:
+//   - shareID: The extracted share ID from the course URI
+//
+// Returns:
+//   - The complete API URL string for fetching the course data
+func (p *ArticulateParser) buildAPIURL(shareID string) string {
+	return fmt.Sprintf("%s/api/rise-runtime/boot/share/%s", p.BaseURL, shareID)
+}

internal/services/parser_test.go

@@ -0,0 +1,440 @@
+// Package services_test provides tests for the parser service.
+package services
+
+import (
+	"encoding/json"
+	"net/http"
+	"net/http/httptest"
+	"os"
+	"path/filepath"
+	"strings"
+	"testing"
+	"time"
+
+	"github.com/kjanat/articulate-parser/internal/models"
+)
+
+// TestNewArticulateParser tests the NewArticulateParser constructor.
+func TestNewArticulateParser(t *testing.T) {
+	parser := NewArticulateParser()
+
+	if parser == nil {
+		t.Fatal("NewArticulateParser() returned nil")
+	}
+
+	// Type assertion to check internal structure
+	articulateParser, ok := parser.(*ArticulateParser)
+	if !ok {
+		t.Fatal("NewArticulateParser() returned wrong type")
+	}
+
+	expectedBaseURL := "https://rise.articulate.com"
+	if articulateParser.BaseURL != expectedBaseURL {
+		t.Errorf("Expected BaseURL '%s', got '%s'", expectedBaseURL, articulateParser.BaseURL)
+	}
+
+	if articulateParser.Client == nil {
+		t.Error("Client should not be nil")
+	}
+
+	expectedTimeout := 30 * time.Second
+	if articulateParser.Client.Timeout != expectedTimeout {
+		t.Errorf("Expected timeout %v, got %v", expectedTimeout, articulateParser.Client.Timeout)
+	}
+}
+
+// TestArticulateParser_FetchCourse tests the FetchCourse method.
+func TestArticulateParser_FetchCourse(t *testing.T) {
+	// Create a test course object
+	testCourse := &models.Course{
+		ShareID: "test-share-id",
+		Author:  "Test Author",
+		Course: models.CourseInfo{
+			ID:          "test-course-id",
+			Title:       "Test Course",
+			Description: "Test Description",
+		},
+	}
+
+	// Create test server
+	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		// Check request path
+		expectedPath := "/api/rise-runtime/boot/share/test-share-id"
+		if r.URL.Path != expectedPath {
+			t.Errorf("Expected path '%s', got '%s'", expectedPath, r.URL.Path)
+		}
+
+		// Check request method
+		if r.Method != http.MethodGet {
+			t.Errorf("Expected method GET, got %s", r.Method)
+		}
+
+		// Return mock response
+		w.Header().Set("Content-Type", "application/json")
+		if err := json.NewEncoder(w).Encode(testCourse); err != nil {
+			t.Fatalf("Failed to encode test course: %v", err)
+		}
+	}))
+	defer server.Close()
+
+	// Create parser with test server URL
+	parser := &ArticulateParser{
+		BaseURL: server.URL,
+		Client: &http.Client{
+			Timeout: 5 * time.Second,
+		},
+	}
+
+	tests := []struct {
+		name          string
+		uri           string
+		expectedError string
+	}{
+		{
+			name: "valid articulate rise URI",
+			uri:  "https://rise.articulate.com/share/test-share-id#/",
+		},
+		{
+			name: "valid articulate rise URI without fragment",
+			uri:  "https://rise.articulate.com/share/test-share-id",
+		},
+		{
+			name:          "invalid URI format",
+			uri:           "invalid-uri",
+			expectedError: "invalid domain for Articulate Rise URI:",
+		},
+		{
+			name:          "empty URI",
+			uri:           "",
+			expectedError: "invalid domain for Articulate Rise URI:",
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			course, err := parser.FetchCourse(tt.uri)
+
+			if tt.expectedError != "" {
+				if err == nil {
+					t.Fatalf("Expected error containing '%s', got nil", tt.expectedError)
+				}
+				if !strings.Contains(err.Error(), tt.expectedError) {
+					t.Errorf("Expected error containing '%s', got '%s'", tt.expectedError, err.Error())
+				}
+			} else {
+				if err != nil {
+					t.Fatalf("Expected no error, got: %v", err)
+				}
+				if course == nil {
+					t.Fatal("Expected course, got nil")
+				}
+				if course.ShareID != testCourse.ShareID {
+					t.Errorf("Expected ShareID '%s', got '%s'", testCourse.ShareID, course.ShareID)
+				}
+			}
+		})
+	}
+}
+
+// TestArticulateParser_FetchCourse_NetworkError tests network error handling.
+func TestArticulateParser_FetchCourse_NetworkError(t *testing.T) {
+	// Create parser with invalid URL to simulate network error
+	parser := &ArticulateParser{
+		BaseURL: "http://localhost:99999", // Invalid port
+		Client: &http.Client{
+			Timeout: 1 * time.Millisecond, // Very short timeout
+		},
+	}
+
+	_, err := parser.FetchCourse("https://rise.articulate.com/share/test-share-id")
+	if err == nil {
+		t.Fatal("Expected network error, got nil")
+	}
+
+	if !strings.Contains(err.Error(), "failed to fetch course data") {
+		t.Errorf("Expected error to contain 'failed to fetch course data', got '%s'", err.Error())
+	}
+}
+
+// TestArticulateParser_FetchCourse_InvalidJSON tests invalid JSON response handling.
+func TestArticulateParser_FetchCourse_InvalidJSON(t *testing.T) {
+	// Create test server that returns invalid JSON
+	server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
+		w.Header().Set("Content-Type", "application/json")
+		w.Write([]byte("invalid json"))
+	}))
+	defer server.Close()
+
+	parser := &ArticulateParser{
+		BaseURL: server.URL,
+		Client: &http.Client{
+			Timeout: 5 * time.Second,
+		},
+	}
+
+	_, err := parser.FetchCourse("https://rise.articulate.com/share/test-share-id")
+	if err == nil {
+		t.Fatal("Expected JSON parsing error, got nil")
+	}
+
+	if !strings.Contains(err.Error(), "failed to unmarshal JSON") {
+		t.Errorf("Expected error to contain 'failed to unmarshal JSON', got '%s'", err.Error())
+	}
+}
+
+// TestArticulateParser_LoadCourseFromFile tests the LoadCourseFromFile method.
+func TestArticulateParser_LoadCourseFromFile(t *testing.T) {
+	// Create a temporary test file
+	testCourse := &models.Course{
+		ShareID: "file-test-share-id",
+		Author:  "File Test Author",
+		Course: models.CourseInfo{
+			ID:          "file-test-course-id",
+			Title:       "File Test Course",
+			Description: "File Test Description",
+		},
+	}
+
+	// Create temporary directory and file
+	tempDir := t.TempDir()
+	tempFile := filepath.Join(tempDir, "test-course.json")
+
+	// Write test data to file
+	data, err := json.Marshal(testCourse)
+	if err != nil {
+		t.Fatalf("Failed to marshal test course: %v", err)
+	}
+
+	if err := os.WriteFile(tempFile, data, 0644); err != nil {
+		t.Fatalf("Failed to write test file: %v", err)
+	}
+
+	parser := NewArticulateParser()
+
+	tests := []struct {
+		name          string
+		filePath      string
+		expectedError string
+	}{
+		{
+			name:     "valid file",
+			filePath: tempFile,
+		},
+		{
+			name:          "nonexistent file",
+			filePath:      filepath.Join(tempDir, "nonexistent.json"),
+			expectedError: "failed to read file",
+		},
+		{
+			name:          "empty path",
+			filePath:      "",
+			expectedError: "failed to read file",
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			course, err := parser.LoadCourseFromFile(tt.filePath)
+
+			if tt.expectedError != "" {
+				if err == nil {
+					t.Fatalf("Expected error containing '%s', got nil", tt.expectedError)
+				}
+				if !strings.Contains(err.Error(), tt.expectedError) {
+					t.Errorf("Expected error containing '%s', got '%s'", tt.expectedError, err.Error())
+				}
+			} else {
+				if err != nil {
+					t.Fatalf("Expected no error, got: %v", err)
+				}
+				if course == nil {
+					t.Fatal("Expected course, got nil")
+				}
+				if course.ShareID != testCourse.ShareID {
+					t.Errorf("Expected ShareID '%s', got '%s'", testCourse.ShareID, course.ShareID)
+				}
+			}
+		})
+	}
+}
+
+// TestArticulateParser_LoadCourseFromFile_InvalidJSON tests invalid JSON file handling.
+func TestArticulateParser_LoadCourseFromFile_InvalidJSON(t *testing.T) {
+	// Create temporary file with invalid JSON
+	tempDir := t.TempDir()
+	tempFile := filepath.Join(tempDir, "invalid.json")
+
+	if err := os.WriteFile(tempFile, []byte("invalid json content"), 0644); err != nil {
+		t.Fatalf("Failed to write test file: %v", err)
+	}
+
+	parser := NewArticulateParser()
+	_, err := parser.LoadCourseFromFile(tempFile)
+
+	if err == nil {
+		t.Fatal("Expected JSON parsing error, got nil")
+	}
+
+	if !strings.Contains(err.Error(), "failed to unmarshal JSON") {
+		t.Errorf("Expected error to contain 'failed to unmarshal JSON', got '%s'", err.Error())
+	}
+}
+
+// TestExtractShareID tests the extractShareID method.
+func TestExtractShareID(t *testing.T) {
+	parser := &ArticulateParser{}
+
+	tests := []struct {
+		name     string
+		uri      string
+		expected string
+		hasError bool
+	}{
+		{
+			name:     "standard articulate rise URI with fragment",
+			uri:      "https://rise.articulate.com/share/N_APNg40Vr2CSH2xNz-ZLATM5kNviDIO#/",
+			expected: "N_APNg40Vr2CSH2xNz-ZLATM5kNviDIO",
+		},
+		{
+			name:     "standard articulate rise URI without fragment",
+			uri:      "https://rise.articulate.com/share/N_APNg40Vr2CSH2xNz-ZLATM5kNviDIO",
+			expected: "N_APNg40Vr2CSH2xNz-ZLATM5kNviDIO",
+		},
+		{
+			name:     "URI with trailing slash",
+			uri:      "https://rise.articulate.com/share/N_APNg40Vr2CSH2xNz-ZLATM5kNviDIO/",
+			expected: "N_APNg40Vr2CSH2xNz-ZLATM5kNviDIO",
+		},
+		{
+			name:     "short share ID",
+			uri:      "https://rise.articulate.com/share/abc123",
+			expected: "abc123",
+		},
+		{
+			name:     "share ID with hyphens and underscores",
+			uri:      "https://rise.articulate.com/share/test_ID-123_abc",
+			expected: "test_ID-123_abc",
+		},
+		{
+			name:     "invalid URI - no share path",
+			uri:      "https://rise.articulate.com/",
+			hasError: true,
+		},
+		{
+			name:     "invalid URI - wrong domain",
+			uri:      "https://example.com/share/test123",
+			hasError: true,
+		},
+		{
+			name:     "invalid URI - no share ID",
+			uri:      "https://rise.articulate.com/share/",
+			hasError: true,
+		},
+		{
+			name:     "empty URI",
+			uri:      "",
+			hasError: true,
+		},
+		{
+			name:     "malformed URI",
+			uri:      "not-a-uri",
+			hasError: true,
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			result, err := parser.extractShareID(tt.uri)
+
+			if tt.hasError {
+				if err == nil {
+					t.Fatalf("Expected error for URI '%s', got nil", tt.uri)
+				}
+			} else {
+				if err != nil {
+					t.Fatalf("Expected no error for URI '%s', got: %v", tt.uri, err)
+				}
+				if result != tt.expected {
+					t.Errorf("Expected share ID '%s', got '%s'", tt.expected, result)
+				}
+			}
+		})
+	}
+}
+
+// TestBuildAPIURL tests the buildAPIURL method.
+func TestBuildAPIURL(t *testing.T) {
+	parser := &ArticulateParser{
+		BaseURL: "https://rise.articulate.com",
+	}
+
+	tests := []struct {
+		name     string
+		shareID  string
+		expected string
+	}{
+		{
+			name:     "standard share ID",
+			shareID:  "N_APNg40Vr2CSH2xNz-ZLATM5kNviDIO",
+			expected: "https://rise.articulate.com/api/rise-runtime/boot/share/N_APNg40Vr2CSH2xNz-ZLATM5kNviDIO",
+		},
+		{
+			name:     "short share ID",
+			shareID:  "abc123",
+			expected: "https://rise.articulate.com/api/rise-runtime/boot/share/abc123",
+		},
+		{
+			name:     "share ID with special characters",
+			shareID:  "test_ID-123_abc",
+			expected: "https://rise.articulate.com/api/rise-runtime/boot/share/test_ID-123_abc",
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			result := parser.buildAPIURL(tt.shareID)
+			if result != tt.expected {
+				t.Errorf("Expected URL '%s', got '%s'", tt.expected, result)
+			}
+		})
+	}
+}
+
+// TestBuildAPIURL_DifferentBaseURL tests buildAPIURL with different base URLs.
+func TestBuildAPIURL_DifferentBaseURL(t *testing.T) {
+	parser := &ArticulateParser{
+		BaseURL: "https://custom.domain.com",
+	}
+
+	shareID := "test123"
+	expected := "https://custom.domain.com/api/rise-runtime/boot/share/test123"
+	result := parser.buildAPIURL(shareID)
+
+	if result != expected {
+		t.Errorf("Expected URL '%s', got '%s'", expected, result)
+	}
+}
+
+// BenchmarkExtractShareID benchmarks the extractShareID method.
+func BenchmarkExtractShareID(b *testing.B) {
+	parser := &ArticulateParser{}
+	uri := "https://rise.articulate.com/share/N_APNg40Vr2CSH2xNz-ZLATM5kNviDIO#/"
+
+	b.ResetTimer()
+	for i := 0; i < b.N; i++ {
+		_, _ = parser.extractShareID(uri)
+	}
+}
+
+// BenchmarkBuildAPIURL benchmarks the buildAPIURL method.
+func BenchmarkBuildAPIURL(b *testing.B) {
+	parser := &ArticulateParser{
+		BaseURL: "https://rise.articulate.com",
+	}
+	shareID := "N_APNg40Vr2CSH2xNz-ZLATM5kNviDIO"
+
+	b.ResetTimer()
+	for i := 0; i < b.N; i++ {
+		_ = parser.buildAPIURL(shareID)
+	}
+}

internal/version/version.go

@@ -5,7 +5,7 @@ package version
 // Version information.
 var (
 	// Version is the current version of the application.
-	Version = "0.1.0"
+	Version = "0.3.0"
 
 	// BuildTime is the time the binary was built.
 	BuildTime = "unknown"

main.go

@@ -1,622 +1,89 @@
+// Package main provides the entry point for the articulate-parser application.
+// This application fetches Articulate Rise courses from URLs or local files and
+// exports them to different formats such as Markdown or DOCX.
 package main
 
 import (
-	"bytes"
-	"encoding/json"
 	"fmt"
-	"io"
 	"log"
-	"net/http"
 	"os"
-	"path/filepath"
-	"regexp"
-	"strings"
-	"time"
 
-	"github.com/unidoc/unioffice/document"
-
-	"github.com/kjanat/articulate-parser/internal/version"
+	"github.com/kjanat/articulate-parser/internal/exporters"
+	"github.com/kjanat/articulate-parser/internal/services"
 )
 
-// Core data structures based on the Articulate Rise JSON format
-type Course struct {
-	ShareID  string     `json:"shareId"`
-	Author   string     `json:"author"`
-	Course   CourseInfo `json:"course"`
-	LabelSet LabelSet   `json:"labelSet"`
-}
-
-type CourseInfo struct {
-	ID             string          `json:"id"`
-	Title          string          `json:"title"`
-	Description    string          `json:"description"`
-	Color          string          `json:"color"`
-	NavigationMode string          `json:"navigationMode"`
-	Lessons        []Lesson        `json:"lessons"`
-	CoverImage     *Media          `json:"coverImage,omitempty"`
-	ExportSettings *ExportSettings `json:"exportSettings,omitempty"`
-}
-
-type Lesson struct {
-	ID          string      `json:"id"`
-	Title       string      `json:"title"`
-	Description string      `json:"description"`
-	Type        string      `json:"type"`
-	Icon        string      `json:"icon"`
-	Items       []Item      `json:"items"`
-	Position    interface{} `json:"position"`
-	Ready       bool        `json:"ready"`
-	CreatedAt   string      `json:"createdAt"`
-	UpdatedAt   string      `json:"updatedAt"`
-}
-
-type Item struct {
-	ID       string      `json:"id"`
-	Type     string      `json:"type"`
-	Family   string      `json:"family"`
-	Variant  string      `json:"variant"`
-	Items    []SubItem   `json:"items"`
-	Settings interface{} `json:"settings"`
-	Data     interface{} `json:"data"`
-	Media    *Media      `json:"media,omitempty"`
-}
-
-type SubItem struct {
-	ID        string    `json:"id"`
-	Type      string    `json:"type,omitempty"`
-	Title     string    `json:"title,omitempty"`
-	Heading   string    `json:"heading,omitempty"`
-	Paragraph string    `json:"paragraph,omitempty"`
-	Caption   string    `json:"caption,omitempty"`
-	Media     *Media    `json:"media,omitempty"`
-	Answers   []Answer  `json:"answers,omitempty"`
-	Feedback  string    `json:"feedback,omitempty"`
-	Front     *CardSide `json:"front,omitempty"`
-	Back      *CardSide `json:"back,omitempty"`
-}
-
-type Answer struct {
-	ID         string `json:"id"`
-	Title      string `json:"title"`
-	Correct    bool   `json:"correct"`
-	MatchTitle string `json:"matchTitle,omitempty"`
-}
-
-type CardSide struct {
-	Media       *Media `json:"media,omitempty"`
-	Description string `json:"description,omitempty"`
-}
-
-type Media struct {
-	Image *ImageMedia `json:"image,omitempty"`
-	Video *VideoMedia `json:"video,omitempty"`
-}
-
-type ImageMedia struct {
-	Key           string `json:"key"`
-	Type          string `json:"type"`
-	Width         int    `json:"width,omitempty"`
-	Height        int    `json:"height,omitempty"`
-	CrushedKey    string `json:"crushedKey,omitempty"`
-	OriginalUrl   string `json:"originalUrl"`
-	UseCrushedKey bool   `json:"useCrushedKey,omitempty"`
-}
-
-type VideoMedia struct {
-	Key         string `json:"key"`
-	URL         string `json:"url"`
-	Type        string `json:"type"`
-	Poster      string `json:"poster,omitempty"`
-	Duration    int    `json:"duration,omitempty"`
-	InputKey    string `json:"inputKey,omitempty"`
-	Thumbnail   string `json:"thumbnail,omitempty"`
-	OriginalUrl string `json:"originalUrl"`
-}
-
-type ExportSettings struct {
-	Title  string `json:"title"`
-	Format string `json:"format"`
-}
-
-type LabelSet struct {
-	ID     string            `json:"id"`
-	Name   string            `json:"name"`
-	Labels map[string]string `json:"labels"`
-}
-
-// Parser main struct
-type ArticulateParser struct {
-	BaseURL string
-	Client  *http.Client
-}
-
-func NewArticulateParser() *ArticulateParser {
-	return &ArticulateParser{
-		BaseURL: "https://rise.articulate.com",
-		Client: &http.Client{
-			Timeout: 30 * time.Second,
-		},
-	}
-}
-
-func (p *ArticulateParser) ExtractShareID(uri string) (string, error) {
-	// Extract share ID from URI like: https://rise.articulate.com/share/N_APNg40Vr2CSH2xNz-ZLATM5kNviDIO#/
-	re := regexp.MustCompile(`/share/([a-zA-Z0-9_-]+)`)
-	matches := re.FindStringSubmatch(uri)
-	if len(matches) < 2 {
-		return "", fmt.Errorf("could not extract share ID from URI: %s", uri)
-	}
-	return matches[1], nil
-}
-
-func (p *ArticulateParser) BuildAPIURL(shareID string) string {
-	return fmt.Sprintf("%s/api/rise-runtime/boot/share/%s", p.BaseURL, shareID)
-}
-
-func (p *ArticulateParser) FetchCourse(uri string) (*Course, error) {
-	shareID, err := p.ExtractShareID(uri)
-	if err != nil {
-		return nil, err
-	}
-
-	apiURL := p.BuildAPIURL(shareID)
-
-	resp, err := p.Client.Get(apiURL)
-	if err != nil {
-		return nil, fmt.Errorf("failed to fetch course data: %w", err)
-	}
-	defer resp.Body.Close()
-
-	if resp.StatusCode != http.StatusOK {
-		return nil, fmt.Errorf("API returned status %d", resp.StatusCode)
-	}
-
-	body, err := io.ReadAll(resp.Body)
-	if err != nil {
-		return nil, fmt.Errorf("failed to read response body: %w", err)
-	}
-
-	var course Course
-	if err := json.Unmarshal(body, &course); err != nil {
-		return nil, fmt.Errorf("failed to unmarshal JSON: %w", err)
-	}
-
-	return &course, nil
-}
-
-func (p *ArticulateParser) LoadCourseFromFile(filePath string) (*Course, error) {
-	data, err := os.ReadFile(filePath)
-	if err != nil {
-		return nil, fmt.Errorf("failed to read file: %w", err)
-	}
-
-	var course Course
-	if err := json.Unmarshal(data, &course); err != nil {
-		return nil, fmt.Errorf("failed to unmarshal JSON: %w", err)
-	}
-
-	return &course, nil
-}
-
-// HTML cleaner utility
-func cleanHTML(html string) string {
-	// Remove HTML tags but preserve content
-	re := regexp.MustCompile(`<[^>]*>`)
-	cleaned := re.ReplaceAllString(html, "")
-
-	// Replace HTML entities
-	cleaned = strings.ReplaceAll(cleaned, "&nbsp;", " ")
-	cleaned = strings.ReplaceAll(cleaned, "&amp;", "&")
-	cleaned = strings.ReplaceAll(cleaned, "&lt;", "<")
-	cleaned = strings.ReplaceAll(cleaned, "&gt;", ">")
-	cleaned = strings.ReplaceAll(cleaned, "&quot;", "\"")
-	cleaned = strings.ReplaceAll(cleaned, "&#39;", "'")
-	cleaned = strings.ReplaceAll(cleaned, "&iuml;", "ï")
-	cleaned = strings.ReplaceAll(cleaned, "&euml;", "ë")
-	cleaned = strings.ReplaceAll(cleaned, "&eacute;", "é")
-
-	// Clean up extra whitespace
-	cleaned = regexp.MustCompile(`\s+`).ReplaceAllString(cleaned, " ")
-	cleaned = strings.TrimSpace(cleaned)
-
-	return cleaned
-}
-
-// Markdown export functions
-func (p *ArticulateParser) ExportToMarkdown(course *Course, outputPath string) error {
-	var buf bytes.Buffer
-
-	// Write course header
-	buf.WriteString(fmt.Sprintf("# %s\n\n", course.Course.Title))
-
-	if course.Course.Description != "" {
-		buf.WriteString(fmt.Sprintf("%s\n\n", cleanHTML(course.Course.Description)))
-	}
-
-	// Add metadata
-	buf.WriteString("## Course Information\n\n")
-	buf.WriteString(fmt.Sprintf("- **Course ID**: %s\n", course.Course.ID))
-	buf.WriteString(fmt.Sprintf("- **Share ID**: %s\n", course.ShareID))
-	buf.WriteString(fmt.Sprintf("- **Navigation Mode**: %s\n", course.Course.NavigationMode))
-	if course.Course.ExportSettings != nil {
-		buf.WriteString(fmt.Sprintf("- **Export Format**: %s\n", course.Course.ExportSettings.Format))
-	}
-	buf.WriteString("\n---\n\n")
-
-	// Process lessons
-	for i, lesson := range course.Course.Lessons {
-		if lesson.Type == "section" {
-			buf.WriteString(fmt.Sprintf("# %s\n\n", lesson.Title))
-			continue
-		}
-
-		buf.WriteString(fmt.Sprintf("## Lesson %d: %s\n\n", i+1, lesson.Title))
-
-		if lesson.Description != "" {
-			buf.WriteString(fmt.Sprintf("%s\n\n", cleanHTML(lesson.Description)))
-		}
-
-		// Process lesson items
-		for _, item := range lesson.Items {
-			p.processItemToMarkdown(&buf, item, 3)
-		}
-
-		buf.WriteString("\n---\n\n")
-	}
-
-	return os.WriteFile(outputPath, buf.Bytes(), 0644)
-}
-
-func (p *ArticulateParser) processItemToMarkdown(buf *bytes.Buffer, item Item, level int) {
-	headingPrefix := strings.Repeat("#", level)
-
-	switch item.Type {
-	case "text":
-		for _, subItem := range item.Items {
-			if subItem.Heading != "" {
-				heading := cleanHTML(subItem.Heading)
-				if heading != "" {
-					buf.WriteString(fmt.Sprintf("%s %s\n\n", headingPrefix, heading))
-				}
-			}
-			if subItem.Paragraph != "" {
-				paragraph := cleanHTML(subItem.Paragraph)
-				if paragraph != "" {
-					buf.WriteString(fmt.Sprintf("%s\n\n", paragraph))
-				}
-			}
-		}
-
-	case "list":
-		for _, subItem := range item.Items {
-			if subItem.Paragraph != "" {
-				paragraph := cleanHTML(subItem.Paragraph)
-				if paragraph != "" {
-					buf.WriteString(fmt.Sprintf("- %s\n", paragraph))
-				}
-			}
-		}
-		buf.WriteString("\n")
-
-	case "multimedia":
-		buf.WriteString(fmt.Sprintf("%s Media Content\n\n", headingPrefix))
-		for _, subItem := range item.Items {
-			if subItem.Media != nil {
-				if subItem.Media.Video != nil {
-					buf.WriteString(fmt.Sprintf("**Video**: %s\n", subItem.Media.Video.OriginalUrl))
-					if subItem.Media.Video.Duration > 0 {
-						buf.WriteString(fmt.Sprintf("- Duration: %d seconds\n", subItem.Media.Video.Duration))
-					}
-				}
-				if subItem.Media.Image != nil {
-					buf.WriteString(fmt.Sprintf("**Image**: %s\n", subItem.Media.Image.OriginalUrl))
-				}
-			}
-			if subItem.Caption != "" {
-				caption := cleanHTML(subItem.Caption)
-				buf.WriteString(fmt.Sprintf("*%s*\n", caption))
-			}
-		}
-		buf.WriteString("\n")
-
-	case "image":
-		buf.WriteString(fmt.Sprintf("%s Image\n\n", headingPrefix))
-		for _, subItem := range item.Items {
-			if subItem.Media != nil && subItem.Media.Image != nil {
-				buf.WriteString(fmt.Sprintf("**Image**: %s\n", subItem.Media.Image.OriginalUrl))
-			}
-			if subItem.Caption != "" {
-				caption := cleanHTML(subItem.Caption)
-				buf.WriteString(fmt.Sprintf("*%s*\n", caption))
-			}
-		}
-		buf.WriteString("\n")
-
-	case "knowledgeCheck":
-		buf.WriteString(fmt.Sprintf("%s Knowledge Check\n\n", headingPrefix))
-		for _, subItem := range item.Items {
-			if subItem.Title != "" {
-				title := cleanHTML(subItem.Title)
-				buf.WriteString(fmt.Sprintf("**Question**: %s\n\n", title))
-			}
-
-			buf.WriteString("**Answers**:\n")
-			for i, answer := range subItem.Answers {
-				answerText := cleanHTML(answer.Title)
-				correctMark := ""
-				if answer.Correct {
-					correctMark = " ✓"
-				}
-				buf.WriteString(fmt.Sprintf("%d. %s%s\n", i+1, answerText, correctMark))
-			}
-
-			if subItem.Feedback != "" {
-				feedback := cleanHTML(subItem.Feedback)
-				buf.WriteString(fmt.Sprintf("\n**Feedback**: %s\n", feedback))
-			}
-		}
-		buf.WriteString("\n")
-
-	case "interactive":
-		buf.WriteString(fmt.Sprintf("%s Interactive Content\n\n", headingPrefix))
-		for _, subItem := range item.Items {
-			if subItem.Front != nil && subItem.Front.Description != "" {
-				desc := cleanHTML(subItem.Front.Description)
-				buf.WriteString(fmt.Sprintf("**Front**: %s\n", desc))
-			}
-			if subItem.Back != nil && subItem.Back.Description != "" {
-				desc := cleanHTML(subItem.Back.Description)
-				buf.WriteString(fmt.Sprintf("**Back**: %s\n", desc))
-			}
-		}
-		buf.WriteString("\n")
-
-	case "divider":
-		buf.WriteString("---\n\n")
-
-	default:
-		// Handle unknown types
-		if len(item.Items) > 0 {
-			buf.WriteString(fmt.Sprintf("%s %s Content\n\n", headingPrefix, strings.Title(item.Type)))
-			for _, subItem := range item.Items {
-				if subItem.Title != "" {
-					title := cleanHTML(subItem.Title)
-					buf.WriteString(fmt.Sprintf("- %s\n", title))
-				}
-			}
-			buf.WriteString("\n")
-		}
-	}
-}
-
-// DOCX export functions
-func (p *ArticulateParser) ExportToDocx(course *Course, outputPath string) error {
-	doc := document.New()
-
-	// Add title
-	title := doc.AddParagraph()
-	titleRun := title.AddRun()
-	titleRun.AddText(course.Course.Title)
-	titleRun.Properties().SetSize(20)
-	titleRun.Properties().SetBold(true)
-
-	// Add description
-	if course.Course.Description != "" {
-		desc := doc.AddParagraph()
-		descRun := desc.AddRun()
-		descRun.AddText(cleanHTML(course.Course.Description))
-	}
-
-	// Add course metadata
-	metadata := doc.AddParagraph()
-	metadataRun := metadata.AddRun()
-	metadataRun.Properties().SetBold(true)
-	metadataRun.AddText("Course Information")
-
-	courseInfo := doc.AddParagraph()
-	courseInfoRun := courseInfo.AddRun()
-	courseInfoText := fmt.Sprintf("Course ID: %s\nShare ID: %s\nNavigation Mode: %s",
-		course.Course.ID, course.ShareID, course.Course.NavigationMode)
-	courseInfoRun.AddText(courseInfoText)
-
-	// Process lessons
-	for i, lesson := range course.Course.Lessons {
-		if lesson.Type == "section" {
-			section := doc.AddParagraph()
-			sectionRun := section.AddRun()
-			sectionRun.AddText(lesson.Title)
-			sectionRun.Properties().SetSize(18)
-			sectionRun.Properties().SetBold(true)
-			continue
-		}
-
-		// Lesson title
-		lessonTitle := doc.AddParagraph()
-		lessonTitleRun := lessonTitle.AddRun()
-		lessonTitleRun.AddText(fmt.Sprintf("Lesson %d: %s", i+1, lesson.Title))
-		lessonTitleRun.Properties().SetSize(16)
-		lessonTitleRun.Properties().SetBold(true)
-
-		// Lesson description
-		if lesson.Description != "" {
-			lessonDesc := doc.AddParagraph()
-			lessonDescRun := lessonDesc.AddRun()
-			lessonDescRun.AddText(cleanHTML(lesson.Description))
-		}
-
-		// Process lesson items
-		for _, item := range lesson.Items {
-			p.processItemToDocx(doc, item)
-		}
-	}
-
-	return doc.SaveToFile(outputPath)
-}
-
-func (p *ArticulateParser) processItemToDocx(doc *document.Document, item Item) {
-	switch item.Type {
-	case "text":
-		for _, subItem := range item.Items {
-			if subItem.Heading != "" {
-				heading := cleanHTML(subItem.Heading)
-				if heading != "" {
-					para := doc.AddParagraph()
-					run := para.AddRun()
-					run.AddText(heading)
-					run.Properties().SetBold(true)
-				}
-			}
-			if subItem.Paragraph != "" {
-				paragraph := cleanHTML(subItem.Paragraph)
-				if paragraph != "" {
-					para := doc.AddParagraph()
-					run := para.AddRun()
-					run.AddText(paragraph)
-				}
-			}
-		}
-
-	case "list":
-		for _, subItem := range item.Items {
-			if subItem.Paragraph != "" {
-				paragraph := cleanHTML(subItem.Paragraph)
-				if paragraph != "" {
-					para := doc.AddParagraph()
-					run := para.AddRun()
-					run.AddText("• " + paragraph)
-				}
-			}
-		}
-
-	case "multimedia", "image":
-		para := doc.AddParagraph()
-		run := para.AddRun()
-		run.AddText("[Media Content]")
-		run.Properties().SetItalic(true)
-
-		for _, subItem := range item.Items {
-			if subItem.Media != nil {
-				if subItem.Media.Video != nil {
-					mediaPara := doc.AddParagraph()
-					mediaRun := mediaPara.AddRun()
-					mediaRun.AddText(fmt.Sprintf("Video: %s", subItem.Media.Video.OriginalUrl))
-				}
-				if subItem.Media.Image != nil {
-					mediaPara := doc.AddParagraph()
-					mediaRun := mediaPara.AddRun()
-					mediaRun.AddText(fmt.Sprintf("Image: %s", subItem.Media.Image.OriginalUrl))
-				}
-			}
-			if subItem.Caption != "" {
-				caption := cleanHTML(subItem.Caption)
-				captionPara := doc.AddParagraph()
-				captionRun := captionPara.AddRun()
-				captionRun.AddText(caption)
-				captionRun.Properties().SetItalic(true)
-			}
-		}
-
-	case "knowledgeCheck":
-		for _, subItem := range item.Items {
-			if subItem.Title != "" {
-				title := cleanHTML(subItem.Title)
-				questionPara := doc.AddParagraph()
-				questionRun := questionPara.AddRun()
-				questionRun.AddText("Question: " + title)
-				questionRun.Properties().SetBold(true)
-			}
-
-			for i, answer := range subItem.Answers {
-				answerText := cleanHTML(answer.Title)
-				correctMark := ""
-				if answer.Correct {
-					correctMark = " [CORRECT]"
-				}
-				answerPara := doc.AddParagraph()
-				answerRun := answerPara.AddRun()
-				answerRun.AddText(fmt.Sprintf("%d. %s%s", i+1, answerText, correctMark))
-			}
-
-			if subItem.Feedback != "" {
-				feedback := cleanHTML(subItem.Feedback)
-				feedbackPara := doc.AddParagraph()
-				feedbackRun := feedbackPara.AddRun()
-				feedbackRun.AddText("Feedback: " + feedback)
-				feedbackRun.Properties().SetItalic(true)
-			}
-		}
-	}
-}
-
+// main is the entry point of the application.
+// It handles command-line arguments, sets up dependencies,
+// and coordinates the parsing and exporting of courses.
 func main() {
-	// Handle version flag
-	if len(os.Args) > 1 && (os.Args[1] == "-v" || os.Args[1] == "--version") {
-		fmt.Printf("articulate-parser %s\n", version.Version)
-		fmt.Printf("Build time: %s\n", version.BuildTime)
-		fmt.Printf("Commit: %s\n", version.GitCommit)
-		os.Exit(0)
-	}
+	// Dependency injection setup
+	htmlCleaner := services.NewHTMLCleaner()
+	parser := services.NewArticulateParser()
+	exporterFactory := exporters.NewFactory(htmlCleaner)
+	app := services.NewApp(parser, exporterFactory)
 
-	if len(os.Args) < 3 {
-		fmt.Println("Usage: articulate-parser <input_uri_or_file> <output_format> [output_path]")
-		fmt.Println("       articulate-parser -v|--version")
-		fmt.Println("  input_uri_or_file: Articulate Rise URI or local JSON file path")
-		fmt.Println("  output_format: md (Markdown) or docx (Word Document)")
-		fmt.Println("  output_path: Optional output file path")
+	// Check for required command-line arguments
+	if len(os.Args) < 4 {
+		fmt.Printf("Usage: %s <source> <format> <output>\n", os.Args[0])
+		fmt.Printf("  source: URI or file path to the course\n")
+		fmt.Printf("  format: export format (%s)\n", joinStrings(app.GetSupportedFormats(), ", "))
+		fmt.Printf("  output: output file path\n")
+		fmt.Println("\nExample:")
+		fmt.Printf("  %s articulate-sample.json markdown output.md\n", os.Args[0])
+		fmt.Printf("  %s https://rise.articulate.com/share/xyz docx output.docx\n", os.Args[0])
 		os.Exit(1)
 	}
 
-	input := os.Args[1]
-	format := strings.ToLower(os.Args[2])
+	source := os.Args[1]
+	format := os.Args[2]
+	output := os.Args[3]
 
-	if format != "md" && format != "docx" {
-		log.Fatal("Output format must be 'md' or 'docx'")
-	}
-
-	parser := NewArticulateParser()
-	var course *Course
 	var err error
 
-	// Determine if input is a URI or file path
-	if strings.HasPrefix(input, "http") {
-		course, err = parser.FetchCourse(input)
+	// Determine if source is a URI or file path
+	if isURI(source) {
+		err = app.ProcessCourseFromURI(source, format, output)
 	} else {
-		course, err = parser.LoadCourseFromFile(input)
+		err = app.ProcessCourseFromFile(source, format, output)
 	}
 
 	if err != nil {
-		log.Fatalf("Failed to load course: %v", err)
+		log.Fatalf("Error processing course: %v", err)
 	}
 
-	// Determine output path
-	var outputPath string
-	if len(os.Args) > 3 {
-		outputPath = os.Args[3]
-	} else {
-		baseDir := "output"
-		os.MkdirAll(baseDir, 0755)
-
-		// Create safe filename from course title
-		safeTitle := regexp.MustCompile(`[^a-zA-Z0-9\-_]`).ReplaceAllString(course.Course.Title, "_")
-		if safeTitle == "" {
-			safeTitle = "articulate_course"
+	fmt.Printf("Successfully exported course to %s\n", output)
 }
 
-		outputPath = filepath.Join(baseDir, fmt.Sprintf("%s.%s", safeTitle, format))
+// isURI checks if a string is a URI by looking for http:// or https:// prefixes.
+//
+// Parameters:
+//   - str: The string to check
+//
+// Returns:
+//   - true if the string appears to be a URI, false otherwise
+func isURI(str string) bool {
+	return len(str) > 7 && (str[:7] == "http://" || str[:8] == "https://")
 }
 
-	// Export based on format
-	switch format {
-	case "md":
-		err = parser.ExportToMarkdown(course, outputPath)
-	case "docx":
-		err = parser.ExportToDocx(course, outputPath)
+// joinStrings concatenates a slice of strings using the specified separator.
+//
+// Parameters:
+//   - strs: The slice of strings to join
+//   - sep: The separator to insert between each string
+//
+// Returns:
+//   - A single string with all elements joined by the separator
+func joinStrings(strs []string, sep string) string {
+	if len(strs) == 0 {
+		return ""
+	}
+	if len(strs) == 1 {
+		return strs[0]
 	}
 
-	if err != nil {
-		log.Fatalf("Failed to export course: %v", err)
+	result := strs[0]
+	for i := 1; i < len(strs); i++ {
+		result += sep + strs[i]
 	}
-
-	fmt.Printf("Course successfully exported to: %s\n", outputPath)
-	fmt.Printf("Course: %s (%d lessons)\n", course.Course.Title, len(course.Course.Lessons))
+	return result
 }

main_test.go

@@ -0,0 +1,175 @@
+// Package main_test provides tests for the main package utility functions.
+package main
+
+import (
+	"testing"
+)
+
+// TestIsURI tests the isURI function with various input scenarios.
+func TestIsURI(t *testing.T) {
+	tests := []struct {
+		name     string
+		input    string
+		expected bool
+	}{
+		{
+			name:     "valid HTTP URI",
+			input:    "http://example.com",
+			expected: true,
+		},
+		{
+			name:     "valid HTTPS URI",
+			input:    "https://example.com",
+			expected: true,
+		},
+		{
+			name:     "valid Articulate Rise URI",
+			input:    "https://rise.articulate.com/share/N_APNg40Vr2CSH2xNz-ZLATM5kNviDIO#/",
+			expected: true,
+		},
+		{
+			name:     "local file path",
+			input:    "C:\\Users\\test\\file.json",
+			expected: false,
+		},
+		{
+			name:     "relative file path",
+			input:    "./sample.json",
+			expected: false,
+		},
+		{
+			name:     "filename only",
+			input:    "sample.json",
+			expected: false,
+		},
+		{
+			name:     "empty string",
+			input:    "",
+			expected: false,
+		},
+		{
+			name:     "short string",
+			input:    "http",
+			expected: false,
+		},
+		{
+			name:     "malformed URI",
+			input:    "htp://example.com",
+			expected: false,
+		},
+		{
+			name:     "FTP URI",
+			input:    "ftp://example.com",
+			expected: false,
+		},
+		{
+			name:     "HTTP with extra characters",
+			input:    "xhttp://example.com",
+			expected: false,
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			result := isURI(tt.input)
+			if result != tt.expected {
+				t.Errorf("isURI(%q) = %v, want %v", tt.input, result, tt.expected)
+			}
+		})
+	}
+}
+
+// TestJoinStrings tests the joinStrings function with various input scenarios.
+func TestJoinStrings(t *testing.T) {
+	tests := []struct {
+		name      string
+		strs      []string
+		separator string
+		expected  string
+	}{
+		{
+			name:      "empty slice",
+			strs:      []string{},
+			separator: ", ",
+			expected:  "",
+		},
+		{
+			name:      "single string",
+			strs:      []string{"hello"},
+			separator: ", ",
+			expected:  "hello",
+		},
+		{
+			name:      "two strings with comma separator",
+			strs:      []string{"markdown", "docx"},
+			separator: ", ",
+			expected:  "markdown, docx",
+		},
+		{
+			name:      "three strings with comma separator",
+			strs:      []string{"markdown", "md", "docx"},
+			separator: ", ",
+			expected:  "markdown, md, docx",
+		},
+		{
+			name:      "multiple strings with pipe separator",
+			strs:      []string{"option1", "option2", "option3"},
+			separator: " | ",
+			expected:  "option1 | option2 | option3",
+		},
+		{
+			name:      "strings with no separator",
+			strs:      []string{"a", "b", "c"},
+			separator: "",
+			expected:  "abc",
+		},
+		{
+			name:      "strings with newline separator",
+			strs:      []string{"line1", "line2", "line3"},
+			separator: "\n",
+			expected:  "line1\nline2\nline3",
+		},
+		{
+			name:      "empty strings in slice",
+			strs:      []string{"", "middle", ""},
+			separator: "-",
+			expected:  "-middle-",
+		},
+		{
+			name:      "nil slice",
+			strs:      nil,
+			separator: ", ",
+			expected:  "",
+		},
+	}
+
+	for _, tt := range tests {
+		t.Run(tt.name, func(t *testing.T) {
+			result := joinStrings(tt.strs, tt.separator)
+			if result != tt.expected {
+				t.Errorf("joinStrings(%v, %q) = %q, want %q", tt.strs, tt.separator, result, tt.expected)
+			}
+		})
+	}
+}
+
+// BenchmarkIsURI benchmarks the isURI function performance.
+func BenchmarkIsURI(b *testing.B) {
+	testStr := "https://rise.articulate.com/share/N_APNg40Vr2CSH2xNz-ZLATM5kNviDIO#/"
+
+	b.ResetTimer()
+	for i := 0; i < b.N; i++ {
+		isURI(testStr)
+	}
+}
+
+// BenchmarkJoinStrings benchmarks the joinStrings function performance.
+func BenchmarkJoinStrings(b *testing.B) {
+	strs := []string{"markdown", "md", "docx", "word", "pdf", "html"}
+	separator := ", "
+
+	b.ResetTimer()
+	for i := 0; i < b.N; i++ {
+		joinStrings(strs, separator)
+	}
+}

scripts/build.ps1

@@ -531,6 +531,11 @@ try {
 	if ($Failed -gt 0) {
 		exit 1
 	}
+
+	# Clean up environment variables to avoid contaminating future builds
+	Remove-Item Env:GOOS -ErrorAction SilentlyContinue
+	Remove-Item Env:GOARCH -ErrorAction SilentlyContinue
+	Remove-Item Env:CGO_ENABLED -ErrorAction SilentlyContinue
 } finally {
 	Pop-Location
 }

scripts/build.sh

@@ -217,6 +217,14 @@ if [ "$SHOW_TARGETS" = true ]; then
     exit 0
 fi
 
+# Validate Go installation
+if ! command -v go >/dev/null 2>&1; then
+    echo "Error: Go is not installed or not in PATH"
+    echo "Please install Go from https://golang.org/dl/"
+    echo "Or if running on Windows, use the PowerShell script: scripts\\build.ps1"
+    exit 1
+fi
+
 # Validate entry point exists
 if [ ! -f "$ENTRYPOINT" ]; then
     echo "Error: Entry point file '$ENTRYPOINT' does not exist"
@@ -315,7 +323,7 @@ for idx in "${!TARGETS[@]}"; do
         fi
         build_cmd+=("${GO_BUILD_FLAGS_ARRAY[@]}" -o "$OUTDIR/$BIN" "$ENTRYPOINT")
 
-        if GOOS="$os" GOARCH="$arch" "${build_cmd[@]}" 2>"$OUTDIR/$BIN.log"; then
+        if CGO_ENABLED=0 GOOS="$os" GOARCH="$arch" "${build_cmd[@]}" 2>"$OUTDIR/$BIN.log"; then
             update_status $((idx + 1)) '✔' "$BIN done"
             rm -f "$OUTDIR/$BIN.log"
         else
@@ -356,3 +364,6 @@ if [ "$VERBOSE" = true ]; then
     echo "  ────────────────────────────────────────────────"
     printf "  Total: %d/%d successful, %s total size\n" "$success_count" "${#TARGETS[@]}" "$(numfmt --to=iec-i --suffix=B $total_size 2>/dev/null || echo "${total_size} bytes")"
 fi
+
+# Clean up environment variables to avoid contaminating future builds
+unset GOOS GOARCH CGO_ENABLED