Add version control system functionality with branch management, history tracking, and merge operations

memory-bank/features/moderation/implementation.md

@@ -57,6 +57,16 @@
    - Added filter state management
    - Enhanced URL handling
 
+5. `templates/moderation/partials/location_map.html` and `location_widget.html`
+   - Added Leaflet maps integration
+   - Enhanced location selection
+   - Improved geocoding
+
+6. `templates/moderation/partials/coaster_fields.html`
+   - Added detailed coaster stats form
+   - Enhanced validation
+   - Improved field organization
+
 ## Testing Notes
 
 ### Tested Scenarios
@@ -66,6 +76,9 @@
 - Loading states and error handling
 - Filter functionality
 - Form submissions and validation
+- Location selection and mapping
+- Dark mode transitions
+- Toast notifications
 
 ### Browser Support
 - Chrome 90+
@@ -73,6 +86,17 @@
 - Safari 14+
 - Edge 90+
 
+## Dependencies
+- HTMX
+- AlpineJS
+- TailwindCSS 
+- Leaflet (for maps)
+
+## Known Issues
+- Filter reset might not clear all states
+- Mobile scroll performance with many items
+- Loading skeleton flicker on fast connections
+
 ## Next Steps
 
 ### 1. Performance Optimization
@@ -101,15 +125,4 @@
 - Update user guide with new features
 - Add keyboard shortcut documentation
 - Update accessibility guidelines
-- Add performance benchmarks
-
-## Known Issues
-- Filter reset might not clear all states
-- Mobile scroll performance with many items
-- Loading skeleton flicker on fast connections
-
-## Dependencies
-- HTMX
-- AlpineJS
-- TailwindCSS
-- Leaflet (for maps)
+- Add performance benchmarks

memory-bank/features/version-control/implementation-plan.md

@@ -0,0 +1,292 @@
+# Version Control System Enhancement Plan
+
+## Current Implementation
+The project currently uses django-simple-history with custom extensions:
+- `HistoricalModel` base class for history tracking
+- `HistoricalChangeMixin` for change tracking and diff computation
+- `HistoricalSlug` for slug history management
+
+## Enhanced Version Control Standards
+
+### 1. Core VCS Features
+
+#### Branching System
+```python
+class VersionBranch:
+    name = models.CharField(max_length=255)
+    parent = models.ForeignKey('self', null=True)
+    created_at = models.DateTimeField(auto_now_add=True)
+    metadata = models.JSONField()
+```
+
+- Support for feature branches
+- Parallel version development
+- Branch merging capabilities
+- Conflict resolution system
+
+#### Tagging System
+```python
+class VersionTag:
+    name = models.CharField(max_length=255)
+    version = models.ForeignKey(HistoricalRecord)
+    metadata = models.JSONField()
+```
+
+- Named versions (releases, milestones)
+- Semantic versioning support
+- Tag annotations and metadata
+
+#### Change Sets
+```python
+class ChangeSet:
+    branch = models.ForeignKey(VersionBranch)
+    changes = models.JSONField()  # Structured changes
+    metadata = models.JSONField()
+    dependencies = models.JSONField()
+```
+
+- Atomic change grouping
+- Dependency tracking
+- Rollback capabilities
+
+### 2. Full Stack Integration
+
+#### Frontend Integration
+
+##### Version Control UI
+```typescript
+interface VersionControlUI {
+  // Core Components
+  VersionHistory: Component;
+  BranchView: Component;
+  DiffViewer: Component;
+  MergeResolver: Component;
+  
+  // State Management
+  versionStore: {
+    currentVersion: Version;
+    branches: Branch[];
+    history: HistoryEntry[];
+    pendingChanges: Change[];
+  };
+  
+  // Actions
+  actions: {
+    createBranch(): Promise<void>;
+    mergeBranch(): Promise<void>;
+    revertChanges(): Promise<void>;
+    resolveConflicts(): Promise<void>;
+  };
+}
+```
+
+##### Real-time Collaboration
+```typescript
+interface CollaborationSystem {
+  // WebSocket integration
+  socket: WebSocket;
+  
+  // Change tracking
+  pendingChanges: Map<string, Change>;
+  
+  // Conflict resolution
+  conflictResolver: ConflictResolver;
+}
+```
+
+##### HTMX Integration
+```html
+<!-- Version Control Components -->
+<div class="version-control-panel"
+     hx-get="/api/vcs/status"
+     hx-trigger="load, every 30s">
+  
+  <!-- Branch Selector -->
+  <div class="branch-selector"
+       hx-get="/api/vcs/branches"
+       hx-target="#branch-list">
+  </div>
+  
+  <!-- Change History -->
+  <div class="history-view"
+       hx-get="/api/vcs/history"
+       hx-trigger="load, branch-change from:body">
+  </div>
+  
+  <!-- Merge Interface -->
+  <div class="merge-panel"
+       hx-post="/api/vcs/merge"
+       hx-trigger="merge-requested">
+  </div>
+</div>
+```
+
+#### Backend Integration
+
+##### API Layer
+```python
+class VersionControlViewSet(viewsets.ModelViewSet):
+    @action(detail=True, methods=['post'])
+    def create_branch(self, request):
+        """Create new version branch"""
+        
+    @action(detail=True, methods=['post'])
+    def merge_branch(self, request):
+        """Merge branches with conflict resolution"""
+        
+    @action(detail=True, methods=['post'])
+    def tag_version(self, request):
+        """Create version tag"""
+        
+    @action(detail=True, methods=['get'])
+    def changelog(self, request):
+        """Get structured change history"""
+```
+
+##### Change Tracking System
+```python
+class ChangeTracker:
+    """Track changes across the system"""
+    def track_change(self, instance, change_type, metadata=None):
+        """Record a change in the system"""
+        
+    def batch_track(self, changes):
+        """Track multiple changes atomically"""
+        
+    def compute_diff(self, version1, version2):
+        """Compute detailed difference between versions"""
+```
+
+### 3. Data Integrity & Validation
+
+#### Validation System
+```python
+class VersionValidator:
+    """Validate version control operations"""
+    def validate_branch_creation(self, branch_data):
+        """Validate branch creation request"""
+        
+    def validate_merge(self, source_branch, target_branch):
+        """Validate branch merge possibility"""
+        
+    def validate_revert(self, version, target_state):
+        """Validate revert operation"""
+```
+
+#### Consistency Checks
+```python
+class ConsistencyChecker:
+    """Ensure data consistency"""
+    def check_reference_integrity(self):
+        """Verify all version references are valid"""
+        
+    def verify_branch_hierarchy(self):
+        """Verify branch relationships"""
+        
+    def validate_change_sets(self):
+        """Verify change set consistency"""
+```
+
+### 4. Advanced Features
+
+#### Merge Strategies
+```python
+class MergeStrategy:
+    """Define how merges are handled"""
+    def auto_merge(self, source, target):
+        """Attempt automatic merge"""
+        
+    def resolve_conflicts(self, conflicts):
+        """Handle merge conflicts"""
+        
+    def apply_resolution(self, resolution):
+        """Apply conflict resolution"""
+```
+
+#### Dependency Management
+```python
+class DependencyTracker:
+    """Track version dependencies"""
+    def track_dependencies(self, change_set):
+        """Record dependencies for changes"""
+        
+    def verify_dependencies(self, version):
+        """Verify all dependencies are met"""
+        
+    def resolve_dependencies(self, missing_deps):
+        """Resolve missing dependencies"""
+```
+
+## Implementation Phases
+
+### Phase 1: Core VCS Enhancement (Weeks 1-4)
+1. Implement branching system
+2. Add tagging support
+3. Develop change set tracking
+4. Create basic frontend interface
+
+### Phase 2: Full Stack Integration (Weeks 5-8)
+1. Build comprehensive frontend UI
+2. Implement real-time collaboration
+3. Develop API endpoints
+4. Add WebSocket support
+
+### Phase 3: Advanced Features (Weeks 9-12)
+1. Implement merge strategies
+2. Add dependency tracking
+3. Enhance conflict resolution
+4. Build monitoring system
+
+### Phase 4: Testing & Optimization (Weeks 13-16)
+1. Comprehensive testing
+2. Performance optimization
+3. Security hardening
+4. Documentation completion
+
+## Success Metrics
+
+### Technical Metrics
+- Branch operation speed (<500ms)
+- Merge success rate (>95%)
+- Conflict resolution time (<5min avg)
+- Version retrieval speed (<200ms)
+
+### User Experience Metrics
+- UI response time (<300ms)
+- Successful merges (>90%)
+- User satisfaction score (>4.5/5)
+- Feature adoption rate (>80%)
+
+### System Health Metrics
+- System uptime (>99.9%)
+- Data integrity (100%)
+- Backup success rate (100%)
+- Recovery time (<5min)
+
+## Monitoring & Maintenance
+
+### System Monitoring
+- Real-time performance tracking
+- Error rate monitoring
+- Resource usage tracking
+- User activity monitoring
+
+### Maintenance Tasks
+- Regular consistency checks
+- Automated testing
+- Performance optimization
+- Security updates
+
+## Security Considerations
+
+### Access Control
+- Role-based permissions
+- Audit logging
+- Activity monitoring
+- Security scanning
+
+### Data Protection
+- Encryption at rest
+- Secure transmission
+- Regular backups
+- Data retention policies

memory-bank/features/version-control/implementation-status.md

@@ -0,0 +1,114 @@
+# Version Control System Implementation Status
+
+## Overview
+The version control system has been successfully implemented according to the implementation plan and technical guide. The system provides a robust version control solution integrated with django-simple-history and enhanced with branching, merging, and real-time collaboration capabilities.
+
+## Implemented Components
+
+### 1. Core Models
+```python
+# Core version control models in history_tracking/models.py
+- VersionBranch: Manages parallel development branches
+- VersionTag: Handles version tagging and releases
+- ChangeSet: Tracks atomic groups of changes
+- Integration with HistoricalModel and HistoricalChangeMixin
+```
+
+### 2. Business Logic Layer
+```python
+# Managers and utilities in history_tracking/managers.py and utils.py
+- BranchManager: Branch operations and management
+- ChangeTracker: Change tracking and history
+- MergeStrategy: Merge operations and conflict handling
+- Utilities for conflict resolution and diff computation
+```
+
+### 3. Frontend Integration
+```html
+# HTMX-based components in history_tracking/templates/
+- Version Control Panel (version_control_panel.html)
+- Branch Management (branch_list.html, branch_create.html)
+- Change History Viewer (history_view.html)
+- Merge Interface (merge_panel.html, merge_conflicts.html)
+```
+
+### 4. API Layer
+```python
+# Views and endpoints in history_tracking/views.py
+- VersionControlPanel: Main VCS interface
+- BranchListView: Branch management
+- HistoryView: Change history display
+- MergeView: Merge operations
+- BranchCreateView: Branch creation
+- TagCreateView: Version tagging
+```
+
+### 5. Signal Handlers
+```python
+# Signal handlers in history_tracking/signals.py
+- Automatic change tracking
+- Changeset management
+- Branch context management
+```
+
+## Database Schema Changes
+- Created models for branches, tags, and changesets
+- Added proper indexes for performance
+- Implemented GenericForeignKey relationships for flexibility
+- Migrations created and applied successfully
+
+## URL Configuration
+```python
+# Added to thrillwiki/urls.py
+path("vcs/", include("history_tracking.urls", namespace="history"))
+```
+
+## Integration Points
+1. django-simple-history integration
+2. HTMX for real-time updates
+3. Generic relations for flexibility
+4. Signal handlers for automatic tracking
+
+## Features Implemented
+- [x] Branch creation and management
+- [x] Version tagging system
+- [x] Change tracking and history
+- [x] Merge operations with conflict resolution
+- [x] Real-time UI updates via HTMX
+- [x] Generic content type support
+- [x] Atomic change grouping
+- [x] Branch relationship management
+
+## Next Steps
+1. Add comprehensive test suite
+2. Implement performance monitoring
+3. Add user documentation
+4. Consider adding advanced features like:
+   - Branch locking
+   - Advanced merge strategies
+   - Custom diff viewers
+
+## Technical Documentation
+- Implementation plan: [implementation-plan.md](implementation-plan.md)
+- Technical guide: [technical-guide.md](technical-guide.md)
+- API documentation: To be created
+- User guide: To be created
+
+## Performance Considerations
+- Indexed key fields for efficient querying
+- Optimized database schema
+- Efficient change tracking
+- Real-time updates without full page reloads
+
+## Security Measures
+- Login required for all VCS operations
+- Proper validation of all inputs
+- CSRF protection
+- Access control on branch operations
+
+## Monitoring
+Future monitoring needs:
+- Branch operation metrics
+- Merge success rates
+- Conflict frequency
+- System performance metrics

memory-bank/features/version-control/technical-guide.md

@@ -0,0 +1,325 @@
+# Version Control System Technical Implementation Guide
+
+## System Overview
+The version control system implements full VCS capabilities with branching, merging, and collaboration features, building upon django-simple-history while adding robust versioning capabilities across the full stack.
+
+## Core VCS Features
+
+### 1. Branching System
+
+```python
+from vcs.models import VersionBranch, VersionTag, ChangeSet
+
+class BranchManager:
+    def create_branch(name: str, parent: Optional[VersionBranch] = None):
+        """Create a new branch"""
+        return VersionBranch.objects.create(
+            name=name,
+            parent=parent,
+            metadata={'created_by': current_user}
+        )
+    
+    def merge_branches(source: VersionBranch, target: VersionBranch):
+        """Merge two branches with conflict resolution"""
+        merger = MergeStrategy()
+        return merger.merge(source, target)
+
+    def list_branches():
+        """Get all branches with their relationships"""
+        return VersionBranch.objects.select_related('parent').all()
+```
+
+### 2. Change Tracking
+
+```python
+class ChangeTracker:
+    def record_change(model_instance, change_type, metadata=None):
+        """Record a change in the system"""
+        return ChangeSet.objects.create(
+            instance=model_instance,
+            change_type=change_type,
+            metadata=metadata or {},
+            branch=get_current_branch()
+        )
+
+    def get_changes(branch: VersionBranch):
+        """Get all changes in a branch"""
+        return ChangeSet.objects.filter(branch=branch).order_by('created_at')
+```
+
+### 3. Frontend Integration
+
+#### State Management (React/TypeScript)
+```typescript
+interface VCSState {
+  currentBranch: Branch;
+  branches: Branch[];
+  changes: Change[];
+  conflicts: Conflict[];
+}
+
+class VCSStore {
+  private state: VCSState;
+  
+  async switchBranch(branchName: string): Promise<void> {
+    // Implementation
+  }
+  
+  async createBranch(name: string): Promise<void> {
+    // Implementation
+  }
+  
+  async mergeBranch(source: string, target: string): Promise<void> {
+    // Implementation
+  }
+}
+```
+
+#### UI Components
+```typescript
+// Branch Selector Component
+const BranchSelector: React.FC = () => {
+  const branches = useVCSStore(state => state.branches);
+  
+  return (
+    <div className="branch-selector">
+      {branches.map(branch => (
+        <BranchItem key={branch.id} branch={branch} />
+      ))}
+    </div>
+  );
+};
+
+// Change History Component
+const ChangeHistory: React.FC = () => {
+  const changes = useVCSStore(state => state.changes);
+  
+  return (
+    <div className="change-history">
+      {changes.map(change => (
+        <ChangeItem key={change.id} change={change} />
+      ))}
+    </div>
+  );
+};
+```
+
+### 4. API Integration
+
+#### Django REST Framework ViewSets
+```python
+class VCSViewSet(viewsets.ModelViewSet):
+    @action(detail=True, methods=['post'])
+    def create_branch(self, request):
+        name = request.data.get('name')
+        parent = request.data.get('parent')
+        
+        branch = BranchManager().create_branch(name, parent)
+        return Response(BranchSerializer(branch).data)
+
+    @action(detail=True, methods=['post'])
+    def merge(self, request):
+        source = request.data.get('source')
+        target = request.data.get('target')
+        
+        try:
+            result = BranchManager().merge_branches(source, target)
+            return Response(result)
+        except MergeConflict as e:
+            return Response({'conflicts': e.conflicts}, status=409)
+```
+
+### 5. Conflict Resolution
+
+```python
+class ConflictResolver:
+    def detect_conflicts(source: ChangeSet, target: ChangeSet) -> List[Conflict]:
+        """Detect conflicts between changes"""
+        conflicts = []
+        # Implementation
+        return conflicts
+
+    def resolve_conflict(conflict: Conflict, resolution: Resolution):
+        """Apply conflict resolution"""
+        with transaction.atomic():
+            # Implementation
+```
+
+### 6. Real-time Collaboration
+
+```python
+class CollaborationConsumer(AsyncWebsocketConsumer):
+    async def connect(self):
+        await self.channel_layer.group_add(
+            f"branch_{self.branch_id}",
+            self.channel_name
+        )
+
+    async def receive_change(self, event):
+        """Handle incoming changes"""
+        change = event['change']
+        await self.process_change(change)
+```
+
+## Best Practices
+
+### 1. Branch Management
+- Create feature branches for isolated development
+- Use meaningful branch names
+- Clean up merged branches
+- Regular synchronization with main branch
+
+### 2. Change Management
+- Atomic changes
+- Clear change descriptions
+- Related changes grouped in changesets
+- Regular commits
+
+### 3. Conflict Resolution
+- Early conflict detection
+- Clear conflict documentation
+- Structured resolution process
+- Team communication
+
+### 4. Performance Optimization
+- Efficient change tracking
+- Optimized queries
+- Caching strategy
+- Background processing
+
+### 5. Security
+- Access control
+- Audit logging
+- Data validation
+- Secure transmission
+
+## Implementation Examples
+
+### 1. Creating a New Branch
+```python
+branch_manager = BranchManager()
+feature_branch = branch_manager.create_branch(
+    name="feature/new-ui",
+    parent=main_branch
+)
+```
+
+### 2. Recording Changes
+```python
+change_tracker = ChangeTracker()
+change = change_tracker.record_change(
+    instance=model_object,
+    change_type="update",
+    metadata={"field": "title", "reason": "Improvement"}
+)
+```
+
+### 3. Merging Branches
+```python
+try:
+    result = branch_manager.merge_branches(
+        source=feature_branch,
+        target=main_branch
+    )
+except MergeConflict as e:
+    conflicts = e.conflicts
+    resolution = conflict_resolver.resolve_conflicts(conflicts)
+    result = branch_manager.apply_resolution(resolution)
+```
+
+## Error Handling
+
+### 1. Branch Operations
+```python
+try:
+    branch = branch_manager.create_branch(name)
+except BranchExistsError:
+    # Handle duplicate branch
+except InvalidBranchNameError:
+    # Handle invalid name
+```
+
+### 2. Merge Operations
+```python
+try:
+    result = branch_manager.merge_branches(source, target)
+except MergeConflictError as e:
+    # Handle merge conflicts
+except InvalidBranchError:
+    # Handle invalid branch
+```
+
+## Monitoring
+
+### 1. Performance Monitoring
+```python
+class VCSMonitor:
+    def track_operation(operation_type, duration):
+        """Track operation performance"""
+        
+    def check_system_health():
+        """Verify system health"""
+```
+
+### 2. Error Tracking
+```python
+class ErrorTracker:
+    def log_error(error_type, details):
+        """Log system errors"""
+        
+    def analyze_errors():
+        """Analyze error patterns"""
+```
+
+## Testing
+
+### 1. Unit Tests
+```python
+class BranchTests(TestCase):
+    def test_branch_creation(self):
+        """Test branch creation"""
+        
+    def test_branch_merge(self):
+        """Test branch merging"""
+```
+
+### 2. Integration Tests
+```python
+class VCSIntegrationTests(TestCase):
+    def test_complete_workflow(self):
+        """Test complete VCS workflow"""
+        
+    def test_conflict_resolution(self):
+        """Test conflict resolution"""
+```
+
+## Deployment Considerations
+
+### 1. Database Migrations
+- Create necessary tables
+- Add indexes
+- Handle existing data
+
+### 2. Cache Setup
+- Configure Redis
+- Set up caching strategy
+- Implement cache invalidation
+
+### 3. Background Tasks
+- Configure Celery
+- Set up task queues
+- Monitor task execution
+
+## Maintenance
+
+### 1. Regular Tasks
+- Clean up old branches
+- Optimize database
+- Update indexes
+- Verify backups
+
+### 2. Monitoring Tasks
+- Check system health
+- Monitor performance
+- Track error rates
+- Analyze usage patterns