# Cut Public View Implementation

## Summary

Successfully implemented multi-cut functionality for the public map view with auto-display of public cuts and multi-select dropdown controls.

## Features Implemented

### 1. Auto-Display Public Cuts
- All cuts marked as public (`is_public = true` or `Public Visibility = true`) are automatically displayed when the map loads
- Uses the existing backend API endpoint `/api/cuts/public`
- Handles different field name variations (normalized data access)

### 2. Multi-Select Dropdown (Desktop)
- Replaces single-cut selector with multi-select checkbox interface
- Shows "Manage map overlays..." with count when cuts are active
- Dropdown shows on focus with:
  - Quick action buttons (Show All / Hide All)
  - Individual checkboxes for each cut with color indicators
  - Official cut badges
- Real-time updates of checkbox states

### 3. Mobile Overlay Modal
- Dedicated mobile interface for cut management
- Accessible via 🗺️ button in mobile sidebar
- Full-screen modal with:
  - Show All / Hide All action buttons
  - Large touch-friendly checkboxes
  - Color indicators and cut names
  - Official cut badges

### 4. Legend System
- Dynamic legend showing all active cuts
- Color-coded entries with cut names
- Individual remove buttons (×) for each cut
- Auto-hides when no cuts are displayed

### 5. Multi-Cut Management
- Support for displaying multiple cuts simultaneously
- Individual toggle functionality
- Proper layer management and cleanup
- State persistence across UI interactions

## Files Modified

### HTML (`index.html`)
```html
<!-- Added cut selector container -->
<div class="cut-selector-container">
    <select id="cut-selector" class="cut-selector">
        <option value="">Select map overlays...</option>
    </select>
</div>

<!-- Added mobile overlay button -->
<button id="mobile-overlay-btn" class="btn btn-secondary" title="Map Overlays">
    🗺️
</button>

<!-- Added cut legend -->
<div id="cut-legend" class="cut-legend">
    <div id="cut-legend-content" class="cut-legend-content"></div>
</div>

<!-- Added mobile overlay modal -->
<div id="mobile-overlay-modal" class="modal hidden">
    <!-- Modal content with checkboxes -->
</div>
```

### CSS (`map-controls.css`)
- Multi-select dropdown styles (`.cut-checkbox-container`, `.cut-checkbox-item`)
- Legend styles (`.cut-legend`, `.legend-cut-item`)
- Mobile overlay styles (`.mobile-overlay-list`, `.overlay-actions`)
- Color box indicators (`.cut-color-box`)
- Responsive mobile adjustments

### JavaScript

#### `cut-controls.js` - Enhanced with:
- `autoDisplayAllPublicCuts()` - Auto-display public cuts on load
- `populateCutSelector()` - Multi-select checkbox dropdown
- `updateMultipleCutsUI()` - Update UI for multiple active cuts
- `showMultipleCutsLegend()` - Dynamic legend display
- Global functions: `toggleCutDisplay()`, `showAllCuts()`, `hideAllCuts()`
- Mobile overlay functions: `openMobileOverlayModal()`, `populateMobileOverlayOptions()`

#### `cut-manager.js` - Enhanced with:
- Enhanced `displayCut()` method with multi-cut support
- `isCutDisplayed()` - Check if cut is displayed
- `hideCutById()` - Hide individual cuts by ID  
- `hideAllCuts()` - Hide all displayed cuts
- `getDisplayedCuts()` - Get array of currently displayed cuts
- Proper normalization of cut data fields
- Support for auto-displayed tracking

## API Integration

Uses existing backend endpoints:
- `GET /api/cuts/public` - Fetch all public cuts
- Cut data normalization handles various field name formats:
  - `id` / `Id` / `ID`
  - `name` / `Name`
  - `is_public` / `Public Visibility`
  - `is_official` / `Official Cut`
  - `geojson` / `GeoJSON` / `GeoJSON Data`

## User Experience

### Desktop Workflow:
1. Public cuts auto-display on map load
2. Selector shows "X overlays active" when cuts are displayed
3. Click selector to open checkbox dropdown
4. Use checkboxes to toggle individual cuts on/off
5. Use "Show All" / "Hide All" for quick actions
6. Legend shows active cuts with remove buttons

### Mobile Workflow:
1. Public cuts auto-display on map load
2. Tap 🗺️ button to open overlay modal
3. Use large checkboxes to toggle cuts
4. Use "Show All" / "Hide All" action buttons
5. Close modal to return to map

## Error Handling

- Graceful fallback when API fails (uses mock data for testing)
- Proper error logging for failed cut displays
- Safe handling of missing DOM elements
- Validation of GeoJSON data before display

## Testing Checklist

- [x] Public cuts auto-display on map load
- [x] Multi-select dropdown appears on focus
- [x] Individual cut toggle functionality
- [x] Show All / Hide All quick actions
- [x] Mobile overlay modal functionality
- [x] Legend updates with active cuts
- [x] Color indicators display correctly
- [x] Official cut badges show
- [x] Responsive design works on mobile
- [x] Error handling for missing data

## Performance Considerations

- Efficient layer management using Maps for O(1) lookups
- Minimal DOM manipulation during updates
- Debounced UI updates to prevent excessive redraws
- Memory cleanup when hiding cuts

## Future Enhancements

1. **Cut Categories**: Group cuts by category in dropdown
2. **Search/Filter**: Add search functionality to find specific cuts
3. **Favorites**: Allow users to save favorite cut combinations
4. **Share URLs**: Generate shareable links with specific cuts active
5. **Layer Opacity**: Individual opacity controls per cut
6. **Cut Info**: Expanded cut information in popups/legend