freealberta/map/instruct/CUT_PUBLIC_IMPLEMENTATION.md

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)

<!-- 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

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