freealberta/map/instruct/CUT_IMPLEMENTATION_SUMMARY.md

Cut Feature Implementation Summary

Overview

Successfully implemented the Cut feature for the map application, allowing admins to create polygon overlays and users to view them on the public map. Updated: Fixed Content Security Policy violations by removing all inline event handlers and implementing proper event delegation.

Database Changes

New Table: cuts

Added cuts table creation to build-nocodb.sh with the following columns:

• id (Primary Key)
• name (Required)
• description (Optional)
• color (Default: #3388ff)
• opacity (Default: 0.3)
• category (Custom, Ward, Neighborhood, District)
• is_public (Boolean - visible on public map)
• is_official (Boolean - marked as official)
• geojson (Required - polygon data)
• bounds (Calculated bounds for map fitting)
• created_by, created_at, updated_at (Audit fields)

Backend Implementation

API Endpoints

• GET /api/cuts - Get all cuts (filtered by permissions)
• GET /api/cuts/public - Get public cuts for map display
• GET /api/cuts/:id - Get single cut
• POST /api/cuts - Create cut (admin only)
• PUT /api/cuts/:id - Update cut (admin only)
• DELETE /api/cuts/:id - Delete cut (admin only)

Files Created/Modified

• ✅ app/controllers/cutsController.js - CRUD operations
• ✅ app/routes/cuts.js - API routes with auth middleware
• ✅ app/routes/index.js - Added cuts routes
• ✅ app/config/index.js - Added cuts table ID configuration
• ✅ build-nocodb.sh - Added cuts table creation

Frontend Implementation

Public Map Features

• ✅ Cut selector dropdown in map controls
• ✅ Collapsible legend showing current cut info
• ✅ Single cut display with proper styling
• ✅ Color and opacity from cut properties

Admin Features

• ✅ Interactive polygon drawing with click-to-add-points
• ✅ Drawing toolbar with finish, undo, clear, cancel buttons
• ✅ Cut properties form with color picker and opacity slider
• ✅ Cut management list with search and filtering
• ✅ Edit, duplicate, delete functionality
• ✅ Import/export cuts as JSON
• ✅ Map preview during editing

Files Created/Modified

• ✅ app/public/js/cut-drawing.js - Polygon drawing functionality
• ✅ app/public/js/cut-manager.js - Cut CRUD and display logic
• ✅ app/public/js/cut-controls.js - Public map cut controls
• ✅ app/public/js/admin-cuts.js - Admin cut management
• ✅ app/public/css/modules/cuts.css - Cut-specific styling
• ✅ app/public/css/style.css - Added cuts CSS import
• ✅ app/public/index.html - Added cut controls and legend
• ✅ app/public/admin.html - Added cuts admin section
• ✅ app/public/js/main.js - Initialize cut manager and controls
• ✅ app/public/js/map-manager.js - Added getMap() export

Key Features Implemented

Drawing System

• Click-to-add-points polygon creation
• Visual vertex markers with hover effects
• Dynamic polyline connecting vertices
• Minimum 3 points validation
• Undo last point and clear all functionality
• Cancel drawing at any time

Cut Properties

• Name (required)
• Description (optional)
• Color picker with hex display
• Opacity slider with percentage display
• Category selection (Custom, Ward, Neighborhood, District)
• Public visibility toggle
• Official cut designation

Management Features

• List all cuts with badges (Public/Private, Official)
• Search cuts by name/description
• Filter by category
• View cut on map with bounds fitting
• Edit existing cuts (populate form from data)
• Duplicate cuts (creates copy with modified name)
• Delete with confirmation
• Export all cuts as JSON
• Import cuts from JSON file with validation

Public Display

• Dropdown selector with "No overlay" option
• Grouped by category in selector
• Single cut display (replace previous when selecting new)
• Legend showing cut name, color, description
• Collapsible legend with expand/collapse toggle
• Proper styling with cut's color and opacity

Integration Points

Authentication & Authorization

• Uses existing auth middleware
• Admin-only creation/editing/deletion
• Public API for map display
• Respects temp user permissions

Existing Systems

• Integrates with NocoDB service layer
• Uses existing notification system
• Follows established UI patterns
• Works with existing map controls

Testing Recommendations

1. Database Setup

   • Run updated build-nocodb.sh to create cuts table
   • Verify table creation and column types

2. API Testing

   • Test all CRUD operations
   • Verify permission restrictions
   • Test public vs admin endpoints

3. Drawing Functionality

   • Test polygon creation with various point counts
   • Test undo/clear/cancel operations
   • Verify minimum 3 points validation

4. Cut Management

   • Test create, edit, duplicate, delete operations
   • Test search and filtering
   • Test import/export functionality

5. Map Display

   • Test cut selection and display
   • Verify legend updates
   • Test bounds fitting

Future Enhancements

1. Multiple Cut Display - Show multiple cuts simultaneously
2. Cut Statistics - Calculate area, perimeter
3. Location Filtering - Filter locations by selected cut
4. Cut Sharing - Share cuts via URL
5. Advanced Editing - Edit polygon vertices after creation
6. Cut Templates - Pre-defined shapes for quick creation

Recent Updates - Content Security Policy Compliance

CSP Violations Fixed (Latest Update)

• Problem: Inline event handlers (onclick, onchange) were violating Content Security Policy
• Solution: Replaced all inline handlers with proper event delegation
• Files Updated:
  • cut-controls.js - Completely refactored populateCutSelector() function
  • index.html - Removed inline handlers from mobile overlay modal
  • map-controls.css - Enhanced dropdown styles and removed auto-show behavior

Implementation Details

1. Cut Selector Dropdown: Now uses event delegation with data-action attributes
2. Mobile Overlay Modal: Converted to event delegation for all button clicks
3. Legend Controls: Updated to use proper event listeners instead of inline handlers
4. Enhanced User Experience:
   • Dropdown only shows when clicked (removed auto-focus behavior)
   • Better mobile responsiveness
   • Consistent checkbox-style interface across desktop and mobile
   • Proper pointer event handling for smooth interactions

Technical Improvements

• Event Delegation: All click handlers now use addEventListener with event delegation
• Data Attributes: Using data-action and data-cut-id for clean event handling
• DOM Manipulation: Creating elements programmatically instead of innerHTML with inline handlers
• CSP Compliance: Zero inline event handlers remaining in the codebase

Installation Steps

1. Update database: Run ./build-nocodb.sh to create cuts table
2. Set environment variable: Add NOCODB_CUTS_SHEET if using custom table ID
3. Restart application to load new API routes
4. Access admin panel and navigate to "Map Cuts" section
5. Create test cuts and verify public map display

The Cut feature is now fully implemented, CSP-compliant, and ready for testing!