Add custom exceptions for geocoding and validation errors; document GeocodeService functionality

memory-bank/activeContext.md

@@ -80,33 +80,32 @@ Location System Implementation
     - Added activity logging
     - Created coordinate sync
     - Matched Django GeoDjango features
+16. ✅ Implemented Geocoding Service:
+    - Created GeocodeService class
+    - Implemented OpenStreetMap integration
+    - Added address normalization
+    - Added coordinate validation
+    - Implemented result caching
+    - Added error handling
+    - Created custom exceptions
 
 ### In Progress
-1. [ ] Geocoding Service Implementation
-   - [ ] OpenStreetMap integration
-   - [ ] Address normalization
-   - [ ] Coordinate validation
-   - [ ] Result caching
-   - [ ] Error handling
-
-### Next Steps
-1. Geocoding Service
-   - [ ] Create GeocodeService class
-   - [ ] Implement address lookup
-   - [ ] Add reverse geocoding
-   - [ ] Add batch processing
-   - [ ] Implement cache management
-   - [ ] Add error handling
-   - [ ] Create validation rules
-
-2. Location Components
+1. Location Components Implementation
    - [ ] Create map component
    - [ ] Add location selection
    - [ ] Implement search interface
    - [ ] Add clustering support
    - [ ] Create location display
 
-3. Performance Optimization
+### Next Steps
+1. Location Components
+   - [ ] Create map component
+   - [ ] Add location selection
+   - [ ] Implement search interface
+   - [ ] Add clustering support
+   - [ ] Create location display
+
+2. Performance Optimization
    - [ ] Implement query caching
    - [ ] Add index optimization
    - [ ] Create monitoring tools
@@ -127,14 +126,17 @@ Location System Implementation
    - Geography type for accurate calculations
    - Spatial indexing with GiST
 
-2. Technical Decisions
-   - Maintain backward compatibility with lat/lon fields
-   - Use activity logging for change tracking
-   - Implement coordinate normalization
-   - Support both geography and geometry types
-   - Add name and type fields for better organization
-   - Use PostGIS functions matching Django's implementation
-   - Implement string representation for consistency
+2. GeocodeService Implementation
+   - OpenStreetMap's Nominatim API integration for cost-effective geocoding
+   - 24-hour cache TTL to reduce API calls
+   - Rate limiting (1 request/second) to comply with API terms
+   - Custom exceptions for better error handling
+   - Batch processing support for multiple addresses
+   - Address normalization and validation
+   - Comprehensive error logging
+   - Cache key strategy using MD5 hashes
+   - Memory-efficient response handling
+   - User-Agent compliance with OpenStreetMap requirements
 
 3. Cache Management
    - 24-hour TTL
@@ -163,18 +165,18 @@ Location System Implementation
    - Statistics rollup
 
 ## Notes and Considerations
-1. Configure OpenStreetMap integration
-2. Consider caching geocoding results
+1. ✅ Configure OpenStreetMap integration
+2. ✅ Consider caching geocoding results
 3. May need clustering for large datasets
 4. Should implement distance-based search
 5. Consider adding location history
 6. Plan for offline maps
 7. Consider adding route planning
-8. Need to handle OpenStreetMap API errors
+8. ✅ Need to handle OpenStreetMap API errors
 9. Consider adding location sharing
 10. Plan for mobile optimization
 11. Consider adding geofencing
-12. Need location validation
+12. ✅ Need location validation
 
 ## Issues to Address
 1. [ ] Configure storage link for avatars
@@ -193,5 +195,5 @@ Location System Implementation
 14. [ ] Add trend analysis tools
 15. [ ] Set up cache invalidation
 16. [ ] Add cache warming jobs
-17. [ ] Set up OpenStreetMap API integration
-18. [ ] Implement OpenStreetMap geocoding
+17. ✅ Set up OpenStreetMap API integration
+18. ✅ Implement OpenStreetMap geocoding