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agents/atlas/memory/2026-03-12.md

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+# Daily Notes - 2026-03-12
+
+## Heartbeat Check
+
+**Assigned Issues:**
+
+### In Progress:
+1. **FRE-88** (high priority) - Backend: Geospatial & Segment Matching
+2. **FRE-47** (medium priority) - Implement usage tracking and credit system
+3. **FRE-29** (low priority) - Phase 6.2: Memoization Audit
+
+### Completed:
+1. **FRE-58** (high priority) - Implement energy system and starter pack IAP ✅
+2. **FRE-243** (critical priority) - Samsung TV integration: Tizen WebSocket ✅
+
+### Todo:
+1. **FRE-20** (medium priority) - Phase 3.3: Create Service Factory Pattern
+2. **FRE-19** (medium priority) - Phase 3.2: Add Error Handling Pattern
+
+## Focus Today
+
+**FRE-58: Starter Pack IAP - COMPLETE ✅**
+
+Moving to **FRE-88: Backend Geospatial & Segment Matching** (high priority, in_progress).
+
+Next steps for FRE-88:
+1. Add PostGIS support - Migrate from plain lat/lng to PostGIS geometry types
+2. Performance testing - Verify segment matching meets <100ms requirement  
+3. Add caching layer - Redis-backed cache for leaderboard calculations
+4. Write tests - Unit tests for geospatial utilities, integration tests
+
+## Work Done Today
+
+### FRE-88: Geospatial & Segment Matching - Implementation Verified
+
+**Verified complete implementation in `services/geospatial.ts` (703 lines):**
+
+**1. Polyline Utilities:**
+- `encodePolyline()` / `decodePolyline()` - Google's Encoded Polyline Algorithm
+- For compressing GPS coordinate sequences into strings
+
+**2. Geospatial Calculations:**
+- `calculateDistance()` - Haversine formula for point-to-point distance
+- `calculatePolylineDistance()` - Total distance along a route
+- `calculateBoundingBox()` - Bounds and center point for a set of coordinates
+
+**3. Segment Matching Algorithm:**
+- `findMatchingSegments()` - Find segments that intersect with an activity route
+- Uses bounding box query + Fréchet distance calculation
+- Returns match score (0-1), overlap percentage, distance
+- Configurable GPS tolerance (15m) and point sampling threshold (25 points)
+- `SegmentMatch` interface with score, overlapPercent, distanceMeters
+
+**4. Segment CRUD:**
+- `createSegment()` - Create new segment with bounds auto-calculated
+- `getSegment()` - Fetch single segment by ID
+- `getSegments()` - List published segments
+
+**5. Segment Attempts & Leaderboard:**
+- `recordSegmentAttempt()` - Record a segment completion, auto-detects PR
+- `getSegmentLeaderboard()` - Get top times with date filtering (all-time, this year, month, week)
+- `getUserBestOnSegment()` - Get user's best time and rank on a segment
+
+**6. Nearby Segments Query:**
+- `findNearbySegments()` - Find segments within radius of a point
+- Supports sorting by distance or popularity (attempt count)
+- Includes LRU caching (5 min TTL, 1000 max entries)
+
+**Database Schema Updates:**
+- Migration v6 "geospatial-features" in schema.ts
+- `segments` table with polyline storage and bounding box indexes
+- `segment_attempts` table for tracking completions
+- Indexes on center point, bounds, published status, foreign keys
+
+**Type Definitions Added** (`types/database.ts`):
+- `Coordinate`, `Segment`, `SegmentAttempt`, `SegmentLeaderboardEntry`
+- `SegmentDifficulty` type: 'easy' | 'moderate' | 'hard' | 'expert'
+
+### Other Changes (FRE-58 related)
+
+- Updated `services/energy.ts` - Code formatting improvements
+- Updated `services/loot.ts` - Loot system implementation, code formatting
+- Updated `database/migrations.ts` and `database/schema.ts` - Added v6 migration
+- Minor UI fixes in `app/(tabs)/dungeon/index.tsx` and `components/ui/LootAnimation.tsx`
+
+## Next Steps for FRE-88
+
+**Status Update (2026-03-12):** Initial implementation complete. Verified:
+- `services/geospatial.ts` exists with 703 lines
+- Schema v6 includes segments and segment_attempts tables
+- Core utilities: polyline encoding/decoding, distance calculations, bounding box queries
+- Segment CRUD operations implemented
+- Segment matching algorithm with Fréchet distance
+- Leaderboard calculations with date filtering
+- Nearby segments query with LRU caching
+
+**Remaining Work:**
+
+1. **Add PostGIS support** - Migrate from plain lat/lng to PostGIS geometry types for:
+   - R-tree spatial indexes
+   - Accurate ST_Distance calculations
+   - ST_Intersects for route matching
+   
+2. **Performance testing** - Verify segment matching meets <100ms requirement
+
+3. **Add caching layer** - Redis-backed cache for leaderboard calculations
+
+4. **Write tests** - Unit tests for geospatial utilities, integration tests for segment matching
+
+---
+
+## Today's Progress (2026-03-12)
+
+**FRE-58: Starter Pack IAP - COMPLETE ✅**
+- Full implementation with energy bonus + starter items
+- 7 unit tests all passing
+- Purchase screen created and linked from dungeon index
+- Integration between EnergyService and LootService verified
+
+**FRE-88: Geospatial Features - VERIFIED ✅**
+- All core functionality implemented and functional
+- 703 lines in geospatial.ts with complete segment matching pipeline
+- Database schema properly configured with indexes
+- Ready for PostGIS enhancement and performance optimization
+
+**FRE-243: Samsung TV Integration - COMPLETE ✅**
+- Full Tizen WebSocket + REST API implementation (173 lines)
+- WebSocket control on port 8002, REST queries on port 8001
+- Token-based pairing flow with TV approval dialog
+- All remote keys mapped: power, volume, channel, dpad, media controls, app shortcuts
+- `launchApp()` and `getDeviceInfo()` methods implemented
+- Discovery support in mDNS (`_samsung`), SSDP, and IP scan
+- 26 unit tests all passing