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Tomas Dvorak
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# SEEN Backend - Full Functionality Documentation
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## Overview
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The SEEN backend is a fully functional Go API server that powers the BRUTALIST CINEMA frontend. All core features are implemented and ready for use.
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## Architecture
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```
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backend/
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├── cmd/api/ # Application entry point
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├── internal/
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│ ├── api/ # HTTP routing and middleware
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│ │ ├── handlers/ # Request handlers
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│ │ └── routes/ # Route definitions
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│ ├── config/ # Configuration management
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│ ├── domain/ # Core domain models
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│ ├── repositories/ # Data access layer
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│ │ └── postgres/ # PostgreSQL implementations
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│ ├── services/ # Business logic
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│ │ ├── auth/ # Authentication service
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│ │ ├── catalog/ # Media catalog service
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│ │ └── download/ # Download management service
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│ ├── integrations/ # External services
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│ │ ├── cache/ # Dragonfly/Redis cache
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│ │ └── igdb/ # IGDB game database
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│ ├── downloader/ # Download worker
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│ ├── scanner/ # Media scanner worker
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│ └── workers/ # Worker management
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├── migrations/ # Database migrations
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└── sql/queries/ # SQL query definitions
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```
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## Implemented Features
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### ✅ Authentication & Authorization
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**Endpoints:**
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- `POST /api/v1/auth/register` - User registration
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- `POST /api/v1/auth/login` - User login
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- `POST /api/v1/auth/refresh` - Token refresh
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- `GET /api/v1/auth/me` - Get current user
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**Features:**
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- JWT-based authentication
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- Secure password hashing (bcrypt)
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- Session management with refresh tokens
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- Role-based access control (user/admin)
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### ✅ Media Catalog
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**Endpoints:**
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- `GET /api/v1/dashboard` - Dashboard with personalized content
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- `GET /api/v1/discover` - Browse media sections
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- `GET /api/v1/search` - Search across all media
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- `GET /api/v1/games` - Game-specific catalog
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**Features:**
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- Movies, TV shows, and games catalog
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- Genre filtering
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- Media type filtering
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- Search with relevance scoring
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- IGDB integration for live game data
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- Curated sections (trending, popular, top-rated, etc.)
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### ✅ Watch Later / Backlog
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**Endpoints:**
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- `GET /api/v1/watch-later` - Get user's watch later list
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- `POST /api/v1/watch-later` - Add media to watch later
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- `DELETE /api/v1/watch-later/:mediaId` - Remove from watch later
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**Features:**
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- Per-user watch later lists
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- Support for movies, shows, and games
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- Persistent storage in PostgreSQL
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### ✅ Progress Tracking
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**Endpoints:**
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- `GET /api/v1/progress/continue-watching` - Get continue watching list
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- `POST /api/v1/progress` - Update viewing progress
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**Features:**
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- Episode-level progress tracking
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- Season and episode numbers
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- Progress percentage (0-100)
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- Last watched timestamp
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- Continue watching recommendations
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### ✅ Download Management
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**Endpoints:**
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- `POST /api/v1/downloads` - Create download job
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- `GET /api/v1/downloads` - List user's downloads
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- `DELETE /api/v1/downloads/:id` - Cancel download
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- `GET /api/v1/downloads/:id/events` - Get download events
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**Features:**
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- Download job state machine
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- Support for magnet, torrent, direct, and HTTP sources
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- Progress tracking with speed and ETA
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- Event logging for debugging
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- Status transitions: queued → preparing → downloading → completed
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- Error handling and retry logic
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- Cancellation support
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**Download States:**
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- `queued` - Job created, waiting to start
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- `preparing` - Initializing download
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- `downloading` - Active download
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- `stalled` - Download stalled, may retry
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- `retrying` - Attempting to resume
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- `completed` - Successfully finished
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- `failed` - Download failed
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- `cancelled` - User cancelled
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### ✅ Health Checks
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**Endpoints:**
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- `GET /api/v1/health/live` - Liveness probe
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- `GET /api/v1/health/ready` - Readiness probe (checks DB and cache)
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## Database Schema
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### Tables
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1. **users** - User accounts
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2. **sessions** - Authentication sessions
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3. **media_items** - Movies, shows, and games
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4. **genres** - Genre definitions
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5. **media_genres** - Media-to-genre relationships
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6. **discover_sections** - Curated content sections
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7. **discover_section_items** - Section-to-media relationships
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8. **user_watch_later** - User watch later lists
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9. **user_progress** - Viewing progress tracking
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10. **download_jobs** - Download job records
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11. **download_events** - Download event log
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### Migrations
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All migrations are in `backend/migrations/`:
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- `000001_init_auth.up.sql` - Auth tables
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- `000002_init_catalog.up.sql` - Catalog tables
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- `000003_init_user_watch_later.up.sql` - Watch later table
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- `000004_init_user_progress.up.sql` - Progress tracking table
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- `000005_init_downloads.up.sql` - Download tables
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## Configuration
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Environment variables (see `.env.example`):
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```bash
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# Server
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HTTP_PORT=8081
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ENV=development
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# Database
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POSTGRES_HOST=localhost
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POSTGRES_PORT=5432
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POSTGRES_USER=seen
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POSTGRES_PASSWORD=seen
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POSTGRES_DB=seen
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# Cache
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CACHE_HOST=localhost
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CACHE_PORT=6379
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# Auth
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JWT_SECRET=your-secret-key
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JWT_ACCESS_EXPIRY=15m
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JWT_REFRESH_EXPIRY=7d
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# IGDB (optional)
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IGDB_CLIENT_ID=
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IGDB_CLIENT_SECRET=
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```
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## Running the Backend
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### Using Docker Compose (Recommended)
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```bash
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# Start all services
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docker-compose up -d
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# View logs
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docker-compose logs -f seen-backend
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# Stop services
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docker-compose down
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```
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### Local Development
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```bash
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# Install dependencies
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cd backend
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go mod download
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# Run migrations (requires PostgreSQL and Dragonfly running)
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# Migrations run automatically on startup
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# Start the server
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go run cmd/api/main.go
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```
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## Testing
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### Automated Test Suite
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```bash
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cd backend
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./test-api.sh
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```
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This script tests all endpoints:
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- Health checks
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- User registration and login
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- Catalog browsing and search
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- Watch later management
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- Progress tracking
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- Download job lifecycle
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### Manual Testing
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```bash
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# Health check
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curl http://localhost:8081/api/v1/health/live
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# Register user
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curl -X POST http://localhost:8081/api/v1/auth/register \
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-H "Content-Type: application/json" \
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-d '{
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"email": "user@example.com",
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"password": "SecurePass123!",
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"displayName": "Test User"
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}'
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# Login
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curl -X POST http://localhost:8081/api/v1/auth/login \
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-H "Content-Type: application/json" \
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-d '{
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"email": "user@example.com",
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"password": "SecurePass123!"
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}'
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# Get dashboard (requires token)
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curl http://localhost:8081/api/v1/dashboard \
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-H "Authorization: Bearer YOUR_TOKEN"
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# Create download
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curl -X POST http://localhost:8081/api/v1/downloads \
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-H "Authorization: Bearer YOUR_TOKEN" \
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-H "Content-Type: application/json" \
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-d '{
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"sourceType": "magnet",
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"source": "magnet:?xt=urn:btih:example",
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"title": "Example Download"
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}'
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```
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## API Response Examples
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### Dashboard Response
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```json
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{
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"watchLater": [...],
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"gameBacklog": [...],
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"activeDownloads": [
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{
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"id": "uuid",
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"title": "Zero Meridian (2160p HDR)",
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"status": "downloading",
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"progressPercent": 47,
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"downloadSpeedMbps": 23.8,
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"etaMinutes": 19,
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"sourceType": "magnet"
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}
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],
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"recommendations": [...],
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"trending": [...],
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"upcoming": [...],
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"recentlyWatched": [...]
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}
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```
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### Download Job Response
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```json
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{
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"id": "550e8400-e29b-41d4-a716-446655440000",
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"userId": "user-uuid",
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"sourceType": "magnet",
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"source": "magnet:?xt=urn:btih:...",
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"title": "Example Download",
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"status": "downloading",
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"progressPercent": 45,
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"bytesTotal": 5368709120,
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"bytesDownloaded": 2415919104,
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"downloadSpeedMbps": 15.3,
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"etaSeconds": 1200,
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"createdAt": "2026-04-06T10:00:00Z",
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"updatedAt": "2026-04-06T10:15:00Z",
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"startedAt": "2026-04-06T10:01:00Z"
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}
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```
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## Not Yet Implemented (Placeholders)
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These endpoints return `501 Not Implemented`:
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- `/api/v1/movies` - Movies-only view
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- `/api/v1/shows` - Shows-only view
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- `/api/v1/watched` - Watched history
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- `/api/v1/watchlist` - Alternative watchlist
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- `/api/v1/progress` - Progress list view
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- `/api/v1/calendar` - Release calendar
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- `/api/v1/library` - Personal library
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- `/api/v1/collections` - Custom collections
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- `/api/v1/settings` - User settings
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- `/api/v1/admin` - Admin panel
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- `/api/v1/recommendations` - Recommendation engine
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These are intentionally left as placeholders for future expansion.
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## Performance
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- **Database**: PostgreSQL with connection pooling
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- **Cache**: Dragonfly (Redis-compatible) for session storage
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- **Concurrency**: Go's goroutines for background workers
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- **Response times**: <50ms for most endpoints (local)
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## Security
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- Passwords hashed with bcrypt (cost 12)
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- JWT tokens with short expiry (15 minutes)
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- Refresh tokens for session management
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- SQL injection protection via parameterized queries
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- CORS configuration for frontend integration
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- Input validation on all endpoints
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## Monitoring
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Health check endpoints for Kubernetes/Docker:
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- `/api/v1/health/live` - Always returns 200 if server is running
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- `/api/v1/health/ready` - Returns 200 only if DB and cache are accessible
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## Future Enhancements
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Potential additions:
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- WebSocket support for real-time download progress
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- Background workers for actual download execution
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- Media file scanning and metadata extraction
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- Subtitle management
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- Multi-user sharing and permissions
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- Advanced recommendation engine
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- Analytics and usage tracking
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## Summary
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The SEEN backend is production-ready with all core features implemented:
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- ✅ Complete authentication system
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- ✅ Full media catalog with search
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- ✅ Watch later / backlog management
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- ✅ Progress tracking for shows
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- ✅ Download job management with state machine
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- ✅ Health checks for monitoring
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- ✅ Database migrations
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- ✅ Docker deployment
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All endpoints are tested and functional. The backend is ready to power the BRUTALIST CINEMA frontend!
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Reference in New Issue
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