# Phase 2 Backend Checkpoint - COMPLETE ✅

**Date**: 2026-02-05  
**Status**: Phase 2 Backend 100% Complete

## What Was Completed

### 1. BUN ORM Migration (COMPLETE)
- ✅ Converted all storage layer from GORM to BUN
- ✅ Generated 7 BUN models from DBML schema using `relspec` tool
- ✅ Updated `pkg/storage/db.go` with BUN connection handling
- ✅ Converted `pkg/storage/repository.go` to use BUN queries
- ✅ Updated seed data to use BUN models

**Generated Models** (`pkg/models/`):
- `sql_public_users.go` → `ModelPublicUser`
- `sql_public_api_keys.go` → `ModelPublicAPIKey`
- `sql_public_hooks.go` → `ModelPublicHook`
- `sql_public_whatsapp_accounts.go` → `ModelPublicWhatsappAccount`
- `sql_public_event_logs.go` → `ModelPublicEventLog`
- `sql_public_sessions.go` → `ModelPublicSession`
- `sql_public_message_cache.go` → `ModelPublicMessageCache`

### 2. ResolveSpec API Integration (COMPLETE)
- ✅ Created `pkg/api/server.go` with ResolveSpec framework
- ✅ Created `pkg/api/security.go` with JWT authentication
- ✅ Auto-generates REST CRUD endpoints for all models
- ✅ Implements row-level security (multi-tenancy)
- ✅ Uses Gorilla Mux router with ResolveSpec handler

**Key Implementation Details**:
```go
// Create model registry and register all models
registry := modelregistry.NewModelRegistry()
registry.RegisterModel("public.users", &models.ModelPublicUser{})
// ... register all 7 models

// Create BUN adapter and handler
bunAdapter := database.NewBunAdapter(db)
handler := restheadspec.NewHandler(bunAdapter, registry)

// Security provider handles JWT auth
secProvider := NewSecurityProvider(cfg.API.JWTSecret, db)
```

### 3. Configuration Updates (COMPLETE)
- ✅ Added `APIConfig` struct to `pkg/config/config.go`:
  ```go
  type APIConfig struct {
      Enabled   bool   // Enable Phase 2 API server
      Host      string // API server host (default: 0.0.0.0)
      Port      int    // API server port (default: 8080)
      JWTSecret string // Secret for JWT signing
  }
  ```

### 4. Code Cleanup (COMPLETE)
- ✅ Deleted deprecated `pkg/auth/` package
- ✅ Deleted deprecated `pkg/webserver/` package
- ✅ All functionality now via ResolveSpec

### 5. SQL Migrations (COMPLETE)
- ✅ Generated PostgreSQL migration: `sql/postgres/001_init_schema.up.sql`
- ✅ Created rollback script: `sql/postgres/001_init_schema.down.sql`
- ✅ Includes all tables, indexes, constraints, foreign keys

### 6. Example Code (COMPLETE)
- ✅ Updated `examples/phase2_integration.go`
- ✅ Shows how to start API server with ResolveSpec

## Database Schema

**7 Tables with Full Relationships**:
1. `users` - User accounts (admin, user roles)
2. `api_keys` - API authentication keys  
3. `hooks` - Webhook configurations
4. `whatsapp_accounts` - Connected WhatsApp accounts
5. `event_logs` - Activity audit trail
6. `sessions` - User login sessions
7. `message_cache` - WhatsApp message history

**Key Constraints**:
- Foreign keys: api_keys → users, hooks → users, etc.
- Unique constraints: username, email, api_key, phone_number
- Soft delete support: deleted_at columns
- Indexes on all foreign keys and frequently queried fields

## API Endpoints (Auto-Generated)

**Authentication** (Manual):
```
POST   /api/v1/auth/login   - Login to get JWT token
POST   /api/v1/auth/logout  - Logout and invalidate token
GET    /health              - Health check
```

**CRUD Endpoints** (Auto-generated by ResolveSpec for each model):
```
GET    /api/v1/{resource}       - List (with filtering, pagination)
POST   /api/v1/{resource}       - Create
GET    /api/v1/{resource}/:id   - Get by ID
PUT    /api/v1/{resource}/:id   - Update
DELETE /api/v1/{resource}/:id   - Delete (soft delete)
```

Resources: `users`, `api_keys`, `hooks`, `whatsapp_accounts`, `event_logs`, `sessions`, `message_cache`

## Security Features

1. **JWT Authentication** - Stateless token-based auth
2. **Row-Level Security** - Users only see their own data
3. **Multi-Tenancy** - Automatic user_id filtering
4. **API Keys** - Alternative authentication method
5. **Session Management** - Track active sessions with expiration
6. **Bcrypt Passwords** - Secure password hashing

## Files Reference

**Working and Complete**:
- `pkg/storage/db.go` - BUN connection ✅
- `pkg/storage/repository.go` - All repositories ✅
- `pkg/storage/seed.go` - Seed data ✅
- `pkg/models/*.go` - Generated BUN models ✅
- `pkg/api/server.go` - ResolveSpec server ✅
- `pkg/api/security.go` - JWT auth ✅
- `pkg/config/config.go` - Updated config ✅
- `sql/schema.dbml` - Database schema ✅
- `sql/postgres/001_init_schema.up.sql` - Migration ✅
- `examples/phase2_integration.go` - Example ✅

**Makefile Commands**:
```bash
make generate-models  # Regenerate models from DBML
```

## How to Run Phase 2 API Server

```bash
# 1. Create config.json with database settings
{
  "api": {
    "enabled": true,
    "host": "0.0.0.0",
    "port": 8080,
    "jwt_secret": "your-secret-key"
  },
  "database": {
    "type": "postgres",
    "host": "localhost",
    "port": 5432,
    "username": "postgres",
    "password": "password",
    "database": "whatshooked"
  }
}

# 2. Run migrations
psql -U postgres -d whatshooked -f sql/postgres/001_init_schema.up.sql

# 3. Build and run
go build -o whatshooked examples/phase2_integration.go
./whatshooked

# 4. Test API
curl -X POST http://localhost:8080/api/v1/auth/login \
  -H "Content-Type: application/json" \
  -d '{"username":"admin","password":"admin123"}'
```

## Default Credentials

- **Username**: `admin`
- **Password**: `admin123`
- **Role**: `admin`

⚠️ Change default password after first login!

## Architecture

```
┌─────────────────────────────────────────────────────────────┐
│                     pkg/api/server.go                       │
│  - Uses ResolveSpec server.Manager                         │
│  - Auto-generates REST endpoints from BUN models           │
│  - Integrates security provider                            │
└─────────────────────────────────────────────────────────────┘
                              │
                              ▼
┌─────────────────────────────────────────────────────────────┐
│                   pkg/api/security.go                       │
│  - Implements security.SecurityProvider interface          │
│  - JWT authentication (Login, Logout, Authenticate)        │
│  - Row-level security (multi-tenancy)                      │
└─────────────────────────────────────────────────────────────┘
                              │
                              ▼
┌─────────────────────────────────────────────────────────────┐
│                  pkg/storage/repository.go                  │
│  - BUN ORM queries                                          │
│  - UserRepository, APIKeyRepository, etc.                   │
│  - Uses generated models from pkg/models/                   │
└─────────────────────────────────────────────────────────────┘
                              │
                              ▼
┌─────────────────────────────────────────────────────────────┐
│                     pkg/models/*.go                         │
│  - Generated by relspec from sql/schema.dbml                │
│  - ModelPublicUser, ModelPublicAPIKey, etc.                 │
│  - Uses resolvespec_common.SqlString, SqlTime types         │
└─────────────────────────────────────────────────────────────┘
```

## Next Phase: Frontend UI

**Status**: Ready to start

The backend is complete and provides all necessary API endpoints. Next steps:
1. Create React frontend application
2. Implement login/authentication UI
3. Build dashboard for managing hooks, accounts
4. Add WhatsApp account connection UI
5. Event log viewer
6. User management for admins

All backend APIs are ready to consume from the frontend.