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# 🔍 Complete System Audit: Radio Platform

**Date:** 2025-12-02  
**Scope:** Radio Station Licensing + Live Streaming Platform  
**Status:** Comprehensive Review

---

## 📋 Executive Summary

### ✅ **What's Working**
- Core database schema is well-designed
- API structure is RESTful and logical
- Live streaming features are implemented
- Business model integration is documented
- Admin management panel exists

### ⚠️ **Critical Issues**
1. **Missing `radio_stations` table** - Core table not created yet
2. **Foreign key constraints** - Some failing due to missing parent tables
3. **Transaction handling** - Fixed but needs monitoring
4. **Column size issues** - `call_sign` was too small (fixed)

### 🔧 **Areas Needing Improvement**
1. Error handling consistency
2. Security validation
3. API endpoint completeness
4. Dashboard feature gaps
5. Documentation gaps

---

## 🗄️ Database Schema Audit

### **Core Tables (Radio Station System)**

#### ✅ `radio_stations`
**Status:** Defined but may not exist  
**Issues:**
- ✅ `call_sign` size fixed (VARCHAR(10) → VARCHAR(50))
- ⚠️ Missing `stream_id` column (for live streaming integration)
- ✅ Good indexing on subscription_status, license_tier, api_key

**Fields:**
- Basic info: ✅ station_name, call_sign, station_type, license_tier
- Contact: ✅ contact_name, contact_email, contact_phone
- Location: ✅ city, state, country, timezone
- Subscription: ✅ subscription_status, monthly_play_limit, current_month_plays
- Billing: ✅ stripe_customer_id, stripe_subscription_id
- API: ✅ api_key, api_secret, api_enabled
- Metadata: ✅ created_at, updated_at, last_login, is_active

**Missing:**
- ❌ `stream_id` - Should link to `radio_streams.id` (for live streaming)

#### ✅ `radio_station_users`
**Status:** Defined  
**Purpose:** Multi-user support for stations  
**Issues:** None identified

#### ✅ `radio_playlists`
**Status:** Defined  
**Purpose:** Station playlists  
**Issues:** None identified

#### ✅ `radio_playlist_tracks`
**Status:** Defined  
**Purpose:** Junction table for tracks in playlists  
**Issues:** None identified

#### ✅ `radio_play_logs`
**Status:** Defined  
**Purpose:** Track play history  
**Issues:** None identified

#### ✅ `radio_licenses`
**Status:** Defined  
**Purpose:** Track licensing records  
**Issues:** None identified

#### ✅ `radio_royalties`
**Status:** Defined  
**Purpose:** Royalty calculations  
**Issues:** None identified

---

### **Live Streaming Tables**

#### ✅ `radio_streams`
**Status:** Created  
**Issues:**
- ⚠️ Foreign key to `radio_stations` fails (table doesn't exist)
- ✅ Good structure with indexes

**Fields:**
- ✅ station_id, stream_name, stream_url, stream_type
- ✅ is_live, current_track_id, listener_count
- ✅ started_at, last_update, metadata

**Missing:**
- ❌ No `ended_at` timestamp (only `started_at`)
- ❌ No `total_duration` tracking

#### ✅ `radio_now_playing`
**Status:** Created  
**Purpose:** Current track information  
**Issues:** None identified

#### ✅ `radio_votes`
**Status:** Created  
**Purpose:** Listener votes for tracks  
**Issues:**
- ⚠️ No duplicate vote prevention (same IP/user can vote multiple times)
- ⚠️ No vote expiration/cleanup mechanism

#### ✅ `radio_listeners`
**Status:** Created  
**Purpose:** Active listener tracking  
**Issues:**
- ⚠️ No cleanup for stale connections
- ⚠️ No heartbeat mechanism

#### ✅ `radio_stream_queue`
**Status:** Created  
**Purpose:** Upcoming tracks queue  
**Issues:** None identified

---

### **Database Relationships**

```
radio_stations (1) ──→ (N) radio_streams
radio_stations (1) ──→ (N) radio_playlists
radio_stations (1) ──→ (N) radio_station_users
radio_stations (1) ──→ (N) radio_play_logs
radio_stations (1) ──→ (N) radio_licenses

radio_streams (1) ──→ (N) radio_now_playing
radio_streams (1) ──→ (N) radio_votes
radio_streams (1) ──→ (N) radio_listeners
radio_streams (1) ──→ (N) radio_stream_queue

music_tracks (1) ──→ (N) radio_play_logs
music_tracks (1) ──→ (N) radio_now_playing
music_tracks (1) ──→ (N) radio_votes
music_tracks (1) ──→ (N) radio_stream_queue
```

**Issues:**
- ⚠️ Foreign keys fail if parent tables don't exist
- ✅ Relationships are logical and well-designed

---

## 🔌 API Endpoints Audit

### **Radio Station API v1** (`/radio/api/v1/`)

#### ✅ Catalog Endpoints
- `GET /catalog/tracks` - ✅ Implemented
- `GET /catalog/tracks/{id}` - ✅ Implemented

#### ✅ Play Logging
- `POST /plays` - ✅ Implemented
- `GET /plays` - ✅ Implemented

#### ✅ Playlist Management
- `GET /playlists` - ✅ Implemented
- `POST /playlists` - ✅ Implemented
- `GET /playlists/{id}/tracks` - ✅ Implemented
- `POST /playlists/{id}/tracks` - ✅ Implemented

#### ✅ Analytics
- `GET /analytics/overview` - ✅ Implemented

#### ✅ Station Info
- `GET /station` - ✅ Implemented

#### ✅ Live Streaming Endpoints
- `POST /stream/start` - ✅ Implemented
- `POST /stream/stop` - ✅ Implemented
- `POST /stream/now_playing` - ✅ Implemented
- `GET /stream/status` - ✅ Implemented
- `GET /stream/queue` - ✅ Implemented

**Missing Endpoints:**
- ❌ `PUT /playlists/{id}` - Update playlist
- ❌ `DELETE /playlists/{id}` - Delete playlist
- ❌ `DELETE /playlists/{id}/tracks/{track_id}` - Remove track from playlist
- ❌ `GET /analytics/tracks` - Track-specific analytics
- ❌ `GET /analytics/time` - Time-based analytics
- ❌ `POST /stream/queue/add` - Add track to queue
- ❌ `DELETE /stream/queue/{id}` - Remove from queue
- ❌ `PUT /stream/queue/reorder` - Reorder queue

---

### **Public Live API** (`/radio/api/live/`)

#### ✅ Stream Status
- `GET /stream.php` - ✅ Implemented

#### ✅ Voting
- `POST /vote.php` - ✅ Implemented

#### ✅ Listener Tracking
- `POST /listener.php` - ✅ Implemented

#### ✅ Now Playing
- `GET /now_playing.php` - ✅ Implemented

**Issues:**
- ⚠️ No rate limiting on voting
- ⚠️ No authentication for public endpoints (could be abused)
- ⚠️ No CORS restrictions

---

## 👥 User Flows Audit

### **1. Station Registration Flow**

**Path:** `/radio/register.php` → `/radio/subscribe.php` → `/radio/subscription_success.php`

**Steps:**
1. ✅ User fills registration form
2. ✅ System creates `radio_stations` record
3. ✅ Generates API credentials
4. ✅ Redirects to subscription page
5. ✅ After payment, updates subscription_status

**Issues:**
- ⚠️ No email verification
- ⚠️ No password setup (uses API secret as password)
- ⚠️ No email confirmation sent
- ⚠️ No welcome email

**Missing:**
- ❌ Email verification step
- ❌ Password reset functionality
- ❌ Account activation workflow

---

### **2. Station Login Flow**

**Path:** `/radio/login.php` → `/radio/dashboard/`

**Steps:**
1. ✅ User enters email/password
2. ✅ System authenticates against `radio_stations`
3. ✅ Sets session variables
4. ✅ Redirects to dashboard

**Issues:**
- ⚠️ Uses API secret as password (not secure)
- ⚠️ No "Remember Me" functionality
- ⚠️ No 2FA support
- ⚠️ No login attempt limiting

**Missing:**
- ❌ Proper password system
- ❌ Password reset
- ❌ Account lockout after failed attempts
- ❌ Session management

---

### **3. Station Dashboard Flow**

**Path:** `/radio/dashboard/index.php`

**Features:**
- ✅ Basic dashboard exists
- ✅ Live stream management (`/radio/dashboard/live_stream.php`)

**Missing:**
- ❌ Playlist management UI
- ❌ Analytics dashboard
- ❌ Track catalog browser
- ❌ Settings page
- ❌ API key management
- ❌ Subscription management
- ❌ User management (for multi-user stations)

---

### **4. Live Streaming Flow**

**Station Side:**
1. ✅ Station logs into dashboard
2. ✅ Clicks "Start Stream"
3. ✅ API creates `radio_streams` record
4. ✅ Station plays tracks via API
5. ✅ System updates `radio_now_playing`

**Listener Side:**
1. ✅ Listener visits `/radio/live.php`
2. ✅ System finds active streams
3. ✅ Displays now playing info
4. ✅ Listener can vote
5. ✅ Real-time updates via SSE

**Issues:**
- ⚠️ No actual audio streaming (just metadata)
- ⚠️ No audio player integration
- ⚠️ No stream URL validation
- ⚠️ No stream quality options

---

### **5. Admin Management Flow**

**Path:** `/admin.php?tab=radio-live`

**Features:**
- ✅ View all streams
- ✅ Start/stop streams
- ✅ View statistics
- ✅ Clear votes
- ✅ Delete streams

**Missing:**
- ❌ Station management
- ❌ User management
- ❌ Subscription management
- ❌ Analytics overview
- ❌ System health monitoring

---

## 🔒 Security Audit

### **Authentication & Authorization**

**Issues:**
- ⚠️ API authentication uses Bearer token (good)
- ⚠️ But API secret is stored as password hash (inconsistent)
- ⚠️ No rate limiting on API endpoints
- ⚠️ No IP whitelisting option
- ⚠️ Public endpoints have no authentication
- ⚠️ No CSRF protection on forms
- ⚠️ No input sanitization validation
- ⚠️ SQL injection risk (using prepared statements ✅, but need to verify all queries)

**Recommendations:**
1. Implement proper password system for stations
2. Add rate limiting to all API endpoints
3. Add CSRF tokens to forms
4. Validate all inputs
5. Add IP whitelisting for API
6. Implement API key rotation

---

### **Data Protection**

**Issues:**
- ⚠️ API secrets stored as password hashes (good)
- ⚠️ But no encryption at rest
- ⚠️ No PII data protection
- ⚠️ No GDPR compliance measures
- ⚠️ No data retention policies

---

## 💼 Business Model Integration Audit

### **Revenue Streams**

**Current:**
1. ✅ Station subscriptions ($99-$999/month)
2. ✅ Royalty split (70/30)

**Potential:**
1. ⚠️ Live streaming premium (not implemented)
2. ⚠️ Listener premium (not implemented)
3. ⚠️ Advertising (not implemented)
4. ⚠️ White-label (not implemented)

### **Subscription Tiers**

**Defined:**
- ✅ Local: $99/month, 500 plays
- ✅ Regional: $299/month, 2,000 plays
- ✅ National: $999/month, unlimited
- ✅ Enterprise: Custom pricing

**Issues:**
- ⚠️ No enforcement of play limits
- ⚠️ No automatic subscription renewal
- ⚠️ No subscription upgrade/downgrade flow
- ⚠️ No prorated billing

---

## 📊 Data Flow Audit

### **Play Logging Flow**

```
Station API Call
    ↓
authenticateRadioAPI()
    ↓
logRadioPlay()
    ↓
INSERT radio_play_logs
    ↓
UPDATE radio_stations (increment play count)
    ↓
UPDATE music_tracks (increment play count)
    ↓
ensureRadioLicense()
    ↓
calculateRadioRoyalty()
    ↓
INSERT radio_royalties
```

**Issues:**
- ⚠️ No duplicate play detection
- ⚠️ No rate limiting
- ⚠️ No validation of play limits
- ⚠️ No error handling for failed royalty calculation

---

### **Live Streaming Flow**

```
Station Dashboard
    ↓
POST /api/v1/stream/start
    ↓
INSERT radio_streams (is_live = TRUE)
    ↓
Station plays track
    ↓
POST /api/v1/stream/now_playing
    ↓
UPDATE radio_now_playing
    ↓
Public Player (SSE)
    ↓
GET /api/live/now_playing.php
    ↓
Display to listeners
```

**Issues:**
- ⚠️ No validation that station has active subscription
- ⚠️ No check for play limits
- ⚠️ No stream URL validation
- ⚠️ No audio playback (just metadata)

---

## 🐛 Known Issues & Bugs

### **Critical**
1. ❌ `radio_stations` table doesn't exist (migration not run)
2. ❌ Foreign key constraints failing
3. ❌ Transaction errors in migration

### **High Priority**
1. ⚠️ No password system for stations (uses API secret)
2. ⚠️ No play limit enforcement
3. ⚠️ No duplicate vote prevention
4. ⚠️ No rate limiting

### **Medium Priority**
1. ⚠️ Missing dashboard features
2. ⚠️ No email notifications
3. ⚠️ No analytics UI
4. ⚠️ No playlist management UI

### **Low Priority**
1. ⚠️ No audio player integration
2. ⚠️ No mobile optimization
3. ⚠️ No internationalization
4. ⚠️ No accessibility features

---

## 📝 Missing Features

### **Core Features**
- ❌ Email verification
- ❌ Password reset
- ❌ Account activation
- ❌ Multi-user station management
- ❌ Playlist management UI
- ❌ Analytics dashboard
- ❌ Settings page
- ❌ API key management

### **Live Streaming Features**
- ❌ Actual audio streaming
- ❌ Stream quality options
- ❌ Stream recording
- ❌ Stream scheduling
- ❌ Multi-stream support
- ❌ Stream analytics

### **Business Features**
- ❌ Subscription management UI
- ❌ Billing portal
- ❌ Invoice generation
- ❌ Payment history
- ❌ Subscription upgrade/downgrade
- ❌ Prorated billing

### **Admin Features**
- ❌ Station management
- ❌ User management
- ❌ System health monitoring
- ❌ Error logging dashboard
- ❌ Performance metrics

---

## ✅ Recommendations

### **Immediate (Week 1)**
1. ✅ Run `radio_stations` migration
2. ✅ Fix foreign key constraints
3. ✅ Add proper password system
4. ✅ Add play limit enforcement
5. ✅ Add duplicate vote prevention

### **Short Term (Month 1)**
1. Add email verification
2. Add password reset
3. Add rate limiting
4. Add CSRF protection
5. Add input validation
6. Build playlist management UI
7. Build analytics dashboard

### **Medium Term (Month 2-3)**
1. Add subscription management
2. Add billing portal
3. Add multi-user support
4. Add email notifications
5. Add API key rotation
6. Add stream recording
7. Add mobile optimization

### **Long Term (Month 4-6)**
1. Add actual audio streaming
2. Add premium features
3. Add advertising system
4. Add white-label options
5. Add internationalization
6. Add advanced analytics

---

## 📈 Success Metrics

### **Technical Metrics**
- API response time: < 200ms
- Database query time: < 50ms
- Uptime: > 99.9%
- Error rate: < 0.1%

### **Business Metrics**
- Station registration rate
- Subscription conversion rate
- Play limit usage
- Live stream adoption rate
- Listener engagement

### **User Metrics**
- Dashboard usage
- API usage
- Feature adoption
- Error rates
- Support tickets

---

## 🎯 Conclusion

### **Strengths**
- ✅ Well-designed database schema
- ✅ Logical API structure
- ✅ Good business model integration
- ✅ Live streaming features implemented
- ✅ Admin panel exists

### **Weaknesses**
- ⚠️ Missing core table (`radio_stations`)
- ⚠️ Incomplete user flows
- ⚠️ Security gaps
- ⚠️ Missing features
- ⚠️ No audio streaming

### **Overall Assessment**
**Status:** 🟡 **Functional but Incomplete**

The system has a solid foundation but needs:
1. Core table creation
2. Security hardening
3. Feature completion
4. User experience improvements

**Priority:** Fix critical issues first, then build out missing features.

---

**Next Steps:**
1. Run migrations to create all tables
2. Fix foreign key constraints
3. Implement password system
4. Add security measures
5. Build missing UI components