🎵 Muzibu Offline Playback Sistemi

📁 Dosya Yapısı:

public/
├── sw.js                          # Service Worker (cache logic)
├── manifest.json                  # PWA manifest
└── js/
    └── sw-register.js             # SW registration script

resources/views/themes/muzibu/layouts/
└── app.blade.php                  # SW registration eklenecek

Modules/Muzibu/app/Services/
└── CacheService.php               # Backend cache management (yeni)

database/migrations/
└── muzibu_cache_analytics.php    # Cache analytics table (isteğe bağlı)

🗄️ IndexedDB Schema:

// Database: muzibu_cache
// Version: 1

// Object Store: songs
{
  song_id: number (keyPath),
  title: string,
  artist: string,
  album_id: number,
  cached_at: timestamp,
  expires_at: timestamp,
  size_bytes: number,
  segment_count: number
}

// Object Store: segments
{
  id: string (keyPath, format: "songId_segmentIndex"),
  song_id: number (index),
  segment_index: number,
  encrypted_blob: ArrayBuffer,
  cached_at: timestamp
}

// Object Store: keys
{
  song_id: number (keyPath),
  encryption_key: string (base64),
  iv: string (base64),
  cached_at: timestamp
}

⚙️ Service Worker Cache Stratejileri:

🔐 Web Crypto API Kullanımı:

// Encryption key generation (user + device specific)
const keyMaterial = await crypto.subtle.importKey(
  'raw',
  new TextEncoder().encode(userId + deviceId + salt),
  { name: 'PBKDF2' },
  false,
  ['deriveBits', 'deriveKey']
);

const encryptionKey = await crypto.subtle.deriveKey(
  { name: 'PBKDF2', salt: saltBuffer, iterations: 100000, hash: 'SHA-256' },
  keyMaterial,
  { name: 'AES-GCM', length: 256 },
  false,
  ['encrypt', 'decrypt']
);

// Segment encryption
const encryptedSegment = await crypto.subtle.encrypt(
  { name: 'AES-GCM', iv: ivBuffer },
  encryptionKey,
  segmentArrayBuffer
);

// Segment decryption (offline playback)
const decryptedSegment = await crypto.subtle.decrypt(
  { name: 'AES-GCM', iv: ivBuffer },
  encryptionKey,
  encryptedSegmentArrayBuffer
);

📊 İlgili Mevcut Dosyalar:

• Modules/Muzibu/app/Http/Controllers/Api/SongStreamController.php

  → stream(), serveKey() fonksiyonları

• Modules/Muzibu/app/Models/Song.php

  → encryption_key, encryption_iv fields

• public/themes/muzibu/js/player/core/player-core.js

  → HLS.js implementation (44KB, büyük dosya)

• App/Services/SignedUrlService.php

  → generateHlsUrl(), generateStreamUrl() (60 dk TTL)