media-db.js

/**
 * MediaDB: IndexedDB utility for storing large media Blobs
 * Used to share data between background and offscreen documents safely.
 */
const MediaDB = {
  DB_NAME: 'FluxonMediaDB',
  STORE_NAME: 'mediaBlobs',

  async _getDB() {
    return new Promise((resolve, reject) => {
      const request = indexedDB.open(this.DB_NAME, 1);
      request.onupgradeneeded = (e) => {
        const db = e.target.result;
        if (!db.objectStoreNames.contains(this.STORE_NAME)) {
          db.createObjectStore(this.STORE_NAME);
        }
      };
      request.onsuccess = (e) => resolve(e.target.result);
      request.onerror = (e) => reject(e.target.error);
    });
  },

  async saveBlob(key, blob) {
    const db = await this._getDB();
    return new Promise((resolve, reject) => {
      const transaction = db.transaction(this.STORE_NAME, 'readwrite');
      const store = transaction.objectStore(this.STORE_NAME);
      const request = store.put(blob, key);
      request.onsuccess = () => resolve();
      request.onerror = (e) => reject(e.target.error);
    });
  },

  async getBlob(key) {
    const db = await this._getDB();
    return new Promise((resolve, reject) => {
      const transaction = db.transaction(this.STORE_NAME, 'readonly');
      const store = transaction.objectStore(this.STORE_NAME);
      const request = store.get(key);
      request.onsuccess = (e) => resolve(e.target.result);
      request.onerror = (e) => reject(e.target.error);
    });
  },

  async deleteBlob(key) {
    const db = await this._getDB();
    return new Promise((resolve, reject) => {
      const transaction = db.transaction(this.STORE_NAME, 'readwrite');
      const store = transaction.objectStore(this.STORE_NAME);
      const request = store.delete(key);
      request.onsuccess = () => resolve();
      request.onerror = (e) => reject(e.target.error);
    });
  }
};

// Export for ES modules or background (importScripts)
if (typeof self !== 'undefined') {
  self.MediaDB = MediaDB;
}