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| 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 | /** * Offline Storage Service * * Uses IndexedDB to store data for offline access: * - Cart items that persist offline * - Cached products for browsing * - Pending actions to sync when back online */ import { openDB, DBSchema, IDBPDatabase } from 'idb'; // Database schema definition interface EliteEventsDB extends DBSchema { cart: { key: string; value: { productId: string; quantity: number; addedAt: number; }; }; products: { key: string; value: { id: string; name: string; price: number; image: string; cachedAt: number; }; indexes: { 'by-cached': number }; }; pendingActions: { key: number; value: { id?: number; type: PendingActionType; payload: unknown; timestamp: number; retries: number; }; }; viewedProducts: { key: string; value: { productId: string; viewedAt: number; }; }; } // Types export type PendingActionType = | 'ADD_TO_CART' | 'UPDATE_CART' | 'REMOVE_FROM_CART' | 'ADD_TO_WISHLIST' | 'REMOVE_FROM_WISHLIST' | 'SUBMIT_REVIEW' | 'UPDATE_PROFILE'; export interface OfflineCartItem { productId: string; quantity: number; addedAt: number; } export interface CachedProduct { id: string; name: string; price: number; image: string; cachedAt: number; } export interface PendingAction { id?: number; type: PendingActionType; payload: unknown; timestamp: number; retries: number; } // Database instance let db: IDBPDatabase<EliteEventsDB> | null = null; const DB_NAME = 'elite-events'; const DB_VERSION = 1; /** * Get or initialize the database connection */ export async function getDB(): Promise<IDBPDatabase<EliteEventsDB>> { if (db) return db; db = await openDB<EliteEventsDB>(DB_NAME, DB_VERSION, { upgrade(database) { // Cart store if (!database.objectStoreNames.contains('cart')) { database.createObjectStore('cart', { keyPath: 'productId' }); } // Products cache if (!database.objectStoreNames.contains('products')) { const productStore = database.createObjectStore('products', { keyPath: 'id', }); productStore.createIndex('by-cached', 'cachedAt'); } // Pending actions for sync if (!database.objectStoreNames.contains('pendingActions')) { database.createObjectStore('pendingActions', { keyPath: 'id', autoIncrement: true, }); } // Recently viewed products if (!database.objectStoreNames.contains('viewedProducts')) { database.createObjectStore('viewedProducts', { keyPath: 'productId', }); } }, }); return db; } /** * Close the database connection */ export async function closeDB(): Promise<void> { if (db) { db.close(); db = null; } } // ============================================ // Cart Operations // ============================================ /** * Save cart items to IndexedDB */ export async function saveCartOffline( items: Array<{ productId: string; quantity: number }> ): Promise<void> { const database = await getDB(); const tx = database.transaction('cart', 'readwrite'); await tx.store.clear(); for (const item of items) { await tx.store.put({ productId: item.productId, quantity: item.quantity, addedAt: Date.now(), }); } await tx.done; } /** * Get cart items from IndexedDB */ export async function getCartOffline(): Promise<OfflineCartItem[]> { const database = await getDB(); return database.getAll('cart'); } /** * Add a single item to offline cart */ export async function addToCartOffline( productId: string, quantity: number ): Promise<void> { const database = await getDB(); const existing = await database.get('cart', productId); await database.put('cart', { productId, quantity: existing ? existing.quantity + quantity : quantity, addedAt: Date.now(), }); } /** * Update cart item quantity offline */ export async function updateCartItemOffline( productId: string, quantity: number ): Promise<void> { const database = await getDB(); if (quantity <= 0) { await database.delete('cart', productId); } else { const existing = await database.get('cart', productId); if (existing) { await database.put('cart', { ...existing, quantity, }); } } } /** * Remove item from offline cart */ export async function removeFromCartOffline(productId: string): Promise<void> { const database = await getDB(); await database.delete('cart', productId); } /** * Clear offline cart */ export async function clearCartOffline(): Promise<void> { const database = await getDB(); await database.clear('cart'); } // ============================================ // Product Cache Operations // ============================================ /** * Cache products for offline browsing */ export async function cacheProducts( products: Array<{ id: string; name: string; price: number; images?: Array<{ url?: string; image?: string }>; }> ): Promise<void> { const database = await getDB(); const tx = database.transaction('products', 'readwrite'); for (const product of products) { const imageUrl = product.images?.[0]?.url || product.images?.[0]?.image || ''; await tx.store.put({ id: product.id, name: product.name, price: product.price, image: imageUrl, cachedAt: Date.now(), }); } await tx.done; } /** * Get cached products */ export async function getCachedProducts(): Promise<CachedProduct[]> { const database = await getDB(); return database.getAll('products'); } /** * Get a single cached product */ export async function getCachedProduct( id: string ): Promise<CachedProduct | undefined> { const database = await getDB(); return database.get('products', id); } /** * Clear old cached products (older than 7 days) */ export async function clearOldCachedProducts(): Promise<void> { const database = await getDB(); const sevenDaysAgo = Date.now() - 7 * 24 * 60 * 60 * 1000; const tx = database.transaction('products', 'readwrite'); const index = tx.store.index('by-cached'); let cursor = await index.openCursor(); while (cursor) { if (cursor.value.cachedAt < sevenDaysAgo) { await cursor.delete(); } cursor = await cursor.continue(); } await tx.done; } // ============================================ // Pending Actions Operations // ============================================ /** * Queue an action to be synced when online */ export async function queueAction( type: PendingActionType, payload: unknown ): Promise<void> { const database = await getDB(); await database.add('pendingActions', { type, payload, timestamp: Date.now(), retries: 0, }); } /** * Get all pending actions */ export async function getPendingActions(): Promise<PendingAction[]> { const database = await getDB(); return database.getAll('pendingActions'); } /** * Remove a pending action after successful sync */ export async function removePendingAction(id: number): Promise<void> { const database = await getDB(); await database.delete('pendingActions', id); } /** * Increment retry count for a failed action */ export async function incrementRetryCount(id: number): Promise<void> { const database = await getDB(); const action = await database.get('pendingActions', id); if (action) { await database.put('pendingActions', { ...action, retries: action.retries + 1, }); } } /** * Remove actions that have exceeded max retries */ export async function clearFailedActions(maxRetries: number = 5): Promise<void> { const database = await getDB(); const actions = await database.getAll('pendingActions'); const tx = database.transaction('pendingActions', 'readwrite'); for (const action of actions) { if (action.retries >= maxRetries && action.id !== undefined) { await tx.store.delete(action.id); } } await tx.done; } // ============================================ // Recently Viewed Products // ============================================ /** * Track a viewed product */ export async function trackViewedProduct(productId: string): Promise<void> { const database = await getDB(); await database.put('viewedProducts', { productId, viewedAt: Date.now(), }); } /** * Get recently viewed products (max 10) */ export async function getRecentlyViewed(): Promise<string[]> { const database = await getDB(); const viewed = await database.getAll('viewedProducts'); return viewed .sort((a, b) => b.viewedAt - a.viewedAt) .slice(0, 10) .map((v) => v.productId); } // ============================================ // Utility Functions // ============================================ /** * Check if IndexedDB is available */ export function isIndexedDBAvailable(): boolean { try { return typeof indexedDB !== 'undefined'; } catch { return false; } } /** * Get database storage estimate */ export async function getStorageEstimate(): Promise<{ used: number; available: number; } | null> { if (typeof navigator !== 'undefined' && 'storage' in navigator) { try { const estimate = await navigator.storage.estimate(); return { used: estimate.usage || 0, available: estimate.quota || 0, }; } catch { return null; } } return null; } |