offline.ts
| 1 | import type { |
| 2 | MediaFile, |
| 3 | Directory, |
| 4 | FileListing, |
| 5 | FileListingWithStatus, |
| 6 | DirectoryWithStatus, |
| 7 | } from "music-server-shared/types"; |
| 8 | import { parseMap } from "music-server-shared/mapconversion"; |
| 9 | import type { AppOptions, Playlist, PlaylistItem } from "./types"; |
| 10 | import { joinPath, toast } from "./utils"; |
| 11 | import type { Accessor, ResourceActions } from "solid-js"; |
| 12 | import { createStore } from "solid-js/store"; |
| 13 | import { AsyncSemaphore } from "./semaphore"; |
| 14 | |
| 15 | interface Progress { |
| 16 | bytes: number; |
| 17 | } |
| 18 | |
| 19 | export type DownloadStatus = Progress | "DirectoryProgress" | "Synced" | undefined; |
| 20 | //used to display download status for directories/files in the filebrowser view |
| 21 | export const [downloadStatusMap, setDownloadStatusMap] = createStore<Record<string, DownloadStatus>>({}); |
| 22 | |
| 23 | //initialize filetrees and download statuses from indexedDB |
| 24 | export async function loadDataFromDB() { |
| 25 | try { |
| 26 | const db = await openDB(); |
| 27 | const files = await db.listFiles(FileStore); |
| 28 | for (const file of files) { |
| 29 | setDownloadStatusMap(file.path, "Synced"); |
| 30 | updateFileTree(file.path, { metadata: file.metadata }, true); |
| 31 | } |
| 32 | } catch (e) { |
| 33 | toast("Loading offline files failed", "error", e); |
| 34 | console.error(e); |
| 35 | } |
| 36 | } |
| 37 | |
| 38 | //contains all locally synced files |
| 39 | const offlineTreeRoot: Directory = { |
| 40 | files: new Map(), |
| 41 | }; |
| 42 | //used for caching online file listings |
| 43 | const onlineTreeRoot: DirectoryWithStatus = { |
| 44 | files: new Map(), |
| 45 | status: "Unknown", |
| 46 | }; |
| 47 | |
| 48 | //merges "Scanned" directories from "other" to "target" |
| 49 | function mergeTrees(target: DirectoryWithStatus, other: DirectoryWithStatus) { |
| 50 | if (other.status === "Unknown") return; |
| 51 | target.status = other.status; |
| 52 | for (const [fileName, file] of other.files.entries()) { |
| 53 | const targetFile = target.files.get(fileName); |
| 54 | if (targetFile && "files" in targetFile && "files" in file) { |
| 55 | mergeTrees(targetFile, file); |
| 56 | } else { |
| 57 | target.files.set(fileName, file); |
| 58 | } |
| 59 | } |
| 60 | } |
| 61 | |
| 62 | //TODO: improve typing to avoid "as" |
| 63 | //overloads for typecheking |
| 64 | //offline tree only stores files, directories are created ad-hoc |
| 65 | function updateFileTree(path: string, file: MediaFile, offline: true): void; |
| 66 | //online tree only stores cached directory listings |
| 67 | function updateFileTree(path: string, file: DirectoryWithStatus, offline: false): void; |
| 68 | // Updates file tree structure with new data (offline or online) |
| 69 | function updateFileTree(path: string, file: DirectoryWithStatus | MediaFile, offline: boolean) { |
| 70 | if (offline && path === "") throw new Error("Trying to update root in offline mode"); |
| 71 | const basePath = path.split("/").slice(0, -1).join("/"); |
| 72 | const fileName = path.split("/").toReversed()[0]; |
| 73 | const node = getDirInTree(basePath, true, offline); |
| 74 | |
| 75 | if (offline) { |
| 76 | node.files.set(fileName, file); |
| 77 | } else { |
| 78 | if (path === "") mergeTrees(node as DirectoryWithStatus, file as DirectoryWithStatus); |
| 79 | else { |
| 80 | let target = node.files.get(fileName) as DirectoryWithStatus; |
| 81 | if (!target) target = { files: new Map(), status: "Unknown" }; |
| 82 | mergeTrees(target as DirectoryWithStatus, file as DirectoryWithStatus); |
| 83 | node.files.set(fileName, target); |
| 84 | } |
| 85 | } |
| 86 | } |
| 87 | |
| 88 | //overloads for typecheking |
| 89 | function getDirInTree(path: string, create: true, offline: true): Directory; |
| 90 | function getDirInTree(path: string, create: true, offline: false): DirectoryWithStatus; |
| 91 | function getDirInTree(path: string, create: false, offline: true): Directory | null; |
| 92 | function getDirInTree(path: string, create: false, offline: false): DirectoryWithStatus | null; |
| 93 | function getDirInTree(path: string, create: true, offline: boolean): DirectoryWithStatus | Directory; |
| 94 | function getDirInTree(path: string, create: false, offline: boolean): DirectoryWithStatus | Directory | null; |
| 95 | // get a DirectoryNode from the directory tree matching the path, and optionally creating missing nodes it if they don't exist yet |
| 96 | function getDirInTree(path: string, create: boolean, offline: boolean): DirectoryWithStatus | Directory | null { |
| 97 | let current = offline ? offlineTreeRoot : onlineTreeRoot; |
| 98 | if (path === "") return current; |
| 99 | const parts = path.split("/"); |
| 100 | |
| 101 | for (const part of parts) { |
| 102 | let next: DirectoryWithStatus | Directory | MediaFile | undefined = current.files.get(part); |
| 103 | if (!next || "metadata" in next) { |
| 104 | if (!create) return null; |
| 105 | //if mediafile already exists, we overwrite it with a directory anyway |
| 106 | if (offline) next = { files: new Map() }; |
| 107 | else next = { files: new Map(), status: "Unknown" }; |
| 108 | current.files.set(part, next); |
| 109 | } |
| 110 | current = next; |
| 111 | } |
| 112 | return current; |
| 113 | } |
| 114 | |
| 115 | function deleteOfflinePath(path: string): void { |
| 116 | const basePath = path.split("/").slice(0, -1).join("/"); |
| 117 | const fileName = path.split("/").toReversed()[0]; |
| 118 | |
| 119 | const node = getDirInTree(basePath, false, true); |
| 120 | if (!node) return; |
| 121 | |
| 122 | node.files.delete(fileName); |
| 123 | if (node.files.size === 0) deleteOfflinePath(basePath); |
| 124 | } |
| 125 | |
| 126 | export const clearDirectoryCache = (path: string) => { |
| 127 | const node = getDirInTree(path, false, false); |
| 128 | if (!node) return; |
| 129 | node.files.clear(); |
| 130 | node.status = "Unknown"; |
| 131 | }; |
| 132 | |
| 133 | async function listOnlineFiles(dir: string, recursive: boolean): Promise<FileListingWithStatus | undefined> { |
| 134 | const response = await fetch(`/list/${dir}?recursive=${recursive}`).catch(() => {}); |
| 135 | if (response?.status === 404) { |
| 136 | toast(`Directory not found: ${dir}`, "error"); |
| 137 | return; |
| 138 | } |
| 139 | if (!response || !response.ok) { |
| 140 | toast( |
| 141 | `Fetching files for ${dir === "" ? "root" : dir} failed${response ? `: ${response.statusText}` : ""}`, |
| 142 | "error", |
| 143 | ); |
| 144 | return; |
| 145 | } |
| 146 | |
| 147 | return parseMap(await response.text()) as FileListingWithStatus; |
| 148 | } |
| 149 | |
| 150 | function listOfflineFiles(dir: string): FileListing { |
| 151 | const node = getDirInTree(dir, false, true); |
| 152 | if (!node || !node.files) return new Map(); |
| 153 | return node.files; |
| 154 | } |
| 155 | |
| 156 | //checks if this Directory is completely scanned, i.e. suitable for a recursive listing result |
| 157 | function fullyKnown(dir: DirectoryWithStatus) { |
| 158 | if (dir.status === "Unknown") { |
| 159 | return false; |
| 160 | } |
| 161 | if (dir.files.values().some((value) => "files" in value && !fullyKnown(value))) { |
| 162 | return false; |
| 163 | } |
| 164 | return true; |
| 165 | } |
| 166 | |
| 167 | //non-recursive listing should not include nested children |
| 168 | function pruneChildren(listing: FileListing) { |
| 169 | const cloned = structuredClone(listing); |
| 170 | for (const [, item] of cloned.entries()) { |
| 171 | if ("files" in item) item.files.clear(); |
| 172 | } |
| 173 | return cloned; |
| 174 | } |
| 175 | |
| 176 | //used for combining the online and offline results, to be able to show files that only exist locally |
| 177 | function combineFileListings(listing1: FileListing, listing2: FileListing): FileListing { |
| 178 | const result = new Map(listing1); |
| 179 | |
| 180 | for (const [key, value2] of listing2.entries()) { |
| 181 | const value1 = result.get(key); |
| 182 | |
| 183 | if (value1 && "files" in value1 && "files" in value2) { |
| 184 | result.set(key, { files: combineFileListings(value1.files, value2.files) }); |
| 185 | } else { |
| 186 | result.set(key, value2); |
| 187 | } |
| 188 | } |
| 189 | |
| 190 | return result; |
| 191 | } |
| 192 | |
| 193 | // File listing logic with hybrid online/offline support |
| 194 | // Combines: |
| 195 | // 1. Direct IndexedDB lookups for offline mode |
| 196 | // 2. Cached online listings |
| 197 | // 3. Merged online+offline results |
| 198 | export async function listFiles(dir: string, offline: boolean, recursive: boolean): Promise<FileListing> { |
| 199 | if (offline) { |
| 200 | const files = listOfflineFiles(dir); |
| 201 | return recursive ? files : pruneChildren(files); |
| 202 | } |
| 203 | const cached = getDirInTree(dir, false, false); |
| 204 | if (cached !== null && cached.status === "Scanned" && (!recursive || fullyKnown(cached))) { |
| 205 | const combined = combineFileListings(cached.files, listOfflineFiles(dir)); |
| 206 | return recursive ? combined : pruneChildren(combined); |
| 207 | } |
| 208 | const files = await listOnlineFiles(dir, recursive); |
| 209 | if (!files) return new Map(); |
| 210 | updateFileTree(dir, { files, status: "Scanned" }, false); |
| 211 | const combined = combineFileListings(files, listOfflineFiles(dir)); |
| 212 | return recursive ? combined : pruneChildren(combined); |
| 213 | } |
| 214 | |
| 215 | //get cover art for a directory with cache-first strategy |
| 216 | export async function getCover(dir: string, offline: boolean) { |
| 217 | const db = await openDB(); |
| 218 | const dbResult = await db.get(CoverStore, dir); |
| 219 | if (dbResult !== undefined) { |
| 220 | const cached = dbResult as StoredCover; |
| 221 | return cached.data === null ? undefined : URL.createObjectURL(new Blob([cached.data])); |
| 222 | } |
| 223 | |
| 224 | if (offline) return undefined; |
| 225 | |
| 226 | const response = await fetch(`/cover/${dir}`, { method: "GET" }).catch(() => {}); |
| 227 | if (!response || response.status === 404) { |
| 228 | db.put(CoverStore, { path: dir, data: null }); |
| 229 | return undefined; |
| 230 | } |
| 231 | const blob = await response.blob(); |
| 232 | db.put(CoverStore, { path: dir, data: blob }); |
| 233 | return URL.createObjectURL(blob); |
| 234 | } |
| 235 | |
| 236 | export const clearCoverCache = async (path: string) => { |
| 237 | const db = await openDB(); |
| 238 | return db.delete(CoverStore, path); |
| 239 | }; |
| 240 | |
| 241 | //returns an object url to the blob if synced, otherwise the server url |
| 242 | export async function getSrc(path: string, options: AppOptions, offline: boolean) { |
| 243 | const db = await openDB(); |
| 244 | const dbResult = (await db.get(FileStore, path)) as StoredFile; |
| 245 | if (dbResult) return URL.createObjectURL(dbResult.data); |
| 246 | |
| 247 | if (offline) { |
| 248 | toast("This file is not cached, leave offline mode to play it", "error"); |
| 249 | return undefined; |
| 250 | } |
| 251 | if (options.enableTranscoding) { |
| 252 | return `${joinPath("/transcode", path)}?bitrate=${options.bitrate}&format=${options.format}&disableChunkedTranscoding=${options.disableChunkedTranscoding}`; |
| 253 | } |
| 254 | return joinPath("/download", path); |
| 255 | } |
| 256 | |
| 257 | export async function loadPlaylists() { |
| 258 | const db = await openDB(); |
| 259 | return await db.listPlaylists(PlaylistStore); |
| 260 | } |
| 261 | |
| 262 | //save playlist to indexedDB, throws error if playlist with that name already exists and overwrite=false |
| 263 | export async function savePlaylist(playlist: Playlist, overwrite: boolean) { |
| 264 | const db = await openDB(); |
| 265 | playlist.items = playlist.items.map((item) => { |
| 266 | //some less space in the db by omitting ids |
| 267 | const { id, ...itemWithoutId } = item as PlaylistItem; |
| 268 | return itemWithoutId; |
| 269 | }); |
| 270 | if (overwrite) await db.put(PlaylistStore, playlist); |
| 271 | else await db.add(PlaylistStore, playlist); |
| 272 | } |
| 273 | |
| 274 | export async function deletePlaylist(name: string) { |
| 275 | const db = await openDB(); |
| 276 | await db.delete(PlaylistStore, name); |
| 277 | } |
| 278 | |
| 279 | //deletes file or directory(+recursive contents) from indexedDB and updates their download statuses |
| 280 | export async function deleteFile( |
| 281 | fileName: string, |
| 282 | item: MediaFile | Directory, |
| 283 | basePath: string, |
| 284 | fetchFiles: ResourceActions<FileListing>, |
| 285 | ) { |
| 286 | const fullPath = joinPath(basePath, fileName); |
| 287 | if ("metadata" in item && !downloadStatusMap[fullPath]) return; |
| 288 | |
| 289 | if (!("metadata" in item)) { |
| 290 | const newBasePath = joinPath(basePath, fileName); |
| 291 | const result = listOfflineFiles(newBasePath); |
| 292 | for (const [childName, childItem] of result) { |
| 293 | await deleteFile(childName, childItem, newBasePath, fetchFiles); |
| 294 | } |
| 295 | } |
| 296 | |
| 297 | deleteOfflinePath(fullPath); |
| 298 | const db = await openDB(); |
| 299 | await db.delete(FileStore, fullPath); |
| 300 | setDownloadStatusMap(fullPath, undefined); |
| 301 | fetchFiles.refetch(); |
| 302 | } |
| 303 | |
| 304 | const downloadSemaphore = new AsyncSemaphore(1); |
| 305 | |
| 306 | //Download file to indexedDB and updates the offline file tree |
| 307 | //concurrency control via the downloadSemaphore |
| 308 | async function downloadFile( |
| 309 | path: string, |
| 310 | currentDir: Accessor<string>, |
| 311 | options: AppOptions, |
| 312 | item: MediaFile, |
| 313 | fetchFiles: ResourceActions<FileListing>, |
| 314 | ): Promise<void> { |
| 315 | const initialProgress = downloadStatusMap[path]; |
| 316 | if (typeof initialProgress === "object" && "bytes" in initialProgress) return; // download already in progress |
| 317 | |
| 318 | try { |
| 319 | setDownloadStatusMap(path, { bytes: 0 }); |
| 320 | const db = await openDB(); |
| 321 | let mimeType: string | undefined; |
| 322 | |
| 323 | //options might change at any point, update the semaphore to the current value |
| 324 | downloadSemaphore.setMaxConcurrency(options.enableTranscoding ? options.maxTranscodes : options.maxDownloads); |
| 325 | let blob: Blob; |
| 326 | try { |
| 327 | //make sure to only allow the set amount of parallel downloads |
| 328 | await downloadSemaphore.acquire(); |
| 329 | let res: Response; |
| 330 | if (options.enableTranscoding) { |
| 331 | res = await fetch( |
| 332 | `${joinPath("/transcode", path)}?bitrate=${options.bitrate}&format=${options.format}&disableChunkedTranscoding=${options.disableChunkedTranscoding}`, |
| 333 | ); |
| 334 | } else { |
| 335 | res = await fetch(joinPath("/download", path)); |
| 336 | } |
| 337 | //let the browser do the actual download |
| 338 | const blobPromise = res.clone().blob(); |
| 339 | if (!res.ok || !res.body) throw res.statusText; |
| 340 | //we just iterate over the chunks to get the current progress |
| 341 | const reader = res.body.getReader(); |
| 342 | mimeType = res.headers.get("content-type") ?? undefined; |
| 343 | let received = 0; |
| 344 | |
| 345 | let lastUpdate = 0; |
| 346 | while (true) { |
| 347 | const { done, value } = await reader.read(); |
| 348 | if (done) break; |
| 349 | received += value.length; |
| 350 | |
| 351 | //debouncing logic to not update UI too fast |
| 352 | const now = Date.now(); |
| 353 | if (now - lastUpdate < 250) continue; |
| 354 | lastUpdate = now; |
| 355 | setDownloadStatusMap(path, { bytes: received }); |
| 356 | } |
| 357 | blob = await blobPromise; |
| 358 | } finally { |
| 359 | downloadSemaphore.release(); |
| 360 | } |
| 361 | |
| 362 | await db.put(FileStore, { |
| 363 | path, |
| 364 | data: blob, |
| 365 | metadata: item.metadata, |
| 366 | } as StoredFile); |
| 367 | updateFileTree(path, item, true); |
| 368 | setDownloadStatusMap(path, "Synced"); |
| 369 | const basePath = path.split("/").slice(0, -1).join("/"); |
| 370 | const fileName = path.split("/").toReversed()[0]; |
| 371 | //add files to listing if the containing directory is currently shown |
| 372 | if (currentDir() === basePath) { |
| 373 | //directly mutate files to not cause unnecessary rerenders |
| 374 | fetchFiles.mutate((prev) => { |
| 375 | prev.set(fileName, item); |
| 376 | //new map to force rerender |
| 377 | return new Map(prev); |
| 378 | }); |
| 379 | } |
| 380 | } catch (e) { |
| 381 | toast(`Downloading ${path} failed`, "error", e); |
| 382 | //restore original status |
| 383 | setDownloadStatusMap(path, initialProgress === "Synced" ? "Synced" : undefined); |
| 384 | } |
| 385 | } |
| 386 | |
| 387 | export async function download( |
| 388 | fileName: string, |
| 389 | item: MediaFile | Directory, |
| 390 | basePath: string, |
| 391 | currentDir: Accessor<string>, |
| 392 | options: AppOptions, |
| 393 | fetchFiles: ResourceActions<FileListing>, |
| 394 | ) { |
| 395 | const fullPath = joinPath(basePath, fileName); |
| 396 | if ("metadata" in item) { |
| 397 | await downloadFile(fullPath, currentDir, options, item, fetchFiles); |
| 398 | } else { |
| 399 | setDownloadStatusMap(fullPath, "DirectoryProgress"); |
| 400 | await getCover(fullPath, false); |
| 401 | try { |
| 402 | //start downloads for all children to allow them to run in parallel, then wait for the results |
| 403 | const promises: Promise<unknown>[] = []; |
| 404 | for (const [childName, childItem] of await listFiles(fullPath, false, false)) { |
| 405 | promises.push(download(childName, childItem, fullPath, currentDir, options, fetchFiles)); |
| 406 | } |
| 407 | await Promise.allSettled(promises); |
| 408 | } finally { |
| 409 | //always set to undefined afterwards to show the normal sync icon, since we don't know for sure if the directory is completely synced |
| 410 | setDownloadStatusMap(fullPath, undefined); |
| 411 | } |
| 412 | } |
| 413 | } |
| 414 | |
| 415 | export async function isFileSynced(path: string, status: DownloadStatus | undefined): Promise<boolean> { |
| 416 | if (status === "Synced") return true; |
| 417 | //if in progress, it might already exist anyway and just is being re-synced right now |
| 418 | if (typeof status === "object" && "bytes" in status) { |
| 419 | const db = await openDB(); |
| 420 | return await db.exist(FileStore, path); |
| 421 | } |
| 422 | return false; |
| 423 | } |
| 424 | |
| 425 | interface StoredFile { |
| 426 | path: string; |
| 427 | data: Blob; |
| 428 | metadata: { |
| 429 | duration: number; |
| 430 | }; |
| 431 | } |
| 432 | |
| 433 | interface StoredCover { |
| 434 | path: string; |
| 435 | data: Blob | null; |
| 436 | } |
| 437 | |
| 438 | const FileStore = "fileblobs"; |
| 439 | const CoverStore = "covers"; |
| 440 | const PlaylistStore = "playlists"; |
| 441 | |
| 442 | async function openDB() { |
| 443 | return new Promise<DatabaseWrapper>((resolve, reject) => { |
| 444 | const req = indexedDB.open("music-files"); |
| 445 | req.onerror = () => reject(req.error); |
| 446 | req.onupgradeneeded = () => { |
| 447 | const db = req.result; |
| 448 | if (!db.objectStoreNames.contains(FileStore)) db.createObjectStore(FileStore, { keyPath: "path" }); |
| 449 | if (!db.objectStoreNames.contains(CoverStore)) db.createObjectStore(CoverStore, { keyPath: "path" }); |
| 450 | if (!db.objectStoreNames.contains(PlaylistStore)) db.createObjectStore(PlaylistStore, { keyPath: "name" }); |
| 451 | }; |
| 452 | req.onsuccess = () => resolve(wrapDB(req.result)); |
| 453 | }); |
| 454 | } |
| 455 | |
| 456 | interface DatabaseWrapper { |
| 457 | get(store: typeof CoverStore | typeof FileStore, key: string): Promise<unknown>; |
| 458 | put(store: typeof FileStore, value: StoredFile): Promise<void>; |
| 459 | put(store: typeof CoverStore, value: StoredCover): Promise<void>; |
| 460 | put(store: typeof PlaylistStore, value: Playlist): Promise<void>; |
| 461 | add(store: typeof PlaylistStore, value: Playlist): Promise<void>; |
| 462 | delete(store: typeof FileStore | typeof CoverStore | typeof PlaylistStore, key: string): Promise<void>; |
| 463 | clear(store: string): Promise<void>; |
| 464 | listFiles(store: typeof FileStore): Promise<StoredFile[]>; |
| 465 | listPlaylists(store: typeof PlaylistStore): Promise<Playlist[]>; |
| 466 | exist(store: typeof FileStore, key: string): Promise<boolean>; |
| 467 | } |
| 468 | |
| 469 | function wrapDB(db: IDBDatabase): DatabaseWrapper { |
| 470 | return { |
| 471 | get: (store: string, key: string) => |
| 472 | new Promise((res, rej) => { |
| 473 | const tx = db.transaction(store, "readonly"); |
| 474 | const req = tx.objectStore(store).get(key); |
| 475 | req.onsuccess = () => res(req.result); |
| 476 | req.onerror = () => rej(req.error); |
| 477 | }), |
| 478 | put: (store: string, value: unknown) => |
| 479 | new Promise<void>((res, rej) => { |
| 480 | const tx = db.transaction(store, "readwrite"); |
| 481 | const req: IDBRequest<IDBValidKey> = tx.objectStore(store).put(value); |
| 482 | req.onsuccess = () => res(); |
| 483 | req.onerror = () => rej(req.error); |
| 484 | }), |
| 485 | add: (store: string, value: unknown) => |
| 486 | new Promise<void>((res, rej) => { |
| 487 | const tx = db.transaction(store, "readwrite"); |
| 488 | const req: IDBRequest<IDBValidKey> = tx.objectStore(store).add(value); |
| 489 | req.onsuccess = () => res(); |
| 490 | req.onerror = () => rej(req.error); |
| 491 | }), |
| 492 | delete: (store: string, key: string) => |
| 493 | new Promise<void>((res, rej) => { |
| 494 | const tx = db.transaction(store, "readwrite"); |
| 495 | const req = tx.objectStore(store).delete(key); |
| 496 | req.onsuccess = () => res(); |
| 497 | req.onerror = () => rej(req.error); |
| 498 | }), |
| 499 | clear: (store: string) => |
| 500 | new Promise<void>((res, rej) => { |
| 501 | const tx = db.transaction(store, "readwrite"); |
| 502 | const req = tx.objectStore(store).clear(); |
| 503 | req.onsuccess = () => res(); |
| 504 | req.onerror = () => rej(req.error); |
| 505 | }), |
| 506 | listFiles: (store: typeof FileStore) => |
| 507 | new Promise((res, rej) => { |
| 508 | const tx = db.transaction(store, "readonly"); |
| 509 | const req = tx.objectStore(store).getAll(); |
| 510 | req.onsuccess = () => res(req.result); |
| 511 | req.onerror = () => rej(req.error); |
| 512 | }), |
| 513 | listPlaylists: (store: typeof PlaylistStore) => |
| 514 | new Promise((res, rej) => { |
| 515 | const tx = db.transaction(store, "readonly"); |
| 516 | const req = tx.objectStore(store).getAll(); |
| 517 | req.onsuccess = () => res(req.result); |
| 518 | req.onerror = () => rej(req.error); |
| 519 | }), |
| 520 | exist: (store: typeof FileStore, key: string) => |
| 521 | new Promise((res, rej) => { |
| 522 | const tx = db.transaction(store, "readonly"); |
| 523 | const req = tx.objectStore(store).count(key); |
| 524 | req.onsuccess = () => res(req.result !== 0); |
| 525 | req.onerror = () => rej(req.error); |
| 526 | }), |
| 527 | }; |
| 528 | } |
| 529 |