feat: subsonic library pagination

server/src/subsonic.ts

@@ -71,4 +71,25 @@ export class SubsonicClient {
   async ping(): Promise<void> {
     await this.request('ping')
   }
+
+  async getAllAlbums(
+    onProgress?: (albums: SubsonicAlbum[], done: number) => void
+  ): Promise<SubsonicAlbum[]> {
+    const all: SubsonicAlbum[] = []
+    const pageSize = 500
+    for (let offset = 0; ; offset += pageSize) {
+      const envelope = await this.request('getAlbumList2', {
+        type: 'alphabeticalByName',
+        size: String(pageSize),
+        offset: String(offset),
+      })
+      const list: any[] = envelope.albumList2?.album ?? []
+      for (const a of list) {
+        all.push({ id: String(a.id), title: a.name ?? a.title ?? '', artist: a.artist ?? '' })
+      }
+      onProgress?.(all, all.length)
+      if (list.length < pageSize || all.length > 20000) break
+    }
+    return all
+  }
 }