Bugfix/682 slow loading of queue

src/app/data/repositories/track-repository.base.ts

@@ -11,6 +11,7 @@ export abstract class TrackRepositoryBase {
     public abstract getTracksForTrackArtists(trackArtists: string[]): Track[] | undefined;
     public abstract getTracksForAlbumArtists(albumArtists: string[]): Track[] | undefined;
     public abstract getTracksForGenres(genres: string[]): Track[] | undefined;
+    public abstract getTracksForPaths(paths: string[]): Track[] | undefined;
     public abstract getAlbumDataForAlbumKey(albumKeyIndex: string, albumKey: string): AlbumData[] | undefined;
     public abstract getAllAlbumData(albumKeyIndex: string): AlbumData[] | undefined;
     public abstract getAlbumDataForTrackArtists(albumKeyIndex: string, trackArtists: string[]): AlbumData[] | undefined;

src/app/data/repositories/track-repository.ts

@@ -107,6 +107,22 @@ export class TrackRepository implements TrackRepositoryBase {
         return tracks;
     }
 
+    public getTracksForPaths(paths: string[]): Track[] | undefined {
+        const database: any = this.databaseFactory.create();
+
+        let filterQuery: string = '';
+
+        if (paths != undefined && paths.length > 0) {
+            filterQuery = ` AND ${ClauseCreator.createTextInClause('t.Path', paths)}`;
+        }
+
+        const statement = database.prepare(`${QueryParts.selectTracksQueryPart(true)} ${filterQuery};`);
+
+        const tracks: Track[] | undefined = statement.all();
+
+        return tracks;
+    }
+
     public getAlbumDataThatNeedsIndexing(albumKeyIndex: string): AlbumData[] | undefined {
         const database = this.databaseFactory.create();
 

src/app/services/playback/queue-persister.ts

@@ -6,12 +6,16 @@ import { QueuedTrack } from '../../data/entities/queued-track';
 import { TrackModel } from '../track/track-model';
 import { QueueRestoreInfo } from './queue-restore-info';
 import { TrackModelFactory } from '../track/track-model-factory';
-import {SettingsBase} from "../../common/settings/settings.base";
+import { SettingsBase } from '../../common/settings/settings.base';
+import { Track } from '../../data/entities/track';
+import { TrackRepositoryBase } from '../../data/repositories/track-repository.base';
+import { Timer } from '../../common/scheduling/timer';
 
 @Injectable({ providedIn: 'root' })
 export class QueuePersister {
     public constructor(
         private queuedTrackRepository: QueuedTrackRepositoryBase,
+        private trackRepository: TrackRepositoryBase,
         private trackModelFactory: TrackModelFactory,
         private settings: SettingsBase,
         private logger: Logger,
@@ -60,28 +64,61 @@ export class QueuePersister {
                 return new QueueRestoreInfo([], [], undefined, 0);
             }
 
-            const tracks: TrackModel[] = [];
+            const tracksModels: TrackModel[] = [];
             const playbackOrder: number[] = new Array<number>(savedQueuedTracks.length).fill(0);
             let playingTrack: TrackModel | undefined = undefined;
             let progressSeconds: number = 0;
 
-            const albumKeyIndex = this.settings.albumKeyIndex;
+            const tracks: Track[] | undefined = this.trackRepository.getTracksForPaths(savedQueuedTracks.map((x) => x.path));
+
+            if (!tracks || tracks.length === 0) {
+                this.logger.info(`No tracks found for saved queued tracks.`, 'QueuePersister', 'restore');
+                return new QueueRestoreInfo([], [], undefined, 0);
+            }
 
-            for (const savedQueuedTrack of savedQueuedTracks) {
-                const track: TrackModel = await this.trackModelFactory.createFromFileAsync(savedQueuedTrack.path, albumKeyIndex);
+            const timer = new Timer();
+            timer.start();
 
-                tracks.push(track);
-                playbackOrder[savedQueuedTrack.orderId] = tracks.length - 1;
+            const albumKeyIndex = this.settings.albumKeyIndex;
 
-                if (savedQueuedTrack.isPlaying) {
-                    playingTrack = track;
-                    progressSeconds = savedQueuedTrack.progressSeconds;
+            const trackMap = new Map(savedQueuedTracks.map((track) => [track.path, track]));
+            const orderedTracks = tracks
+                .sort((a, b) => {
+                    const orderA = trackMap.get(a.path)?.orderId ?? 0;
+                    const orderB = trackMap.get(b.path)?.orderId ?? 0;
+                    return orderA - orderB;
+                })
+                .map((track) => {
+                    const savedTrack = trackMap.get(track.path);
+                    return {
+                        ...track,
+                        isPlaying: savedTrack?.isPlaying ?? 0,
+                        orderId: savedTrack?.orderId ?? 0,
+                        progressSeconds: savedTrack?.progressSeconds ?? 0,
+                    };
+                });
+
+            for (const orderedTrack of orderedTracks) {
+                const trackModel: TrackModel = this.trackModelFactory.createFromTrack(orderedTrack, albumKeyIndex);
+
+                tracksModels.push(trackModel);
+                playbackOrder[orderedTrack.orderId] = tracksModels.length - 1;
+
+                if (orderedTrack.isPlaying) {
+                    playingTrack = trackModel;
+                    progressSeconds = orderedTrack.progressSeconds;
                 }
             }
 
-            this.logger.info(`Restored queue of ${savedQueuedTracks.length} tracks`, 'QueuePersister', 'restore');
+            timer.stop();
+
+            this.logger.info(
+                `Restored queue of ${savedQueuedTracks.length} tracks. Time required: ${timer.elapsedMilliseconds} ms`,
+                'QueuePersister',
+                'restore',
+            );
 
-            return new QueueRestoreInfo(tracks, playbackOrder, playingTrack, progressSeconds);
+            return new QueueRestoreInfo(tracksModels, playbackOrder, playingTrack, progressSeconds);
         } catch (e: unknown) {
             if (e instanceof Error) {
                 this.logger.error(e, 'Failed to restore queue', 'QueuePersister', 'restore');