refactor(frontend): refactor frontend services code

src/frontend/src/app/components/playlist-box/playlist-box.component.ts

@@ -1,8 +1,9 @@
 import {Component, Input} from '@angular/core';
 import {AsyncPipe, CommonModule, NgForOf, NgIf} from "@angular/common";
 import {TrackListComponent} from "../track-list/track-list.component";
-import {Playlist, PlaylistService, PlaylistStatusEnum, PlaylistUi} from "../../services/playlist.service";
+import {PlaylistService, PlaylistStatusEnum, PlaylistUi} from "../../services/playlist.service";
 import {Observable, map} from "rxjs";
+import {Playlist} from "../../models/playlist";
 
 const STATUS2CLASS = {
   [PlaylistStatusEnum.Completed]: 'is-success',

src/frontend/src/app/components/track-list/track-list.component.ts

@@ -1,7 +1,8 @@
 import {Component, Input} from '@angular/core';
 import {CommonModule, NgFor, NgSwitch, NgSwitchCase} from "@angular/common";
-import {Track, TrackService, TrackStatusEnum} from "../../services/track.service";
+import {TrackService} from "../../services/track.service";
 import {Observable} from "rxjs";
+import {Track, TrackStatusEnum} from "../../models/track";
 
 @Component({
   selector: 'app-track-list',

src/frontend/src/app/models/playlist.ts

@@ -0,0 +1,8 @@
+export interface Playlist {
+  id: number;
+  name?: string;
+  spotifyUrl: string;
+  error?: string;
+  active: boolean;
+  createdAt: number;
+}

src/frontend/src/app/models/track.ts

@@ -0,0 +1,19 @@
+export interface Track {
+  id: number;
+  artist: string;
+  name: string;
+  spotifyUrl: string;
+  youtubeUrl: string;
+  status: TrackStatusEnum;
+  playlistId?: number;
+  error?: string;
+}
+
+export enum TrackStatusEnum {
+  New,
+  Searching,
+  Queued,
+  Downloading,
+  Completed,
+  Error,
+}

src/frontend/src/app/services/playlist.service.ts

@@ -3,9 +3,7 @@ import {createStore} from "@ngneat/elf";
 import {HttpClient} from "@angular/common/http";
 import {
   deleteEntities,
-  getEntityByPredicate,
   selectAllEntities, selectEntities, selectEntity,
-  selectEntityByPredicate,
   setEntities,
   UIEntitiesRef,
   unionEntities, updateEntities, upsertEntities,
@@ -14,20 +12,17 @@ import {
 } from "@ngneat/elf-entities";
 import {joinRequestResult, trackRequestResult} from "@ngneat/elf-requests";
 import {combineLatest, filter, first, map, Observable, of, switchMap, tap} from "rxjs";
-import {Track, TrackService} from "./track.service";
+import {TrackService} from "./track.service";
 import {Socket} from "ngx-socket-io";
+import {Playlist} from "../models/playlist";
 
 const STORE_NAME = 'playlist';
 const ENDPOINT = '/api/playlist';
 const CREATE_LOADING = 'CREATE_LOADING';
-
-export interface Playlist {
-  id: number;
-  name?: string;
-  spotifyUrl: string;
-  error?: string;
-  active: boolean;
-  createdAt: number;
+enum WsPlaylistOperation {
+  New = 'playlistNew',
+  Update = 'playlistUpdate',
+  Delete = 'playlistDelete',
 }
 
 export interface PlaylistUi {
@@ -53,26 +48,18 @@ export class PlaylistService {
     withEntities<Playlist>(),
     withUIEntities<PlaylistUi>()
   );
+
   all$ = this.store.combine({
     entities: this.store.pipe(selectAllEntities()),
     UIEntities: this.store.pipe(selectEntities({ ref: UIEntitiesRef })),
-  }).pipe(unionEntities(), map(data => data.sort((a, b) => this.sort(a, b))));
-
-  loading$ = this.store.pipe(joinRequestResult([STORE_NAME]));
+  }).pipe(unionEntities(), map(data => data.sort((a, b) => this.groupActiveAndSortByCreation(a, b))));
   createLoading$ = this.store.pipe(joinRequestResult([CREATE_LOADING], { initialStatus: 'idle' }));
 
   constructor(private readonly http: HttpClient,
               private readonly socket: Socket,
               private readonly trackService: TrackService,
   ) {
-    this.socket.on('playlistUpdate', (playlist: Playlist) => this.store.update(upsertEntities(playlist)));
-    this.socket.on('playlistDelete', ({id}: {id: number}) => this.store.update(deleteEntities(Number(id))));
-    this.socket.on('playlistNew', (playlist: Playlist) =>
-      this.store.update(
-        upsertEntities(playlist),
-        upsertEntities({id: playlist.id, collapsed: false}, {ref: UIEntitiesRef})
-      )
-    );
+    this.initWsConnection();
   }
 
   getById(id: number): Observable<Playlist | undefined> {
@@ -133,7 +120,6 @@ export class PlaylistService {
         setEntities(data.map(item => ({id: item.id, collapsed: false})), {ref: UIEntitiesRef})
       )),
       tap((data: Playlist[]) => data.forEach(playlist => this.trackService.fetch(playlist.id))),
-      trackRequestResult([STORE_NAME], { skipCache: true }),
     ).subscribe();
   }
 
@@ -144,17 +130,13 @@ export class PlaylistService {
   }
 
   toggleCollapsed(id: number): void {
-    this.store.update(updateEntities(id, old => ({...old, collapsed: !old.collapsed}), { ref: UIEntitiesRef }))
+    this.store.update(updateEntities(id, old => ({...old, collapsed: !old.collapsed}), { ref: UIEntitiesRef }));
   }
 
   delete(id: number): void {
     this.delete$(id).subscribe();
   }
 
-  private delete$(id: number): Observable<void> {
-    return this.http.delete<void>(`${ENDPOINT}/${id}`);
-  }
-
   retryFailed(id: number): void {
     this.http.get<void>(`${ENDPOINT}/retry/${id}`).subscribe();
   }
@@ -163,7 +145,22 @@ export class PlaylistService {
     this.http.put<void>(`${ENDPOINT}/${id}`, {active}).subscribe();
   }
 
-  private sort(a: Playlist & PlaylistUi, b: Playlist & PlaylistUi): number {
+  private delete$(id: number): Observable<void> {
+    return this.http.delete<void>(`${ENDPOINT}/${id}`);
+  }
+
+  private groupActiveAndSortByCreation(a: Playlist & PlaylistUi, b: Playlist & PlaylistUi): number {
     return a.active === b.active ? (b.createdAt - a.createdAt) : (a.active < b.active ? 1 : -1);
   }
+
+  private initWsConnection(): void {
+    this.socket.on(WsPlaylistOperation.Update, (playlist: Playlist) => this.store.update(upsertEntities(playlist)));
+    this.socket.on(WsPlaylistOperation.Delete, ({id}: {id: number}) => this.store.update(deleteEntities(Number(id))));
+    this.socket.on(WsPlaylistOperation.New, (playlist: Playlist) =>
+      this.store.update(
+        upsertEntities(playlist),
+        upsertEntities({id: playlist.id, collapsed: false}, {ref: UIEntitiesRef})
+      )
+    );
+  }
 }

src/frontend/src/app/services/track.service.ts

@@ -3,30 +3,15 @@ import {createStore} from "@ngneat/elf";
 import {deleteEntities, selectManyByPredicate, upsertEntities, withEntities} from "@ngneat/elf-entities";
 import {Socket} from "ngx-socket-io";
 import {map, Observable, tap} from "rxjs";
-import {trackRequestResult} from "@ngneat/elf-requests";
 import {HttpClient} from "@angular/common/http";
+import {Track, TrackStatusEnum} from "../models/track";
 
 const STORE_NAME = 'track';
 const ENDPOINT = '/api/track';
-
-export interface Track {
-  id: number;
-  artist: string;
-  name: string;
-  spotifyUrl: string;
-  youtubeUrl: string;
-  status: TrackStatusEnum;
-  playlistId?: number;
-  error?: string;
-}
-
-export enum TrackStatusEnum {
-  New,
-  Searching,
-  Queued,
-  Downloading,
-  Completed,
-  Error,
+enum WsTrackOperation {
+  New = 'trackNew',
+  Update = 'trackUpdate',
+  Delete = 'trackDelete',
 }
 
 @Injectable({
@@ -58,17 +43,12 @@ export class TrackService {
     private readonly http: HttpClient,
     private readonly socket: Socket,
   ) {
-    this.socket.on('trackUpdate', (track: Track) => this.store.update(upsertEntities(track)));
-    this.socket.on('trackDelete', ({id}: {id: number}) => this.store.update(deleteEntities(id)));
-    this.socket.on('trackNew', ({track, playlistId}: {track: Track, playlistId: number}) =>
-      this.store.update(upsertEntities([{...track, playlistId}]))
-    );
+    this.initWsConnection();
   }
 
   fetch(playlistId: number): void {
     this.http.get<Track[]>(`${ENDPOINT}/playlist/${playlistId}`).pipe(
       tap((data: Track[]) => this.store.update(upsertEntities(data.map(track => ({...track, playlistId}))))),
-      trackRequestResult([STORE_NAME], { skipCache: true }),
     ).subscribe();
   }
 
@@ -79,4 +59,12 @@ export class TrackService {
   retry(id: number): void {
     this.http.get(`${ENDPOINT}/retry/${id}`).subscribe();
   }
+
+  private initWsConnection(): void {
+    this.socket.on(WsTrackOperation.Update, (track: Track) => this.store.update(upsertEntities(track)));
+    this.socket.on(WsTrackOperation.Delete, ({id}: {id: number}) => this.store.update(deleteEntities(id)));
+    this.socket.on(WsTrackOperation.New, ({track, playlistId}: {track: Track, playlistId: number}) =>
+      this.store.update(upsertEntities([{...track, playlistId}]))
+    );
+  }
 }