⬇️ Added downloading features

src/app/app-routing.module.ts

@@ -4,6 +4,8 @@ import { HomeComponent } from './components/home/home.component';
 import { ArtistsComponent } from './components/artists/artists.component';
 import { AlbumsComponent } from './components/albums/albums.component';
 import { SearchComponent } from './components/search/search.component';
+import { AddsongComponent } from './components/addsong/addsong.component';
+import { DownloadsComponent } from './components/downloads/downloads.component';
 
 const routes: Routes = [
   { path: '', component: HomeComponent },
@@ -11,7 +13,9 @@ const routes: Routes = [
   { path: 'artists', component: ArtistsComponent },
   { path: 'albums/:id', component: AlbumsComponent },
   { path: 'albums', component: AlbumsComponent },
-  { path: 'search/:query', component: SearchComponent }
+  { path: 'search/:query', component: SearchComponent },
+  { path: 'add/song', component: AddsongComponent },
+  { path: 'downloads', component: DownloadsComponent }
 ];
 
 @NgModule({

src/app/app.component.html

@@ -7,8 +7,8 @@
             Explore
             <fa-icon [icon]="faGlobeEurope" [fixedWidth]="true"></fa-icon>
         </a>
-        <a routerLink="songs" class="list-group-item list-group-item-action bg-light d-flex justify-content-between align-items-center">
-            Songs
+        <a routerLink="/add/song" class="list-group-item list-group-item-action bg-light d-flex justify-content-between align-items-center">
+            Add Song
             <fa-icon [icon]="faMusic" [fixedWidth]="true"></fa-icon>
         </a>
         <a routerLink="albums" class="list-group-item list-group-item-action bg-light d-flex justify-content-between align-items-center">
@@ -42,5 +42,22 @@
       <router-outlet></router-outlet>
     </div>
 </div>
+
+<div style="position: absolute; top: 0; right: 0;">
+  <div *ngFor="let item of notification.notificationStack" class="toast" role="alert" aria-live="assertive" aria-atomic="true">
+    <div class="toast-header">
+      <img src="..." class="rounded mr-2" alt="...">
+      <strong class="mr-auto">{{ item.user }}</strong>
+      <small>11 mins ago</small>
+      <button type="button" class="ml-2 mb-1 close" data-dismiss="toast" aria-label="Close">
+        <span aria-hidden="true">&times;</span>
+      </button>
+    </div>
+    <div class="toast-body">
+      {{ item.message }}
+    </div>
+  </div>
+</div>
+
 <!-- Music controls -->
 <app-controls class="d-flex"></app-controls>

src/app/app.component.scss

@@ -67,3 +67,7 @@ app-controls {
     margin-left: -15rem;
   }
 }
+
+.toast {
+  opacity: 1;
+}

src/app/app.component.ts

@@ -2,6 +2,7 @@ import { Component, OnInit } from '@angular/core';
 import { faGlobeEurope, faMusic, faCompactDisc, faUsers, faCog, faChevronLeft, faChevronRight } from '@fortawesome/free-solid-svg-icons';
 import { Router } from '@angular/router';
 import { FormBuilder } from '@angular/forms';
+import { NotificationService } from './services/notification.service';
 
 @Component({
   selector: 'app-root',
@@ -26,7 +27,8 @@ export class AppComponent implements OnInit {
 
   constructor(
     public router: Router,
-    private fb: FormBuilder
+    private fb: FormBuilder,
+    public notification: NotificationService
   ) { }
 
   ngOnInit() {

src/app/app.module.ts

@@ -13,6 +13,8 @@ import { AlbumsComponent } from './components/albums/albums.component';
 import { ControlsComponent } from './components/controls/controls.component';
 import { SonglistComponent } from './components/songlist/songlist.component';
 import { SearchComponent } from './components/search/search.component';
+import { AddsongComponent } from './components/addsong/addsong.component';
+import { DownloadsComponent } from './components/downloads/downloads.component';
 
 @NgModule({
   declarations: [
@@ -22,7 +24,9 @@ import { SearchComponent } from './components/search/search.component';
     AlbumsComponent,
     ControlsComponent,
     SonglistComponent,
-    SearchComponent
+    SearchComponent,
+    AddsongComponent,
+    DownloadsComponent
   ],
   imports: [
     BrowserModule,

src/app/components/addsong/addsong.component.html

@@ -0,0 +1,4 @@
+<form [formGroup]="form" (ngSubmit)="onSubmit()">
+  <input type="text" formControlName="id">
+  <input type="submit">
+</form>

src/app/components/addsong/addsong.component.spec.ts

@@ -0,0 +1,25 @@
+import { async, ComponentFixture, TestBed } from '@angular/core/testing';
+
+import { AddsongComponent } from './addsong.component';
+
+describe('AddsongComponent', () => {
+  let component: AddsongComponent;
+  let fixture: ComponentFixture<AddsongComponent>;
+
+  beforeEach(async(() => {
+    TestBed.configureTestingModule({
+      declarations: [ AddsongComponent ]
+    })
+    .compileComponents();
+  }));
+
+  beforeEach(() => {
+    fixture = TestBed.createComponent(AddsongComponent);
+    component = fixture.componentInstance;
+    fixture.detectChanges();
+  });
+
+  it('should create', () => {
+    expect(component).toBeTruthy();
+  });
+});

src/app/components/addsong/addsong.component.ts

@@ -0,0 +1,27 @@
+import { Component, OnInit } from '@angular/core';
+import { DownloadService } from 'src/app/services/download.service';
+import { FormBuilder } from '@angular/forms';
+
+@Component({
+  selector: 'app-addsong',
+  templateUrl: './addsong.component.html',
+  styleUrls: ['./addsong.component.scss']
+})
+export class AddsongComponent implements OnInit {
+
+  form = this.fb.group({
+    id: ''
+  });
+
+  constructor(
+    private download: DownloadService,
+    private fb: FormBuilder
+  ) { }
+
+  ngOnInit() { }
+
+  onSubmit() {
+    this.download.addQueueItem(this.form.value.id);
+  }
+
+}

src/app/components/downloads/downloads.component.html

@@ -0,0 +1,9 @@
+<div class="container mt-2" *ngIf="downloadQueue as queue">
+  <div *ngFor="let item of queue.data.result">
+    {{ item.info.title }}
+    <div class="progress">
+      <div class="progress-bar" role="progressbar" [style.width]="getProgress(download.convertTimeToSeconds(item.progress.timemark) / item.info.length_seconds * 100)" aria-valuenow="25" aria-valuemin="0"
+        aria-valuemax="100"></div>
+    </div>
+  </div>
+</div>

src/app/components/downloads/downloads.component.spec.ts

@@ -0,0 +1,25 @@
+import { async, ComponentFixture, TestBed } from '@angular/core/testing';
+
+import { DownloadsComponent } from './downloads.component';
+
+describe('DownloadsComponent', () => {
+  let component: DownloadsComponent;
+  let fixture: ComponentFixture<DownloadsComponent>;
+
+  beforeEach(async(() => {
+    TestBed.configureTestingModule({
+      declarations: [ DownloadsComponent ]
+    })
+    .compileComponents();
+  }));
+
+  beforeEach(() => {
+    fixture = TestBed.createComponent(DownloadsComponent);
+    component = fixture.componentInstance;
+    fixture.detectChanges();
+  });
+
+  it('should create', () => {
+    expect(component).toBeTruthy();
+  });
+});

src/app/components/downloads/downloads.component.ts

@@ -0,0 +1,38 @@
+import { Component, OnInit } from '@angular/core';
+import { DownloadService } from 'src/app/services/download.service';
+import { AxiosResponse } from 'axios';
+import { ApiData } from 'src/app/services/data.service';
+import { DomSanitizer } from '@angular/platform-browser';
+
+@Component({
+  selector: 'app-downloads',
+  templateUrl: './downloads.component.html',
+  styleUrls: ['./downloads.component.scss']
+})
+export class DownloadsComponent implements OnInit {
+
+  downloadQueue: AxiosResponse<ApiData>;
+
+  constructor(
+    public download: DownloadService,
+    private sanitizer: DomSanitizer
+  ) { }
+
+  ngOnInit() {
+    this.getDownloadQueue();
+    setInterval(() => {
+      this.getDownloadQueue();
+    }, 1000);
+  }
+
+  getDownloadQueue() {
+    this.download.getDownloadQueue().then(res => {
+      this.downloadQueue = res;
+    });
+  }
+
+  getProgress(val) {
+    return this.sanitizer.bypassSecurityTrustStyle(`${val}%`);
+  }
+
+}

src/app/components/home/home.component.ts

@@ -11,7 +11,6 @@ import { ApiService } from 'src/app/services/api.service';
 export class HomeComponent implements OnInit {
 
   songs: Promise<Song[]>;
-  artists: Artist[] = [];
 
   constructor(
     private api: ApiService,

src/app/services/data.service.ts

@@ -24,9 +24,7 @@ export class DataService {
   private axiosInstance: AxiosInstance;
 
   constructor() {
-    this.axiosInstance = axios.create({
-      timeout: 3000
-    });
+    this.axiosInstance = axios.create();
   }
   /**
    * @param type The type of the thing you want to get. The type is a string containing either 'artist', 'album' or 'song'.
@@ -85,4 +83,12 @@ export class DataService {
   search(query: string): Promise<AxiosResponse<ApiData>> {
     return this.axiosInstance.get(`${this.apiUrl}/search/${query}`);
   }
+
+  download(id: string): Promise<AxiosResponse<ApiData>> {
+    return this.axiosInstance.get(`${this.apiUrl}/download/${id}`);
+  }
+
+  downloadqueue(): Promise<AxiosResponse<ApiData>> {
+    return this.axiosInstance.get(`${this.apiUrl}/downloadqueue`);
+  }
 }

src/app/services/download.service.spec.ts

@@ -0,0 +1,12 @@
+import { TestBed } from '@angular/core/testing';
+
+import { DownloadService } from './download.service';
+
+describe('DownloadService', () => {
+  beforeEach(() => TestBed.configureTestingModule({}));
+
+  it('should be created', () => {
+    const service: DownloadService = TestBed.get(DownloadService);
+    expect(service).toBeTruthy();
+  });
+});

src/app/services/download.service.ts

@@ -0,0 +1,47 @@
+import { Injectable } from '@angular/core';
+import { DataService } from './data.service';
+import { AxiosResponse } from 'axios';
+import { NotificationService } from './notification.service';
+
+@Injectable({
+  providedIn: 'root'
+})
+export class DownloadService {
+
+  constructor(
+    private data: DataService,
+    private notification: NotificationService
+  ) { }
+
+  downloadQueue: Promise<AxiosResponse>[] = [];
+
+  addQueueItem(id: string) {
+    const index = this.downloadQueue.push(this.data.download(id)) - 1;
+    this.downloadQueue[index].then(res => {
+      // tslint:disable-next-line: max-line-length
+      this.notification.newNotification({ user: 'Download manager', message: `The song ${res.data.result.title} is downloaded successfully.`}, 100000);
+      this.downloadQueue.splice(index, 1);
+    });
+  }
+
+  getDownloadQueue() {
+    return this.data.downloadqueue();
+  }
+
+  // Input like: "00:00:54.43"
+  convertTimeToSeconds(input: string): number {
+    if (typeof input === 'string') {
+      const parts = input.split(/[\:\.]/);
+      let total = 0;
+
+      total += Number(parts[0]) * 60 * 60; // Hours
+      total += Number(parts[1]) * 60; // Minutes
+      total += Number(parts[2]); // Seconds
+      total += Number(parts[3]) / 100; // Centiseconds
+
+      return total;
+    } else {
+      return;
+    }
+  }
+}

src/app/services/notification.service.ts

@@ -1,9 +1,24 @@
 import { Injectable } from '@angular/core';
 
+interface Notification {
+  user: string;
+  message: string;
+}
+
 @Injectable({
   providedIn: 'root'
 })
 export class NotificationService {
 
-  constructor() { }
+  constructor() {
+
+  }
+
+  notificationStack: Notification[] = [];
+
+  newNotification(notification: Notification, timeout: number = 3000) {
+    const index = this.notificationStack.push(notification);
+    setTimeout(() => this.notificationStack.splice(index - 1, 1), timeout);
+  }
+
 }