Made theme toggleable

ui/src/app/app.component.html

@@ -12,6 +12,10 @@
     </ul>
   </div>
   -->
+  <div>
+    <span class="text-white">Toggle Theme</span>
+    <input style="margin: 1rem;" type="checkbox" [ngModel]="this.darkMode" aria-label="Toggle theme" (change)="themeChanged()">
+  </div>
 </nav>
 
 <main role="main" class="container">

ui/src/app/app.component.ts

@@ -19,6 +19,7 @@ export class AppComponent implements AfterViewInit {
   quality: string;
   format: string;
   addInProgress = false;
+  darkMode: boolean;
 
   @ViewChild('queueMasterCheckbox') queueMasterCheckbox: MasterCheckboxComponent;
   @ViewChild('queueDelSelected') queueDelSelected: ElementRef;
@@ -37,6 +38,7 @@ export class AppComponent implements AfterViewInit {
     // Needs to be set or qualities won't automatically be set
     this.setQualities()
     this.quality = cookieService.get('metube_quality') || 'best';
+    this.setupTheme(cookieService)
   }
 
   ngAfterViewInit() {
@@ -67,6 +69,27 @@ export class AppComponent implements AfterViewInit {
     this.cookieService.set('metube_quality', this.quality, { expires: 3650 });
   }
 
+  setupTheme(cookieService) {
+    if (cookieService.check('metube_dark')) {
+      this.darkMode = cookieService.get('metube_dark') === "true"
+    } else {
+      this.darkMode = window.matchMedia("prefers-color-scheme: dark").matches
+    }
+    this.setTheme()
+  }
+
+  themeChanged() {
+    this.darkMode = !this.darkMode
+    this.cookieService.set('metube_dark', this.darkMode.toString(), { expires: 3650 });
+    this.setTheme()
+  }
+
+  setTheme() {
+    const doc = document.querySelector('html')
+    const filter = this.darkMode ? "invert(1) hue-rotate(180deg)" : ""
+    doc.style.filter = filter
+  }
+
   formatChanged() {
     this.cookieService.set('metube_format', this.format, { expires: 3650 });
     // Updates to use qualities available

ui/src/styles.sass

@@ -1,8 +1,4 @@
 /* You can add global styles to this file, and also import other style files */
 
-@media(prefers-color-scheme: dark)
-    html 
-        filter: invert(1) hue-rotate(180deg)
-
 /* Importing Bootstrap SCSS file. */
 @import '~bootstrap/scss/bootstrap'