Přidání ovládání hlasitosi

closes #1

js/controller.js

@@ -70,6 +70,9 @@ class Controller {
       }.bind(this)
     );
 
+    const volume = document.getElementById("volume");
+    volume.addEventListener("input", this.view.videoPlayer.updateVolume);
+
     document.addEventListener(
       "keyup",
       function (e) {

js/video.js

@@ -46,6 +46,17 @@ class VideoPlayer {
       console.log("here");
     }
   }
+  updateVolume() {
+    const volume = document.getElementById("volume");
+    const volumeBar = document.getElementById("volume-bar-value");
+
+    if (video.muted) {
+      video.muted = false;
+    }
+
+    video.volume = volume.value / 100;
+    volumeBar.style.width = volume.value + "%";
+  }
   // Play pause
   togglePlay() {
     if (this.video.paused || this.video.ended) {