song: add duration property

docs/Song.html

@@ -289,6 +289,75 @@
 
 
 
+</div>
+
+        
+            
+<div class="section-members">
+<h4 class="name" id="duration"><span class="type-signature"></span>duration<span class="type-signature"> :Number</span></h4>
+
+
+
+
+<div class="description">
+    <p>Song duration.</p>
+</div>
+
+
+
+
+
+<dl class="details">
+
+    
+
+    
+
+    
+
+    
+
+    
+
+    
+
+    
+
+    
+
+    
+
+    
+
+    
+
+    
+
+    
+
+    
+
+    
+
+    
+</dl>
+
+
+
+    <h5>Type:</h5>
+    <ul>
+        <li>
+            
+<span class="param-type"><code>Number</code></span>
+
+
+        </li>
+    </ul>
+
+
+
+
+
 </div>
 
         

src/Song.js

@@ -12,6 +12,11 @@ class Song {
          * @type {string}
          */
         this.name = video.title;
+        /**
+         * Song duration.
+         * @type {Number}
+         */
+        this.duration = ((video.duration.hours*3600)+(video.duration.minutes*60)+(video.duration.seconds)) * 100;
         /**
          * Raw informations about the song.
          * @type {Object}