[disc] Add discnumber to the disc model

This allows us to distinguish between multiple discs within the same
album

src/components/Album/AlbumView.vue

@@ -16,6 +16,9 @@
         </div>
         <template v-if="albumDiscs !== null">
           <div class="album" v-for="disc in albumDiscs" :key="disc.getId()">
+            <h3>
+              {{ $t('album.disc_title', { number: disc.getNumber() }) }}
+            </h3>
             <table>
               <thead>
                 <tr>

src/locales/de.json

@@ -46,7 +46,8 @@
       "name_column_title": "Name",
       "length_column_title": "Länge",
       "year_column_title": "Jahr"
-    }
+    },
+    "disc_title": "CD {number}"
   },
   "artist_list": {
     "title": "Künstler"

src/locales/en.json

@@ -46,7 +46,8 @@
       "name_column_title": "Name",
       "length_column_title": "Length",
       "year_column_title": "Year"
-    }
+    },
+    "disc_title": "Disc {number}"
   },
   "artist_list": {
     "title": "Artists"

src/model/Disc.ts

@@ -11,6 +11,8 @@ export default class Disc implements DiscInterface {
 
   private length: number = 0;
 
+  private number: number = 0;
+
   getId(): number | undefined {
     return this.id;
   }
@@ -22,4 +24,8 @@ export default class Disc implements DiscInterface {
   getLength(): number {
     return this.length;
   }
+
+  getNumber(): number {
+    return this.number
+  }
 }

src/model/DiscInterface.ts

@@ -5,4 +5,6 @@ export default interface DiscInterface {
   getSongList(): Array<SongListItemInterface>;
 
   getLength(): number;
+
+  getNumber(): number;
 }