moved createID to MiscMethods.js

began work on playlist management.

src/App.js

@@ -28,14 +28,14 @@ const filepath = new Filepath("C:\\Users\\Paoda\\Downloads");
     song = await Song.getMetadata(song);
     Song.setAlbumArt(song.metadata);
 
-    mp.load(song);
+    mp.loadSong(song);
     // mp.play();
 
     mp.element.onended = async () => {
         let song = new Song(list[~~(Math.random() * list.length)]);
         song = await Song.getMetadata(song);
         Song.setAlbumArt(song.metadata);
-        mp.load(song);
+        mp.loadSong(song);
         mp.play();
     };
 })();

src/components/Body.js

@@ -29,12 +29,14 @@ export default class Body extends React.Component {
         this.initialize();
     }
     shouldComponentUpdate(nextProps, state) {
-        if (this.state.table.id) return this.state.table.id !== state.table.id;
+        if (this.state.table) return this.state.table.id !== state.table.id;
+        else return false;
         // On Feb 13 2019 Had problem wehre this.state.table.id was undefined.
         // Unable to replicate issue, but it's a serous one. Probably should fix this yeah?
     }
     render() {
-        console.log("Render TableID: " + this.state.table.id);
+        if (this.state.table) console.log("Render TableID: " + this.state.table.id);
+        else console.warn("No Table Present");
         return (
             <div className="wrapper">
                 <div id="searchBar">

src/components/Body/Table.js

@@ -1,7 +1,7 @@
 import React from "react";
 import Song from "../../melodii/Song";
 import MusicPlayer from "../../melodii/MusicPlayer";
-import Misc from "../MiscMethods";
+import Misc, { createID } from "../MiscMethods";
 import Emitter from "../../melodii/Events";
 import Filepath from "../../melodii/Filepath";
 import Settings from 'electron-settings';
@@ -10,8 +10,6 @@ import Settings from 'electron-settings';
 var active = document.createElement("tr");
 active.classList.toggle("active");
 
-const usedTableIDs = [];
-
 const mp = new MusicPlayer();
 var JSXcache;
 
@@ -152,7 +150,7 @@ export default class Table extends React.Component {
             let filepath = e.currentTarget.dataset.filepath;
 
             let song = new Song(filepath);
-            mp.load(song);
+            mp.loadSong(song);
             mp.play();
 
             song = await Song.getMetadata(song);
@@ -173,7 +171,7 @@ export default class Table extends React.Component {
             let filepath = e.currentTarget.dataset.filepath;
 
             let song = new Song(filepath);
-            mp.load(song);
+            mp.loadSong(song);
             mp.play();
 
             song = await Song.getMetadata(song);
@@ -243,29 +241,6 @@ export async function generate(path, template) {
             res(table);
         });
     }
-
-    /**
-     * Creates a unique ID that is not UUID compliant.
-     * - used to distinguish table objects from one another. 
-     * @param {Number} length 
-     * @return {String}
-     */
-    function createID(length) {
-        const chars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
-        let id;
-
-        do {
-            id = "";
-            for (let i = 0; i < length; i++) id += chars[randInt(0, chars.length)];
-        } while(usedTableIDs.includes(id));
-
-        usedTableIDs.push(id);
-        return id;
-
-        function randInt(min, max) {
-            return ~~(Math.random() * (max - min) + min);
-        }
-    }
 }
 
 /**

src/components/MiscMethods.js

@@ -1,5 +1,7 @@
 import Song from "../melodii/Song";
 
+const usedTableIDs = [];
+
 /**
  * - Every Method in this file must be Static and _probably_ Synchronous
  * - The Methods contained in this class must only be methods that don't really fit anywhere else
@@ -322,3 +324,26 @@ export default class MiscMethods {
         return [stringA, stringB];
     }
 }
+
+ /**
+ * Creates a unique ID that is not UUID compliant.
+ * - used to distinguish table objects from one another. 
+ * @param {Number} length 
+ * @return {String}
+*/
+export function createID(length) {
+    const chars = "abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789";
+    let id;
+
+    do {
+        id = "";
+        for (let i = 0; i < length; i++) id += chars[randInt(0, chars.length)];
+    } while(usedTableIDs.includes(id));
+
+    usedTableIDs.push(id);
+    return id;
+
+    function randInt(min, max) {
+        return ~~(Math.random() * (max - min) + min);
+    }
+}

src/melodii/MusicPlayer.js

@@ -1,6 +1,7 @@
 import Emitter from "./Events";
 import SongArchive from "./SongArchive";
 import Song from './Song';
+import Playlist from "./Playlist";
 
 var mp = new Audio();
 var archive = new SongArchive();
@@ -9,6 +10,8 @@ export default class MusicPlayer {
     constructor() {
         this.element = mp;
         this.isPaused = false;
+
+        this.playlist = null;
     }
 
     /** Pauses Music and sets currentTime to 0. */
@@ -39,10 +42,28 @@ export default class MusicPlayer {
         }
     }
 
+
+    /**
+     * 
+     * @param {Playlist} playlist 
+     */
+    load(playlist) {
+        const song = playlist.next();
+        let path = song.location;
+
+        try {
+            this.element.src = this.getURICompatible(path);
+            this.element.load();
+            console.log("'" + path + "'" + " from " + playlist.title + " was succesfully loaded");
+        } catch(e) { 
+            console.error(path + " failed to load " + e.name + " from " + playlist.title); 
+        }
+    }
+
     /** Loads Song
      * @param {Song} song
      */
-    load(song) {
+    loadSong(song) {
         if (archive.getCurrentSong() !== undefined)
             archive.add(archive.getCurrentSong());
         let path = song.location;

src/melodii/Playlist.js

@@ -1,5 +1,5 @@
 import Filepath from "./Filepath";
-import Misc from "../components/MiscMethods";
+import Misc, { createID } from "../components/MiscMethods";
 import Song from "./Song";
 
 export default class Playlist {
@@ -11,6 +11,22 @@ export default class Playlist {
      */
     constructor(title, path) {
         this.initialize(title, path);
+
+        this.id = createID(25);
+
+        this.songs = [];
+        this.currentSong;
+        this.songIndex = 0;
+
+
+    }
+
+    /**
+     * This method returns the "next" song in the playlist.
+     * @return {Song}
+     */
+    next() {  
+        return this.songs[this.songIndex++]; 
     }
 
     /**
@@ -50,4 +66,12 @@ export default class Playlist {
             res(content);
         });
     }
+
+    songs() {
+        return this.songs;
+    }
+
+    currentSong() {
+        return this.currentSong;
+    }
 }