japanese-drum-game/public/src/js/loadsong.js

function loadSong(selectedSong, autoPlayEnabled){
	
	var _this = this;
	var _selectedSong=selectedSong;
	var _bgLoaded=false;
	var _musicLoaded=false;
	var _songDataLoaded=false;
	var _songFilePath = '/songs/'+_selectedSong.folder+'/'+_selectedSong.difficulty;
	var _songData;
	
	this.run = function(){
		
		assets.sounds["bgm_songsel"].pause();
		assets.sounds["bgm_songsel"].currentTime = 0;

		assets.sounds["start"].playAsset();
		$("#assets").append("<img id='music-bg' src='/songs/"+_selectedSong.folder+"/bg.png' />");
		
		var audio = new Audio();
        audio.muted = true;
		audio.src = '/songs/'+_selectedSong.folder+'/main.mp3';
		audio.load();
		
		$("#music-bg").load(function(){
			_bgLoaded=true;
			_this.checkIfEverythingLoaded();
		});
		
		audio.playAsset = function(){
			try{
				audio.muted = false;
				audio.play()
			}catch(e){
				console.warn(e)
			}
		}
		
		audio.onloadeddata = function(){
			_musicLoaded=true;
			assets.sounds["main-music"]=audio;
			_this.checkIfEverythingLoaded();
		};
		
		$.ajax({
            url : _songFilePath,
            dataType: "text",
            success : function (data) {
                _songData = data.split("\n");
				_songDataLoaded=true;
				_this.checkIfEverythingLoaded();
            }
        });
		
	}
	
	this.checkIfEverythingLoaded = function(){
		if(_musicLoaded && _songDataLoaded && _bgLoaded){
			$("#screen").load("/src/views/game.html", function(){
				var taikoGame = new Controller(_selectedSong, _songData, autoPlayEnabled);
				taikoGame.run();
			});
		}
	}
	
	$("#screen").load("/src/views/loadsong.html", _this.run);
 }