Add 2-player mode

public/src/js/loadsong.js

@@ -1,7 +1,9 @@
 class loadSong{
-	constructor(selectedSong, autoPlayEnabled){
+	constructor(selectedSong, autoPlayEnabled, multiplayer){
 		this.selectedSong = selectedSong
+		this.multiplayer = multiplayer
 		this.autoPlayEnabled = autoPlayEnabled
+		this.diff = this.selectedSong.difficulty.slice(0, -4)
 		this.songFilePath = "/songs/" + this.selectedSong.folder + "/" + this.selectedSong.difficulty
 		$("#screen").load("/src/views/loadsong.html", () => {
 			this.run()
@@ -42,11 +44,46 @@ class loadSong{
 		
 		Promise.all(promises).then(() => {
 			$("#screen").load("/src/views/game.html", () => {
-				var taikoGame = new Controller(this.selectedSong, this.songData, this.autoPlayEnabled)
-				taikoGame.run()
+				this.setupMultiplayer()
 			})
-		}, () => {
+		}, error => {
+			console.error(error)
 			alert("An error occurred, please refresh")
 		})
 	}
- }
+	setupMultiplayer(){
+		if(this.multiplayer){
+			this.song2Data = this.songData
+			this.selectedSong2 = this.selectedSong
+			p2.onmessage("gamestart", () => {
+				var taikoGame1 = new Controller(this.selectedSong, this.songData, false, 1)
+				var taikoGame2 = new Controller(this.selectedSong2, this.song2Data, true, 2)
+				taikoGame1.run(taikoGame2)
+			}, true)
+			p2.onmessage("gameload", response => {
+				if(response == this.diff){
+					p2.send("gamestart")
+				}else{
+					this.selectedSong2 = {
+						title: this.selectedSong.title,
+						folder: this.selectedSong.folder,
+						difficulty: response + ".osu"
+					}
+					ajax("/songs/" + this.selectedSong2.folder + "/" + this.selectedSong2.difficulty).then(data => {
+						this.song2Data = data.replace(/\0/g, "").split("\n")
+						p2.send("gamestart")
+					}, () => {
+						p2.send("gamestart")
+					})
+				}
+			}, true)
+			p2.send("join", {
+				id: this.selectedSong.folder,
+				diff: this.diff
+			})
+		}else{
+			var taikoGame = new Controller(this.selectedSong, this.songData, this.autoPlayEnabled)
+			taikoGame.run()
+		}
+	}
+}