Add: HeartManager, HeartGauge

src/game/lib/heart_gauge.js

@@ -0,0 +1,22 @@
+class HeartGauge {
+
+	constructor(heartManager) {
+		this.heartManager = heartManager;
+
+		this.heartManager.addOnChangeHeartListener(
+			() => {
+				console.log(this.heartManager.getHearts());
+			}
+		);
+	};
+
+}
+
+HeartGauge.DEFAULT_TEXT_FONT = {
+	font: "30px Arial",
+	boundsAlignH: "center",		// left, center. right
+	boundsAlignV: "middle", 	// top, middle, bottom
+	fill: "#fff"
+};
+
+HeartGauge.MOVE_UP_AMOUNT_PX				= 50;

src/game/lib/heart_manager.js

@@ -0,0 +1,95 @@
+class HeartManager {
+
+	constructor() {
+		this.countHearts = HeartManager.DEFAULT_MAX_COUNT;
+		this.countMaxHearts = HeartManager.DEFAULT_MAX_COUNT;
+
+		this.onChangeHeartListeners = [];
+		this.onChangeGameOverListeners = [];
+	}
+
+	callListener(functionArray) {
+		if(functionArray.length > 0) {
+			for(let i = 0; i < functionArray.length; i++) {
+				functionArray[i](this.score);
+			}
+		}
+	}
+
+	addOnChangeHeartListener(onChangeFunction) {
+		this.onChangeHeartListeners.push(onChangeFunction);
+	}
+
+	removeOnChangeHeartListener(onChangeFunction) {
+		let itemIndex = this.onChangeHeartListeners.indexOf(onChangeFunction);
+		if(itemIndex > -1)
+			this.onChangeHeartListeners.splice(itemIndex, 1);
+	}
+
+	addOnChangeGameOverListener(onChangeGameOverFunction) {
+		this.onChangeGameOverListeners.push(onChangeGameOverFunction);
+	}
+
+	removeOnChangeHighScoreListener(onChangeGameOverFunction) {
+		let itemIndex = this.onChangeGameOverListeners.indexOf(onChangeGameOverFunction);
+		if(itemIndex > -1)
+			this.onChangeGameOverListeners.splice(itemIndex, 1);
+	}
+
+	removeAllListeners() {
+		this.onChangeHeartListeners = [];
+		this.onChangeGameOverListeners = [];
+	}
+
+
+	setHearts(amount) {
+		let beforeCountHearts = this.countHearts;
+		this.countHearts = amount;
+		if(this.countHearts < 0)
+			this.countHearts = 0;
+		else if(this.countHearts > this.countMaxHearts)
+			this.countHearts = this.countMaxHearts;
+
+		if(beforeCountHearts !== this.countHearts)
+			this.callListener(this.onChangeHeartListeners);
+
+		if(this.countHearts === 0)
+			this.callListener(this.onChangeGameOverListeners);
+	}
+
+	setMaxHearts(amount) {
+		this.countMaxHearts = amount;
+
+		if(this.countHearts > this.countMaxHearts)
+			this.countHearts = this.countMaxHearts;
+	}
+
+	getHearts() {
+		return this.countHearts;
+	}
+
+	addHearts(amount) {
+		this.setHearts(this.countHearts + amount);
+
+	}
+
+	breakHearts(amount) {
+		this.addHearts(-1 * amount);
+	}
+
+	setScore(value) {
+		let beforeScore = this.score;
+		this.score = value;
+
+		// update score
+		if(beforeScore !== this.score)
+			this.callListener(this.onChangeHeartListeners);
+
+		// update high score
+		if(this.score > this.highScore)
+			this.callListener(this.onChangeGameOverListeners);
+	}
+
+}
+
+HeartManager.DEFAULT_MAX_COUNT		= 3;

src/game/lib/score_manager.js

@@ -4,33 +4,41 @@ class ScoreManager {
 		this.score = 0;
 		this.highScore = 0;
 
-		this.onChangeScoreFunctions = [];
-		this.onChangeHighScoreFunctions = [];
+		this.onChangeScoreListeners = [];
+		this.onChangeHighScoreListeners = [];
 	}
 
-	addOnChangeScoreFunctions(onChangeFunction) {
-		this.onChangeScoreFunctions.push(onChangeFunction);
+	callListener(functionArray) {
+		if(functionArray.length > 0) {
+			for(let i = 0; i < functionArray.length; i++) {
+				functionArray[i](this.score);
+			}
+		}
 	}
 
-	removeOnChangeScoreFunctions(onChangeFunction) {
-		let itemIndex = this.onChangeScoreFunctions.indexOf(onChangeFunction);
+	addOnChangeScoreListener(onChangeFunction) {
+		this.onChangeScoreListeners.push(onChangeFunction);
+	}
+
+	removeOnChangeScoreListener(onChangeFunction) {
+		let itemIndex = this.onChangeScoreListeners.indexOf(onChangeFunction);
 		if(itemIndex > -1)
-			this.onChangeScoreFunctions.splice(itemIndex, 1);
+			this.onChangeScoreListeners.splice(itemIndex, 1);
 	}
 
-	addOnChangeHighScoreFunctions(onChangeHighScoreFunction) {
-		this.onChangeHighScoreFunctions.push(onChangeHighScoreFunction);
+	addOnChangeHighScoreListener(onChangeHighScoreFunction) {
+		this.onChangeHighScoreListeners.push(onChangeHighScoreFunction);
 	}
 
-	removeOnChangeHighScoreFunctions(onChangeHighScoreFunction) {
-		let itemIndex = this.onChangeHighScoreFunctions.indexOf(onChangeHighScoreFunction);
+	removeOnChangeHighScoreListener(onChangeHighScoreFunction) {
+		let itemIndex = this.onChangeHighScoreListeners.indexOf(onChangeHighScoreFunction);
 		if(itemIndex > -1)
-			this.onChangeHighScoreFunctions.splice(itemIndex, 1);
+			this.onChangeHighScoreListeners.splice(itemIndex, 1);
 	}
 
-	removeAllFunctions() {
-		this.onChangeScoreFunctions = [];
-		this.onChangeHighScoreFunctions = [];
+	removeAllListeners() {
+		this.onChangeScoreListeners = [];
+		this.onChangeHighScoreListeners = [];
 	}
 
 
@@ -56,24 +64,12 @@ class ScoreManager {
 		this.score = value;
 
 		// update score
-		if(beforeScore !== this.score) {
-			if(this.onChangeScoreFunctions.length > 0) {
-				for(let i = 0; i < this.onChangeScoreFunctions.length; i++) {
-					this.onChangeScoreFunctions[i](this.score);
-				}
-			}
-		}
+		if(beforeScore !== this.score)
+			this.callListener(this.onChangeScoreListeners);
 
 		// update high score
-		if(this.score > this.highScore) {
-			this.highScore = this.score;
-
-			if(this.onChangeHighScoreFunctions.length > 0) {
-				for(let i = 0; i < this.onChangeHighScoreFunctions.length; i++) {
-					this.onChangeHighScoreFunctions[i](this.highScore);
-				}
-			}
-		}
+		if(this.score > this.highScore)
+			this.callListener(this.onChangeHighScoreListeners);
 	}
 
 }