Add: HeartManager, HeartGauge

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;