Add: ScoreManager, ScoreBoard

src/game/lib/score_manager.js

@@ -0,0 +1,79 @@
+class ScoreManager {
+
+	constructor() {
+		this.score = 0;
+		this.highScore = 0;
+
+		this.onChangeScoreFunctions = [];
+		this.onChangeHighScoreFunctions = [];
+	}
+
+	addOnChangeScoreFunctions(onChangeFunction) {
+		this.onChangeScoreFunctions.push(onChangeFunction);
+	}
+
+	removeOnChangeScoreFunctions(onChangeFunction) {
+		let itemIndex = this.onChangeScoreFunctions.indexOf(onChangeFunction);
+		if(itemIndex > -1)
+			this.onChangeScoreFunctions.splice(itemIndex, 1);
+	}
+
+	addOnChangeHighScoreFunctions(onChangeHighScoreFunction) {
+		this.onChangeHighScoreFunctions.push(onChangeHighScoreFunction);
+	}
+
+	removeOnChangeHighScoreFunctions(onChangeHighScoreFunction) {
+		let itemIndex = this.onChangeHighScoreFunctions.indexOf(onChangeHighScoreFunction);
+		if(itemIndex > -1)
+			this.onChangeHighScoreFunctions.splice(itemIndex, 1);
+	}
+
+	removeAllFunctions() {
+		this.onChangeScoreFunctions = [];
+		this.onChangeHighScoreFunctions = [];
+	}
+
+
+	getScore() {
+		return this.score;
+	}
+
+	getHighScore() {
+		return this.highScore;
+	}
+
+
+	plusScore(amount) {
+		this.setScore(this.score + amount);
+	}
+
+	minusScore(amount) {
+		this.plusScore(-1 * amount);
+	}
+
+	setScore(value) {
+		let beforeScore = this.score;
+		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);
+				}
+			}
+		}
+
+		// 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);
+				}
+			}
+		}
+	}
+
+}