website

website/source/assets/javascripts/lib/Chainable.js

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+(function(){
+
+var Chainable = function(engine){
+	this.engine = engine;
+	this._chain = [];
+	this._updateTimer = this._updateTimer.bind(this);
+	this._cycle = this._cycle.bind(this);
+};
+
+Chainable.prototype._running = false;
+
+Chainable.prototype._updateTimer = function(tick){
+	this._timer += tick;
+	if (this._timer >= this._timerMax) {
+		this.resetTimer();
+		this._cycle();
+	}
+};
+
+Chainable.prototype.resetTimer = function(){
+	this.engine.updateChainTimer = undefined;
+	this._timer = 0;
+	this._timerMax = 0;
+	return this;
+};
+
+Chainable.prototype.start = function(){
+	if (this._running || !this._chain.length) {
+		return this;
+	}
+	this._running = true;
+	return this._cycle();
+};
+
+Chainable.prototype.reset = function(){
+	if (!this._running) {
+		return this;
+	}
+	this.resetTimer();
+	this._timer = 0;
+	this._running = false;
+	return this;
+};
+
+Chainable.prototype._cycle = function(){
+	var current;
+	if (!this._chain.length) {
+		return this.reset();
+	}
+
+	current = this._chain.shift();
+
+	if (current.type === 'function') {
+		current.func.apply(current.scope, current.args);
+		current = null;
+		return this._cycle();
+	}
+	if (current.type === 'wait') {
+		this.resetTimer();
+		// Convert timer to seconds
+		this._timerMax = current.time / 1000;
+		this.engine.updateChainTimer = this._updateTimer;
+		current = null;
+	}
+
+	return this;
+};
+
+Chainable.prototype.then = Chainable.prototype.exec = function(func, scope, args){
+	this._chain.push({
+		type  : 'function',
+
+		func  : func,
+		scope : scope || window,
+		args  : args  || []
+	});
+
+	return this.start();
+};
+
+Chainable.prototype.wait = function(time){
+	this._chain.push({
+		type : 'wait',
+		time : time
+	});
+
+	return this.start();
+};
+
+window.Chainable = Chainable;
+
+})();