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gaia/apps/camera/js/controllers/countdown.js

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+define(function(require, exports, module) {
+'use strict';
+
+/**
+ * Dependencies
+ */
+
+var debug = require('debug')('controller:countdown');
+var CountdownView = require('views/countdown');
+var bindAll = require('lib/bind-all');
+
+/**
+ * Exports
+ */
+
+module.exports = function(app) { return new CountdownController(app); };
+module.exports.CountdownController = CountdownController;
+
+/**
+ * Create a new `CountdownController`
+ *
+ * @param {App} app
+ */
+function CountdownController(app) {
+  bindAll(this);
+  this.app = app;
+  this.view = app.views.countdown || new CountdownView(); // test hook
+  this.view.appendTo(app.el);
+  this.bindEvents();
+  debug('initialized');
+}
+
+/**
+ * Connects the countdown view
+ * with the app via events.
+ *
+ * @private
+ */
+CountdownController.prototype.bindEvents = function() {
+  this.app.on('countdown:started', this.start);
+  this.app.on('countdown:tick', this.update);
+  this.app.on('countdown:ended', this.clear);
+};
+
+CountdownController.prototype.start = function(seconds) {
+  this.update(seconds);
+  this.view.show();
+  debug('started');
+};
+
+CountdownController.prototype.update = function(seconds) {
+  if (seconds < 1) { seconds = ''; }
+  var immanent = seconds <= 3;
+
+  this.view
+    .set(seconds)
+    .setImmanent(immanent);
+
+  if (immanent && seconds > 0) { this.app.emit('countdown:immanent'); }
+};
+
+CountdownController.prototype.clear = function() {
+  this.view.hide(this.view.reset);
+};
+
+});