Initial commit

app/scripts/models/total.js

@@ -0,0 +1,54 @@
+'use strict';
+
+define([
+  'backbone',
+  'backbone-mediator',
+  'libs/math',
+  'libs/airports',
+  'config'
+], function (Backbone, BackboneMediator, Math, airports, config) {
+  var Result = Backbone.Model.extend({
+    defaults: {
+      dist: 0,
+      total: 0,
+      rawTotal: 0,
+      alone: true,
+      roundtrip: false,
+      passengers: 1,
+      price: 0
+    },
+    initialize: function () {
+      Backbone.Mediator.subscribe('roundtrip:change', this.set.bind(this, 'roundtrip'));
+      Backbone.Mediator.subscribe('passengers:change', this.set.bind(this, 'passengers'));
+      Backbone.Mediator.subscribe('passengers:change', function (num) {
+        this.set('alone', num === 1);
+      }.bind(this));
+
+      this.on('change:roundtrip change:passengers', this.calc, this);
+    },
+    reset: function () {
+      this.set('dist', 0);
+      this.set('total', 0);
+      this.set('rawTotal', 0);
+      this.set('price', 0);
+    },
+    calc: function () {
+      var mult = this.get('roundtrip') ? 2 : 1;
+      this.set('total', mult * this.get('passengers') * this.get('rawTotal'));
+      this.set('price', this.get('total') / 1000 * config.priceCO2);
+    },
+    add: function (another) {
+      var keys = {
+        'dist': 'dist',
+        'total': 'rawTotal'
+      };
+      for (var i in keys) {
+        this.set(keys[i], this.get(keys[i]) + another.get(i));
+      }
+
+      this.calc();
+    }
+  });
+
+  return Result;
+});