Add contributor and kredits count to page

app/controllers/index.js

@@ -0,0 +1,20 @@
+import Ember from 'ember';
+
+const {
+  computed
+} = Ember;
+
+export default Ember.Controller.extend({
+
+  contributorsCount: computed('model.contributors.[]', function() {
+    return this.get('model.contributors').length;
+  }),
+
+  kreditsSum: computed('model.contributors.[]', function() {
+    let kredits = this.get('model.contributors').mapBy('kredits');
+    return kredits.reduce(function(previousValue, currentValue) {
+      return currentValue + previousValue;
+    });
+  })
+
+});

app/styles/app.scss

@@ -21,6 +21,7 @@ $font-family-sans: 'Open Sans', sans-serif;
 body {
   background-image: url('/img/bg.jpg');
   background-repeat: none;
+  background-attachment: fixed;
   font-family: $font-family-sans;
   font-size: 16px;
   font-weight: 300;
@@ -47,6 +48,20 @@ section {
       font-size: 2rem;
     }
   }
+
+  &#contributors {
+    .content {
+      p.stats {
+        padding-top: 2rem;
+        font-size: 1rem;
+        color: lightblue;
+        text-align: center;
+        span.number {
+          font-weight: 600;
+        }
+      }
+    }
+  }
 }
 
 @import "components/contributor-list";

app/templates/index.hbs

@@ -6,6 +6,11 @@
 
   <div class="content">
     {{contributor-list contributors=model.contributors}}
+
+    <p class="stats">
+      <span class="number">{{kreditsSum}}</span> kredits issued and distributed among
+      <span class="number">{{contributorsCount}}</span> contributors.
+    </p>
   </div>
 
 </section>

tests/unit/controllers/index-test.js

@@ -0,0 +1,25 @@
+import { moduleFor, test } from 'ember-qunit';
+
+moduleFor('controller:index', 'Unit | Controller | index');
+
+let addFixtures = function(controller) {
+  controller.set('model', { contributors: [
+    { github_username: "neo", github_uid: "318", kredits: 10000 },
+    { github_username: "morpheus", github_uid: "843", kredits: 15000 },
+    { github_username: "mouse", github_uid: "842", kredits: 5000 },
+  ]});
+};
+
+test('#contributorsCount returns number of contributors', function(assert) {
+  let controller = this.subject();
+  addFixtures(controller);
+
+  assert.equal(controller.get('contributorsCount'), 3);
+});
+
+test('#kreditsSum returns the sum of all kredits', function(assert) {
+  let controller = this.subject();
+  addFixtures(controller);
+
+  assert.equal(controller.get('kreditsSum'), 30000);
+});