app.js

angular.module('flapperNews', ['ui.router'])
    .config(['$stateProvider', '$urlRouterProvider', function ($stateProvider, $urlRouterProvider) {
        $stateProvider.state('home', {
            url: '/home',
            templateUrl: '/home.html',
            controller: 'MainCtrl'
        }).state('posts', {
            url: '/posts/{id}',
            templateUrl: '/posts.html',
            controller: 'PostsCtrl'
        });
        $urlRouterProvider.otherwise('home');
    }])
    .factory('posts', [function () {
        var o = {
            posts: []
        };
        return o;
    }])
    .controller('MainCtrl', ['$scope', 'posts', function ($scope, posts) {
        $scope.posts = posts.posts;

        $scope.addPost = function () {
            if ($scope.title === undefined || $scope.title === '') {
                return;
            }
            $scope.posts.push({
                title: $scope.title,
                link: $scope.link,
                upvotes: 0,
                comments: [
                    {author: 'Joe', body: 'Cool post!', upvotes: 0},
                    {author: 'Bob', body: 'Great idea but everything is wrong!', upvotes: 0}
                ]
            });
            $scope.title = '';
            $scope.link = '';
        };

        $scope.incrementUpvotes = function (post) {
            post.upvotes += 1;
        };


    }])
    .controller('PostsCtrl', ['$scope', '$stateParams', 'posts', function ($scope, $stateParams, posts) {
        $scope.post = posts.posts[$stateParams.id];

        $scope.addComment = function () {
            if ($scope.body === undefined || $scope.body === '') {
                return;
            }
            $scope.post.comments.push({
                body: $scope.body,
                author: 'user',
                upvotes: 0
            });
            $scope.body = '';
        };
    }]);