a.rb

'use strict';

app.controller('TodoCtrl', function($scope, $timeout, $ionicModal, Projects, $firebase, $ionicLoading) {

  // Load projects
  var projectsUrl = "https://ionic-guide-harry.firebaseio.com/projects/";
  var projectRef = new Firebase(projectsUrl);

  // query firebase for keys to projects
  projectRef.on('value', function(snapshot) {

    if(snapshot.val() === null) {
      console.log('projects location not accessible');
    } else {

      $scope.projectKeys = Object.keys(snapshot.val());

      // grab the last active or the first project
      var firebaseKeyRegEx = /^-[A-Za-z0-9]{19}$/;
      var lastActiveProjectKey = Projects.getLastActiveKey();

      if (firebaseKeyRegEx.test(lastActiveProjectKey)) {

        // if the stored key matchs firebase format
        $scope.activeProject = $scope.projects.$child(lastActiveProjectKey);
      } else {

        // else pick the first project available
        $scope.activeProject = $scope.projects.$child($scope.projectKeys[0]);
      }
    }
  });

  // load activeProject tasks
  var loadTasksFromKey = function(projectKey) {
    var activeProjectTasksUrl = projectsUrl + projectKey + "/tasks/";
    var tasksRef = new Firebase(activeProjectTasksUrl);

    tasksRef.on('value', function(snapshot) {
      if(snapshot.val() === null) {
        console.log('tasks location not accessible');
      } else {
        $scope.taskKeys = Object.keys(snapshot.val());
        $scope.activeTasks = $firebase(tasksRef);
      }
    });
  };
  loadTasksFromKey(Projects.getLastActiveKey());

  // 3-way bind projects variable
  $scope.projects = $firebase(projectRef);
  $scope.loading = $ionicLoading.show({
    content: 'Loading',
    animation: 'fade-in',
    showBackdrop: true,
    maxWidth: 200,
    showDelay: 500
  });
  $scope.projects.$on("loaded", function() {
    // tasks that need to be run once projects are loaded
    $scope.loading.hide();
  });

  // utility function for creating a new project with the given projectTitle
  var createProject = function(projectTitle) {
    var newProject = Projects.newProject(projectTitle);

    // add project to firebase projects, upon success select it by key
    $scope.projects.$add(newProject).then( function(ref) {
      $scope.selectProject(ref.name());
    });
  };

  // Creates a new project
  $scope.newProject = function() {
    var projectTitle = prompt('Project name');
    if(projectTitle) {
      createProject(projectTitle);
    }
  };

  // Selects the given project by it's firebase key
  $scope.selectProject = function(key) {
    $scope.activeProject = $scope.projects.$child(key);
    loadTasksFromKey(key);
    Projects.setLastActiveKey(key);
    $scope.sideMenuController.close();
  };

  // Create our modal
  $ionicModal.fromTemplateUrl('new-task.html', function(modal) {
    $scope.taskModal = modal;
    }, {
    scope: $scope
  });

  $scope.createTask = function(task) {
    if(!$scope.activeProject || !task) {
      return;
    }
    $scope.activeProject.$child('tasks').$add({
      title: task.title,
      finished: false
    });
    $scope.taskModal.hide();

    // reset task title
    task.title = "";
  };

  $scope.newTask = function() {
    $scope.taskModal.show();
  };

  $scope.closeNewTask = function() {
    $scope.taskModal.hide();
  };

  $scope.toggleProjects = function() {
    $scope.sideMenuController.toggleLeft();
  };

  $scope.toggleTask = function(key) {
    console.log($scope.activeTasks.$child(key));
    if($scope.activeTasks.$child(key).finished) {
      $scope.activeTasks.$child(key).finished = !$scope.activeTasks.$child(key).finished;
    } else {
      $scope.activeTasks.$child(key).finished = 'true';
    }
    console.log($scope.activeTasks.$child(key)['finished']);
  };


  // Try to create the first project, make sure to defer
  // this by using $timeout so everything is initialized
  // properly
  //$timeout(function() {
  //  if($scope.projects.length == 0) {
  //    while(true) {
  //      var projectTitle = prompt('Your first project title:');
  //      if(projectTitle) {
  //        createProject(projectTitle);
  //        break;
  //      }
  //    }
  //  }
  //});

});