Utilize the ionicPlatform.ready() method for implementing a service factory

Within my app.js file, I have the following method:

  .run(function($ionicPlatform) {
     $ionicPlatform.ready(function() {

        gvi.Notifications.registerForPush(MessagesService.onNotificationResponse);

     });
  })

Additionally, I have a factory defined as:

  .factory('MessagesService', function($scope, $q) {

var messages = [];

    return {

  onNotificationResponse: function(sender, message, msgId, msgType, msgUrl) {
        console.log("myApp.onNotificationResponse:" + message + " msgUrl:" + msgUrl);

        $scope.messages.push({
          sender: sender,
          message: message,
          msgId: msgId,
          msgType: msgType,
          msgUrl: msgUrl
        });

      MessagesService.save($scope.messages);

    },
  }
 })

Upon opening the app, I am encountering the following error:

  Uncaught ReferenceError: MessagesService is not defined

How can I successfully utilize the MessagesService factory within the ionicPlatform.ready function?

UPDATE:

The error regarding MessagesService has been resolved. Now, how can I incorporate the use of $scope within the factory?

Answer №1

It seems that you have forgotten to include the MessageService dependency in your run method.

.run(function($ionicPlatform,MessagesService) {
     $ionicPlatform.ready(function() {

        gvi.Notifications.registerForPush(MessagesService.onNotificationResponse);

     });
  })

Update: To meet your requirements, it is recommended to refactor your service as services cannot refer to scope directly. Instead, your service should expose the message array to the scope, rather than using the one defined on scope.

 .factory('MessagesService', function($scope, $q) {

var messages = [];

    return {

  onNotificationResponse: function(sender, message, msgId, msgType, msgUrl) {
        console.log("myApp.onNotificationResponse:" + message + " msgUrl:" + msgUrl);

        messages.push({
          sender: sender,
          message: message,
          msgId: msgId,
          msgType: msgType,
          msgUrl: msgUrl
        });

      MessagesService.save(messages);

    },
    messages:messages
  }
 })

You can now use the messages collection in any controller by accessing the MessageService.messages property.

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