Transfer the $rootScope parameter to a named function within the factory

Question

Transfer the $rootScope parameter to a named function within the factory

I'm currently working on an application that has been highly modularized. Within this app, there is a factory responsible for sending notifications to a controller from another module. To accomplish this, I am utilizing the $rootScope object to trigger an event called newNotification and pass along the necessary data.

Everything is functioning as expected with the code provided below:

notifications.factory.js

(function() {
    'use strict';

    function notificationsFactory($rootScope) {
        return {
            sendNotification: function(data) {
                switch(data.type) {
                    case 'actors':
                        $rootScope.$broadcast('newNotification', data);
                        break;
                    .....
                }
            } 
        }
    };

    angular.module('features.notifications.factory', [])
    .factory('notificationsFactory', ['$rootScope', notificationsFactory]);
})();

However, I would like to create a cleaner factory by returning an object with named functions since more functions will be added in the future. Essentially, I want it to look something like this:

notifications.factory.js

(function() {
    'use strict';

    function notificationsFactory($rootScope) {
        return {
            sendNotification: sendNotification
        }
    };

    function sendNotification(data) {
        switch(data.type) {
            case 'actors':
                $rootScope.$broadcast('newNotification', data);
                break;
            ....
        }
    };

    angular.module('features.notifications.factory', [])
    .factory('notificationsFactory', ['$rootScope', notificationsFactory]);
})();

The issue arises when the $rootScope object is not defined within the sendNotification function, which is understandable. I am currently struggling to find a solution to this problem.

I have searched online for a potential solution, but expressing the complexity of the issue without incorporating some code makes it challenging. Hence, my post requesting assistance.

Thank you for your help and understanding :)

javascript angularjs

Answer 1

Answer №1

When opting for a service over a factory, you have the ability to transfer injected dependencies using this. Utilizing a service in this manner becomes even more convenient when leveraging ES6 classes, and helps in preparing you slightly more for Angular 2.0.

(function() {
    'use strict';

    function NotificationsService($rootScope) {
        this.$rootScope = $rootScope;
    };

    NotificationsService.prototype.sendNotification = function sendNotification(data) {
        switch(data.type) {
            case 'actors':
                this.$rootScope.$broadcast('newNotification', data);
                break;
            ....
        }
    };

    angular.module('features.notifications.service', [])
    .service('NotificationsService', ['$rootScope', NotificationsService]);
})();

ES6 Version:

(function() {
    'use strict';

    class NotificationsService {
        constructor($rootScope) {
            this.$rootScope = $rootScope;
        }

        sendNotification(data) {
            switch(data.type) {
                case 'actors':
                    this.$rootScope.$broadcast('newNotification', data);
                    break;
                ....
            }
        }
    }

    angular.module('features.notifications.service', [])
    .service('NotificationsService', ['$rootScope', NotificationsService]);
})();

Answer 2

When opting for a service over a factory, you have the ability to transfer injected dependencies using this. Utilizing a service in this manner becomes even more convenient when leveraging ES6 classes, and helps in preparing you slightly more for Angular 2.0.

(function() {
    'use strict';

    function NotificationsService($rootScope) {
        this.$rootScope = $rootScope;
    };

    NotificationsService.prototype.sendNotification = function sendNotification(data) {
        switch(data.type) {
            case 'actors':
                this.$rootScope.$broadcast('newNotification', data);
                break;
            ....
        }
    };

    angular.module('features.notifications.service', [])
    .service('NotificationsService', ['$rootScope', NotificationsService]);
})();

ES6 Version:

(function() {
    'use strict';

    class NotificationsService {
        constructor($rootScope) {
            this.$rootScope = $rootScope;
        }

        sendNotification(data) {
            switch(data.type) {
                case 'actors':
                    this.$rootScope.$broadcast('newNotification', data);
                    break;
                ....
            }
        }
    }

    angular.module('features.notifications.service', [])
    .service('NotificationsService', ['$rootScope', NotificationsService]);
})();

Answer 3

Answer №2

Implement the sendAlert-method within your alertsFactory- factory:

function alertsFactory($rootScope) {
    function sendAlert(message) {
        switch(message.level) {
            case 'error':
                $rootScope.$broadcast('newAlert', message);
                break;
            ....
        }
      };
      return {
          sendAlert: sendAlert
      }
    };

Alternatively, you can use a service instead of a factory and structure it like this:

function alertsFactory($rootScope) {
    this.sendAlert = function(message) {
        switch(message.level) {
            case 'error':
                $rootScope.$broadcast('newAlert', message);
                break;
            ....
        }
      };
    };

Answer 4

Implement the sendAlert-method within your alertsFactory- factory:

function alertsFactory($rootScope) {
    function sendAlert(message) {
        switch(message.level) {
            case 'error':
                $rootScope.$broadcast('newAlert', message);
                break;
            ....
        }
      };
      return {
          sendAlert: sendAlert
      }
    };

Alternatively, you can use a service instead of a factory and structure it like this:

function alertsFactory($rootScope) {
    this.sendAlert = function(message) {
        switch(message.level) {
            case 'error':
                $rootScope.$broadcast('newAlert', message);
                break;
            ....
        }
      };
    };

Transfer the $rootScope parameter to a named function within the factory

Answer №1

Answer №2

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