Is there a way to call and update an Angular controller's $scope from external sources?

Question

Is there a way to call and update an Angular controller's $scope from external sources?

function in controller:

$scope.updateData = function () {
            Words.fetch('update', $scope.randNum)
                .error(function (data) {
                    console.log('update error: ' + data.message);
                })
                .success(function (data) {
                    $scope.board = data.settings.board;
                    $scope.tray = data.tray;
                    $scope.scores = data.pointsPerLetter;
                    $scope.totalScore = data.score.total;
                    console.log('update: ' + $scope.tray);
                })
        }

and the service function:

angular.module('wordService', [])
    .factory('Words', function ($http) {
        var id;
        return {
            fetch: function (call, num) {
                id = num;
                return $http.get('http://xxxxx');
            },
            sendUpdate: function (call, data) {
                console.log('send update: ' + data)
                return $http.post('http://xxxxx' + call, data);
            }
        }
    });

Instead of using

ngAccess = angular.element(document.getElementById('ws')).scope();

to call ngAccess.updateData() or $scope.updateData

How can I incorporate this functionality within a service for easy access when needed, while still being able to update the scope from the controller? The current method is not compatible with browserify and does not have access to the scope yet.

Scenario: I want to click a button that triggers a function to update the scope. Note: The button is displayed on a canvas element. (shouldn't affect functionality as event listeners are still present).

Thank you in advance for your help!

javascript angularjs controller angularjs-scope

Answer 1

Answer №1

Transfer the data object to the service and assign a reference to a controller scope variable...

Your factory could be structured as follows:

.factory('Words', function ($http) {
    var id;
    var results = {};

    var get = function (call, num) {
        id = num;
        return $http.get('http://xxxxx').then(function(response){
            results.board = response.data.settings.board;
            results.tray = response.data.tray;
            results.scores = response.data.pointsPerLetter;
            results.totalScore = response.data.score.total;
        };
    };

    var send = function (call, data) {
        console.log('send: ' + data)
        return $http.post('http://xxxxx' + call, data);
    };

    return {
        get: get,
        send: send,
        results: results
    }
});

Meanwhile, your controller might appear like this:

.controller(function($scope, Words){
    $scope.words = Words.results;
    $scope.init = function () {
        Words.get('init', $scope.randNum).then(function(){
            console.log($scope.words); // should log the desired data
        }, function(response){ console.log(response)});
    };
    
    $scope.init(); 
})

Note that I have refactored your factory slightly to implement the revealing module pattern for better organization and ease of use. This structure allows you to make internal calls to your functions as well as external ones.

Now, you can add a button anywhere in the application without direct prototypical inheritance from the controller's scope. For instance, this directive would trigger a call and update the results accordingly, reflecting changes in the controller scope variable:

.directive('update', function(Words){
    return function(scope) {
        scope.update = function(){
            Words.get('update', 'somevalue')
        }
    }
})

This directive can be placed in the view like so:

<button update ng-click="update()">Update</button>

Answer 2

Transfer the data object to the service and assign a reference to a controller scope variable...

Your factory could be structured as follows:

.factory('Words', function ($http) {
    var id;
    var results = {};

    var get = function (call, num) {
        id = num;
        return $http.get('http://xxxxx').then(function(response){
            results.board = response.data.settings.board;
            results.tray = response.data.tray;
            results.scores = response.data.pointsPerLetter;
            results.totalScore = response.data.score.total;
        };
    };

    var send = function (call, data) {
        console.log('send: ' + data)
        return $http.post('http://xxxxx' + call, data);
    };

    return {
        get: get,
        send: send,
        results: results
    }
});

Meanwhile, your controller might appear like this:

.controller(function($scope, Words){
    $scope.words = Words.results;
    $scope.init = function () {
        Words.get('init', $scope.randNum).then(function(){
            console.log($scope.words); // should log the desired data
        }, function(response){ console.log(response)});
    };
    
    $scope.init(); 
})

Note that I have refactored your factory slightly to implement the revealing module pattern for better organization and ease of use. This structure allows you to make internal calls to your functions as well as external ones.

Now, you can add a button anywhere in the application without direct prototypical inheritance from the controller's scope. For instance, this directive would trigger a call and update the results accordingly, reflecting changes in the controller scope variable:

.directive('update', function(Words){
    return function(scope) {
        scope.update = function(){
            Words.get('update', 'somevalue')
        }
    }
})

This directive can be placed in the view like so:

<button update ng-click="update()">Update</button>

Is there a way to call and update an Angular controller's $scope from external sources?

Answer №1

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