Constructor functions the "Angular way" (slightly opinionated)

gistfile1.txt

// Factory is a great place to keep the constructor and instance methods
app.factory('User', function() {
    function User(username, email) {
        this.username = username;
        this.email = email;
    }
    User.prototype = {
    	printUser: function() {
    	    console.log(this.username);
    	},
    };
    return(User);
});



// Service to act as a layer, great place for computations beyond getters/setters, ajax calls, etc
// DI works great, passing in the User "class"
app.service('UserService', ['User', function(User) {
    this.getUser = function(username, email) {
        // Create an instance like you would normally (with constructor) -- can skip this layer entirely
        // if you want to just inject the User factory directly into the controller/directive
        var userObj = new User(username, email);
    	return userObj;
    };
}]);



// Calling it from anywhere in the app
// Pass in the services
app.controller('HomeCtrl', ['$scope', 'UserService', function($scope, UserService) {

    var john = UserService.getUser("john69", "john@email.com");
    john.printUser(); // prints "john69" in console
    
    //or
        
    $scope.john = UserService.getUser("john69", "john@email.com");
    $scope.john.printUser(); // prints "john69" in console
    
}]);