Calling filter from different JS file in Controller

Question

I have a controller that was residing in a separate file named as EmployeeCtrl.js. Inside this controller I have a filter called convertJsonDate to convert JsonResult date format to normal format MM/dd/yyyy hh:mm:ss.

My question now is, how do I make this filter reusable in different controller in the future? I have read that you can add your filter in a separate js file filters.js and inject it to your controller, but I don't know to implement this.

TIA

app.js

(function () {
'use strict';

angular.module('app', []);
})();

EmployeeCtrl.js

(function () {
'use strict';

var app = angular.module('app');

app.filter('convertJsonDate', ['$filter', function ($filter) {
    return function (input, format) {
        return (input) ? $filter('date')(parseInt(input.substr(6)), format) : '';
    };
}]);

app.controller('app.EmployeeController', ['$scope', 'app.EmployeeService', function ($scope, EmployeeService) {

    GetAllEmployee();

    $scope.sortColumnBy = function (keyname) {
        $scope.sortKey = keyname;
        $scope.reverse = !$scope.reverse;
    }

    $scope.employee = {
        employeeId: '',
        firstName: '',
        lastName: '',
        password: '',
        daysPerWeek: 0,
        active: true,
        departmentId: 0,
        accountTypeId: 0
    };

    $scope.clear = function () {
        $scope.employee.employeeId = '';
        $scope.employee.firstName = '';
        $scope.employee.lastName = '';
        $scope.employee.password = '';
        $scope.employee.daysPerWeek = 0;
        $scope.employee.active = false;
        $scope.employee.departmentId = 0;
        $scope.employee.accountTypeId = 0;
    };

    function GetAllEmployee() {
        var getEmployeeData = EmployeeService.getEmployees();

        getEmployeeData.then(function (employee) {
            $scope.employees = employee.data;
        }, function () {
            alert('Error in getting employee records');
        });
    };  
}]);

})();

Using convertJsonDate filter

<div ng-app="app">
<div ng-controller="app.EmployeeController">
     .....
     <tbody>
        <tr ng-repeat="e in employees | orderBy:sortKey:reverse | filter:searchKeyWord">
             <td>{{e.AccountDateExpired | convertJsonDate:'MM/dd/yyyy hh:mm:ss'}}</td>
        </tr>
     </tbody>
     ....
</div>
</div>

Pastebin

Index.chtml http://pastebin.com/aXDSmYAV

EmployeeCtrl.js http://pastebin.com/eQhRREPy

app.js http://pastebin.com/1GB4uhvx

Answer 1

It doesn't matter if they're in the same file or in different files. As long as both are in the same module, or the filter is in a module that you include in your dependencies, you will be able to use it.

I would suggest having 3 files here: one that declares your module, one for your controller(s), and one for your filter(s):

module.js

var app = angular.module('app', []);

filters.js

var app = angular.module('app');

app.filter('convertJsonDate', ['$filter', function ($filter) {
    return function (input, format) {
        return (input) ? $filter('date')(parseInt(input.substr(6)), format) : '';
    };
}]);

controllers.js

var app = angular.module('app');

app.controller('app.EmployeeController', ['$scope', 'app.EmployeeService', function ($scope, EmployeeService) {

    GetAllEmployee();

    $scope.sortColumnBy = function (keyname) {
        $scope.sortKey = keyname;
        $scope.reverse = !$scope.reverse;
    }

    $scope.employee = {
        employeeId: '',
        firstName: '',
        lastName: '',
        password: '',
        daysPerWeek: 0,
        active: true,
        departmentId: 0,
        accountTypeId: 0
    };

    $scope.clear = function () {
        $scope.employee.employeeId = '';
        $scope.employee.firstName = '';
        $scope.employee.lastName = '';
        $scope.employee.password = '';
        $scope.employee.daysPerWeek = 0;
        $scope.employee.active = false;
        $scope.employee.departmentId = 0;
        $scope.employee.accountTypeId = 0;
    };

    function GetAllEmployee() {
        var getEmployeeData = EmployeeService.getEmployees();

        getEmployeeData.then(function (employee) {
            $scope.employees = employee.data;
        }, function () {
            alert('Error in getting employee records');
        });
    };  
}]);

})();