AngularJs Controller - take input value, pass to factory to process, then display results

The code works fine for me

Take a look at this sample which is made up of the code you posted

HTML

    <h3>Test 5, Factory user </h3>
    <div ng-controller="Ctrl">
        <input ng-init="role='MyAdmin'" ng-model="role">
        <label>{{message}}</label>
    </div>

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Angular

<script>
(function() {
	'use strict';
	var app = angular.module("TestApp",[]);

	app.factory('user', ['$http', '$window', '$log', function ($http, $win, $log) {
		var urlBase = '/ee';
		$log.log('user');
		var getData = function (role) {
			return $http.get(urlBase + '/t2940.php?role=' + role)
				.then(function (response) {
					return response.data
				})

		};
		return {
			getRole: getData
		};
	}]);

	app.controller('Ctrl', ['$scope', '$log', 'user', function ($scope, $log, user) {
		user.getRole().then(function (role) {
			$scope.message = role;
		});
	}]);
})();
</script>

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Test API

<?php
echo "Test";

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Working sample here
EDIT:
Removed the alert as this was just confusing the issue. No parameter is being passed to the getData() function so the alerat will always show undefined.

Hi Julian Hansen,

Thank you for looking into the issue and prompt response

However, getting undefined is not right. Why there is no parameter passed? how to get the parameter to pass? That is the problem I try to solve.
Whatever in the input textbox e.g. "MyAdmin", "MyUser1", "MyUser2".etc, I want to get them checked by the factory, if they are Admin, then return true, otherwise return false.

I don't follow you?

How must the factory test the value? Does it need to call a server script to do this or is there some rule it must check internally?

I am not clear on what you are wanting here?

Why there is no parameter passed? how to get the parameter to pass? That is the problem I try to solve.

Let's look at this code. Where in the getRole() call is there a parameter?

app.controller('Ctrl', ['$scope', '$log', 'user', function ($scope, $log, user) {
    user.getRole().then(function (role) {
        $scope.message = role;
    });
}]);

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If you want to pass role to the factory you need to do this

app.controller('Ctrl', ['$scope', '$log', 'user', function ($scope, $log, user) {
    user.getRole($scope.role).then(function (role) {
        $scope.message = role;
    });
}]);

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However, this will still get you undefined because you are using ng-init on your control rather than initialising your scope in the controller.
Update your control to this

<input ng-model="role">

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And your controller to this

	app.controller('Ctrl', ['$scope', '$log', 'user', function ($scope, $log, user) {
		$scope.role = 'MyAdmin'
		user.getRole($scope.role).then(function (role) {
			$scope.message = role;
		});
	}]);

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Updated sample here