Angular method to handle Campaign Monitor's secure subscribe link signup

campaign-monitor-angular.html

<form name="newsletterSignupForm" novalidate ng-submit='submitEmail()'>	
	<input ng-model="emailAddress" type="email" placeholder="[email protected]" required />
	<div class="checkbox">
		<input type="checkbox" ng-model="acceptTerms" name="acceptTerms" required />
		<div class="checkbox-label">I’ve read and accept the <a href="/terms" target="_blank">TOS and Privacy Policy</a>. </div> 
	</div>
	<button ng-disabled="!newsletterSignupForm.$valid" type="submit" ng-bind="subscribeText"></button>
</form>

campaign-monitor-angular.js

// This is the long data-id from the form element
var id = '';

// This is the name of the email input element
var email_name = 'cm-';

var submitEmailPartTwo = function(secureUrl, email){
	$http({
		method: 'POST',
		url: secureUrl,
		headers: {
			"Content-type" : "application/x-www-form-urlencoded"
		},
		transformRequest: function() {
			return email_name+"="+email;
		}
	}).then(function successCallback(response) {
		$scope.subscribeText = 'Thanks!';
		$timeout(function() {
			$scope.subscribeText = 'Subscribe';
		}, 5000);
	}, function errorCallback(response) {
		$scope.subscribeText = 'Error!';
		$timeout(function() {
			$scope.subscribeText = 'Subscribe';
		}, 5000);
	});
}

var submitEmailPartOne = function(email){
	$http({
		method: 'POST',
		url: 'https://createsend.com//t/getsecuresubscribelink',
		headers: {
			"Content-type" : "application/x-www-form-urlencoded"
		},
		transformRequest: function(obj) {
			var str = [];
			for(var p in obj){
				str.push(encodeURIComponent(p) + "=" + encodeURIComponent(obj[p]));
			}
			return str.join("&");
		},
		data: {
			'email': email,
			'data': id
		}
	}).then(function successCallback(response) {
		submitEmailPartTwo(response.data, email);
	}, function errorCallback(response) {
		$scope.subscribeText = 'Error!';
		$timeout(function() {
			$scope.subscribeText = 'Subscribe';
		}, 5000);
	});
}

$scope.submitEmail = function() {
	$scope.subscribeText = 'Please Wait...';
	submitEmailPartOne($scope.emailAddress);
};