[Membership 2 Pro] - Notifications Preview

ms-preview-notification.php

<?php
/*
Plugin Name: [Membership 2 Pro] - Notifications Preview
Plugin URI: https://premium.wpmudev.org/
Description: Adds an option in notifications settings page to send a test email
Author: Panos Lyrakis @ WPMUDEV
Author URI: https://premium.wpmudev.org/
License: GPLv2 or later
*/

if ( ! defined( 'ABSPATH' ) ) {
	exit;
}

if ( ! class_exists( 'WPMUDEV_MS_Notification_Preview' ) ) {

	class WPMUDEV_MS_Notification_Preview {

		private static $_instance = null;		

		public static function get_instance() {

			if( is_null( self::$_instance ) ){
				self::$_instance = new WPMUDEV_MS_Notification_Preview();
			}
			return self::$_instance;

		}

		private function __construct() {

			add_action( 'admin_footer', array( $this, 'insert_preview_field' ), 10 );
			add_action( 'wp_ajax_ms_preview_notification', array( $this, 'ajax_send_preview_notification' ) );
			add_filter( 'ms_model_communication_get_comm_vars', array( $this, 'filter_comm_vars' ), 10, 2 );
		}


		public function filter_comm_vars( $comm_vars, $member ){

			if( ! wp_doing_ajax() || ! isset( $_POST[ 'action' ] ) || $_POST[ 'action' ] != 'ms_preview_notification' ){
				return $comm_vars;
			}

			if( isset( $_POST[ 'membership_id' ] ) ){
				$membership_id = intval( $_POST[ 'membership_id' ] );
				$membership = MS_Factory::load( 'MS_Model_Membership', $membership_id );
				$days = 10; // We like number 10 :)
				
				$comm_vars[ '%ms-name%' ] 						= $membership->name;
				$comm_vars[ '%ms-description%' ] 				= $membership->description;
				$comm_vars[ '%ms-remaining-days%' ] 			= sprintf(
																	__( '%s day%s', 'membership2' ),
																	$days,
																	abs( $days ) > 1 ? 's': ''
																);
				$comm_vars[ '%ms-remaining-trial-daysn%' ] 			= sprintf(
																	__( '%s day%s', 'membership2' ),
																	$days,
																	abs( $days ) > 1 ? 's': ''
																);
				$comm_vars[ '%ms-expiry-date%' ] 				= date( 'Y-m-d', strtotime("+10 days") ); //date( 'D, d F Y', strtotime("+10 days") );
				//$comm_vars[ '%ms-invoice%' ] : We need a subscription
			}

			return $comm_vars;
		}

		public function ajax_send_preview_notification(){

			check_ajax_referer( 'ms-preview-notification', 'security' );

			$recipient = sanitize_text_field( $_POST['destination_email'] );
			$return = array();

			if( ! is_email( $recipient ) ){
				$return = array(
					'success'	=> 0,
					'message'	=> __( 'Invalid recipient email address', 'membership2' )
				);

				wp_send_json( $return );
			}

			$comm_type = sanitize_text_field( $_POST['comm_type'] );
			$subject = '[PREVIEW] - ' . sanitize_text_field( $_POST[ 'subject' ] );
			$member = MS_Factory::load( 'MS_Model_Member', get_current_user_id() );
			$MS_Model_Communication = new MS_Model_Communication;
			$comm_vars = $MS_Model_Communication->get_comm_vars( null, $member );
			
			$args = array(
				'post_type' 		=> MS_Model_Communication::get_post_type(),
				'post_status' 		=> 'any',
				'fields' 			=> 'ids',
				'posts_per_page' 	=> 1,
				'meta_query' 		=> array(
						array(
							'key' 		=> 'type',
							'value' 	=> $comm_type,
							'compare' 	=> '=',
						),
				),
			);

			MS_Factory::select_blog();
			$query = new WP_Query( $args );
			$items = $query->posts;
			MS_Factory::revert_blog();

			if ( 1 == count( $items ) ) {
				$comm_id = $items[0];
			}

			$communication_post = get_post( $comm_id );

			$message 		= str_replace(
				array_keys( $comm_vars ),
				array_values( $comm_vars ),
				stripslashes( $communication_post->post_content )
			);

			$subject 		= str_replace(
				array_keys( $comm_vars ),
				array_values( $comm_vars ),
				stripslashes( $subject )
			);
			$subject 		= strip_tags( $subject );

			$content_type 	= $MS_Model_Communication->get_mail_content_type();
			$headers[] 		= sprintf(
				'Content-Type: %s; charset="UTF-8"',
				$content_type
			);

			$admin_emails = MS_Model_Member::get_admin_user_emails();
			if ( ! empty( $admin_emails[0] ) ) {
				$headers[] = sprintf(
					'From: %s <%s> ',
					get_option( 'blogname' ),
					$admin_emails[0]
				);
			}

			// Final step: Allow customization of all email parts.
			$recipient 	= apply_filters(
				'ms_model_communication_send_preview_message_recipients',
				$recipient
			);
			$message 		= apply_filters(
				'ms_model_communication_send_preview_message_contents',
				$message
			);
			$subject 		= apply_filters(
				'ms_model_communication_send_preview_message_subject',
				$subject
			);
			$headers 		= apply_filters(
				'ms_model_communication_send_preview_message_headers',
				$headers
			);

			/*
			 * Send the mail!
			 * wp_mail will not throw an error, so no error-suppression/handling
			 * is required here. On error the function response is FALSE.
			 */
			$sent = wp_mail( $recipient, $subject, $message, $headers );

			if( ! $sent ){

				$return = array(
					'success'	=> 0,
					'message'	=> __( 'Something went wrong and could not send test email', 'membership2' )
				);
				
			}
			else{
				$return = array(
					'success'	=> 1,
					'message'	=> __( 'Preview email was sent!', 'membership2' )
				);
			}

			wp_send_json( $return );

		}


		public function insert_preview_field(){

			$screen = get_current_screen();

			if( 'membership-2_page_membership2-settings' != $screen->id ){
				return;
			}

			$all_memberships = MS_Model_Membership::get_memberships();
			$memberships_options = '';

			foreach ( $all_memberships as $membership ) {
				$memberships_options .= '<option value="' . $membership->id . '">' . $membership->name . '</option>';
			}

			?>
			<script type="text/javascript">
				(function($){

					var MS_Preview_Notification = {

						title_text: 'Send Preview email',

						label_text_email: 'Insert destination email',

						label_text_membership: 'Select a membership',

						button_text: 'Send',

						warning_email_text: 'Please check your destination email',

						place: $('.ms-editor-form #cc_email'),

						nonce: '<?php echo wp_create_nonce( "ms-preview-notification" ); ?>',

						comm_type: '<?php echo isset( $_GET['comm_type'] ) ? $_GET['comm_type'] : ''; ?>',

						all_memberships : '<?php echo $memberships_options; ?>',

						create_preview_field: function(){

							var cc_email = $( '#cc_email' ).val();

							var field = $( '<div/>',{
								"class": 'ms-email-preview',
								'style': 'border: 2px solid #f3f3f3; padding: 10px;'
							} );

							var title = $( '<span/>', {
								"class": 'ms-email-preview-title',
								text: this.title_text,
								"style": 'font-weight: bold'
							});

							var email_label = $( '<label/>', {
								"class": 'ms-email-preview-emaillabel',
								text: this.label_text_email,
								"style": 'display: inline-block;'
							});

							var membership_label = $( '<label/>', {
								"class": 'ms-email-preview-membershiplabel',
								text: this.label_text_membership,
								"style": 'display: inline-block;'
							});


							var input = $( '<input/>', {
								"class": 'ms-email-preview-input',
								type: 'text',
								value: cc_email,
								"style": 'margin-left: 10px'
							});

							var select_membership = $( '<select/>',{
								"class": 'ms-email-preview-membership'								
							}).append( this.all_memberships );

							var button = $( '<a/>', {
								"class": 'ms-email-preview-button button-primary',
								text: this.button_text,
								"style": 'margin-left: 10px; text-align: center;'
							});

							field.append( title );
							email_label.append( input );//.append( button );
							membership_label.append( select_membership )
							field.append( email_label ).append( membership_label ).append( button );
							//field.append( email_label ).append( button );

							return field;
						},

						insert_preview_field: function(){
							this.place.after( this.create_preview_field() );
						},

						send_preview: function(){

							var destination_email 	= $( '.ms-email-preview .ms-email-preview-input' ).val(),
								subject 			= $( '#subject' ).val(),
								comm_type 			= this.comm_type, //$( '#comm_type' ).val(),
								membership_id 		= $( '.ms-email-preview-membership' ).val();

							if( destination_email == '' || ! this.is_email(destination_email) ){
								alert( this.warning_email_text );
								return;
							}

							var data = {
								action: 'ms_preview_notification',
								security: this.nonce,
								destination_email: destination_email,
								subject: subject,
								comm_type: comm_type,
								membership_id: membership_id
							};

							$.post(ajaxurl, data, function(response) {

								if( ! response.success ){
									alert( response.message );
									return;
								}

								var success_msg = $( '<div/>',{
									"class": 'notice notice-success is-dismissible ms-email-preview-successmsg',
									text: response.message
								});

								$( '.ms-email-preview' ).append( success_msg );

								success_msg.show( 300 ).delay(5000).fadeOut( 300, function(){ success_msg.remove(); } );

							});
						},

						is_email: function(email) {
							var regex = /^([a-zA-Z0-9_.+-])+\@(([a-zA-Z0-9-])+\.)+([a-zA-Z0-9]{2,4})+$/;
							return regex.test(email);
						}

					};

					$(document).ready(function(){
						
						MS_Preview_Notification.insert_preview_field();

						$(document).on( 'click', '.ms-email-preview-button', function(){
							MS_Preview_Notification.send_preview();
						});

					});

				})(jQuery)
			</script>
			<?php
		}
			
	}

	add_action( 'plugins_loaded', function(){
		$GLOBALS['WPMUDEV_MS_Notification_Preview'] = WPMUDEV_MS_Notification_Preview::get_instance();
	}, 10 );
}

It should be adding a new section in
admin > Membership 2 > Settings > Automated Email Responses tab
right under the form.

Fill in the email and select a destination email address so it sends a test email to that address.