Check new bookings for blacklisted words in comments for Restaurant Reservations

comment-blacklist-for-rtb.php

<?php
/**
 * Plugin Name: Comment Blacklist for Restaurant Reservations
 * Plugin URI: http://themeofthecrop.com
 * Description: Check if a booking includes blacklisted words from Settings > Discussion > Comment Blacklist before accepting it.
 * Version: 1.0
 * Author: Theme of the Crop
 * Author URI: http://themeofthecrop.com
 * License:     GNU General Public License v2.0 or later
 * License URI: http://www.gnu.org/licenses/gpl-2.0.html
 * Requires at least: 4.0
 * Tested up to: 4.1
 *
 *
 * This program is free software; you can redistribute it and/or modify it under the terms of the GNU
 * General Public License as published by the Free Software Foundation; either version 2 of the License,
 * or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without
 * even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
 *
 * You should have received a copy of the GNU General Public License along with this program; if not, write
 * to the Free Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA
 */
if ( ! defined( 'ABSPATH' ) )
	exit;


add_action( 'rtb_validate_booking_submission', function( $booking ) {
	
	$blacklist = get_option('blacklist_keys', '');
	$words = explode("\n", trim($blacklist));
	
	foreach ($words as $word) {
		if (strpos($booking->name, $word) !== false) {
			$booking->validation_errors[] = array(
				'field'			=> 'name',
				'post_variable'	=> $_POST['rtb-name'],
				'message'	=> __( 'The name you entered can not be accepted.', 'restaurant-reservations' ),
			);
		}
		if (strpos($booking->phone, $word) !== false) {
			$booking->validation_errors[] = array(
				'field'			=> 'phone',
				'post_variable'	=> $_POST['rtb-phone'],
				'message'	=> __( 'The phone number you entered can not be accepted.', 'restaurant-reservations' ),
			);
		}
		if (strpos($booking->message, $word) !== false) {
			$booking->validation_errors[] = array(
				'field'			=> 'message',
				'post_variable'	=> $_POST['rtb-message'],
				'message'	=> __( 'The message you entered can not be accepted.', 'restaurant-reservations' ),
			);
		}
	}
} );