<?php
/**
 * This source file is part of the open source project
 * ExpressionEngine (https://expressionengine.com)
 *
 * @link      https://expressionengine.com/
 * @copyright Copyright (c) 2003-2022, Packet Tide, LLC (https://www.packettide.com)
 * @license   https://expressionengine.com/license Licensed under Apache License, Version 2.0
 */

namespace ExpressionEngine\Service\Validation\Rule;

use ExpressionEngine\Service\Validation\ValidationRule;
use ExpressionEngine\Service\Validation\Rule\Email;

/**
 * UniqueEmail Validation Rule
 */
class UniqueEmail extends ValidationRule
{
    /**
     * Check to see if the email address is unique on the site
     *
     * @return boolean TRUE if it's unique, FALSE if it already exists
     */
    public function validate($key, $value)
    {
        // Check for config, otherwise default
        $prevent = ee()->config->item('gmail_duplication_prevention') ?: 'y';

        //do we have a valid email address?
        $emailValid = new Email();
        $validEmail = $emailValid->validate($key, $value);

        if (!$validEmail) {
            // no valid email address kill it here
            return false;
        }

        if (get_bool_from_string($prevent) && strpos($value, '@gmail.com') !== false) {
            $address = explode('@', $value);
            $sql = 'SELECT REPLACE(REPLACE(LOWER(email), "@gmail.com", ""), ".", "") AS gmail
				FROM exp_members
				WHERE email LIKE "%gmail.com"
				HAVING gmail = "' . ee()->db->escape_str(str_replace('.', '', $address[0])) . '";';
            $query = ee()->db->query($sql);

            $count = $query->num_rows();
        } else {
            $count = ee('Model')->get('Member')
                ->filter('email', $value)
                ->count();
        }

        return ($count <= 0);
    }

    public function getLanguageKey()
    {
        return 'unique_email';
    }
}

// EOF
