<?php
if (!class_exists("wd_CFSearchCallBack")) {
    /**
     * Class wd_CFSearchCallBack
     *
     * Custom field search, which passes the results to a JS callback method
     *
     * @package  WPDreams/OptionsFramework/Classes
     * @category Class
     * @author Ernest Marcinko <ernest.marcinko@wp-dreams.com>
     * @link http://wp-dreams.com, http://codecanyon.net/user/anago/portfolio
     * @copyright Copyright (c) 2016, Ernest Marcinko
     */
    class wd_CFSearchCallBack extends wpdreamsType {
        private $args = array(
            'callback' => '',       // javacsript function name in the windows scope | if empty, shows results
            'placeholder' => 'Search custom fields..',
            'search_values' => 0,
            'limit' => 10,
            'delimiter' => '!!!CFRES!!!',
            'controls_position' => 'right',
            'class' => ''
        );

        public function getType() {
            parent::getType();
            $this->processData();
            ?>
            <div class='wd_cf_search<?php echo $this->args['class'] != '' ? ' '.$this->args['class'] : "";?>'
                 id='wd_cf_search-<?php echo self::$_instancenumber; ?>'>
                <?php if ($this->args['controls_position'] == 'left') $this->printControls(); ?>
                <?php echo $this->label; ?> <input type="search" name="<?php echo $this->name; ?>"
                                                   class="wd_cf_search"
                                                   value="<?php echo (is_array($this->data) && isset($this->data['value'])) ? $this->data['value'] : $this->data; ?>"
                                                   placeholder="<?php echo $this->args['placeholder']; ?>"/>
                <input type='hidden' value="<?php echo base64_encode(json_encode($this->args)); ?>" class="wd_args">
                <?php if ($this->args['controls_position'] != 'left') $this->printControls(); ?>
                <div class="wd_cf_search_res"></div>
            </div>
            <?php
        }

        private function printControls() {
            ?>
            <span class="loading-small hiddend"></span>
            <div class="wd_ts_close hiddend">
                <svg version="1.1" xmlns="http://www.w3.org/2000/svg" xmlns:xlink="http://www.w3.org/1999/xlink" x="0px" y="0px" width="24px" height="24px" viewBox="0 0 512 512" enable-background="new 0 0 512 512" xml:space="preserve">
                        <polygon id="x-mark-icon" points="438.393,374.595 319.757,255.977 438.378,137.348 374.595,73.607 255.995,192.225 137.375,73.622 73.607,137.352 192.246,255.983 73.622,374.625 137.352,438.393 256.002,319.734 374.652,438.378 "></polygon>
                    </svg>
            </div>
            <?php
        }

        public static function searchCF() {
            global $wpdb;
            $phrase = '%'.trim($_POST['wd_phrase']).'%';
            $data = json_decode(base64_decode($_POST['wd_args']), true);
            if ( $data['search_values'] == 1)
                $cf_query = $wpdb->prepare(
                    "SELECT DISTINCT(meta_key) FROM $wpdb->postmeta WHERE meta_key LIKE '%s' OR meta_value LIKE '%s' LIMIT %d",
                    $phrase, $phrase, $data['limit']);
            else
                $cf_query = $wpdb->prepare(
                    "SELECT DISTINCT(meta_key) FROM $wpdb->postmeta WHERE meta_key LIKE '%s' LIMIT %d",
                    $phrase, $data['limit']);
            $cf_results = $wpdb->get_results( $cf_query, OBJECT );

            print_r($data['delimiter'] . json_encode($cf_results) . $data['delimiter']);
            die();
        }

        public function processData() {
            // Get the args first if exists
            if ( is_array($this->data) && isset($this->data['args']) )
                $this->args = array_merge($this->args, $this->data['args']);

            if ( is_array($this->data) && isset($this->data['value']) ) {
                // If called from back-end non-post context
                $this->data = $this->data['value'];
            }
        }

        public final function getData() {
            return $this->data;
        }
    }
}

if ( !has_action('wp_ajax_wd_search_cf') )
    add_action('wp_ajax_wd_search_cf', 'wd_CFSearchCallBack::searchCF');