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<?php
// Prevent loading this file directly
defined( 'ABSPATH' ) || exit;
require_once THE7_RWMB_FIELDS_DIR . 'taxonomy.php';

if ( ! class_exists( 'THE7_RWMB_Taxonomy_Advanced_Field' ) )
{
	class THE7_RWMB_Taxonomy_Advanced_Field extends THE7_RWMB_Taxonomy_Field
	{
		/**
		 * Get meta values to save
		 * Save terms in custom field, no more by setting post terms
		 * Save in form of comma-separated IDs
		 *
		 * @param mixed $new
		 * @param mixed $old
		 * @param int   $post_id
		 * @param array $field
		 *
		 * @return string
		 */
		static function value( $new, $old, $post_id, $field )
		{
			return implode( ',', array_unique( $new ) );
		}

		/**
		 * Save meta value
		 *
		 * @param mixed $new
		 * @param mixed $old
		 * @param int   $post_id
		 * @param array $field
		 *
		 * @return string
		 */
		static function save( $new, $old, $post_id, $field )
		{
			if ( $new )
				update_post_meta( $post_id, $field['id'], $new );
			else
				delete_post_meta( $post_id, $field['id'] );
		}

		/**
		 * Standard meta retrieval
		 *
		 * @param mixed $meta
		 * @param int   $post_id
		 * @param bool  $saved
		 * @param array $field
		 *
		 * @return array
		 */
		static function meta( $meta, $post_id, $saved, $field )
		{
			$meta = get_post_meta( $post_id, $field['id'], true );
			$meta = array_map( 'intval', array_filter( explode( ',', $meta . ',' ) ) );
			return $meta;
		}
	}
}