thor', 'jet-engine' ),
			'bookmark'   => esc_html__( 'Bookmark', 'jet-engine' ),
			'external'   => esc_html__( 'External', 'jet-engine' ),
			'help'       => esc_html__( 'Help', 'jet-engine' ),
			'license'    => esc_html__( 'License', 'jet-engine' ),
			'next'       => esc_html__( 'Next', 'jet-engine' ),
			'nofollow'   => esc_html__( 'Nofollow', 'jet-engine' ),
			'noreferrer' => esc_html__( 'Noreferrer', 'jet-engine' ),
			'noopener'   => esc_html__( 'Noopener', 'jet-engine' ),
			'prev'       => esc_html__( 'Prev', 'jet-engine' ),
			'search'     => esc_html__( 'Search', 'jet-engine' ),
			'tag'        => esc_html__( 'Tag', 'jet-engine' ),
		);

		if ( ARRAY_N === $format ) {

			$result = array();

			foreach ( $options as $value => $label ) {
				$result[] = array(
					'value' => $value,
					'label' => $label,
				);
			}

			return $result;
		}

		return $options;
	}

	/**
	 * Duplicate of `Jet_Engine_Tools::insert_after`.
	 */
	public static function array_insert_after( $source = array(), $after = null, $insert = array() ) {
		return self::insert_after( $source, $after, $insert );
	}

	/**
	 * Returns list of menu positions with index and appropriate labels
	 * @return [type] [description]
	 */
	public static function get_available_menu_positions() {
		return apply_filters( 'jet-engine/tools/available-menu-positions', array(
			array(
				'value' => 3,
				'label' => __( 'Dashboard', 'jet-engine' ),
			),
			array(
				'value' => 4,
				'label' => __( 'First Separator', 'jet-engine' ),
			),
			array(
				'value' => 6,
				'label' => __( 'Posts', 'jet-engine' ),
			),
			array(
				'value' => 11,
				'label' => __( 'Media', 'jet-engine' ),
			),
			array(
				'value' => 16,
				'label' => __( 'Links', 'jet-engine' ),
			),
			array(
				'value' => 21,
				'label' => __( 'Pages', 'jet-engine' ),
			),
			array(
				'value' => 26,
				'label' => __( 'Comments', 'jet-engine' ),
			),
			array(
				'value' => 59,
				'label' => __( 'Second Separator', 'jet-engine' ),
			),
			array(
				'value' => 61,
				'label' => __( 'Appearance', 'jet-engine' ),
			),
			array(
				'value' => 66,
				'label' => __( 'Plugins', 'jet-engine' ),
			),
			array(
				'value' => 71,
				'label' => __( 'Users', 'jet-engine' ),
			),
			array(
				'value' => 76,
				'label' => __( 'Tools', 'jet-engine' ),
			),
			array(
				'value' => 81,
				'label' => __( 'Settings', 'jet-engine' ),
			),
			array(
				'value' => 100,
				'label' => __( 'Third Separator', 'jet-engine' ),
			),
		) );
	}

	/**
	 * Returns default menu poistion for JetEngine user-created instance.
	 * Main purpose - compatibility with JetDashboard module
	 * 
	 * @return [type] [description]
	 */
	public static function get_default_menu_position() {
		return apply_filters( 'jet-engine/tools/default-menu-position', '' );
	}

	/**
	 * Ensures a string is a valid SQL 'order by' clause.
	 *
	 * Accepts one or more columns, with or without a sort order (ASC / DESC).
	 * e.g. 'column_1', 'column_1, column_2', 'column_1 ASC, column_2 DESC' etc.
	 *
	 * Also accepts 'posts.column_1', 'posts.column_1, column_2', 'posts.column_1 ASC, column_2 DESC' etc.
	 *
	 * Also accepts 'RAND()'.
	 *
	 * @param string $orderby Order by clause to be validated.
	 * @return string|false Returns $orderby if valid, false otherwise.
	 */
	public static function sanitize_sql_orderby( $orderby ) {

		if (
			preg_match( '/^\s*(([a-z0-9_\.]+|`[a-z0-9_\.]+`)(\s+(ASC|DESC))?\s*(,\s*(?=[a-z0-9_`\.])|$))+$/i', $orderby )
			|| preg_match( '/^\s*RAND\(\s*\)\s*$/i', $orderby )
			|| preg_match( '/^\s*FIELD\s*\(.*?\)\s*$/i', $orderby )
		) {
			return $orderby;
		}

		return false;
	}

	public static function delete_metadata_by_object_where( $meta_type = null, $meta_key = null, $object_where = array() ) {

		if ( empty( $meta_type )  || empty( $meta_key ) || empty( $object_where ) ) {
			return false;
		}

		if ( ! in_array( $meta_type, array( 'post', 'term', 'user' ) ) ) {
			return false;
		}

		global $wpdb;

		$raw_meta_table   = $meta_type . 'meta';
		$raw_object_table = ( 'term' === $meta_type ) ? 'term_taxonomy' : $meta_type . 's';

		if ( empty( $wpdb->$raw_meta_table ) || empty( $wpdb->$raw_object_table ) ) {
			return false;
		}

		$meta_table    = $wpdb->$raw_meta_table;
		$object_table  = $wpdb->$raw_object_table;
		$meta_column   = sanitize_key( $meta_type . '_id' );
		$object_column = ( 'term' === $meta_type ) ? 'term_id' : 'ID';
		$id_column     = ( 'user' === $meta_type ) ? 'umeta_id' : 'meta_id';

		$query = "SELECT $raw_meta_table.$id_column FROM $meta_table AS $raw_meta_table ";
		$query .= "INNER JOIN $object_table AS $raw_object_table ON $raw_object_table.$object_column = $raw_meta_table.$meta_column ";

		$query .= "WHERE ";

		$where = array(
			"$raw_meta_table.meta_key" => $meta_key
		);

		foreach ( $object_where as $column => $value ) {
			$where["$raw_object_table.$column"] = $value;
		}

		$glue = '';

		foreach ( $where as $column => $value ) {

			if ( empty( $value ) ) {
				continue;
			}

			if ( is_array( $value ) ) {
				$operator = 'IN';
				$value = array_map( 'trim', $value );
				$value = array_map( function ( $item ) {
					return sprintf( "'%s'", esc_sql( $item ) );
				}, $value );
				$value = sprintf( '( %s )', implode( ', ', $value ) );
			} else {
				$operator = '=';
				$value    = sprintf( "'%s'", esc_sql( $value ) );
			}

			$column = esc_sql( $column );
			$query .= $glue;
			$query .= "$column $operator $value";
			$glue = ' AND ';
		}

		$meta_ids = $wpdb->get_col( $query );

		if ( ! count( $meta_ids ) ) {
			return false;
		}

		$object_ids_query = str_replace( "SELECT $raw_meta_table.$id_column", "SELECT $raw_meta_table.$meta_column", $query );

		$object_ids = $wpdb->get_col( $object_ids_query );
		$object_ids = array_unique( $object_ids );
		$object_ids = array_values( $object_ids );

		$delete_query = "DELETE FROM $meta_table WHERE $id_column IN( " . implode( ',', $meta_ids ) . " )";

		$count = $wpdb->query( $delete_query );

		if ( ! $count ) {
			return false;
		}

		wp_cache_delete_multiple( (array) $object_ids, $meta_type . '_meta' );

		return true;
	}

}