/** * Validates the given options as index options. * @param [String => Mixed] $opts * @return [String => Mixed] */ protected function validate($opts) { $opts = parent::validate($opts); // Validates values. if (!isset($opts['lrs_id'])) { throw new Exceptions\Exception('`lrs_id` must be set.'); } if ($opts['offset'] < 0) { throw new Exceptions\Exception('`offset` must be a positive interger.'); } if ($opts['limit'] < 1) { throw new Exceptions\Exception('`limit` must be a positive interger.'); } if (!in_array($opts['format'], ['exact', 'canonical', 'ids'])) { throw new Exceptions\Exception('`format` must be "exact", "canonical", or "ids".'); } return $opts; }