$prepared = $this->map_params_to_query_args( $prepared, $registered, $request );

		return $prepared;

	}

	/**
	 * Map schema to query arguments to retrieve a collection of objects.
	 *
	 * @since 1.0.0-beta.12
	 *
	 * @param array           $prepared   Array of collection arguments.
	 * @param array           $registered Registered collection params.
	 * @param WP_REST_Request $request    Full details about the request.
	 * @return array|WP_Error
	 */
	protected function map_params_to_query_args( $prepared, $registered, $request ) {
		return $prepared;
	}

	/**
	 * Format search query arguments to retrieve a collection of objects.
	 *
	 * @since 1.0.0-beta.12
	 * @since 1.0.0-beta.21 Return an error if requesting a list ordered by 'relevance' without providing a search string.
	 *
	 * @param array           $prepared Array of collection arguments.
	 * @param WP_REST_Request $request  Request object.
	 * @return array|WP_Error
	 */
	protected function prepare_collection_query_search_args( $prepared, $request ) {

		// Search?
		if ( ! empty( $prepared['search'] ) ) {

			if ( ! empty( $this->search_columns_mapping ) ) {

				if ( empty( $prepared['search_columns'] ) ) {
					return llms_rest_bad_request_error( __( 'You must provide a valid set of columns to search into.', 'lifterlms' ) );
				}

				// Filter search columns by context.
				$search_columns = array_keys( $this->filter_response_by_context( array_flip( $prepared['search_columns'] ), $request['context'] ) );

				// Check if one of more unallowed search columns have been provided as request query params (not merged with defaults).
				if ( ! empty( $request->get_query_params()['search_columns'] ) ) {

					$forbidden_columns = array_diff( $prepared['search_columns'], $search_columns );

					if ( ! empty( $forbidden_columns ) ) {
						return llms_rest_authorization_required_error(
							sprintf(
								// Translators: %1$s comma separated list of search columns.
								__( 'You are not allowed to search into the provided column(s): %1$s', 'lifterlms' ),
								implode( ',', $forbidden_columns )
							)
						);
					}