WP_REST_Posts_Controller::prepare_taxonomy_limit_schema( array $query_params ): array

Source

private function prepare_taxonomy_limit_schema( array $query_params ) {
	$taxonomies = wp_list_filter( get_object_taxonomies( $this->post_type, 'objects' ), array( 'show_in_rest' => true ) );

	if ( ! $taxonomies ) {
		return $query_params;
	}

	$query_params['tax_relation'] = array(
		'description' => __( 'Limit result set based on relationship between multiple taxonomies.' ),
		'type'        => 'string',
		'enum'        => array( 'AND', 'OR' ),
	);

	$limit_schema = array(
		'type'  => array( 'object', 'array' ),
		'oneOf' => array(
			array(
				'title'       => __( 'Term ID List' ),
				'description' => __( 'Match terms with the listed IDs.' ),
				'type'        => 'array',
				'items'       => array(
					'type' => 'integer',
				),
			),
			array(
				'title'                => __( 'Term ID Taxonomy Query' ),
				'description'          => __( 'Perform an advanced term query.' ),
				'type'                 => 'object',
				'properties'           => array(
					'terms'            => array(
						'description' => __( 'Term IDs.' ),
						'type'        => 'array',
						'items'       => array(
							'type' => 'integer',
						),
						'default'     => array(),
					),
					'include_children' => array(
						'description' => __( 'Whether to include child terms in the terms limiting the result set.' ),
						'type'        => 'boolean',
						'default'     => false,
					),
				),
				'additionalProperties' => false,
			),
		),
	);

	$include_schema = array_merge(
		array(
			/* translators: %s: Taxonomy name. */
			'description' => __( 'Limit result set to items with specific terms assigned in the %s taxonomy.' ),
		),
		$limit_schema
	);
	// 'operator' is supported only for 'include' queries.
	$include_schema['oneOf'][1]['properties']['operator'] = array(
		'description' => __( 'Whether items must be assigned all or any of the specified terms.' ),
		'type'        => 'string',
		'enum'        => array( 'AND', 'OR' ),
		'default'     => 'OR',
	);

	$exclude_schema = array_merge(
		array(
			/* translators: %s: Taxonomy name. */
			'description' => __( 'Limit result set to items except those with specific terms assigned in the %s taxonomy.' ),
		),
		$limit_schema
	);

	foreach ( $taxonomies as $taxonomy ) {
		$base         = ! empty( $taxonomy->rest_base ) ? $taxonomy->rest_base : $taxonomy->name;
		$base_exclude = $base . '_exclude';

		$query_params[ $base ]                = $include_schema;
		$query_params[ $base ]['description'] = sprintf( $query_params[ $base ]['description'], $base );

		$query_params[ $base_exclude ]                = $exclude_schema;
		$query_params[ $base_exclude ]['description'] = sprintf( $query_params[ $base_exclude ]['description'], $base );

		if ( ! $taxonomy->hierarchical ) {
			unset( $query_params[ $base ]['oneOf'][1]['properties']['include_children'] );
			unset( $query_params[ $base_exclude ]['oneOf'][1]['properties']['include_children'] );
		}
	}

	return $query_params;
}

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