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<?php
/**
* REST API: WP_REST_Taxonomies_Controller class
*
* @package WordPress
* @subpackage REST_API
* @since 4.7.0
*/
/**
* Core class used to manage taxonomies via the REST API.
*
* @since 4.7.0
*
* @see WP_REST_Controller
*/
class WP_REST_Taxonomies_Controller extends WP_REST_Controller {
/**
* Constructor.
*
* @since 4.7.0
* @access public
*/
public function __construct() {
$this->namespace = 'wp/v2';
$this->rest_base = 'taxonomies';
}
/**
* Registers the routes for the objects of the controller.
*
* @since 4.7.0
* @access public
*
* @see register_rest_route()
*/
public function register_routes() {
register_rest_route( $this->namespace, '/' . $this->rest_base, array(
array(
'methods' => WP_REST_Server::READABLE,
'callback' => array( $this, 'get_items' ),
'permission_callback' => array( $this, 'get_items_permissions_check' ),
'args' => $this->get_collection_params(),
),
'schema' => array( $this, 'get_public_item_schema' ),
) );
register_rest_route( $this->namespace, '/' . $this->rest_base . '/(?P<taxonomy>[\w-]+)', array(
'args' => array(
'taxonomy' => array(
'description' => __( 'An alphanumeric identifier for the taxonomy.' ),
'type' => 'string',
),
),
array(
'methods' => WP_REST_Server::READABLE,
'callback' => array( $this, 'get_item' ),
'permission_callback' => array( $this, 'get_item_permissions_check' ),
'args' => array(
'context' => $this->get_context_param( array( 'default' => 'view' ) ),
),
),
'schema' => array( $this, 'get_public_item_schema' ),
) );
}
/**
* Checks whether a given request has permission to read taxonomies.
*
* @since 4.7.0
* @access public
*
* @param WP_REST_Request $request Full details about the request.
* @return true|WP_Error True if the request has read access, WP_Error object otherwise.
*/
public function get_items_permissions_check( $request ) {
if ( 'edit' === $request['context'] ) {
if ( ! empty( $request['type'] ) ) {
$taxonomies = get_object_taxonomies( $request['type'], 'objects' );
} else {
$taxonomies = get_taxonomies( '', 'objects' );
}
foreach ( $taxonomies as $taxonomy ) {
if ( ! empty( $taxonomy->show_in_rest ) && current_user_can( $taxonomy->cap->manage_terms ) ) {
return true;
}
}
return new WP_Error( 'rest_cannot_view', __( 'Sorry, you are not allowed to manage terms in this taxonomy.' ), array( 'status' => rest_authorization_required_code() ) );
}
return true;
}
/**
* Retrieves all public taxonomies.
*
* @since 4.7.0
* @access public
*
* @param WP_REST_Request $request Full details about the request.
* @return WP_REST_Response Response object on success, or WP_Error object on failure.
*/
public function get_items( $request ) {
// Retrieve the list of registered collection query parameters.
$registered = $this->get_collection_params();
if ( isset( $registered['type'] ) && ! empty( $request['type'] ) ) {
$taxonomies = get_object_taxonomies( $request['type'], 'objects' );
} else {
$taxonomies = get_taxonomies( '', 'objects' );
}
$data = array();
foreach ( $taxonomies as $tax_type => $value ) {
if ( empty( $value->show_in_rest ) || ( 'edit' === $request['context'] && ! current_user_can( $value->cap->manage_terms ) ) ) {
continue;
}
$tax = $this->prepare_item_for_response( $value, $request );
$tax = $this->prepare_response_for_collection( $tax );
$data[ $tax_type ] = $tax;
}
if ( empty( $data ) ) {
// Response should still be returned as a JSON object when it is empty.
$data = (object) $data;
}
return rest_ensure_response( $data );
}
/**
* Checks if a given request has access to a taxonomy.
*
* @since 4.7.0
* @access public
*
* @param WP_REST_Request $request Full details about the request.
* @return true|WP_Error True if the request has read access for the item, otherwise false or WP_Error object.
*/
public function get_item_permissions_check( $request ) {
$tax_obj = get_taxonomy( $request['taxonomy'] );
if ( $tax_obj ) {
if ( empty( $tax_obj->show_in_rest ) ) {
return false;
}
if ( 'edit' === $request['context'] && ! current_user_can( $tax_obj->cap->manage_terms ) ) {
return new WP_Error( 'rest_forbidden_context', __( 'Sorry, you are not allowed to manage terms in this taxonomy.' ), array( 'status' => rest_authorization_required_code() ) );
}
}
return true;
}
/**
* Retrieves a specific taxonomy.
*
* @since 4.7.0
* @access public
*
* @param WP_REST_Request $request Full details about the request.
* @return WP_REST_Response|WP_Error Response object on success, or WP_Error object on failure.
*/
public function get_item( $request ) {
$tax_obj = get_taxonomy( $request['taxonomy'] );
if ( empty( $tax_obj ) ) {
return new WP_Error( 'rest_taxonomy_invalid', __( 'Invalid taxonomy.' ), array( 'status' => 404 ) );
}
$data = $this->prepare_item_for_response( $tax_obj, $request );
return rest_ensure_response( $data );
}
/**
* Prepares a taxonomy object for serialization.
*
* @since 4.7.0
* @access public
*
* @param stdClass $taxonomy Taxonomy data.
* @param WP_REST_Request $request Full details about the request.
* @return WP_REST_Response Response object.
*/
public function prepare_item_for_response( $taxonomy, $request ) {
$base = ! empty( $taxonomy->rest_base ) ? $taxonomy->rest_base : $taxonomy->name;
$data = array(
'name' => $taxonomy->label,
'slug' => $taxonomy->name,
'capabilities' => $taxonomy->cap,
'description' => $taxonomy->description,
'labels' => $taxonomy->labels,
'types' => $taxonomy->object_type,
'show_cloud' => $taxonomy->show_tagcloud,
'hierarchical' => $taxonomy->hierarchical,
'rest_base' => $base,
);
$context = ! empty( $request['context'] ) ? $request['context'] : 'view';
$data = $this->add_additional_fields_to_object( $data, $request );
$data = $this->filter_response_by_context( $data, $context );
// Wrap the data in a response object.
$response = rest_ensure_response( $data );
$response->add_links( array(
'collection' => array(
'href' => rest_url( sprintf( '%s/%s', $this->namespace, $this->rest_base ) ),
),
'https://api.w.org/items' => array(
'href' => rest_url( sprintf( 'wp/v2/%s', $base ) ),
),
) );
/**
* Filters a taxonomy returned from the REST API.
*
* Allows modification of the taxonomy data right before it is returned.
*
* @since 4.7.0
*
* @param WP_REST_Response $response The response object.
* @param object $item The original taxonomy object.
* @param WP_REST_Request $request Request used to generate the response.
*/
return apply_filters( 'rest_prepare_taxonomy', $response, $taxonomy, $request );
}
/**
* Retrieves the taxonomy's schema, conforming to JSON Schema.
*
* @since 4.7.0
* @access public
*
* @return array Item schema data.
*/
public function get_item_schema() {
$schema = array(
'$schema' => 'http://json-schema.org/schema#',
'title' => 'taxonomy',
'type' => 'object',
'properties' => array(
'capabilities' => array(
'description' => __( 'All capabilities used by the taxonomy.' ),
'type' => 'object',
'context' => array( 'edit' ),
'readonly' => true,
),
'description' => array(
'description' => __( 'A human-readable description of the taxonomy.' ),
'type' => 'string',
'context' => array( 'view', 'edit' ),
'readonly' => true,
),
'hierarchical' => array(
'description' => __( 'Whether or not the taxonomy should have children.' ),
'type' => 'boolean',
'context' => array( 'view', 'edit' ),
'readonly' => true,
),
'labels' => array(
'description' => __( 'Human-readable labels for the taxonomy for various contexts.' ),
'type' => 'object',
'context' => array( 'edit' ),
'readonly' => true,
),
'name' => array(
'description' => __( 'The title for the taxonomy.' ),
'type' => 'string',
'context' => array( 'view', 'edit', 'embed' ),
'readonly' => true,
),
'slug' => array(
'description' => __( 'An alphanumeric identifier for the taxonomy.' ),
'type' => 'string',
'context' => array( 'view', 'edit', 'embed' ),
'readonly' => true,
),
'show_cloud' => array(
'description' => __( 'Whether or not the term cloud should be displayed.' ),
'type' => 'boolean',
'context' => array( 'edit' ),
'readonly' => true,
),
'types' => array(
'description' => __( 'Types associated with the taxonomy.' ),
'type' => 'array',
'items' => array(
'type' => 'string',
),
'context' => array( 'view', 'edit' ),
'readonly' => true,
),
'rest_base' => array(
'description' => __( 'REST base route for the taxonomy.' ),
'type' => 'string',
'context' => array( 'view', 'edit', 'embed' ),
'readonly' => true,
),
),
);
return $this->add_additional_fields_schema( $schema );
}
/**
* Retrieves the query params for collections.
*
* @since 4.7.0
* @access public
*
* @return array Collection parameters.
*/
public function get_collection_params() {
$new_params = array();
$new_params['context'] = $this->get_context_param( array( 'default' => 'view' ) );
$new_params['type'] = array(
'description' => __( 'Limit results to taxonomies associated with a specific post type.' ),
'type' => 'string',
);
return $new_params;
}
}