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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
*/
public function __construct() {
$this->namespace = 'wp/v2';
$this->rest_base = 'taxonomies';
}
/**
* Registers the routes for taxonomies.
*
* @since 4.7.0
*
* @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
*
* @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->assign_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
*
* @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->assign_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
*
* @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->assign_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
*
* @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( $data );
}
/**
* Prepares a taxonomy object for serialization.
*
* @since 4.7.0
* @since 5.9.0 Renamed `$taxonomy` to `$item` to match parent class for PHP 8 named parameter support.
*
* @param WP_Taxonomy $item Taxonomy data.
* @param WP_REST_Request $request Full details about the request.
* @return WP_REST_Response Response object.
*/
public function prepare_item_for_response( $item, $request ) {
// Restores the more descriptive, specific name for use within this method.
$taxonomy = $item;
$base = ! empty( $taxonomy->rest_base ) ? $taxonomy->rest_base : $taxonomy->name;
$fields = $this->get_fields_for_response( $request );
$data = array();
if ( in_array( 'name', $fields, true ) ) {
$data['name'] = $taxonomy->label;
}
if ( in_array( 'slug', $fields, true ) ) {
$data['slug'] = $taxonomy->name;
}
if ( in_array( 'capabilities', $fields, true ) ) {
$data['capabilities'] = $taxonomy->cap;
}
if ( in_array( 'description', $fields, true ) ) {
$data['description'] = $taxonomy->description;
}
if ( in_array( 'labels', $fields, true ) ) {
$data['labels'] = $taxonomy->labels;
}
if ( in_array( 'types', $fields, true ) ) {
$data['types'] = array_values( $taxonomy->object_type );
}
if ( in_array( 'show_cloud', $fields, true ) ) {
$data['show_cloud'] = $taxonomy->show_tagcloud;
}
if ( in_array( 'hierarchical', $fields, true ) ) {
$data['hierarchical'] = $taxonomy->hierarchical;
}
if ( in_array( 'rest_base', $fields, true ) ) {
$data['rest_base'] = $base;
}
if ( in_array( 'rest_namespace', $fields, true ) ) {
$data['rest_namespace'] = $taxonomy->rest_namespace;
}
if ( in_array( 'visibility', $fields, true ) ) {
$data['visibility'] = array(
'public' => (bool) $taxonomy->public,
'publicly_queryable' => (bool) $taxonomy->publicly_queryable,
'show_admin_column' => (bool) $taxonomy->show_admin_column,
'show_in_nav_menus' => (bool) $taxonomy->show_in_nav_menus,
'show_in_quick_edit' => (bool) $taxonomy->show_in_quick_edit,
'show_ui' => (bool) $taxonomy->show_ui,
);
}
$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( rest_get_route_for_taxonomy_items( $taxonomy->name ) ),
),
)
);
/**
* 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 WP_Taxonomy $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
* @since 5.0.0 The `visibility` property was added.
* @since 5.9.0 The `rest_namespace` property was added.
*
* @return array Item schema data.
*/
public function get_item_schema() {
if ( $this->schema ) {
return $this->add_additional_fields_schema( $this->schema );
}
$schema = array(
'$schema' => 'http://json-schema.org/draft-04/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,
),
'rest_namespace' => array(
'description' => __( 'REST namespace route for the taxonomy.' ),
'type' => 'string',
'context' => array( 'view', 'edit', 'embed' ),
'readonly' => true,
),
'visibility' => array(
'description' => __( 'The visibility settings for the taxonomy.' ),
'type' => 'object',
'context' => array( 'edit' ),
'readonly' => true,
'properties' => array(
'public' => array(
'description' => __( 'Whether a taxonomy is intended for use publicly either via the admin interface or by front-end users.' ),
'type' => 'boolean',
),
'publicly_queryable' => array(
'description' => __( 'Whether the taxonomy is publicly queryable.' ),
'type' => 'boolean',
),
'show_ui' => array(
'description' => __( 'Whether to generate a default UI for managing this taxonomy.' ),
'type' => 'boolean',
),
'show_admin_column' => array(
'description' => __( 'Whether to allow automatic creation of taxonomy columns on associated post-types table.' ),
'type' => 'boolean',
),
'show_in_nav_menus' => array(
'description' => __( 'Whether to make the taxonomy available for selection in navigation menus.' ),
'type' => 'boolean',
),
'show_in_quick_edit' => array(
'description' => __( 'Whether to show the taxonomy in the quick/bulk edit panel.' ),
'type' => 'boolean',
),
),
),
),
);
$this->schema = $schema;
return $this->add_additional_fields_schema( $this->schema );
}
/**
* Retrieves the query params for collections.
*
* @since 4.7.0
*
* @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;
}
}
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