angelovcom.net

class-wp-rest-terms-controller.php (32275B)

---

 <?php
 /**
  * REST API: WP_REST_Terms_Controller class
  *
  * @package WordPress
  * @subpackage REST_API
  * @since 4.7.0
  */
 
 /**
  * Core class used to managed terms associated with a taxonomy via the REST API.
  *
  * @since 4.7.0
  *
  * @see WP_REST_Controller
  */
 class WP_REST_Terms_Controller extends WP_REST_Controller {
 
 	/**
 	 * Taxonomy key.
 	 *
 	 * @since 4.7.0
 	 * @var string
 	 */
 	protected $taxonomy;
 
 	/**
 	 * Instance of a term meta fields object.
 	 *
 	 * @since 4.7.0
 	 * @var WP_REST_Term_Meta_Fields
 	 */
 	protected $meta;
 
 	/**
 	 * Column to have the terms be sorted by.
 	 *
 	 * @since 4.7.0
 	 * @var string
 	 */
 	protected $sort_column;
 
 	/**
 	 * Number of terms that were found.
 	 *
 	 * @since 4.7.0
 	 * @var int
 	 */
 	protected $total_terms;
 
 	/**
 	 * Constructor.
 	 *
 	 * @since 4.7.0
 	 *
 	 * @param string $taxonomy Taxonomy key.
 	 */
 	public function __construct( $taxonomy ) {
 		$this->taxonomy  = $taxonomy;
 		$this->namespace = 'wp/v2';
 		$tax_obj         = get_taxonomy( $taxonomy );
 		$this->rest_base = ! empty( $tax_obj->rest_base ) ? $tax_obj->rest_base : $tax_obj->name;
 
 		$this->meta = new WP_REST_Term_Meta_Fields( $taxonomy );
 	}
 
 	/**
 	 * Registers the routes for terms.
 	 *
 	 * @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(),
 				),
 				array(
 					'methods'             => WP_REST_Server::CREATABLE,
 					'callback'            => array( $this, 'create_item' ),
 					'permission_callback' => array( $this, 'create_item_permissions_check' ),
 					'args'                => $this->get_endpoint_args_for_item_schema( WP_REST_Server::CREATABLE ),
 				),
 				'schema' => array( $this, 'get_public_item_schema' ),
 			)
 		);
 
 		register_rest_route(
 			$this->namespace,
 			'/' . $this->rest_base . '/(?P<id>[\d]+)',
 			array(
 				'args'   => array(
 					'id' => array(
 						'description' => __( 'Unique identifier for the term.' ),
 						'type'        => 'integer',
 					),
 				),
 				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' ) ),
 					),
 				),
 				array(
 					'methods'             => WP_REST_Server::EDITABLE,
 					'callback'            => array( $this, 'update_item' ),
 					'permission_callback' => array( $this, 'update_item_permissions_check' ),
 					'args'                => $this->get_endpoint_args_for_item_schema( WP_REST_Server::EDITABLE ),
 				),
 				array(
 					'methods'             => WP_REST_Server::DELETABLE,
 					'callback'            => array( $this, 'delete_item' ),
 					'permission_callback' => array( $this, 'delete_item_permissions_check' ),
 					'args'                => array(
 						'force' => array(
 							'type'        => 'boolean',
 							'default'     => false,
 							'description' => __( 'Required to be true, as terms do not support trashing.' ),
 						),
 					),
 				),
 				'schema' => array( $this, 'get_public_item_schema' ),
 			)
 		);
 	}
 
 	/**
 	 * Checks if a request has access to read terms in the specified 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, otherwise false or WP_Error object.
 	 */
 	public function get_items_permissions_check( $request ) {
 		$tax_obj = get_taxonomy( $this->taxonomy );
 
 		if ( ! $tax_obj || ! $this->check_is_taxonomy_allowed( $this->taxonomy ) ) {
 			return false;
 		}
 
 		if ( 'edit' === $request['context'] && ! current_user_can( $tax_obj->cap->edit_terms ) ) {
 			return new WP_Error(
 				'rest_forbidden_context',
 				__( 'Sorry, you are not allowed to edit terms in this taxonomy.' ),
 				array( 'status' => rest_authorization_required_code() )
 			);
 		}
 
 		return true;
 	}
 
 	/**
 	 * Retrieves terms associated with a 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_items( $request ) {
 
 		// Retrieve the list of registered collection query parameters.
 		$registered = $this->get_collection_params();
 
 		/*
 		 * This array defines mappings between public API query parameters whose
 		 * values are accepted as-passed, and their internal WP_Query parameter
 		 * name equivalents (some are the same). Only values which are also
 		 * present in $registered will be set.
 		 */
 		$parameter_mappings = array(
 			'exclude'    => 'exclude',
 			'include'    => 'include',
 			'order'      => 'order',
 			'orderby'    => 'orderby',
 			'post'       => 'post',
 			'hide_empty' => 'hide_empty',
 			'per_page'   => 'number',
 			'search'     => 'search',
 			'slug'       => 'slug',
 		);
 
 		$prepared_args = array( 'taxonomy' => $this->taxonomy );
 
 		/*
 		 * For each known parameter which is both registered and present in the request,
 		 * set the parameter's value on the query $prepared_args.
 		 */
 		foreach ( $parameter_mappings as $api_param => $wp_param ) {
 			if ( isset( $registered[ $api_param ], $request[ $api_param ] ) ) {
 				$prepared_args[ $wp_param ] = $request[ $api_param ];
 			}
 		}
 
 		if ( isset( $prepared_args['orderby'] ) && isset( $request['orderby'] ) ) {
 			$orderby_mappings = array(
 				'include_slugs' => 'slug__in',
 			);
 
 			if ( isset( $orderby_mappings[ $request['orderby'] ] ) ) {
 				$prepared_args['orderby'] = $orderby_mappings[ $request['orderby'] ];
 			}
 		}
 
 		if ( isset( $registered['offset'] ) && ! empty( $request['offset'] ) ) {
 			$prepared_args['offset'] = $request['offset'];
 		} else {
 			$prepared_args['offset'] = ( $request['page'] - 1 ) * $prepared_args['number'];
 		}
 
 		$taxonomy_obj = get_taxonomy( $this->taxonomy );
 
 		if ( $taxonomy_obj->hierarchical && isset( $registered['parent'], $request['parent'] ) ) {
 			if ( 0 === $request['parent'] ) {
 				// Only query top-level terms.
 				$prepared_args['parent'] = 0;
 			} else {
 				if ( $request['parent'] ) {
 					$prepared_args['parent'] = $request['parent'];
 				}
 			}
 		}
 
 		/**
 		 * Filters get_terms() arguments when querying terms via the REST API.
 		 *
 		 * The dynamic portion of the hook name, `$this->taxonomy`, refers to the taxonomy slug.
 		 *
 		 * Possible hook names include:
 		 *
 		 *  - `rest_category_query`
 		 *  - `rest_post_tag_query`
 		 *
 		 * Enables adding extra arguments or setting defaults for a terms
 		 * collection request.
 		 *
 		 * @since 4.7.0
 		 *
 		 * @link https://developer.wordpress.org/reference/functions/get_terms/
 		 *
 		 * @param array           $prepared_args Array of arguments for get_terms().
 		 * @param WP_REST_Request $request       The REST API request.
 		 */
 		$prepared_args = apply_filters( "rest_{$this->taxonomy}_query", $prepared_args, $request );
 
 		if ( ! empty( $prepared_args['post'] ) ) {
 			$query_result = wp_get_object_terms( $prepared_args['post'], $this->taxonomy, $prepared_args );
 
 			// Used when calling wp_count_terms() below.
 			$prepared_args['object_ids'] = $prepared_args['post'];
 		} else {
 			$query_result = get_terms( $prepared_args );
 		}
 
 		$count_args = $prepared_args;
 
 		unset( $count_args['number'], $count_args['offset'] );
 
 		$total_terms = wp_count_terms( $count_args );
 
 		// wp_count_terms() can return a falsey value when the term has no children.
 		if ( ! $total_terms ) {
 			$total_terms = 0;
 		}
 
 		$response = array();
 
 		foreach ( $query_result as $term ) {
 			$data       = $this->prepare_item_for_response( $term, $request );
 			$response[] = $this->prepare_response_for_collection( $data );
 		}
 
 		$response = rest_ensure_response( $response );
 
 		// Store pagination values for headers.
 		$per_page = (int) $prepared_args['number'];
 		$page     = ceil( ( ( (int) $prepared_args['offset'] ) / $per_page ) + 1 );
 
 		$response->header( 'X-WP-Total', (int) $total_terms );
 
 		$max_pages = ceil( $total_terms / $per_page );
 
 		$response->header( 'X-WP-TotalPages', (int) $max_pages );
 
 		$base = add_query_arg( urlencode_deep( $request->get_query_params() ), rest_url( $this->namespace . '/' . $this->rest_base ) );
 		if ( $page > 1 ) {
 			$prev_page = $page - 1;
 
 			if ( $prev_page > $max_pages ) {
 				$prev_page = $max_pages;
 			}
 
 			$prev_link = add_query_arg( 'page', $prev_page, $base );
 			$response->link_header( 'prev', $prev_link );
 		}
 		if ( $max_pages > $page ) {
 			$next_page = $page + 1;
 			$next_link = add_query_arg( 'page', $next_page, $base );
 
 			$response->link_header( 'next', $next_link );
 		}
 
 		return $response;
 	}
 
 	/**
 	 * Get the term, if the ID is valid.
 	 *
 	 * @since 4.7.2
 	 *
 	 * @param int $id Supplied ID.
 	 * @return WP_Term|WP_Error Term object if ID is valid, WP_Error otherwise.
 	 */
 	protected function get_term( $id ) {
 		$error = new WP_Error(
 			'rest_term_invalid',
 			__( 'Term does not exist.' ),
 			array( 'status' => 404 )
 		);
 
 		if ( ! $this->check_is_taxonomy_allowed( $this->taxonomy ) ) {
 			return $error;
 		}
 
 		if ( (int) $id <= 0 ) {
 			return $error;
 		}
 
 		$term = get_term( (int) $id, $this->taxonomy );
 		if ( empty( $term ) || $term->taxonomy !== $this->taxonomy ) {
 			return $error;
 		}
 
 		return $term;
 	}
 
 	/**
 	 * Checks if a request has access to read or edit the specified term.
 	 *
 	 * @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 ) {
 		$term = $this->get_term( $request['id'] );
 
 		if ( is_wp_error( $term ) ) {
 			return $term;
 		}
 
 		if ( 'edit' === $request['context'] && ! current_user_can( 'edit_term', $term->term_id ) ) {
 			return new WP_Error(
 				'rest_forbidden_context',
 				__( 'Sorry, you are not allowed to edit this term.' ),
 				array( 'status' => rest_authorization_required_code() )
 			);
 		}
 
 		return true;
 	}
 
 	/**
 	 * Gets a single term from a 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 ) {
 		$term = $this->get_term( $request['id'] );
 		if ( is_wp_error( $term ) ) {
 			return $term;
 		}
 
 		$response = $this->prepare_item_for_response( $term, $request );
 
 		return rest_ensure_response( $response );
 	}
 
 	/**
 	 * Checks if a request has access to create a term.
 	 *
 	 * @since 4.7.0
 	 *
 	 * @param WP_REST_Request $request Full details about the request.
 	 * @return true|WP_Error True if the request has access to create items, false or WP_Error object otherwise.
 	 */
 	public function create_item_permissions_check( $request ) {
 
 		if ( ! $this->check_is_taxonomy_allowed( $this->taxonomy ) ) {
 			return false;
 		}
 
 		$taxonomy_obj = get_taxonomy( $this->taxonomy );
 
 		if ( ( is_taxonomy_hierarchical( $this->taxonomy )
 				&& ! current_user_can( $taxonomy_obj->cap->edit_terms ) )
 			|| ( ! is_taxonomy_hierarchical( $this->taxonomy )
 				&& ! current_user_can( $taxonomy_obj->cap->assign_terms ) ) ) {
 			return new WP_Error(
 				'rest_cannot_create',
 				__( 'Sorry, you are not allowed to create terms in this taxonomy.' ),
 				array( 'status' => rest_authorization_required_code() )
 			);
 		}
 
 		return true;
 	}
 
 	/**
 	 * Creates a single term in a 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 create_item( $request ) {
 		if ( isset( $request['parent'] ) ) {
 			if ( ! is_taxonomy_hierarchical( $this->taxonomy ) ) {
 				return new WP_Error(
 					'rest_taxonomy_not_hierarchical',
 					__( 'Cannot set parent term, taxonomy is not hierarchical.' ),
 					array( 'status' => 400 )
 				);
 			}
 
 			$parent = get_term( (int) $request['parent'], $this->taxonomy );
 
 			if ( ! $parent ) {
 				return new WP_Error(
 					'rest_term_invalid',
 					__( 'Parent term does not exist.' ),
 					array( 'status' => 400 )
 				);
 			}
 		}
 
 		$prepared_term = $this->prepare_item_for_database( $request );
 
 		$term = wp_insert_term( wp_slash( $prepared_term->name ), $this->taxonomy, wp_slash( (array) $prepared_term ) );
 		if ( is_wp_error( $term ) ) {
 			/*
 			 * If we're going to inform the client that the term already exists,
 			 * give them the identifier for future use.
 			 */
 			$term_id = $term->get_error_data( 'term_exists' );
 			if ( $term_id ) {
 				$existing_term = get_term( $term_id, $this->taxonomy );
 				$term->add_data( $existing_term->term_id, 'term_exists' );
 				$term->add_data(
 					array(
 						'status'  => 400,
 						'term_id' => $term_id,
 					)
 				);
 			}
 
 			return $term;
 		}
 
 		$term = get_term( $term['term_id'], $this->taxonomy );
 
 		/**
 		 * Fires after a single term is created or updated via the REST API.
 		 *
 		 * The dynamic portion of the hook name, `$this->taxonomy`, refers to the taxonomy slug.
 		 *
 		 * Possible hook names include:
 		 *
 		 *  - `rest_insert_category`
 		 *  - `rest_insert_post_tag`
 		 *
 		 * @since 4.7.0
 		 *
 		 * @param WP_Term         $term     Inserted or updated term object.
 		 * @param WP_REST_Request $request  Request object.
 		 * @param bool            $creating True when creating a term, false when updating.
 		 */
 		do_action( "rest_insert_{$this->taxonomy}", $term, $request, true );
 
 		$schema = $this->get_item_schema();
 		if ( ! empty( $schema['properties']['meta'] ) && isset( $request['meta'] ) ) {
 			$meta_update = $this->meta->update_value( $request['meta'], $term->term_id );
 
 			if ( is_wp_error( $meta_update ) ) {
 				return $meta_update;
 			}
 		}
 
 		$fields_update = $this->update_additional_fields_for_object( $term, $request );
 
 		if ( is_wp_error( $fields_update ) ) {
 			return $fields_update;
 		}
 
 		$request->set_param( 'context', 'edit' );
 
 		/**
 		 * Fires after a single term is completely created or updated via the REST API.
 		 *
 		 * The dynamic portion of the hook name, `$this->taxonomy`, refers to the taxonomy slug.
 		 *
 		 * Possible hook names include:
 		 *
 		 *  - `rest_after_insert_category`
 		 *  - `rest_after_insert_post_tag`
 		 *
 		 * @since 5.0.0
 		 *
 		 * @param WP_Term         $term     Inserted or updated term object.
 		 * @param WP_REST_Request $request  Request object.
 		 * @param bool            $creating True when creating a term, false when updating.
 		 */
 		do_action( "rest_after_insert_{$this->taxonomy}", $term, $request, true );
 
 		$response = $this->prepare_item_for_response( $term, $request );
 		$response = rest_ensure_response( $response );
 
 		$response->set_status( 201 );
 		$response->header( 'Location', rest_url( $this->namespace . '/' . $this->rest_base . '/' . $term->term_id ) );
 
 		return $response;
 	}
 
 	/**
 	 * Checks if a request has access to update the specified term.
 	 *
 	 * @since 4.7.0
 	 *
 	 * @param WP_REST_Request $request Full details about the request.
 	 * @return true|WP_Error True if the request has access to update the item, false or WP_Error object otherwise.
 	 */
 	public function update_item_permissions_check( $request ) {
 		$term = $this->get_term( $request['id'] );
 
 		if ( is_wp_error( $term ) ) {
 			return $term;
 		}
 
 		if ( ! current_user_can( 'edit_term', $term->term_id ) ) {
 			return new WP_Error(
 				'rest_cannot_update',
 				__( 'Sorry, you are not allowed to edit this term.' ),
 				array( 'status' => rest_authorization_required_code() )
 			);
 		}
 
 		return true;
 	}
 
 	/**
 	 * Updates a single term from a 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 update_item( $request ) {
 		$term = $this->get_term( $request['id'] );
 		if ( is_wp_error( $term ) ) {
 			return $term;
 		}
 
 		if ( isset( $request['parent'] ) ) {
 			if ( ! is_taxonomy_hierarchical( $this->taxonomy ) ) {
 				return new WP_Error(
 					'rest_taxonomy_not_hierarchical',
 					__( 'Cannot set parent term, taxonomy is not hierarchical.' ),
 					array( 'status' => 400 )
 				);
 			}
 
 			$parent = get_term( (int) $request['parent'], $this->taxonomy );
 
 			if ( ! $parent ) {
 				return new WP_Error(
 					'rest_term_invalid',
 					__( 'Parent term does not exist.' ),
 					array( 'status' => 400 )
 				);
 			}
 		}
 
 		$prepared_term = $this->prepare_item_for_database( $request );
 
 		// Only update the term if we have something to update.
 		if ( ! empty( $prepared_term ) ) {
 			$update = wp_update_term( $term->term_id, $term->taxonomy, wp_slash( (array) $prepared_term ) );
 
 			if ( is_wp_error( $update ) ) {
 				return $update;
 			}
 		}
 
 		$term = get_term( $term->term_id, $this->taxonomy );
 
 		/** This action is documented in wp-includes/rest-api/endpoints/class-wp-rest-terms-controller.php */
 		do_action( "rest_insert_{$this->taxonomy}", $term, $request, false );
 
 		$schema = $this->get_item_schema();
 		if ( ! empty( $schema['properties']['meta'] ) && isset( $request['meta'] ) ) {
 			$meta_update = $this->meta->update_value( $request['meta'], $term->term_id );
 
 			if ( is_wp_error( $meta_update ) ) {
 				return $meta_update;
 			}
 		}
 
 		$fields_update = $this->update_additional_fields_for_object( $term, $request );
 
 		if ( is_wp_error( $fields_update ) ) {
 			return $fields_update;
 		}
 
 		$request->set_param( 'context', 'edit' );
 
 		/** This action is documented in wp-includes/rest-api/endpoints/class-wp-rest-terms-controller.php */
 		do_action( "rest_after_insert_{$this->taxonomy}", $term, $request, false );
 
 		$response = $this->prepare_item_for_response( $term, $request );
 
 		return rest_ensure_response( $response );
 	}
 
 	/**
 	 * Checks if a request has access to delete the specified term.
 	 *
 	 * @since 4.7.0
 	 *
 	 * @param WP_REST_Request $request Full details about the request.
 	 * @return true|WP_Error True if the request has access to delete the item, otherwise false or WP_Error object.
 	 */
 	public function delete_item_permissions_check( $request ) {
 		$term = $this->get_term( $request['id'] );
 
 		if ( is_wp_error( $term ) ) {
 			return $term;
 		}
 
 		if ( ! current_user_can( 'delete_term', $term->term_id ) ) {
 			return new WP_Error(
 				'rest_cannot_delete',
 				__( 'Sorry, you are not allowed to delete this term.' ),
 				array( 'status' => rest_authorization_required_code() )
 			);
 		}
 
 		return true;
 	}
 
 	/**
 	 * Deletes a single term from a 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 delete_item( $request ) {
 		$term = $this->get_term( $request['id'] );
 		if ( is_wp_error( $term ) ) {
 			return $term;
 		}
 
 		$force = isset( $request['force'] ) ? (bool) $request['force'] : false;
 
 		// We don't support trashing for terms.
 		if ( ! $force ) {
 			return new WP_Error(
 				'rest_trash_not_supported',
 				/* translators: %s: force=true */
 				sprintf( __( "Terms do not support trashing. Set '%s' to delete." ), 'force=true' ),
 				array( 'status' => 501 )
 			);
 		}
 
 		$request->set_param( 'context', 'view' );
 
 		$previous = $this->prepare_item_for_response( $term, $request );
 
 		$retval = wp_delete_term( $term->term_id, $term->taxonomy );
 
 		if ( ! $retval ) {
 			return new WP_Error(
 				'rest_cannot_delete',
 				__( 'The term cannot be deleted.' ),
 				array( 'status' => 500 )
 			);
 		}
 
 		$response = new WP_REST_Response();
 		$response->set_data(
 			array(
 				'deleted'  => true,
 				'previous' => $previous->get_data(),
 			)
 		);
 
 		/**
 		 * Fires after a single term is deleted via the REST API.
 		 *
 		 * The dynamic portion of the hook name, `$this->taxonomy`, refers to the taxonomy slug.
 		 *
 		 * Possible hook names include:
 		 *
 		 *  - `rest_delete_category`
 		 *  - `rest_delete_post_tag`
 		 *
 		 * @since 4.7.0
 		 *
 		 * @param WP_Term          $term     The deleted term.
 		 * @param WP_REST_Response $response The response data.
 		 * @param WP_REST_Request  $request  The request sent to the API.
 		 */
 		do_action( "rest_delete_{$this->taxonomy}", $term, $response, $request );
 
 		return $response;
 	}
 
 	/**
 	 * Prepares a single term for create or update.
 	 *
 	 * @since 4.7.0
 	 *
 	 * @param WP_REST_Request $request Request object.
 	 * @return object Term object.
 	 */
 	public function prepare_item_for_database( $request ) {
 		$prepared_term = new stdClass;
 
 		$schema = $this->get_item_schema();
 		if ( isset( $request['name'] ) && ! empty( $schema['properties']['name'] ) ) {
 			$prepared_term->name = $request['name'];
 		}
 
 		if ( isset( $request['slug'] ) && ! empty( $schema['properties']['slug'] ) ) {
 			$prepared_term->slug = $request['slug'];
 		}
 
 		if ( isset( $request['taxonomy'] ) && ! empty( $schema['properties']['taxonomy'] ) ) {
 			$prepared_term->taxonomy = $request['taxonomy'];
 		}
 
 		if ( isset( $request['description'] ) && ! empty( $schema['properties']['description'] ) ) {
 			$prepared_term->description = $request['description'];
 		}
 
 		if ( isset( $request['parent'] ) && ! empty( $schema['properties']['parent'] ) ) {
 			$parent_term_id   = 0;
 			$requested_parent = (int) $request['parent'];
 
 			if ( $requested_parent ) {
 				$parent_term = get_term( $requested_parent, $this->taxonomy );
 
 				if ( $parent_term instanceof WP_Term ) {
 					$parent_term_id = $parent_term->term_id;
 				}
 			}
 
 			$prepared_term->parent = $parent_term_id;
 		}
 
 		/**
 		 * Filters term data before inserting term via the REST API.
 		 *
 		 * The dynamic portion of the hook name, `$this->taxonomy`, refers to the taxonomy slug.
 		 *
 		 * Possible hook names include:
 		 *
 		 *  - `rest_pre_insert_category`
 		 *  - `rest_pre_insert_post_tag`
 		 *
 		 * @since 4.7.0
 		 *
 		 * @param object          $prepared_term Term object.
 		 * @param WP_REST_Request $request       Request object.
 		 */
 		return apply_filters( "rest_pre_insert_{$this->taxonomy}", $prepared_term, $request );
 	}
 
 	/**
 	 * Prepares a single term output for response.
 	 *
 	 * @since 4.7.0
 	 *
 	 * @param WP_Term         $item    Term object.
 	 * @param WP_REST_Request $request Request object.
 	 * @return WP_REST_Response Response object.
 	 */
 	public function prepare_item_for_response( $item, $request ) {
 
 		$fields = $this->get_fields_for_response( $request );
 		$data   = array();
 
 		if ( in_array( 'id', $fields, true ) ) {
 			$data['id'] = (int) $item->term_id;
 		}
 
 		if ( in_array( 'count', $fields, true ) ) {
 			$data['count'] = (int) $item->count;
 		}
 
 		if ( in_array( 'description', $fields, true ) ) {
 			$data['description'] = $item->description;
 		}
 
 		if ( in_array( 'link', $fields, true ) ) {
 			$data['link'] = get_term_link( $item );
 		}
 
 		if ( in_array( 'name', $fields, true ) ) {
 			$data['name'] = $item->name;
 		}
 
 		if ( in_array( 'slug', $fields, true ) ) {
 			$data['slug'] = $item->slug;
 		}
 
 		if ( in_array( 'taxonomy', $fields, true ) ) {
 			$data['taxonomy'] = $item->taxonomy;
 		}
 
 		if ( in_array( 'parent', $fields, true ) ) {
 			$data['parent'] = (int) $item->parent;
 		}
 
 		if ( in_array( 'meta', $fields, true ) ) {
 			$data['meta'] = $this->meta->get_value( $item->term_id, $request );
 		}
 
 		$context = ! empty( $request['context'] ) ? $request['context'] : 'view';
 		$data    = $this->add_additional_fields_to_object( $data, $request );
 		$data    = $this->filter_response_by_context( $data, $context );
 
 		$response = rest_ensure_response( $data );
 
 		$response->add_links( $this->prepare_links( $item ) );
 
 		/**
 		 * Filters the term data for a REST API response.
 		 *
 		 * The dynamic portion of the hook name, `$this->taxonomy`, refers to the taxonomy slug.
 		 *
 		 * Possible hook names include:
 		 *
 		 *  - `rest_prepare_category`
 		 *  - `rest_prepare_post_tag`
 		 *
 		 * Allows modification of the term data right before it is returned.
 		 *
 		 * @since 4.7.0
 		 *
 		 * @param WP_REST_Response  $response  The response object.
 		 * @param WP_Term           $item      The original term object.
 		 * @param WP_REST_Request   $request   Request used to generate the response.
 		 */
 		return apply_filters( "rest_prepare_{$this->taxonomy}", $response, $item, $request );
 	}
 
 	/**
 	 * Prepares links for the request.
 	 *
 	 * @since 4.7.0
 	 *
 	 * @param WP_Term $term Term object.
 	 * @return array Links for the given term.
 	 */
 	protected function prepare_links( $term ) {
 		$base  = $this->namespace . '/' . $this->rest_base;
 		$links = array(
 			'self'       => array(
 				'href' => rest_url( trailingslashit( $base ) . $term->term_id ),
 			),
 			'collection' => array(
 				'href' => rest_url( $base ),
 			),
 			'about'      => array(
 				'href' => rest_url( sprintf( 'wp/v2/taxonomies/%s', $this->taxonomy ) ),
 			),
 		);
 
 		if ( $term->parent ) {
 			$parent_term = get_term( (int) $term->parent, $term->taxonomy );
 
 			if ( $parent_term ) {
 				$links['up'] = array(
 					'href'       => rest_url( trailingslashit( $base ) . $parent_term->term_id ),
 					'embeddable' => true,
 				);
 			}
 		}
 
 		$taxonomy_obj = get_taxonomy( $term->taxonomy );
 
 		if ( empty( $taxonomy_obj->object_type ) ) {
 			return $links;
 		}
 
 		$post_type_links = array();
 
 		foreach ( $taxonomy_obj->object_type as $type ) {
 			$post_type_object = get_post_type_object( $type );
 
 			if ( empty( $post_type_object->show_in_rest ) ) {
 				continue;
 			}
 
 			$rest_base         = ! empty( $post_type_object->rest_base ) ? $post_type_object->rest_base : $post_type_object->name;
 			$post_type_links[] = array(
 				'href' => add_query_arg( $this->rest_base, $term->term_id, rest_url( sprintf( 'wp/v2/%s', $rest_base ) ) ),
 			);
 		}
 
 		if ( ! empty( $post_type_links ) ) {
 			$links['https://api.w.org/post_type'] = $post_type_links;
 		}
 
 		return $links;
 	}
 
 	/**
 	 * Retrieves the term's schema, conforming to JSON Schema.
 	 *
 	 * @since 4.7.0
 	 *
 	 * @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'      => 'post_tag' === $this->taxonomy ? 'tag' : $this->taxonomy,
 			'type'       => 'object',
 			'properties' => array(
 				'id'          => array(
 					'description' => __( 'Unique identifier for the term.' ),
 					'type'        => 'integer',
 					'context'     => array( 'view', 'embed', 'edit' ),
 					'readonly'    => true,
 				),
 				'count'       => array(
 					'description' => __( 'Number of published posts for the term.' ),
 					'type'        => 'integer',
 					'context'     => array( 'view', 'edit' ),
 					'readonly'    => true,
 				),
 				'description' => array(
 					'description' => __( 'HTML description of the term.' ),
 					'type'        => 'string',
 					'context'     => array( 'view', 'edit' ),
 				),
 				'link'        => array(
 					'description' => __( 'URL of the term.' ),
 					'type'        => 'string',
 					'format'      => 'uri',
 					'context'     => array( 'view', 'embed', 'edit' ),
 					'readonly'    => true,
 				),
 				'name'        => array(
 					'description' => __( 'HTML title for the term.' ),
 					'type'        => 'string',
 					'context'     => array( 'view', 'embed', 'edit' ),
 					'arg_options' => array(
 						'sanitize_callback' => 'sanitize_text_field',
 					),
 					'required'    => true,
 				),
 				'slug'        => array(
 					'description' => __( 'An alphanumeric identifier for the term unique to its type.' ),
 					'type'        => 'string',
 					'context'     => array( 'view', 'embed', 'edit' ),
 					'arg_options' => array(
 						'sanitize_callback' => array( $this, 'sanitize_slug' ),
 					),
 				),
 				'taxonomy'    => array(
 					'description' => __( 'Type attribution for the term.' ),
 					'type'        => 'string',
 					'enum'        => array( $this->taxonomy ),
 					'context'     => array( 'view', 'embed', 'edit' ),
 					'readonly'    => true,
 				),
 			),
 		);
 
 		$taxonomy = get_taxonomy( $this->taxonomy );
 
 		if ( $taxonomy->hierarchical ) {
 			$schema['properties']['parent'] = array(
 				'description' => __( 'The parent term ID.' ),
 				'type'        => 'integer',
 				'context'     => array( 'view', 'edit' ),
 			);
 		}
 
 		$schema['properties']['meta'] = $this->meta->get_field_schema();
 
 		$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() {
 		$query_params = parent::get_collection_params();
 		$taxonomy     = get_taxonomy( $this->taxonomy );
 
 		$query_params['context']['default'] = 'view';
 
 		$query_params['exclude'] = array(
 			'description' => __( 'Ensure result set excludes specific IDs.' ),
 			'type'        => 'array',
 			'items'       => array(
 				'type' => 'integer',
 			),
 			'default'     => array(),
 		);
 
 		$query_params['include'] = array(
 			'description' => __( 'Limit result set to specific IDs.' ),
 			'type'        => 'array',
 			'items'       => array(
 				'type' => 'integer',
 			),
 			'default'     => array(),
 		);
 
 		if ( ! $taxonomy->hierarchical ) {
 			$query_params['offset'] = array(
 				'description' => __( 'Offset the result set by a specific number of items.' ),
 				'type'        => 'integer',
 			);
 		}
 
 		$query_params['order'] = array(
 			'description' => __( 'Order sort attribute ascending or descending.' ),
 			'type'        => 'string',
 			'default'     => 'asc',
 			'enum'        => array(
 				'asc',
 				'desc',
 			),
 		);
 
 		$query_params['orderby'] = array(
 			'description' => __( 'Sort collection by term attribute.' ),
 			'type'        => 'string',
 			'default'     => 'name',
 			'enum'        => array(
 				'id',
 				'include',
 				'name',
 				'slug',
 				'include_slugs',
 				'term_group',
 				'description',
 				'count',
 			),
 		);
 
 		$query_params['hide_empty'] = array(
 			'description' => __( 'Whether to hide terms not assigned to any posts.' ),
 			'type'        => 'boolean',
 			'default'     => false,
 		);
 
 		if ( $taxonomy->hierarchical ) {
 			$query_params['parent'] = array(
 				'description' => __( 'Limit result set to terms assigned to a specific parent.' ),
 				'type'        => 'integer',
 			);
 		}
 
 		$query_params['post'] = array(
 			'description' => __( 'Limit result set to terms assigned to a specific post.' ),
 			'type'        => 'integer',
 			'default'     => null,
 		);
 
 		$query_params['slug'] = array(
 			'description' => __( 'Limit result set to terms with one or more specific slugs.' ),
 			'type'        => 'array',
 			'items'       => array(
 				'type' => 'string',
 			),
 		);
 
 		/**
 		 * Filters collection parameters for the terms controller.
 		 *
 		 * The dynamic part of the filter `$this->taxonomy` refers to the taxonomy
 		 * slug for the controller.
 		 *
 		 * This filter registers the collection parameter, but does not map the
 		 * collection parameter to an internal WP_Term_Query parameter.  Use the
 		 * `rest_{$this->taxonomy}_query` filter to set WP_Term_Query parameters.
 		 *
 		 * @since 4.7.0
 		 *
 		 * @param array       $query_params JSON Schema-formatted collection parameters.
 		 * @param WP_Taxonomy $taxonomy     Taxonomy object.
 		 */
 		return apply_filters( "rest_{$this->taxonomy}_collection_params", $query_params, $taxonomy );
 	}
 
 	/**
 	 * Checks that the taxonomy is valid.
 	 *
 	 * @since 4.7.0
 	 *
 	 * @param string $taxonomy Taxonomy to check.
 	 * @return bool Whether the taxonomy is allowed for REST management.
 	 */
 	protected function check_is_taxonomy_allowed( $taxonomy ) {
 		$taxonomy_obj = get_taxonomy( $taxonomy );
 		if ( $taxonomy_obj && ! empty( $taxonomy_obj->show_in_rest ) ) {
 			return true;
 		}
 		return false;
 	}
 }