X-Git-Url: https://scripts.mit.edu/gitweb/autoinstalls/wordpress.git/blobdiff_plain/8d3bb1a5dcfdea9857d3c88c3751f09593e34dc8..ef91a7f4f3c6468973e192335a27ec0e0faca0b5:/wp-includes/rest-api/endpoints/class-wp-rest-terms-controller.php

diff --git a/wp-includes/rest-api/endpoints/class-wp-rest-terms-controller.php b/wp-includes/rest-api/endpoints/class-wp-rest-terms-controller.php
new file mode 100644
index 00000000..6ca86ca1
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+++ b/wp-includes/rest-api/endpoints/class-wp-rest-terms-controller.php
@@ -0,0 +1,996 @@
+<?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
+	 * @access protected
+	 * @var string
+	 */
+	protected $taxonomy;
+
+	/**
+	 * Instance of a term meta fields object.
+	 *
+	 * @since 4.7.0
+	 * @access protected
+	 * @var WP_REST_Term_Meta_Fields
+	 */
+	protected $meta;
+
+	/**
+	 * Column to have the terms be sorted by.
+	 *
+	 * @since 4.7.0
+	 * @access protected
+	 * @var string
+	 */
+	protected $sort_column;
+
+	/**
+	 * Number of terms that were found.
+	 *
+	 * @since 4.7.0
+	 * @access protected
+	 * @var int
+	 */
+	protected $total_terms;
+
+	/**
+	 * Constructor.
+	 *
+	 * @since 4.7.0
+	 * @access public
+	 *
+	 * @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 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(),
+			),
+			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(
+			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
+	 * @access public
+	 *
+	 * @param WP_REST_Request $request Full details about the request.
+	 * @return bool|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
+	 * @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_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();
+
+		/*
+		 * 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( $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'] = $request['parent'];
+				}
+			}
+		}
+
+		/**
+		 * Filters the query arguments before passing them to get_terms().
+		 *
+		 * The dynamic portion of the hook name, `$this->taxonomy`, refers to the taxonomy slug.
+		 *
+		 * 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 to be
+		 *                                       passed to get_terms().
+		 * @param WP_REST_Request $request       The current 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( $this->taxonomy, $prepared_args );
+		}
+
+		$count_args = $prepared_args;
+
+		unset( $count_args['number'], $count_args['offset'] );
+
+		$total_terms = wp_count_terms( $this->taxonomy, $count_args );
+
+		// wp_count_terms can return a falsy 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( $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;
+	}
+
+	/**
+	 * Checks if a request has access to read or edit the specified term.
+	 *
+	 * @since 4.7.0
+	 * @access public
+	 *
+	 * @param WP_REST_Request $request Full details about the request.
+	 * @return bool|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( $this->taxonomy );
+		if ( ! $tax_obj || ! $this->check_is_taxonomy_allowed( $this->taxonomy ) ) {
+			return false;
+		}
+		if ( 'edit' === $request['context'] && ! current_user_can( 'edit_term', (int) $request['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
+	 * @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 ) {
+
+		$term = get_term( (int) $request['id'], $this->taxonomy );
+
+		if ( ! $term || $term->taxonomy !== $this->taxonomy ) {
+			return new WP_Error( 'rest_term_invalid', __( "Term doesn't exist." ), array( 'status' => 404 ) );
+		}
+
+		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
+	 * @access public
+	 *
+	 * @param WP_REST_Request $request Full details about the request.
+	 * @return bool|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 ( ! current_user_can( $taxonomy_obj->cap->edit_terms ) ) {
+			return new WP_Error( 'rest_cannot_create', __( 'Sorry, you are not allowed to create new terms.' ), array( 'status' => rest_authorization_required_code() ) );
+		}
+
+		return true;
+	}
+
+	/**
+	 * Creates a single term in a 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 create_item( $request ) {
+		if ( isset( $request['parent'] ) ) {
+			if ( ! is_taxonomy_hierarchical( $this->taxonomy ) ) {
+				return new WP_Error( 'rest_taxonomy_not_hierarchical', __( 'Can not 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 doesn't 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.
+			 */
+			if ( $term_id = $term->get_error_data( 'term_exists' ) ) {
+				$existing_term = get_term( $term_id, $this->taxonomy );
+				$term->add_data( $existing_term->term_id, 'term_exists' );
+			}
+
+			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.
+		 *
+		 * @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'], (int) $request['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', 'view' );
+
+		$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
+	 * @access public
+	 *
+	 * @param WP_REST_Request $request Full details about the request.
+	 * @return bool|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 ) {
+
+		if ( ! $this->check_is_taxonomy_allowed( $this->taxonomy ) ) {
+			return false;
+		}
+
+		$term = get_term( (int) $request['id'], $this->taxonomy );
+
+		if ( ! $term ) {
+			return new WP_Error( 'rest_term_invalid', __( "Term doesn't exist." ), array( 'status' => 404 ) );
+		}
+
+		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
+	 * @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 update_item( $request ) {
+		if ( isset( $request['parent'] ) ) {
+			if ( ! is_taxonomy_hierarchical( $this->taxonomy ) ) {
+				return new WP_Error( 'rest_taxonomy_not_hierarchical', __( 'Can not 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 doesn't exist." ), array( 'status' => 400 ) );
+			}
+		}
+
+		$prepared_term = $this->prepare_item_for_database( $request );
+
+		$term = get_term( (int) $request['id'], $this->taxonomy );
+
+		// Only update the term if we haz 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( (int) $request['id'], $this->taxonomy );
+
+		/* This action is documented in lib/endpoints/class-wp-rest-terms-controller.php */
+		do_action( "rest_insert_{$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'], (int) $request['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', 'view' );
+
+		$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
+	 * @access public
+	 *
+	 * @param WP_REST_Request $request Full details about the request.
+	 * @return bool|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 ) {
+		if ( ! $this->check_is_taxonomy_allowed( $this->taxonomy ) ) {
+			return false;
+		}
+
+		$term = get_term( (int) $request['id'], $this->taxonomy );
+
+		if ( ! $term ) {
+			return new WP_Error( 'rest_term_invalid', __( "Term doesn't exist." ), array( 'status' => 404 ) );
+		}
+
+		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
+	 * @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 delete_item( $request ) {
+
+		$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', __( 'Terms do not support trashing. Set force=true to delete.' ), array( 'status' => 501 ) );
+		}
+
+		$term = get_term( (int) $request['id'], $this->taxonomy );
+
+		$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.
+		 *
+		 * @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
+	 * @access public
+	 *
+	 * @param WP_REST_Request $request Request object.
+	 * @return object $prepared_term 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;
+			$parent_term    = get_term( (int) $request['parent'], $this->taxonomy );
+
+			if ( $parent_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.
+		 *
+		 * @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
+	 * @access public
+	 *
+	 * @param obj             $item    Term object.
+	 * @param WP_REST_Request $request Request object.
+	 * @return WP_REST_Response $response Response object.
+	 */
+	public function prepare_item_for_response( $item, $request ) {
+
+		$schema = $this->get_item_schema();
+		$data   = array();
+
+		if ( ! empty( $schema['properties']['id'] ) ) {
+			$data['id'] = (int) $item->term_id;
+		}
+
+		if ( ! empty( $schema['properties']['count'] ) ) {
+			$data['count'] = (int) $item->count;
+		}
+
+		if ( ! empty( $schema['properties']['description'] ) ) {
+			$data['description'] = $item->description;
+		}
+
+		if ( ! empty( $schema['properties']['link'] ) ) {
+			$data['link'] = get_term_link( $item );
+		}
+
+		if ( ! empty( $schema['properties']['name'] ) ) {
+			$data['name'] = $item->name;
+		}
+
+		if ( ! empty( $schema['properties']['slug'] ) ) {
+			$data['slug'] = $item->slug;
+		}
+
+		if ( ! empty( $schema['properties']['taxonomy'] ) ) {
+			$data['taxonomy'] = $item->taxonomy;
+		}
+
+		if ( ! empty( $schema['properties']['parent'] ) ) {
+			$data['parent'] = (int) $item->parent;
+		}
+
+		if ( ! empty( $schema['properties']['meta'] ) ) {
+			$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( $item ) );
+
+		/**
+		 * Filters a term item returned from the API.
+		 *
+		 * The dynamic portion of the hook name, `$this->taxonomy`, refers to the taxonomy slug.
+		 *
+		 * Allows modification of the term data right before it is returned.
+		 *
+		 * @since 4.7.0
+		 *
+		 * @param WP_REST_Response  $response  The response object.
+		 * @param object            $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
+	 * @access protected
+	 *
+	 * @param object $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
+	 * @access public
+	 *
+	 * @return array Item schema data.
+	 */
+	public function get_item_schema() {
+		$schema = array(
+			'$schema'    => 'http://json-schema.org/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_keys( get_taxonomies() ),
+					'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();
+
+		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() {
+		$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',
+				'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,
+		);
+
+		$query_params['slug'] = array(
+			'description'       => __( 'Limit result set to terms with a specific slug.' ),
+			'type'              => 'string',
+		);
+
+		/**
+		 * Filter collection parameters for the terms controller.
+		 *
+		 * The dynamic part of the filter `$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 $params JSON Schema-formatted collection parameters.
+		 * @param WP_Taxonomy $taxonomy_obj Taxonomy object.
+		 */
+		return apply_filters( 'rest_{$this->taxonomy}_collection_params', $query_params, $taxonomy );
+	}
+
+	/**
+	 * Checks that the taxonomy is valid.
+	 *
+	 * @since 4.7.0
+	 * @access protected
+	 *
+	 * @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;
+	}
+}