wp/wp-includes/rest-api/endpoints/class-wp-rest-users-controller.php
changeset 7 cf61fcea0001
child 9 177826044cd9
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/wp/wp-includes/rest-api/endpoints/class-wp-rest-users-controller.php	Mon Oct 14 17:39:30 2019 +0200
@@ -0,0 +1,1402 @@
+<?php
+/**
+ * REST API: WP_REST_Users_Controller class
+ *
+ * @package WordPress
+ * @subpackage REST_API
+ * @since 4.7.0
+ */
+
+/**
+ * Core class used to manage users via the REST API.
+ *
+ * @since 4.7.0
+ *
+ * @see WP_REST_Controller
+ */
+class WP_REST_Users_Controller extends WP_REST_Controller {
+
+	/**
+	 * Instance of a user meta fields object.
+	 *
+	 * @since 4.7.0
+	 * @var WP_REST_User_Meta_Fields
+	 */
+	protected $meta;
+
+	/**
+	 * Constructor.
+	 *
+	 * @since 4.7.0
+	 */
+	public function __construct() {
+		$this->namespace = 'wp/v2';
+		$this->rest_base = 'users';
+
+		$this->meta = new WP_REST_User_Meta_Fields();
+	}
+
+	/**
+	 * Registers the routes for the objects of the controller.
+	 *
+	 * @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 user.' ),
+					'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 users do not support trashing.' ),
+					),
+					'reassign' => array(
+						'type'        => 'integer',
+						'description' => __( 'Reassign the deleted user\'s posts and links to this user ID.' ),
+						'required'    => true,
+						'sanitize_callback' => array( $this, 'check_reassign' ),
+					),
+				),
+			),
+			'schema' => array( $this, 'get_public_item_schema' ),
+		) );
+
+		register_rest_route( $this->namespace, '/' . $this->rest_base . '/me', array(
+			array(
+				'methods'             => WP_REST_Server::READABLE,
+				'callback'            => array( $this, 'get_current_item' ),
+				'args'                => array(
+					'context' => $this->get_context_param( array( 'default' => 'view' ) ),
+				),
+			),
+			array(
+				'methods'             => WP_REST_Server::EDITABLE,
+				'callback'            => array( $this, 'update_current_item' ),
+				'permission_callback' => array( $this, 'update_current_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_current_item' ),
+				'permission_callback' => array( $this, 'delete_current_item_permissions_check' ),
+				'args'                => array(
+					'force'    => array(
+						'type'        => 'boolean',
+						'default'     => false,
+						'description' => __( 'Required to be true, as users do not support trashing.' ),
+					),
+					'reassign' => array(
+						'type'        => 'integer',
+						'description' => __( 'Reassign the deleted user\'s posts and links to this user ID.' ),
+						'required'    => true,
+						'sanitize_callback' => array( $this, 'check_reassign' ),
+					),
+				),
+			),
+			'schema' => array( $this, 'get_public_item_schema' ),
+		));
+	}
+
+	/**
+	 * Checks for a valid value for the reassign parameter when deleting users.
+	 *
+	 * The value can be an integer, 'false', false, or ''.
+	 *
+	 * @since 4.7.0
+	 *
+	 * @param int|bool        $value   The value passed to the reassign parameter.
+	 * @param WP_REST_Request $request Full details about the request.
+	 * @param string          $param   The parameter that is being sanitized.
+	 *
+	 * @return int|bool|WP_Error
+	 */
+	public function check_reassign( $value, $request, $param ) {
+		if ( is_numeric( $value ) ) {
+			return $value;
+		}
+
+		if ( empty( $value ) || false === $value || 'false' === $value ) {
+			return false;
+		}
+
+		return new WP_Error( 'rest_invalid_param', __( 'Invalid user parameter(s).' ), array( 'status' => 400 ) );
+	}
+
+	/**
+	 * Permissions check for getting all users.
+	 *
+	 * @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 WP_Error object.
+	 */
+	public function get_items_permissions_check( $request ) {
+		// Check if roles is specified in GET request and if user can list users.
+		if ( ! empty( $request['roles'] ) && ! current_user_can( 'list_users' ) ) {
+			return new WP_Error( 'rest_user_cannot_view', __( 'Sorry, you are not allowed to filter users by role.' ), array( 'status' => rest_authorization_required_code() ) );
+		}
+
+		if ( 'edit' === $request['context'] && ! current_user_can( 'list_users' ) ) {
+			return new WP_Error( 'rest_forbidden_context', __( 'Sorry, you are not allowed to list users.' ), array( 'status' => rest_authorization_required_code() ) );
+		}
+
+		if ( in_array( $request['orderby'], array( 'email', 'registered_date' ), true ) && ! current_user_can( 'list_users' ) ) {
+			return new WP_Error( 'rest_forbidden_orderby', __( 'Sorry, you are not allowed to order users by this parameter.' ), array( 'status' => rest_authorization_required_code() ) );
+		}
+
+		if ( 'authors' === $request['who'] ) {
+			$can_view = false;
+			$types = get_post_types( array( 'show_in_rest' => true ), 'objects' );
+			foreach ( $types as $type ) {
+				if ( post_type_supports( $type->name, 'author' )
+					&& current_user_can( $type->cap->edit_posts ) ) {
+					$can_view = true;
+				}
+			}
+			if ( ! $can_view ) {
+				return new WP_Error( 'rest_forbidden_who', __( 'Sorry, you are not allowed to query users by this parameter.' ), array( 'status' => rest_authorization_required_code() ) );
+			}
+		}
+
+		return true;
+	}
+
+	/**
+	 * Retrieves all users.
+	 *
+	 * @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',
+			'per_page' => 'number',
+			'search'   => 'search',
+			'roles'    => 'role__in',
+			'slug'     => 'nicename__in',
+		);
+
+		$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'];
+		}
+
+		if ( isset( $registered['orderby'] ) ) {
+			$orderby_possibles = array(
+				'id'              => 'ID',
+				'include'         => 'include',
+				'name'            => 'display_name',
+				'registered_date' => 'registered',
+				'slug'            => 'user_nicename',
+				'include_slugs'   => 'nicename__in',
+				'email'           => 'user_email',
+				'url'             => 'user_url',
+			);
+			$prepared_args['orderby'] = $orderby_possibles[ $request['orderby'] ];
+		}
+
+		if ( isset( $registered['who'] ) && ! empty( $request['who'] ) && 'authors' === $request['who'] ) {
+			$prepared_args['who'] = 'authors';
+		} elseif ( ! current_user_can( 'list_users' ) ) {
+			$prepared_args['has_published_posts'] = get_post_types( array( 'show_in_rest' => true ), 'names' );
+		}
+
+		if ( ! empty( $prepared_args['search'] ) ) {
+			$prepared_args['search'] = '*' . $prepared_args['search'] . '*';
+		}
+		/**
+		 * Filters WP_User_Query arguments when querying users via the REST API.
+		 *
+		 * @link https://developer.wordpress.org/reference/classes/wp_user_query/
+		 *
+		 * @since 4.7.0
+		 *
+		 * @param array           $prepared_args Array of arguments for WP_User_Query.
+		 * @param WP_REST_Request $request       The current request.
+		 */
+		$prepared_args = apply_filters( 'rest_user_query', $prepared_args, $request );
+
+		$query = new WP_User_Query( $prepared_args );
+
+		$users = array();
+
+		foreach ( $query->results as $user ) {
+			$data = $this->prepare_item_for_response( $user, $request );
+			$users[] = $this->prepare_response_for_collection( $data );
+		}
+
+		$response = rest_ensure_response( $users );
+
+		// Store pagination values for headers then unset for count query.
+		$per_page = (int) $prepared_args['number'];
+		$page     = ceil( ( ( (int) $prepared_args['offset'] ) / $per_page ) + 1 );
+
+		$prepared_args['fields'] = 'ID';
+
+		$total_users = $query->get_total();
+
+		if ( $total_users < 1 ) {
+			// Out-of-bounds, run the query again without LIMIT for total count.
+			unset( $prepared_args['number'], $prepared_args['offset'] );
+			$count_query = new WP_User_Query( $prepared_args );
+			$total_users = $count_query->get_total();
+		}
+
+		$response->header( 'X-WP-Total', (int) $total_users );
+
+		$max_pages = ceil( $total_users / $per_page );
+
+		$response->header( 'X-WP-TotalPages', (int) $max_pages );
+
+		$base = add_query_arg( $request->get_query_params(), rest_url( sprintf( '%s/%s', $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 user, if the ID is valid.
+	 *
+	 * @since 4.7.2
+	 *
+	 * @param int $id Supplied ID.
+	 * @return WP_User|WP_Error True if ID is valid, WP_Error otherwise.
+	 */
+	protected function get_user( $id ) {
+		$error = new WP_Error( 'rest_user_invalid_id', __( 'Invalid user ID.' ), array( 'status' => 404 ) );
+		if ( (int) $id <= 0 ) {
+			return $error;
+		}
+
+		$user = get_userdata( (int) $id );
+		if ( empty( $user ) || ! $user->exists() ) {
+			return $error;
+		}
+
+		if ( is_multisite() && ! is_user_member_of_blog( $user->ID ) ) {
+			return $error;
+		}
+
+		return $user;
+	}
+
+	/**
+	 * Checks if a given request has access to read a user.
+	 *
+	 * @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 WP_Error object.
+	 */
+	public function get_item_permissions_check( $request ) {
+		$user = $this->get_user( $request['id'] );
+		if ( is_wp_error( $user ) ) {
+			return $user;
+		}
+
+		$types = get_post_types( array( 'show_in_rest' => true ), 'names' );
+
+		if ( get_current_user_id() === $user->ID ) {
+			return true;
+		}
+
+		if ( 'edit' === $request['context'] && ! current_user_can( 'list_users' ) ) {
+			return new WP_Error( 'rest_user_cannot_view', __( 'Sorry, you are not allowed to list users.' ), array( 'status' => rest_authorization_required_code() ) );
+		} elseif ( ! count_user_posts( $user->ID, $types ) && ! current_user_can( 'edit_user', $user->ID ) && ! current_user_can( 'list_users' ) ) {
+			return new WP_Error( 'rest_user_cannot_view', __( 'Sorry, you are not allowed to list users.' ), array( 'status' => rest_authorization_required_code() ) );
+		}
+
+		return true;
+	}
+
+	/**
+	 * Retrieves a single user.
+	 *
+	 * @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 ) {
+		$user = $this->get_user( $request['id'] );
+		if ( is_wp_error( $user ) ) {
+			return $user;
+		}
+
+		$user = $this->prepare_item_for_response( $user, $request );
+		$response = rest_ensure_response( $user );
+
+		return $response;
+	}
+
+	/**
+	 * Retrieves the current user.
+	 *
+	 * @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_current_item( $request ) {
+		$current_user_id = get_current_user_id();
+
+		if ( empty( $current_user_id ) ) {
+			return new WP_Error( 'rest_not_logged_in', __( 'You are not currently logged in.' ), array( 'status' => 401 ) );
+		}
+
+		$user     = wp_get_current_user();
+		$response = $this->prepare_item_for_response( $user, $request );
+		$response = rest_ensure_response( $response );
+
+
+		return $response;
+	}
+
+	/**
+	 * Checks if a given request has access create users.
+	 *
+	 * @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, WP_Error object otherwise.
+	 */
+	public function create_item_permissions_check( $request ) {
+
+		if ( ! current_user_can( 'create_users' ) ) {
+			return new WP_Error( 'rest_cannot_create_user', __( 'Sorry, you are not allowed to create new users.' ), array( 'status' => rest_authorization_required_code() ) );
+		}
+
+		return true;
+	}
+
+	/**
+	 * Creates a single user.
+	 *
+	 * @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 ( ! empty( $request['id'] ) ) {
+			return new WP_Error( 'rest_user_exists', __( 'Cannot create existing user.' ), array( 'status' => 400 ) );
+		}
+
+		$schema = $this->get_item_schema();
+
+		if ( ! empty( $request['roles'] ) && ! empty( $schema['properties']['roles'] ) ) {
+			$check_permission = $this->check_role_update( $request['id'], $request['roles'] );
+
+			if ( is_wp_error( $check_permission ) ) {
+				return $check_permission;
+			}
+		}
+
+		$user = $this->prepare_item_for_database( $request );
+
+		if ( is_multisite() ) {
+			$ret = wpmu_validate_user_signup( $user->user_login, $user->user_email );
+
+			if ( is_wp_error( $ret['errors'] ) && ! empty( $ret['errors']->errors ) ) {
+				$error = new WP_Error( 'rest_invalid_param', __( 'Invalid user parameter(s).' ), array( 'status' => 400 ) );
+				foreach ( $ret['errors']->errors as $code => $messages ) {
+					foreach ( $messages as $message ) {
+						$error->add( $code, $message );
+					}
+					if ( $error_data = $error->get_error_data( $code ) ) {
+						$error->add_data( $error_data, $code );
+					}
+				}
+				return $error;
+			}
+		}
+
+		if ( is_multisite() ) {
+			$user_id = wpmu_create_user( $user->user_login, $user->user_pass, $user->user_email );
+
+			if ( ! $user_id ) {
+				return new WP_Error( 'rest_user_create', __( 'Error creating new user.' ), array( 'status' => 500 ) );
+			}
+
+			$user->ID = $user_id;
+			$user_id  = wp_update_user( wp_slash( (array) $user ) );
+
+			if ( is_wp_error( $user_id ) ) {
+				return $user_id;
+			}
+
+			$result= add_user_to_blog( get_site()->id, $user_id, '' );
+			if ( is_wp_error( $result ) ) {
+				return $result;
+			}
+		} else {
+			$user_id = wp_insert_user( wp_slash( (array) $user ) );
+
+			if ( is_wp_error( $user_id ) ) {
+				return $user_id;
+			}
+		}
+
+		$user = get_user_by( 'id', $user_id );
+
+		/**
+		 * Fires immediately after a user is created or updated via the REST API.
+		 *
+		 * @since 4.7.0
+		 *
+		 * @param WP_User         $user     Inserted or updated user object.
+		 * @param WP_REST_Request $request  Request object.
+		 * @param bool            $creating True when creating a user, false when updating.
+		 */
+		do_action( 'rest_insert_user', $user, $request, true );
+
+		if ( ! empty( $request['roles'] ) && ! empty( $schema['properties']['roles'] ) ) {
+			array_map( array( $user, 'add_role' ), $request['roles'] );
+		}
+
+		if ( ! empty( $schema['properties']['meta'] ) && isset( $request['meta'] ) ) {
+			$meta_update = $this->meta->update_value( $request['meta'], $user_id );
+
+			if ( is_wp_error( $meta_update ) ) {
+				return $meta_update;
+			}
+		}
+
+		$user = get_user_by( 'id', $user_id );
+		$fields_update = $this->update_additional_fields_for_object( $user, $request );
+
+		if ( is_wp_error( $fields_update ) ) {
+			return $fields_update;
+		}
+
+		$request->set_param( 'context', 'edit' );
+
+		$response = $this->prepare_item_for_response( $user, $request );
+		$response = rest_ensure_response( $response );
+
+		$response->set_status( 201 );
+		$response->header( 'Location', rest_url( sprintf( '%s/%s/%d', $this->namespace, $this->rest_base, $user_id ) ) );
+
+		return $response;
+	}
+
+	/**
+	 * Checks if a given request has access to update a user.
+	 *
+	 * @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, WP_Error object otherwise.
+	 */
+	public function update_item_permissions_check( $request ) {
+		$user = $this->get_user( $request['id'] );
+		if ( is_wp_error( $user ) ) {
+			return $user;
+		}
+
+		if ( ! empty( $request['roles'] ) ) {
+			if ( ! current_user_can( 'promote_user', $user->ID ) ) {
+				return new WP_Error( 'rest_cannot_edit_roles', __( 'Sorry, you are not allowed to edit roles of this user.' ), array( 'status' => rest_authorization_required_code() ) );
+			}
+
+			$request_params = array_keys( $request->get_params() );
+			sort( $request_params );
+			// If only 'id' and 'roles' are specified (we are only trying to
+			// edit roles), then only the 'promote_user' cap is required.
+			if ( $request_params === array( 'id', 'roles' ) ) {
+				return true;
+			}
+		}
+
+		if ( ! current_user_can( 'edit_user', $user->ID ) ) {
+			return new WP_Error( 'rest_cannot_edit', __( 'Sorry, you are not allowed to edit this user.' ), array( 'status' => rest_authorization_required_code() ) );
+		}
+
+		return true;
+	}
+
+	/**
+	 * Updates a single user.
+	 *
+	 * @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 ) {
+		$user = $this->get_user( $request['id'] );
+		if ( is_wp_error( $user ) ) {
+			return $user;
+		}
+
+		$id = $user->ID;
+
+		if ( ! $user ) {
+			return new WP_Error( 'rest_user_invalid_id', __( 'Invalid user ID.' ), array( 'status' => 404 ) );
+		}
+
+		if ( email_exists( $request['email'] ) && $request['email'] !== $user->user_email ) {
+			return new WP_Error( 'rest_user_invalid_email', __( 'Invalid email address.' ), array( 'status' => 400 ) );
+		}
+
+		if ( ! empty( $request['username'] ) && $request['username'] !== $user->user_login ) {
+			return new WP_Error( 'rest_user_invalid_argument', __( "Username isn't editable." ), array( 'status' => 400 ) );
+		}
+
+		if ( ! empty( $request['slug'] ) && $request['slug'] !== $user->user_nicename && get_user_by( 'slug', $request['slug'] ) ) {
+			return new WP_Error( 'rest_user_invalid_slug', __( 'Invalid slug.' ), array( 'status' => 400 ) );
+		}
+
+		if ( ! empty( $request['roles'] ) ) {
+			$check_permission = $this->check_role_update( $id, $request['roles'] );
+
+			if ( is_wp_error( $check_permission ) ) {
+				return $check_permission;
+			}
+		}
+
+		$user = $this->prepare_item_for_database( $request );
+
+		// Ensure we're operating on the same user we already checked.
+		$user->ID = $id;
+
+		$user_id = wp_update_user( wp_slash( (array) $user ) );
+
+		if ( is_wp_error( $user_id ) ) {
+			return $user_id;
+		}
+
+		$user = get_user_by( 'id', $user_id );
+
+		/** This action is documented in wp-includes/rest-api/endpoints/class-wp-rest-users-controller.php */
+		do_action( 'rest_insert_user', $user, $request, false );
+
+		if ( ! empty( $request['roles'] ) ) {
+			array_map( array( $user, 'add_role' ), $request['roles'] );
+		}
+
+		$schema = $this->get_item_schema();
+
+		if ( ! empty( $schema['properties']['meta'] ) && isset( $request['meta'] ) ) {
+			$meta_update = $this->meta->update_value( $request['meta'], $id );
+
+			if ( is_wp_error( $meta_update ) ) {
+				return $meta_update;
+			}
+		}
+
+		$user = get_user_by( 'id', $user_id );
+		$fields_update = $this->update_additional_fields_for_object( $user, $request );
+
+		if ( is_wp_error( $fields_update ) ) {
+			return $fields_update;
+		}
+
+		$request->set_param( 'context', 'edit' );
+
+		$response = $this->prepare_item_for_response( $user, $request );
+		$response = rest_ensure_response( $response );
+
+		return $response;
+	}
+
+	/**
+	 * Checks if a given request has access to update the current user.
+	 *
+	 * @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, WP_Error object otherwise.
+	 */
+	public function update_current_item_permissions_check( $request ) {
+		$request['id'] = get_current_user_id();
+
+		return $this->update_item_permissions_check( $request );
+	}
+
+	/**
+	 * Updates the current user.
+	 *
+	 * @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.
+	 */
+	function update_current_item( $request ) {
+		$request['id'] = get_current_user_id();
+
+		return $this->update_item( $request );
+	}
+
+	/**
+	 * Checks if a given request has access delete a user.
+	 *
+	 * @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, WP_Error object otherwise.
+	 */
+	public function delete_item_permissions_check( $request ) {
+		$user = $this->get_user( $request['id'] );
+		if ( is_wp_error( $user ) ) {
+			return $user;
+		}
+
+		if ( ! current_user_can( 'delete_user', $user->ID ) ) {
+			return new WP_Error( 'rest_user_cannot_delete', __( 'Sorry, you are not allowed to delete this user.' ), array( 'status' => rest_authorization_required_code() ) );
+		}
+
+		return true;
+	}
+
+	/**
+	 * Deletes a single user.
+	 *
+	 * @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 ) {
+		// We don't support delete requests in multisite.
+		if ( is_multisite() ) {
+			return new WP_Error( 'rest_cannot_delete', __( 'The user cannot be deleted.' ), array( 'status' => 501 ) );
+		}
+		$user = $this->get_user( $request['id'] );
+		if ( is_wp_error( $user ) ) {
+			return $user;
+		}
+
+		$id       = $user->ID;
+		$reassign = false === $request['reassign'] ? null : absint( $request['reassign'] );
+		$force    = isset( $request['force'] ) ? (bool) $request['force'] : false;
+
+		// We don't support trashing for users.
+		if ( ! $force ) {
+			/* translators: %s: force=true */
+			return new WP_Error( 'rest_trash_not_supported', sprintf( __( "Users do not support trashing. Set '%s' to delete." ), 'force=true' ), array( 'status' => 501 ) );
+		}
+
+		if ( ! empty( $reassign ) ) {
+			if ( $reassign === $id || ! get_userdata( $reassign ) ) {
+				return new WP_Error( 'rest_user_invalid_reassign', __( 'Invalid user ID for reassignment.' ), array( 'status' => 400 ) );
+			}
+		}
+
+		$request->set_param( 'context', 'edit' );
+
+		$previous = $this->prepare_item_for_response( $user, $request );
+
+		/** Include admin user functions to get access to wp_delete_user() */
+		require_once ABSPATH . 'wp-admin/includes/user.php';
+
+		$result = wp_delete_user( $id, $reassign );
+
+		if ( ! $result ) {
+			return new WP_Error( 'rest_cannot_delete', __( 'The user cannot be deleted.' ), array( 'status' => 500 ) );
+		}
+
+		$response = new WP_REST_Response();
+		$response->set_data( array( 'deleted' => true, 'previous' => $previous->get_data() ) );
+
+		/**
+		 * Fires immediately after a user is deleted via the REST API.
+		 *
+		 * @since 4.7.0
+		 *
+		 * @param WP_User          $user     The user data.
+		 * @param WP_REST_Response $response The response returned from the API.
+		 * @param WP_REST_Request  $request  The request sent to the API.
+		 */
+		do_action( 'rest_delete_user', $user, $response, $request );
+
+		return $response;
+	}
+
+	/**
+	 * Checks if a given request has access to delete the current user.
+	 *
+	 * @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, WP_Error object otherwise.
+	 */
+	public function delete_current_item_permissions_check( $request ) {
+		$request['id'] = get_current_user_id();
+
+		return $this->delete_item_permissions_check( $request );
+	}
+
+	/**
+	 * Deletes the current user.
+	 *
+	 * @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.
+	 */
+	function delete_current_item( $request ) {
+		$request['id'] = get_current_user_id();
+
+		return $this->delete_item( $request );
+	}
+
+	/**
+	 * Prepares a single user output for response.
+	 *
+	 * @since 4.7.0
+	 *
+	 * @param WP_User         $user    User object.
+	 * @param WP_REST_Request $request Request object.
+	 * @return WP_REST_Response Response object.
+	 */
+	public function prepare_item_for_response( $user, $request ) {
+
+		$data   = array();
+		$fields = $this->get_fields_for_response( $request );
+
+		if ( in_array( 'id', $fields, true ) ) {
+			$data['id'] = $user->ID;
+		}
+
+		if ( in_array( 'username', $fields, true ) ) {
+			$data['username'] = $user->user_login;
+		}
+
+		if ( in_array( 'name', $fields, true ) ) {
+			$data['name'] = $user->display_name;
+		}
+
+		if ( in_array( 'first_name', $fields, true ) ) {
+			$data['first_name'] = $user->first_name;
+		}
+
+		if ( in_array( 'last_name', $fields, true ) ) {
+			$data['last_name'] = $user->last_name;
+		}
+
+		if ( in_array( 'email', $fields, true ) ) {
+			$data['email'] = $user->user_email;
+		}
+
+		if ( in_array( 'url', $fields, true ) ) {
+			$data['url'] = $user->user_url;
+		}
+
+		if ( in_array( 'description', $fields, true ) ) {
+			$data['description'] = $user->description;
+		}
+
+		if ( in_array( 'link', $fields, true ) ) {
+			$data['link'] = get_author_posts_url( $user->ID, $user->user_nicename );
+		}
+
+		if ( in_array( 'locale', $fields, true ) ) {
+			$data['locale'] = get_user_locale( $user );
+		}
+
+		if ( in_array( 'nickname', $fields, true ) ) {
+			$data['nickname'] = $user->nickname;
+		}
+
+		if ( in_array( 'slug', $fields, true ) ) {
+			$data['slug'] = $user->user_nicename;
+		}
+
+		if ( in_array( 'roles', $fields, true ) ) {
+			// Defensively call array_values() to ensure an array is returned.
+			$data['roles'] = array_values( $user->roles );
+		}
+
+		if ( in_array( 'registered_date', $fields, true ) ) {
+			$data['registered_date'] = date( 'c', strtotime( $user->user_registered ) );
+		}
+
+		if ( in_array( 'capabilities', $fields, true ) ) {
+			$data['capabilities'] = (object) $user->allcaps;
+		}
+
+		if ( in_array( 'extra_capabilities', $fields, true ) ) {
+			$data['extra_capabilities'] = (object) $user->caps;
+		}
+
+		if ( in_array( 'avatar_urls', $fields, true ) ) {
+			$data['avatar_urls'] = rest_get_avatar_urls( $user->user_email );
+		}
+
+		if ( in_array( 'meta', $fields, true ) ) {
+			$data['meta'] = $this->meta->get_value( $user->ID, $request );
+		}
+
+		$context = ! empty( $request['context'] ) ? $request['context'] : 'embed';
+
+		$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( $this->prepare_links( $user ) );
+
+		/**
+		 * Filters user data returned from the REST API.
+		 *
+		 * @since 4.7.0
+		 *
+		 * @param WP_REST_Response $response The response object.
+		 * @param object           $user     User object used to create response.
+		 * @param WP_REST_Request  $request  Request object.
+		 */
+		return apply_filters( 'rest_prepare_user', $response, $user, $request );
+	}
+
+	/**
+	 * Prepares links for the user request.
+	 *
+	 * @since 4.7.0
+	 *
+	 * @param WP_Post $user User object.
+	 * @return array Links for the given user.
+	 */
+	protected function prepare_links( $user ) {
+		$links = array(
+			'self' => array(
+				'href' => rest_url( sprintf( '%s/%s/%d', $this->namespace, $this->rest_base, $user->ID ) ),
+			),
+			'collection' => array(
+				'href' => rest_url( sprintf( '%s/%s', $this->namespace, $this->rest_base ) ),
+			),
+		);
+
+		return $links;
+	}
+
+	/**
+	 * Prepares a single user for creation or update.
+	 *
+	 * @since 4.7.0
+	 *
+	 * @param WP_REST_Request $request Request object.
+	 * @return object $prepared_user User object.
+	 */
+	protected function prepare_item_for_database( $request ) {
+		$prepared_user = new stdClass;
+
+		$schema = $this->get_item_schema();
+
+		// required arguments.
+		if ( isset( $request['email'] ) && ! empty( $schema['properties']['email'] ) ) {
+			$prepared_user->user_email = $request['email'];
+		}
+
+		if ( isset( $request['username'] ) && ! empty( $schema['properties']['username'] ) ) {
+			$prepared_user->user_login = $request['username'];
+		}
+
+		if ( isset( $request['password'] ) && ! empty( $schema['properties']['password'] ) ) {
+			$prepared_user->user_pass = $request['password'];
+		}
+
+		// optional arguments.
+		if ( isset( $request['id'] ) ) {
+			$prepared_user->ID = absint( $request['id'] );
+		}
+
+		if ( isset( $request['name'] ) && ! empty( $schema['properties']['name'] ) ) {
+			$prepared_user->display_name = $request['name'];
+		}
+
+		if ( isset( $request['first_name'] ) && ! empty( $schema['properties']['first_name'] ) ) {
+			$prepared_user->first_name = $request['first_name'];
+		}
+
+		if ( isset( $request['last_name'] ) && ! empty( $schema['properties']['last_name'] ) ) {
+			$prepared_user->last_name = $request['last_name'];
+		}
+
+		if ( isset( $request['nickname'] ) && ! empty( $schema['properties']['nickname'] ) ) {
+			$prepared_user->nickname = $request['nickname'];
+		}
+
+		if ( isset( $request['slug'] ) && ! empty( $schema['properties']['slug'] ) ) {
+			$prepared_user->user_nicename = $request['slug'];
+		}
+
+		if ( isset( $request['description'] ) && ! empty( $schema['properties']['description'] ) ) {
+			$prepared_user->description = $request['description'];
+		}
+
+		if ( isset( $request['url'] ) && ! empty( $schema['properties']['url'] ) ) {
+			$prepared_user->user_url = $request['url'];
+		}
+
+		if ( isset( $request['locale'] ) && ! empty( $schema['properties']['locale'] ) ) {
+			$prepared_user->locale = $request['locale'];
+		}
+
+		// setting roles will be handled outside of this function.
+		if ( isset( $request['roles'] ) ) {
+			$prepared_user->role = false;
+		}
+
+		/**
+		 * Filters user data before insertion via the REST API.
+		 *
+		 * @since 4.7.0
+		 *
+		 * @param object          $prepared_user User object.
+		 * @param WP_REST_Request $request       Request object.
+		 */
+		return apply_filters( 'rest_pre_insert_user', $prepared_user, $request );
+	}
+
+	/**
+	 * Determines if the current user is allowed to make the desired roles change.
+	 *
+	 * @since 4.7.0
+	 *
+	 * @param integer $user_id User ID.
+	 * @param array   $roles   New user roles.
+	 * @return true|WP_Error True if the current user is allowed to make the role change,
+	 *                       otherwise a WP_Error object.
+	 */
+	protected function check_role_update( $user_id, $roles ) {
+		global $wp_roles;
+
+		foreach ( $roles as $role ) {
+
+			if ( ! isset( $wp_roles->role_objects[ $role ] ) ) {
+				/* translators: %s: role key */
+				return new WP_Error( 'rest_user_invalid_role', sprintf( __( 'The role %s does not exist.' ), $role ), array( 'status' => 400 ) );
+			}
+
+			$potential_role = $wp_roles->role_objects[ $role ];
+
+			/*
+			 * Don't let anyone with 'edit_users' (admins) edit their own role to something without it.
+			 * Multisite super admins can freely edit their blog roles -- they possess all caps.
+			 */
+			if ( ! ( is_multisite()
+				&& current_user_can( 'manage_sites' ) )
+				&& get_current_user_id() === $user_id
+				&& ! $potential_role->has_cap( 'edit_users' )
+			) {
+				return new WP_Error( 'rest_user_invalid_role', __( 'Sorry, you are not allowed to give users that role.' ), array( 'status' => rest_authorization_required_code() ) );
+			}
+
+			/** Include admin functions to get access to get_editable_roles() */
+			require_once ABSPATH . 'wp-admin/includes/admin.php';
+
+			// The new role must be editable by the logged-in user.
+			$editable_roles = get_editable_roles();
+
+			if ( empty( $editable_roles[ $role ] ) ) {
+				return new WP_Error( 'rest_user_invalid_role', __( 'Sorry, you are not allowed to give users that role.' ), array( 'status' => 403 ) );
+			}
+		}
+
+		return true;
+	}
+
+	/**
+	 * Check a username for the REST API.
+	 *
+	 * Performs a couple of checks like edit_user() in wp-admin/includes/user.php.
+	 *
+	 * @since 4.7.0
+	 *
+	 * @param  mixed            $value   The username submitted in the request.
+	 * @param  WP_REST_Request  $request Full details about the request.
+	 * @param  string           $param   The parameter name.
+	 * @return WP_Error|string The sanitized username, if valid, otherwise an error.
+	 */
+	public function check_username( $value, $request, $param ) {
+		$username = (string) $value;
+
+		if ( ! validate_username( $username ) ) {
+			return new WP_Error( 'rest_user_invalid_username', __( 'Username contains invalid characters.' ), array( 'status' => 400 ) );
+		}
+
+		/** This filter is documented in wp-includes/user.php */
+		$illegal_logins = (array) apply_filters( 'illegal_user_logins', array() );
+
+		if ( in_array( strtolower( $username ), array_map( 'strtolower', $illegal_logins ) ) ) {
+			return new WP_Error( 'rest_user_invalid_username', __( 'Sorry, that username is not allowed.' ), array( 'status' => 400 ) );
+		}
+
+		return $username;
+	}
+
+	/**
+	 * Check a user password for the REST API.
+	 *
+	 * Performs a couple of checks like edit_user() in wp-admin/includes/user.php.
+	 *
+	 * @since 4.7.0
+	 *
+	 * @param  mixed            $value   The password submitted in the request.
+	 * @param  WP_REST_Request  $request Full details about the request.
+	 * @param  string           $param   The parameter name.
+	 * @return WP_Error|string The sanitized password, if valid, otherwise an error.
+	 */
+	public function check_user_password( $value, $request, $param ) {
+		$password = (string) $value;
+
+		if ( empty( $password ) ) {
+			return new WP_Error( 'rest_user_invalid_password', __( 'Passwords cannot be empty.' ), array( 'status' => 400 ) );
+		}
+
+		if ( false !== strpos( $password, "\\" ) ) {
+			return new WP_Error( 'rest_user_invalid_password', __( 'Passwords cannot contain the "\\" character.' ), array( 'status' => 400 ) );
+		}
+
+		return $password;
+	}
+
+	/**
+	 * Retrieves the user's schema, conforming to JSON Schema.
+	 *
+	 * @since 4.7.0
+	 *
+	 * @return array Item schema data.
+	 */
+	public function get_item_schema() {
+		$schema = array(
+			'$schema'    => 'http://json-schema.org/draft-04/schema#',
+			'title'      => 'user',
+			'type'       => 'object',
+			'properties' => array(
+				'id'          => array(
+					'description' => __( 'Unique identifier for the user.' ),
+					'type'        => 'integer',
+					'context'     => array( 'embed', 'view', 'edit' ),
+					'readonly'    => true,
+				),
+				'username'    => array(
+					'description' => __( 'Login name for the user.' ),
+					'type'        => 'string',
+					'context'     => array( 'edit' ),
+					'required'    => true,
+					'arg_options' => array(
+						'sanitize_callback' => array( $this, 'check_username' ),
+					),
+				),
+				'name'        => array(
+					'description' => __( 'Display name for the user.' ),
+					'type'        => 'string',
+					'context'     => array( 'embed', 'view', 'edit' ),
+					'arg_options' => array(
+						'sanitize_callback' => 'sanitize_text_field',
+					),
+				),
+				'first_name'  => array(
+					'description' => __( 'First name for the user.' ),
+					'type'        => 'string',
+					'context'     => array( 'edit' ),
+					'arg_options' => array(
+						'sanitize_callback' => 'sanitize_text_field',
+					),
+				),
+				'last_name'   => array(
+					'description' => __( 'Last name for the user.' ),
+					'type'        => 'string',
+					'context'     => array( 'edit' ),
+					'arg_options' => array(
+						'sanitize_callback' => 'sanitize_text_field',
+					),
+				),
+				'email'       => array(
+					'description' => __( 'The email address for the user.' ),
+					'type'        => 'string',
+					'format'      => 'email',
+					'context'     => array( 'edit' ),
+					'required'    => true,
+				),
+				'url'         => array(
+					'description' => __( 'URL of the user.' ),
+					'type'        => 'string',
+					'format'      => 'uri',
+					'context'     => array( 'embed', 'view', 'edit' ),
+				),
+				'description' => array(
+					'description' => __( 'Description of the user.' ),
+					'type'        => 'string',
+					'context'     => array( 'embed', 'view', 'edit' ),
+				),
+				'link'        => array(
+					'description' => __( 'Author URL of the user.' ),
+					'type'        => 'string',
+					'format'      => 'uri',
+					'context'     => array( 'embed', 'view', 'edit' ),
+					'readonly'    => true,
+				),
+				'locale'    => array(
+					'description' => __( 'Locale for the user.' ),
+					'type'        => 'string',
+					'enum'        => array_merge( array( '', 'en_US' ), get_available_languages() ),
+					'context'     => array( 'edit' ),
+				),
+				'nickname'    => array(
+					'description' => __( 'The nickname for the user.' ),
+					'type'        => 'string',
+					'context'     => array( 'edit' ),
+					'arg_options' => array(
+						'sanitize_callback' => 'sanitize_text_field',
+					),
+				),
+				'slug'        => array(
+					'description' => __( 'An alphanumeric identifier for the user.' ),
+					'type'        => 'string',
+					'context'     => array( 'embed', 'view', 'edit' ),
+					'arg_options' => array(
+						'sanitize_callback' => array( $this, 'sanitize_slug' ),
+					),
+				),
+				'registered_date' => array(
+					'description' => __( 'Registration date for the user.' ),
+					'type'        => 'string',
+					'format'      => 'date-time',
+					'context'     => array( 'edit' ),
+					'readonly'    => true,
+				),
+				'roles'           => array(
+					'description' => __( 'Roles assigned to the user.' ),
+					'type'        => 'array',
+					'items'       => array(
+						'type'    => 'string',
+					),
+					'context'     => array( 'edit' ),
+				),
+				'password'        => array(
+					'description' => __( 'Password for the user (never included).' ),
+					'type'        => 'string',
+					'context'     => array(), // Password is never displayed.
+					'required'    => true,
+					'arg_options' => array(
+						'sanitize_callback' => array( $this, 'check_user_password' ),
+					),
+				),
+				'capabilities'    => array(
+					'description' => __( 'All capabilities assigned to the user.' ),
+					'type'        => 'object',
+					'context'     => array( 'edit' ),
+					'readonly'    => true,
+				),
+				'extra_capabilities' => array(
+					'description' => __( 'Any extra capabilities assigned to the user.' ),
+					'type'        => 'object',
+					'context'     => array( 'edit' ),
+					'readonly'    => true,
+				),
+			),
+		);
+
+		if ( get_option( 'show_avatars' ) ) {
+			$avatar_properties = array();
+
+			$avatar_sizes = rest_get_avatar_sizes();
+
+			foreach ( $avatar_sizes as $size ) {
+				$avatar_properties[ $size ] = array(
+					/* translators: %d: avatar image size in pixels */
+					'description' => sprintf( __( 'Avatar URL with image size of %d pixels.' ), $size ),
+					'type'        => 'string',
+					'format'      => 'uri',
+					'context'     => array( 'embed', 'view', 'edit' ),
+				);
+			}
+
+			$schema['properties']['avatar_urls']  = array(
+				'description' => __( 'Avatar URLs for the user.' ),
+				'type'        => 'object',
+				'context'     => array( 'embed', 'view', 'edit' ),
+				'readonly'    => true,
+				'properties'  => $avatar_properties,
+			);
+		}
+
+		$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
+	 *
+	 * @return array Collection parameters.
+	 */
+	public function get_collection_params() {
+		$query_params = parent::get_collection_params();
+
+		$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(),
+		);
+
+		$query_params['offset'] = array(
+			'description'        => __( 'Offset the result set by a specific number of items.' ),
+			'type'               => 'integer',
+		);
+
+		$query_params['order'] = array(
+			'default'            => 'asc',
+			'description'        => __( 'Order sort attribute ascending or descending.' ),
+			'enum'               => array( 'asc', 'desc' ),
+			'type'               => 'string',
+		);
+
+		$query_params['orderby'] = array(
+			'default'            => 'name',
+			'description'        => __( 'Sort collection by object attribute.' ),
+			'enum'               => array(
+				'id',
+				'include',
+				'name',
+				'registered_date',
+				'slug',
+				'include_slugs',
+				'email',
+				'url',
+			),
+			'type'               => 'string',
+		);
+
+		$query_params['slug']    = array(
+			'description'        => __( 'Limit result set to users with one or more specific slugs.' ),
+			'type'               => 'array',
+			'items'              => array(
+				'type'               => 'string',
+			),
+		);
+
+		$query_params['roles']   = array(
+			'description'        => __( 'Limit result set to users matching at least one specific role provided. Accepts csv list or single role.' ),
+			'type'               => 'array',
+			'items'              => array(
+				'type'           => 'string',
+			),
+		);
+
+		$query_params['who'] = array(
+			'description' => __( 'Limit result set to users who are considered authors.' ),
+			'type'        => 'string',
+			'enum'        => array(
+				'authors',
+			),
+		);
+
+		/**
+		 * Filter collection parameters for the users controller.
+		 *
+		 * This filter registers the collection parameter, but does not map the
+		 * collection parameter to an internal WP_User_Query parameter.  Use the
+		 * `rest_user_query` filter to set WP_User_Query arguments.
+		 *
+		 * @since 4.7.0
+		 *
+		 * @param array $query_params JSON Schema-formatted collection parameters.
+		 */
+		return apply_filters( 'rest_user_collection_params', $query_params );
+	}
+}