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<?php

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/**

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* REST API: WP_REST_Widgets_Controller class

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* @package WordPress

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* @subpackage REST_API

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* @since 5.8.0

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/**

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* Core class to access widgets via the REST API.

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* @since 5.8.0

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* @see WP_REST_Controller

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class WP_REST_Widgets_Controller extends WP_REST_Controller {

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/**

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* Tracks whether {@see retrieve_widgets()} has been called in the current request.

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* @since 5.9.0

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* @var bool

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protected $widgets_retrieved = false;

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/**

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* Whether the controller supports batching.

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* @since 5.9.0

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* @var array

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protected $allow_batch = array( 'v1' => true );

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/**

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* Widgets controller constructor.

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* @since 5.8.0

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public function __construct() {

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$this->namespace = 'wp/v2';

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$this->rest_base = 'widgets';

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}

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/**

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* Registers the widget routes for the controller.

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* @since 5.8.0

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public function register_routes() {

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register_rest_route(

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$this->namespace,

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$this->rest_base,

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array(

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array(

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'methods' => WP_REST_Server::READABLE,

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'callback' => array( $this, 'get_items' ),

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'permission_callback' => array( $this, 'get_items_permissions_check' ),

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'args' => $this->get_collection_params(),

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array(

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'methods' => WP_REST_Server::CREATABLE,

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'callback' => array( $this, 'create_item' ),

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'permission_callback' => array( $this, 'create_item_permissions_check' ),

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'args' => $this->get_endpoint_args_for_item_schema(),

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'allow_batch' => $this->allow_batch,

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'schema' => array( $this, 'get_public_item_schema' ),

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)

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);

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register_rest_route(

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$this->namespace,

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$this->rest_base . '/(?P<id>[\w\-]+)',

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array(

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array(

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'methods' => WP_REST_Server::READABLE,

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'callback' => array( $this, 'get_item' ),

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'permission_callback' => array( $this, 'get_item_permissions_check' ),

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'args' => array(

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'context' => $this->get_context_param( array( 'default' => 'view' ) ),

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array(

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'methods' => WP_REST_Server::EDITABLE,

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'callback' => array( $this, 'update_item' ),

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'permission_callback' => array( $this, 'update_item_permissions_check' ),

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'args' => $this->get_endpoint_args_for_item_schema( WP_REST_Server::EDITABLE ),

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array(

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'methods' => WP_REST_Server::DELETABLE,

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'callback' => array( $this, 'delete_item' ),

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'permission_callback' => array( $this, 'delete_item_permissions_check' ),

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'args' => array(

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'force' => array(

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'description' => __( 'Whether to force removal of the widget, or move it to the inactive sidebar.' ),

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'type' => 'boolean',

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'allow_batch' => $this->allow_batch,

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'schema' => array( $this, 'get_public_item_schema' ),

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)

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);

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}

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/**

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* Checks if a given request has access to get widgets.

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* @since 5.8.0

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* @param WP_REST_Request $request Full details about the request.

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* @return true|WP_Error True if the request has read access, WP_Error object otherwise.

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public function get_items_permissions_check( $request ) {

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$this->retrieve_widgets();

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if ( isset( $request['sidebar'] ) && $this->check_read_sidebar_permission( $request['sidebar'] ) ) {

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return true;

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}

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foreach ( wp_get_sidebars_widgets() as $sidebar_id => $widget_ids ) {

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if ( $this->check_read_sidebar_permission( $sidebar_id ) ) {

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return true;

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}

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}

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return $this->permissions_check( $request );

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}

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/**

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* Retrieves a collection of widgets.

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* @since 5.8.0

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* @param WP_REST_Request $request Full details about the request.

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* @return WP_REST_Response|WP_Error Response object on success, or WP_Error object on failure.

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public function get_items( $request ) {

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$this->retrieve_widgets();

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$prepared = array();

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$permissions_check = $this->permissions_check( $request );

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foreach ( wp_get_sidebars_widgets() as $sidebar_id => $widget_ids ) {

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if ( isset( $request['sidebar'] ) && $sidebar_id !== $request['sidebar'] ) {

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continue;

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}

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if ( is_wp_error( $permissions_check ) && ! $this->check_read_sidebar_permission( $sidebar_id ) ) {

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continue;

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}

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foreach ( $widget_ids as $widget_id ) {

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$response = $this->prepare_item_for_response( compact( 'sidebar_id', 'widget_id' ), $request );

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if ( ! is_wp_error( $response ) ) {

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$prepared[] = $this->prepare_response_for_collection( $response );

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}

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}

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}

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return new WP_REST_Response( $prepared );

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}

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/**

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* Checks if a given request has access to get a widget.

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* @since 5.8.0

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* @param WP_REST_Request $request Full details about the request.

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* @return true|WP_Error True if the request has read access, WP_Error object otherwise.

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public function get_item_permissions_check( $request ) {

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$this->retrieve_widgets();

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$widget_id = $request['id'];

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$sidebar_id = wp_find_widgets_sidebar( $widget_id );

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if ( $sidebar_id && $this->check_read_sidebar_permission( $sidebar_id ) ) {

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return true;

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}

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return $this->permissions_check( $request );

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}

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/**

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* Checks if a sidebar can be read publicly.

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* @since 5.9.0

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* @param string $sidebar_id The sidebar ID.

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* @return bool Whether the sidebar can be read.

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protected function check_read_sidebar_permission( $sidebar_id ) {

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$sidebar = wp_get_sidebar( $sidebar_id );

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return ! empty( $sidebar['show_in_rest'] );

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}

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/**

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* Gets an individual widget.

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* @since 5.8.0

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* @param WP_REST_Request $request Full details about the request.

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* @return WP_REST_Response|WP_Error Response object on success, or WP_Error object on failure.

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public function get_item( $request ) {

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$this->retrieve_widgets();

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$widget_id = $request['id'];

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$sidebar_id = wp_find_widgets_sidebar( $widget_id );

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if ( is_null( $sidebar_id ) ) {

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return new WP_Error(

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'rest_widget_not_found',

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__( 'No widget was found with that id.' ),

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array( 'status' => 404 )

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);

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}

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return $this->prepare_item_for_response( compact( 'widget_id', 'sidebar_id' ), $request );

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}

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/**

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* Checks if a given request has access to create widgets.

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* @since 5.8.0

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* @param WP_REST_Request $request Full details about the request.

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* @return true|WP_Error True if the request has read access, WP_Error object otherwise.

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public function create_item_permissions_check( $request ) {

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return $this->permissions_check( $request );

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}

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/**

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* Creates a widget.

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* @since 5.8.0

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* @param WP_REST_Request $request Full details about the request.

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* @return WP_REST_Response|WP_Error Response object on success, or WP_Error object on failure.

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public function create_item( $request ) {

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$sidebar_id = $request['sidebar'];

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$widget_id = $this->save_widget( $request, $sidebar_id );

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if ( is_wp_error( $widget_id ) ) {

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return $widget_id;

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}

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wp_assign_widget_to_sidebar( $widget_id, $sidebar_id );

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$request['context'] = 'edit';

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$response = $this->prepare_item_for_response( compact( 'sidebar_id', 'widget_id' ), $request );

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if ( is_wp_error( $response ) ) {

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return $response;

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}

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$response->set_status( 201 );

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return $response;

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}

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/**

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* Checks if a given request has access to update widgets.

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* @since 5.8.0

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* @param WP_REST_Request $request Full details about the request.

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* @return true|WP_Error True if the request has read access, WP_Error object otherwise.

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public function update_item_permissions_check( $request ) {

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return $this->permissions_check( $request );

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}

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/**

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* Updates an existing widget.

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* @since 5.8.0

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* @global WP_Widget_Factory $wp_widget_factory

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* @param WP_REST_Request $request Full details about the request.

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* @return WP_REST_Response|WP_Error Response object on success, or WP_Error object on failure.

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public function update_item( $request ) {

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global $wp_widget_factory;

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* retrieve_widgets() contains logic to move "hidden" or "lost" widgets to the

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* wp_inactive_widgets sidebar based on the contents of the $sidebars_widgets global.

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* When batch requests are processed, this global is not properly updated by previous

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* calls, resulting in widgets incorrectly being moved to the wp_inactive_widgets

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* sidebar.

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* See https://core.trac.wordpress.org/ticket/53657.

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wp_get_sidebars_widgets();

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$this->retrieve_widgets();

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$widget_id = $request['id'];

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$sidebar_id = wp_find_widgets_sidebar( $widget_id );

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// Allow sidebar to be unset or missing when widget is not a WP_Widget.

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$parsed_id = wp_parse_widget_id( $widget_id );

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$widget_object = $wp_widget_factory->get_widget_object( $parsed_id['id_base'] );

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if ( is_null( $sidebar_id ) && $widget_object ) {

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return new WP_Error(

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'rest_widget_not_found',

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__( 'No widget was found with that id.' ),

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array( 'status' => 404 )

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);

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}

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if (

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$request->has_param( 'instance' ) ||

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$request->has_param( 'form_data' )

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) {

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$maybe_error = $this->save_widget( $request, $sidebar_id );

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if ( is_wp_error( $maybe_error ) ) {

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return $maybe_error;

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}

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}

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if ( $request->has_param( 'sidebar' ) ) {

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if ( $sidebar_id !== $request['sidebar'] ) {

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$sidebar_id = $request['sidebar'];

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wp_assign_widget_to_sidebar( $widget_id, $sidebar_id );

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}

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}

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$request['context'] = 'edit';

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return $this->prepare_item_for_response( compact( 'widget_id', 'sidebar_id' ), $request );

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}

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/**

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* Checks if a given request has access to delete widgets.

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* @since 5.8.0

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* @param WP_REST_Request $request Full details about the request.

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* @return true|WP_Error True if the request has read access, WP_Error object otherwise.

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public function delete_item_permissions_check( $request ) {

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return $this->permissions_check( $request );

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}

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/**

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* Deletes a widget.

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* @since 5.8.0

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* @global WP_Widget_Factory $wp_widget_factory

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* @global array $wp_registered_widget_updates The registered widget update functions.

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* @param WP_REST_Request $request Full details about the request.

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* @return WP_REST_Response|WP_Error Response object on success, or WP_Error object on failure.

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public function delete_item( $request ) {

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global $wp_widget_factory, $wp_registered_widget_updates;

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* retrieve_widgets() contains logic to move "hidden" or "lost" widgets to the

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* wp_inactive_widgets sidebar based on the contents of the $sidebars_widgets global.

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* When batch requests are processed, this global is not properly updated by previous

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* calls, resulting in widgets incorrectly being moved to the wp_inactive_widgets

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* sidebar.

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* See https://core.trac.wordpress.org/ticket/53657.

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wp_get_sidebars_widgets();

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$this->retrieve_widgets();

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$widget_id = $request['id'];

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$sidebar_id = wp_find_widgets_sidebar( $widget_id );

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if ( is_null( $sidebar_id ) ) {

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return new WP_Error(

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'rest_widget_not_found',

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__( 'No widget was found with that id.' ),

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array( 'status' => 404 )

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);

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}

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$request['context'] = 'edit';

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if ( $request['force'] ) {

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$response = $this->prepare_item_for_response( compact( 'widget_id', 'sidebar_id' ), $request );

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$parsed_id = wp_parse_widget_id( $widget_id );

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$id_base = $parsed_id['id_base'];

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$original_post = $_POST;

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$original_request = $_REQUEST;

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$_POST = array(

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'sidebar' => $sidebar_id,

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"widget-$id_base" => array(),

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'the-widget-id' => $widget_id,

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'delete_widget' => '1',

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);

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$_REQUEST = $_POST;

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/** This action is documented in wp-admin/widgets-form.php */

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do_action( 'delete_widget', $widget_id, $sidebar_id, $id_base );

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$callback = $wp_registered_widget_updates[ $id_base ]['callback'];

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$params = $wp_registered_widget_updates[ $id_base ]['params'];

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if ( is_callable( $callback ) ) {

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ob_start();

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call_user_func_array( $callback, $params );

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ob_end_clean();

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}

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$_POST = $original_post;

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$_REQUEST = $original_request;

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$widget_object = $wp_widget_factory->get_widget_object( $id_base );

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if ( $widget_object ) {

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* WP_Widget sets `updated = true` after an update to prevent more than one widget

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* from being saved per request. This isn't what we want in the REST API, though,

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* as we support batch requests.

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$widget_object->updated = false;

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}

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wp_assign_widget_to_sidebar( $widget_id, '' );

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$response->set_data(

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array(

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'deleted' => true,

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'previous' => $response->get_data(),

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)

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);

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} else {

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wp_assign_widget_to_sidebar( $widget_id, 'wp_inactive_widgets' );

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$response = $this->prepare_item_for_response(

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array(

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'sidebar_id' => 'wp_inactive_widgets',

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'widget_id' => $widget_id,

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$request

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);

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}

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/**

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* Fires after a widget is deleted via the REST API.

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* @since 5.8.0

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* @param string $widget_id ID of the widget marked for deletion.

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* @param string $sidebar_id ID of the sidebar the widget was deleted from.

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* @param WP_REST_Response|WP_Error $response The response data, or WP_Error object on failure.

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* @param WP_REST_Request $request The request sent to the API.

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do_action( 'rest_delete_widget', $widget_id, $sidebar_id, $response, $request );

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return $response;

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}

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/**

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* Performs a permissions check for managing widgets.

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* @since 5.8.0

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* @param WP_REST_Request $request Full details about the request.

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* @return true|WP_Error

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protected function permissions_check( $request ) {

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if ( ! current_user_can( 'edit_theme_options' ) ) {

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return new WP_Error(

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'rest_cannot_manage_widgets',

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__( 'Sorry, you are not allowed to manage widgets on this site.' ),

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array(

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'status' => rest_authorization_required_code(),

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)

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);

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}

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return true;

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}

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/**

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* Looks for "lost" widgets once per request.

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* @since 5.9.0

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* @see retrieve_widgets()

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