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<?php

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/**

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* REST API: WP_REST_Posts_Controller class

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* @package WordPress

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* @subpackage REST_API

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* @since 4.7.0

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/**

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* Core class to access posts via the REST API.

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* @since 4.7.0

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* @see WP_REST_Controller

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class WP_REST_Posts_Controller extends WP_REST_Controller {

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/**

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* Post type.

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* @since 4.7.0

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* @var string

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protected $post_type;

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/**

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* Instance of a post meta fields object.

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* @since 4.7.0

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* @var WP_REST_Post_Meta_Fields

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protected $meta;

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/**

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* Passwordless post access permitted.

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* @since 5.7.1

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* @var int[]

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protected $password_check_passed = array();

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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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* Constructor.

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* @since 4.7.0

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* @param string $post_type Post type.

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public function __construct( $post_type ) {

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$this->post_type = $post_type;

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$obj = get_post_type_object( $post_type );

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$this->rest_base = ! empty( $obj->rest_base ) ? $obj->rest_base : $obj->name;

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$this->namespace = ! empty( $obj->rest_namespace ) ? $obj->rest_namespace : 'wp/v2';

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$this->meta = new WP_REST_Post_Meta_Fields( $this->post_type );

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}

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/**

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* Registers the routes for posts.

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* @since 4.7.0

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* @see register_rest_route()

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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( WP_REST_Server::CREATABLE ),

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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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$schema = $this->get_item_schema();

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$get_item_args = array(

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

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);

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if ( isset( $schema['properties']['excerpt'] ) ) {

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$get_item_args['excerpt_length'] = array(

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'description' => __( 'Override the default excerpt length.' ),

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'type' => 'integer',

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);

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}

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if ( isset( $schema['properties']['password'] ) ) {

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$get_item_args['password'] = array(

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'description' => __( 'The password for the post if it is password protected.' ),

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'type' => 'string',

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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>[\d]+)',

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array(

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'args' => array(

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'id' => array(

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'description' => __( 'Unique identifier for the post.' ),

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'type' => 'integer',

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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' => $get_item_args,

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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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'type' => 'boolean',

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'default' => false,

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'description' => __( 'Whether to bypass Trash and force deletion.' ),

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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 read posts.

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* @since 4.7.0

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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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$post_type = get_post_type_object( $this->post_type );

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if ( 'edit' === $request['context'] && ! current_user_can( $post_type->cap->edit_posts ) ) {

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return new WP_Error(

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'rest_forbidden_context',

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__( 'Sorry, you are not allowed to edit posts in this post type.' ),

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array( 'status' => rest_authorization_required_code() )

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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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* Overrides the result of the post password check for REST requested posts.

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* Allow users to read the content of password protected posts if they have

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* previously passed a permission check or if they have the `edit_post` capability

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* for the post being checked.

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* @since 5.7.1

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* @param bool $required Whether the post requires a password check.

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* @param WP_Post $post The post been password checked.

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* @return bool Result of password check taking in to account REST API considerations.

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public function check_password_required( $required, $post ) {

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if ( ! $required ) {

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return $required;

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}

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$post = get_post( $post );

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if ( ! $post ) {

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return $required;

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}

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if ( ! empty( $this->password_check_passed[ $post->ID ] ) ) {

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// Password previously checked and approved.

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return false;

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}

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return ! current_user_can( 'edit_post', $post->ID );

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}

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/**

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* Retrieves a collection of posts.

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* @since 4.7.0

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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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// Ensure a search string is set in case the orderby is set to 'relevance'.

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if ( ! empty( $request['orderby'] ) && 'relevance' === $request['orderby'] && empty( $request['search'] ) ) {

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return new WP_Error(

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'rest_no_search_term_defined',

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__( 'You need to define a search term to order by relevance.' ),

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array( 'status' => 400 )

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);

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}

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// Ensure an include parameter is set in case the orderby is set to 'include'.

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if ( ! empty( $request['orderby'] ) && 'include' === $request['orderby'] && empty( $request['include'] ) ) {

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return new WP_Error(

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'rest_orderby_include_missing_include',

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__( 'You need to define an include parameter to order by include.' ),

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array( 'status' => 400 )

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);

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}

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// Retrieve the list of registered collection query parameters.

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$registered = $this->get_collection_params();

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$args = array();

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* This array defines mappings between public API query parameters whose

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* values are accepted as-passed, and their internal WP_Query parameter

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* name equivalents (some are the same). Only values which are also

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* present in $registered will be set.

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$parameter_mappings = array(

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'author' => 'author__in',

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'author_exclude' => 'author__not_in',

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'exclude' => 'post__not_in',

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'include' => 'post__in',

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'menu_order' => 'menu_order',

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'offset' => 'offset',

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'order' => 'order',

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'orderby' => 'orderby',

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'page' => 'paged',

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'parent' => 'post_parent__in',

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'parent_exclude' => 'post_parent__not_in',

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'search' => 's',

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'search_columns' => 'search_columns',

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'slug' => 'post_name__in',

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'status' => 'post_status',

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);

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* For each known parameter which is both registered and present in the request,

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* set the parameter's value on the query $args.

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foreach ( $parameter_mappings as $api_param => $wp_param ) {

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if ( isset( $registered[ $api_param ], $request[ $api_param ] ) ) {

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$args[ $wp_param ] = $request[ $api_param ];

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}

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}

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// Check for & assign any parameters which require special handling or setting.

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$args['date_query'] = array();

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if ( isset( $registered['before'], $request['before'] ) ) {

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$args['date_query'][] = array(

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'before' => $request['before'],

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'column' => 'post_date',

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);

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}

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if ( isset( $registered['modified_before'], $request['modified_before'] ) ) {

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$args['date_query'][] = array(

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'before' => $request['modified_before'],

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'column' => 'post_modified',

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);

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}

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if ( isset( $registered['after'], $request['after'] ) ) {

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$args['date_query'][] = array(

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'after' => $request['after'],

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'column' => 'post_date',

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);

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}

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if ( isset( $registered['modified_after'], $request['modified_after'] ) ) {

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$args['date_query'][] = array(

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'after' => $request['modified_after'],

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'column' => 'post_modified',

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);

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}

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// Ensure our per_page parameter overrides any provided posts_per_page filter.

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if ( isset( $registered['per_page'] ) ) {

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$args['posts_per_page'] = $request['per_page'];

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}

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if ( isset( $registered['sticky'], $request['sticky'] ) ) {

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$sticky_posts = get_option( 'sticky_posts', array() );

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if ( ! is_array( $sticky_posts ) ) {

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$sticky_posts = array();

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}

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if ( $request['sticky'] ) {

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* As post__in will be used to only get sticky posts,

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* we have to support the case where post__in was already

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* specified.

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$args['post__in'] = $args['post__in'] ? array_intersect( $sticky_posts, $args['post__in'] ) : $sticky_posts;

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* If we intersected, but there are no post IDs in common,

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* WP_Query won't return "no posts" for post__in = array()

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* so we have to fake it a bit.

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if ( ! $args['post__in'] ) {

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$args['post__in'] = array( 0 );

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}

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} elseif ( $sticky_posts ) {

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* As post___not_in will be used to only get posts that

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* are not sticky, we have to support the case where post__not_in

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* was already specified.

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$args['post__not_in'] = array_merge( $args['post__not_in'], $sticky_posts );

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}

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}

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$args = $this->prepare_tax_query( $args, $request );

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// Force the post_type argument, since it's not a user input variable.

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$args['post_type'] = $this->post_type;

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/**

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* Filters WP_Query arguments when querying posts via the REST API.

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* The dynamic portion of the hook name, `$this->post_type`, refers to the post type slug.

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* Possible hook names include:

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* - `rest_post_query`

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* - `rest_page_query`

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* - `rest_attachment_query`

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* Enables adding extra arguments or setting defaults for a post collection request.

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* @since 4.7.0

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* @since 5.7.0 Moved after the `tax_query` query arg is generated.

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* @link https://developer.wordpress.org/reference/classes/wp_query/

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* @param array $args Array of arguments for WP_Query.

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* @param WP_REST_Request $request The REST API request.

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$args = apply_filters( "rest_{$this->post_type}_query", $args, $request );

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$query_args = $this->prepare_items_query( $args, $request );

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$posts_query = new WP_Query();

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$query_result = $posts_query->query( $query_args );

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// Allow access to all password protected posts if the context is edit.

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if ( 'edit' === $request['context'] ) {

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add_filter( 'post_password_required', array( $this, 'check_password_required' ), 10, 2 );

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}

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$posts = array();

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update_post_author_caches( $query_result );

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update_post_parent_caches( $query_result );

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if ( post_type_supports( $this->post_type, 'thumbnail' ) ) {

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update_post_thumbnail_cache( $posts_query );

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}

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foreach ( $query_result as $post ) {

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if ( 'edit' === $request['context'] ) {

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$permission = $this->check_update_permission( $post );

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} else {

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$permission = $this->check_read_permission( $post );

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}

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if ( ! $permission ) {

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continue;

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}

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$data = $this->prepare_item_for_response( $post, $request );

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$posts[] = $this->prepare_response_for_collection( $data );

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}

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// Reset filter.

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if ( 'edit' === $request['context'] ) {

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remove_filter( 'post_password_required', array( $this, 'check_password_required' ) );

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}

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$page = (int) $query_args['paged'];

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$total_posts = $posts_query->found_posts;

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if ( $total_posts < 1 && $page > 1 ) {

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// Out-of-bounds, run the query again without LIMIT for total count.

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unset( $query_args['paged'] );

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$count_query = new WP_Query();

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$count_query->query( $query_args );

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$total_posts = $count_query->found_posts;

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}

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$max_pages = (int) ceil( $total_posts / (int) $posts_query->query_vars['posts_per_page'] );

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if ( $page > $max_pages && $total_posts > 0 ) {

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return new WP_Error(

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'rest_post_invalid_page_number',

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__( 'The page number requested is larger than the number of pages available.' ),

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array( 'status' => 400 )

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);

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}

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$response = rest_ensure_response( $posts );

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$response->header( 'X-WP-Total', (int) $total_posts );

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$response->header( 'X-WP-TotalPages', (int) $max_pages );

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$request_params = $request->get_query_params();

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$collection_url = rest_url( rest_get_route_for_post_type_items( $this->post_type ) );

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$base = add_query_arg( urlencode_deep( $request_params ), $collection_url );

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if ( $page > 1 ) {

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$prev_page = $page - 1;

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if ( $prev_page > $max_pages ) {

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$prev_page = $max_pages;

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}

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$prev_link = add_query_arg( 'page', $prev_page, $base );

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$response->link_header( 'prev', $prev_link );

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}

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if ( $max_pages > $page ) {

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$next_page = $page + 1;

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$next_link = add_query_arg( 'page', $next_page, $base );

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$response->link_header( 'next', $next_link );

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}

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return $response;

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}

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/**

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* Gets the post, if the ID is valid.

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* @since 4.7.2

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* @param int $id Supplied ID.

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* @return WP_Post|WP_Error Post object if ID is valid, WP_Error otherwise.

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protected function get_post( $id ) {

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$error = new WP_Error(

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'rest_post_invalid_id',

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__( 'Invalid post ID.' ),

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array( 'status' => 404 )

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);

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if ( (int) $id <= 0 ) {

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return $error;

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}

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$post = get_post( (int) $id );

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if ( empty( $post ) || empty( $post->ID ) || $this->post_type !== $post->post_type ) {

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return $error;

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}

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return $post;

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}

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[482] Fix | Delete

/**

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* Checks if a given request has access to read a post.

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* @since 4.7.0

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

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* @return bool|WP_Error True if the request has read access for the item, WP_Error object or false otherwise.

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public function get_item_permissions_check( $request ) {

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$post = $this->get_post( $request['id'] );

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if ( is_wp_error( $post ) ) {

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return $post;

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}

[495] Fix | Delete

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if ( 'edit' === $request['context'] && $post && ! $this->check_update_permission( $post ) ) {

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return new WP_Error(

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'rest_forbidden_context',

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