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<?php

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/**

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* REST API: WP_REST_Terms_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 used to managed terms associated with a taxonomy 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_Terms_Controller extends WP_REST_Controller {

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/**

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* Taxonomy key.

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* @since 4.7.0

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* @var string

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protected $taxonomy;

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/**

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* Instance of a term meta fields object.

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* @since 4.7.0

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* @var WP_REST_Term_Meta_Fields

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protected $meta;

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/**

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* Column to have the terms be sorted by.

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* @since 4.7.0

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* @var string

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protected $sort_column;

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/**

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* Number of terms that were found.

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* @since 4.7.0

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* @var int

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protected $total_terms;

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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 $taxonomy Taxonomy key.

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public function __construct( $taxonomy ) {

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$this->taxonomy = $taxonomy;

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$tax_obj = get_taxonomy( $taxonomy );

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

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

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$this->meta = new WP_REST_Term_Meta_Fields( $taxonomy );

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}

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/**

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* Registers the routes for terms.

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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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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 term.' ),

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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' => 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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'type' => 'boolean',

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'default' => false,

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'description' => __( 'Required to be true, as terms do not support trashing.' ),

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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 the terms for a post can be read.

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* @since 6.0.3

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* @param WP_Post $post Post object.

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

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* @return bool Whether the terms for the post can be read.

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public function check_read_terms_permission_for_post( $post, $request ) {

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// If the requested post isn't associated with this taxonomy, deny access.

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if ( ! is_object_in_taxonomy( $post->post_type, $this->taxonomy ) ) {

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return false;

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}

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// Grant access if the post is publicly viewable.

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if ( is_post_publicly_viewable( $post ) ) {

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return true;

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}

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// Otherwise grant access if the post is readable by the logged in user.

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if ( current_user_can( 'read_post', $post->ID ) ) {

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return true;

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}

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// Otherwise, deny access.

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return false;

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}

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/**

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* Checks if a request has access to read terms in the specified taxonomy.

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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, otherwise false or WP_Error object.

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public function get_items_permissions_check( $request ) {

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$tax_obj = get_taxonomy( $this->taxonomy );

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if ( ! $tax_obj || ! $this->check_is_taxonomy_allowed( $this->taxonomy ) ) {

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return false;

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}

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

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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 terms in this taxonomy.' ),

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array( 'status' => rest_authorization_required_code() )

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);

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}

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if ( ! empty( $request['post'] ) ) {

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$post = get_post( $request['post'] );

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if ( ! $post ) {

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return new WP_Error(

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'rest_post_invalid_id',

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__( 'Invalid post ID.' ),

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array(

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'status' => 400,

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)

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);

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}

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if ( ! $this->check_read_terms_permission_for_post( $post, $request ) ) {

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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 view terms for this post.' ),

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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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}

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return true;

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}

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/**

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* Retrieves terms associated with a taxonomy.

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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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// Retrieve the list of registered collection query parameters.

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$registered = $this->get_collection_params();

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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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'exclude' => 'exclude',

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'include' => 'include',

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'order' => 'order',

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'orderby' => 'orderby',

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'post' => 'post',

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'hide_empty' => 'hide_empty',

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'per_page' => 'number',

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'search' => 'search',

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'slug' => 'slug',

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);

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$prepared_args = array( 'taxonomy' => $this->taxonomy );

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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 $prepared_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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$prepared_args[ $wp_param ] = $request[ $api_param ];

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}

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}

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if ( isset( $prepared_args['orderby'] ) && isset( $request['orderby'] ) ) {

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$orderby_mappings = array(

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'include_slugs' => 'slug__in',

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);

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if ( isset( $orderby_mappings[ $request['orderby'] ] ) ) {

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$prepared_args['orderby'] = $orderby_mappings[ $request['orderby'] ];

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}

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}

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if ( isset( $registered['offset'] ) && ! empty( $request['offset'] ) ) {

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$prepared_args['offset'] = $request['offset'];

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} else {

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$prepared_args['offset'] = ( $request['page'] - 1 ) * $prepared_args['number'];

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}

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$taxonomy_obj = get_taxonomy( $this->taxonomy );

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if ( $taxonomy_obj->hierarchical && isset( $registered['parent'], $request['parent'] ) ) {

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if ( 0 === $request['parent'] ) {

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// Only query top-level terms.

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$prepared_args['parent'] = 0;

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} else {

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if ( $request['parent'] ) {

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$prepared_args['parent'] = $request['parent'];

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}

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}

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}

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/**

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* Filters get_terms() arguments when querying terms via the REST API.

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

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* Possible hook names include:

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* - `rest_category_query`

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* - `rest_post_tag_query`

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* Enables adding extra arguments or setting defaults for a terms

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* collection request.

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* @since 4.7.0

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* @link https://developer.wordpress.org/reference/functions/get_terms/

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* @param array $prepared_args Array of arguments for get_terms().

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* @param WP_REST_Request $request The REST API request.

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

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if ( ! empty( $prepared_args['post'] ) ) {

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$query_result = wp_get_object_terms( $prepared_args['post'], $this->taxonomy, $prepared_args );

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// Used when calling wp_count_terms() below.

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$prepared_args['object_ids'] = $prepared_args['post'];

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} else {

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$query_result = get_terms( $prepared_args );

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}

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$count_args = $prepared_args;

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unset( $count_args['number'], $count_args['offset'] );

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$total_terms = wp_count_terms( $count_args );

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// wp_count_terms() can return a falsey value when the term has no children.

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if ( ! $total_terms ) {

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$total_terms = 0;

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}

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$response = array();

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foreach ( $query_result as $term ) {

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if ( 'edit' === $request['context'] && ! current_user_can( 'edit_term', $term->term_id ) ) {

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continue;

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}

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

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

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}

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$response = rest_ensure_response( $response );

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// Store pagination values for headers.

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$per_page = (int) $prepared_args['number'];

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$page = (int) ceil( ( ( (int) $prepared_args['offset'] ) / $per_page ) + 1 );

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

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$max_pages = (int) ceil( $total_terms / $per_page );

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

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$request_params = $request->get_query_params();

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$collection_url = rest_url( rest_get_route_for_taxonomy_items( $this->taxonomy ) );

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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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* Get the term, 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_Term|WP_Error Term object if ID is valid, WP_Error otherwise.

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protected function get_term( $id ) {

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$error = new WP_Error(

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'rest_term_invalid',

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__( 'Term does not exist.' ),

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array( 'status' => 404 )

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);

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if ( ! $this->check_is_taxonomy_allowed( $this->taxonomy ) ) {

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return $error;

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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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$term = get_term( (int) $id, $this->taxonomy );

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if ( empty( $term ) || $term->taxonomy !== $this->taxonomy ) {

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return $error;

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}

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return $term;

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}

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/**

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* Checks if a request has access to read or edit the specified term.

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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 for the item, otherwise WP_Error object.

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public function get_item_permissions_check( $request ) {

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$term = $this->get_term( $request['id'] );

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if ( is_wp_error( $term ) ) {

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return $term;

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}

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if ( 'edit' === $request['context'] && ! current_user_can( 'edit_term', $term->term_id ) ) {

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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 this term.' ),

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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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* Gets a single term from a taxonomy.

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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_item( $request ) {

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$term = $this->get_term( $request['id'] );

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if ( is_wp_error( $term ) ) {

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return $term;

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}

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$response = $this->prepare_item_for_response( $term, $request );

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return rest_ensure_response( $response );

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}

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/**

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* Checks if a request has access to create a term.

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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 access to create items, false or WP_Error object otherwise.

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public function create_item_permissions_check( $request ) {

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if ( ! $this->check_is_taxonomy_allowed( $this->taxonomy ) ) {

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return false;

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}

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$taxonomy_obj = get_taxonomy( $this->taxonomy );

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if ( ( is_taxonomy_hierarchical( $this->taxonomy )

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&& ! current_user_can( $taxonomy_obj->cap->edit_terms ) )

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|| ( ! is_taxonomy_hierarchical( $this->taxonomy )

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&& ! current_user_can( $taxonomy_obj->cap->assign_terms ) ) ) {

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return new WP_Error(

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'rest_cannot_create',

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__( 'Sorry, you are not allowed to create terms in this taxonomy.' ),

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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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[491] Fix | Delete

/**

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* Creates a single term in a taxonomy.

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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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