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<?php

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namespace Yoast\WP\SEO\Routes;

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use WP_REST_Request;

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use WP_REST_Response;

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use WPSEO_Utils;

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use Yoast\WP\SEO\Actions\Indexables\Indexable_Head_Action;

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use Yoast\WP\SEO\Conditionals\Headless_Rest_Endpoints_Enabled_Conditional;

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use Yoast\WP\SEO\Main;

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/**

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* Head route for indexables.

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class Indexables_Head_Route implements Route_Interface {

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/**

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* The posts route constant.

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* @var string

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public const HEAD_FOR_URL_ROUTE = 'get_head';

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/**

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* The full posts route constant.

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* @var string

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public const FULL_HEAD_FOR_URL_ROUTE = Main::API_V1_NAMESPACE . '/' . self::HEAD_FOR_URL_ROUTE;

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/**

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* The head action.

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* @var Indexable_Head_Action

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private $head_action;

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/**

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* Indexable_Indexation_Route constructor.

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* @param Indexable_Head_Action $head_action The head action.

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public function __construct( Indexable_Head_Action $head_action ) {

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$this->head_action = $head_action;

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}

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/**

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* Returns the conditionals based in which this loadable should be active.

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* @return array<string>

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public static function get_conditionals() {

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return [ Headless_Rest_Endpoints_Enabled_Conditional::class ];

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}

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/**

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* Registers routes with WordPress.

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* @return void

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public function register_routes() {

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$route_args = [

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'methods' => 'GET',

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'callback' => [ $this, 'get_head' ],

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'permission_callback' => '__return_true',

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'args' => [

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'url' => [

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'validate_callback' => [ $this, 'is_valid_url' ],

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'required' => true,

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];

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\register_rest_route( Main::API_V1_NAMESPACE, self::HEAD_FOR_URL_ROUTE, $route_args );

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}

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/**

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* Gets the head of a page for a given URL.

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* @param WP_REST_Request $request The request. This request should have a url param set.

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* @return WP_REST_Response The response.

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public function get_head( WP_REST_Request $request ) {

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$url = \esc_url_raw( \utf8_uri_encode( $request['url'] ) );

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$data = $this->head_action->for_url( $url );

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return new WP_REST_Response( $data, $data->status );

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}

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/**

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* Checks if a url is a valid url.

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* @param string $url The url to check.

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* @return bool Whether or not the url is valid.

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public function is_valid_url( $url ) {

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$url = WPSEO_Utils::sanitize_url( \utf8_uri_encode( $url ) );

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if ( \filter_var( $url, \FILTER_VALIDATE_URL ) === false ) {

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return false;

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}

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return true;

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}

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}

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