You cannot select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
99 lines
2.9 KiB
PHP
99 lines
2.9 KiB
PHP
<?php
|
|
/**
|
|
* Class Canonical_Sanitizer.
|
|
*
|
|
* @link https://github.com/googleforcreators/web-stories-wp
|
|
*
|
|
* @copyright 2020 Google LLC
|
|
* @license https://www.apache.org/licenses/LICENSE-2.0 Apache License 2.0
|
|
*/
|
|
|
|
/**
|
|
* Copyright 2020 Google LLC
|
|
*
|
|
* Licensed under the Apache License, Version 2.0 (the "License");
|
|
* you may not use this file except in compliance with the License.
|
|
* You may obtain a copy of the License at
|
|
*
|
|
* https://www.apache.org/licenses/LICENSE-2.0
|
|
*
|
|
* Unless required by applicable law or agreed to in writing, software
|
|
* distributed under the License is distributed on an "AS IS" BASIS,
|
|
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
|
|
* See the License for the specific language governing permissions and
|
|
* limitations under the License.
|
|
*/
|
|
|
|
declare(strict_types = 1);
|
|
|
|
namespace Google\Web_Stories\AMP;
|
|
|
|
use DOMElement;
|
|
use DOMNode;
|
|
use DOMNodeList;
|
|
use Google\Web_Stories_Dependencies\AMP_Base_Sanitizer;
|
|
use Google\Web_Stories_Dependencies\AmpProject\Html\Attribute;
|
|
use Google\Web_Stories_Dependencies\AmpProject\Html\Tag;
|
|
|
|
/**
|
|
* Canonical sanitizer class.
|
|
*
|
|
* Ensures link[rel=canonical] exists on the page,
|
|
* as some plugins might have removed it in the meantime
|
|
* or the user might be viewing a draft.
|
|
*
|
|
* Only needed when the AMP plugin is not active, as the plugin
|
|
* handles that already.
|
|
*
|
|
* @since 1.1.0
|
|
*
|
|
* @link https://github.com/googleforcreators/web-stories-wp/issues/4193
|
|
* @link https://github.com/googleforcreators/web-stories-wp/pull/8169
|
|
* @see \AMP_Theme_Support::ensure_required_markup()
|
|
*/
|
|
class Canonical_Sanitizer extends AMP_Base_Sanitizer {
|
|
/**
|
|
* Sanitize the HTML contained in the DOMDocument received by the constructor.
|
|
*
|
|
* @since 1.1.0
|
|
*/
|
|
public function sanitize(): void {
|
|
$canonical_url = $this->args['canonical_url'];
|
|
|
|
$query = $this->dom->xpath->query( '//link[@rel="canonical"]', $this->dom->head );
|
|
|
|
// Remove any duplicate items first.
|
|
if ( $query instanceof DOMNodeList && $query->length > 1 ) {
|
|
for ( $i = 1; $i < $query->length; $i++ ) {
|
|
$node = $query->item( $i );
|
|
if ( $node ) {
|
|
$this->dom->head->removeChild( $node );
|
|
}
|
|
}
|
|
}
|
|
|
|
/**
|
|
* DOMElement
|
|
*
|
|
* @var DOMElement|DOMNode $rel_canonical
|
|
*/
|
|
$rel_canonical = $query instanceof DOMNodeList ? $query->item( 0 ) : null;
|
|
|
|
if ( ! $rel_canonical instanceof DOMElement ) {
|
|
$rel_canonical = $this->dom->createElement( Tag::LINK );
|
|
|
|
if ( $rel_canonical instanceof DOMElement ) {
|
|
$rel_canonical->setAttribute( Attribute::REL, Attribute::REL_CANONICAL );
|
|
$this->dom->head->appendChild( $rel_canonical );
|
|
}
|
|
}
|
|
|
|
if ( $rel_canonical instanceof DOMElement ) {
|
|
// Ensure link[rel=canonical] has a non-empty href attribute.
|
|
if ( empty( $rel_canonical->getAttribute( Attribute::HREF ) ) ) {
|
|
$rel_canonical->setAttribute( Attribute::HREF, (string) $canonical_url );
|
|
}
|
|
}
|
|
}
|
|
}
|