Current File : /var/www/knwn/wp-content/plugins/wordpress-seo/src/builders/indexable-link-builder.php
<?php
namespace Yoast\WP\SEO\Builders;
use Yoast\WP\SEO\Helpers\Image_Helper;
use Yoast\WP\SEO\Helpers\Post_Helper;
use Yoast\WP\SEO\Helpers\Url_Helper;
use Yoast\WP\SEO\Models\Indexable;
use Yoast\WP\SEO\Models\SEO_Links;
use Yoast\WP\SEO\Repositories\Indexable_Repository;
use Yoast\WP\SEO\Repositories\SEO_Links_Repository;
/**
* Indexable link builder.
*/
class Indexable_Link_Builder {
/**
* The SEO links repository.
*
* @var SEO_Links_Repository
*/
protected $seo_links_repository;
/**
* The url helper.
*
* @var Url_Helper
*/
protected $url_helper;
/**
* The image helper.
*
* @var Image_Helper
*/
protected $image_helper;
/**
* The post helper.
*
* @var Post_Helper
*/
protected $post_helper;
/**
* The indexable repository.
*
* @var Indexable_Repository
*/
protected $indexable_repository;
/**
* Indexable_Link_Builder constructor.
*
* @param SEO_Links_Repository $seo_links_repository The SEO links repository.
* @param Url_Helper $url_helper The URL helper.
* @param Post_Helper $post_helper The post helper.
*/
public function __construct(
SEO_Links_Repository $seo_links_repository,
Url_Helper $url_helper,
Post_Helper $post_helper
) {
$this->seo_links_repository = $seo_links_repository;
$this->url_helper = $url_helper;
$this->post_helper = $post_helper;
}
/**
* Sets the indexable repository.
*
* @required
*
* @param Indexable_Repository $indexable_repository The indexable repository.
* @param Image_Helper $image_helper The image helper.
*
* @return void
*/
public function set_dependencies(
Indexable_Repository $indexable_repository,
Image_Helper $image_helper
) {
$this->indexable_repository = $indexable_repository;
$this->image_helper = $image_helper;
}
/**
* Builds the links for a post.
*
* @param Indexable $indexable The indexable.
* @param string $content The content. Expected to be unfiltered.
*
* @return SEO_Links[] The created SEO links.
*/
public function build( $indexable, $content ) {
global $post;
if ( $indexable->object_type === 'post' ) {
$post_backup = $post;
// phpcs:ignore WordPress.WP.GlobalVariablesOverride.Prohibited -- To setup the post we need to do this explicitly.
$post = $this->post_helper->get_post( $indexable->object_id );
\setup_postdata( $post );
$content = \apply_filters( 'the_content', $content );
\wp_reset_postdata();
// phpcs:ignore WordPress.WP.GlobalVariablesOverride.Prohibited -- To setup the post we need to do this explicitly.
$post = $post_backup;
}
$content = \str_replace( ']]>', ']]>', $content );
$links = $this->gather_links( $content );
$images = $this->gather_images( $content );
if ( empty( $links ) && empty( $images ) ) {
$indexable->link_count = 0;
$this->update_related_indexables( $indexable, [] );
return [];
}
$links = $this->create_links( $indexable, $links, $images );
$this->update_related_indexables( $indexable, $links );
$indexable->link_count = $this->get_internal_link_count( $links );
return $links;
}
/**
* Deletes all SEO links for an indexable.
*
* @param Indexable $indexable The indexable.
*
* @return void
*/
public function delete( $indexable ) {
$links = ( $this->seo_links_repository->find_all_by_indexable_id( $indexable->id ) );
$this->seo_links_repository->delete_all_by_indexable_id( $indexable->id );
$linked_indexable_ids = [];
foreach ( $links as $link ) {
$linked_indexable_ids[] = $link->target_indexable_id;
}
$this->update_incoming_links_for_related_indexables( $linked_indexable_ids );
}
/**
* Gathers all links from content.
*
* @param string $content The content.
*
* @return string[] An array of urls.
*/
protected function gather_links( $content ) {
if ( \strpos( $content, 'href' ) === false ) {
// Nothing to do.
return [];
}
$links = [];
$regexp = '<a\s[^>]*href=("??)([^" >]*?)\1[^>]*>';
// Used modifiers iU to match case insensitive and make greedy quantifiers lazy.
if ( \preg_match_all( "/$regexp/iU", $content, $matches, \PREG_SET_ORDER ) ) {
foreach ( $matches as $match ) {
$links[] = \trim( $match[2], "'" );
}
}
return $links;
}
/**
* Gathers all images from content.
*
* @param string $content The content.
*
* @return string[] An array of urls.
*/
protected function gather_images( $content ) {
if ( \strpos( $content, 'src' ) === false ) {
// Nothing to do.
return [];
}
$images = [];
$regexp = '<img\s[^>]*src=("??)([^" >]*?)\\1[^>]*>';
// Used modifiers iU to match case insensitive and make greedy quantifiers lazy.
if ( \preg_match_all( "/$regexp/iU", $content, $matches, \PREG_SET_ORDER ) ) {
foreach ( $matches as $match ) {
$images[] = \trim( $match[2], "'" );
}
}
return $images;
}
/**
* Creates link models from lists of URLs and image sources.
*
* @param Indexable $indexable The indexable.
* @param string[] $links The link URLs.
* @param string[] $images The image sources.
*
* @return SEO_Links[] The link models.
*/
protected function create_links( $indexable, $links, $images ) {
$home_url = \wp_parse_url( \home_url() );
$current_url = \wp_parse_url( $indexable->permalink );
$links = \array_map(
function( $link ) use ( $home_url, $indexable ) {
return $this->create_internal_link( $link, $home_url, $indexable );
},
$links
);
// Filter out links to the same page with a fragment or query.
$links = \array_filter(
$links,
function ( $link ) use ( $current_url ) {
return $this->filter_link( $link, $current_url );
}
);
$images = \array_map(
function( $link ) use ( $home_url, $indexable ) {
return $this->create_internal_link( $link, $home_url, $indexable, true );
},
$images
);
return \array_merge( $links, $images );
}
/**
* Get the post ID based on the link's type and its target's permalink.
*
* @param string $type The type of link (either SEO_Links::TYPE_INTERNAL or SEO_Links::TYPE_INTERNAL_IMAGE).
* @param string $permalink The permalink of the link's target.
*
* @return int The post ID.
*/
protected function get_post_id( $type, $permalink ) {
if ( $type === SEO_Links::TYPE_INTERNAL ) {
return \url_to_postid( $permalink );
}
return $this->image_helper->get_attachment_by_url( $permalink );
}
/**
* Creates an internal link.
*
* @param string $url The url of the link.
* @param array $home_url The home url, as parsed by wp_parse_url.
* @param Indexable $indexable The indexable of the post containing the link.
* @param bool $is_image Whether or not the link is an image.
*
* @return SEO_Links The created link.
*/
protected function create_internal_link( $url, $home_url, $indexable, $is_image = false ) {
$parsed_url = \wp_parse_url( $url );
$link_type = $this->url_helper->get_link_type( $parsed_url, $home_url, $is_image );
/**
* ORM representing a link in the SEO Links table.
*
* @var SEO_Links $model
*/
$model = $this->seo_links_repository->query()->create(
[
'url' => $url,
'type' => $link_type,
'indexable_id' => $indexable->id,
'post_id' => $indexable->object_id,
]
);
$model->parsed_url = $parsed_url;
if ( $model->type === SEO_Links::TYPE_INTERNAL || $model->type === SEO_Links::TYPE_INTERNAL_IMAGE ) {
$permalink = $this->get_permalink( $url, $home_url );
if ( $this->url_helper->is_relative( $permalink ) ) {
// Make sure we're checking against the absolute URL, and add a trailing slash if the site has a trailing slash in its permalink settings.
$permalink = $this->url_helper->ensure_absolute_url( \user_trailingslashit( $permalink ) );
}
$target = $this->indexable_repository->find_by_permalink( $permalink );
if ( ! $target ) {
// If target indexable cannot be found, create one based on the post's post ID.
$post_id = $this->get_post_id( $model->type, $permalink );
if ( $post_id && $post_id !== 0 ) {
$target = $this->indexable_repository->find_by_id_and_type( $post_id, 'post' );
}
}
if ( ! $target ) {
return $model;
}
$model->target_indexable_id = $target->id;
if ( $target->object_type === 'post' ) {
$model->target_post_id = $target->object_id;
}
}
if ( $is_image && $model->target_post_id ) {
$file = \get_attached_file( $model->target_post_id );
if ( $file ) {
list( , $width, $height ) = \wp_get_attachment_image_src( $model->target_post_id, 'full' );
$model->width = $width;
$model->height = $height;
$model->size = \filesize( $file );
}
else {
$model->width = 0;
$model->height = 0;
$model->size = 0;
}
}
if ( $model->target_indexable_id ) {
$model->language = $target->language;
$model->region = $target->region;
}
return $model;
}
/**
* Filters out links that point to the same page with a fragment or query.
*
* @param SEO_Links $link The link.
* @param array $current_url The url of the page the link is on, as parsed by wp_parse_url.
*
* @return bool Whether or not the link should be filtered.
*/
protected function filter_link( SEO_Links $link, $current_url ) {
$url = $link->parsed_url;
// Always keep external links.
if ( $link->type === SEO_Links::TYPE_EXTERNAL ) {
return true;
}
// Always keep links with an empty path or pointing to other pages.
if ( isset( $url['path'] ) ) {
return empty( $url['path'] ) || $url['path'] !== $current_url['path'];
}
// Only keep links to the current page without a fragment or query.
return ( ! isset( $url['fragment'] ) && ! isset( $url['query'] ) );
}
/**
* Updates the link counts for related indexables.
*
* @param Indexable $indexable The indexable.
* @param SEO_Links[] $links The link models.
*
* @return void
*/
protected function update_related_indexables( $indexable, $links ) {
// Old links were only stored by post id, so remove all old seo links for this post that have no indexable id.
// This can be removed if we ever fully clear all seo links.
if ( $indexable->object_type === 'post' ) {
$this->seo_links_repository->delete_all_by_post_id_where_indexable_id_null( $indexable->object_id );
}
$updated_indexable_ids = [];
$old_links = $this->seo_links_repository->find_all_by_indexable_id( $indexable->id );
$links_to_remove = $this->links_diff( $old_links, $links );
$links_to_add = $this->links_diff( $links, $old_links );
if ( ! empty( $links_to_remove ) ) {
$this->seo_links_repository->delete_many_by_id( \wp_list_pluck( $links_to_remove, 'id' ) );
}
if ( ! empty( $links_to_add ) ) {
$this->seo_links_repository->insert_many( $links_to_add );
}
foreach ( $links_to_add as $link ) {
if ( $link->target_indexable_id ) {
$updated_indexable_ids[] = $link->target_indexable_id;
}
}
foreach ( $links_to_remove as $link ) {
$updated_indexable_ids[] = $link->target_indexable_id;
}
$this->update_incoming_links_for_related_indexables( $updated_indexable_ids );
}
/**
* Creates a diff between two arrays of SEO links, based on urls.
*
* @param SEO_Links[] $links_a The array to compare.
* @param SEO_Links[] $links_b The array to compare against.
*
* @return SEO_Links[] Links that are in $links_a, but not in $links_b.
*/
protected function links_diff( $links_a, $links_b ) {
return \array_udiff(
$links_a,
$links_b,
static function( SEO_Links $link_a, SEO_Links $link_b ) {
return \strcmp( $link_a->url, $link_b->url );
}
);
}
/**
* Returns the number of internal links in an array of link models.
*
* @param SEO_Links[] $links The link models.
*
* @return int The number of internal links.
*/
protected function get_internal_link_count( $links ) {
$internal_link_count = 0;
foreach ( $links as $link ) {
if ( $link->type === SEO_Links::TYPE_INTERNAL ) {
++$internal_link_count;
}
}
return $internal_link_count;
}
/**
* Returns a cleaned permalink for a given link.
*
* @param string $link The raw URL.
* @param array $home_url The home URL, as parsed by wp_parse_url.
*
* @return string The cleaned permalink.
*/
protected function get_permalink( $link, $home_url ) {
// Get rid of the #anchor.
$url_split = \explode( '#', $link );
$link = $url_split[0];
// Get rid of URL ?query=string.
$url_split = \explode( '?', $link );
$link = $url_split[0];
// Set the correct URL scheme.
$link = \set_url_scheme( $link, $home_url['scheme'] );
// Add 'www.' if it is absent and should be there.
if ( \strpos( $home_url['host'], 'www.' ) === 0 && \strpos( $link, '://www.' ) === false ) {
$link = \str_replace( '://', '://www.', $link );
}
// Strip 'www.' if it is present and shouldn't be.
if ( \strpos( $home_url['host'], 'www.' ) !== 0 ) {
$link = \str_replace( '://www.', '://', $link );
}
return $link;
}
/**
* Updates incoming link counts for related indexables.
*
* @param int[] $related_indexable_ids The IDs of all related indexables.
*
* @return void
*/
protected function update_incoming_links_for_related_indexables( $related_indexable_ids ) {
if ( empty( $related_indexable_ids ) ) {
return;
}
$counts = $this->seo_links_repository->get_incoming_link_counts_for_indexable_ids( $related_indexable_ids );
foreach ( $counts as $count ) {
$this->indexable_repository->update_incoming_link_count( $count['target_indexable_id'], $count['incoming'] );
}
}
}
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