- File: class-sitemap-image-parser.php
- Full Path: /home/matthif/www/wp-content/plugins/wordpress-seo/inc/sitemaps/class-sitemap-image-parser.php
- Date Modified: 02/24/2024 11:29 PM
- File size: 11.68 KB
- MIME-type: text/x-php
- Charset: utf-8
<?php
/**
* WPSEO plugin file.
*
* @package WPSEO\XML_Sitemaps
*/
/**
* Parses images from the given post.
*/
class WPSEO_Sitemap_Image_Parser {
/**
* Holds the home_url() value to speed up loops.
*
* @var string
*/
protected $home_url = '';
/**
* Holds site URL hostname.
*
* @var string
*/
protected $host = '';
/**
* Holds site URL protocol.
*
* @var string
*/
protected $scheme = 'http';
/**
* Cached set of attachments for multiple posts.
*
* @var array
*/
protected $attachments = [];
/**
* Holds blog charset value for use in DOM parsing.
*
* @var string
*/
protected $charset = 'UTF-8';
/**
* Set up URL properties for reuse.
*/
public function __construct() {
$this->home_url = home_url();
$parsed_home = wp_parse_url( $this->home_url );
if ( ! empty( $parsed_home['host'] ) ) {
$this->host = str_replace( 'www.', '', $parsed_home['host'] );
}
if ( ! empty( $parsed_home['scheme'] ) ) {
$this->scheme = $parsed_home['scheme'];
}
$this->charset = esc_attr( get_bloginfo( 'charset' ) );
}
/**
* Get set of image data sets for the given post.
*
* @param object $post Post object to get images for.
*
* @return array
*/
public function get_images( $post ) {
$images = [];
if ( ! is_object( $post ) ) {
return $images;
}
$thumbnail_id = get_post_thumbnail_id( $post->ID );
if ( $thumbnail_id ) {
$src = $this->get_absolute_url( $this->image_url( $thumbnail_id ) );
$images[] = $this->get_image_item( $post, $src );
}
/**
* Filter: 'wpseo_sitemap_content_before_parse_html_images' - Filters the post content
* before it is parsed for images.
*
* @param string $content The raw/unprocessed post content.
*/
$content = apply_filters( 'wpseo_sitemap_content_before_parse_html_images', $post->post_content );
$unfiltered_images = $this->parse_html_images( $content );
foreach ( $unfiltered_images as $image ) {
$images[] = $this->get_image_item( $post, $image['src'] );
}
foreach ( $this->parse_galleries( $content, $post->ID ) as $attachment ) {
$src = $this->get_absolute_url( $this->image_url( $attachment->ID ) );
$images[] = $this->get_image_item( $post, $src );
}
if ( $post->post_type === 'attachment' && wp_attachment_is_image( $post ) ) {
$src = $this->get_absolute_url( $this->image_url( $post->ID ) );
$images[] = $this->get_image_item( $post, $src );
}
foreach ( $images as $key => $image ) {
if ( empty( $image['src'] ) ) {
unset( $images[ $key ] );
}
}
/**
* Filter images to be included for the post in XML sitemap.
*
* @param array $images Array of image items.
* @param int $post_id ID of the post.
*/
$image_list = apply_filters( 'wpseo_sitemap_urlimages', $images, $post->ID );
if ( isset( $image_list ) && is_array( $image_list ) ) {
$images = $image_list;
}
return $images;
}
/**
* Get the images in the term description.
*
* @param object $term Term to get images from description for.
*
* @return array
*/
public function get_term_images( $term ) {
$images = $this->parse_html_images( $term->description );
foreach ( $this->parse_galleries( $term->description ) as $attachment ) {
$images[] = [
'src' => $this->get_absolute_url( $this->image_url( $attachment->ID ) ),
];
}
/**
* Filter images to be included for the term in XML sitemap.
*
* @param array $image_list Array of image items.
* @param int $term_id ID of the post.
*/
$image_list = apply_filters( 'wpseo_sitemap_urlimages_term', $images, $term->term_id );
if ( isset( $image_list ) && is_array( $image_list ) ) {
$images = $image_list;
}
return $images;
}
/**
* Parse `<img />` tags in content.
*
* @param string $content Content string to parse.
*
* @return array
*/
private function parse_html_images( $content ) {
$images = [];
if ( ! class_exists( 'DOMDocument' ) ) {
return $images;
}
if ( empty( $content ) ) {
return $images;
}
// Prevent DOMDocument from bubbling warnings about invalid HTML.
libxml_use_internal_errors( true );
$post_dom = new DOMDocument();
$post_dom->loadHTML( '<?xml encoding="' . $this->charset . '">' . $content );
// Clear the errors, so they don't get kept in memory.
libxml_clear_errors();
/**
* Image attribute.
*
* @var DOMElement $img
*/
foreach ( $post_dom->getElementsByTagName( 'img' ) as $img ) {
$src = $img->getAttribute( 'src' );
if ( empty( $src ) ) {
continue;
}
$class = $img->getAttribute( 'class' );
if ( // This detects WP-inserted images, which we need to upsize. R.
! empty( $class )
&& ( strpos( $class, 'size-full' ) === false )
&& preg_match( '|wp-image-(?P<id>\d+)|', $class, $matches )
&& get_post_status( $matches['id'] )
) {
$query_params = wp_parse_url( $src, PHP_URL_QUERY );
$src = $this->image_url( $matches['id'] );
if ( $query_params ) {
$src .= '?' . $query_params;
}
}
$src = $this->get_absolute_url( $src );
if ( strpos( $src, $this->host ) === false ) {
continue;
}
if ( $src !== esc_url( $src, null, 'attribute' ) ) {
continue;
}
$images[] = [
'src' => $src,
];
}
return $images;
}
/**
* Parse gallery shortcodes in a given content.
*
* @param string $content Content string.
* @param int $post_id Optional. ID of post being parsed.
*
* @return array Set of attachment objects.
*/
protected function parse_galleries( $content, $post_id = 0 ) {
$attachments = [];
$galleries = $this->get_content_galleries( $content );
foreach ( $galleries as $gallery ) {
$id = $post_id;
if ( ! empty( $gallery['id'] ) ) {
$id = intval( $gallery['id'] );
}
// Forked from core gallery_shortcode() to have exact same logic. R.
if ( ! empty( $gallery['ids'] ) ) {
$gallery['include'] = $gallery['ids'];
}
$gallery_attachments = $this->get_gallery_attachments( $id, $gallery );
$attachments = array_merge( $attachments, $gallery_attachments );
}
return array_unique( $attachments, SORT_REGULAR );
}
/**
* Retrieves galleries from the passed content.
*
* Forked from core to skip executing shortcodes for performance.
*
* @param string $content Content to parse for shortcodes.
*
* @return array A list of arrays, each containing gallery data.
*/
protected function get_content_galleries( $content ) {
$galleries = [];
if ( ! preg_match_all( '/' . get_shortcode_regex( [ 'gallery' ] ) . '/s', $content, $matches, PREG_SET_ORDER ) ) {
return $galleries;
}
foreach ( $matches as $shortcode ) {
$attributes = shortcode_parse_atts( $shortcode[3] );
if ( $attributes === '' ) { // Valid shortcode without any attributes. R.
$attributes = [];
}
$galleries[] = $attributes;
}
return $galleries;
}
/**
* Get image item array with filters applied.
*
* @param WP_Post $post Post object for the context.
* @param string $src Image URL.
*
* @return array
*/
protected function get_image_item( $post, $src ) {
$image = [];
/**
* Filter image URL to be included in XML sitemap for the post.
*
* @param string $src Image URL.
* @param object $post Post object.
*/
$image['src'] = apply_filters( 'wpseo_xml_sitemap_img_src', $src, $post );
/**
* Filter image data to be included in XML sitemap for the post.
*
* @param array $image {
* Array of image data.
*
* @type string $src Image URL.
* }
*
* @param object $post Post object.
*/
return apply_filters( 'wpseo_xml_sitemap_img', $image, $post );
}
/**
* Get attached image URL with filters applied. Adapted from core for speed.
*
* @param int $post_id ID of the post.
*
* @return string
*/
private function image_url( $post_id ) {
static $uploads;
if ( empty( $uploads ) ) {
$uploads = wp_upload_dir();
}
if ( $uploads['error'] !== false ) {
return '';
}
$file = get_post_meta( $post_id, '_wp_attached_file', true );
if ( empty( $file ) ) {
return '';
}
// Check that the upload base exists in the file location.
if ( strpos( $file, $uploads['basedir'] ) === 0 ) {
$src = str_replace( $uploads['basedir'], $uploads['baseurl'], $file );
}
elseif ( strpos( $file, 'wp-content/uploads' ) !== false ) {
$src = $uploads['baseurl'] . substr( $file, ( strpos( $file, 'wp-content/uploads' ) + 18 ) );
}
else {
// It's a newly uploaded file, therefore $file is relative to the baseurl.
$src = $uploads['baseurl'] . '/' . $file;
}
return apply_filters( 'wp_get_attachment_url', $src, $post_id );
}
/**
* Make absolute URL for domain or protocol-relative one.
*
* @param string $src URL to process.
*
* @return string
*/
protected function get_absolute_url( $src ) {
if ( empty( $src ) || ! is_string( $src ) ) {
return $src;
}
if ( YoastSEO()->helpers->url->is_relative( $src ) === true ) {
if ( $src[0] !== '/' ) {
return $src;
}
// The URL is relative, we'll have to make it absolute.
return $this->home_url . $src;
}
if ( strpos( $src, 'http' ) !== 0 ) {
// Protocol relative URL, we add the scheme as the standard requires a protocol.
return $this->scheme . ':' . $src;
}
return $src;
}
/**
* Returns the attachments for a gallery.
*
* @param int $id The post ID.
* @param array $gallery The gallery config.
*
* @return array The selected attachments.
*/
protected function get_gallery_attachments( $id, $gallery ) {
// When there are attachments to include.
if ( ! empty( $gallery['include'] ) ) {
return $this->get_gallery_attachments_for_included( $gallery['include'] );
}
// When $id is empty, just return empty array.
if ( empty( $id ) ) {
return [];
}
return $this->get_gallery_attachments_for_parent( $id, $gallery );
}
/**
* Returns the attachments for the given ID.
*
* @param int $id The post ID.
* @param array $gallery The gallery config.
*
* @return array The selected attachments.
*/
protected function get_gallery_attachments_for_parent( $id, $gallery ) {
$query = [
'posts_per_page' => -1,
'post_parent' => $id,
];
// When there are posts that should be excluded from result set.
if ( ! empty( $gallery['exclude'] ) ) {
$query['post__not_in'] = wp_parse_id_list( $gallery['exclude'] );
}
return $this->get_attachments( $query );
}
/**
* Returns an array with attachments for the post IDs that will be included.
*
* @param array $included_ids Array with IDs to include.
*
* @return array The found attachments.
*/
protected function get_gallery_attachments_for_included( $included_ids ) {
$ids_to_include = wp_parse_id_list( $included_ids );
$attachments = $this->get_attachments(
[
'posts_per_page' => count( $ids_to_include ),
'post__in' => $ids_to_include,
]
);
$gallery_attachments = [];
foreach ( $attachments as $val ) {
$gallery_attachments[ $val->ID ] = $val;
}
return $gallery_attachments;
}
/**
* Returns the attachments.
*
* @param array $args Array with query args.
*
* @return array The found attachments.
*/
protected function get_attachments( $args ) {
$default_args = [
'post_status' => 'inherit',
'post_type' => 'attachment',
'post_mime_type' => 'image',
// Defaults taken from function get_posts.
'orderby' => 'date',
'order' => 'DESC',
'meta_key' => '',
'meta_value' => '',
'suppress_filters' => true,
'ignore_sticky_posts' => true,
'no_found_rows' => true,
];
$args = wp_parse_args( $args, $default_args );
$get_attachments = new WP_Query();
return $get_attachments->query( $args );
}
}