*/
namespace RankMath\Image_Seo;
use stdClass;
use RankMath\Helper;
use RankMath\Traits\Hooker;
use RankMath\Helpers\HTML;
defined( 'ABSPATH' ) || exit;
/**
* Add Attributes class.
*/
class Add_Attributes {
use Hooker;
/**
* Stores the image alt format if it is set.
*
* @var string|false
*/
public $is_alt;
/**
* Stores the image title format if it is set.
*
* @var string|false
*/
public $is_title;
/**
* The Constructor.
*/
public function __construct() {
$this->action( 'wp', 'add_attributes', 9999 );
$this->action( 'rest_api_init', 'add_attributes' );
}
/**
* Add nofollow, target, title and alt attributes to images.
*/
public function add_attributes() {
// Add image title and alt.
$this->is_alt = Helper::get_settings( 'general.add_img_alt' ) && Helper::get_settings( 'general.img_alt_format' ) ? trim( Helper::get_settings( 'general.img_alt_format' ) ) : false;
$this->is_title = Helper::get_settings( 'general.add_img_title' ) && Helper::get_settings( 'general.img_title_format' ) ? trim( Helper::get_settings( 'general.img_title_format' ) ) : false;
if ( $this->is_alt || $this->is_title ) {
$this->filter( 'the_content', 'add_img_attributes', 11 );
$this->filter( 'post_thumbnail_html', 'add_img_attributes', 11, 2 );
$this->filter( 'woocommerce_single_product_image_thumbnail_html', 'add_img_attributes', 11 );
}
}
/**
* Add 'title' and 'alt' attribute to image.
*
* @param string $content Post content.
* @param null|int $post_id The current post ID.
* @return string
*/
public function add_img_attributes( $content, $post_id = null ) {
if ( empty( $content ) ) {
return $content;
}
$stripped_content = preg_replace( '@<(script|style)[^>]*?>.*?\\1>@si', '', $content );
preg_match_all( '/]+)\/?>/iU', $stripped_content, $matches, PREG_SET_ORDER );
if ( empty( $matches ) ) {
return $content;
}
$post = $this->get_post( $post_id );
foreach ( $matches as $image ) {
$is_dirty = false;
$attrs = HTML::extract_attributes( $image[0] );
if ( ! isset( $attrs['src'] ) && ! isset( $attrs['data-ct-lazy'] ) ) {
continue;
}
$post->filename = isset( $attrs['data-ct-lazy'] ) ? $attrs['data-ct-lazy'] : $attrs['src'];
// Lazy load support.
if ( ! empty( $attrs['data-src'] ) ) {
$post->filename = $attrs['data-src'];
} elseif ( ! empty( $attrs['data-layzr'] ) ) {
$post->filename = $attrs['data-layzr'];
} elseif ( ! empty( $attrs['nitro-lazy-srcset'] ) ) {
$post->filename = $attrs['nitro-lazy-srcset'];
}
// Pass attributes so they can be used later.
$post->alttext = isset( $attrs['alt'] ) ? $attrs['alt'] : '';
$post->titletext = isset( $attrs['title'] ) ? $attrs['title'] : '';
$this->set_image_attribute( $attrs, 'alt', $this->is_alt, $is_dirty, $post );
$this->set_image_attribute( $attrs, 'title', $this->is_title, $is_dirty, $post );
if ( $is_dirty ) {
$new = '';
$content = str_replace( $image[0], $new, $content );
}
}
return $content;
}
/**
* Get post object.
*
* @param null|int $post_id The post ID.
* @return object
*/
private function get_post( $post_id = null ) {
$post = \get_post( $post_id );
if ( empty( $post ) ) {
$post = new stdClass();
}
return $post;
}
/**
* Set image attribute after checking condition.
*
* @param array $attrs Array which hold rel attribute.
* @param string $attribute Attribute to set.
* @param boolean $condition Condition to check.
* @param boolean $is_dirty Is dirty variable.
* @param object $post Post Object.
*/
private function set_image_attribute( &$attrs, $attribute, $condition, &$is_dirty, $post ) {
if ( $condition && empty( $attrs[ $attribute ] ) ) {
$is_dirty = true;
$attrs[ $attribute ] = trim( Helper::replace_vars( $condition, $post ) );
}
}
}