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Edit File: class.jetpack-post-images.php

<?php // phpcs:ignore WordPress.Files.FileName.InvalidClassFileName
/**
 * Useful for finding an image to display alongside/in representation of a specific post.
 *
 * @package automattic/jetpack
 */

use Automattic\Jetpack\Image_CDN\Image_CDN_Core;

/**
 * Useful for finding an image to display alongside/in representation of a specific post.
 *
 * Includes a few different methods, all of which return a similar-format array containing
 * details of any images found. Everything can (should) be called statically, it's just a
 * function-bucket. You can also call Jetpack_PostImages::get_image() to cycle through all of the methods until
 * one of them finds something useful.
 *
 * This file is included verbatim in Jetpack
 */
class Jetpack_PostImages {
	/**
	 * If a slideshow is embedded within a post, then parse out the images involved and return them
	 *
	 * @param int $post_id Post ID.
	 * @param int $width Image width.
	 * @param int $height Image height.
	 * @return array Images.
	 */
	public static function from_slideshow( $post_id, $width = 200, $height = 200 ) {
		$images = array();

$post = get_post( $post_id );

if ( ! $post ) {
			return $images;
		}

if ( ! empty( $post->post_password ) ) {
			return $images;
		}

if ( false === has_shortcode( $post->post_content, 'slideshow' ) ) {
			return $images; // no slideshow - bail.
		}

$permalink = get_permalink( $post->ID );

// Mechanic: Somebody set us up the bomb.
		$old_post                  = $GLOBALS['post'];
		$GLOBALS['post']           = $post; // phpcs:ignore WordPress.WP.GlobalVariablesOverride.Prohibited
		$old_shortcodes            = $GLOBALS['shortcode_tags'];
		$GLOBALS['shortcode_tags'] = array( 'slideshow' => $old_shortcodes['slideshow'] ); // phpcs:ignore WordPress.WP.GlobalVariablesOverride.Prohibited

// Find all the slideshows.
		preg_match_all( '/' . get_shortcode_regex() . '/sx', $post->post_content, $slideshow_matches, PREG_SET_ORDER );

ob_start(); // The slideshow shortcode handler calls wp_print_scripts and wp_print_styles... not too happy about that.

foreach ( $slideshow_matches as $slideshow_match ) {
			$slideshow = do_shortcode_tag( $slideshow_match );
			$pos       = stripos( $slideshow, 'jetpack-slideshow' );
			if ( false === $pos ) { // must be something wrong - or we changed the output format in which case none of the following will work.
				continue;
			}
			$start       = strpos( $slideshow, '[', $pos );
			$end         = strpos( $slideshow, ']', $start );
			$post_images = json_decode( wp_specialchars_decode( str_replace( "'", '"', substr( $slideshow, $start, $end - $start + 1 ) ), ENT_QUOTES ) ); // parse via JSON
			// If the JSON didn't decode don't try and act on it.
			if ( is_array( $post_images ) ) {
				foreach ( $post_images as $post_image ) {
					$post_image_id = absint( $post_image->id );
					if ( ! $post_image_id ) {
						continue;
					}

$meta = wp_get_attachment_metadata( $post_image_id );

// Must be larger than 200x200 (or user-specified).
					if ( ! isset( $meta['width'] ) || $meta['width'] < $width ) {
						continue;
					}
					if ( ! isset( $meta['height'] ) || $meta['height'] < $height ) {
						continue;
					}

$url = wp_get_attachment_url( $post_image_id );

$images[] = array(
						'type'       => 'image',
						'from'       => 'slideshow',
						'src'        => $url,
						'src_width'  => $meta['width'],
						'src_height' => $meta['height'],
						'href'       => $permalink,
					);
				}
			}
		}
		ob_end_clean();

// Operator: Main screen turn on.
		$GLOBALS['shortcode_tags'] = $old_shortcodes; // phpcs:ignore WordPress.WP.GlobalVariablesOverride.Prohibited
		$GLOBALS['post']           = $old_post; // phpcs:ignore WordPress.WP.GlobalVariablesOverride.Prohibited

return $images;
	}

/**
	 * Filtering out images with broken URL from galleries.
	 *
	 * @param array $galleries Galleries.
	 * @return array $filtered_galleries
	 */
	public static function filter_gallery_urls( $galleries ) {
		$filtered_galleries = array();
		foreach ( $galleries as $this_gallery ) {
			if ( ! isset( $this_gallery['src'] ) ) {
				continue;
			}
			$ids = isset( $this_gallery['ids'] ) ? explode( ',', $this_gallery['ids'] ) : array();
			// Make sure 'src' array isn't associative and has no holes.
			$this_gallery['src'] = array_values( $this_gallery['src'] );
			foreach ( $this_gallery['src'] as $idx => $src_url ) {
				if ( filter_var( $src_url, FILTER_VALIDATE_URL, FILTER_FLAG_PATH_REQUIRED ) === false ) {
					unset( $this_gallery['src'][ $idx ] );
					unset( $ids[ $idx ] );
				}
			}
			if ( isset( $this_gallery['ids'] ) ) {
				$this_gallery['ids'] = implode( ',', $ids );
			}
			// Remove any holes we introduced.
			$this_gallery['src']  = array_values( $this_gallery['src'] );
			$filtered_galleries[] = $this_gallery;
		}

return $filtered_galleries;
	}

/**
	 * If a gallery is detected, then get all the images from it.
	 *
	 * @param int $post_id Post ID.
	 * @return array Images.
	 */
	public static function from_gallery( $post_id ) {
		$images = array();

$post = get_post( $post_id );

if ( ! $post ) {
			return $images;
		}

if ( ! empty( $post->post_password ) ) {
			return $images;
		}
		add_filter( 'get_post_galleries', array( __CLASS__, 'filter_gallery_urls' ), 999999 );

$permalink = get_permalink( $post->ID );

/**
		 *  Juggle global post object because the gallery shortcode uses the
		 *  global object.
		 *
		 *  See core ticket:
		 *  https://core.trac.wordpress.org/ticket/39304
		 */
		// phpcs:disable WordPress.WP.GlobalVariablesOverride.Prohibited
		if ( isset( $GLOBALS['post'] ) ) {
			$juggle_post     = $GLOBALS['post'];
			$GLOBALS['post'] = $post;
			$galleries       = get_post_galleries( $post->ID, false );
			$GLOBALS['post'] = $juggle_post;
		} else {
			$GLOBALS['post'] = $post;
			$galleries       = get_post_galleries( $post->ID, false );
			unset( $GLOBALS['post'] );
		}
		// phpcs:enable WordPress.WP.GlobalVariablesOverride.Prohibited

foreach ( $galleries as $gallery ) {
			if ( isset( $gallery['type'] ) && 'slideshow' === $gallery['type'] && ! empty( $gallery['ids'] ) ) {
				$image_ids  = explode( ',', $gallery['ids'] );
				$image_size = isset( $gallery['size'] ) ? $gallery['size'] : 'thumbnail';
				foreach ( $image_ids as $image_id ) {
					$image = wp_get_attachment_image_src( $image_id, $image_size );
					if ( ! empty( $image[0] ) ) {
						list( $raw_src ) = explode( '?', $image[0] ); // pull off any Query string (?w=250).
						$raw_src         = wp_specialchars_decode( $raw_src ); // rawify it.
						$raw_src         = esc_url_raw( $raw_src ); // clean it.
						$images[]        = array(
							'type' => 'image',
							'from' => 'gallery',
							'src'  => $raw_src,
							'href' => $permalink,
						);
					}
				}
			} elseif ( ! empty( $gallery['src'] ) ) {
				foreach ( $gallery['src'] as $src ) {
					list( $raw_src ) = explode( '?', $src ); // pull off any Query string (?w=250).
					$raw_src         = wp_specialchars_decode( $raw_src ); // rawify it.
					$raw_src         = esc_url_raw( $raw_src ); // clean it.
					$images[]        = array(
						'type' => 'image',
						'from' => 'gallery',
						'src'  => $raw_src,
						'href' => $permalink,
					);
				}
			}
		}

return $images;
	}

/**
	 * Get attachment images for a specified post and return them. Also make sure
	 * their dimensions are at or above a required minimum.
	 *
	 * @param  int $post_id The post ID to check.
	 * @param  int $width Image width.
	 * @param  int $height Image height.
	 * @return array Containing details of the image, or empty array if none.
	 */
	public static function from_attachment( $post_id, $width = 200, $height = 200 ) {
		$images = array();

$post = get_post( $post_id );

if ( ! empty( $post->post_password ) ) {
			return $images;
		}

$post_images = get_posts(
			array(
				'post_parent'      => $post_id,   // Must be children of post.
				'numberposts'      => 5,          // No more than 5.
				'post_type'        => 'attachment', // Must be attachments.
				'post_mime_type'   => 'image', // Must be images.
				'suppress_filters' => false,
			)
		);

if ( ! $post_images ) {
			return $images;
		}

$permalink = get_permalink( $post_id );

foreach ( $post_images as $post_image ) {
			$current_image = self::get_attachment_data( $post_image->ID, $permalink, $width, $height );
			if ( false !== $current_image ) {
				$images[] = $current_image;
			}
		}

/*
		* We only want to pass back attached images that were actually inserted.
		* We can load up all the images found in the HTML source and then
		* compare URLs to see if an image is attached AND inserted.
		*/
		$html_images     = self::from_html( $post_id );
		$inserted_images = array();

foreach ( $html_images as $html_image ) {
			$src = wp_parse_url( $html_image['src'] );
			// strip off any query strings from src.
			if ( ! empty( $src['scheme'] ) && ! empty( $src['host'] ) ) {
				$inserted_images[] = $src['scheme'] . '://' . $src['host'] . $src['path'];
			} elseif ( ! empty( $src['host'] ) ) {
				$inserted_images[] = set_url_scheme( 'http://' . $src['host'] . $src['path'] );
			} else {
				$inserted_images[] = site_url( '/' ) . $src['path'];
			}
		}
		foreach ( $images as $i => $image ) {
			if ( ! in_array( $image['src'], $inserted_images, true ) ) {
				unset( $images[ $i ] );
			}
		}

return $images;
	}

/**
	 * Check if a Featured Image is set for this post, and return it in a similar
	 * format to the other images?_from_*() methods.
	 *
	 * @param  int $post_id The post ID to check.
	 * @param  int $width Image width.
	 * @param  int $height Image height.
	 * @return array containing details of the Featured Image, or empty array if none.
	 */
	public static function from_thumbnail( $post_id, $width = 200, $height = 200 ) {
		$images = array();

$post = get_post( $post_id );

if ( ! empty( $post->post_password ) ) {
			return $images;
		}

if ( 'attachment' === get_post_type( $post ) && wp_attachment_is_image( $post ) ) {
			$thumb = $post_id;
		} else {
			$thumb = get_post_thumbnail_id( $post );
		}

if ( $thumb ) {
			$meta = wp_get_attachment_metadata( $thumb );
			// Must be larger than requested minimums.
			if ( ! isset( $meta['width'] ) || $meta['width'] < $width ) {
				return $images;
			}
			if ( ! isset( $meta['height'] ) || $meta['height'] < $height ) {
				return $images;
			}

$too_big = ( ( ! empty( $meta['width'] ) && $meta['width'] > 1200 ) || ( ! empty( $meta['height'] ) && $meta['height'] > 1200 ) );

if (
				$too_big &&
				(
					( method_exists( 'Jetpack', 'is_module_active' ) && Jetpack::is_module_active( 'photon' ) ) ||
					( defined( 'IS_WPCOM' ) && IS_WPCOM )
				)
			) {
				$img_src = wp_get_attachment_image_src( $thumb, array( 1200, 1200 ) );
			} else {
				$img_src = wp_get_attachment_image_src( $thumb, 'full' );
			}
			if ( ! is_array( $img_src ) ) {
				// If wp_get_attachment_image_src returns false but we know that there should be an image that could be used.
				// we try a bit harder and user the data that we have.
				$thumb_post_data = get_post( $thumb );
				$img_src         = array( $thumb_post_data->guid, $meta['width'], $meta['height'] );
			}

// Let's try to use the postmeta if we can, since it seems to be
			// more reliable
			if ( defined( 'IS_WPCOM' ) && IS_WPCOM ) {
				$featured_image = get_post_meta( $post->ID, '_jetpack_featured_image' );
				if ( $featured_image ) {
					$url = $featured_image[0];
				} else {
					$url = $img_src[0];
				}
			} else {
				$url = $img_src[0];
			}
			$images = array(
				array( // Other methods below all return an array of arrays.
					'type'       => 'image',
					'from'       => 'thumbnail',
					'src'        => $url,
					'src_width'  => $img_src[1],
					'src_height' => $img_src[2],
					'href'       => get_permalink( $thumb ),
					'alt_text'   => self::get_alt_text( $thumb ),
				),
			);

}

if ( empty( $images ) && ( defined( 'IS_WPCOM' ) && IS_WPCOM ) ) {
			$meta_thumbnail = get_post_meta( $post_id, '_jetpack_post_thumbnail', true );
			if ( ! empty( $meta_thumbnail ) ) {
				if ( ! isset( $meta_thumbnail['width'] ) || $meta_thumbnail['width'] < $width ) {
					return $images;
				}

if ( ! isset( $meta_thumbnail['height'] ) || $meta_thumbnail['height'] < $height ) {
					return $images;
				}

$images = array(
					array( // Other methods below all return an array of arrays.
						'type'       => 'image',
						'from'       => 'thumbnail',
						'src'        => $meta_thumbnail['URL'],
						'src_width'  => $meta_thumbnail['width'],
						'src_height' => $meta_thumbnail['height'],
						'href'       => $meta_thumbnail['URL'],
						'alt_text'   => self::get_alt_text( $thumb ),
					),
				);
			}
		}

return $images;
	}

/**
	 * Get images from Gutenberg Image blocks.
	 *
	 * @since 6.9.0
	 *
	 * @param mixed $html_or_id The HTML string to parse for images, or a post id.
	 * @param int   $width      Minimum Image width.
	 * @param int   $height     Minimum Image height.
	 */
	public static function from_blocks( $html_or_id, $width = 200, $height = 200 ) {
		$images = array();

$html_info = self::get_post_html( $html_or_id );

if ( empty( $html_info['html'] ) ) {
			return $images;
		}

// Look for block information in the HTML.
		$blocks = parse_blocks( $html_info['html'] );
		if ( empty( $blocks ) ) {
			return $images;
		}

/*
		 * Let's loop through our blocks.
		 * Some blocks may include some other blocks. Let's go 2 levels deep to look for blocks
		 * that we support and that may include images (see get_images_from_block)
		 *
		 * @to-do: instead of looping manually (that's a lot of if and loops), search recursively instead.
		 */
		foreach ( $blocks as $block ) {
			if ( ! self::is_nested_block( $block ) || 'core/media-text' === $block['blockName'] ) {
				$images = self::get_images_from_block( $images, $block, $html_info, $width, $height );
			} else {
				foreach ( $block['innerBlocks'] as $inner_block ) {
					if ( ! self::is_nested_block( $inner_block ) ) {
						$images = self::get_images_from_block( $images, $inner_block, $html_info, $width, $height );
					} else {
						foreach ( $inner_block['innerBlocks'] as $inner_inner_block ) {
							$images = self::get_images_from_block( $images, $inner_inner_block, $html_info, $width, $height );
						}
					}
				}
			}
		}

/**
		 * Returning a filtered array because get_attachment_data returns false
		 * for unsuccessful attempts.
		 */
		return array_filter( $images );
	}

/**
	 * Very raw -- just parse the HTML and pull out any/all img tags and return their src
	 *
	 * @param mixed $html_or_id The HTML string to parse for images, or a post id.
	 * @param int   $width      Minimum Image width.
	 * @param int   $height     Minimum Image height.
	 *
	 * @uses DOMDocument
	 *
	 * @return array containing images
	 */
	public static function from_html( $html_or_id, $width = 200, $height = 200 ) {
		$images = array();

$html_info = self::get_post_html( $html_or_id );

if ( empty( $html_info['html'] ) ) {
			return $images;
		}

// Do not go any further if DOMDocument is disabled on the server.
		if ( ! class_exists( 'DOMDocument' ) ) {
			return $images;
		}

// Let's grab all image tags from the HTML.
		$dom_doc = new DOMDocument();

// The @ is not enough to suppress errors when dealing with libxml,
		// we have to tell it directly how we want to handle errors.
		libxml_use_internal_errors( true );
		@$dom_doc->loadHTML( $html_info['html'] ); // phpcs:ignore WordPress.PHP.NoSilencedErrors.Discouraged
		libxml_use_internal_errors( false );

$image_tags = $dom_doc->getElementsByTagName( 'img' );

// For each image Tag, make sure it can be added to the $images array, and add it.
		foreach ( $image_tags as $image_tag ) {
			$img_src = $image_tag->getAttribute( 'src' );

if ( empty( $img_src ) ) {
				continue;
			}

// Do not grab smiley images that were automatically created by WP when entering text smilies.
			if ( stripos( $img_src, '/smilies/' ) ) {
				continue;
			}

$meta = array(
				'width'    => (int) $image_tag->getAttribute( 'width' ),
				'height'   => (int) $image_tag->getAttribute( 'height' ),
				'alt_text' => $image_tag->getAttribute( 'alt' ),
			);

/**
			 * Filters the switch to ignore minimum image size requirements. Can be used
			 * to add custom logic to image dimensions, like only enforcing one of the dimensions,
			 * or disabling it entirely.
			 *
			 * @since 6.4.0
			 *
			 * @param bool $ignore Should the image dimensions be ignored?
			 * @param array $meta Array containing image dimensions parsed from the markup.
			 */
			$ignore_dimensions = apply_filters( 'jetpack_postimages_ignore_minimum_dimensions', false, $meta );

// Must be larger than 200x200 (or user-specified).
			if (
				! $ignore_dimensions
				&& (
					empty( $meta['width'] )
					|| empty( $meta['height'] )
					|| $meta['width'] < $width
					|| $meta['height'] < $height
				)
			) {
				continue;
			}

$images[] = array(
				'type'       => 'image',
				'from'       => 'html',
				'src'        => $img_src,
				'src_width'  => $meta['width'],
				'src_height' => $meta['height'],
				'href'       => $html_info['post_url'],
				'alt_text'   => $meta['alt_text'],
			);
		}
		return $images;
	}

/**
	 * Data from blavatar.
	 *
	 * @param    int $post_id The post ID to check.
	 * @param    int $size Size.
	 * @return array containing details of the image, or empty array if none.
	 */
	public static function from_blavatar( $post_id, $size = 96 ) {

$permalink = get_permalink( $post_id );

if ( function_exists( 'blavatar_domain' ) && function_exists( 'blavatar_exists' ) && function_exists( 'blavatar_url' ) ) {
			$domain = blavatar_domain( $permalink );

if ( ! blavatar_exists( $domain ) ) {
				return array();
			}

$url = blavatar_url( $domain, 'img', $size );
		} else {
			$url = get_site_icon_url( $size );
			if ( ! $url ) {
				return array();
			}
		}

return array(
			array(
				'type'       => 'image',
				'from'       => 'blavatar',
				'src'        => $url,
				'src_width'  => $size,
				'src_height' => $size,
				'href'       => $permalink,
				'alt_text'   => '',
			),
		);
	}

/**
	 * Gets a post image from the author avatar.
	 *
	 * @param int    $post_id The post ID to check.
	 * @param int    $size The size of the avatar to get.
	 * @param string $default The default image to use.
	 * @return array containing details of the image, or empty array if none.
	 */
	public static function from_gravatar( $post_id, $size = 96, $default = false ) {
		$post      = get_post( $post_id );
		$permalink = get_permalink( $post_id );

if ( ! $post instanceof WP_Post ) {
			return array();
		}

if ( function_exists( 'wpcom_get_avatar_url' ) ) {
			$url = wpcom_get_avatar_url( $post->post_author, $size, $default, true );
			if ( $url && is_array( $url ) ) {
				$url = $url[0];
			}
		} else {
			$url = get_avatar_url(
				$post->post_author,
				array(
					'size'    => $size,
					'default' => $default,
				)
			);
		}

return array(
			array(
				'type'       => 'image',
				'from'       => 'gravatar',
				'src'        => $url,
				'src_width'  => $size,
				'src_height' => $size,
				'href'       => $permalink,
				'alt_text'   => '',
			),
		);
	}

/**
	 * Run through the different methods that we have available to try to find a single good
	 * display image for this post.
	 *
	 * @param int   $post_id Post ID.
	 * @param array $args Other arguments (currently width and height required for images where possible to determine).
	 * @return array|null containing details of the best image to be used, or null if no image is found.
	 */
	public static function get_image( $post_id, $args = array() ) {
		$image = null;

/**
		 * Fires before we find a single good image for a specific post.
		 *
		 * @since 2.2.0
		 *
		 * @param int $post_id Post ID.
		 */
		do_action( 'jetpack_postimages_pre_get_image', $post_id );
		$media = self::get_images( $post_id, $args );

if ( is_array( $media ) ) {
			foreach ( $media as $item ) {
				if ( 'image' === $item['type'] ) {
					$image = $item;
					break;
				}
			}
		}

/**
		 * Fires after we find a single good image for a specific post.
		 *
		 * @since 2.2.0
		 *
		 * @param int $post_id Post ID.
		 */
		do_action( 'jetpack_postimages_post_get_image', $post_id );

return $image;
	}

/**
	 * Get an array containing a collection of possible images for this post, stopping once we hit a method
	 * that returns something useful.
	 *
	 * @param  int   $post_id Post ID.
	 * @param  array $args Optional args, see defaults list for details.
	 * @return array containing images that would be good for representing this post
	 */
	public static function get_images( $post_id, $args = array() ) {
		// Figure out which image to attach to this post.
		$media = array();

/**
		 * Filters the array of images that would be good for a specific post.
		 * This filter is applied before options ($args) filter the original array.
		 *
		 * @since 2.0.0
		 *
		 * @param array $media Array of images that would be good for a specific post.
		 * @param int $post_id Post ID.
		 * @param array $args Array of options to get images.
		 */
		$media = apply_filters( 'jetpack_images_pre_get_images', $media, $post_id, $args );
		if ( $media ) {
			return $media;
		}

$defaults = array(
			'width'               => 200, // Required minimum width (if possible to determine).
			'height'              => 200, // Required minimum height (if possible to determine).

'fallback_to_avatars' => false, // Optionally include Blavatar and Gravatar (in that order) in the image stack.
			'avatar_size'         => 96, // Used for both Grav and Blav.
			'gravatar_default'    => false, // Default image to use if we end up with no Gravatar.

'from_thumbnail'      => true, // Use these flags to specify which methods to use to find an image.
			'from_slideshow'      => true,
			'from_gallery'        => true,
			'from_attachment'     => true,
			'from_blocks'         => true,
			'from_html'           => true,

'html_content'        => '', // HTML string to pass to from_html().
		);
		$args     = wp_parse_args( $args, $defaults );

$media = array();
		if ( $args['from_thumbnail'] ) {
			$media = self::from_thumbnail( $post_id, $args['width'], $args['height'] );
		}
		if ( ! $media && $args['from_slideshow'] ) {
			$media = self::from_slideshow( $post_id, $args['width'], $args['height'] );
		}
		if ( ! $media && $args['from_gallery'] ) {
			$media = self::from_gallery( $post_id );
		}
		if ( ! $media && $args['from_attachment'] ) {
			$media = self::from_attachment( $post_id, $args['width'], $args['height'] );
		}
		if ( ! $media && $args['from_blocks'] ) {
			if ( empty( $args['html_content'] ) ) {
				$media = self::from_blocks( $post_id, $args['width'], $args['height'] ); // Use the post_id, which will load the content.
			} else {
				$media = self::from_blocks( $args['html_content'], $args['width'], $args['height'] ); // If html_content is provided, use that.
			}
		}
		if ( ! $media && $args['from_html'] ) {
			if ( empty( $args['html_content'] ) ) {
				$media = self::from_html( $post_id, $args['width'], $args['height'] ); // Use the post_id, which will load the content.
			} else {
				$media = self::from_html( $args['html_content'], $args['width'], $args['height'] ); // If html_content is provided, use that.
			}
		}

if ( ! $media && $args['fallback_to_avatars'] ) {
			$media = self::from_blavatar( $post_id, $args['avatar_size'] );
			if ( ! $media ) {
				$media = self::from_gravatar( $post_id, $args['avatar_size'], $args['gravatar_default'] );
			}
		}

/**
		 * Filters the array of images that would be good for a specific post.
		 * This filter is applied after options ($args) filter the original array.
		 *
		 * @since 2.0.0
		 *
		 * @param array $media Array of images that would be good for a specific post.
		 * @param int $post_id Post ID.
		 * @param array $args Array of options to get images.
		 */
		return apply_filters( 'jetpack_images_get_images', $media, $post_id, $args );
	}

/**
	 * Takes an image and base pixel dimensions and returns a srcset for the
	 * resized and cropped images, based on a fixed set of multipliers.
	 *
	 * @param  array $image Array containing details of the image.
	 * @param  int   $base_width Base image width (i.e., the width at 1x).
	 * @param  int   $base_height Base image height (i.e., the height at 1x).
	 * @param  bool  $use_widths Whether to generate the srcset with widths instead of multipliers.
	 * @return string The srcset for the image.
	 */
	public static function generate_cropped_srcset( $image, $base_width, $base_height, $use_widths = false ) {
		$srcset = '';

if ( ! is_array( $image ) || empty( $image['src'] ) || empty( $image['src_width'] ) ) {
			return $srcset;
		}

$multipliers   = array( 1, 1.5, 2, 3, 4 );
		$srcset_values = array();
		foreach ( $multipliers as $multiplier ) {
			$srcset_width  = (int) ( $base_width * $multiplier );
			$srcset_height = (int) ( $base_height * $multiplier );
			if ( $srcset_width < 1 || $srcset_width > $image['src_width'] ) {
				break;
			}

$srcset_url = self::fit_image_url(
				$image['src'],
				$srcset_width,
				$srcset_height
			);

if ( $use_widths ) {
				$srcset_values[] = "{$srcset_url} {$srcset_width}w";
			} else {
				$srcset_values[] = "{$srcset_url} {$multiplier}x";
			}
		}

if ( count( $srcset_values ) > 1 ) {
			$srcset = implode( ', ', $srcset_values );
		}

return $srcset;
	}

/**
	 * Takes an image URL and pixel dimensions then returns a URL for the
	 * resized and cropped image.
	 *
	 * @param  string $src Image URL.
	 * @param  int    $width Image width.
	 * @param  int    $height Image height.
	 * @return string Transformed image URL
	 */
	public static function fit_image_url( $src, $width, $height ) {
		$width  = (int) $width;
		$height = (int) $height;

if ( $width < 1 || $height < 1 ) {
			return $src;
		}

// See if we should bypass WordPress.com SaaS resizing.
		if ( has_filter( 'jetpack_images_fit_image_url_override' ) ) {
			/**
			 * Filters the image URL used after dimensions are set by Photon.
			 *
			 * @since 3.3.0
			 *
			 * @param string $src Image URL.
			 * @param int $width Image width.
			 * @param int $width Image height.
			 */
			return apply_filters( 'jetpack_images_fit_image_url_override', $src, $width, $height );
		}

// If WPCOM hosted image use native transformations.
		$img_host = wp_parse_url( $src, PHP_URL_HOST );
		if ( '.files.wordpress.com' === substr( $img_host, -20 ) ) {
			return add_query_arg(
				array(
					'w'    => $width,
					'h'    => $height,
					'crop' => 1,
				),
				set_url_scheme( $src )
			);
		}

// Use image cdn magic.
		if ( class_exists( Image_CDN_Core::class ) && method_exists( Image_CDN_Core::class, 'cdn_url' ) ) {
			return Image_CDN_Core::cdn_url( $src, array( 'resize' => "$width,$height" ) );
		}

// Arg... no way to resize image using WordPress.com infrastructure!
		return $src;
	}

/**
	 * Get HTML from given post content.
	 *
	 * @since 6.9.0
	 *
	 * @param mixed $html_or_id The HTML string to parse for images, or a post id.
	 *
	 * @return array $html_info {
	 * @type string $html     Post content.
	 * @type string $post_url Post URL.
	 * }
	 */
	public static function get_post_html( $html_or_id ) {
		if ( is_numeric( $html_or_id ) ) {
			$post = get_post( $html_or_id );

if ( empty( $post ) || ! empty( $post->post_password ) ) {
				return '';
			}

$html_info = array(
				'html'     => $post->post_content, // DO NOT apply the_content filters here, it will cause loops.
				'post_url' => get_permalink( $post->ID ),
			);
		} else {
			$html_info = array(
				'html'     => $html_or_id,
				'post_url' => '',
			);
		}
		return $html_info;
	}

/**
	 * Get info about a WordPress attachment.
	 *
	 * @since 6.9.0
	 *
	 * @param int    $attachment_id Attachment ID.
	 * @param string $post_url      URL of the post, if we have one.
	 * @param int    $width         Minimum Image width.
	 * @param int    $height        Minimum Image height.
	 * @return array|bool           Image data or false if unavailable.
	 */
	public static function get_attachment_data( $attachment_id, $post_url, $width, $height ) {
		if ( empty( $attachment_id ) ) {
			return false;
		}

$meta = wp_get_attachment_metadata( $attachment_id );

if ( empty( $meta ) ) {
			return false;
		}

if ( ! empty( $meta['videopress'] ) ) {
			// Use poster image for VideoPress videos.
			$url         = $meta['videopress']['poster'];
			$meta_width  = $meta['videopress']['width'];
			$meta_height = $meta['videopress']['height'];
		} elseif ( ! empty( $meta['thumb'] ) ) {
			// On WordPress.com, VideoPress videos have a 'thumb' property with the
			// poster image filename instead.
			$media_url   = wp_get_attachment_url( $attachment_id );
			$url         = str_replace( wp_basename( $media_url ), $meta['thumb'], $media_url );
			$meta_width  = $meta['width'];
			$meta_height = $meta['height'];
		} elseif ( wp_attachment_is( 'video', $attachment_id ) ) {
			// We don't have thumbnail images for non-VideoPress videos - skip them.
			return false;
		} else {
			if ( ! isset( $meta['width'] ) || ! isset( $meta['height'] ) ) {
				return false;
			}
			$url         = wp_get_attachment_url( $attachment_id );
			$meta_width  = $meta['width'];
			$meta_height = $meta['height'];
		}

if ( $meta_width < $width || $meta_height < $height ) {
			return false;
		}

return array(
			'type'       => 'image',
			'from'       => 'attachment',
			'src'        => $url,
			'src_width'  => $meta_width,
			'src_height' => $meta_height,
			'href'       => $post_url,
			'alt_text'   => self::get_alt_text( $attachment_id ),
		);
	}

/**
	 * Get the alt text for an image or other media from the Media Library.
	 *
	 * @since 7.1
	 *
	 * @param int $attachment_id The Post ID of the media.
	 * @return string The alt text value or an empty string.
	 */
	public static function get_alt_text( $attachment_id ) {
		return (string) get_post_meta( $attachment_id, '_wp_attachment_image_alt', true );
	}

/**
	 * Get an image from a block.
	 *
	 * @since 7.8.0
	 *
	 * @param array $images    Images found.
	 * @param array $block     Block and its attributes.
	 * @param array $html_info Info about the post where the block is found.
	 * @param int   $width     Desired image width.
	 * @param int   $height    Desired image height.
	 *
	 * @return array Array of images found.
	 */
	private static function get_images_from_block( $images, $block, $html_info, $width, $height ) {
		/**
		 * Parse content from Core Image blocks.
		 * If it is an image block for an image hosted on our site, it will have an ID.
		 * If it does not have an ID, let `from_html` parse that content later,
		 * and extract an image if it has size parameters.
		 */
		if (
			'core/image' === $block['blockName']
			&& ! empty( $block['attrs']['id'] )
		) {
			$images[] = self::get_attachment_data( $block['attrs']['id'], $html_info['post_url'], $width, $height );
		} elseif (
			'core/media-text' === $block['blockName']
			&& ! empty( $block['attrs']['mediaId'] )
		) {
			$images[] = self::get_attachment_data( $block['attrs']['mediaId'], $html_info['post_url'], $width, $height );
		} elseif (
			/**
			 * Parse content from Core Gallery blocks as well from Jetpack's Tiled Gallery and Slideshow blocks.
			 * Gallery blocks include the ID of each one of the images in the gallery.
			 */
			in_array( $block['blockName'], array( 'core/gallery', 'jetpack/tiled-gallery', 'jetpack/slideshow' ), true )
			&& ! empty( $block['attrs']['ids'] )
		) {
			foreach ( $block['attrs']['ids'] as $img_id ) {
				$images[] = self::get_attachment_data( $img_id, $html_info['post_url'], $width, $height );
			}
		} elseif (
			/**
			 * Parse content from Jetpack's Story block.
			 */
			'jetpack/story' === $block['blockName']
			&& ! empty( $block['attrs']['mediaFiles'] )
		) {
			foreach ( $block['attrs']['mediaFiles'] as $media_file ) {
				if ( ! empty( $media_file['id'] ) ) {
					$images[] = self::get_attachment_data( $media_file['id'], $html_info['post_url'], $width, $height );
				}
			}
		}

return $images;
	}

/**
	 * Check if a block has inner blocks.
	 *
	 * @since 7.8.0
	 *
	 * @param array $block Block and its attributes.
	 *
	 * @return bool
	 */
	private static function is_nested_block( $block ) {
		if ( ! empty( $block['innerBlocks'] ) ) {
			return true;
		}

return false;
	}
}

Rename File

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