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| Current File : //opt/wp/plugins/jetpack/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
*/
/**
* 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;
}
/**
* 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;
}
$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'] );
}
$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 ( 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 containing details of the best image to be used
*/
public static function get_image( $post_id, $args = array() ) {
$image = '';
/**
* 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.
$media = false;
/**
* Filters the array of images that would be good for a specific post.
* This filter is applied before options ($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 = false;
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 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 Photon magic.
if ( function_exists( 'jetpack_photon_url' ) ) {
return jetpack_photon_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;
}
}