<?php // phpcs:ignore WordPress.Files.FileName.InvalidClassFileName

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/**

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* Useful for finding an image to display alongside/in representation of a specific post.

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*

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* @package automattic/jetpack

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*/

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use Automattic\Block_Scanner;

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use Automattic\Jetpack\Image_CDN\Image_CDN_Core;

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/**

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* Useful for finding an image to display alongside/in representation of a specific post.

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*

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* Includes a few different methods, all of which return a similar-format array containing

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* details of any images found. Everything can (should) be called statically, it's just a

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* function-bucket. You can also call Jetpack_PostImages::get_image() to cycle through all of the methods until

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* one of them finds something useful.

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*

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* This file is included verbatim in Jetpack

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*/

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class Jetpack_PostImages {

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/**

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* If a slideshow is embedded within a post, then parse out the images involved and return them

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*

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* @param int $post_id Post ID.

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* @param int $width Image width.

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* @param int $height Image height.

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* @return array Images.

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*/

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public static function from_slideshow( $post_id, $width = 200, $height = 200 ) {

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$images = array();

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$post = get_post( $post_id );

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if ( ! $post ) {

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return $images;

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}

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if ( ! empty( $post->post_password ) ) {

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return $images;

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}

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if ( false === has_shortcode( $post->post_content, 'slideshow' ) ) {

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return $images; // no slideshow - bail.

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}

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

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// Mechanic: Somebody set us up the bomb.

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$old_post = $GLOBALS['post'] ?? null;

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$GLOBALS['post'] = $post; // phpcs:ignore WordPress.WP.GlobalVariablesOverride.Prohibited

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$old_shortcodes = $GLOBALS['shortcode_tags'];

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$GLOBALS['shortcode_tags'] = array( 'slideshow' => $old_shortcodes['slideshow'] ); // phpcs:ignore WordPress.WP.GlobalVariablesOverride.Prohibited

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// Find all the slideshows.

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

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

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foreach ( $slideshow_matches as $slideshow_match ) {

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$slideshow = do_shortcode_tag( $slideshow_match );

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$pos = stripos( $slideshow, 'jetpack-slideshow' );

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if ( false === $pos ) { // must be something wrong - or we changed the output format in which case none of the following will work.

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continue;

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}

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$start = strpos( $slideshow, '[', $pos );

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$end = strpos( $slideshow, ']', $start );

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$post_images = json_decode( wp_specialchars_decode( str_replace( "'", '"', substr( $slideshow, $start, $end - $start + 1 ) ), ENT_QUOTES ) ); // parse via JSON

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// If the JSON didn't decode don't try and act on it.

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if ( is_array( $post_images ) ) {

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foreach ( $post_images as $post_image ) {

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$post_image_id = absint( $post_image->id );

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if ( ! $post_image_id ) {

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continue;

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}

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$meta = wp_get_attachment_metadata( $post_image_id );

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// Must be larger than 200x200 (or user-specified).

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if ( ! isset( $meta['width'] ) || $meta['width'] < $width ) {

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continue;

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}

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if ( ! isset( $meta['height'] ) || $meta['height'] < $height ) {

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continue;

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}

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$url = wp_get_attachment_url( $post_image_id );

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$images[] = array(

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'type' => 'image',

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'from' => 'slideshow',

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'src' => $url,

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'src_width' => $meta['width'],

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'src_height' => $meta['height'],

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'href' => $permalink,

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);

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}

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}

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}

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ob_end_clean();

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// Operator: Main screen turn on.

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$GLOBALS['shortcode_tags'] = $old_shortcodes; // phpcs:ignore WordPress.WP.GlobalVariablesOverride.Prohibited

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$GLOBALS['post'] = $old_post; // phpcs:ignore WordPress.WP.GlobalVariablesOverride.Prohibited

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return $images;

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}

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/**

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* Filtering out images with broken URL from galleries.

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*

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* @param array $galleries Galleries.

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* @return array $filtered_galleries

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*/

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public static function filter_gallery_urls( $galleries ) {

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$filtered_galleries = array();

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foreach ( $galleries as $this_gallery ) {

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if ( ! isset( $this_gallery['src'] ) ) {

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continue;

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}

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$ids = isset( $this_gallery['ids'] ) ? explode( ',', $this_gallery['ids'] ) : array();

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// Make sure 'src' array isn't associative and has no holes.

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$this_gallery['src'] = array_values( $this_gallery['src'] );

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foreach ( $this_gallery['src'] as $idx => $src_url ) {

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if ( filter_var( $src_url, FILTER_VALIDATE_URL, FILTER_FLAG_PATH_REQUIRED ) === false ) {

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unset( $this_gallery['src'][ $idx ] );

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unset( $ids[ $idx ] );

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}

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}

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if ( isset( $this_gallery['ids'] ) ) {

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$this_gallery['ids'] = implode( ',', $ids );

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}

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// Remove any holes we introduced.

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$this_gallery['src'] = array_values( $this_gallery['src'] );

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$filtered_galleries[] = $this_gallery;

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}

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return $filtered_galleries;

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}

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/**

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* If a gallery is detected, then get all the images from it.

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*

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* @param int $post_id Post ID.

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* @param int $width Minimum image width to consider.

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* @param int $height Minimum image height to consider.

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* @return array Images.

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*/

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public static function from_gallery( $post_id, $width = 200, $height = 200 ) {

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$images = array();

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$post = get_post( $post_id );

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if ( ! $post ) {

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return $images;

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}

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if ( ! empty( $post->post_password ) ) {

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return $images;

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}

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add_filter( 'get_post_galleries', array( __CLASS__, 'filter_gallery_urls' ), 999999 );

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

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/**

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* Juggle global post object because the gallery shortcode uses the

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* global object.

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*

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* See core ticket:

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* https://core.trac.wordpress.org/ticket/39304

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*/

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// phpcs:disable WordPress.WP.GlobalVariablesOverride.Prohibited

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if ( isset( $GLOBALS['post'] ) ) {

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$juggle_post = $GLOBALS['post'];

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$GLOBALS['post'] = $post;

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$galleries = get_post_galleries( $post->ID, false );

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$GLOBALS['post'] = $juggle_post;

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} else {

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$GLOBALS['post'] = $post;

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$galleries = get_post_galleries( $post->ID, false );

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unset( $GLOBALS['post'] );

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}

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// phpcs:enable WordPress.WP.GlobalVariablesOverride.Prohibited

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foreach ( $galleries as $gallery ) {

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if ( ! empty( $gallery['ids'] ) ) {

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$image_ids = explode( ',', $gallery['ids'] );

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$image_size = isset( $gallery['size'] ) ? $gallery['size'] : 'thumbnail';

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foreach ( $image_ids as $image_id ) {

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$image = wp_get_attachment_image_src( $image_id, $image_size );

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$meta = wp_get_attachment_metadata( $image_id );

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if ( isset( $gallery['type'] ) && 'slideshow' === $gallery['type'] ) {

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// Must be larger than 200x200 (or user-specified).

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if ( ! isset( $meta['width'] ) || $meta['width'] < $width ) {

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continue;

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}

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if ( ! isset( $meta['height'] ) || $meta['height'] < $height ) {

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continue;

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}

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}

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if ( ! empty( $image[0] ) ) {

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list( $raw_src ) = explode( '?', $image[0] ); // pull off any Query string (?w=250).

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$raw_src = wp_specialchars_decode( $raw_src ); // rawify it.

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$raw_src = esc_url_raw( $raw_src ); // clean it.

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$images[] = array(

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'type' => 'image',

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'from' => 'gallery',

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'src' => $raw_src,

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'src_width' => $meta['width'] ?? 0,

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'src_height' => $meta['height'] ?? 0,

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'href' => $permalink,

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'alt_text' => self::get_alt_text( $image_id ),

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);

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}

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}

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} elseif ( ! empty( $gallery['src'] ) ) {

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foreach ( $gallery['src'] as $src ) {

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list( $raw_src ) = explode( '?', $src ); // pull off any Query string (?w=250).

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$raw_src = wp_specialchars_decode( $raw_src ); // rawify it.

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$raw_src = esc_url_raw( $raw_src ); // clean it.

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$images[] = array(

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'type' => 'image',

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'from' => 'gallery',

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'src' => $raw_src,

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'href' => $permalink,

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);

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}

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}

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}

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return $images;

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}

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/**

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* Get attachment images for a specified post and return them. Also make sure

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* their dimensions are at or above a required minimum.

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*

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* @param int $post_id The post ID to check.

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* @param int $width Image width.

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* @param int $height Image height.

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* @return array Containing details of the image, or empty array if none.

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*/

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public static function from_attachment( $post_id, $width = 200, $height = 200 ) {

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$images = array();

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$post = get_post( $post_id );

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if ( ! empty( $post->post_password ) ) {

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return $images;

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}

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$post_images = get_posts(

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array(

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'post_parent' => $post_id, // Must be children of post.

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'numberposts' => 5, // No more than 5.

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'post_type' => 'attachment', // Must be attachments.

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'post_mime_type' => 'image', // Must be images.

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'suppress_filters' => false,

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)

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);

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if ( ! $post_images ) {

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return $images;

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}

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$permalink = get_permalink( $post_id );

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foreach ( $post_images as $post_image ) {

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$current_image = self::get_attachment_data( $post_image->ID, $permalink, $width, $height );

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if ( false !== $current_image ) {

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$images[] = $current_image;

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}

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}

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/*

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* We only want to pass back attached images that were actually inserted.

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* We can load up all the images found in the HTML source and then

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* compare URLs to see if an image is attached AND inserted.

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*/

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$html_images = self::from_html( $post_id );

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$inserted_images = array();

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foreach ( $html_images as $html_image ) {

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$src = wp_parse_url( $html_image['src'] );

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if ( ! $src || empty( $src['path'] ) ) {

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continue;

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}

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// strip off any query strings from src.

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if ( ! empty( $src['scheme'] ) && ! empty( $src['host'] ) ) {

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$inserted_images[] = $src['scheme'] . '://' . $src['host'] . $src['path'];

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} elseif ( ! empty( $src['host'] ) ) {

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$inserted_images[] = set_url_scheme( 'http://' . $src['host'] . $src['path'] );

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} else {

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$inserted_images[] = site_url( '/' ) . $src['path'];

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}

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}

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foreach ( $images as $i => $image ) {

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if ( ! in_array( $image['src'], $inserted_images, true ) ) {

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unset( $images[ $i ] );

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}

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}

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return $images;

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}

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/**

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* Check if a Featured Image is set for this post, and return it in a similar

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* format to the other images?_from_*() methods.

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*

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* @param int $post_id The post ID to check.

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* @param int $width Image width.

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* @param int $height Image height.

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* @return array containing details of the Featured Image, or empty array if none.

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*/

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public static function from_thumbnail( $post_id, $width = 200, $height = 200 ) {

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$images = array();

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$post = get_post( $post_id );

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if ( ! empty( $post->post_password ) ) {

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return $images;

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}

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if ( 'attachment' === get_post_type( $post ) && wp_attachment_is_image( $post ) ) {

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$thumb = $post_id;

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} else {

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$thumb = get_post_thumbnail_id( $post );

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}

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if ( $thumb ) {

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$meta = wp_get_attachment_metadata( $thumb );

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// Must be larger than requested minimums.

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if ( ! isset( $meta['width'] ) || $meta['width'] < $width ) {

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return $images;

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}

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if ( ! isset( $meta['height'] ) || $meta['height'] < $height ) {

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return $images;

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}

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$max_dimension = self::get_max_thumbnail_dimension();

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

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if (

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$too_big &&

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(

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( method_exists( 'Jetpack', 'is_module_active' ) && Jetpack::is_module_active( 'photon' ) ) ||

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( defined( 'IS_WPCOM' ) && IS_WPCOM )

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)

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) {

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$size = self::determine_thumbnail_size_for_photon( $meta['width'], $meta['height'] );

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$photon_args = array(

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'fit' => $size['width'] . ',' . $size['height'],

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);

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$img_src = array( Image_CDN_Core::cdn_url( wp_get_attachment_url( $thumb ), $photon_args ), $size['width'], $size['height'], true ); // Match the signature of wp_get_attachment_image_src

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} else {

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$img_src = wp_get_attachment_image_src( $thumb, 'full' );

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}

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if ( ! is_array( $img_src ) ) {

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// If wp_get_attachment_image_src returns false but we know that there should be an image that could be used.

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// we try a bit harder and user the data that we have.

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$thumb_post_data = get_post( $thumb );

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$img_src = array( $thumb_post_data->guid ?? null, $meta['width'], $meta['height'] );

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}

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// Let's try to use the postmeta if we can, since it seems to be

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// more reliable

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if ( defined( 'IS_WPCOM' ) && IS_WPCOM ) {

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$featured_image = get_post_meta( $post->ID, '_jetpack_featured_image' );

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if ( $featured_image ) {

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$url = $featured_image[0];

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} else {

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$url = $img_src[0];

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}

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} else {

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$url = $img_src[0];

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}

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$images = array(

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array( // Other methods below all return an array of arrays.

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'type' => 'image',

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'from' => 'thumbnail',

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'src' => $url,

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'src_width' => $img_src[1],

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'src_height' => $img_src[2],

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'href' => get_permalink( $thumb ),

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'alt_text' => self::get_alt_text( $thumb ),

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),

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);

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}

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if ( empty( $images ) && ( defined( 'IS_WPCOM' ) && IS_WPCOM ) ) {

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$meta_thumbnail = get_post_meta( $post_id, '_jetpack_post_thumbnail', true );

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if ( ! empty( $meta_thumbnail ) ) {

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if ( ! isset( $meta_thumbnail['width'] ) || $meta_thumbnail['width'] < $width ) {

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return $images;

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}

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if ( ! isset( $meta_thumbnail['height'] ) || $meta_thumbnail['height'] < $height ) {

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return $images;

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}

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$images = array(

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array( // Other methods below all return an array of arrays.

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'type' => 'image',

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'from' => 'thumbnail',

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'src' => $meta_thumbnail['URL'],

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'src_width' => $meta_thumbnail['width'],

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'src_height' => $meta_thumbnail['height'],

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'href' => $meta_thumbnail['URL'],

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'alt_text' => self::get_alt_text( $thumb ),

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),

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);

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}

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}

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return $images;

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}

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/**

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* Get images from Gutenberg Image blocks.

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*

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* @since 6.9.0

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* @since 14.8 Updated to use Block_Delimiter for improved performance.

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* @since 14.9 Updated to use Block_Scanner for improved performance.

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*

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* @param mixed $html_or_id The HTML string to parse for images, or a post id.

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* @param int $width Minimum Image width.

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* @param int $height Minimum Image height.

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*/

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public static function from_blocks( $html_or_id, $width = 200, $height = 200 ) {

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$images = array();

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

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if ( empty( $html_info['html'] ) ) {

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return $images;

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}

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$scanner = Block_Scanner::create( $html_info['html'] );

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if ( ! $scanner ) {

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return $images;

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}

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/*

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* Use Block_Scanner to parse our post content HTML,

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* and find all the block delimiters for supported blocks,

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* whether they're parent or nested blocks.

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*/

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$supported_blocks = array(

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'core/image',

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'core/media-text',

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'core/gallery',

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'jetpack/tiled-gallery',

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'jetpack/slideshow',

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'jetpack/story',

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);

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while ( $scanner->next_delimiter() ) {

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$type = $scanner->get_delimiter_type();

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// Only process opening delimiters for supported block types.

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if ( Block_Scanner::OPENER !== $type ) {

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continue;

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}

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$block_type = $scanner->get_block_type();

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$is_supported_block = in_array( $block_type, $supported_blocks, true );

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if ( ! $is_supported_block ) {

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continue;

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}

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$attributes = $scanner->allocate_and_return_parsed_attributes() ?? array();

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$block_images = self::get_images_from_block_attributes( $block_type, $attributes, $html_info, $width, $height );

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if ( ! empty( $block_images ) ) {

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$images = array_merge( $images, $block_images );

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}

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}

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/**

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* Returning a filtered array because get_attachment_data returns false

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* for unsuccessful attempts.

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*/

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return array_filter( $images );

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}

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/**

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* Extract images from block attributes based on block type.

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*

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* @since 14.8

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*

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* @param string $block_type Block type name.

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* @param array $attributes Block attributes.

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* @param array $html_info Info about the post where the block is found.

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* @param int $width Desired image width.

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* @param int $height Desired image height.

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*

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* @return array Array of images found.

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*/

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