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✏️ Editing: functions.opengraph.php

<?php // phpcs:ignore WordPress.Files.FileName.NotHyphenatedLowercase
/**
 * Open Graph Tags
 *
 * Add Open Graph tags so that Facebook (and any other service that supports them)
 * can crawl the site better and we provide a better sharing experience.
 *
 * @link https://ogp.me/
 * @link https://developers.facebook.com/docs/opengraph/
 *
 * @package automattic/jetpack
 */

use Automattic\Block_Scanner;
use Automattic\Jetpack\Connection\Manager as Connection_Manager;
use Automattic\Jetpack\Current_Plan;
use Automattic\Jetpack\Status\Host;

if ( ! defined( 'ABSPATH' ) ) {
	exit( 0 );
}

add_action( 'wp_head', 'jetpack_og_tags' );
add_action( 'web_stories_story_head', 'jetpack_og_tags' );

// Add a Fediverse Open Graph Tag when an author has connected their Mastodon account.
add_filter( 'jetpack_open_graph_tags', 'jetpack_add_fediverse_creator_open_graph_tag', 10, 1 );
add_filter( 'jetpack_open_graph_output', 'jetpack_filter_fediverse_cards_output', 10, 1 );

/**
 * Outputs Open Graph tags generated by Jetpack.
 */
function jetpack_og_tags() {
	global $post;
	$data = $post; // so that we don't accidentally explode the global.

$is_amp_response = ( class_exists( 'Jetpack_AMP_Support' ) && Jetpack_AMP_Support::is_amp_request() );

// Disable the widont filter on WP.com to avoid stray &nbsps.
	$disable_widont = remove_filter( 'the_title', 'widont' );

$og_output = "\n";
	if ( ! $is_amp_response ) { // Because AMP optimizes the order or the nodes in the head.
		$og_output .= "\n";
	}
	$tags = array();

/**
	 * Filter the minimum width of the images used in Jetpack Open Graph Meta Tags.
	 *
	 * @module sharedaddy, publicize
	 *
	 * @since 2.0.0
	 *
	 * @param int 200 Minimum image width used in Jetpack Open Graph Meta Tags.
	 */
	$image_width = absint( apply_filters( 'jetpack_open_graph_image_width', 200 ) );
	/**
	 * Filter the minimum height of the images used in Jetpack Open Graph Meta Tags.
	 *
	 * @module sharedaddy, publicize
	 *
	 * @since 2.0.0
	 *
	 * @param int 200 Minimum image height used in Jetpack Open Graph Meta Tags.
	 */
	$image_height       = absint( apply_filters( 'jetpack_open_graph_image_height', 200 ) );
	$description_length = 197;

if ( is_home() || is_front_page() ) {
		$site_type              = Jetpack_Options::get_option_and_ensure_autoload( 'open_graph_protocol_site_type', '' );
		$tags['og:type']        = ! empty( $site_type ) ? $site_type : 'website';
		$tags['og:title']       = get_bloginfo( 'name' );
		$tags['og:description'] = get_bloginfo( 'description' );

$front_page_id = get_option( 'page_for_posts' );
		if ( 'page' === get_option( 'show_on_front' ) && $front_page_id && is_home() ) {
			$tags['og:url'] = get_permalink( $front_page_id );
		} else {
			$tags['og:url'] = home_url( '/' );
		}

// Associate a blog's root path with one or more Facebook accounts.
		$facebook_admins = Jetpack_Options::get_option_and_ensure_autoload( 'facebook_admins', array() );
		if ( ! empty( $facebook_admins ) ) {
			$tags['fb:admins'] = $facebook_admins;
		}
	} elseif ( is_author() ) {
		$tags['og:type'] = 'profile';

$author = get_queried_object();

if ( is_a( $author, 'WP_User' ) ) {
			$tags['og:title'] = $author->display_name;
			if ( ! empty( $author->user_url ) ) {
				$tags['og:url'] = $author->user_url;
			} else {
				$tags['og:url'] = get_author_posts_url( $author->ID );
			}
			$tags['og:description']     = $author->description;
			$tags['profile:first_name'] = get_the_author_meta( 'first_name', $author->ID );
			$tags['profile:last_name']  = get_the_author_meta( 'last_name', $author->ID );
		}
	} elseif ( is_archive() ) {
		$tags['og:type']  = 'website';
		$tags['og:title'] = wp_get_document_title();

$archive = get_queried_object();
		if ( $archive instanceof WP_Term ) {
			$tags['og:url']         = get_term_link( $archive->term_id, $archive->taxonomy );
			$tags['og:description'] = $archive->description;
		} elseif ( ! empty( $archive ) && is_post_type_archive() ) {
				$tags['og:url']         = get_post_type_archive_link( $archive->name );
				$tags['og:description'] = $archive->description;
		}
	} elseif ( is_singular() && is_a( $data, 'WP_Post' ) ) {
		$tags['og:type'] = 'article';
		if ( empty( $data->post_title ) ) {
			$tags['og:title'] = ' ';
		} else {
			/** This filter is documented in core/src/wp-includes/post-template.php */
			$tags['og:title'] = wp_kses( apply_filters( 'the_title', $data->post_title, $data->ID ), array() );
		}

$tags['og:url'] = get_permalink( $data->ID );
		if ( ! post_password_required() ) {
			/*
			 * If the post author set an excerpt, use that.
			 * Otherwise, pick the post content that comes before the More tag if there is one.
			 * Do not use the post content if it contains premium content.
			 */
			if ( ! empty( $data->post_excerpt ) ) {
				$tags['og:description'] = jetpack_og_get_description( $data->post_excerpt );
			} elseif ( ! has_block( 'premium-content/container', $data->post_content ) ) {
				$excerpt                = explode( '', $data->post_content )[0];
				$tags['og:description'] = jetpack_og_get_description( $excerpt );
			}
		}

$tags['article:published_time'] = gmdate( 'c', strtotime( $data->post_date_gmt ) );
		$tags['article:modified_time']  = gmdate( 'c', strtotime( $data->post_modified_gmt ) );
		if ( post_type_supports( get_post_type( $data ), 'author' ) && isset( $data->post_author ) ) {
			$publicize_facebook_user = get_post_meta( $data->ID, '_publicize_facebook_user', true );
			if ( ! empty( $publicize_facebook_user ) ) {
				$tags['article:author'] = esc_url( $publicize_facebook_user );
			}
		}
	} elseif ( is_search() ) {
		if ( '' !== get_query_var( 's', '' ) ) {
			$tags['og:title'] = wp_get_document_title();
		}
	}
	/**
	 * Allow plugins to inject additional template-specific Open Graph tags.
	 *
	 * @module sharedaddy, publicize
	 *
	 * @since 3.0.0
	 *
	 * @param array $tags Array of Open Graph Meta tags.
	 * @param array $args Array of image size parameters.
	 */
	$tags = apply_filters( 'jetpack_open_graph_base_tags', $tags, compact( 'image_width', 'image_height' ) );

// Re-enable widont if we had disabled it.
	if ( $disable_widont ) {
		add_filter( 'the_title', 'widont' );
	}

/**
	 * Do not return any Open Graph Meta tags if we don't have any info about a post.
	 *
	 * @module sharedaddy, publicize
	 *
	 * @since 3.0.0
	 *
	 * @param bool true Do not return any Open Graph Meta tags if we don't have any info about a post.
	 */
	if ( empty( $tags ) && apply_filters( 'jetpack_open_graph_return_if_empty', true ) ) {
		return;
	}

$tags['og:site_name'] = get_bloginfo( 'name' );

// Get image info and build tags.
	if ( ! post_password_required() ) {
		$image_info       = jetpack_og_get_image( $image_width, $image_height );
		$tags['og:image'] = $image_info['src'];

if ( ! empty( $image_info['width'] ) ) {
			$tags['og:image:width'] = (int) $image_info['width'];
		}
		if ( ! empty( $image_info['height'] ) ) {
			$tags['og:image:height'] = (int) $image_info['height'];
		}
		// If we have an image, add the alt text even if it's empty.
		if ( ! empty( $image_info['src'] ) && isset( $image_info['alt_text'] ) ) {
			$tags['og:image:alt'] = esc_attr( $image_info['alt_text'] );
		}
	}

// Facebook whines if you give it an empty title.
	if ( empty( $tags['og:title'] ) ) {
		$tags['og:title'] = __( '(no title)', 'jetpack' );
	}

// Shorten the description if it's too long.
	if ( isset( $tags['og:description'] ) ) {
		$tags['og:description'] = strlen( $tags['og:description'] ) > $description_length ? mb_substr( $tags['og:description'], 0, $description_length ) . '…' : $tags['og:description'];
	}

// Try to add OG locale tag if the WP->FB data mapping exists.
	if ( defined( 'JETPACK__GLOTPRESS_LOCALES_PATH' ) && file_exists( JETPACK__GLOTPRESS_LOCALES_PATH ) ) {
		require_once JETPACK__GLOTPRESS_LOCALES_PATH;
		$_locale = get_locale();

// We have to account for w.org vs WP.com locale divergence.
		if ( defined( 'IS_WPCOM' ) && IS_WPCOM ) {
			$gp_locale = GP_Locales::by_field( 'slug', $_locale );
		} else {
			$gp_locale = GP_Locales::by_field( 'wp_locale', $_locale );
		}
	}

if ( isset( $gp_locale->facebook_locale ) && ! empty( $gp_locale->facebook_locale ) ) {
		$tags['og:locale'] = $gp_locale->facebook_locale;
	}

/**
	 * Allow the addition of additional Open Graph Meta tags, or modify the existing tags.
	 *
	 * @module sharedaddy, publicize
	 *
	 * @since 2.0.0
	 *
	 * @param array $tags Array of Open Graph Meta tags.
	 * @param array $args Array of image size parameters.
	 */
	$tags = apply_filters( 'jetpack_open_graph_tags', $tags, compact( 'image_width', 'image_height' ) );

// secure_urls need to go right after each og:image to work properly so we will abstract them here.
	$tags['og:image:secure_url'] = ( empty( $tags['og:image:secure_url'] ) ) ? '' : $tags['og:image:secure_url'];
	$secure                      = $tags['og:image:secure_url'];
	unset( $tags['og:image:secure_url'] );
	$secure_image_num = 0;

$allowed_empty_tags = array(
		'og:image:alt',
	);

foreach ( (array) $tags as $tag_property => $tag_content ) {
		// to accommodate multiple images.
		$tag_content = (array) $tag_content;
		$tag_content = array_unique( array_filter( $tag_content, 'is_scalar' ) );

foreach ( $tag_content as $tag_content_single ) {
			if ( empty( $tag_content_single ) && ! in_array( $tag_property, $allowed_empty_tags, true ) ) {
				continue; // Only allow certain empty tags.
			}

switch ( $tag_property ) {
				case 'og:url':
				case 'og:image':
				case 'og:image:url':
				case 'og:image:secure_url':
				case 'og:audio':
				case 'og:audio:url':
				case 'og:audio:secure_url':
				case 'og:video':
				case 'og:video:url':
				case 'og:video:secure_url':
					$og_tag = sprintf( '<meta property="%s" content="%s" />', esc_attr( $tag_property ), esc_url( $tag_content_single ) );
					break;
				default:
					$og_tag = sprintf( '<meta property="%s" content="%s" />', esc_attr( $tag_property ), esc_attr( $tag_content_single ) );
			}
			/**
			 * Filter the HTML Output of each Open Graph Meta tag.
			 *
			 * @module sharedaddy, publicize
			 *
			 * @since 2.0.0
			 *
			 * @param string $og_tag HTML HTML Output of each Open Graph Meta tag.
			 */
			$og_output .= apply_filters( 'jetpack_open_graph_output', $og_tag );
			$og_output .= "\n";

if ( 'og:image' === $tag_property ) {
				if ( is_array( $secure ) && ! empty( $secure[ $secure_image_num ] ) ) {
					$og_tag = sprintf( '<meta property="og:image:secure_url" content="%s" />', esc_url( $secure[ $secure_image_num ] ) );
					/** This filter is documented in functions.opengraph.php */
					$og_output .= apply_filters( 'jetpack_open_graph_output', $og_tag );
					$og_output .= "\n";
				} elseif ( ! is_array( $secure ) && ! empty( $secure ) ) {
					$og_tag = sprintf( '<meta property="og:image:secure_url" content="%s" />', esc_url( $secure ) );
					/** This filter is documented in functions.opengraph.php */
					$og_output .= apply_filters( 'jetpack_open_graph_output', $og_tag );
					$og_output .= "\n";
				}
				++$secure_image_num;
			}
		}
	}

if ( ! $is_amp_response ) { // Because AMP optimizes the order or the nodes in the head.
		$og_output .= "\n";
	}
	$og_output .= "\n";
	// This is trusted output or added by a filter.
	echo $og_output; // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped
}

/**
 * Returns an image used in social shares.
 *
 * @since 2.0.0
 *
 * @param int  $width Minimum width for the image. Default is 200 based on Facebook's requirement.
 * @param int  $height Minimum height for the image. Default is 200 based on Facebook's requirement.
 * @param null $deprecated Deprecated.
 *
 * @return array The source ('src'), 'width', and 'height' of the image.
 */
function jetpack_og_get_image( $width = 200, $height = 200, $deprecated = null ) {
	if ( ! empty( $deprecated ) ) {
		_deprecated_argument( __FUNCTION__, 'jetpack-6.6.0' );
	}
	$image = array();

if ( is_singular() && ! is_home() ) {
		// Grab obvious image if post is an attachment page for an image.
		if ( is_attachment( get_the_ID() ) && str_starts_with( get_post_mime_type(), 'image' ) ) {
			$image['src']      = wp_get_attachment_url( get_the_ID() );
			$image['alt_text'] = Jetpack_PostImages::get_alt_text( get_the_ID() );
		}

// Attempt to find something good for this post using our generalized PostImages code.
		if ( empty( $image ) && class_exists( 'Jetpack_PostImages' ) ) {
			$post_image = Jetpack_PostImages::get_image(
				get_the_ID(),
				array(
					'width'  => $width,
					'height' => $height,
				)
			);
			if ( ! empty( $post_image ) && is_array( $post_image ) ) {
				$image['src'] = $post_image['src'];
				if ( isset( $post_image['src_width'] ) && isset( $post_image['src_height'] ) ) {
					$image['width']  = $post_image['src_width'];
					$image['height'] = $post_image['src_height'];
				}
				if ( ! empty( $post_image['alt_text'] ) ) {
					$image['alt_text'] = $post_image['alt_text'];
				}
			}
		}
	} elseif ( is_author() ) {
		$author = get_queried_object();
		if ( is_a( $author, 'WP_User' ) ) {
			$image['src']          = get_avatar_url(
				$author->user_email,
				array(
					'size' => $width,
				)
			);
				$image['alt_text'] = $author->display_name;
		}
	}

/*
	 * Generate a fallback social image,
	 * dynamically generated based on the site name,
	 * a representative image of the site,
	 * and a custom template used by our Social Image Generator.
	 */
	if ( empty( $image ) ) {
		$site_image = jetpack_og_get_fallback_social_image( $width, $height );
		if ( ! empty( $site_image ) ) {
			$image['src']    = $site_image['src'];
			$image['width']  = $site_image['width'];
			$image['height'] = $site_image['height'];
		}
	}

// If we didn't get an explicit alt tag from the image, set a default.
	if ( empty( $image['alt_text'] ) ) {
		/**
		 * Filter the default Open Graph image alt text, used when the Open Graph image from the post does not have an alt text.
		 *
		 * @since 10.4
		 *
		 * @param string $str Default Open Graph image alt text.
		 */
		$image['alt_text'] = apply_filters( 'jetpack_open_graph_image_default_alt_text', '' );
	}

return $image;
}

/**
 * Get a fallback social image for the site.
 *
 * @since 14.9
 *
 * @param int $width The width of the image.
 * @param int $height The height of the image.
 *
 * @return array The source ('src'), 'width', 'height', and source type of the image.
 */
function jetpack_og_get_fallback_social_image( $width, $height ) {
	// Default template.
	$template = 'edge';

// Let's get the site's representative image.
	$site_image = jetpack_og_get_site_image( $width, $height );

/**
	 * Define your own site's representative image,
	 * to override any fallback image found by looking through site's logo, site icon, and blavatar.
	 * This will allow you to overwrite the default fallback image generated dynamically.
	 *
	 * @since 15.0
	 *
	 * @param array $site_image Your own site's representative image.
	 * @param array $site_image The site's representative image picked by Jetpack. {
	 *     @type string $src    The source of the image.
	 *     @type int    $width  The width of the image.
	 *     @type int    $height The height of the image.
	 *     @type string $type   The type of the image.
	 * }
	 */
	$custom_site_image = apply_filters( 'jetpack_og_default_site_image', array(), $site_image );
	if ( ! empty( $custom_site_image['src'] ) ) {
		return $custom_site_image;
	}

if ( empty( $site_image['src'] ) ) {
		// When using the default blank image, use a different template in Social Image Generator.
		$template          = 'highway';
		$site_image['src'] = jetpack_og_get_site_fallback_blank_image();
	}

/*
	 * Only attempt to generate a dynamic fallback image
	 * if we have a healthy connection to WPCOM.
	 * and if the site has the right plan.
	 */
	if (
		( ( new Host() )->is_wpcom_simple()
		|| ( new Connection_Manager() )->is_connected()
		)
		&& Current_Plan::supports( 'social-image-generator' )
	) {
		/**
		 * Allow filtering the template to use with Social Image Generator.
		 * Available templates: highway, dois, fullscreen, edge.
		 *
		 * @since 14.9
		 *
		 * @param string $template The template to use.
		 */
		$template = apply_filters( 'jetpack_og_fallback_social_image_template', $template );

// Let's generate the image.
		$site_image = jetpack_og_generate_fallback_social_image( $site_image, $template );
	}

return $site_image;
}

/**
 * Get the site's representative image.
 *
 * @since 14.9
 *
 * @param int $width The width of the image.
 * @param int $height The height of the image.
 *
 * @return array The source ('src'), 'width', 'height', and source type of the image.
 */
function jetpack_og_get_site_image( $width, $height ) {
	// First fall back, blavatar.
	if ( function_exists( 'blavatar_domain' ) ) {
		$blavatar_domain = blavatar_domain( site_url() );
		if ( blavatar_exists( $blavatar_domain ) ) {
			return array(
				'src'    => blavatar_url( $blavatar_domain, 'img', $width, false, true ),
				'width'  => $width,
				'height' => $height,
				'type'   => 'blavatar',
			);
		}
	}

// Second fall back, Site Logo.
	if (
		function_exists( 'jetpack_has_site_logo' )
		&& jetpack_has_site_logo()
	) {
		$image_id = jetpack_get_site_logo( 'id' );
		$logo     = wp_get_attachment_image_src( $image_id, 'full' );
		if (
			isset( $logo[0] ) && isset( $logo[1] ) && isset( $logo[2] )
			&& ( _jetpack_og_get_image_validate_size( $logo[1], $logo[2], $width, $height ) )
		) {
			return array(
				'src'    => $logo[0],
				'width'  => $logo[1],
				'height' => $logo[2],
				'type'   => 'site_logo',
			);
		}
	}

// Third fall back, Core's site logo.
	if ( has_custom_logo() ) {
		$custom_logo_id = get_theme_mod( 'custom_logo' );
		$sl_details     = wp_get_attachment_image_src(
			$custom_logo_id,
			'full'
		);
		if (
			isset( $sl_details[0] ) && isset( $sl_details[1] ) && isset( $sl_details[2] )
			&& ( _jetpack_og_get_image_validate_size( $sl_details[1], $sl_details[2], $width, $height ) )
		) {
			return array(
				'src'      => $sl_details[0],
				'width'    => $sl_details[1],
				'height'   => $sl_details[2],
				'alt_text' => Jetpack_PostImages::get_alt_text( $custom_logo_id ),
			);
		}
	}

// Fourth fall back, Core Site Icon, if valid in size.
	if ( has_site_icon() ) {
		$image_id = get_option( 'site_icon' );
		$icon     = wp_get_attachment_image_src( $image_id, 'full' );
		if (
			isset( $icon[0] ) && isset( $icon[1] ) && isset( $icon[2] )
			&& ( _jetpack_og_get_image_validate_size( $icon[1], $icon[2], $width, $height ) )
		) {
			return array(
				'src'    => $icon[0],
				'width'  => $icon[1],
				'height' => $icon[2],
				'type'   => 'site_icon',
			);
		}
	}

return array(
		'src'    => '',
		'width'  => $width,
		'height' => $height,
		'type'   => 'blank',
	);
}

/**
 * Get the site's fallback image.
 *
 * @since 14.9
 *
 * @return string
 */
function jetpack_og_get_site_fallback_blank_image() {
	/**
	 * Filter the default Open Graph Image tag, used when no Image can be found in a post.
	 *
	 * @since 3.0.0
	 *
	 * @param string $str Default Image URL.
	 */
	return apply_filters( 'jetpack_open_graph_image_default', 'https://s0.wp.com/i/blank.jpg' );
}

/**
 * Get available templates for Social Image Generator.
 *
 * @since 14.9
 *
 * @return array The available templates.
 */
function jetpack_og_get_available_templates() {
	if ( ! class_exists( '\Automattic\Jetpack\Publicize\Social_Image_Generator\Templates' ) ) {
		return array();
	}

return \Automattic\Jetpack\Publicize\Social_Image_Generator\Templates::TEMPLATES;
}

/**
 * Get a social image token from Social Image Generator.
 *
 * @since 14.9
 *
 * @param string $site_title The site title.
 * @param string $image_url The image URL.
 * @param string $template The template to use.
 *
 * @return string|WP_Error The social image token, or a WP_Error if the token could not be generated.
 */
function jetpack_og_get_social_image_token( $site_title, $image_url, $template ) {
	// Let's check if we have a cached token.
	$cache_key      = wp_hash( $site_title . $image_url . $template );
	$transient_name = 'jetpack_og_social_image_token_' . $cache_key;
	$cached_token   = get_transient( $transient_name );

if ( ! empty( $cached_token ) ) {
		return $cached_token;
	}

/**
	 * Filter the social image token for testing purposes.
	 *
	 * @since 14.9
	 *
	 * @param string|WP_Error|null $token The token to return, or null to use default behavior.
	 */
	$token = apply_filters( 'jetpack_og_get_social_image_token', null );
	if ( null !== $token ) {
		return $token;
	}

if ( ! function_exists( '\Automattic\Jetpack\Publicize\Social_Image_Generator\fetch_token' ) ) {
		return new WP_Error( 'jetpack_og_get_social_image_token_error', __( 'Social Image Generator is not available.', 'jetpack' ) );
	}

$token = \Automattic\Jetpack\Publicize\Social_Image_Generator\fetch_token( $site_title, $image_url, $template );

/*
	 * We want to cache 2 types of responses:
	 * - Successful responses with a token.
	 * - WP_Error responses that denote a WordPress.com connection issue.
	 */
	if (
		! is_wp_error( $token )
		|| (
			is_wp_error( $token )
			&& 'invalid_user_permission_publicize' === $token->get_error_code()
		)
	) {
		set_transient( $transient_name, $token, DAY_IN_SECONDS );
	}

return $token;
}

/**
 * Generate and create a fallback social image.
 *
 * @since 14.9
 *
 * @param array  $representative_image The representative image of the site.
 * @param string $template The template to use.
 *
 * @return array The source ('src'), 'width', and 'height' of the image.
 */
function jetpack_og_generate_fallback_social_image( $representative_image, $template ) {
	$site_title     = get_bloginfo( 'name' );
	$fallback_image = array(
		'src'    => $representative_image['src'],
		'width'  => $representative_image['width'],
		'height' => $representative_image['height'],
	);

// Ensure that we use a valid template.
	if (
		! in_array(
			$template,
			jetpack_og_get_available_templates(),
			true
		)
	) {
		$template = 'edge';
	}

// Let's generate the token matching the image..
	$token = jetpack_og_get_social_image_token( $site_title, $representative_image['src'], $template );

if ( is_wp_error( $token ) ) {
		return $fallback_image;
	}

// Build the image URL and return it.
	return array(
		'src'    => sprintf(
			'https://s0.wp.com/_si/?t=%s',
			$token
		),
		'width'  => 1200,
		'height' => 630,
	);
}

/**
 * Validate the width and height against required width and height
 *
 * @param int $width      Width of the image.
 * @param int $height     Height of the image.
 * @param int $req_width  Required width to pass validation.
 * @param int $req_height Required height to pass validation.
 *
 * @return bool - True if the image passed the required size validation
 */
function _jetpack_og_get_image_validate_size( $width, $height, $req_width, $req_height ) {
	if ( ! $width || ! $height ) {
		return false;
	}

$valid_width         = ( $width >= $req_width );
	$valid_height        = ( $height >= $req_height );
	$is_image_acceptable = $valid_width && $valid_height;

return $is_image_acceptable;
}

/**
 * Gets a gravatar URL of the specified size.
 *
 * @param string $email E-mail address to get gravatar for.
 * @param int    $width Size of returned gravatar.
 * @return array|bool|mixed|string
 */
function jetpack_og_get_image_gravatar( $email, $width ) {
	return get_avatar_url(
		$email,
		array(
			'size' => $width,
		)
	);
}

/**
 * Clean up text meant to be used as Description Open Graph tag.
 *
 * There should be:
 * - no links
 * - no shortcodes
 * - no html tags or their contents
 * - no content within wp:query blocks
 * - not too many words.
 *
 * @param string       $description Text coming from WordPress (autogenerated or manually generated by author).
 * @param WP_Post|null $data        Information about our post.
 *
 * @return string $description Cleaned up description string.
 */
function jetpack_og_get_description( $description = '', $data = null ) {
	// Remove content within wp:query blocks.
	$description = jetpack_og_remove_query_blocks( $description );

// Remove tags such as <style or <script.
	$description = wp_strip_all_tags( $description );

/*
	 * Clean up any plain text entities left into formatted entities.
	 * Intentionally not using a filter to prevent pollution.
	 * @see https://github.com/Automattic/jetpack/pull/2899#issuecomment-151957382
	 */
	$description = wp_kses(
		trim(
			convert_chars(
				wptexturize( $description )
			)
		),
		array()
	);

// Remove shortcodes.
	$description = strip_shortcodes( $description );

// Remove links.
	$description = preg_replace(
		'@https?://[\S]+@',
		'',
		$description
	);

/*
	 * Limit things to a small text blurb.
	 * There isn't a hard limit set by Facebook, so let's rely on WP's own limit.
	 * (55 words or the localized equivalent).
	 * This limit can be customized with the wp_trim_words filter.
	 */
	$description = wp_trim_words( $description );

// Let's set a default if we have no text by now.
	if ( empty( $description ) ) {
		/**
		 * Filter the fallback `og:description` used when no excerpt information is provided.
		 *
		 * @module sharedaddy, publicize
		 *
		 * @since 3.9.0
		 *
		 * @param string $var  Fallback og:description. Default is translated `Visit the post for more'.
		 * @param object $data Post object for the current post.
		 */
		$description = apply_filters(
			'jetpack_open_graph_fallback_description',
			__( 'Visit the post for more.', 'jetpack' ),
			$data
		);
	}

return $description;
}

/**
 * Remove content within wp:query blocks from the description.
 *
 * @since 14.9
 *
 * @param string $description The description text that may contain block markup.
 * @return string The description with wp:query blocks removed.
 */
function jetpack_og_remove_query_blocks( $description ) {
	// Handle non-string input
	if ( ! is_string( $description ) ) {
		return '';
	}

$output         = '';
	$offset         = 0;
	$depth          = 0;
	$in_query_block = false;

$scanner = Block_Scanner::create( $description );
	if ( ! $scanner ) {
		return $description;
	}

while ( $scanner->next_delimiter() ) {
		$span     = $scanner->get_span();
		$match_at = $span->start;
		$length   = $span->length;

// Check if this is a query block.
		if ( $scanner->is_block_type( 'query' ) ) {
			switch ( $scanner->get_delimiter_type() ) {
				case Block_Scanner::OPENER:
					if ( ! $in_query_block ) {
						// Copy content before the query block.
						$output        .= substr( $description, $offset, $match_at - $offset );
						$in_query_block = true;
					}
					++$depth;
					break;

case Block_Scanner::CLOSER:
					--$depth;
					if ( $in_query_block && $depth === 0 ) {
						// We've exited the query block, continue from after it.
						$in_query_block = false;
						$offset         = $match_at + $length;

// Remove extra newline if present
						if (
							str_starts_with( substr( $description, $offset ), "\n" )
							&& str_ends_with( $output, "\n" )
						) {
							++$offset;
						}
					}
					break;

case Block_Scanner::VOID:
					// Void query blocks should be removed entirely.
					if ( ! $in_query_block ) {
						$output .= substr( $description, $offset, $match_at - $offset );
						$offset  = $match_at + $length;
						// Remove extra newline if present
						if (
							str_starts_with( substr( $description, $offset ), "\n" )
							&& str_ends_with( $output, "\n" )
						) {
							++$offset;
						}
					}
					break;
			}
		} elseif ( ! $in_query_block ) {
			// Not a query block, copy content including the delimiter if we're not inside a query block.
			$output .= substr( $description, $offset, $match_at - $offset + $length );
			$offset  = $match_at + $length;
		}
	}

// Add any remaining content after the last delimiter.
	if ( ! $in_query_block ) {
		$output .= substr( $description, $offset );
	}

return $output;
}

/**
 * Display a Fediverse actor Open Graph tag when the post author has a Mastodon connection.
 *
 * @see https://blog.joinmastodon.org/2024/07/highlighting-journalism-on-mastodon/
 *
 * @since 13.8
 *
 * @param array $tags Current tags.
 *
 * @return array
 */
function jetpack_add_fediverse_creator_open_graph_tag( $tags ) {
	/*
	 * Let's not do this on WordPress.com Simple for now,
	 * because of its performance impact.
	 * See p1723574138779019/1723572983.803009-slack-C01U2KGS2PQ
	 */
	if ( ( new Host() )->is_wpcom_simple() ) {
		return $tags;
	}

// Let's not add any tags when the ActivityPub plugin already adds its own.
	$is_activitypub_opengraph_integration_active = get_option( 'activitypub_use_opengraph' );
	if ( $is_activitypub_opengraph_integration_active ) {
		return $tags;
	}

// We pull the Mastodon connection data from Publicize.
	if ( ! function_exists( 'publicize_init' ) ) {
		return $tags;
	}
	$publicize = publicize_init();

global $post;
	if (
		! is_singular()
		|| ! $post instanceof WP_Post
		|| ! isset( $post->ID )
		|| empty( $post->post_author )
	) {
		return $tags;
	}

$post_mastodon_connections = array();

// Loop through active connections.
	foreach ( (array) $publicize->get_services( 'connected' ) as $service_name => $connections ) {
		if ( 'mastodon' !== $service_name ) {
			continue;
		}

// services can have multiple connections. Store them all in our array.
		foreach ( $connections as $connection ) {
			$connection_id   = $publicize->get_connection_id( $connection );
			$connection_meta = $publicize->get_connection_meta( $connection );

$connection_data    = $connection_meta['connection_data'] ?? array();
			$mastodon_handle    = $connection_meta['external_display'] ?? '';
			$connection_user_id = $connection_data['user_id'] ?? 0;

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

// Did we skip this connection for this post?
			if ( get_post_meta( $post->ID, $publicize->POST_SKIP_PUBLICIZE . $connection_id, true ) ) { // phpcs:ignore WordPress.NamingConventions.ValidVariableName.UsedPropertyNotSnakeCase
				continue;
			}

$post_mastodon_connections[] = array(
				'user_id'       => (int) $connection_user_id,
				'connection_id' => (int) $connection_id,
				'handle'        => $mastodon_handle,
				'global'        => 0 === (int) $connection_user_id,
			);
		}
	}

// If we have no Mastodon connections, skip.
	if ( empty( $post_mastodon_connections ) ) {
		return $tags;
	}

/*
	 * Select a single Mastodon connection to use.
	 * It should be either the first connection belonging to the post author,
	 * or the first global connection.
	 */
	foreach ( $post_mastodon_connections as $mastodon_connection ) {
		if ( (int) $post->post_author === $mastodon_connection['user_id'] ) {
			$tags['fediverse:creator'] = esc_attr( $mastodon_connection['handle'] );
			break;
		}

if ( $mastodon_connection['global'] ) {
			$tags['fediverse:creator'] = esc_attr( $mastodon_connection['handle'] );
			break;
		}
	}

return $tags;
}

/**
 * Update the markup for the Open Graph tag to match the expected output for Mastodon
 * (name instead of property).
 *
 * @since 13.8
 *
 * @param string $og_tag A single OG tag.
 *
 * @return string Result of the OG tag.
 */
function jetpack_filter_fediverse_cards_output( $og_tag ) {
	return ( str_contains( $og_tag, 'fediverse:' ) ) ? preg_replace( '/property="([^"]+)"/', 'name="\1"', $og_tag ) : $og_tag;
}

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