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<?php //phpcs:ignore WordPress.Files.FileName.InvalidClassFileName
use Automattic\Jetpack\Assets;
use Automattic\Jetpack\Stats\Tracking_Pixel as Stats_Tracking_Pixel;
use Automattic\Jetpack\Sync\Functions;
/**
* Manages compatibility with the amp-wp plugin
*
* @see https://github.com/Automattic/amp-wp
*/
class Jetpack_AMP_Support {
/**
* Apply custom AMP changes on the front-end.
*/
public static function init() {
// Add Stats tracking pixel on Jetpack sites when the Stats module is active.
if (
Jetpack::is_module_active( 'stats' )
&& ! ( defined( 'IS_WPCOM' ) && IS_WPCOM )
) {
add_action( 'amp_post_template_footer', array( 'Jetpack_AMP_Support', 'add_stats_pixel' ) );
}
/**
* Remove this during the init hook in case users have enabled it during
* the after_setup_theme hook, which triggers before init.
*/
remove_theme_support( 'jetpack-devicepx' );
// Sharing.
add_filter( 'jetpack_sharing_display_markup', array( 'Jetpack_AMP_Support', 'render_sharing_html' ), 10, 2 );
add_filter( 'sharing_enqueue_scripts', array( 'Jetpack_AMP_Support', 'amp_disable_sharedaddy_css' ) );
add_action( 'wp_enqueue_scripts', array( 'Jetpack_AMP_Support', 'amp_enqueue_sharing_css' ) );
// Sharing for Reader mode.
if ( function_exists( 'jetpack_social_menu_include_svg_icons' ) ) {
add_action( 'amp_post_template_footer', 'jetpack_social_menu_include_svg_icons' );
}
add_action( 'amp_post_template_css', array( 'Jetpack_AMP_Support', 'amp_reader_sharing_css' ), 10, 0 );
// enforce freedom mode for videopress.
add_filter( 'videopress_shortcode_options', array( 'Jetpack_AMP_Support', 'videopress_enable_freedom_mode' ) );
// include Jetpack og tags when rendering native AMP head.
add_action( 'amp_post_template_head', array( 'Jetpack_AMP_Support', 'amp_post_jetpack_og_tags' ) );
// Post rendering changes for legacy AMP.
add_action( 'pre_amp_render_post', array( 'Jetpack_AMP_Support', 'amp_disable_the_content_filters' ) );
// Disable Comment Likes.
add_filter( 'jetpack_comment_likes_enabled', array( 'Jetpack_AMP_Support', 'comment_likes_enabled' ) );
// Transitional mode AMP should not have comment likes.
add_filter( 'the_content', array( 'Jetpack_AMP_Support', 'disable_comment_likes_before_the_content' ) );
// Remove the Likes button from the admin bar.
add_filter( 'jetpack_admin_bar_likes_enabled', array( 'Jetpack_AMP_Support', 'disable_likes_admin_bar' ) );
// Add post template metadata for legacy AMP.
add_filter( 'amp_post_template_metadata', array( 'Jetpack_AMP_Support', 'amp_post_template_metadata' ), 10, 2 );
// Filter photon image args for AMP Stories.
add_filter( 'jetpack_photon_post_image_args', array( 'Jetpack_AMP_Support', 'filter_photon_post_image_args_for_stories' ), 10, 2 );
// Sync the amp-options.
add_filter( 'jetpack_options_whitelist', array( 'Jetpack_AMP_Support', 'filter_jetpack_options_safelist' ) );
}
/**
* Disable the Comment Likes feature on AMP views.
*
* @param bool $enabled Should comment likes be enabled.
*/
public static function comment_likes_enabled( $enabled ) {
return $enabled && ! self::is_amp_request();
}
/**
* Apply custom AMP changes in wp-admin.
*/
public static function admin_init() {
// disable Likes metabox for post editor if AMP canonical disabled.
add_filter( 'post_flair_disable', array( 'Jetpack_AMP_Support', 'is_amp_canonical' ), 99 );
}
/**
* Is the page in AMP 'canonical mode'.
* Used when themes register support for AMP with `add_theme_support( 'amp' )`.
*
* @return bool is_amp_canonical
*/
public static function is_amp_canonical() {
return function_exists( 'amp_is_canonical' ) && amp_is_canonical();
}
/**
* Is AMP available for this request
* This returns false for admin, CLI requests etc.
*
* @return bool is_amp_available
*/
public static function is_amp_available() {
return ( function_exists( 'amp_is_available' ) && amp_is_available() );
}
/**
* Does the page return AMP content.
*
* @return bool $is_amp_request Are we on am AMP view.
*/
public static function is_amp_request() {
$is_amp_request = ( function_exists( 'is_amp_endpoint' ) && is_amp_endpoint() );
/**
* Returns true if the current request should return valid AMP content.
*
* @since 6.2.0
*
* @param boolean $is_amp_request Is this request supposed to return valid AMP content?
*/
return apply_filters( 'jetpack_is_amp_request', $is_amp_request );
}
/**
* Determines whether the legacy AMP post templates are being used.
*
* @since 10.6.0
*
* @return bool
*/
public static function is_amp_legacy() {
return ( function_exists( 'amp_is_legacy' ) && amp_is_legacy() );
}
/**
* Remove content filters added by Jetpack.
*/
public static function amp_disable_the_content_filters() {
if ( defined( 'IS_WPCOM' ) && IS_WPCOM ) {
add_filter( 'protected_embeds_use_form_post', '__return_false' );
remove_filter( 'the_title', 'widont' );
}
remove_filter( 'pre_kses', array( 'Filter_Embedded_HTML_Objects', 'filter' ), 11 );
remove_filter( 'pre_kses', array( 'Filter_Embedded_HTML_Objects', 'maybe_create_links' ), 100 );
}
/**
* Do not add comment likes on AMP requests.
*
* @param string $content Post content.
*/
public static function disable_comment_likes_before_the_content( $content ) {
if ( self::is_amp_request() ) {
remove_filter( 'comment_text', 'comment_like_button', 12, 2 );
}
return $content;
}
/**
* Do not display the Likes' Admin bar on AMP requests.
*
* @param bool $is_admin_bar_button_visible Should the Like button be visible in the Admin bar. Default to true.
*/
public static function disable_likes_admin_bar( $is_admin_bar_button_visible ) {
if ( self::is_amp_request() ) {
return false;
}
return $is_admin_bar_button_visible;
}
/**
* Add Jetpack stats pixel.
*
* @since 6.2.1
*/
public static function add_stats_pixel() {
if ( ! has_action( 'wp_footer', array( Stats_Tracking_Pixel::class, 'add_amp_pixel' ) ) ) {
return;
}
$stats_data = Stats_Tracking_Pixel::build_view_data();
Stats_Tracking_Pixel::render_amp_footer( $stats_data );
}
/**
* Add publisher and image metadata to legacy AMP post.
*
* @since 6.2.0
*
* @param array $metadata Metadata array.
* @param WP_Post $post Post.
* @return array Modified metadata array.
*/
public static function amp_post_template_metadata( $metadata, $post ) {
if ( isset( $metadata['publisher'] ) && ! isset( $metadata['publisher']['logo'] ) ) {
$metadata = self::add_site_icon_to_metadata( $metadata );
}
if ( ! isset( $metadata['image'] ) && ! empty( $post ) ) {
$metadata = self::add_image_to_metadata( $metadata, $post );
}
return $metadata;
}
/**
* Add blavatar to legacy AMP post metadata.
*
* @since 6.2.0
*
* @param array $metadata Metadata.
*
* @return array Metadata.
*/
private static function add_site_icon_to_metadata( $metadata ) {
$size = 60;
$site_icon_url = class_exists( 'Automattic\\Jetpack\\Sync\\Functions' ) ? Functions::site_icon_url( $size ) : '';
if ( function_exists( 'blavatar_domain' ) ) {
$metadata['publisher']['logo'] = array(
'@type' => 'ImageObject',
'url' => blavatar_url( blavatar_domain( site_url() ), 'img', $size, self::staticize_subdomain( 'https://wordpress.com/i/favicons/apple-touch-icon-60x60.png' ) ),
'width' => $size,
'height' => $size,
);
} elseif ( $site_icon_url ) {
$metadata['publisher']['logo'] = array(
'@type' => 'ImageObject',
'url' => $site_icon_url,
'width' => $size,
'height' => $size,
);
}
return $metadata;
}
/**
* Add image to legacy AMP post metadata.
*
* @since 6.2.0
*
* @param array $metadata Metadata.
* @param WP_Post $post Post.
* @return array Metadata.
*/
private static function add_image_to_metadata( $metadata, $post ) {
$image = Jetpack_PostImages::get_image(
$post->ID,
array(
'fallback_to_avatars' => true,
'avatar_size' => 200,
// AMP already attempts these.
'from_thumbnail' => false,
'from_attachment' => false,
)
);
if ( empty( $image ) ) {
return self::add_fallback_image_to_metadata( $metadata );
}
if ( ! isset( $image['src_width'] ) ) {
$dimensions = self::extract_image_dimensions_from_getimagesize(
array(
$image['src'] => false,
)
);
if ( false !== $dimensions[ $image['src'] ] ) {
$image['src_width'] = $dimensions['width'];
$image['src_height'] = $dimensions['height'];
}
}
$metadata['image'] = array(
'@type' => 'ImageObject',
'url' => $image['src'],
);
if ( isset( $image['src_width'] ) ) {
$metadata['image']['width'] = $image['src_width'];
}
if ( isset( $image['src_width'] ) ) {
$metadata['image']['height'] = $image['src_height'];
}
return $metadata;
}
/**
* Add fallback image to legacy AMP post metadata.
*
* @since 6.2.0
*
* @param array $metadata Metadata.
* @return array Metadata.
*/
private static function add_fallback_image_to_metadata( $metadata ) {
/** This filter is documented in functions.opengraph.php */
$default_image = apply_filters( 'jetpack_open_graph_image_default', 'https://wordpress.com/i/blank.jpg' );
$metadata['image'] = array(
'@type' => 'ImageObject',
'url' => self::staticize_subdomain( $default_image ),
'width' => 200,
'height' => 200,
);
return $metadata;
}
/**
* Return static WordPress.com domain to use to load resources from WordPress.com.
*
* @param string $domain Asset URL.
*/
private static function staticize_subdomain( $domain ) {
// deal with WPCOM vs Jetpack.
if ( function_exists( 'staticize_subdomain' ) ) {
return staticize_subdomain( $domain );
} else {
return Assets::staticize_subdomain( $domain );
}
}
/**
* Extract image dimensions via wpcom/imagesize, only on WPCOM
*
* @since 6.2.0
*
* @param array $dimensions Dimensions.
* @return array Dimensions.
*/
private static function extract_image_dimensions_from_getimagesize( $dimensions ) {
if ( ! ( defined( 'IS_WPCOM' ) && IS_WPCOM && function_exists( 'require_lib' ) ) ) {
return $dimensions;
}
require_lib( 'wpcom/imagesize' );
foreach ( $dimensions as $url => $value ) {
if ( is_array( $value ) ) {
continue;
}
$result = wpcom_getimagesize( $url );
if ( is_array( $result ) ) {
$dimensions[ $url ] = array(
'width' => $result[0],
'height' => $result[1],
);
}
}
return $dimensions;
}
/**
* Display Open Graph Meta tags in AMP views.
*/
public static function amp_post_jetpack_og_tags() {
if ( ! ( defined( 'IS_WPCOM' ) && IS_WPCOM ) ) {
Jetpack::init()->check_open_graph();
}
if ( function_exists( 'jetpack_og_tags' ) ) {
jetpack_og_tags();
}
}
/**
* Force Freedom mode in VideoPress.
*
* @param array $options Array of VideoPress shortcode options.
*/
public static function videopress_enable_freedom_mode( $options ) {
if ( self::is_amp_request() ) {
$options['freedom'] = true;
}
return $options;
}
/**
* Display custom markup for the sharing buttons when in an AMP view.
*
* @param string $markup Content markup of the Jetpack sharing links.
* @param array $sharing_enabled Array of Sharing Services currently enabled.
*/
public static function render_sharing_html( $markup, $sharing_enabled ) {
global $post;
if ( empty( $post ) ) {
return '';
}
if ( ! self::is_amp_request() ) {
return $markup;
}
remove_action( 'wp_footer', 'sharing_add_footer' );
if ( empty( $sharing_enabled ) ) {
return $markup;
}
$sharing_links = array();
foreach ( $sharing_enabled['visible'] as $service ) {
$sharing_link = $service->get_amp_display( $post );
if ( ! empty( $sharing_link ) ) {
$sharing_links[] = $sharing_link;
}
}
// Replace the existing unordered list with AMP sharing buttons.
$markup = preg_replace( '#<ul>(.+)</ul>#', implode( '', $sharing_links ), $markup );
// Remove any lingering share-end list items.
$markup = str_replace( '<li class="share-end"></li>', '', $markup );
return $markup;
}
/**
* Tells Jetpack not to enqueue CSS for share buttons.
*
* @param bool $enqueue Whether or not to enqueue.
* @return bool Whether or not to enqueue.
*/
public static function amp_disable_sharedaddy_css( $enqueue ) {
if ( self::is_amp_request() ) {
$enqueue = false;
}
return $enqueue;
}
/**
* Enqueues the AMP specific sharing styles for the sharing icons.
*/
public static function amp_enqueue_sharing_css() {
if (
Jetpack::is_module_active( 'sharedaddy' )
&& self::is_amp_request()
&& ! self::is_amp_legacy()
) {
wp_enqueue_style( 'sharedaddy-amp', plugin_dir_url( __DIR__ ) . 'modules/sharedaddy/amp-sharing.css', array( 'social-logos' ), JETPACK__VERSION );
}
}
/**
* For the AMP Reader mode template, include styles that we need.
*/
public static function amp_reader_sharing_css() {
// If sharing is not enabled, we should not proceed to render the CSS.
if ( ! defined( 'JETPACK_SOCIAL_LOGOS_DIR' ) || ! defined( 'JETPACK_SOCIAL_LOGOS_URL' ) || ! defined( 'WP_SHARING_PLUGIN_DIR' ) ) {
return;
}
/*
* We'll need to output the full contents of the 2 files
* in the head on AMP views. We can't rely on regular enqueues here.
* @todo As of AMP plugin v1.5, you can actually rely on regular enqueues thanks to https://github.com/ampproject/amp-wp/pull/4299. Once WPCOM upgrades AMP, then this method can be eliminated.
*
* phpcs:disable WordPress.WP.AlternativeFunctions.file_get_contents_file_get_contents
* phpcs:disable WordPress.Security.EscapeOutput.OutputNotEscaped
*/
$css = file_get_contents( JETPACK_SOCIAL_LOGOS_DIR . 'social-logos.css' );
$css = preg_replace( '#(?<=url\(")(?=social-logos\.)#', JETPACK_SOCIAL_LOGOS_URL, $css ); // Make sure font files get their absolute paths.
echo $css;
echo file_get_contents( WP_SHARING_PLUGIN_DIR . 'amp-sharing.css' );
/*
* phpcs:enable WordPress.WP.AlternativeFunctions.file_get_contents_file_get_contents
* phpcs:enable WordPress.Security.EscapeOutput.OutputNotEscaped
*/
}
/**
* Ensure proper Photon image dimensions for AMP Stories.
*
* @param array $args Array of Photon Arguments.
* @param array $details {
* Array of image details.
*
* @type string $tag Image tag (Image HTML output).
* @type string $src Image URL.
* @type string $src_orig Original Image URL.
* @type int|false $width Image width.
* @type int|false $height Image height.
* @type int|false $width_orig Original image width before constrained by content_width.
* @type int|false $height_orig Original Image height before constrained by content_width.
* @type string $transform_orig Original transform before constrained by content_width.
* }
* @return array Args.
*/
public static function filter_photon_post_image_args_for_stories( $args, $details ) {
if ( ! is_singular( 'amp_story' ) ) {
return $args;
}
// Percentage-based dimensions are not allowed in AMP, so this shouldn't happen, but short-circuit just in case.
if ( str_contains( $details['width_orig'], '%' ) || str_contains( $details['height_orig'], '%' ) ) {
return $args;
}
$max_height = 1280; // See image size with the slug \AMP_Story_Post_Type::MAX_IMAGE_SIZE_SLUG.
$transform = $details['transform_orig'];
$width = $details['width_orig'];
$height = $details['height_orig'];
// If height is available, constrain to $max_height.
if ( false !== $height ) {
if ( $height > $max_height && false !== $height ) {
$width = ( $max_height * $width ) / $height;
$height = $max_height;
} elseif ( $height > $max_height ) {
$height = $max_height;
}
}
/*
* Set a height if none is found.
* If height is set in this manner and height is available, use `fit` instead of `resize` to prevent skewing.
*/
if ( false === $height ) {
$height = $max_height;
if ( false !== $width ) {
$transform = 'fit';
}
}
// Build array of Photon args and expose to filter before passing to Photon URL function.
$args = array();
if ( false !== $width && false !== $height ) {
$args[ $transform ] = $width . ',' . $height;
} elseif ( false !== $width ) {
$args['w'] = $width;
} elseif ( false !== $height ) {
$args['h'] = $height;
}
return $args;
}
/**
* Adds amp-options to the list of options to sync, if AMP is available
*
* @param array $options_safelist Safelist of options to sync.
*
* @return array Updated options safelist
*/
public static function filter_jetpack_options_safelist( $options_safelist ) {
if ( function_exists( 'is_amp_endpoint' ) ) {
$options_safelist[] = 'amp-options';
}
return $options_safelist;
}
}