[OBSOLETE] Hacks to turn off or adapt Jetpack features in AMP

amp-jetpack-hacks.php

<?php
/**
 * Plugin Name: Jetpack Hacks for AMP
 * Description: Temporary workarounds to get Jetpack features to play nice with AMP theme support.
 * Plugin URI: https://gist.github.com/westonruter/034e15dd7bfd011a9c73c96df86aa291
 * Author: Weston Ruter, XWP
 * Author URI: https://make.xwp.co
 *
 * @package AMP_Jetpack_Hacks
 */

namespace AMP_Jetpack_Hacks;

/**
 * Returns whether Jetpack is active.
 *
 * @param string $module Module to check active.
 * @return bool Whether active.
 */
function is_jetpack_active( $module = null ) {
	if ( ! class_exists( 'Jetpack' ) ) {
		return false;
	}
	if ( ! \Jetpack::is_active() ) {
		return false;
	}
	if ( $module ) {
		return \Jetpack::is_module_active( $module );
	}
	return true;
}

/**
 * Whether is AMP in theme support.
 *
 * @return bool Is Amplified.
 */
function is_amp() {
	if ( ! function_exists( 'is_amp_endpoint' ) ) {
		return false;
	}
	return current_theme_supports( 'amp' ) && \is_amp_endpoint();
}

// Disable Comment Likes since not available in AMP.
add_action( 'template_redirect', function() {
	if ( ! is_jetpack_active( 'comment-likes' ) || ! is_amp() ) {
		return;
	}
	$module = \Jetpack_Comment_Likes::init();

	remove_filter( 'sharing_show', '__return_false', 100 ); // See <https://github.com/Automattic/amp-wp/pull/1125>.

	// Undo \Jetpack_Comment_Likes::frontend_init().
	remove_action( 'wp_enqueue_scripts', array( $module, 'load_styles_register_scripts' ) );
	remove_filter( 'comment_text', array( $module, 'comment_likes' ) );
} );

// Disable Likes since not available in AMP.
add_action( 'template_redirect', function() {
	if ( ! is_jetpack_active( 'likes' ) || ! is_amp() ) {
		return;
	}
	$module = \Jetpack_Likes::init();

	// Undo \Jetpack_Likes::action_init().
	remove_filter( 'the_content', array( $module, 'post_likes' ), 30 );
	remove_filter( 'the_excerpt', array( $module, 'post_likes' ), 30 );
	remove_filter( 'post_flair', array( $module, 'post_likes' ), 30 );
	remove_filter( 'post_flair_block_css', array( $module, 'post_flair_service_enabled_like' ) );
	wp_dequeue_script( 'postmessage' );
	wp_dequeue_script( 'jetpack_resize' );
	wp_dequeue_script( 'jetpack_likes_queuehandler' );
	wp_dequeue_style( 'jetpack_likes' );
} );

// Disable Related Posts since not available in AMP.
add_action( 'wp', function() {
	if ( ! is_amp() ) {
		return;
	}
	add_filter( 'jetpack_relatedposts_filter_enabled_for_request', '__return_false' );
} );

// Override social sharing for AMP.
add_action( 'template_redirect', function() {
	if ( ! is_amp() ) {
		return;
	}
	remove_action( 'wp_head', 'sharing_add_header', 1 );

	if ( ! is_jetpack_active( 'sharedaddy' ) ) {
		return;
	}

	add_filter( 'sharing_maybe_enqueue_scripts', '__return_false' );
	add_filter( 'jetpack_sharing_counts', '__return_false' );
	add_filter( 'sharing_js', '__return_false' );

	$sharing_enabled = null;
	add_filter( 'sharing_enabled', function( $enabled ) use ( &$sharing_enabled ) {
		$sharing_enabled = $enabled;
		return $enabled;
	} );

	add_filter( 'jetpack_sharing_display_markup', function( $markup ) use ( &$sharing_enabled ) {
		remove_action( 'wp_footer', 'sharing_add_footer' );
		if ( empty( $sharing_enabled ) ) {
			return $markup;
		}

		$supported_services = array(
			'facebook'      => array(
				/** This filter is documented in modules/sharedaddy/sharing-sources.php */
				'data-param-app_id' => apply_filters( 'jetpack_sharing_facebook_app_id', '249643311490' ),
			),
			'twitter'       => array(),
			'pinterest'     => array(),
			'whatsapp'      => array(),
			'google-plus-1' => array(
				'type' => 'gplus',
			),
			'tumblr'        => array(),
			'linkedin'      => array(),
		);

		$sharing_links = array();
		foreach ( $sharing_enabled['visible'] as $id => $service ) {
			if ( ! isset( $supported_services[ $id ] ) ) {
				$sharing_links[] = "<!-- not supported: $id -->";
				continue;
			}

			$args = array_merge(
				array(
					'type' => $id,
				),
				$supported_services[ $id ]
			);

			$sharing_link = '<amp-social-share';
			foreach ( $args as $key => $value ) {
				$sharing_link .= sprintf( ' %s="%s"', sanitize_key( $key ), esc_attr( $value ) );
			}
			$sharing_link .= '></amp-social-share>';

			$sharing_links[] = $sharing_link;
		}

		return preg_replace( '#(?<=<div class="sd-content">).+?(?=</div>)#s', implode( '', $sharing_links ), $markup );
	} );
} );

// Disable Jetpack Carousel in AMP.
add_action( 'template_redirect', function() {
	if ( ! is_jetpack_active( 'carousel' ) || ! is_amp() ) {
		return;
	}

	// This needed because the instantiated Jetpack_Carousel is not stored in a variable.
	global $wp_filter;
	$carousel_object = null;
	if ( ! isset( $wp_filter['post_gallery'] ) || ! isset( $wp_filter['post_gallery']->callbacks[-1000] ) ) {
		return;
	}
	$callback = current( $wp_filter['post_gallery']->callbacks[-1000] );
	if ( ! isset( $callback['function'] ) || ! is_array( $callback['function'] ) || get_class( $callback['function'][0] ) !== 'Jetpack_Carousel' ) {
		return;
	}
	$carousel_object = $callback['function'][0];

	$hooks_to_remove = array(
		'post_gallery' => array(
			'check_if_shortcode_processed_and_enqueue_assets' => 1000,
			'set_in_gallery' => -1000,
		),
		'gallery_style' => array(
			'add_data_to_container' => 10,
		),
		'wp_get_attachment_image_attributes' => array(
			'add_data_to_images' => 10,
		),
		'the_content' => array(
			'add_data_img_tags_and_enqueue_assets' => 10,
		),
	);
	foreach ( $hooks_to_remove as $hook => $callbacks ) {
		foreach ( $callbacks as $method => $priority ) {
			remove_filter( $hook, array( $carousel_object, $method ), $priority );
		}
	}
} );

// Disable devicepx.
add_action( 'template_redirect', function() {
	if ( is_amp() && class_exists( 'Jetpack' ) ) {
		remove_action( 'wp_enqueue_scripts', array( \Jetpack::init(), 'devicepx' ) );
	}
}, 9 );

// Disable photon.
add_action( 'template_redirect', function() {
	if ( is_amp() && class_exists( 'Jetpack_Photon' ) ) {
		remove_action( 'wp_enqueue_scripts', array( \Jetpack_Photon::instance(), 'action_wp_enqueue_scripts' ), 9 );
	}
}, 9 );

// Disable notifications.
add_action( 'template_redirect', function() {
	if ( is_amp() && is_jetpack_active( 'notes' ) ) {
		remove_action( 'wp_head', array( \Jetpack_Notifications::init(), 'styles_and_scripts'), 120 );
	}
}, 9 );

// Disable milestone widget.
add_action( 'template_redirect', function() {
	if ( ! is_amp() ) {
		return;
	}
	remove_action( 'wp_enqueue_scripts', array( 'Milestone_Widget', 'enqueue_template' ) );
	remove_action( 'wp_head', array( 'Milestone_Widget', 'styles_template' ) );
}, 9 );

// Force using separate stylesheets to avoid unnecessary tree shaking.
add_filter( 'jetpack_implode_frontend_css', function( $implode ) {
	if ( is_amp() ) {
		$implode = false;
	}
	return $implode;
} );

This will be superceded by Automattic/jetpack#9458