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<?php
/**
* Class PairedBrowsing.
*
* @package AmpProject\AmpWP
*/
namespace AmpProject\AmpWP\Admin;
use AMP_Options_Manager;
use AMP_Theme_Support;
use AMP_Validation_Manager;
use AMP_Validated_URL_Post_Type;
use AmpProject\AmpWP\Infrastructure\Conditional;
use AmpProject\AmpWP\Infrastructure\Delayed;
use AmpProject\AmpWP\Infrastructure\HasRequirements;
use AmpProject\AmpWP\Infrastructure\Registerable;
use AmpProject\AmpWP\Infrastructure\Service;
use AmpProject\AmpWP\Option;
use AmpProject\AmpWP\PairedRouting;
use AmpProject\AmpWP\QueryVar;
use AmpProject\AmpWP\Services;
use AmpProject\DevMode;
use WP_Post;
use WP_Admin_Bar;
use AmpProject\AmpWP\DevTools\UserAccess;
/**
* Managing the paired browsing app.
*
* @since 2.1
* @internal
*/
final class PairedBrowsing implements Service, Registerable, Conditional, Delayed, HasRequirements {
/**
* Query var for requests to open the app.
*
* @var string
*/
const APP_QUERY_VAR = 'amp-paired-browsing';
/**
* DevTools User Access.
*
* @var UserAccess
*/
public $dev_tools_user_access;
/**
* Paired Routing.
*
* @var PairedRouting
*/
public $paired_routing;
/**
* Get the action to use for registering the service.
*
* This action needs to run late enough in the frontend and the backend for the user to be logged-in and for
* AMP dev mode to be opted-in to.
*
* @return string Registration action to use.
*/
public static function get_registration_action() {
return 'wp_loaded';
}
/**
* Check whether the conditional object is currently needed.
*
* @return bool Whether the conditional object is needed.
*/
public static function is_needed() {
return (
Services::get( 'dependency_support' )->has_support()
&&
(
AMP_Theme_Support::TRANSITIONAL_MODE_SLUG === AMP_Options_Manager::get_option( Option::THEME_SUPPORT )
||
(
AMP_Theme_Support::READER_MODE_SLUG === AMP_Options_Manager::get_option( Option::THEME_SUPPORT )
&&
get_stylesheet() === AMP_Options_Manager::get_option( Option::READER_THEME )
)
)
&&
amp_is_dev_mode()
&&
is_user_logged_in()
);
}
/**
* Get the list of service IDs required for this service to be registered.
*
* @return string[] List of required services.
*/
public static function get_requirements() {
return [
'dependency_support',
];
}
/**
* PairedBrowsing constructor.
*
* @param UserAccess $dev_tools_user_access DevTools User Access.
* @param PairedRouting $paired_routing Paired Routing.
*/
public function __construct( UserAccess $dev_tools_user_access, PairedRouting $paired_routing ) {
$this->dev_tools_user_access = $dev_tools_user_access;
$this->paired_routing = $paired_routing;
}
/**
* Adds the filters.
*/
public function register() {
add_action( 'wp', [ $this, 'init_frontend' ], PHP_INT_MAX );
add_filter( 'amp_dev_mode_element_xpaths', [ $this, 'filter_dev_mode_element_xpaths' ] );
add_filter( 'amp_validated_url_status_actions', [ $this, 'filter_validated_url_status_actions' ], 10, 2 );
}
/**
* Filter Dev Mode XPaths to include the inline script used by the client.
*
* @param string[] $xpaths Element XPaths.
* @return string[] XPaths.
*/
public function filter_dev_mode_element_xpaths( $xpaths ) {
$xpaths[] = '//script[ @id = "amp-paired-browsing-client-js-before" ]';
return $xpaths;
}
/**
* Filter the status actions for a validated URL to add the paired browsing link.
*
* @param string[] $actions Action links.
* @param WP_Post $post AMP Validated URL post.
* @return string[] Actions.
*/
public function filter_validated_url_status_actions( $actions, WP_Post $post ) {
$actions['paired_browsing'] = sprintf(
'<a href="%s">%s</a>',
esc_url( $this->get_paired_browsing_url( AMP_Validated_URL_Post_Type::get_url_from_post( $post ) ) ),
esc_html__( 'Paired Browsing', 'amp' )
);
return $actions;
}
/**
* Initialize frontend.
*/
public function init_frontend() {
if ( ! amp_is_available() ) {
return;
}
if ( isset( $_GET[ self::APP_QUERY_VAR ] ) ) { // phpcs:ignore WordPress.Security.NonceVerification.Recommended
$this->init_app();
} else {
$this->init_client();
}
}
/**
* Set up app.
*
* This is the parent request that has the iframes for both AMP and non-AMP.
*/
public function init_app() {
add_action( 'template_redirect', [ $this, 'ensure_app_location' ] );
add_filter( 'template_include', [ $this, 'filter_template_include_for_app' ], PHP_INT_MAX );
}
/**
* Set up client.
*
* Make sure pages have the paired browsing client script so that the app can interact with it.
*/
public function init_client() {
add_action( 'admin_bar_menu', [ $this, 'add_admin_bar_menu_item' ], 102 );
$handle = 'amp-paired-browsing-client';
$asset = require AMP__DIR__ . '/assets/js/amp-paired-browsing-client.asset.php';
$dependencies = $asset['dependencies'];
$version = $asset['version'];
wp_enqueue_script(
$handle,
amp_get_asset_url( '/js/amp-paired-browsing-client.js' ),
$dependencies,
$version,
true
);
$is_amp_request = amp_is_request();
$current_url = amp_get_current_url();
$amp_url = $is_amp_request ? $current_url : $this->paired_routing->add_endpoint( $current_url );
$non_amp_url = ! $is_amp_request ? $current_url : $this->paired_routing->remove_endpoint( $current_url );
wp_add_inline_script(
$handle,
sprintf(
'var ampPairedBrowsingClientData = %s;',
wp_json_encode(
[
'isAmpDocument' => $is_amp_request,
'ampUrl' => $amp_url,
'nonAmpUrl' => $non_amp_url,
]
)
),
'before'
);
// Mark enqueued script for AMP dev mode so that it is not removed.
// @todo Revisit with <https://github.com/google/site-kit-wp/pull/505#discussion_r348683617>.
$dev_mode_handles = array_merge(
[ $handle, 'regenerator-runtime', 'wp-polyfill', 'wp-polyfill-inert' ],
$dependencies
);
add_filter(
'script_loader_tag',
static function ( $tag, $script_handle ) use ( $dev_mode_handles ) {
if ( amp_is_request() && in_array( $script_handle, $dev_mode_handles, true ) ) {
$tag = preg_replace( '/(?<=<script)(?=\s|>)/i', ' ' . DevMode::DEV_MODE_ATTRIBUTE, $tag );
}
return $tag;
},
10,
2
);
}
/**
* Add paired browsing menu item to admin bar for AMP.
*
* @param WP_Admin_Bar $wp_admin_bar Admin bar.
*/
public function add_admin_bar_menu_item( WP_Admin_Bar $wp_admin_bar ) {
if ( $this->dev_tools_user_access->is_user_enabled() ) {
$wp_admin_bar->add_node(
[
'parent' => 'amp',
'id' => 'amp-paired-browsing',
'title' => esc_html__( 'Paired Browsing', 'amp' ),
'href' => esc_url( $this->get_paired_browsing_url() ),
]
);
}
}
/**
* Get paired browsing URL for a given URL.
*
* @param string $url URL.
* @return string Paired browsing URL.
*/
public function get_paired_browsing_url( $url = null ) {
if ( ! $url ) {
$url = amp_get_current_url();
}
$url = $this->paired_routing->remove_endpoint( $url );
$url = remove_query_arg(
[ QueryVar::NOAMP, AMP_Validated_URL_Post_Type::VALIDATE_ACTION, AMP_Validation_Manager::VALIDATION_ERROR_TERM_STATUS_QUERY_VAR ],
$url
);
$url = add_query_arg( self::APP_QUERY_VAR, '1', $url );
return $url;
}
/**
* Remove any unnecessary query vars that could hamper the paired browsing experience.
*
* When a redirect is successfully done, this method will exit and not return anything. Exiting is prevented by
* filtering `wp_redirect` to be `false`.
*
* @return bool Whether redirection was needed.
*/
public function ensure_app_location() {
$original_url = amp_get_current_url();
$updated_url = $this->get_paired_browsing_url( $original_url );
if ( $updated_url === $original_url ) {
return false;
}
if ( wp_safe_redirect( $updated_url ) ) {
exit; // @codeCoverageIgnore
}
return true;
}
/**
* Serve paired browsing experience if it is being requested.
*
* Includes a custom template that acts as an interface to facilitate a side-by-side comparison of a
* non-AMP page and its AMP version to review any discrepancies.
*
* @return string Custom template if in paired browsing mode, else the supplied template.
*/
public function filter_template_include_for_app() {
$handle = 'amp-paired-browsing-app';
wp_enqueue_style(
$handle,
amp_get_asset_url( '/css/amp-paired-browsing-app.css' ),
[ 'dashicons' ],
AMP__VERSION
);
wp_styles()->add_data( $handle, 'rtl', 'replace' );
$handle = 'amp-paired-browsing-app';
$asset = require AMP__DIR__ . '/assets/js/amp-paired-browsing-app.asset.php';
$dependencies = $asset['dependencies'];
$version = $asset['version'];
wp_enqueue_script(
$handle,
amp_get_asset_url( '/js/amp-paired-browsing-app.js' ),
$dependencies,
$version,
true
);
$data = [
'ampPairedBrowsingQueryVar' => self::APP_QUERY_VAR,
'noampQueryVar' => QueryVar::NOAMP,
'noampMobile' => QueryVar::NOAMP_MOBILE,
'documentTitlePrefix' => __( 'AMP Paired Browsing:', 'amp' ),
];
wp_add_inline_script(
$handle,
sprintf(
'var ampPairedBrowsingAppData = %s;',
wp_json_encode( $data )
),
'before'
);
return AMP__DIR__ . '/includes/templates/amp-paired-browsing.php';
}
}