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<?php
/**
* Cookie-consent Block.
*
* @since 12.0
*
* @package automattic/jetpack
*/
namespace Automattic\Jetpack\Extensions\CookieConsent;
use Automattic\Jetpack\Blocks;
use Jetpack_Gutenberg;
const COOKIE_NAME = 'eucookielaw';
/**
* Should the block be registered?
* In wp-admin, we only want to show the block in the site editor.
*
* @since 12.0
*
* @return bool
*/
function should_register_block() {
global $pagenow;
// Always register the widget if we're on the front end
if ( ! is_admin() ) {
return true;
}
if ( is_admin() && $pagenow === 'site-editor.php' ) {
return true;
}
}
/**
* Registers the block for use in Gutenberg
* This is done via an action so that we can disable
* registration if we need to.
*/
function register_block() {
if ( ! should_register_block() ) {
return;
}
Blocks::jetpack_register_block(
__DIR__,
array(
'render_callback' => __NAMESPACE__ . '\load_assets',
'attributes' => array(
'render_from_template' => array(
'default' => false,
'type' => 'boolean',
),
),
)
);
}
add_action( 'init', __NAMESPACE__ . '\register_block' );
/**
* Cookie-consent block registration/dependency declaration.
*
* @param array $attr Array containing the Cookie-consent block attributes.
* @param string $content String containing the Cookie-consent block content.
*
* @return string
*/
function load_assets( $attr, $content ) {
// We want to bust the cache even if the cookie isn't set.
// This is needed for when the cookie expires,
// and we should send fresh HTML with the cookie block in it.
notify_batcache_that_content_changed();
if (
/**
* Filters the display of the Cookie-consent Block e.g by GDPR CMP banner on WordAds sites.
*
* @since 13.2
*
* @param bool $disable_cookie_consent_block Whether to disable the Cookie-consent Block.
*/
apply_filters( 'jetpack_disable_cookie_consent_block', false )
) {
return '';
}
// If the user has already accepted the cookie consent, don't show the block.
if ( isset( $_COOKIE[ COOKIE_NAME ] ) ) {
return '';
}
$option = get_option( 'cookie_consent_template' );
if ( ! empty( $option ) && empty( $attr['render_from_template'] ) ) {
return '';
}
/*
* Enqueue necessary scripts and styles.
*/
Jetpack_Gutenberg::load_assets_as_required( __DIR__ );
return sprintf(
'<div class="%1$s">%2$s</div>',
esc_attr( Blocks::classes( Blocks::get_block_feature( __DIR__ ), $attr ) ),
$content
);
}
/**
* Batcache busting: since the cookie consent is part of the cached response HTML, it can still render even when the cookie is set (when it shouldn't).
* Because, by default, the cache doesn't vary around the cookie's value. This makes the cookie value part of the cache key.
*
* See: https://github.com/Automattic/batcache/blob/d4f617b335e9772a61b6d03ad3498b55c8137592/advanced-cache.php#L29
*/
function notify_batcache_that_content_changed() {
if ( function_exists( 'vary_cache_on_function' ) ) {
vary_cache_on_function( 'return isset( $_COOKIE[ "' . COOKIE_NAME . '" ] );' );
}
}
/**
* Render the cookie consent template.
*
* @since 12.4
*/
function render_cookie_consent_template() {
if ( is_admin() ) {
return;
}
// Check whether block theme functions exist.
if ( ! function_exists( 'parse_blocks' ) ) {
return;
}
$template = get_option( 'cookie_consent_template' );
if ( empty( $template ) ) {
return;
}
$parsed = parse_blocks( $template );
if ( ! empty( $parsed[0] ) ) {
$parsed[0]['attrs']['render_from_template'] = true;
echo render_block( $parsed[0] ); // phpcs:ignore WordPress.Security.EscapeOutput.OutputNotEscaped
}
}
add_action( 'wp_footer', __NAMESPACE__ . '\render_cookie_consent_template' );
/**
* Register cookie_consent_template setting
*
* @since 12.4
*/
function cookie_consent_register_settings() {
register_setting(
'general',
'cookie_consent_template',
array(
'type' => 'string',
'show_in_rest' => true,
)
);
}
add_action( 'rest_api_init', __NAMESPACE__ . '\cookie_consent_register_settings' );