99 lines
2.5 KiB
PHP
99 lines
2.5 KiB
PHP
<?php
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/**
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* Cookie-consent Block.
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*
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* @since 12.0
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*
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* @package automattic/jetpack
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*/
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namespace Automattic\Jetpack\Extensions\CookieConsent;
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use Automattic\Jetpack\Blocks;
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use Jetpack_Gutenberg;
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const FEATURE_NAME = 'cookie-consent';
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const BLOCK_NAME = 'jetpack/' . FEATURE_NAME;
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const COOKIE_NAME = 'eucookielaw';
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/**
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* Should the block be registered?
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* In wp-admin, we only want to show the block in the site editor.
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*
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* @since 12.0
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*
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* @return bool
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*/
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function should_register_block() {
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global $pagenow;
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// Always register the widget if we're on the front end
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if ( ! is_admin() ) {
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return true;
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}
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if ( is_admin() && $pagenow === 'site-editor.php' ) {
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return true;
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}
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}
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/**
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* Registers the block for use in Gutenberg
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* This is done via an action so that we can disable
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* registration if we need to.
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*/
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function register_block() {
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if ( ! should_register_block() ) {
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return;
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}
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Blocks::jetpack_register_block(
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BLOCK_NAME,
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array( 'render_callback' => __NAMESPACE__ . '\load_assets' )
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);
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}
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add_action( 'init', __NAMESPACE__ . '\register_block' );
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/**
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* Cookie-consent block registration/dependency declaration.
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*
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* @param array $attr Array containing the Cookie-consent block attributes.
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* @param string $content String containing the Cookie-consent block content.
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*
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* @return string
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*/
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function load_assets( $attr, $content ) {
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// We want to bust the cache even if the cookie isn't set.
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// This is needed for when the cookie expires,
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// and we should send fresh HTML with the cookie block in it.
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notify_batcache_that_content_changed();
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// If the user has already accepted the cookie consent, don't show the block.
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if ( isset( $_COOKIE[ COOKIE_NAME ] ) ) {
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return '';
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}
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/*
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* Enqueue necessary scripts and styles.
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*/
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Jetpack_Gutenberg::load_assets_as_required( FEATURE_NAME );
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return sprintf(
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'<div class="%1$s">%2$s</div>',
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esc_attr( Blocks::classes( FEATURE_NAME, $attr ) ),
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$content
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);
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}
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/**
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* 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).
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* Because, by default, the cache doesn't vary around the cookie's value. This makes the cookie value part of the cache key.
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*
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* See: https://github.com/Automattic/batcache/blob/d4f617b335e9772a61b6d03ad3498b55c8137592/advanced-cache.php#L29
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*/
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function notify_batcache_that_content_changed() {
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if ( function_exists( 'vary_cache_on_function' ) ) {
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vary_cache_on_function( 'return isset( $_COOKIE[ "' . COOKIE_NAME . '" ] );' );
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}
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}
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