init

wp-content/plugins/jetpack/extensions/blocks/subscriber-login/class-jetpack-subscription-site.php

@@ -0,0 +1,96 @@
+<?php
+/**
+ * Adds support for Jetpack Subscription Site feature.
+ *
+ * @package automattic/jetpack
+ * @since 13.3
+ */
+
+namespace Automattic\Jetpack\Extensions\Subscriber_Login;
+
+use WP_Block_Template;
+use WP_Post;
+
+/**
+ * Jetpack_Subscription_Site class.
+ */
+class Jetpack_Subscription_Site {
+	/**
+	 * Jetpack_Subscription_Site singleton instance.
+	 *
+	 * @var Jetpack_Subscription_Site|null
+	 */
+	private static $instance;
+
+	/**
+	 * Jetpack_Subscription_Site instance init.
+	 */
+	public static function init() {
+		if ( self::$instance === null ) {
+			self::$instance = new Jetpack_Subscription_Site();
+		}
+
+		return self::$instance;
+	}
+
+	/**
+	 * Handles Subscriber Login block placements.
+	 *
+	 * @return void
+	 */
+	public function handle_subscriber_login_block_placements() {
+		$this->handle_subscriber_login_block_navigation_placement();
+	}
+
+	/**
+	 * Returns true if context is recognized as a header element.
+	 *
+	 * @param WP_Block_Template|WP_Post|array $context The block template, template part, or pattern the anchor block belongs to.
+	 *
+	 * @return bool
+	 */
+	protected function is_header_context( $context ) {
+		if ( $context instanceof WP_Post && $context->post_type === 'wp_navigation' ) {
+			return true;
+		}
+
+		if ( $context instanceof WP_Block_Template && $context->area === 'header' ) {
+			return true;
+		}
+
+		return false;
+	}
+
+	/**
+	 * Handles Subscriber Login block navigation placement.
+	 *
+	 * @return void
+	 */
+	protected function handle_subscriber_login_block_navigation_placement() {
+		$subscriber_login_navigation_enabled = get_option( 'jetpack_subscriptions_login_navigation_enabled', false );
+		if ( ! $subscriber_login_navigation_enabled ) {
+			return;
+		}
+
+		if ( ! wp_is_block_theme() ) { // TODO Fallback for classic themes.
+			return;
+		}
+
+		add_filter(
+			'hooked_block_types',
+			function ( $hooked_blocks, $relative_position, $anchor_block, $context ) {
+				if (
+					$anchor_block === 'core/navigation' &&
+					$relative_position === 'last_child' &&
+					self::is_header_context( $context )
+				) {
+					$hooked_blocks[] = 'jetpack/subscriber-login';
+				}
+
+				return $hooked_blocks;
+			},
+			10,
+			4
+		);
+	}
+}