Fix/launch task completion (#36839)

* Adds a complete callback to the launch site task

* changelog

* Fixed phpdoc

* Added explicit blog id

* persist task completion status

* fixing linting

* fixing changelogger validity

projects/packages/jetpack-mu-wpcom/changelog/fix-launch-task-completion

@@ -0,0 +1,4 @@
+Significance: patch
+Type: fixed
+
+Added completed callback for site_launched task

projects/packages/jetpack-mu-wpcom/src/features/launchpad/launchpad-task-definitions.php

@@ -154,6 +154,7 @@ function wpcom_launchpad_get_task_definitions() {
 				return __( 'Launch your site', 'jetpack-mu-wpcom' );
 			},
 			'isLaunchTask'          => true,
+			'is_complete_callback'  => 'wpcom_launchpad_is_site_launched',
 			'add_listener_callback' => 'wpcom_launchpad_add_site_launch_listener',
 		),
 		'verify_email'                    => array(
@@ -736,6 +737,29 @@ function wpcom_launchpad_get_task_definitions() {
 	return array_merge( $extended_task_definitions, $task_definitions );
 }
 
+/**
+ * Returns true if the current site is launched.
+ *
+ * @param array $task The task object.
+ * @param bool  $is_complete The current task status.
+ *
+ * @return boolean
+ */
+function wpcom_launchpad_is_site_launched( $task, $is_complete ) {
+	if ( $is_complete ) {
+		return true;
+	}
+
+	$launch_status = get_blog_option( get_current_blog_id(), 'launch-status' );
+
+	if ( 'launched' === $launch_status ) {
+		wpcom_mark_launchpad_task_complete( 'site_launched' );
+		return true;
+	} else {
+		return false;
+	}
+}
+
 /**
  * Record completion event in Tracks if we're running on WP.com.
  *