do not persist data in a getter!

includes/model/class-blog-user.php

@@ -75,19 +75,12 @@ class Blog_User extends User {
 	 * @return string The auto-generated Username.
 	 */
 	public static function get_default_username() {
-		$username = \get_option( 'activitypub_blog_user_identifier' );
-
-		if ( $username ) {
-			return $username;
-		}
-
 		// check if domain host has a subdomain
 		$host       = \wp_parse_url( \get_home_url(), \PHP_URL_HOST );
 		$host       = \preg_replace( '/^www\./i', '', $host );
 		$host_parts = \explode( '.', $host );
 
 		if ( \count( $host_parts ) <= 2 && strlen( $host ) <= 15 ) {
-			\update_option( 'activitypub_blog_user_identifier', $host );
 			return $host;
 		}
 
@@ -96,7 +89,6 @@ class Blog_User extends User {
 		$blog_title = \sanitize_title( $blog_title );
 
 		if ( strlen( $blog_title ) <= 15 ) {
-			\update_option( 'activitypub_blog_user_identifier', $blog_title );
 			return $blog_title;
 		}
 
@@ -111,12 +103,17 @@ class Blog_User extends User {
 
 		// get random item of $default_identifier
 		$default = $default_identifier[ \array_rand( $default_identifier ) ];
-		\update_option( 'activitypub_blog_user_identifier', $default );
 
 		return $default;
 	}
 
 	public function get_preferred_username() {
+		$username = \get_option( 'activitypub_blog_user_identifier' );
+
+		if ( $username ) {
+			return $username;
+		}
+
 		return self::get_default_username();
 	}
 

templates/settings.php

@@ -31,7 +31,7 @@
 	<form method="post" action="options.php">
 		<?php \settings_fields( 'activitypub' ); ?>
 
-		<?php if ( ! \Activitypub\is_user_disabled( \Activitypub\Collection\Users::BLOG_USER_ID ) ) : ?>
+	<?php if ( ! \Activitypub\is_user_disabled( \Activitypub\Collection\Users::BLOG_USER_ID ) ) : ?>
 
 		<h3><?php \esc_html_e( 'Blog-User', 'activitypub' ); ?></h3>
 
@@ -58,7 +58,7 @@
 
 		<?php \do_settings_fields( 'activitypub', 'blog-user' ); ?>
 
-		<?php endif; ?>
+	<?php endif; ?>
 
 		<h3><?php \esc_html_e( 'Activities', 'activitypub' ); ?></h3>