Edit notices

Show a message in the Subject editor, the Subject creator and Manage subjects.

class ApprovalEditNoticeProvider implements SubjectEditNoticeProvider {

	public function __construct(
		private readonly MessageLocalizer $messageLocalizer
	) {
	}

	public function getNotices( SubjectEditNoticeContext $context ): array {
		return [ new SubjectEditNotice(
			key: 'myext-approval',
			html: $this->messageLocalizer->msg( 'myext-approval-notice' )->parse()
		) ];
	}

}

Register with NeoWikiRegistrar::addSubjectEditNoticeProvider(). Provider html is inserted as given: escape it yourself. Notices render in registration order after the ones admins write as interface messages; providers are not called for pages the requesting user may not read. SubjectEditNoticeContext exposes $pageId, $pageDbKey, $namespaceId, and $schemaName when a Schema is known.

Namespace keys to your extension; the first provider to claim a key keeps it. Edit notices lists the keys admins use.