404 page for broken links

public.php

@@ -40,7 +40,7 @@ if (isset($fileOwner)) {
 	\OCP\Util::addScript('documents', 'documents');
 	$tmpl->assign('document', $token);
 } else {
-	// TODO: show nice 404 page
+	$tmpl->assign('notFound', true);
 }
 
 $tmpl->printPage();

templates/public.php

@@ -1,5 +1,12 @@
+<div id="notification-container">
+	<div id="notification" style="display: none;"></div>
+</div>
 <div id="documents-content">
 	<?php if (isset($_['document'])): ?>
 		<input type="hidden" name="document" value ="<?php p($_['document']) ?>" />
 	<?php endif; ?>
+	<?php if (isset($_['notFound'])): ?>
+		<div class="push"></div>
+		<div class="warning"><?php p($l->t('This link has been expired or is never existed. Please contact the person who shared it with you for details.')) ?></div>
+	<?php endif; ?>
 </div>