From 32ac5e7af81eee5a53e24568d779f5fb6e30583d Mon Sep 17 00:00:00 2001
From: Ferdinand Thiessen <opensource@fthiessen.de>
Date: Sat, 23 Sep 2023 14:21:49 +0200
Subject: [PATCH] fix(theming): Make sure the footer is hidden if not content
 is rendered

Previously the footer was empty, but the backdrop was still shown.
This hides the footer if no text content was defined.

Signed-off-by: Ferdinand Thiessen <opensource@fthiessen.de>
---
 apps/theming/lib/ThemingDefaults.php | 15 ++++++++++-----
 core/css/guest.scss                  |  3 +--
 core/templates/layout.guest.php      |  9 +++++++--
 core/templates/layout.public.php     |  2 +-
 themes/example/defaults.php          | 12 ++++++++++--
 5 files changed, 29 insertions(+), 12 deletions(-)

diff --git a/apps/theming/lib/ThemingDefaults.php b/apps/theming/lib/ThemingDefaults.php
index 7f74539ed5d..1e55a1fb2f9 100644
--- a/apps/theming/lib/ThemingDefaults.php
+++ b/apps/theming/lib/ThemingDefaults.php
@@ -172,11 +172,16 @@ class ThemingDefaults extends \OC_Defaults {
 	public function getShortFooter() {
 		$slogan = $this->getSlogan();
 		$baseUrl = $this->getBaseUrl();
-		if ($baseUrl !== '') {
-			$footer = '<a href="' . $baseUrl . '" target="_blank"' .
-				' rel="noreferrer noopener" class="entity-name">' . $this->getEntity() . '</a>';
-		} else {
-			$footer = '<span class="entity-name">' .$this->getEntity() . '</span>';
+		$entity = $this->getEntity();
+		$footer = '';
+
+		if ($entity !== '') {
+			if ($baseUrl !== '') {
+				$footer = '<a href="' . $baseUrl . '" target="_blank"' .
+					' rel="noreferrer noopener" class="entity-name">' . $entity . '</a>';
+			} else {
+				$footer = '<span class="entity-name">' .$entity . '</span>';
+			}
 		}
 		$footer .= ($slogan !== '' ? ' – ' . $slogan : '');
 
diff --git a/core/css/guest.scss b/core/css/guest.scss
index f834149fd35..be352135de4 100644
--- a/core/css/guest.scss
+++ b/core/css/guest.scss
@@ -107,7 +107,7 @@ body {
 .wrapper {
 	width: 100%;
 	max-width: 700px;
-	margin-top: 10vh;
+	margin-block: 10vh auto;
 }
 
 /* Default FORM */
@@ -736,7 +736,6 @@ img.icon-loading-small-dark, object.icon-loading-small-dark, video.icon-loading-
 
 /* FOOTER */
 footer {
-	margin-top: auto;
 	.info .entity-name {
 		font-weight: bold;
 	}
diff --git a/core/templates/layout.guest.php b/core/templates/layout.guest.php
index 41f519574a1..450f8caf676 100644
--- a/core/templates/layout.guest.php
+++ b/core/templates/layout.guest.php
@@ -47,9 +47,14 @@ p($theme->getTitle());
 				</main>
 			</div>
 		</div>
-		<footer class="guest-box">
+		<?php
+		$longFooter = $theme->getLongFooter();
+		?>
+		<footer class="guest-box <?php if ($longFooter === '') {
+			p('hidden');
+		} ?>">
 			<p class="info">
-				<?php print_unescaped($theme->getLongFooter()); ?>
+				<?php print_unescaped($longFooter); ?>
 			</p>
 		</footer>
 	</body>
diff --git a/core/templates/layout.public.php b/core/templates/layout.public.php
index eef140a1cd5..8ebbef828b4 100644
--- a/core/templates/layout.public.php
+++ b/core/templates/layout.public.php
@@ -103,7 +103,7 @@ if (isset($template) && $template->getActionCount() !== 0) {
 		</h1>
 		<?php print_unescaped($_['content']); ?>
 	</main>
-	<?php if (isset($template) && $template->getFooterVisible()) { ?>
+	<?php if (isset($template) && $template->getFooterVisible() && ($theme->getLongFooter() !== '' || $_['showSimpleSignUpLink'])) { ?>
 	<footer>
 		<p><?php print_unescaped($theme->getLongFooter()); ?></p>
 		<?php
diff --git a/themes/example/defaults.php b/themes/example/defaults.php
index a1c749c46c9..7ed7a2766e4 100644
--- a/themes/example/defaults.php
+++ b/themes/example/defaults.php
@@ -81,8 +81,16 @@ class OC_Theme {
 	 * @return string short footer
 	 */
 	public function getShortFooter(): string {
-		$footer = '© ' . date('Y') . ' <a href="' . $this->getBaseUrl() . '" target="_blank">' . $this->getEntity() . '</a>' .
-			'<br/>' . $this->getSlogan();
+		$entity = $this->getEntity();
+
+		$footer = '© ' . date('Y');
+
+		// Add link if entity name is not empty
+		if ($entity !== '') {
+			$footer .= ' <a href="' . $this->getBaseUrl() . '" target="_blank">' . $entity . '</a>' . '<br/>';
+		}
+
+		$footer .= $this->getSlogan();
 
 		return $footer;
 	}