Add unified search toggle in config

The new global search UI is new and might be unstable, hence
we are giving users the option to use the old unified search UI, if
the encounter signficant bottlenecks.

Signed-off-by: fenn-cs <[email protected]>
Signed-off-by: nextcloud-command <[email protected]>

Author: nfebe

config/config.sample.php

@@ -2395,4 +2395,11 @@
  * Defaults to ``true``
  */
 'reference_opengraph' => true,
+
+/**
+ * Enable use of old unified search
+ *
+ * Defaults to ``false``
+ */
+'unified_search.enabled' => false,
 ];

lib/private/TemplateLayout.php

@@ -106,12 +106,18 @@ public function __construct($renderAs, $appId = '') {
 
 			$this->initialState->provideInitialState('core', 'active-app', $this->navigationManager->getActiveEntry());
 			$this->initialState->provideInitialState('core', 'apps', $this->navigationManager->getAll());
-			$this->initialState->provideInitialState('unified-search', 'limit-default', (int)$this->config->getAppValue('core', 'unified-search.limit-default', (string)SearchQuery::LIMIT_DEFAULT));
-			$this->initialState->provideInitialState('unified-search', 'min-search-length', (int)$this->config->getAppValue('core', 'unified-search.min-search-length', (string)1));
-			$this->initialState->provideInitialState('unified-search', 'live-search', $this->config->getAppValue('core', 'unified-search.live-search', 'yes') === 'yes');
-			Util::addScript('core', 'unified-search', 'core');
-			Util::addScript('core', 'global-search', 'core');
-
+			/*
+			 * NB : Unified search enabled, defaults to true since new advanced search is
+			 * unstable. Once we think otherwise, the default should be false.
+			 */
+			if ($this->config->getSystemValueBool('unified_search.enabled', true)) {
+				$this->initialState->provideInitialState('unified-search', 'limit-default', (int)$this->config->getAppValue('core', 'unified-search.limit-default', (string)SearchQuery::LIMIT_DEFAULT));
+				$this->initialState->provideInitialState('unified-search', 'min-search-length', (int)$this->config->getAppValue('core', 'unified-search.min-search-length', (string)1));
+				$this->initialState->provideInitialState('unified-search', 'live-search', $this->config->getAppValue('core', 'unified-search.live-search', 'yes') === 'yes');
+				Util::addScript('core', 'unified-search', 'core');
+			} else {
+				Util::addScript('core', 'global-search', 'core');
+			}
 			// Set body data-theme
 			$this->assign('enabledThemes', []);
 			if (\OC::$server->getAppManager()->isEnabledForUser('theming') && class_exists('\OCA\Theming\Service\ThemesService')) {