From 9500f0acd34f6169066f7cc975ff286d5a4739c0 Mon Sep 17 00:00:00 2001
From: Elmar Ludwig <elmar.ludwig@uni-osnabrueck.de>
Date: Mon, 2 Mar 2026 17:41:50 +0100
Subject: avoid batch loading of plugins by type, fixes #6260

Closes #6260

Merge request studip/studip!4740
---
 lib/plugins/engine/PluginEngine.php  | 53 ++++++++++++++++++++++--------------
 lib/plugins/engine/PluginManager.php | 18 ------------
 2 files changed, 33 insertions(+), 38 deletions(-)

diff --git a/lib/plugins/engine/PluginEngine.php b/lib/plugins/engine/PluginEngine.php
index 5c7bad5..f6cb832 100644
--- a/lib/plugins/engine/PluginEngine.php
+++ b/lib/plugins/engine/PluginEngine.php
@@ -34,33 +34,46 @@ class PluginEngine
      */
     public static function loadPlugins()
     {
-        global $user, $perm;
-
-        // load system plugins
-        self::getPlugins(SystemPlugin::class);
-
-        // load homepage plugins
-        self::getPlugins(HomepagePlugin::class);
-
+        $plugin_manager = PluginManager::getInstance();
+        $plugin_info = $plugin_manager->getPluginInfos();
         $context_id = Context::getId();
 
-        // load course plugins
-        if ($context_id) {
-            $modules = self::getPlugins(StudipModule::class, $context_id);
-            $navigation = Navigation::getItem('/course');
+        uasort($plugin_info, fn($a, $b) =>
+            $b['core'] - $a['core'] ?: $a['position'] - $b['position']
+        );
 
-            foreach ($modules as $module) {
-                $tabs = $module->getTabNavigation($context_id);
+        foreach ($plugin_info as $id => $info) {
+            // load system plugins
+            if (in_array(SystemPlugin::class, $info['type'])) {
+                $plugin_manager->getPluginById($id);
+            }
 
-                if ($navigation && $tabs) {
-                    $navigation->addToolNavigation($module->getPluginId(), $tabs);
+            // load homepage plugins
+            if (in_array(HomepagePlugin::class, $info['type'])) {
+                $plugin_manager->getPluginById($id);
+            }
+
+            // load course plugins
+            if (in_array(StudipModule::class, $info['type'])) {
+                if ($context_id) {
+                    if ($plugin_manager->isPluginActivated($id, $context_id)) {
+                        $navigation = Navigation::getItem('/course');
+                        $module = $plugin_manager->getPluginById($id);
+                        $tabs = $module->getTabNavigation($context_id);
+
+                        if ($navigation && $tabs) {
+                            $navigation->addToolNavigation($id, $tabs);
+                        }
+                    }
                 }
             }
-        }
 
-        // load admin plugins
-        if (is_object($user) && $perm->have_perm('admin')) {
-            self::getPlugins(AdministrationPlugin::class);
+            // load admin plugins
+            if (in_array(AdministrationPlugin::class, $info['type'])) {
+                if ($GLOBALS['perm']->have_perm('admin')) {
+                    $plugin_manager->getPluginById($id);
+                }
+            }
         }
     }
 
diff --git a/lib/plugins/engine/PluginManager.php b/lib/plugins/engine/PluginManager.php
index 4bcb96b..c66949a 100644
--- a/lib/plugins/engine/PluginManager.php
+++ b/lib/plugins/engine/PluginManager.php
@@ -51,22 +51,6 @@ class PluginManager
     }
 
     /**
-     * Comparison function used to order plugins by position.
-     */
-    private static function positionCompare (array $plugin1, array $plugin2): int
-    {
-        if ($plugin1['core'] && !$plugin2['core']) {
-            return -1;
-        }
-
-        if (!$plugin1['core'] && $plugin2['core']) {
-            return 1;
-        }
-
-        return $plugin1['position'] - $plugin2['position'];
-    }
-
-    /**
      * Read meta data for all plugins registered in the data base.
      */
     private function readPluginInfos ()
@@ -662,8 +646,6 @@ class PluginManager
         $plugin_info = $this->getPluginInfos($type);
         $plugins = [];
 
-        usort($plugin_info, [self::class, 'positionCompare']);
-
         foreach ($plugin_info as $info) {
             $activated = $context == null
                 || $this->isPluginActivated($info['id'], $context);
-- 
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