From 1025db9813b9531fd3bfcf5f3e77832879d3b0ba Mon Sep 17 00:00:00 2001
From: Justus Dieckmann <justusdieckmann@wwu.de>
Date: Tue, 20 Feb 2024 14:39:32 +0100
Subject: [PATCH] Hide menu when there is no manual workflow

---
 classes/local/manager/workflow_manager.php | 12 ++++++++++++
 db/caches.php                              |  5 +++++
 lib.php                                    | 15 ++++++++++++---
 version.php                                |  2 +-
 4 files changed, 30 insertions(+), 4 deletions(-)

diff --git a/classes/local/manager/workflow_manager.php b/classes/local/manager/workflow_manager.php
index 97465f54..25c09b82 100644
--- a/classes/local/manager/workflow_manager.php
+++ b/classes/local/manager/workflow_manager.php
@@ -244,6 +244,14 @@ public static function activate_workflow($workflowid) {
         $transaction->allow_commit();
     }
 
+    /**
+     * Resets the 'does a manual workflow exist?'-cache.
+     */
+    private static function reset_manual_workflow_cache() {
+        $cache = \cache::make('tool_lifecycle', 'application');
+        $cache->delete('manualworkflowexists');
+    }
+
     /**
      * Handles an action of the subplugin_settings.
      *
@@ -260,6 +268,7 @@ public static function handle_action($action, $workflowid) {
         }
         if ($action === action::WORKFLOW_ACTIVATE) {
             self::activate_workflow($workflowid);
+            self::reset_manual_workflow_cache();
         } else if ($action === action::UP_WORKFLOW) {
             self::change_sortindex($workflowid, true);
         } else if ($action === action::DOWN_WORKFLOW) {
@@ -270,10 +279,12 @@ public static function handle_action($action, $workflowid) {
             self::backup_workflow($workflowid);
         } else if ($action === action::WORKFLOW_DISABLE) {
             self::disable($workflowid);
+            self::reset_manual_workflow_cache();
             return; // Return, since we do not want to redirect outside to deactivated workflows.
         } else if ($action === action::WORKFLOW_ABORTDISABLE) {
             self::disable($workflowid);
             self::abortprocesses($workflowid);
+            self::reset_manual_workflow_cache();
             return; // Return, since we do not want to redirect outside to deactivated workflows.
         } else if ($action === action::WORKFLOW_ABORT) {
             self::abortprocesses($workflowid);
@@ -283,6 +294,7 @@ public static function handle_action($action, $workflowid) {
             if (self::get_workflow($workflowid) &&
                 self::is_removable($workflowid)) {
                 self::remove($workflowid);
+                self::reset_manual_workflow_cache();
             } else {
                 \core\notification::add(get_string('workflow_not_removeable', 'tool_lifecycle')
                     , \core\notification::WARNING);
diff --git a/db/caches.php b/db/caches.php
index 6335a0b2..a475590c 100644
--- a/db/caches.php
+++ b/db/caches.php
@@ -28,4 +28,9 @@
         'mformdata' => [
                 'mode' => cache_store::MODE_SESSION,
         ],
+        'application' => [
+                'mode' => cache_store::MODE_APPLICATION,
+                'simplekeys' => true,
+                'simpledata' => true
+        ]
 ];
diff --git a/lib.php b/lib.php
index 28be8395..e54a64bf 100644
--- a/lib.php
+++ b/lib.php
@@ -32,7 +32,7 @@
  * @throws moodle_exception
  */
 function tool_lifecycle_extend_navigation_course($navigation, $course, $context) {
-    global $PAGE;
+    global $DB, $PAGE;
 
     // Only add this settings item on non-site course pages.
     if (!$PAGE->course || $PAGE->course->id == SITEID) {
@@ -43,8 +43,17 @@ function tool_lifecycle_extend_navigation_course($navigation, $course, $context)
         return null;
     }
 
-    $url = null;
-    $settingnode = null;
+    $cache = cache::make('tool_lifecycle', 'application');
+    if ($cache->has('manualworkflowexists')) {
+        $manualwfexists = $cache->get('manualworkflowexists');
+    } else {
+        $manualwfexists = $DB->record_exists_select('tool_lifecycle_workflow', 'manual = 1 AND timeactive IS NOT NULL');
+        $cache->set('manualworkflowsexist', $manualwfexists);
+    }
+
+    if (!$manualwfexists) {
+        return null;
+    }
 
     $url = new moodle_url('/admin/tool/lifecycle/view.php', [
         'contextid' => $context->id,
diff --git a/version.php b/version.php
index 7fa410ae..28244903 100644
--- a/version.php
+++ b/version.php
@@ -25,7 +25,7 @@
 defined('MOODLE_INTERNAL') || die;
 
 $plugin->maturity = MATURITY_BETA;
-$plugin->version  = 2023050200;
+$plugin->version  = 2024022000;
 $plugin->component = 'tool_lifecycle';
 $plugin->requires = 2020061500; // Requires Moodle 3.9+.
 $plugin->release   = 'v4.2-r1';