From f678200d8e231f041d3076fdd25dd5be20727c8b Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Niels=20Gandra=C3=9F?= <niels@gandrass.de>
Date: Mon, 8 Jan 2024 11:46:48 +0100
Subject: [PATCH] Fix locking of archive retention time job preset

---
 classes/form/archive_quiz_form.php | 28 ++++++++++++++++++++--------
 classes/local/util.php             | 24 ++++++++++++++++++++++++
 2 files changed, 44 insertions(+), 8 deletions(-)

diff --git a/classes/form/archive_quiz_form.php b/classes/form/archive_quiz_form.php
index 40af6e9..75f40fd 100644
--- a/classes/form/archive_quiz_form.php
+++ b/classes/form/archive_quiz_form.php
@@ -25,6 +25,7 @@
 namespace quiz_archiver\form;
 
 use quiz_archiver\ArchiveJob;
+use quiz_archiver\local\util;
 use quiz_archiver\Report;
 
 defined('MOODLE_INTERNAL') || die();
@@ -200,15 +201,26 @@ public function definition() {
         $mform->addHelpButton('archive_autodelete', 'archive_autodelete', 'quiz_archiver');
         $mform->setDefault('archive_autodelete', $config->job_preset_archive_autodelete);
 
-        $mform->addElement(
-            'duration',
-            'archive_retention_time',
-            get_string('archive_retention_time', 'quiz_archiver'),
-            ['optional' => false, 'defaultunit' => DAYSECS],
-            $config->job_preset_archive_retention_time_locked ? 'disabled' : null
-        );
+        if ($config->job_preset_archive_retention_time_locked) {
+            $durationwithunit = util::duration_to_unit($config->job_preset_archive_retention_time);
+            $mform->addElement(
+                'static',
+                'archive_retention_time_static',
+                get_string('archive_retention_time', 'quiz_archiver'),
+                $durationwithunit[0].' '.$durationwithunit[1]
+            );
+            $mform->addElement('hidden', 'archive_retention_time', $config->job_preset_archive_retention_time);
+        } else {
+            $mform->addElement(
+                'duration',
+                'archive_retention_time',
+                get_string('archive_retention_time', 'quiz_archiver'),
+                ['optional' => false, 'defaultunit' => DAYSECS],
+            );
+            $mform->setDefault('archive_retention_time', $config->job_preset_archive_retention_time);
+        }
+        $mform->setType('archive_retention_time', PARAM_INT);
         $mform->addHelpButton('archive_retention_time', 'archive_retention_time', 'quiz_archiver');
-        $mform->setDefault('archive_retention_time', $config->job_preset_archive_retention_time);
         $mform->hideIf('archive_retention_time', 'archive_autodelete', 'notchecked');
 
         // Submit
diff --git a/classes/local/util.php b/classes/local/util.php
index a002b6f..9a07e97 100644
--- a/classes/local/util.php
+++ b/classes/local/util.php
@@ -64,4 +64,28 @@ public static function duration_to_human_readable(int $duration): string {
         return trim($humanreadable);
     }
 
+    /**
+     * Expresses a duration in seconds as the largest possible unit.
+     *
+     * @param int $duration Duration in seconds
+     * @return array Containing the value (idx: 0) and the unit (idx: 1)
+     * @throws \coding_exception
+     */
+    public static function duration_to_unit(int $duration): array {
+        if (fmod($duration, WEEKSECS) == 0) {
+            return [$duration / WEEKSECS, get_string('weeks')];
+        }
+        if (fmod($duration, DAYSECS) == 0) {
+            return [$duration / DAYSECS, get_string('days')];
+        }
+        if (fmod($duration, HOURSECS) == 0) {
+            return [$duration / HOURSECS, get_string('hours')];
+        }
+        if (fmod($duration, MINSECS) == 0) {
+            return [$duration / MINSECS, get_string('minutes')];
+        }
+
+        return [$duration, get_string('seconds')];
+    }
+
 }
\ No newline at end of file