From e67b28357ce04e1c2af8cf8a07d66159e44ba73a Mon Sep 17 00:00:00 2001
From: Jan-Hendrik Willms <tleilax+studip@gmail.com>
Date: Wed, 31 Aug 2022 07:12:28 +0000
Subject: transfer CourseHistory plugin into main, fixes #1497

Closes #1497

Merge request studip/studip!936
---
 app/controllers/course/history.php | 49 ++++++++++++++++++++++++++++++++++++++
 app/views/course/history/index.php | 45 ++++++++++++++++++++++++++++++++++
 lib/modules/CoreOverview.class.php |  3 +++
 3 files changed, 97 insertions(+)
 create mode 100644 app/controllers/course/history.php
 create mode 100644 app/views/course/history/index.php

diff --git a/app/controllers/course/history.php b/app/controllers/course/history.php
new file mode 100644
index 0000000..9a8e4e9
--- /dev/null
+++ b/app/controllers/course/history.php
@@ -0,0 +1,49 @@
+<?php
+final class Course_HistoryController extends AuthenticatedController
+{
+    public function before_filter(&$action, &$args)
+    {
+        parent::before_filter($action, $args);
+
+        if (!Context::isCourse()) {
+            throw new Exception('History view is only available for courses');
+        }
+        if (!$GLOBALS['perm']->have_studip_perm('admin', Context::getId())) {
+            throw new AccessDeniedException();
+        }
+
+        Navigation::activateItem('/course/main/history');
+        PageLayout::setTitle(_('Änderungsverlauf'));
+    }
+
+    public function index_action()
+    {
+        $this->history = $this->getHistory(Context::get());
+    }
+
+    private function getHistory(Course $course): array
+    {
+        $result = [];
+        LogEvent::findEachBySQL(
+            function (LogEvent $event) use (&$result) {
+                if (!isset($result[$event->action_id])) {
+                    $result[$event->action_id] = [
+                        'name'   => "{$event->action->name}: {$event->action->description}",
+                        'events' => [],
+                    ];
+                }
+
+                $result[$event->action_id]['events'][] = $event;
+            },
+            "? IN (affected_range_id, coaffected_range_id, user_id) ORDER BY mkdate DESC",
+            [$course->id]
+        );
+
+        $result = array_values($result);
+        usort($result, function ($a, $b) {
+            return strcasecmp($a['name'], $b['name']);
+        });
+
+        return $result;
+    }
+}
diff --git a/app/views/course/history/index.php b/app/views/course/history/index.php
new file mode 100644
index 0000000..42deca9
--- /dev/null
+++ b/app/views/course/history/index.php
@@ -0,0 +1,45 @@
+<?php
+$sanitizeEvent = function (LogEvent $event) {
+    $info = preg_replace('/chdate:\s+(\d+)\s+=&gt;\s+(\d+)/', '', $event->formatEvent());
+    $info = str_replace('admission_turnout', _('max. Teilnehmerzahl'), $info);
+    $info = str_replace('=&gt;', '&rarr;', $info);
+
+    return $info;
+
+};
+?>
+<? if (!$history): ?>
+    <?= MessageBox::info(_('Es konnten keine Logeinträge gefunden werden.'))->hideClose() ?>
+<? else: ?>
+    <table class="default collapsable">
+        <colgroup>
+            <col style="width: 150px">
+            <col>
+        </colgroup>
+    <? foreach ($history as $index => $type): ?>
+        <tbody <? if ($index > 0) echo 'class="collapsed"'; ?>>
+            <tr class="header-row">
+                <th colspan="2" class="toggle-indicator">
+                    <a class="toggler">
+                        <?= htmlReady($type['name']) ?>
+                    </a>
+                </th>
+            </tr>
+        <? foreach ($type['events'] as $event): ?>
+            <tr>
+                <td><?= strftime('%x %X', $event->mkdate) ?></td>
+                <td>
+                    <?= $sanitizeEvent($event) ?>
+                <? if ($event->info && $GLOBALS['perm']->have_perm('root')): ?>
+                    <br><?= _('Info') ?>: <?= htmlReady($event->info) ?>
+                <? endif ?>
+                <? if ($event->dbg_info && $GLOBALS['perm']->have_perm('root')): ?>
+                    <br><?= _('Debug') ?>: <?= htmlReady($event->dbg_info) ?>
+                <? endif ?>
+                </td>
+            </tr>
+        <? endforeach ?>
+        </tbody>
+    <? endforeach ?>
+    </table>
+<? endif; ?>
diff --git a/lib/modules/CoreOverview.class.php b/lib/modules/CoreOverview.class.php
index 39145ae..fff3050 100644
--- a/lib/modules/CoreOverview.class.php
+++ b/lib/modules/CoreOverview.class.php
@@ -100,6 +100,9 @@ class CoreOverview extends CorePlugin implements StudipModule
             if (!$sem_class['studygroup_mode']) {
                 $navigation->addSubNavigation('details', new Navigation(_('Details'), 'dispatch.php/course/details/'));
             }
+            if ($GLOBALS['perm']->have_studip_perm('admin', $course_id)) {
+                $navigation->addSubNavigation('history', new Navigation(_('Änderungsverlauf'), 'dispatch.php/course/history'));
+            }
         }
         return ['main' => $navigation];
     }
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