Added audit log interface

- Displays the currently tracked activities in the system.

Related to #2173 and #1167

app/Http/Controllers/AuditLogController.php

@@ -0,0 +1,51 @@
+<?php
+
+namespace BookStack\Http\Controllers;
+
+use BookStack\Actions\Activity;
+use Illuminate\Http\Request;
+use Illuminate\Support\Facades\DB;
+
+class AuditLogController extends Controller
+{
+
+    public function index(Request $request)
+    {
+        $this->checkPermission('settings-manage');
+        $this->checkPermission('users-manage');
+
+        $listDetails = [
+            'order' => $request->get('order', 'desc'),
+            'event' => $request->get('event', ''),
+            'sort' => $request->get('sort', 'created_at'),
+            'date_from' => $request->get('date_from', ''),
+            'date_to' => $request->get('date_to', ''),
+        ];
+
+        $query = Activity::query()
+            ->with(['entity', 'user'])
+            ->orderBy($listDetails['sort'], $listDetails['order']);
+
+        if ($listDetails['event']) {
+            $query->where('key', '=', $listDetails['event']);
+        }
+
+        if ($listDetails['date_from']) {
+            $query->where('created_at', '>=', $listDetails['date_from']);
+        }
+        if ($listDetails['date_to']) {
+            $query->where('created_at', '<=', $listDetails['date_to']);
+        }
+
+        $activities = $query->paginate(100);
+        $activities->appends($listDetails);
+
+        $keys = DB::table('activities')->select('key')->distinct()->pluck('key');
+        $this->setPageTitle(trans('settings.audit'));
+        return view('settings.audit', [
+            'activities' => $activities,
+            'listDetails' => $listDetails,
+            'activityKeys' => $keys,
+        ]);
+    }
+}