From 68c5453cdb24ba8b56457cde8cc083ef4efdb04b Mon Sep 17 00:00:00 2001
From: Jeffrey Li <jeffrey@vectorwyse.com>
Date: Mon, 6 Jul 2020 20:45:21 -0400
Subject: [PATCH] Support session database

---
 README.md                                      |  4 ++++
 .../DatabaseSessionChecker.php                 | 18 ++++++++++++++++++
 src/TimeoutCalculator/TimeoutCalculator.php    |  5 +++--
 3 files changed, 25 insertions(+), 2 deletions(-)
 create mode 100644 src/TimeoutCalculator/DatabaseSessionChecker.php

diff --git a/README.md b/README.md
index f207846..cd1fd56 100644
--- a/README.md
+++ b/README.md
@@ -7,6 +7,10 @@ When the session is about to expire, show a dialog so the user can choose not to
 
 ![](screenshot.png)
 
+## How it works
+
+This code doesn't actually log the user out. It still relies on Laravel's mechanism for expiring sessions. All it does is periodically check how much time before the session will expire and alert the user when it is almost time.
+
 ## Installation
 
 Laravel package and NPM dependencies
diff --git a/src/TimeoutCalculator/DatabaseSessionChecker.php b/src/TimeoutCalculator/DatabaseSessionChecker.php
new file mode 100644
index 0000000..d7edd72
--- /dev/null
+++ b/src/TimeoutCalculator/DatabaseSessionChecker.php
@@ -0,0 +1,18 @@
+<?php
+
+namespace Vectorwyse\IdleTimeoutAlert\TimeoutCalculator;
+
+use Illuminate\Support\Facades\DB;
+
+class DatabaseSessionChecker extends SessionChecker
+{
+    public function getLastModified()
+    {
+        $session = DB::table('sessions')->where('id', $this->sessionId)->first();
+        if (!$session) {
+            throw new TimeoutCalculatorException('Session not found');
+        }
+
+        return $session->last_activity;
+    }
+}
diff --git a/src/TimeoutCalculator/TimeoutCalculator.php b/src/TimeoutCalculator/TimeoutCalculator.php
index a546bae..1c3376e 100644
--- a/src/TimeoutCalculator/TimeoutCalculator.php
+++ b/src/TimeoutCalculator/TimeoutCalculator.php
@@ -25,8 +25,9 @@ public static function getSecondsLeft(Request $request)
         $sessionId = Crypt::decryptString($request->cookie('laravel_session'));
         
         switch (config('session.driver')) {
-            case 'file':    $checker = new FileSessionChecker($sessionId);  break;
-            default:        throw new TimeoutCalculatorException('Session driver not supported');
+            case 'database':    $checker = new DatabaseSessionChecker($sessionId);  break;
+            case 'file':        $checker = new FileSessionChecker($sessionId);      break;
+            default:            throw new TimeoutCalculatorException('Session driver not supported');
         }
 
         $secondsSince = time() - $checker->getLastModified();