From 228da728257c2f2c4e059c8d0e5fef5f4ae2e36c Mon Sep 17 00:00:00 2001
From: Lukas Schauer
Date: Sun, 27 Dec 2020 14:58:55 +0100
Subject: add the worlds most ugliest caching code

---
 index.php          | 1 +
 model/Schedule.php | 9 +++++++++
 2 files changed, 10 insertions(+)

diff --git a/index.php b/index.php
index 1c0df61..35db28f 100644
--- a/index.php
+++ b/index.php
@@ -70,6 +70,7 @@ try {
 	$route = rtrim($route, '/');
 
 	$GLOBALS['forceopen'] = isset($_GET['forceopen']);
+	$GLOBALS['regenschedcache'] = isset($_GET['regenschedcache']) && !isset($_SERVER['HTTP_X_REAL_IP']);
 
 	// generic template
 	$tpl = new PhpTemplate('template/page.phtml');
diff --git a/model/Schedule.php b/model/Schedule.php
index 52eac4e..5419136 100644
--- a/model/Schedule.php
+++ b/model/Schedule.php
@@ -72,6 +72,11 @@ class Schedule
 
 	public function getSchedule()
 	{
+		$cachefile = sprintf('/tmp/getschedule-cache-%s.cache', $this->getConference()->getSlug());
+		if(file_exists($cachefile) && !$GLOBALS['regenschedcache']) {
+			return unserialize(file_get_contents($cachefile));
+		}
+
 		// download schedule-xml
 		$schedule = $this->fetchSchedule();
 
@@ -261,6 +266,10 @@ class Schedule
 			});
 		}
 
+		if($GLOBALS['regenschedcache']) {
+			file_put_contents($cachefile, serialize($program));
+		}
+
 		return $program;
 	}
 
-- 
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