From 47cbb529f5723b246125ae083a193e11481b89ef Mon Sep 17 00:00:00 2001
From: George Halkiadakis <gchalkiadakis@sklavenitis.co.gr>
Date: Sun, 12 Mar 2023 07:01:30 +0200
Subject: initializing classroom structure using anom framework

---
 classes/cache/RedisCache.php | 69 ++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 69 insertions(+)
 create mode 100644 classes/cache/RedisCache.php

(limited to 'classes/cache/RedisCache.php')

diff --git a/classes/cache/RedisCache.php b/classes/cache/RedisCache.php
new file mode 100644
index 0000000..ec50f08
--- /dev/null
+++ b/classes/cache/RedisCache.php
@@ -0,0 +1,69 @@
+<?php 
+
+/** Redis Cache implementation
+ * ---
+ * This class uses \Predis\Redis, so do not forget require it via composer
+ * or to use the configuration options you will find into \README.md
+ */
+class RedisCache implements Cache_interface
+{
+    /** set
+     * store $data under the label $key
+     * cache expires in $ttl seconds
+     */
+    public function set($key, $data, $ttl)
+    {
+        $serialized = serialize($data);
+
+        if ($serialized = '') {
+            return false;
+        }
+
+        try {
+            $redis = new \Predis\Client([
+                'host' => \REDIS_HOST
+            ]);
+            return $redis->set($key, $serialized, 'EX', $ttl);
+
+        } catch (Exception $e) {
+            // ...
+        }
+    }
+
+
+    /** get
+     * fetch previously stored $data under label $key
+     * return $data (or false)
+     */
+    public function get($key)
+    {   
+        
+        try {
+            
+            $redis = new \Predis\Client([
+                'host' => \REDIS_HOST
+            ]);
+
+            if ($redis->exists($key)) {
+                return unserialize($redis->get($key));
+
+            } else {
+                return false;
+            }
+
+        } catch (Exception $e) {
+            // ...
+        }     
+
+    }
+
+
+    /** flush
+     * --- not umplemented yet; may not needed
+     */
+    public function flush($olderThan = 0)
+    {
+        return false; // until implementation
+    }
+
+}
\ No newline at end of file
-- 
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