Added session cache manager

src/AdminPanel/Cache/SessionCache.php

@@ -0,0 +1,71 @@
+<?php
+
+namespace AdminPanel\Cache;
+
+/**
+ * Session Cache (different type of cache because is per-user cache)
+ * ttl can be overriden by cookie clearing
+ *
+ * @SuppressWarnings(PHPMD.Superglobals)
+ */
+class SessionCache extends AbstractCache
+{
+    private $ttl = 86400;
+
+    public function __construct()
+    {
+        if (session_status() == PHP_SESSION_NONE) {
+            session_start();
+        }
+    }
+
+    public function get($key, $default = null)
+    {
+        if (!$this->checkKey($key)) {
+            throw new InvalidArgumentException("Invalid Key");
+        }
+        if (isset($_SESSION[$key])) {
+            $item = $_SESSION[$key];
+            if ($item["ttl"] > time() && $item["value"] !== null) {
+                return $item["value"];
+            } else {
+                $this->delete($key);
+            }
+        }
+        return $default;
+    }
+
+    public function set($key, $value, $ttl = null)
+    {
+        if (!$this->checkKey($key)) {
+            throw new InvalidArgumentException("Invalid Key");
+        }
+        $_SESSION[$key] = array(
+            "value" => $value,
+            "ttl" => time() + ($ttl != null ? $this->getTTL($ttl) : $this->ttl)
+        );
+        return true;
+    }
+
+    public function delete($key)
+    {
+        if (!$this->checkKey($key)) {
+            throw new InvalidArgumentException("Invalid Key");
+        }
+        $_SESSION[$key] = null;
+        return true;
+    }
+
+    public function clear()
+    {
+        return session_reset();
+    }
+
+    public function has($key)
+    {
+        if (!$this->checkKey($key)) {
+            throw new InvalidArgumentException("Invalid Key");
+        }
+        return isset($_SESSION[$key]) && !empty($_SESSION[$key]);
+    }
+}