Rewrite of session management

app/Core/Session/SessionStorage.php

@@ -0,0 +1,71 @@
+<?php
+
+namespace Kanboard\Core\Session;
+
+/**
+ * Session Storage
+ *
+ * @package  session
+ * @author   Frederic Guillot
+ *
+ * @property array  $config
+ * @property array  $user
+ * @property array  $flash
+ * @property array  $csrf
+ * @property array  $postAuth
+ * @property string $redirectAfterLogin
+ * @property string $captcha
+ * @property string $commentSorting
+ * @property bool   $hasSubtaskInProgress
+ * @property bool   $boardCollapsed
+ */
+class SessionStorage
+{
+    /**
+     * Pointer to external storage
+     *
+     * @access private
+     * @var array
+     */
+    private $storage = array();
+
+    /**
+     * Set external storage
+     *
+     * @access public
+     * @param  array  $storage  External session storage (example: $_SESSION)
+     */
+    public function setStorage(array &$storage)
+    {
+        $this->storage =& $storage;
+
+        // Load dynamically existing session variables into object properties
+        foreach ($storage as $key => $value) {
+            $this->$key = $value;
+        }
+    }
+
+    /**
+     * Get all session variables
+     *
+     * @access public
+     * @return array
+     */
+    public function getAll()
+    {
+        $session = get_object_vars($this);
+        unset($session['storage']);
+
+        return $session;
+    }
+
+    /**
+     * Copy class properties to external storage
+     *
+     * @access public
+     */
+    public function __destruct()
+    {
+        $this->storage = $this->getAll();
+    }
+}