--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/Loginsys.class.php	Sun May 27 02:37:55 2007 +0200
@@ -0,0 +1,102 @@
+<?php
+/**
+ * simple loginsystem for owls
+ *
+ * @brief simple loginsystem for owls
+ * @author Meillo  r e t u r n s <meillo@marmaro.de>
+ */
+class Loginsys {
+
+  /// Consts
+
+  /**
+   * time in seconds till the session expires
+   */
+  const TIME_SESSION_EXPIRES = 1800;
+
+
+
+  /// Constructors
+
+  /**
+   * starts the session
+   * and puts an activity timestamp in it
+   */
+  public function __construct() {
+    session_start();
+    $this->heartbeat();
+  }
+
+
+
+
+  /// Methods
+
+
+  /**
+   * trys to log in with the given login data
+   *
+   * @param $loginname username
+   * @param $password_md5 md5 password hash
+   */
+  public function login($loginname, $password_md5) {    // login ------------------------------------
+    $rowuser = mysql_fetch_array(mysql_query("select * from ". DB_PREFIX ."User where loginname='$loginname' and password='$password_md5' "));
+    if (mysql_affected_rows() == 1) {  // valid login
+      $_SESSION[login][id] = $rowuser[id];
+      $_SESSION[login][loginname] = $loginname;
+      $_SESSION[login][logintime] = time();
+    }
+  }
+
+
+  /**
+   * logs the user out
+   */
+  public function logout() {    // logout ------------------------------------------------------------
+    unset($_SESSION[login]);
+  }
+
+
+  /**
+   * proves if the user is logged in and if he wan't to long inactive
+   *
+   * @return bool 'true' if user is logged in, else 'false'
+   */
+  public function loggedIn() {    // return login-status ---------------------------------------------
+    return (isset($_SESSION[login][id]) && $_SESSION[login][logintime] > time()-self::TIME_SESSION_EXPIRES);
+  }
+
+
+  /**
+   * writes the current timestamp into the session
+   * this is relevant for the time of inactivity
+   */
+  public function heartbeat() {
+    if ($this->loggedIn()) {
+      $_SESSION[login][logintime] = time();
+    }
+  }
+
+
+
+  /// Getter and Setter
+
+
+  /**
+   * @return user id
+   */
+  public function getUserId() {
+    return $_SESSION[login][id];
+  }
+
+  /**
+   * @return user name
+   */
+  public function getLoginname() {
+    return $_SESSION[login][loginname];
+  }
+
+}
+
+
+?>