mirror of
https://git.code.sf.net/p/seeddms/code
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130 lines
3.5 KiB
PHP
130 lines
3.5 KiB
PHP
<?php
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/**
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* Implementation of a simple session management.
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*
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* LetoDMS uses its own simple session management, storing sessions
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* into the database. A session holds the currently logged in user,
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* the theme and the language.
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*
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* @category DMS
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* @package LetoDMS
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* @license GPL 2
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* @version @version@
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* @author Uwe Steinmann <uwe@steinmann.cx>
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* @copyright 2011 Uwe Steinmann
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* @version Release: @package_version@
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*/
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/**
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* Class to represent a session
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*
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* This class provides some very basic methods to load, save and delete
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* sessions. It does not set or retrieve a cockie. This is up to the
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* application. The class basically provides access to the session database
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* table.
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*
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* @category DMS
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* @package LetoDMS
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* @author Markus Westphal, Malcolm Cowe, Uwe Steinmann <uwe@steinmann.cx>
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* @copyright 2011 Uwe Steinmann
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* @version Release: @package_version@
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*/
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class LetoDMS_Session {
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/**
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* @var object $db reference to database object. This must be an instance
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* of {@link LetoDMS_Core_DatabaseAccess}.
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* @access protected
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*/
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protected $db;
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/**
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* @var array $data session data
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* @access protected
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*/
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protected $data;
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/**
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* @var string $id session id
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* @access protected
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*/
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protected $id;
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/**
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* Create a new instance of the session handler
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*
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* @param object $db object to access the underlying database
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* @return object instance of LetoDMS_Session
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*/
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function __construct($db) { /* {{{ */
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$this->db = $db;
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} /* }}} */
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/**
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* Load session by its id from database
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*
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* @param string $id id of session
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* @return boolean true if successful otherwise false
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*/
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function load($id) { /* {{{ */
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$queryStr = "SELECT * FROM tblSessions WHERE id = ".$this->db->qstr($id);
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$resArr = $this->db->getResultArray($queryStr);
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if (is_bool($resArr) && $resArr == false)
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return false;
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if (count($resArr) == 0)
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return false;
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$queryStr = "UPDATE tblSessions SET lastAccess = " . mktime() . " WHERE id = " . $this->db->qstr($id);
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if (!$this->db->getResult($queryStr))
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return false;
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return $resArr[0];
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} /* }}} */
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/**
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* Create a new session and saving the given data into the database
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*
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* @param array $data data saved in session (the only fields supported
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* are userid, theme, language)
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* @return string/boolean id of session of false in case of an error
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*/
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function create($data) { /* {{{ */
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$id = "" . rand() . mktime() . rand() . "";
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$id = md5($id);
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$queryStr = "INSERT INTO tblSessions (id, userID, lastAccess, theme, language) ".
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"VALUES ('".$id."', ".$data['userid'].", ".mktime().", '".$data['theme']."', '".$data['lang']."')";
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if (!$this->db->getResult($queryStr)) {
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return false;
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}
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$this->id = $id;
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$this->data = $data;
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return $id;
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} /* }}} */
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/**
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* Delete sessions older than a given time from the database
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*
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* @param integer $sec maximum number of seconds a session may live
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* @return boolean true if successful otherwise false
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*/
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function deleteByTime($sec) { /* {{{ */
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$queryStr = "DELETE FROM tblSessions WHERE " . mktime() . " - lastAccess > ".$sec;
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if (!$this->db->getResult($queryStr)) {
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return false;
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}
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return true;
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} /* }}} */
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/**
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* Delete session by its id
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*
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* @param string $id id of session
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* @return boolean true if successful otherwise false
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*/
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function delete($id) { /* {{{ */
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$queryStr = "DELETE FROM tblSessions WHERE id = " . $this->db->qstr($id);
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if (!$this->db->getResult($queryStr)) {
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return false;
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}
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return true;
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} /* }}} */
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}
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?>
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