class.ilSessionIStorage.php

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<?php

/* Copyright (c) 1998-2012 ILIAS open source, Extended GPL, see docs/LICENSE */

class ilSessionIStorage
{
    protected $session_id = "";
    protected $component_id = "";
    protected static $values = array();
    
    public function __construct($a_component_id, $a_sess_id = "")
    {
        $this->component_id = $a_component_id;
        if ($a_sess_id != "") {
            $this->session_id = $a_sess_id;
        } else {
            $this->session_id = session_id();
        }
    }
    
    public function set($a_key, $a_val)
    {
        global $ilDB;
        
        if (!is_array(self::$values[$this->component_id])) {
            self::$values[$this->component_id] = array();
        }
        self::$values[$this->component_id][$a_key] = $a_val;
        $ilDB->replace(
            "usr_sess_istorage",
            array(
                "session_id" => array("text", $this->session_id),
                "component_id" => array("text", $this->component_id),
                "vkey" => array("text", $a_key)
                ),
            array("value" => array("text", $a_val))
        );
    }
    
    public function get($a_key)
    {
        global $ilDB;
        
        if (is_array(self::$values[$this->component_id]) &&
            isset(self::$values[$this->component_id][$a_key])) {
            return self::$values[$this->component_id][$a_key];
        }
        
        $set = $ilDB->query(
            "SELECT value FROM usr_sess_istorage " .
            " WHERE session_id = " . $ilDB->quote($this->session_id, "text") .
            " AND component_id = " . $ilDB->quote($this->component_id, "text") .
            " AND vkey = " . $ilDB->quote($a_key, "text")
        );
        $rec = $ilDB->fetchAssoc($set);
        self::$values[$this->component_id][$a_key] = $rec["value"];

        return $rec["value"];
    }
    
    public static function destroySession($a_session_id)
    {
        global $ilDB;
        
        if (!is_array($a_session_id)) {
            $q = "DELETE FROM usr_sess_istorage WHERE session_id = " .
                $ilDB->quote($a_session_id, "text");
        } else {
            $q = "DELETE FROM usr_sess_istorage WHERE " .
                $ilDB->in("session_id", $a_session_id, "", "text");
        }

        $ilDB->manipulate($q);
    }
}