class.ilLicenseAccess.php

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<?php
/* Copyright (c) 1998-2009 ILIAS open source, Extended GPL, see docs/LICENSE */

class ilLicenseAccess
{

    public static function _isEnabled()
    {
        static $enabled;

        if (isset($enabled)) {
            return $enabled;
        }

        $lic_set = new ilSetting("license");
        if ($lic_set->get("license_counter")) {
            $enabled = true;

            return true;
        } else {
            $enabled = false;

            return false;
        }
    }


    public static function _checkAccess($a_usr_id, $a_obj_id)
    {
        global $ilDB;

        // check the object license
        $query = 'SELECT licenses, used FROM license_data WHERE obj_id = %s';
        $result = $ilDB->queryF($query, array( 'integer' ), array( $a_obj_id ));

        if ($row = $ilDB->fetchObject($result)) {
            // no licenses set or at least one free => grant access
            if ($row->licenses == 0 or $row->used < $row->licenses) {
                return true;
            }
        } else {
            // no license data available => access granted
            return true;
        }

        // check if user has already accessed
        $query = 'SELECT read_count FROM read_event ' . 'WHERE usr_id = %s AND obj_id = %s';

        $result = $ilDB->queryF($query, array( 'integer', 'integer' ), array( $a_usr_id, $a_obj_id ));

        if ($row = $ilDB->fetchObject($result)) {
            return true;
        }

        // all failed
        return false;
    }
}