class.ilObjLinkResourceAccess.php

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<?php

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

include_once("./Services/Object/classes/class.ilObjectAccess.php");

class ilObjLinkResourceAccess extends ilObjectAccess
{
    public static $item = array();
    public static $single_link = array();
    
    public static function _getCommands()
    {
        $commands = array(
            array("permission" => "read", "cmd" => "", "lang_var" => "show",
                "default" => true),
            array("permission" => "read", "cmd" => "exportHTML", "lang_var" => "export_html"),
            array("permission" => "write", "cmd" => "editLinks", "lang_var" => "edit_content"),
            array("permission" => "write", "cmd" => "settings", "lang_var" => "settings")
        );
        
        return $commands;
    }

    public static function _checkGoto($a_target)
    {
        global $ilAccess;
        
        $t_arr = explode("_", $a_target);

        if ($t_arr[0] != "webr" || ((int) $t_arr[1]) <= 0) {
            return false;
        }

        if ($ilAccess->checkAccess("read", "", $t_arr[1]) ||
            $ilAccess->checkAccess("visible", "", $t_arr[1])) {
            return true;
        }
        return false;
    }

    public function _checkAccess($a_cmd, $a_permission, $a_ref_id, $a_obj_id, $a_user_id = "")
    {
        global $rbacsystem;
        
        // Set offline if no valid link exists
        if ($a_permission == 'read') {
            if (!self::_getFirstLink($a_obj_id) && !$rbacsystem->checkAccessOfUser($a_user_id, 'write', $a_ref_id)) {
                return false;
            }
        }
            
        if ($a_cmd == "settings") {
            if (self::_checkDirectLink($a_obj_id)) {
                return false;
            }
        }
        return parent::_checkAccess($a_cmd, $a_permission, $a_ref_id, $a_obj_id, $a_user_id);
    }

    public static function _getFirstLink($a_webr_id)
    {
        global $ilDB;

        if (isset(self::$item[$a_webr_id])) {
            return self::$item[$a_webr_id];
        }
        $query = "SELECT * FROM webr_items " .
            "WHERE webr_id = " . $ilDB->quote($a_webr_id, 'integer') . ' ' .
            "AND active = " . $ilDB->quote(1, 'integer') . ' ';
        $res = $ilDB->query($query);
        
        while ($row = $res->fetchRow(ilDBConstants::FETCHMODE_OBJECT)) {
            $item['title']                              = $row->title;
            $item['description']                = $row->description;
            $item['target']                             = $row->target;
            $item['active']                             = (bool) $row->active;
            $item['disable_check']              = $row->disable_check;
            $item['create_date']                = $row->create_date;
            $item['last_update']                = $row->last_update;
            $item['last_check']                 = $row->last_check;
            $item['valid']                              = $row->valid;
            $item['link_id']                    = $row->link_id;
            self::$item[$row->webr_id] = $item;
        }
        return $item ? $item : array();
    }

    public static function _preloadData($a_obj_ids, $a_ref_ids)
    {
        global $ilDB, $ilUser;
        
        $res = $ilDB->query(
            "SELECT * FROM webr_items WHERE " .
                $ilDB->in("webr_id", $a_obj_ids, false, "integer") .
                " AND active = " . $ilDB->quote(1, 'integer')
        );
        foreach ($a_obj_ids as $id) {
            self::$item[$id] = array();
        }
        while ($row = $res->fetchRow(ilDBConstants::FETCHMODE_OBJECT)) {
            $item['title']                              = $row->title;
            $item['description']                = $row->description;
            $item['target']                             = $row->target;
            $item['active']                             = (bool) $row->active;
            $item['disable_check']              = $row->disable_check;
            $item['create_date']                = $row->create_date;
            $item['last_update']                = $row->last_update;
            $item['last_check']                 = $row->last_check;
            $item['valid']                              = $row->valid;
            $item['link_id']                    = $row->link_id;
            self::$item[$row->webr_id] = $item;
        }
    }

    public static function _checkDirectLink($a_obj_id)
    {
        if (isset(self::$single_link[$a_obj_id])) {
            return self::$single_link[$a_obj_id];
        }
        include_once './Modules/WebResource/classes/class.ilLinkResourceItems.php';
        return self::$single_link[$a_obj_id] = ilLinkResourceItems::_isSingular($a_obj_id);
    }
}