Zabbix

<?php

/*

** Copyright (C) 2001-2025 Zabbix SIA

**

** This program is free software: you can redistribute it and/or modify it under the terms of

** the GNU Affero General Public License as published by the Free Software Foundation, version 3.

**

** This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;

** without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

** See the GNU Affero General Public License for more details.

**

** You should have received a copy of the GNU Affero General Public License along with this program.

** If not, see <https://www.gnu.org/licenses/>.

**/

​

​

/**

 * Validate only trigger event name field expression macros, other macros will be ignored.

 */

class CEventNameValidator extends CValidator {

​

    /**

     * Returns true if the given $value is valid, or set's an error and returns false otherwise.

     *

     * @param $value

     *

     * @return bool

     */

    public function validate($value) {

        $p = 0;

        $expr_macro = new CExpressionMacroParser([

            'usermacros' => true,

            'lldmacros' => true,

            'host_macro_n' => true,

            'empty_host' => true

        ]);

        $expr_func_macro = new CExpressionMacroFunctionParser([

            'usermacros' => true,

            'lldmacros' => true,

            'host_macro_n' => true,

            'empty_host' => true

        ]);

​

        while (isset($value[$p])) {

            if (substr($value, $p, 3) === '{{?') {

                if ($expr_func_macro->parse($value, $p) != CParser::PARSE_FAIL) {

                    $p += $expr_func_macro->getLength();

​

                    continue;

                }

                $p++;

            }

​

            if (substr($value, $p, 2) === '{?') {

                if ($expr_macro->parse($value, $p) == CParser::PARSE_FAIL) {

                    $this->setError($expr_macro->getError());

​

                    return false;

                }

​

                $p += $expr_macro->getLength();

​

                continue;

            }

​

            $p++;

        }

​

        return true;

    }

}