Zabbix

<?php

/*

** Zabbix

** Copyright (C) 2001-2022 Zabbix SIA

**

** This program is free software; you can redistribute it and/or modify

** it under the terms of the GNU General Public License as published by

** the Free Software Foundation; either version 2 of the License, or

** (at your option) any later version.

**

** 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 General Public License for more details.

**

** You should have received a copy of the GNU General Public License

** along with this program; if not, write to the Free Software

** Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.

**/

​

​

/**

 * A class for creating conditions.

 */

class CConditionHelper {

​

    /**

     * Generate a numeric formula from conditions $conditions with respect to evaluation type $evalType.

     * Each condition must have a condition type, that will be used for grouping.

     *

     * Supported $evalType values:

     * - CONDITION_EVAL_TYPE_AND_OR

     * - CONDITION_EVAL_TYPE_AND

     * - CONDITION_EVAL_TYPE_OR

     *

     * Example:

     * echo CFormulaHelper::getFormula(array(

     *  1 => 'condition1',

     *  2 => 'condition1',

     *  5 => 'condition2'

     * ), CONDITION_EVAL_TYPE_AND_OR);

     *

     * // ({1} or {2}) and {5}

     *

     * Keep in sync with JS getConditionFormula().

     *

     * @param array $conditions     conditions with IDs as keys and condition type with values

     * @param int   $evalType

     *

     * @return string

     */

    public static function getFormula(array $conditions, $evalType) {

        $groupedConditions = [];

        foreach ($conditions as $id => $condition) {

            $groupedConditions[$condition][] = '{'.$id.'}';

        }

​

        // operators

        switch ($evalType) {

            case CONDITION_EVAL_TYPE_AND:

                $conditionOperator = 'and';

                $groupOperator = $conditionOperator;

                break;