YetiForceCompany/YetiForceCRM

<?php
/* +**********************************************************************************
 * The contents of this file are subject to the vtiger CRM Public License Version 1.0
 * ("License"); You may not use this file except in compliance with the License
 * The Original Code is:  vtiger CRM Open Source
 * The Initial Developer of the Original Code is vtiger.
 * Portions created by vtiger are Copyright (C) vtiger.
 * All Rights Reserved.
 * ********************************************************************************** */
Vtiger_Loader::includeOnce('~modules/com_vtiger_workflow/VTConditionalParser.php');
Vtiger_Loader::includeOnce('~modules/com_vtiger_workflow/VTParseFailed.php');

class VTConditionalExpression
{
    public function __construct($expression)
    {
        $parser = new VTConditionalParser($expression);
        $this->expTree = $parser->parse();
    }

    public function evaluate($data)
    {
        $this->env = $data;

        return $this->evalGate($this->expTree);
    }

    private function evalGate($tree)
    {
        if (\in_array($tree[0], ['and', 'or'])) {
            switch ($tree[0]) {
                case 'and':
                    return $this->evalGate($tree[1]) && $this->evalGate($tree[2]);
                case 'or':
                    return $this->evalGate($tree[1]) || $this->evalGate($tree[2]);
                default:
                    break;
            }
        } else {
            return $this->evalCondition($tree);
        }
    }

    private function evalCondition($tree)
    {
        if ('=' === $tree[0]) {
            return (int) $this->getVal($tree[1]) == (int) $this->getVal($tree[2]);
        }
    }

    private function getVal($node)
    {
        [$valueType, $value] = $node;
        switch ($valueType) {
            case 'sym':
                return $this->env[$value];
            case 'num':
                return $value;
            default:
                break;
        }
    }
}