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<?php declare(strict_types = 0);
/*
** 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/>.
**/
/**
* Class for storing the result returned by the trigger expression parser.
*/
class CExpressionParserResult extends CParserResult {
const TOKEN_TYPE_OPEN_BRACE = 0;
const TOKEN_TYPE_CLOSE_BRACE = 1;
const TOKEN_TYPE_OPERATOR = 2;
const TOKEN_TYPE_NUMBER = 3;
const TOKEN_TYPE_MACRO = 4;
const TOKEN_TYPE_USER_MACRO = 5;
const TOKEN_TYPE_LLD_MACRO = 6;
const TOKEN_TYPE_STRING = 7;
const TOKEN_TYPE_FUNCTIONID_MACRO = 8;
const TOKEN_TYPE_HIST_FUNCTION = 9;
const TOKEN_TYPE_MATH_FUNCTION = 10;
const TOKEN_TYPE_EXPRESSION = 11;
/**
* Array of tokens.
*
* @var array
*/
protected $tokens = [];
/**
* Return the expression tokens.
*
* @see CExpressionParserResult::$token for the structure of a token array
*
* @return array
*/
public function getTokens() {
return $this->tokens;
}
/**
* Add a token to the result.
*
* @param CParserResult $token
*/
public function addTokens(array $tokens): void {
$this->tokens = array_merge($this->tokens, $tokens);
}
/**
* Auxiliary method for getTokensOfTypes().
*
* @param array $tokens
* @param array $types
*
* @return array
*/
private static function _getTokensOfTypes(array $tokens, array $types) {
$result = [];
foreach ($tokens as $token) {
if (in_array($token['type'], $types)) {
$result[] = $token;
}
if ($token['type'] == CExpressionParserResult::TOKEN_TYPE_EXPRESSION) {
$result = array_merge($result, self::_getTokensOfTypes($token['data']['tokens'], $types));
}
elseif ($token['type'] == CExpressionParserResult::TOKEN_TYPE_MATH_FUNCTION) {
foreach ($token['data']['parameters'] as $parameter) {
$result = array_merge($result, self::_getTokensOfTypes($parameter['data']['tokens'], $types));
}
}
}
return $result;
}
/**
* Returns all tokens include nested of the given types.
*
* @param array $types
*
* @return array
*/
public function getTokensOfTypes(array $types): array {
return self::_getTokensOfTypes($this->tokens, $types);
}
/**
* Return list hosts found in parsed trigger expression.
*
* @return array
*/
public function getHosts(): array {
$hist_functions = $this->getTokensOfTypes([CExpressionParserResult::TOKEN_TYPE_HIST_FUNCTION]);
$hosts = [];
foreach ($hist_functions as $hist_function) {
$host = $hist_function['data']['parameters'][0]['data']['host'];
$hosts[$host] = $host;
}
return array_values($hosts);
}
}
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