/**
* @param string $source
* @param int $pos
*
* @return int
*/
public function parse($source, $pos = 0)
{
$this->length = 0;
$this->match = '';
$this->host = '';
$this->item = '';
$this->function = '';
$p = $pos;
if (!isset($source[$p]) || $source[$p] !== '{') {
return self::PARSE_FAIL;
}
$p++;
if (!$this->parseHost($source, $p)) {
return self::PARSE_FAIL;
}
if (!isset($source[$p]) || $source[$p] !== ':') {
return self::PARSE_FAIL;
}
$p++;
$p2 = $p;
if ($this->item_key_parser->parse($source, $p) == CParser::PARSE_FAIL) {
return self::PARSE_FAIL;
}
$p += $this->item_key_parser->getLength();
// for instance, agent.ping.last(0)
if ($this->item_key_parser->getParamsNum() == 0 && isset($source[$p]) && $source[$p] == '(') {
for (; $p > $p2 && $source[$p] != '.'; $p--) {
// Code is not missing here.
}
if ($p == $p2) {
return self::PARSE_FAIL;
}
}
$p3 = $p;
if (!isset($source[$p]) || $source[$p] !== '.') {
return self::PARSE_FAIL;
}
$p++;
if ($this->function_parser->parse($source, $p) == CParser::PARSE_FAIL) {
return self::PARSE_FAIL;
}
$p += $this->function_parser->getLength();
if (!isset($source[$p]) || $source[$p] !== '}') {
return self::PARSE_FAIL;
}
$p++;
$this->length = $p - $pos;
$this->match = substr($source, $pos, $this->length);
$this->host = substr($source, $pos + 1, $p2 - $pos - 2);
$this->item = substr($source, $p2, $p3 - $p2);
$this->function = $this->function_parser->getMatch();
return isset($source[$pos + $this->length]) ? self::PARSE_SUCCESS_CONT : self::PARSE_SUCCESS;
}
/**
* Resolves macros in the trigger function parameters.
*
* @param string $function a trigger function
* @param array $macros the list of macros (['{<MACRO>}' => '<value>', ...])
* @param array $types the types of macros (see getMacroPositions() for more details)
*
* @return string
*/
protected function resolveFunctionMacros($function, array $macros, array $types)
{
$function_parser = new CFunctionParser();
if ($function_parser->parse($function) == CParser::PARSE_SUCCESS) {
$params_raw = $function_parser->getParamsRaw();
$function_chain = $params_raw['raw'];
foreach (array_reverse($params_raw['parameters']) as $param_raw) {
$param = $param_raw['raw'];
$forced = false;
switch ($param_raw['type']) {
case CFunctionParser::PARAM_QUOTED:
$param = CFunctionParser::unquoteParam($param);
$forced = true;
// break; is not missing here
// break; is not missing here
case CFunctionParser::PARAM_UNQUOTED:
$matched_macros = $this->getMacroPositions($param, $types);
foreach (array_reverse($matched_macros, true) as $pos => $macro) {
$param = substr_replace($param, $macros[$macro], $pos, strlen($macro));
}
$param = quoteFunctionParam($param, $forced);
break;
}
$function_chain = substr_replace($function_chain, $param, $param_raw['pos'], strlen($param_raw['raw']));
}
$function = substr_replace($function, $function_chain, $params_raw['pos'], strlen($params_raw['raw']));
}
return $function;
}
/**
* Parses a trigger function macro constant in the trigger expression and
* moves a current position ($this->pos) on a last symbol of the macro
*
* @return bool returns true if parsed successfully, false otherwise
*/
private function parseFunctionMacro()
{
$startPos = $this->pos;
if ($this->function_macro_parser->parse($this->expression, $this->pos) == CParser::PARSE_FAIL) {
return false;
}
if ($this->function_parser->parse($this->function_macro_parser->getFunction()) == CParser::PARSE_FAIL) {
return false;
}
$this->pos += $this->function_macro_parser->getLength() - 1;
$function_param_list = [];
for ($n = 0; $n < $this->function_parser->getParamsNum(); $n++) {
$function_param_list[] = $this->function_parser->getParam($n);
}
$this->result->addToken(CTriggerExpressionParserResult::TOKEN_TYPE_FUNCTION_MACRO, $this->function_macro_parser->getMatch(), $startPos, $this->function_macro_parser->getLength(), ['host' => $this->function_macro_parser->getHost(), 'item' => $this->function_macro_parser->getItem(), 'function' => $this->function_macro_parser->getFunction(), 'functionName' => $this->function_parser->getFunction(), 'functionParams' => $function_param_list]);
$this->expressions[] = ['expression' => $this->function_macro_parser->getMatch(), 'pos' => $startPos, 'host' => $this->function_macro_parser->getHost(), 'item' => $this->function_macro_parser->getItem(), 'function' => $this->function_macro_parser->getFunction(), 'functionName' => $this->function_parser->getFunction(), 'functionParam' => $this->function_parser->getParameters(), 'functionParamList' => $function_param_list];
return true;
}
