function str_replace_first($search, $replace, $subject)
{
$pos = zbx_strpos($subject, $search);
if ($pos !== false) {
$subject = zbx_substr_replace($subject, $replace, $pos, zbx_strlen($search));
}
return $subject;
}
/**
* Replace macros in trigger description by values.
* All macros are resolved in one go.
*
* @param array $trigger
* @param array $macroValues
*
* @return array
*/
protected function replaceMacroValues(array $trigger, array $macroValues)
{
$macroBegin = false;
for ($i = 0; $i < zbx_strlen($trigger['description']); $i++) {
$c = zbx_substr($trigger['description'], $i, 1);
switch ($c) {
case '{':
$macroBegin = $i;
break;
case '}':
if ($macroBegin !== false) {
$macro = zbx_substr($trigger['description'], $macroBegin, $i - $macroBegin + 1);
if (isset($macroValues[$macro])) {
$replace = $macroValues[$macro];
} elseif ($this->isAllowedMacro($macro)) {
$replace = UNRESOLVED_MACRO_STRING;
} else {
$replace = false;
}
if ($replace !== false) {
$trigger['description'] = zbx_substr_replace($trigger['description'], $replace, $macroBegin, zbx_strlen($macro));
// - 1 because for loop adds 1 on next iteration
$i = $macroBegin + zbx_strlen($replace) - 1;
$macroBegin = false;
}
}
break;
}
}
return $trigger;
}
