function trigger_get_func_value($expression, $flag, $function, $param)
{
$result = NULL;
$functionid = trigger_get_N_functionid($expression, $function);
if (isset($functionid)) {
$row = DBfetch(DBselect('select i.* from items i, functions f ' . ' where i.itemid=f.itemid and f.functionid=' . $functionid));
if ($row) {
$result = $flag == ZBX_FLAG_TRIGGER ? item_get_history($row, $param) : item_get_history($row, 0, $param);
}
}
return $result;
}
protected function resolveItemValueMacro(array $item, array $trigger)
{
$item['lastvalue'] = item_get_history($item, 0, $trigger['clock'], $trigger['ns']);
return formatItemValue($item, UNRESOLVED_MACRO_STRING);
}
/**
* Get {ITEM.VALUE} macro.
* For triggers macro is resolved in same way as {ITEM.LASTVALUE} macro. Separate methods are created for event description,
* where {ITEM.VALUE} macro resolves in different way.
*
* @param mixed $lastValue
* @param array $item
* @param array $trigger
*
* @return string
*/
protected function getItemValueMacro($lastValue, array $item, array $trigger)
{
if ($this->config === 'eventDescription') {
$value = item_get_history($item, $trigger['clock'], $trigger['ns']);
return $value === null ? UNRESOLVED_MACRO_STRING : formatHistoryValue($value, $item);
} else {
return $this->getItemLastValueMacro($lastValue, $item);
}
}
/**
* Get item macros.
*
* @param array $macros
* @param array $triggers
* @param array $macroValues
* @param bool $events resolve {ITEM.VALUE} macro using 'clock' and 'ns' fields
*
* @return array
*/
protected function getItemMacros(array $macros, array $triggers, array $macroValues, $events)
{
if ($macros) {
$functions = DbFetchArray(DBselect('SELECT f.triggerid,f.functionid,i.itemid,i.value_type,i.units,i.valuemapid' . ' FROM functions f' . ' JOIN items i ON f.itemid=i.itemid' . ' JOIN hosts h ON i.hostid=h.hostid' . ' WHERE ' . dbConditionInt('f.functionid', array_keys($macros))));
$history = Manager::History()->getLast($functions, 1, ZBX_HISTORY_PERIOD);
// False passed to DBfetch to get data without null converted to 0, which is done by default.
foreach ($functions as $func) {
foreach ($macros[$func['functionid']] as $macro => $fNums) {
$lastValue = isset($history[$func['itemid']]) ? $history[$func['itemid']][0]['value'] : null;
switch ($macro) {
case 'ITEM.LASTVALUE':
$replace = $this->getItemLastValueMacro($lastValue, $func);
break;
case 'ITEM.VALUE':
if ($events) {
$trigger = $triggers[$func['triggerid']];
$value = item_get_history($func, $trigger['clock'], $trigger['ns']);
$replace = $value === null ? UNRESOLVED_MACRO_STRING : formatHistoryValue($value, $func);
} else {
$replace = $this->getItemLastValueMacro($lastValue, $func);
}
break;
}
$macroValues = $this->getFunctionMacroValues($macroValues, $fNums, $func['triggerid'], $macro, $replace);
}
}
}
return $macroValues;
}
