/**
* Implodes expression, replaces names and keys with IDs.
*
* Fro example: localhost:procload.last(0)>10 will translated to {12}>10 and created database representation.
*
* @throws Exception if error occureed
*
* @param string $expression Full expression with host names and item keys
* @param numeric $triggerid
* @param array optional $hostnames Reference to array which will be filled with unique visible host names.
*
* @return string Imploded expression (names and keys replaced by IDs)
*/
function implode_exp($expression, $triggerId, &$hostnames = array())
{
$expressionData = new CTriggerExpression();
if (!$expressionData->parse($expression)) {
throw new Exception($expressionData->error);
}
$newFunctions = array();
$functions = array();
$items = array();
$triggerFunctionValidator = new CTriggerFunctionValidator();
foreach ($expressionData->expressions as $exprPart) {
if (isset($newFunctions[$exprPart['expression']])) {
continue;
}
if (!isset($items[$exprPart['host']][$exprPart['item']])) {
$result = DBselect('SELECT i.itemid,i.value_type,h.name' . ' FROM items i,hosts h' . ' WHERE i.key_=' . zbx_dbstr($exprPart['item']) . ' AND ' . dbConditionInt('i.flags', array(ZBX_FLAG_DISCOVERY_NORMAL, ZBX_FLAG_DISCOVERY_CREATED, ZBX_FLAG_DISCOVERY_PROTOTYPE)) . ' AND h.host=' . zbx_dbstr($exprPart['host']) . ' AND h.hostid=i.hostid' . andDbNode('i.itemid'));
if ($row = DBfetch($result)) {
$hostnames[] = $row['name'];
$items[$exprPart['host']][$exprPart['item']] = array('itemid' => $row['itemid'], 'valueType' => $row['value_type']);
} else {
throw new Exception(_s('Incorrect item key "%1$s" provided for trigger expression on "%2$s".', $exprPart['item'], $exprPart['host']));
}
}
if (!$triggerFunctionValidator->validate(array('function' => $exprPart['function'], 'functionName' => $exprPart['functionName'], 'functionParamList' => $exprPart['functionParamList'], 'valueType' => $items[$exprPart['host']][$exprPart['item']]['valueType']))) {
throw new Exception($triggerFunctionValidator->getError());
}
$newFunctions[$exprPart['expression']] = 0;
$functions[] = array('itemid' => $items[$exprPart['host']][$exprPart['item']]['itemid'], 'triggerid' => $triggerId, 'function' => $exprPart['functionName'], 'parameter' => $exprPart['functionParam']);
}
$functionIds = DB::insert('functions', $functions);
$num = 0;
foreach ($newFunctions as &$newFunction) {
$newFunction = $functionIds[$num++];
}
unset($newFunction);
$exprPart = end($expressionData->expressions);
do {
$expression = substr_replace($expression, '{' . $newFunctions[$exprPart['expression']] . '}', $exprPart['pos'], strlen($exprPart['expression']));
} while ($exprPart = prev($expressionData->expressions));
$hostnames = array_unique($hostnames);
return $expression;
}
}
if ($data['paramtype'] == PARAM_TYPE_TIME && in_array($data['function'], array('last', 'band', 'strlen'))) {
$data['param'][0] = '';
}
// quote function param
$params = array();
foreach ($data['param'] as $param) {
$params[] = quoteFunctionParam($param);
}
$data['expression'] = sprintf('{%s:%s.%s(%s)}%s%s', $data['item_host'], $data['item_key'], $data['function'], rtrim(implode(',', $params), ','), $data['operator'], $data['value']);
// validate trigger expression
$triggerExpression = new CTriggerExpression();
if ($triggerExpression->parse($data['expression'])) {
$expressionData = reset($triggerExpression->expressions);
// validate trigger function
$triggerFunctionValidator = new CTriggerFunctionValidator();
$isValid = $triggerFunctionValidator->validate(array('function' => $expressionData['function'], 'functionName' => $expressionData['functionName'], 'functionParamList' => $expressionData['functionParamList'], 'valueType' => $data['itemValueType']));
if (!$isValid) {
unset($data['insert']);
throw new Exception($triggerFunctionValidator->getError());
}
} else {
unset($data['insert']);
throw new Exception($triggerExpression->error);
}
// quote function param
if (isset($data['insert'])) {
foreach ($data['param'] as $pnum => $param) {
$data['param'][$pnum] = quoteFunctionParam($param);
}
}
