function check_right_on_trigger_by_expression($permission, $expression)
{
$expressionData = new CTriggerExpression();
if (!$expressionData->parse($expression)) {
error($expressionData->error);
return false;
}
$expressionHosts = $expressionData->getHosts();
$hosts = API::Host()->get(array('filter' => array('host' => $expressionHosts), 'editable' => $permission == PERM_READ_WRITE ? 1 : null, 'output' => array('hostid', 'host'), 'templated_hosts' => true, 'preservekeys' => true));
$hosts = zbx_toHash($hosts, 'host');
foreach ($expressionHosts as $host) {
if (!isset($hosts[$host])) {
error(_s('Incorrect trigger expression. Host "%1$s" does not exist or you have no access to this host.', $host));
return false;
}
}
return true;
}
/**
* Returns true if the given expression contains templates.
*
* @param CTriggerExpression $exp
*
* @return bool
*/
protected function expressionHasTemplates(CTriggerExpression $expressionData)
{
$hosts = API::Host()->get(['output' => ['status'], 'filter' => ['name' => $expressionData->getHosts()], 'templated_hosts' => true]);
foreach ($hosts as $host) {
if ($host['status'] == HOST_STATUS_TEMPLATE) {
return true;
}
}
return false;
}
/**
* Checks that no trigger with the same description and expression as $trigger exist on the given host.
* Assumes the given trigger is valid.
*
* @throws APIException if at least one trigger exists
*
* @param array $trigger a trigger with an exploded expression
* @param null $hostid
*
* @return void
*/
protected function checkIfExistsOnHost(array $trigger, $hostId = null)
{
// skip the check if the description and expression haven't been changed
if (!isset($trigger['description']) && !isset($trigger['expression'])) {
return;
}
// make sure we have all the required data
if (!isset($trigger['description']) || !isset($trigger['expression'])) {
$explodeExpression = !isset($trigger['expression']);
$trigger = $this->extendObject($this->tableName(), $trigger, array('description', 'expression'));
if ($explodeExpression) {
$trigger['expression'] = explode_exp($trigger['expression']);
}
}
$filter = array('description' => $trigger['description']);
if ($hostId) {
$filter['hostid'] = $hostId;
} else {
$expressionData = new CTriggerExpression($trigger['expression']);
$expressionData->parse($trigger['expression']);
$expressionHosts = $expressionData->getHosts();
$filter['host'] = reset($expressionHosts);
}
$triggers = $this->get(array('filter' => $filter, 'output' => array('expression', 'triggerid'), 'nopermissions' => true));
foreach ($triggers as $dbTrigger) {
$tmpExp = explode_exp($dbTrigger['expression']);
// check if the expressions are also equal and that this is a different trigger
$differentTrigger = !isset($trigger['triggerid']) || !idcmp($trigger['triggerid'], $dbTrigger['triggerid']);
if (strcmp($tmpExp, $trigger['expression']) == 0 && $differentTrigger) {
$options = array('output' => array('name'), 'templated_hosts' => true, 'nopermissions' => true, 'limit' => 1);
if (isset($filter['host'])) {
$options['filter'] = array('host' => $filter['host']);
} else {
$options['hostids'] = $hostId;
}
$host = API::Host()->get($options);
$host = reset($host);
self::exception(ZBX_API_ERROR_PARAMETERS, _s('Trigger "%1$s" already exists on "%2$s".', $trigger['description'], $host['name']));
}
}
}
/**
* Checks if trigger prototype is in valid state. Checks trigger expression.
*
* @param array $triggerPrototype
*
* @return void
*/
protected function validateTriggerPrototypeExpression(array $triggerPrototype)
{
$triggerExpression = new CTriggerExpression();
if (!$triggerExpression->parse($triggerPrototype['expression'])) {
self::exception(ZBX_API_ERROR_PARAMETERS, $triggerExpression->error);
}
$expressionHostnames = $triggerExpression->getHosts();
$this->checkTemplatesAndHostsTogether($expressionHostnames);
$triggerExpressionItems = getExpressionItems($triggerExpression);
$this->checkDiscoveryRuleCount($triggerPrototype, $triggerExpressionItems);
}
