/**
* Deletes discovery rules and prototypes from DB that are missing in XML.
*
* @return null
*/
protected function deleteMissingDiscoveryRules()
{
if (!$this->options['discoveryRules']['deleteMissing']) {
return;
}
$processedHostIds = $this->importedObjectContainer->getHostIds();
$processedTemplateIds = $this->importedObjectContainer->getTemplateIds();
$processedHostIds = array_merge($processedHostIds, $processedTemplateIds);
// no hosts or templates have been processed
if (!$processedHostIds) {
return;
}
$discoveryRuleIdsXML = array();
$allDiscoveryRules = $this->getFormattedDiscoveryRules();
if ($allDiscoveryRules) {
foreach ($allDiscoveryRules as $host => $discoveryRules) {
$hostId = $this->referencer->resolveHostOrTemplate($host);
foreach ($discoveryRules as $discoveryRule) {
$discoveryRuleId = $this->referencer->resolveItem($hostId, $discoveryRule['key_']);
if ($discoveryRuleId) {
$discoveryRuleIdsXML[$discoveryRuleId] = $discoveryRuleId;
}
}
}
}
$dbDiscoveryRuleIds = API::DiscoveryRule()->get(array('output' => array('itemid'), 'hostids' => $processedHostIds, 'preservekeys' => true, 'nopermissions' => true, 'inherited' => false));
$discoveryRulesToDelete = array_diff_key($dbDiscoveryRuleIds, $discoveryRuleIdsXML);
if ($discoveryRulesToDelete) {
API::DiscoveryRule()->delete(array_keys($discoveryRulesToDelete));
}
// refresh discovery rules because templated ones can be inherited to host and used for prototypes
$this->referencer->refreshItems();
$hostPrototypeIdsXML = array();
$triggerPrototypeIdsXML = array();
$itemPrototypeIdsXML = array();
$graphPrototypeIdsXML = array();
foreach ($allDiscoveryRules as $host => $discoveryRules) {
$hostId = $this->referencer->resolveHostOrTemplate($host);
foreach ($discoveryRules as $discoveryRule) {
$discoveryRuleId = $this->referencer->resolveItem($hostId, $discoveryRule['key_']);
if ($discoveryRuleId) {
// gather host prototype IDs to delete
foreach ($discoveryRule['host_prototypes'] as $hostPrototype) {
$hostPrototypeId = $this->referencer->resolveHostPrototype($hostId, $discoveryRuleId, $hostPrototype['host']);
if ($hostPrototypeId) {
$hostPrototypeIdsXML[$hostPrototypeId] = $hostPrototypeId;
}
}
// gather trigger prototype IDs to delete
foreach ($discoveryRule['trigger_prototypes'] as $triggerPrototype) {
$triggerPrototypeId = $this->referencer->resolveTrigger($triggerPrototype['description'], $triggerPrototype['expression']);
if ($triggerPrototypeId) {
$triggerPrototypeIdsXML[$triggerPrototypeId] = $triggerPrototypeId;
}
}
// gather graph prototype IDs to delete
foreach ($discoveryRule['graph_prototypes'] as $graphPrototype) {
$graphPrototypeId = $this->referencer->resolveGraph($hostId, $graphPrototype['name']);
if ($graphPrototypeId) {
$graphPrototypeIdsXML[$graphPrototypeId] = $graphPrototypeId;
}
}
// gather item prototype IDs to delete
foreach ($discoveryRule['item_prototypes'] as $itemPrototype) {
$itemPrototypeId = $this->referencer->resolveItem($hostId, $itemPrototype['key_']);
if ($itemPrototypeId) {
$itemPrototypeIdsXML[$itemPrototypeId] = $itemPrototypeId;
}
}
}
}
}
// delete missing host prototypes
$dbHostPrototypeIds = API::HostPrototype()->get(array('output' => array('hostid'), 'discoveryids' => $discoveryRuleIdsXML, 'preservekeys' => true, 'nopermissions' => true, 'inherited' => false));
$hostPrototypesToDelete = array_diff_key($dbHostPrototypeIds, $hostPrototypeIdsXML);
if ($hostPrototypesToDelete) {
API::HostPrototype()->delete(array_keys($hostPrototypesToDelete));
}
// delete missing trigger prototypes
$dbTriggerPrototypeIds = API::TriggerPrototype()->get(array('output' => array('triggerid'), 'hostids' => $processedHostIds, 'preservekeys' => true, 'nopermissions' => true, 'inherited' => false));
$triggerPrototypesToDelete = array_diff_key($dbTriggerPrototypeIds, $triggerPrototypeIdsXML);
// unlike triggers that belong to multiple hosts, trigger prototypes do not, so we just delete them
if ($triggerPrototypesToDelete) {
API::TriggerPrototype()->delete(array_keys($triggerPrototypesToDelete));
}
// delete missing graph prototypes
$dbGraphPrototypeIds = API::GraphPrototype()->get(array('output' => array('graphid'), 'hostids' => $processedHostIds, 'preservekeys' => true, 'nopermissions' => true, 'inherited' => false));
$graphPrototypesToDelete = array_diff_key($dbGraphPrototypeIds, $graphPrototypeIdsXML);
// unlike graphs that belong to multiple hosts, graph prototypes do not, so we just delete them
if ($graphPrototypesToDelete) {
API::GraphPrototype()->delete(array_keys($graphPrototypesToDelete));
}
// delete missing item prototypes
$dbItemPrototypeIds = API::ItemPrototype()->get(array('output' => array('itemid'), 'hostids' => $processedHostIds, 'preservekeys' => true, 'nopermissions' => true, 'inherited' => false));
$itemPrototypesToDelete = array_diff_key($dbItemPrototypeIds, $itemPrototypeIdsXML);
if ($itemPrototypesToDelete) {
API::ItemPrototype()->delete(array_keys($itemPrototypesToDelete));
}
}
