/**
* Deletes graphs from DB that are missing in XML.
*
* @return null
*/
protected function deleteMissingGraphs()
{
if (!$this->options['graphs']['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;
}
$graphsIdsXML = array();
// gather host IDs for graphs that exist in XML
$allGraphs = $this->getFormattedGraphs();
if ($allGraphs) {
foreach ($allGraphs as $graph) {
if (isset($graph['gitems']) && $graph['gitems']) {
foreach ($graph['gitems'] as $gitem) {
$gitemHostId = $this->referencer->resolveHostOrTemplate($gitem['item']['host']);
$graphId = $this->referencer->resolveGraph($gitemHostId, $graph['name']);
if ($graphId) {
$graphsIdsXML[$graphId] = $graphId;
}
}
}
}
}
$dbGraphIds = API::Graph()->get(array('output' => array('graphid'), 'hostids' => $processedHostIds, 'selectHosts' => array('hostid'), 'preservekeys' => true, 'nopermissions' => true, 'inherited' => false, 'filter' => array('flags' => ZBX_FLAG_DISCOVERY_NORMAL)));
// check that potentially deletable graph belongs to same hosts that are in XML
// if some graphs belong to more hosts than current XML contains, don't delete them
$graphsToDelete = array_diff_key($dbGraphIds, $graphsIdsXML);
$graphIdsToDelete = array();
$processedHostIds = array_flip($processedHostIds);
foreach ($graphsToDelete as $graphId => $graph) {
$graphHostIds = array_flip(zbx_objectValues($graph['hosts'], 'hostid'));
if (!array_diff_key($graphHostIds, $processedHostIds)) {
$graphIdsToDelete[] = $graphId;
}
}
if ($graphIdsToDelete) {
API::Graph()->delete($graphIdsToDelete);
}
$this->referencer->refreshGraphs();
}
