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<?php
/*
** Zabbix
** Copyright (C) 2001-2019 Zabbix SIA
**
** This program is free software; you can redistribute it and/or modify
** it under the terms of the GNU General Public License as published by
** the Free Software Foundation; either version 2 of the License, or
** (at your option) any later version.
**
** This program is distributed in the hope that it will be useful,
** but WITHOUT ANY WARRANTY; without even the implied warranty of
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
** GNU General Public License for more details.
**
** You should have received a copy of the GNU General Public License
** along with this program; if not, write to the Free Software
** Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
**/
/**
* Class to perform low level trigger related actions.
*/
class CTriggerManager {
/**
* Deletes triggers and related entities without permission check.
*
* @param array $triggerids
*/
public static function delete(array $triggerids) {
$del_triggerids = [];
// Selecting all inherited triggers.
$parent_triggerids = array_flip($triggerids);
do {
$db_triggers = DBselect(
'SELECT t.triggerid'.
' FROM triggers t'.
' WHERE '.dbConditionInt('t.templateid', array_keys($parent_triggerids))
);
$del_triggerids += $parent_triggerids;
$parent_triggerids = [];
while ($db_trigger = DBfetch($db_triggers)) {
if (!array_key_exists($db_trigger['triggerid'], $del_triggerids)) {
$parent_triggerids[$db_trigger['triggerid']] = true;
}
}
} while ($parent_triggerids);
$del_triggerids = array_keys($del_triggerids);
// Disable actions.
$actionids = [];
$conditionids = [];
$db_actions = DBselect(
'SELECT ac.conditionid,ac.actionid'.
' FROM conditions ac'.
' WHERE ac.conditiontype='.CONDITION_TYPE_TRIGGER.
' AND '.dbConditionString('ac.value', $del_triggerids)
);
while ($db_action = DBfetch($db_actions)) {
$conditionids[] = $db_action['conditionid'];
$actionids[$db_action['actionid']] = true;
}
if ($actionids) {
DB::update('actions', [
'values' => ['status' => ACTION_STATUS_DISABLED],
'where' => ['actionid' => array_keys($actionids)]
]);
// Delete action conditions.
DB::delete('conditions', ['conditionid' => $conditionids]);
}
// Update IT services.
if (self::usedInItServices($del_triggerids)) {
DB::update('services', [
'values' => [
'triggerid' => null,
'showsla' => SERVICE_SHOW_SLA_OFF
],
'where' => ['triggerid' => $del_triggerids]
]);
updateItServices();
}
// Remove trigger sysmap elements.
$selement_triggerids = [];
$selementids = [];
$db_selement_triggers = DBselect(
'SELECT st.selement_triggerid,st.selementid'.
' FROM sysmap_element_trigger st'.
' WHERE '.dbConditionInt('st.triggerid', $del_triggerids)
);
while ($db_selement_trigger = DBfetch($db_selement_triggers)) {
$selement_triggerids[] = $db_selement_trigger['selement_triggerid'];
$selementids[$db_selement_trigger['selementid']] = true;
}
if ($selement_triggerids) {
DB::delete('sysmap_element_trigger', ['selement_triggerid' => $selement_triggerids]);
// Remove map elements without triggers.
$db_selement_triggers = DBselect(
'SELECT DISTINCT st.selementid'.
' FROM sysmap_element_trigger st'.
' WHERE '.dbConditionInt('st.selementid', array_keys($selementids))
);
while ($db_selement_trigger = DBfetch($db_selement_triggers)) {
unset($selementids[$db_selement_trigger['selementid']]);
}
if ($selementids) {
DB::delete('sysmaps_elements', ['selementid' => array_keys($selementids)]);
}
}
// Remove related events.
$ins_housekeeper = [];
foreach ($del_triggerids as $del_triggerid) {
$ins_housekeeper[] = [
'tablename' => 'events',
'field' => 'triggerid',
'value' => $del_triggerid
];
}
DB::insertBatch('housekeeper', $ins_housekeeper);
DB::delete('trigger_discovery', ['triggerid' => $del_triggerids]);
DB::delete('trigger_depends', ['triggerid_down' => $del_triggerids]);
DB::delete('trigger_depends', ['triggerid_up' => $del_triggerids]);
DB::delete('trigger_tag', ['triggerid' => $del_triggerids]);
DB::delete('triggers', ['triggerid' => $del_triggerids]);
}
/**
* Returns true if at least one of the given triggers is used in services.
*
* @param array $triggerids
*
* @return bool
*/
public static function usedInItServices(array $triggerids) {
$db_services = DBselect('SELECT NULL FROM services WHERE '.dbConditionInt('triggerid', $triggerids), 1);
return (bool) DBfetch($db_services);
}
}
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