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111 lines
3.7 KiB
111 lines
3.7 KiB
<?php declare(strict_types = 0);
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/*
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** Zabbix
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** Copyright (C) 2001-2023 Zabbix SIA
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**
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** This program is free software; you can redistribute it and/or modify
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** it under the terms of the GNU General Public License as published by
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** the Free Software Foundation; either version 2 of the License, or
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** (at your option) any later version.
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**
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** This program is distributed in the hope that it will be useful,
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** but WITHOUT ANY WARRANTY; without even the implied warranty of
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** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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** GNU General Public License for more details.
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**
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** You should have received a copy of the GNU General Public License
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** along with this program; if not, write to the Free Software
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** Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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**/
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/**
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* Helper class containing methods for operations with hosts.
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*/
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class CApiHostHelper {
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/**
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* Get all parent templates recursively for given hosts and/or templates.
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*
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* @param array $hostids Mandatory, not empty. Host or template id's for whom you are searching parents.
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*
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* @throws APIException if templates are looped.
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*
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* @return array List with two arrays: host to parent templates template map, list of all parent templates.
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*/
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public static function getParentTemplates(array $hostids): array {
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$hosts_templates = [];
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$step_hostids = array_flip($hostids);
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do {
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$step_hostids = array_keys($step_hostids);
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foreach ($step_hostids as $hostid) {
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$hosts_templates[$hostid]['parents'] = [];
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}
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$templateids = [];
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$db_host_templates = DBselect(
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'SELECT ht.hostid,ht.templateid'.
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' FROM hosts_templates ht'.
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' WHERE '.dbConditionInt('ht.hostid', $step_hostids)
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);
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while ($db_host_template = DBfetch($db_host_templates)) {
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$hosts_templates[$db_host_template['hostid']]['parents'][$db_host_template['templateid']] = true;
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$templateids[$db_host_template['templateid']] = true;
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}
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// Only unprocessed templates will be populated.
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$step_hostids = [];
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foreach (array_keys($templateids) as $templateid) {
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if (!array_key_exists($templateid, $hosts_templates)) {
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$step_hostids[$templateid] = true;
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}
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}
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} while ($step_hostids);
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$all_templateids = array_keys(array_diff_key($hosts_templates, array_flip($hostids)));
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$parent_map = [];
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foreach ($hostids as $hostid) {
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$parent_map[$hostid] = array_keys(CApiHostHelper::recursiveGetAllParents($hosts_templates, $hostid));
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}
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return [$parent_map, $all_templateids];
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}
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/**
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* Get all parent templates recursively for given templateid.
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*
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* @param array $template_tree Array with all template parents.
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* @param string $templateid ID of template whose parents we are looking for.
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*
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* @throws APIException if templates are looped.
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*
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* @return array All parent templates (as keys) for given templateid.
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*/
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private static function recursiveGetAllParents(array &$template_tree, $templateid): array {
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if (array_key_exists('started', $template_tree[$templateid])) {
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// Loop in recursion detected.
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throw new APIException(ZBX_API_ERROR_INTERNAL, _('Internal error.'));
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}
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$parents = $template_tree[$templateid]['parents'];
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// This template's parents are not yet retrieved. Collect them.
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if (!array_key_exists('final', $template_tree[$templateid])) {
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$template_tree[$templateid]['started'] = true;
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foreach (array_keys($template_tree[$templateid]['parents']) as $parentid) {
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$parents += CApiHostHelper::recursiveGetAllParents($template_tree, $parentid);
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}
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$template_tree[$templateid]['parents'] = $parents;
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unset($template_tree[$templateid]['started']);
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$template_tree[$templateid]['final'] = true;
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}
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return $parents;
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}
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}
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