97 lines
3.0 KiB
PHP
97 lines
3.0 KiB
PHP
<?php
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/* Icinga Web 2 | (c) 2014 Icinga Development Team | GPLv2+ */
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namespace Icinga\Module\Monitoring\Object;
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use Exception;
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use Icinga\Application\Logger;
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use stdClass;
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/**
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* Expand macros in string in the context of MonitoredObjects
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*/
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class Macro
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{
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/**
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* Known icinga macros
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*
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* @var array
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*/
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private static $icingaMacros = array(
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'HOSTNAME' => 'host_name',
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'HOSTADDRESS' => 'host_address',
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'HOSTADDRESS6' => 'host_address6',
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'SERVICEDESC' => 'service_description',
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'host.name' => 'host_name',
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'host.address' => 'host_address',
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'host.address6' => 'host_address6',
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'service.description' => 'service_description',
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'service.name' => 'service_description'
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);
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/**
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* Return the given string with macros being resolved
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*
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* @param string $input The string in which to look for macros
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* @param MonitoredObject|stdClass $object The host or service used to resolve macros
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*
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* @return string The substituted or unchanged string
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*/
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public static function resolveMacros($input, $object)
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{
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$matches = array();
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if (preg_match_all('@\$([^\$\s]+)\$@', $input, $matches)) {
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foreach ($matches[1] as $key => $value) {
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$newValue = self::resolveMacro($value, $object);
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if ($newValue !== $value) {
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$input = str_replace($matches[0][$key], $newValue, $input);
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}
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}
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}
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return $input;
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}
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/**
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* Resolve a macro based on the given object
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*
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* @param string $macro The macro to resolve
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* @param MonitoredObject|stdClass $object The object used to resolve the macro
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*
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* @return string The new value or the macro if it cannot be resolved
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*/
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public static function resolveMacro($macro, $object)
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{
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if (isset(self::$icingaMacros[$macro], $object->{self::$icingaMacros[$macro]})) {
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return $object->{self::$icingaMacros[$macro]};
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}
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try {
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$value = $object->$macro;
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} catch (Exception $e) {
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if ($object instanceof MonitoredObject) {
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$objectName = $object instanceof Service
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? $object->getHost()->getName() . '!' . $object->getName()
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: $object->getName();
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} else {
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$host = 'host_name';
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$service = 'service_description';
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$objectName = isset($object->$service)
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? $object->$service . '!' . $object->$host
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: $object->$host;
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}
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$value = null;
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Logger::debug(
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'Unable to resolve macro "%s" on object "%s". An error occurred: %s',
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$macro,
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$objectName,
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$e
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);
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}
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return $value ?? $macro;
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}
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}
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