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Diffstat (limited to '')
-rw-r--r-- | modules/monitoring/library/Monitoring/Object/Macro.php | 82 |
1 files changed, 82 insertions, 0 deletions
diff --git a/modules/monitoring/library/Monitoring/Object/Macro.php b/modules/monitoring/library/Monitoring/Object/Macro.php new file mode 100644 index 0000000..3f67154 --- /dev/null +++ b/modules/monitoring/library/Monitoring/Object/Macro.php @@ -0,0 +1,82 @@ +<?php +/* Icinga Web 2 | (c) 2014 Icinga Development Team | GPLv2+ */ + +namespace Icinga\Module\Monitoring\Object; + +use Exception; +use Icinga\Application\Logger; + +/** + * Expand macros in string in the context of MonitoredObjects + */ +class Macro +{ + /** + * Known icinga macros + * + * @var array + */ + private static $icingaMacros = array( + 'HOSTNAME' => 'host_name', + 'HOSTADDRESS' => 'host_address', + 'HOSTADDRESS6' => 'host_address6', + 'SERVICEDESC' => 'service_description', + 'host.name' => 'host_name', + 'host.address' => 'host_address', + 'host.address6' => 'host_address6', + 'service.description' => 'service_description', + 'service.name' => 'service_description' + ); + + /** + * Return the given string with macros being resolved + * + * @param string $input The string in which to look for macros + * @param MonitoredObject|stdClass $object The host or service used to resolve macros + * + * @return string The substituted or unchanged string + */ + public static function resolveMacros($input, $object) + { + $matches = array(); + if (preg_match_all('@\$([^\$\s]+)\$@', $input, $matches)) { + foreach ($matches[1] as $key => $value) { + $newValue = self::resolveMacro($value, $object); + if ($newValue !== $value) { + $input = str_replace($matches[0][$key], $newValue, $input); + } + } + } + + return $input; + } + + /** + * Resolve a macro based on the given object + * + * @param string $macro The macro to resolve + * @param MonitoredObject|stdClass $object The object used to resolve the macro + * + * @return string The new value or the macro if it cannot be resolved + */ + public static function resolveMacro($macro, $object) + { + if (isset(self::$icingaMacros[$macro]) && isset($object->{self::$icingaMacros[$macro]})) { + return $object->{self::$icingaMacros[$macro]}; + } + + try { + $value = $object->$macro; + } catch (Exception $e) { + $objectName = $object->getName(); + if ($object instanceof Service) { + $objectName = $object->getHost()->getName() . '!' . $objectName; + } + + $value = null; + Logger::debug('Unable to resolve macro "%s" on object "%s". An error occured: %s', $macro, $objectName, $e); + } + + return $value !== null ? $value : $macro; + } +} |