filter {
	if [type] == "minetest_client_stats" {
		grok {
			patterns_dir   => "/usr/local/etc/logstash/patterns"
			match => { "message" => "%{MINETESTCLIENTLOG}" }
		}

		if "" in [client_version] {
		}
		else {
			mutate {
				add_field => { "client_version" => "Very old minetest version" }
			}
		}

		date {
			match => [ "timestamp", "dd/MMM/YYYY:HH:mm:ss Z" ]
		}
		mutate {
			remove_field => [timestamp]
		}
	}
}