##! Constants definitions for MQTT.

module MQTT;

export {
	const msg_types = {
		[1] = "connect",
		[2] = "connack",
		[3] = "publish",
		[4] = "puback",
		[5] = "pubrec",
		[6] = "pubrel",
		[7] = "pubcomp",
		[8] = "subscribe",
		[9] = "suback",
		[10] = "unsubscribe",
		[11] = "unsuback",
		[12] = "pingreq",
		[13] = "pingresp",
		[14] = "disconnect",
	} &default = function(n: count): string { return fmt("unknown-msg-type-%d", n); };

	const versions = {
		[3] = "3.1",
		[4] = "3.1.1",
		[5] = "5.0",
	} &default = function(n: count): string { return fmt("unknown-version-%d", n); };

	const qos_levels = {
		[0] = "at most once",
		[1] = "at least once",
		[2] = "exactly once",
	} &default = function(n: count): string { return fmt("unknown-qos-level-%d", n); };

	const return_codes = {
		[0] = "Connection Accepted",
		[1] = "Refused: unacceptable protocol version",
		[2] = "Refused: identifier rejected",
		[3] = "Refused: server unavailable",
		[4] = "Refused: bad user name or password",
		[5] = "Refused: not authorized",
	} &default = function(n: count): string { return fmt("unknown-return-code-%d", n); };
}