jsdw_ios/Pods/CocoaMQTT/Source/FrameUnsubAck.swift

118 lines
2.6 KiB
Swift

//
// FrameUnsubAck.swift
// CocoaMQTT
//
// Created by JianBo on 2019/8/7.
// Copyright © 2019 emqx.io. All rights reserved.
//
import Foundation
/// MQTT UNSUBACK packet
struct FrameUnsubAck: Frame {
var packetFixedHeaderType: UInt8 = FrameType.unsuback.rawValue
// --- Attributes
var msgid: UInt16
// --- Attributes End
// 3.10.2.1 UNSUBSCRIBE Properties
public var unSubAckProperties: MqttDecodeUnsubAck?
// 3.11.2 Property
public var userProperty: [String: String]?
// 3.11.2.1.2 Reason String
public var reasonString: String?
var _payload: [UInt8] = []
init(msgid: UInt16, payload: [UInt8]) {
self.msgid = msgid
self._payload = payload
}
}
extension FrameUnsubAck {
func fixedHeader() -> [UInt8] {
var header = [UInt8]()
header += [FrameType.unsuback.rawValue]
return header
}
func variableHeader5() -> [UInt8] {
// 3.11.2 MSB+LSB
var header = msgid.hlBytes
// MQTT 5.0
header += beVariableByteInteger(length: self.properties().count)
return header
}
func payload5() -> [UInt8] { return _payload }
func properties() -> [UInt8] {
var properties = [UInt8]()
// 3.11.2.1.2 Reason String
if let reasonString = self.reasonString {
properties += getMQTTPropertyData(type: CocoaMQTTPropertyName.reasonString.rawValue, value: reasonString.bytesWithLength)
}
// 3.11.2.1.3 User Property
if let userProperty = self.userProperty {
properties += userProperty.userPropertyBytes
}
return properties
}
func allData() -> [UInt8] {
var allData = [UInt8]()
allData += fixedHeader()
allData += variableHeader5()
allData += properties()
allData += payload5()
return allData
}
func variableHeader() -> [UInt8] { return msgid.hlBytes }
func payload() -> [UInt8] { return [] }
}
extension FrameUnsubAck: InitialWithBytes {
init?(packetFixedHeaderType: UInt8, bytes: [UInt8]) {
guard packetFixedHeaderType == FrameType.unsuback.rawValue else {
return nil
}
guard bytes.count >= 2 else {
return nil
}
msgid = UInt16(bytes[0]) << 8 + UInt16(bytes[1])
self.unSubAckProperties = MqttDecodeUnsubAck()
self.unSubAckProperties!.decodeUnSubAck(fixedHeader: packetFixedHeaderType, pubAckData: bytes)
}
}
extension FrameUnsubAck: CustomStringConvertible {
var description: String {
return "UNSUBSACK(id: \(msgid))"
}
}