jsdw_ios/Pods/CocoaMQTT/Source/FrameUnsubscribe.swift

140 lines
3.0 KiB
Swift

//
// FrameUnsubscribe.swift
// CocoaMQTT
//
// Created by JianBo on 2019/8/7.
// Copyright © 2019 emqx.io. All rights reserved.
//
import Foundation
/// MQTT UNSUBSCRIBE packet
struct FrameUnsubscribe: Frame {
var packetFixedHeaderType: UInt8 = UInt8(FrameType.unsubscribe.rawValue + 2)
// --- Attributes
var msgid: UInt16?
/// MQTT 3.1.1
var topics: [String]?
/// MQTT 5.0
var topicFilters: [MqttSubscription]?
// --- Attribetes end
// 3.10.2.1.2 User Property
public var userProperty: [String: String]?
/// MQTT 3.1.1
init(msgid: UInt16, topics: [String]) {
self.msgid = msgid
self.topics = topics
qos = CocoaMQTTQoS.qos1
}
/// MQTT 5.0
init(msgid: UInt16, topics: [MqttSubscription]) {
self.msgid = msgid
self.topicFilters = topics
qos = CocoaMQTTQoS.qos1
}
}
extension FrameUnsubscribe {
func fixedHeader() -> [UInt8] {
var header = [UInt8]()
header += [FrameType.unsubscribe.rawValue]
return header
}
func variableHeader5() -> [UInt8] {
// MQTT 5.0
var header = [UInt8]()
header = msgid!.hlBytes
header += beVariableByteInteger(length: self.properties().count)
return header
}
func payload5() -> [UInt8] {
var payload = [UInt8]()
for subscription in topicFilters! {
subscription.subscriptionOptions = false
payload += subscription.subscriptionData
}
return payload
}
func properties() -> [UInt8] {
var properties = [UInt8]()
// 3.10.2.1.2 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] {
var payload = [UInt8]()
for t in topics! {
payload += t.bytesWithLength
}
return payload
}
}
extension FrameUnsubscribe: CustomStringConvertible {
var description: String {
var protocolVersion = ""
if let storage = CocoaMQTTStorage() {
protocolVersion = storage.queryMQTTVersion()
}
if protocolVersion == "5.0" {
var desc = ""
if let unwrappedList = topicFilters, !unwrappedList.isEmpty {
for subscription in unwrappedList {
desc += "UNSUBSCRIBE(id: \(String(describing: subscription.topic)), topics: \(subscription.topic)) "
}
}
return desc
} else {
return "UNSUBSCRIBE(id: \(String(describing: msgid)), topics: \(String(describing: topics)))"
}
}
}