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