wxmini/miniprogram_npm/mqtt-packet/index.js

module.exports = (function() {
var __MODS__ = {};
var __DEFINE__ = function(modId, func, req) { var m = { exports: {}, _tempexports: {} }; __MODS__[modId] = { status: 0, func: func, req: req, m: m }; };
var __REQUIRE__ = function(modId, source) { if(!__MODS__[modId]) return require(source); if(!__MODS__[modId].status) { var m = __MODS__[modId].m; m._exports = m._tempexports; var desp = Object.getOwnPropertyDescriptor(m, "exports"); if (desp && desp.configurable) Object.defineProperty(m, "exports", { set: function (val) { if(typeof val === "object" && val !== m._exports) { m._exports.__proto__ = val.__proto__; Object.keys(val).forEach(function (k) { m._exports[k] = val[k]; }); } m._tempexports = val }, get: function () { return m._tempexports; } }); __MODS__[modId].status = 1; __MODS__[modId].func(__MODS__[modId].req, m, m.exports); } return __MODS__[modId].m.exports; };
var __REQUIRE_WILDCARD__ = function(obj) { if(obj && obj.__esModule) { return obj; } else { var newObj = {}; if(obj != null) { for(var k in obj) { if (Object.prototype.hasOwnProperty.call(obj, k)) newObj[k] = obj[k]; } } newObj.default = obj; return newObj; } };
var __REQUIRE_DEFAULT__ = function(obj) { return obj && obj.__esModule ? obj.default : obj; };
__DEFINE__(1682324647504, function(require, module, exports) {
exports.parser = require('./parser').parser
exports.generate = require('./generate')
exports.writeToStream = require('./writeToStream')

}, function(modId) {var map = {"./parser":1682324647505,"./generate":1682324647508,"./writeToStream":1682324647509}; return __REQUIRE__(map[modId], modId); })
__DEFINE__(1682324647505, function(require, module, exports) {
const bl = require('bl')
const EventEmitter = require('events')
const Packet = require('./packet')
const constants = require('./constants')
const debug = require('debug')('mqtt-packet:parser')

class Parser extends EventEmitter {
  constructor () {
    super()
    this.parser = this.constructor.parser
  }

  static parser (opt) {
    if (!(this instanceof Parser)) return (new Parser()).parser(opt)

    this.settings = opt || {}

    this._states = [
      '_parseHeader',
      '_parseLength',
      '_parsePayload',
      '_newPacket'
    ]

    this._resetState()
    return this
  }

  _resetState () {
    debug('_resetState: resetting packet, error, _list, and _stateCounter')
    this.packet = new Packet()
    this.error = null
    this._list = bl()
    this._stateCounter = 0
  }

  parse (buf) {
    if (this.error) this._resetState()

    this._list.append(buf)
    debug('parse: current state: %s', this._states[this._stateCounter])
    while ((this.packet.length !== -1 || this._list.length > 0) &&
      this[this._states[this._stateCounter]]() &&
      !this.error) {
      this._stateCounter++
      debug('parse: state complete. _stateCounter is now: %d', this._stateCounter)
      debug('parse: packet.length: %d, buffer list length: %d', this.packet.length, this._list.length)
      if (this._stateCounter >= this._states.length) this._stateCounter = 0
    }
    debug('parse: exited while loop. packet: %d, buffer list length: %d', this.packet.length, this._list.length)
    return this._list.length
  }

  _parseHeader () {
    // There is at least one byte in the buffer
    const zero = this._list.readUInt8(0)
    this.packet.cmd = constants.types[zero >> constants.CMD_SHIFT]
    this.packet.retain = (zero & constants.RETAIN_MASK) !== 0
    this.packet.qos = (zero >> constants.QOS_SHIFT) & constants.QOS_MASK
    this.packet.dup = (zero & constants.DUP_MASK) !== 0
    debug('_parseHeader: packet: %o', this.packet)

    this._list.consume(1)

    return true
  }

  _parseLength () {
    // There is at least one byte in the list
    const result = this._parseVarByteNum(true)

    if (result) {
      this.packet.length = result.value
      this._list.consume(result.bytes)
    }
    debug('_parseLength %d', result.value)
    return !!result
  }

  _parsePayload () {
    debug('_parsePayload: payload %O', this._list)
    let result = false

    // Do we have a payload? Do we have enough data to complete the payload?
    // PINGs have no payload
    if (this.packet.length === 0 || this._list.length >= this.packet.length) {
      this._pos = 0

      switch (this.packet.cmd) {
        case 'connect':
          this._parseConnect()
          break
        case 'connack':
          this._parseConnack()
          break
        case 'publish':
          this._parsePublish()
          break
        case 'puback':
        case 'pubrec':
        case 'pubrel':
        case 'pubcomp':
          this._parseConfirmation()
          break
        case 'subscribe':
          this._parseSubscribe()
          break
        case 'suback':
          this._parseSuback()
          break
        case 'unsubscribe':
          this._parseUnsubscribe()
          break
        case 'unsuback':
          this._parseUnsuback()
          break
        case 'pingreq':
        case 'pingresp':
          // These are empty, nothing to do
          break
        case 'disconnect':
          this._parseDisconnect()
          break
        case 'auth':
          this._parseAuth()
          break
        default:
          this._emitError(new Error('Not supported'))
      }

      result = true
    }
    debug('_parsePayload complete result: %s', result)
    return result
  }

  _parseConnect () {
    debug('_parseConnect')
    let topic // Will topic
    let payload // Will payload
    let password // Password
    let username // Username
    const flags = {}
    const packet = this.packet

    // Parse protocolId
    const protocolId = this._parseString()

    if (protocolId === null) return this._emitError(new Error('Cannot parse protocolId'))
    if (protocolId !== 'MQTT' && protocolId !== 'MQIsdp') {
      return this._emitError(new Error('Invalid protocolId'))
    }

    packet.protocolId = protocolId

    // Parse constants version number
    if (this._pos >= this._list.length) return this._emitError(new Error('Packet too short'))

    packet.protocolVersion = this._list.readUInt8(this._pos)

    if (packet.protocolVersion >= 128) {
      packet.bridgeMode = true
      packet.protocolVersion = packet.protocolVersion - 128
    }

    if (packet.protocolVersion !== 3 && packet.protocolVersion !== 4 && packet.protocolVersion !== 5) {
      return this._emitError(new Error('Invalid protocol version'))
    }

    this._pos++

    if (this._pos >= this._list.length) {
      return this._emitError(new Error('Packet too short'))
    }

    // Parse connect flags
    flags.username = (this._list.readUInt8(this._pos) & constants.USERNAME_MASK)
    flags.password = (this._list.readUInt8(this._pos) & constants.PASSWORD_MASK)
    flags.will = (this._list.readUInt8(this._pos) & constants.WILL_FLAG_MASK)

    if (flags.will) {
      packet.will = {}
      packet.will.retain = (this._list.readUInt8(this._pos) & constants.WILL_RETAIN_MASK) !== 0
      packet.will.qos = (this._list.readUInt8(this._pos) &
        constants.WILL_QOS_MASK) >> constants.WILL_QOS_SHIFT
    }

    packet.clean = (this._list.readUInt8(this._pos) & constants.CLEAN_SESSION_MASK) !== 0
    this._pos++

    // Parse keepalive
    packet.keepalive = this._parseNum()
    if (packet.keepalive === -1) return this._emitError(new Error('Packet too short'))

    // parse properties
    if (packet.protocolVersion === 5) {
      const properties = this._parseProperties()
      if (Object.getOwnPropertyNames(properties).length) {
        packet.properties = properties
      }
    }
    // Parse clientId
    const clientId = this._parseString()
    if (clientId === null) return this._emitError(new Error('Packet too short'))
    packet.clientId = clientId
    debug('_parseConnect: packet.clientId: %s', packet.clientId)

    if (flags.will) {
      if (packet.protocolVersion === 5) {
        const willProperties = this._parseProperties()
        if (Object.getOwnPropertyNames(willProperties).length) {
          packet.will.properties = willProperties
        }
      }
      // Parse will topic
      topic = this._parseString()
      if (topic === null) return this._emitError(new Error('Cannot parse will topic'))
      packet.will.topic = topic
      debug('_parseConnect: packet.will.topic: %s', packet.will.topic)

      // Parse will payload
      payload = this._parseBuffer()
      if (payload === null) return this._emitError(new Error('Cannot parse will payload'))
      packet.will.payload = payload
      debug('_parseConnect: packet.will.paylaod: %s', packet.will.payload)
    }

    // Parse username
    if (flags.username) {
      username = this._parseString()
      if (username === null) return this._emitError(new Error('Cannot parse username'))
      packet.username = username
      debug('_parseConnect: packet.username: %s', packet.username)
    }

    // Parse password
    if (flags.password) {
      password = this._parseBuffer()
      if (password === null) return this._emitError(new Error('Cannot parse password'))
      packet.password = password
    }
    // need for right parse auth packet and self set up
    this.settings = packet
    debug('_parseConnect: complete')
    return packet
  }

  _parseConnack () {
    debug('_parseConnack')
    const packet = this.packet

    if (this._list.length < 1) return null
    packet.sessionPresent = !!(this._list.readUInt8(this._pos++) & constants.SESSIONPRESENT_MASK)

    if (this.settings.protocolVersion === 5) {
      if (this._list.length >= 2) {
        packet.reasonCode = this._list.readUInt8(this._pos++)
      } else {
        packet.reasonCode = 0
      }
    } else {
      if (this._list.length < 2) return null
      packet.returnCode = this._list.readUInt8(this._pos++)
    }

    if (packet.returnCode === -1 || packet.reasonCode === -1) return this._emitError(new Error('Cannot parse return code'))
    // mqtt 5 properties
    if (this.settings.protocolVersion === 5) {
      const properties = this._parseProperties()
      if (Object.getOwnPropertyNames(properties).length) {
        packet.properties = properties
      }
    }
    debug('_parseConnack: complete')
  }

  _parsePublish () {
    debug('_parsePublish')
    const packet = this.packet
    packet.topic = this._parseString()

    if (packet.topic === null) return this._emitError(new Error('Cannot parse topic'))

    // Parse messageId
    if (packet.qos > 0) if (!this._parseMessageId()) { return }

    // Properties mqtt 5
    if (this.settings.protocolVersion === 5) {
      const properties = this._parseProperties()
      if (Object.getOwnPropertyNames(properties).length) {
        packet.properties = properties
      }
    }

    packet.payload = this._list.slice(this._pos, packet.length)
    debug('_parsePublish: payload from buffer list: %o', packet.payload)
  }

  _parseSubscribe () {
    debug('_parseSubscribe')
    const packet = this.packet
    let topic
    let options
    let qos
    let rh
    let rap
    let nl
    let subscription

    if (packet.qos !== 1) {
      return this._emitError(new Error('Wrong subscribe header'))
    }

    packet.subscriptions = []

    if (!this._parseMessageId()) { return }

    // Properties mqtt 5
    if (this.settings.protocolVersion === 5) {
      const properties = this._parseProperties()
      if (Object.getOwnPropertyNames(properties).length) {
        packet.properties = properties
      }
    }

    while (this._pos < packet.length) {
      // Parse topic
      topic = this._parseString()
      if (topic === null) return this._emitError(new Error('Cannot parse topic'))
      if (this._pos >= packet.length) return this._emitError(new Error('Malformed Subscribe Payload'))

      options = this._parseByte()
      qos = options & constants.SUBSCRIBE_OPTIONS_QOS_MASK
      nl = ((options >> constants.SUBSCRIBE_OPTIONS_NL_SHIFT) & constants.SUBSCRIBE_OPTIONS_NL_MASK) !== 0
      rap = ((options >> constants.SUBSCRIBE_OPTIONS_RAP_SHIFT) & constants.SUBSCRIBE_OPTIONS_RAP_MASK) !== 0
      rh = (options >> constants.SUBSCRIBE_OPTIONS_RH_SHIFT) & constants.SUBSCRIBE_OPTIONS_RH_MASK

      subscription = { topic, qos }

      // mqtt 5 options
      if (this.settings.protocolVersion === 5) {
        subscription.nl = nl
        subscription.rap = rap
        subscription.rh = rh
      } else if (this.settings.bridgeMode) {
        subscription.rh = 0
        subscription.rap = true
        subscription.nl = true
      }

      // Push pair to subscriptions
      debug('_parseSubscribe: push subscription `%s` to subscription', subscription)
      packet.subscriptions.push(subscription)
    }
  }

  _parseSuback () {
    debug('_parseSuback')
    const packet = this.packet
    this.packet.granted = []

    if (!this._parseMessageId()) { return }

    // Properties mqtt 5
    if (this.settings.protocolVersion === 5) {
      const properties = this._parseProperties()
      if (Object.getOwnPropertyNames(properties).length) {
        packet.properties = properties
      }
    }

    // Parse granted QoSes
    while (this._pos < this.packet.length) {
      this.packet.granted.push(this._list.readUInt8(this._pos++))
    }
  }

  _parseUnsubscribe () {
    debug('_parseUnsubscribe')
    const packet = this.packet

    packet.unsubscriptions = []

    // Parse messageId
    if (!this._parseMessageId()) { return }

    // Properties mqtt 5
    if (this.settings.protocolVersion === 5) {
      const properties = this._parseProperties()
      if (Object.getOwnPropertyNames(properties).length) {
        packet.properties = properties
      }
    }

    while (this._pos < packet.length) {
      // Parse topic
      const topic = this._parseString()
      if (topic === null) return this._emitError(new Error('Cannot parse topic'))

      // Push topic to unsubscriptions
      debug('_parseUnsubscribe: push topic `%s` to unsubscriptions', topic)
      packet.unsubscriptions.push(topic)
    }
  }

  _parseUnsuback () {
    debug('_parseUnsuback')
    const packet = this.packet
    if (!this._parseMessageId()) return this._emitError(new Error('Cannot parse messageId'))
    // Properties mqtt 5
    if (this.settings.protocolVersion === 5) {
      const properties = this._parseProperties()
      if (Object.getOwnPropertyNames(properties).length) {
        packet.properties = properties
      }
      // Parse granted QoSes
      packet.granted = []
      while (this._pos < this.packet.length) {
        this.packet.granted.push(this._list.readUInt8(this._pos++))
      }
    }
  }

  // parse packets like puback, pubrec, pubrel, pubcomp
  _parseConfirmation () {
    debug('_parseConfirmation: packet.cmd: `%s`', this.packet.cmd)
    const packet = this.packet

    this._parseMessageId()

    if (this.settings.protocolVersion === 5) {
      if (packet.length > 2) {
        // response code
        packet.reasonCode = this._parseByte()
        debug('_parseConfirmation: packet.reasonCode `%d`', packet.reasonCode)
      } else {
        packet.reasonCode = 0
      }

      if (packet.length > 3) {
        // properies mqtt 5
        const properties = this._parseProperties()
        if (Object.getOwnPropertyNames(properties).length) {
          packet.properties = properties
        }
      }
    }

    return true
  }

  // parse disconnect packet
  _parseDisconnect () {
    const packet = this.packet
    debug('_parseDisconnect')

    if (this.settings.protocolVersion === 5) {
      // response code
      if (this._list.length > 0) {
        packet.reasonCode = this._parseByte()
      } else {
        packet.reasonCode = 0
      }
      // properies mqtt 5
      const properties = this._parseProperties()
      if (Object.getOwnPropertyNames(properties).length) {
        packet.properties = properties
      }
    }

    debug('_parseDisconnect result: true')
    return true
  }

  // parse auth packet
  _parseAuth () {
    debug('_parseAuth')
    const packet = this.packet

    if (this.settings.protocolVersion !== 5) {
      return this._emitError(new Error('Not supported auth packet for this version MQTT'))
    }

    // response code
    packet.reasonCode = this._parseByte()
    // properies mqtt 5
    const properties = this._parseProperties()
    if (Object.getOwnPropertyNames(properties).length) {
      packet.properties = properties
    }

    debug('_parseAuth: result: true')
    return true
  }

  _parseMessageId () {
    const packet = this.packet

    packet.messageId = this._parseNum()

    if (packet.messageId === null) {
      this._emitError(new Error('Cannot parse messageId'))
      return false
    }

    debug('_parseMessageId: packet.messageId %d', packet.messageId)
    return true
  }

  _parseString (maybeBuffer) {
    const length = this._parseNum()
    const end = length + this._pos

    if (length === -1 || end > this._list.length || end > this.packet.length) return null

    const result = this._list.toString('utf8', this._pos, end)
    this._pos += length
    debug('_parseString: result: %s', result)
    return result
  }

  _parseStringPair () {
    debug('_parseStringPair')
    return {
      name: this._parseString(),
      value: this._parseString()
    }
  }

  _parseBuffer () {
    const length = this._parseNum()
    const end = length + this._pos

    if (length === -1 || end > this._list.length || end > this.packet.length) return null

    const result = this._list.slice(this._pos, end)

    this._pos += length
    debug('_parseBuffer: result: %o', result)
    return result
  }

  _parseNum () {
    if (this._list.length - this._pos < 2) return -1

    const result = this._list.readUInt16BE(this._pos)
    this._pos += 2
    debug('_parseNum: result: %s', result)
    return result
  }

  _parse4ByteNum () {
    if (this._list.length - this._pos < 4) return -1

    const result = this._list.readUInt32BE(this._pos)
    this._pos += 4
    debug('_parse4ByteNum: result: %s', result)
    return result
  }

  _parseVarByteNum (fullInfoFlag) {
    debug('_parseVarByteNum')
    const maxBytes = 4
    let bytes = 0
    let mul = 1
    let value = 0
    let result = false
    let current
    const padding = this._pos ? this._pos : 0

    while (bytes < maxBytes && (padding + bytes) < this._list.length) {
      current = this._list.readUInt8(padding + bytes++)
      value += mul * (current & constants.VARBYTEINT_MASK)
      mul *= 0x80

      if ((current & constants.VARBYTEINT_FIN_MASK) === 0) {
        result = true
        break
      }
      if (this._list.length <= bytes) {
        break
      }
    }

    if (!result && bytes === maxBytes && this._list.length >= bytes) {
      this._emitError(new Error('Invalid variable byte integer'))
    }

    if (padding) {
      this._pos += bytes
    }

    result = result
      ? fullInfoFlag ? {
        bytes,
        value
      } : value
      : false

    debug('_parseVarByteNum: result: %o', result)
    return result
  }

  _parseByte () {
    let result
    if (this._pos < this._list.length) {
      result = this._list.readUInt8(this._pos)
      this._pos++
    }
    debug('_parseByte: result: %o', result)
    return result
  }

  _parseByType (type) {
    debug('_parseByType: type: %s', type)
    switch (type) {
      case 'byte': {
        return this._parseByte() !== 0
      }
      case 'int8': {
        return this._parseByte()
      }
      case 'int16': {
        return this._parseNum()
      }
      case 'int32': {
        return this._parse4ByteNum()
      }
      case 'var': {
        return this._parseVarByteNum()
      }
      case 'string': {
        return this._parseString()
      }
      case 'pair': {
        return this._parseStringPair()
      }
      case 'binary': {
        return this._parseBuffer()
      }
    }
  }

  _parseProperties () {
    debug('_parseProperties')
    const length = this._parseVarByteNum()
    const start = this._pos
    const end = start + length
    const result = {}
    while (this._pos < end) {
      const type = this._parseByte()
      if (!type) {
        this._emitError(new Error('Cannot parse property code type'))
        return false
      }
      const name = constants.propertiesCodes[type]
      if (!name) {
        this._emitError(new Error('Unknown property'))
        return false
      }
      // user properties process
      if (name === 'userProperties') {
        if (!result[name]) {
          result[name] = Object.create(null)
        }
        const currentUserProperty = this._parseByType(constants.propertiesTypes[name])
        if (result[name][currentUserProperty.name]) {
          if (Array.isArray(result[name][currentUserProperty.name])) {
            result[name][currentUserProperty.name].push(currentUserProperty.value)
          } else {
            const currentValue = result[name][currentUserProperty.name]
            result[name][currentUserProperty.name] = [currentValue]
            result[name][currentUserProperty.name].push(currentUserProperty.value)
          }
        } else {
          result[name][currentUserProperty.name] = currentUserProperty.value
        }
        continue
      }
      if (result[name]) {
        if (Array.isArray(result[name])) {
          result[name].push(this._parseByType(constants.propertiesTypes[name]))
        } else {
          result[name] = [result[name]]
          result[name].push(this._parseByType(constants.propertiesTypes[name]))
        }
      } else {
        result[name] = this._parseByType(constants.propertiesTypes[name])
      }
    }
    return result
  }

  _newPacket () {
    debug('_newPacket')
    if (this.packet) {
      this._list.consume(this.packet.length)
      debug('_newPacket: parser emit packet: packet.cmd: %s, packet.payload: %s, packet.length: %d', this.packet.cmd, this.packet.payload, this.packet.length)
      this.emit('packet', this.packet)
    }
    debug('_newPacket: new packet')
    this.packet = new Packet()

    this._pos = 0

    return true
  }

  _emitError (err) {
    debug('_emitError')
    this.error = err
    this.emit('error', err)
  }
}

module.exports = Parser

}, function(modId) { var map = {"./packet":1682324647506,"./constants":1682324647507}; return __REQUIRE__(map[modId], modId); })
__DEFINE__(1682324647506, function(require, module, exports) {
class Packet {
  constructor () {
    this.cmd = null
    this.retain = false
    this.qos = 0
    this.dup = false
    this.length = -1
    this.topic = null
    this.payload = null
  }
}

module.exports = Packet

}, function(modId) { var map = {}; return __REQUIRE__(map[modId], modId); })
__DEFINE__(1682324647507, function(require, module, exports) {
/* Protocol - protocol constants */
const protocol = module.exports

/* Command code => mnemonic */
protocol.types = {
  0: 'reserved',
  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',
  15: 'auth'
}

/* Mnemonic => Command code */
protocol.codes = {}
for (const k in protocol.types) {
  const v = protocol.types[k]
  protocol.codes[v] = k
}

/* Header */
protocol.CMD_SHIFT = 4
protocol.CMD_MASK = 0xF0
protocol.DUP_MASK = 0x08
protocol.QOS_MASK = 0x03
protocol.QOS_SHIFT = 1
protocol.RETAIN_MASK = 0x01

/* Length */
protocol.VARBYTEINT_MASK = 0x7F
protocol.VARBYTEINT_FIN_MASK = 0x80
protocol.VARBYTEINT_MAX = 268435455

/* Connack */
protocol.SESSIONPRESENT_MASK = 0x01
protocol.SESSIONPRESENT_HEADER = Buffer.from([protocol.SESSIONPRESENT_MASK])
protocol.CONNACK_HEADER = Buffer.from([protocol.codes.connack << protocol.CMD_SHIFT])

/* Connect */
protocol.USERNAME_MASK = 0x80
protocol.PASSWORD_MASK = 0x40
protocol.WILL_RETAIN_MASK = 0x20
protocol.WILL_QOS_MASK = 0x18
protocol.WILL_QOS_SHIFT = 3
protocol.WILL_FLAG_MASK = 0x04
protocol.CLEAN_SESSION_MASK = 0x02
protocol.CONNECT_HEADER = Buffer.from([protocol.codes.connect << protocol.CMD_SHIFT])

/* Properties */
protocol.properties = {
  sessionExpiryInterval: 17,
  willDelayInterval: 24,
  receiveMaximum: 33,
  maximumPacketSize: 39,
  topicAliasMaximum: 34,
  requestResponseInformation: 25,
  requestProblemInformation: 23,
  userProperties: 38,
  authenticationMethod: 21,
  authenticationData: 22,
  payloadFormatIndicator: 1,
  messageExpiryInterval: 2,
  contentType: 3,
  responseTopic: 8,
  correlationData: 9,
  maximumQoS: 36,
  retainAvailable: 37,
  assignedClientIdentifier: 18,
  reasonString: 31,
  wildcardSubscriptionAvailable: 40,
  subscriptionIdentifiersAvailable: 41,
  sharedSubscriptionAvailable: 42,
  serverKeepAlive: 19,
  responseInformation: 26,
  serverReference: 28,
  topicAlias: 35,
  subscriptionIdentifier: 11
}
protocol.propertiesCodes = {}
for (const prop in protocol.properties) {
  const id = protocol.properties[prop]
  protocol.propertiesCodes[id] = prop
}
protocol.propertiesTypes = {
  sessionExpiryInterval: 'int32',
  willDelayInterval: 'int32',
  receiveMaximum: 'int16',
  maximumPacketSize: 'int32',
  topicAliasMaximum: 'int16',
  requestResponseInformation: 'byte',
  requestProblemInformation: 'byte',
  userProperties: 'pair',
  authenticationMethod: 'string',
  authenticationData: 'binary',
  payloadFormatIndicator: 'byte',
  messageExpiryInterval: 'int32',
  contentType: 'string',
  responseTopic: 'string',
  correlationData: 'binary',
  maximumQoS: 'int8',
  retainAvailable: 'byte',
  assignedClientIdentifier: 'string',
  reasonString: 'string',
  wildcardSubscriptionAvailable: 'byte',
  subscriptionIdentifiersAvailable: 'byte',
  sharedSubscriptionAvailable: 'byte',
  serverKeepAlive: 'int16',
  responseInformation: 'string',
  serverReference: 'string',
  topicAlias: 'int16',
  subscriptionIdentifier: 'var'
}

function genHeader (type) {
  return [0, 1, 2].map(qos => {
    return [0, 1].map(dup => {
      return [0, 1].map(retain => {
        const buf = Buffer.alloc(1)
        buf.writeUInt8(
          protocol.codes[type] << protocol.CMD_SHIFT |
          (dup ? protocol.DUP_MASK : 0) |
          qos << protocol.QOS_SHIFT | retain, 0, true)
        return buf
      })
    })
  })
}

/* Publish */
protocol.PUBLISH_HEADER = genHeader('publish')

/* Subscribe */
protocol.SUBSCRIBE_HEADER = genHeader('subscribe')
protocol.SUBSCRIBE_OPTIONS_QOS_MASK = 0x03
protocol.SUBSCRIBE_OPTIONS_NL_MASK = 0x01
protocol.SUBSCRIBE_OPTIONS_NL_SHIFT = 2
protocol.SUBSCRIBE_OPTIONS_RAP_MASK = 0x01
protocol.SUBSCRIBE_OPTIONS_RAP_SHIFT = 3
protocol.SUBSCRIBE_OPTIONS_RH_MASK = 0x03
protocol.SUBSCRIBE_OPTIONS_RH_SHIFT = 4
protocol.SUBSCRIBE_OPTIONS_RH = [0x00, 0x10, 0x20]
protocol.SUBSCRIBE_OPTIONS_NL = 0x04
protocol.SUBSCRIBE_OPTIONS_RAP = 0x08
protocol.SUBSCRIBE_OPTIONS_QOS = [0x00, 0x01, 0x02]

/* Unsubscribe */
protocol.UNSUBSCRIBE_HEADER = genHeader('unsubscribe')

/* Confirmations */
protocol.ACKS = {
  unsuback: genHeader('unsuback'),
  puback: genHeader('puback'),
  pubcomp: genHeader('pubcomp'),
  pubrel: genHeader('pubrel'),
  pubrec: genHeader('pubrec')
}

protocol.SUBACK_HEADER = Buffer.from([protocol.codes.suback << protocol.CMD_SHIFT])

/* Protocol versions */
protocol.VERSION3 = Buffer.from([3])
protocol.VERSION4 = Buffer.from([4])
protocol.VERSION5 = Buffer.from([5])
protocol.VERSION131 = Buffer.from([131])
protocol.VERSION132 = Buffer.from([132])

/* QoS */
protocol.QOS = [0, 1, 2].map(qos => {
  return Buffer.from([qos])
})

/* Empty packets */
protocol.EMPTY = {
  pingreq: Buffer.from([protocol.codes.pingreq << 4, 0]),
  pingresp: Buffer.from([protocol.codes.pingresp << 4, 0]),
  disconnect: Buffer.from([protocol.codes.disconnect << 4, 0])
}

}, function(modId) { var map = {}; return __REQUIRE__(map[modId], modId); })
__DEFINE__(1682324647508, function(require, module, exports) {
const writeToStream = require('./writeToStream')
const EventEmitter = require('events')

function generate (packet, opts) {
  const stream = new Accumulator()
  writeToStream(packet, stream, opts)
  return stream.concat()
}

class Accumulator extends EventEmitter {
  constructor () {
    super()
    this._array = new Array(20)
    this._i = 0
  }

  write (chunk) {
    this._array[this._i++] = chunk
    return true
  }

  concat () {
    let length = 0
    const lengths = new Array(this._array.length)
    const list = this._array
    let pos = 0
    let i

    for (i = 0; i < list.length && list[i] !== undefined; i++) {
      if (typeof list[i] !== 'string') lengths[i] = list[i].length
      else lengths[i] = Buffer.byteLength(list[i])

      length += lengths[i]
    }

    const result = Buffer.allocUnsafe(length)

    for (i = 0; i < list.length && list[i] !== undefined; i++) {
      if (typeof list[i] !== 'string') {
        list[i].copy(result, pos)
        pos += lengths[i]
      } else {
        result.write(list[i], pos)
        pos += lengths[i]
      }
    }

    return result
  }
}

module.exports = generate

}, function(modId) { var map = {"./writeToStream":1682324647509}; return __REQUIRE__(map[modId], modId); })
__DEFINE__(1682324647509, function(require, module, exports) {
const protocol = require('./constants')
const empty = Buffer.allocUnsafe(0)
const zeroBuf = Buffer.from([0])
const numbers = require('./numbers')
const nextTick = require('process-nextick-args').nextTick
const debug = require('debug')('mqtt-packet:writeToStream')

const numCache = numbers.cache
const generateNumber = numbers.generateNumber
const generateCache = numbers.generateCache
const genBufVariableByteInt = numbers.genBufVariableByteInt
const generate4ByteBuffer = numbers.generate4ByteBuffer
let writeNumber = writeNumberCached
let toGenerate = true

function generate (packet, stream, opts) {
  debug('generate called')
  if (stream.cork) {
    stream.cork()
    nextTick(uncork, stream)
  }

  if (toGenerate) {
    toGenerate = false
    generateCache()
  }
  debug('generate: packet.cmd: %s', packet.cmd)
  switch (packet.cmd) {
    case 'connect':
      return connect(packet, stream, opts)
    case 'connack':
      return connack(packet, stream, opts)
    case 'publish':
      return publish(packet, stream, opts)
    case 'puback':
    case 'pubrec':
    case 'pubrel':
    case 'pubcomp':
      return confirmation(packet, stream, opts)
    case 'subscribe':
      return subscribe(packet, stream, opts)
    case 'suback':
      return suback(packet, stream, opts)
    case 'unsubscribe':
      return unsubscribe(packet, stream, opts)
    case 'unsuback':
      return unsuback(packet, stream, opts)
    case 'pingreq':
    case 'pingresp':
      return emptyPacket(packet, stream, opts)
    case 'disconnect':
      return disconnect(packet, stream, opts)
    case 'auth':
      return auth(packet, stream, opts)
    default:
      stream.emit('error', new Error('Unknown command'))
      return false
  }
}
/**
 * Controls numbers cache.
 * Set to "false" to allocate buffers on-the-flight instead of pre-generated cache
 */
Object.defineProperty(generate, 'cacheNumbers', {
  get () {
    return writeNumber === writeNumberCached
  },
  set (value) {
    if (value) {
      if (!numCache || Object.keys(numCache).length === 0) toGenerate = true
      writeNumber = writeNumberCached
    } else {
      toGenerate = false
      writeNumber = writeNumberGenerated
    }
  }
})

function uncork (stream) {
  stream.uncork()
}

function connect (packet, stream, opts) {
  const settings = packet || {}
  const protocolId = settings.protocolId || 'MQTT'
  let protocolVersion = settings.protocolVersion || 4
  const will = settings.will
  let clean = settings.clean
  const keepalive = settings.keepalive || 0
  const clientId = settings.clientId || ''
  const username = settings.username
  const password = settings.password
  /* mqtt5 new oprions */
  const properties = settings.properties

  if (clean === undefined) clean = true

  let length = 0

  // Must be a string and non-falsy
  if (!protocolId ||
     (typeof protocolId !== 'string' && !Buffer.isBuffer(protocolId))) {
    stream.emit('error', new Error('Invalid protocolId'))
    return false
  } else length += protocolId.length + 2

  // Must be 3 or 4 or 5
  if (protocolVersion !== 3 && protocolVersion !== 4 && protocolVersion !== 5) {
    stream.emit('error', new Error('Invalid protocol version'))
    return false
  } else length += 1

  // ClientId might be omitted in 3.1.1 and 5, but only if cleanSession is set to 1
  if ((typeof clientId === 'string' || Buffer.isBuffer(clientId)) &&
     (clientId || protocolVersion >= 4) && (clientId || clean)) {
    length += Buffer.byteLength(clientId) + 2
  } else {
    if (protocolVersion < 4) {
      stream.emit('error', new Error('clientId must be supplied before 3.1.1'))
      return false
    }
    if ((clean * 1) === 0) {
      stream.emit('error', new Error('clientId must be given if cleanSession set to 0'))
      return false
    }
  }

  // Must be a two byte number
  if (typeof keepalive !== 'number' ||
      keepalive < 0 ||
      keepalive > 65535 ||
      keepalive % 1 !== 0) {
    stream.emit('error', new Error('Invalid keepalive'))
    return false
  } else length += 2

  // Connect flags
  length += 1

  // Properties
  if (protocolVersion === 5) {
    var propertiesData = getProperties(stream, properties)
    if (!propertiesData) { return false }
    length += propertiesData.length
  }

  // If will exists...
  if (will) {
    // It must be an object
    if (typeof will !== 'object') {
      stream.emit('error', new Error('Invalid will'))
      return false
    }
    // It must have topic typeof string
    if (!will.topic || typeof will.topic !== 'string') {
      stream.emit('error', new Error('Invalid will topic'))
      return false
    } else {
      length += Buffer.byteLength(will.topic) + 2
    }

    // Payload
    length += 2 // payload length
    if (will.payload) {
      if (will.payload.length >= 0) {
        if (typeof will.payload === 'string') {
          length += Buffer.byteLength(will.payload)
        } else {
          length += will.payload.length
        }
      } else {
        stream.emit('error', new Error('Invalid will payload'))
        return false
      }
    }
    // will properties
    var willProperties = {}
    if (protocolVersion === 5) {
      willProperties = getProperties(stream, will.properties)
      if (!willProperties) { return false }
      length += willProperties.length
    }
  }

  // Username
  let providedUsername = false
  if (username != null) {
    if (isStringOrBuffer(username)) {
      providedUsername = true
      length += Buffer.byteLength(username) + 2
    } else {
      stream.emit('error', new Error('Invalid username'))
      return false
    }
  }

  // Password
  if (password != null) {
    if (!providedUsername) {
      stream.emit('error', new Error('Username is required to use password'))
      return false
    }

    if (isStringOrBuffer(password)) {
      length += byteLength(password) + 2
    } else {
      stream.emit('error', new Error('Invalid password'))
      return false
    }
  }

  // Generate header
  stream.write(protocol.CONNECT_HEADER)

  // Generate length
  writeVarByteInt(stream, length)

  // Generate protocol ID
  writeStringOrBuffer(stream, protocolId)

  if (settings.bridgeMode) {
    protocolVersion += 128
  }

  stream.write(
    protocolVersion === 131
      ? protocol.VERSION131
      : protocolVersion === 132
        ? protocol.VERSION132
        : protocolVersion === 4
          ? protocol.VERSION4
          : protocolVersion === 5
            ? protocol.VERSION5
            : protocol.VERSION3
  )

  // Connect flags
  let flags = 0
  flags |= (username != null) ? protocol.USERNAME_MASK : 0
  flags |= (password != null) ? protocol.PASSWORD_MASK : 0
  flags |= (will && will.retain) ? protocol.WILL_RETAIN_MASK : 0
  flags |= (will && will.qos) ? will.qos << protocol.WILL_QOS_SHIFT : 0
  flags |= will ? protocol.WILL_FLAG_MASK : 0
  flags |= clean ? protocol.CLEAN_SESSION_MASK : 0

  stream.write(Buffer.from([flags]))

  // Keepalive
  writeNumber(stream, keepalive)

  // Properties
  if (protocolVersion === 5) {
    propertiesData.write()
  }

  // Client ID
  writeStringOrBuffer(stream, clientId)

  // Will
  if (will) {
    if (protocolVersion === 5) {
      willProperties.write()
    }
    writeString(stream, will.topic)
    writeStringOrBuffer(stream, will.payload)
  }

  // Username and password
  if (username != null) {
    writeStringOrBuffer(stream, username)
  }
  if (password != null) {
    writeStringOrBuffer(stream, password)
  }
  // This is a small packet that happens only once on a stream
  // We assume the stream is always free to receive more data after this
  return true
}

function connack (packet, stream, opts) {
  const version = opts ? opts.protocolVersion : 4
  const settings = packet || {}
  const rc = version === 5 ? settings.reasonCode : settings.returnCode
  const properties = settings.properties
  let length = 2 // length of rc and sessionHeader

  // Check return code
  if (typeof rc !== 'number') {
    stream.emit('error', new Error('Invalid return code'))
    return false
  }
  // mqtt5 properties
  let propertiesData = null
  if (version === 5) {
    propertiesData = getProperties(stream, properties)
    if (!propertiesData) { return false }
    length += propertiesData.length
  }

  stream.write(protocol.CONNACK_HEADER)
  // length
  writeVarByteInt(stream, length)
  stream.write(settings.sessionPresent ? protocol.SESSIONPRESENT_HEADER : zeroBuf)

  stream.write(Buffer.from([rc]))
  if (propertiesData != null) {
    propertiesData.write()
  }
  return true
}

function publish (packet, stream, opts) {
  debug('publish: packet: %o', packet)
  const version = opts ? opts.protocolVersion : 4
  const settings = packet || {}
  const qos = settings.qos || 0
  const retain = settings.retain ? protocol.RETAIN_MASK : 0
  const topic = settings.topic
  const payload = settings.payload || empty
  const id = settings.messageId
  const properties = settings.properties

  let length = 0

  // Topic must be a non-empty string or Buffer
  if (typeof topic === 'string') length += Buffer.byteLength(topic) + 2
  else if (Buffer.isBuffer(topic)) length += topic.length + 2
  else {
    stream.emit('error', new Error('Invalid topic'))
    return false
  }

  // Get the payload length
  if (!Buffer.isBuffer(payload)) length += Buffer.byteLength(payload)
  else length += payload.length

  // Message ID must a number if qos > 0
  if (qos && typeof id !== 'number') {
    stream.emit('error', new Error('Invalid messageId'))
    return false
  } else if (qos) length += 2

  // mqtt5 properties
  let propertiesData = null
  if (version === 5) {
    propertiesData = getProperties(stream, properties)
    if (!propertiesData) { return false }
    length += propertiesData.length
  }

  // Header
  stream.write(protocol.PUBLISH_HEADER[qos][settings.dup ? 1 : 0][retain ? 1 : 0])

  // Remaining length
  writeVarByteInt(stream, length)

  // Topic
  writeNumber(stream, byteLength(topic))
  stream.write(topic)

  // Message ID
  if (qos > 0) writeNumber(stream, id)

  // Properties
  if (propertiesData != null) {
    propertiesData.write()
  }

  // Payload
  debug('publish: payload: %o', payload)
  return stream.write(payload)
}

/* Puback, pubrec, pubrel and pubcomp */
function confirmation (packet, stream, opts) {
  const version = opts ? opts.protocolVersion : 4
  const settings = packet || {}
  const type = settings.cmd || 'puback'
  const id = settings.messageId
  const dup = (settings.dup && type === 'pubrel') ? protocol.DUP_MASK : 0
  let qos = 0
  const reasonCode = settings.reasonCode
  const properties = settings.properties
  let length = version === 5 ? 3 : 2

  if (type === 'pubrel') qos = 1

  // Check message ID
  if (typeof id !== 'number') {
    stream.emit('error', new Error('Invalid messageId'))
    return false
  }

  // properies mqtt 5
  let propertiesData = null
  if (version === 5) {
    // Confirm should not add empty property length with no properties (rfc 3.4.2.2.1)
    if (typeof properties === 'object') {
      propertiesData = getPropertiesByMaximumPacketSize(stream, properties, opts, length)
      if (!propertiesData) { return false }
      length += propertiesData.length
    }
  }

  // Header
  stream.write(protocol.ACKS[type][qos][dup][0])

  // Length
  writeVarByteInt(stream, length)

  // Message ID
  writeNumber(stream, id)

  // reason code in header
  if (version === 5) {
    stream.write(Buffer.from([reasonCode]))
  }

  // properies mqtt 5
  if (propertiesData !== null) {
    propertiesData.write()
  }
  return true
}

function subscribe (packet, stream, opts) {
  debug('subscribe: packet: ')
  const version = opts ? opts.protocolVersion : 4
  const settings = packet || {}
  const dup = settings.dup ? protocol.DUP_MASK : 0
  const id = settings.messageId
  const subs = settings.subscriptions
  const properties = settings.properties

  let length = 0

  // Check message ID
  if (typeof id !== 'number') {
    stream.emit('error', new Error('Invalid messageId'))
    return false
  } else length += 2

  // properies mqtt 5
  let propertiesData = null
  if (version === 5) {
    propertiesData = getProperties(stream, properties)
    if (!propertiesData) { return false }
    length += propertiesData.length
  }

  // Check subscriptions
  if (typeof subs === 'object' && subs.length) {
    for (let i = 0; i < subs.length; i += 1) {
      const itopic = subs[i].topic
      const iqos = subs[i].qos

      if (typeof itopic !== 'string') {
        stream.emit('error', new Error('Invalid subscriptions - invalid topic'))
        return false
      }
      if (typeof iqos !== 'number') {
        stream.emit('error', new Error('Invalid subscriptions - invalid qos'))
        return false
      }

      if (version === 5) {
        const nl = subs[i].nl || false
        if (typeof nl !== 'boolean') {
          stream.emit('error', new Error('Invalid subscriptions - invalid No Local'))
          return false
        }
        const rap = subs[i].rap || false
        if (typeof rap !== 'boolean') {
          stream.emit('error', new Error('Invalid subscriptions - invalid Retain as Published'))
          return false
        }
        const rh = subs[i].rh || 0
        if (typeof rh !== 'number' || rh > 2) {
          stream.emit('error', new Error('Invalid subscriptions - invalid Retain Handling'))
          return false
        }
      }

      length += Buffer.byteLength(itopic) + 2 + 1
    }
  } else {
    stream.emit('error', new Error('Invalid subscriptions'))
    return false
  }

  // Generate header
  debug('subscribe: writing to stream: %o', protocol.SUBSCRIBE_HEADER)
  stream.write(protocol.SUBSCRIBE_HEADER[1][dup ? 1 : 0][0])

  // Generate length
  writeVarByteInt(stream, length)

  // Generate message ID
  writeNumber(stream, id)

  // properies mqtt 5
  if (propertiesData !== null) {
    propertiesData.write()
  }

  let result = true

  // Generate subs
  for (const sub of subs) {
    const jtopic = sub.topic
    const jqos = sub.qos
    const jnl = +sub.nl
    const jrap = +sub.rap
    const jrh = sub.rh
    let joptions

    // Write topic string
    writeString(stream, jtopic)

    // options process
    joptions = protocol.SUBSCRIBE_OPTIONS_QOS[jqos]
    if (version === 5) {
      joptions |= jnl ? protocol.SUBSCRIBE_OPTIONS_NL : 0
      joptions |= jrap ? protocol.SUBSCRIBE_OPTIONS_RAP : 0
      joptions |= jrh ? protocol.SUBSCRIBE_OPTIONS_RH[jrh] : 0
    }
    // Write options
    result = stream.write(Buffer.from([joptions]))
  }

  return result
}

function suback (packet, stream, opts) {
  const version = opts ? opts.protocolVersion : 4
  const settings = packet || {}
  const id = settings.messageId
  const granted = settings.granted
  const properties = settings.properties
  let length = 0

  // Check message ID
  if (typeof id !== 'number') {
    stream.emit('error', new Error('Invalid messageId'))
    return false
  } else length += 2

  // Check granted qos vector
  if (typeof granted === 'object' && granted.length) {
    for (let i = 0; i < granted.length; i += 1) {
      if (typeof granted[i] !== 'number') {
        stream.emit('error', new Error('Invalid qos vector'))
        return false
      }
      length += 1
    }
  } else {
    stream.emit('error', new Error('Invalid qos vector'))
    return false
  }

  // properies mqtt 5
  let propertiesData = null
  if (version === 5) {
    propertiesData = getPropertiesByMaximumPacketSize(stream, properties, opts, length)
    if (!propertiesData) { return false }
    length += propertiesData.length
  }

  // header
  stream.write(protocol.SUBACK_HEADER)

  // Length
  writeVarByteInt(stream, length)

  // Message ID
  writeNumber(stream, id)

  // properies mqtt 5
  if (propertiesData !== null) {
    propertiesData.write()
  }

  return stream.write(Buffer.from(granted))
}

function unsubscribe (packet, stream, opts) {
  const version = opts ? opts.protocolVersion : 4
  const settings = packet || {}
  const id = settings.messageId
  const dup = settings.dup ? protocol.DUP_MASK : 0
  const unsubs = settings.unsubscriptions
  const properties = settings.properties

  let length = 0

  // Check message ID
  if (typeof id !== 'number') {
    stream.emit('error', new Error('Invalid messageId'))
    return false
  } else {
    length += 2
  }
  // Check unsubs
  if (typeof unsubs === 'object' && unsubs.length) {
    for (let i = 0; i < unsubs.length; i += 1) {
      if (typeof unsubs[i] !== 'string') {
        stream.emit('error', new Error('Invalid unsubscriptions'))
        return false
      }
      length += Buffer.byteLength(unsubs[i]) + 2
    }
  } else {
    stream.emit('error', new Error('Invalid unsubscriptions'))
    return false
  }
  // properies mqtt 5
  let propertiesData = null
  if (version === 5) {
    propertiesData = getProperties(stream, properties)
    if (!propertiesData) { return false }
    length += propertiesData.length
  }

  // Header
  stream.write(protocol.UNSUBSCRIBE_HEADER[1][dup ? 1 : 0][0])

  // Length
  writeVarByteInt(stream, length)

  // Message ID
  writeNumber(stream, id)

  // properies mqtt 5
  if (propertiesData !== null) {
    propertiesData.write()
  }

  // Unsubs
  let result = true
  for (let j = 0; j < unsubs.length; j++) {
    result = writeString(stream, unsubs[j])
  }

  return result
}

function unsuback (packet, stream, opts) {
  const version = opts ? opts.protocolVersion : 4
  const settings = packet || {}
  const id = settings.messageId
  const dup = settings.dup ? protocol.DUP_MASK : 0
  const granted = settings.granted
  const properties = settings.properties
  const type = settings.cmd
  const qos = 0

  let length = 2

  // Check message ID
  if (typeof id !== 'number') {
    stream.emit('error', new Error('Invalid messageId'))
    return false
  }

  // Check granted
  if (version === 5) {
    if (typeof granted === 'object' && granted.length) {
      for (let i = 0; i < granted.length; i += 1) {
        if (typeof granted[i] !== 'number') {
          stream.emit('error', new Error('Invalid qos vector'))
          return false
        }
        length += 1
      }
    } else {
      stream.emit('error', new Error('Invalid qos vector'))
      return false
    }
  }

  // properies mqtt 5
  let propertiesData = null
  if (version === 5) {
    propertiesData = getPropertiesByMaximumPacketSize(stream, properties, opts, length)
    if (!propertiesData) { return false }
    length += propertiesData.length
  }

  // Header
  stream.write(protocol.ACKS[type][qos][dup][0])

  // Length
  writeVarByteInt(stream, length)

  // Message ID
  writeNumber(stream, id)

  // properies mqtt 5
  if (propertiesData !== null) {
    propertiesData.write()
  }

  // payload
  if (version === 5) {
    stream.write(Buffer.from(granted))
  }
  return true
}

function emptyPacket (packet, stream, opts) {
  return stream.write(protocol.EMPTY[packet.cmd])
}

function disconnect (packet, stream, opts) {
  const version = opts ? opts.protocolVersion : 4
  const settings = packet || {}
  const reasonCode = settings.reasonCode
  const properties = settings.properties
  let length = version === 5 ? 1 : 0

  // properies mqtt 5
  let propertiesData = null
  if (version === 5) {
    propertiesData = getPropertiesByMaximumPacketSize(stream, properties, opts, length)
    if (!propertiesData) { return false }
    length += propertiesData.length
  }

  // Header
  stream.write(Buffer.from([protocol.codes.disconnect << 4]))

  // Length
  writeVarByteInt(stream, length)

  // reason code in header
  if (version === 5) {
    stream.write(Buffer.from([reasonCode]))
  }

  // properies mqtt 5
  if (propertiesData !== null) {
    propertiesData.write()
  }

  return true
}

function auth (packet, stream, opts) {
  const version = opts ? opts.protocolVersion : 4
  const settings = packet || {}
  const reasonCode = settings.reasonCode
  const properties = settings.properties
  let length = version === 5 ? 1 : 0

  if (version !== 5) stream.emit('error', new Error('Invalid mqtt version for auth packet'))

  // properies mqtt 5
  const propertiesData = getPropertiesByMaximumPacketSize(stream, properties, opts, length)
  if (!propertiesData) { return false }
  length += propertiesData.length

  // Header
  stream.write(Buffer.from([protocol.codes.auth << 4]))

  // Length
  writeVarByteInt(stream, length)

  // reason code in header
  stream.write(Buffer.from([reasonCode]))

  // properies mqtt 5
  if (propertiesData !== null) {
    propertiesData.write()
  }
  return true
}

/**
 * writeVarByteInt - write an MQTT style variable byte integer to the buffer
 *
 * @param <Buffer> buffer - destination
 * @param <Number> pos - offset
 * @param <Number> length - length (>0)
 * @returns <Number> number of bytes written
 *
 * @api private
 */

const varByteIntCache = {}
function writeVarByteInt (stream, num) {
  if (num > protocol.VARBYTEINT_MAX) {
    stream.emit('error', new Error(`Invalid variable byte integer: ${num}`))
    return false
  }

  let buffer = varByteIntCache[num]

  if (!buffer) {
    buffer = genBufVariableByteInt(num)
    if (num < 16384) varByteIntCache[num] = buffer
  }
  debug('writeVarByteInt: writing to stream: %o', buffer)
  return stream.write(buffer)
}

/**
 * writeString - write a utf8 string to the buffer
 *
 * @param <Buffer> buffer - destination
 * @param <Number> pos - offset
 * @param <String> string - string to write
 * @return <Number> number of bytes written
 *
 * @api private
 */

function writeString (stream, string) {
  const strlen = Buffer.byteLength(string)
  writeNumber(stream, strlen)

  debug('writeString: %s', string)
  return stream.write(string, 'utf8')
}

/**
 * writeStringPair - write a utf8 string pairs to the buffer
 *
 * @param <Buffer> buffer - destination
 * @param <String> name - string name to write
 * @param <String> value - string value to write
 * @return <Number> number of bytes written
 *
 * @api private
 */
function writeStringPair (stream, name, value) {
  writeString(stream, name)
  writeString(stream, value)
}

/**
 * writeNumber - write a two byte number to the buffer
 *
 * @param <Buffer> buffer - destination
 * @param <Number> pos - offset
 * @param <String> number - number to write
 * @return <Number> number of bytes written
 *
 * @api private
 */
function writeNumberCached (stream, number) {
  debug('writeNumberCached: number: %d', number)
  debug('writeNumberCached: %o', numCache[number])
  return stream.write(numCache[number])
}
function writeNumberGenerated (stream, number) {
  const generatedNumber = generateNumber(number)
  debug('writeNumberGenerated: %o', generatedNumber)
  return stream.write(generatedNumber)
}
function write4ByteNumber (stream, number) {
  const generated4ByteBuffer = generate4ByteBuffer(number)
  debug('write4ByteNumber: %o', generated4ByteBuffer)
  return stream.write(generated4ByteBuffer)
}
/**
 * writeStringOrBuffer - write a String or Buffer with the its length prefix
 *
 * @param <Buffer> buffer - destination
 * @param <Number> pos - offset
 * @param <String> toWrite - String or Buffer
 * @return <Number> number of bytes written
 */
function writeStringOrBuffer (stream, toWrite) {
  if (typeof toWrite === 'string') {
    writeString(stream, toWrite)
  } else if (toWrite) {
    writeNumber(stream, toWrite.length)
    stream.write(toWrite)
  } else writeNumber(stream, 0)
}

function getProperties (stream, properties) {
  /* connect properties */
  if (typeof properties !== 'object' || properties.length != null) {
    return {
      length: 1,
      write () {
        writeProperties(stream, {}, 0)
      }
    }
  }
  let propertiesLength = 0
  function getLengthProperty (name, value) {
    const type = protocol.propertiesTypes[name]
    let length = 0
    switch (type) {
      case 'byte': {
        if (typeof value !== 'boolean') {
          stream.emit('error', new Error(`Invalid ${name}: ${value}`))
          return false
        }
        length += 1 + 1
        break
      }
      case 'int8': {
        if (typeof value !== 'number' || value < 0 || value > 0xff) {
          stream.emit('error', new Error(`Invalid ${name}: ${value}`))
          return false
        }
        length += 1 + 1
        break
      }
      case 'binary': {
        if (value && value === null) {
          stream.emit('error', new Error(`Invalid ${name}: ${value}`))
          return false
        }
        length += 1 + Buffer.byteLength(value) + 2
        break
      }
      case 'int16': {
        if (typeof value !== 'number' || value < 0 || value > 0xffff) {
          stream.emit('error', new Error(`Invalid ${name}: ${value}`))
          return false
        }
        length += 1 + 2
        break
      }
      case 'int32': {
        if (typeof value !== 'number' || value < 0 || value > 0xffffffff) {
          stream.emit('error', new Error(`Invalid ${name}: ${value}`))
          return false
        }
        length += 1 + 4
        break
      }
      case 'var': {
        // var byte integer is max 24 bits packed in 32 bits
        if (typeof value !== 'number' || value < 0 || value > 0x0fffffff) {
          stream.emit('error', new Error(`Invalid ${name}: ${value}`))
          return false
        }
        length += 1 + Buffer.byteLength(genBufVariableByteInt(value))
        break
      }
      case 'string': {
        if (typeof value !== 'string') {
          stream.emit('error', new Error(`Invalid ${name}: ${value}`))
          return false
        }
        length += 1 + 2 + Buffer.byteLength(value.toString())
        break
      }
      case 'pair': {
        if (typeof value !== 'object') {
          stream.emit('error', new Error(`Invalid ${name}: ${value}`))
          return false
        }
        length += Object.getOwnPropertyNames(value).reduce((result, name) => {
          const currentValue = value[name]
          if (Array.isArray(currentValue)) {
            result += currentValue.reduce((currentLength, value) => {
              currentLength += 1 + 2 + Buffer.byteLength(name.toString()) + 2 + Buffer.byteLength(value.toString())
              return currentLength
            }, 0)
          } else {
            result += 1 + 2 + Buffer.byteLength(name.toString()) + 2 + Buffer.byteLength(value[name].toString())
          }
          return result
        }, 0)
        break
      }
      default: {
        stream.emit('error', new Error(`Invalid property ${name}: ${value}`))
        return false
      }
    }
    return length
  }
  if (properties) {
    for (const propName in properties) {
      let propLength = 0
      let propValueLength = 0
      const propValue = properties[propName]
      if (Array.isArray(propValue)) {
        for (let valueIndex = 0; valueIndex < propValue.length; valueIndex++) {
          propValueLength = getLengthProperty(propName, propValue[valueIndex])
          if (!propValueLength) { return false }
          propLength += propValueLength
        }
      } else {
        propValueLength = getLengthProperty(propName, propValue)
        if (!propValueLength) { return false }
        propLength = propValueLength
      }
      if (!propLength) return false
      propertiesLength += propLength
    }
  }
  const propertiesLengthLength = Buffer.byteLength(genBufVariableByteInt(propertiesLength))

  return {
    length: propertiesLengthLength + propertiesLength,
    write () {
      writeProperties(stream, properties, propertiesLength)
    }
  }
}

function getPropertiesByMaximumPacketSize (stream, properties, opts, length) {
  const mayEmptyProps = ['reasonString', 'userProperties']
  const maximumPacketSize = opts && opts.properties && opts.properties.maximumPacketSize ? opts.properties.maximumPacketSize : 0

  let propertiesData = getProperties(stream, properties)
  if (maximumPacketSize) {
    while (length + propertiesData.length > maximumPacketSize) {
      const currentMayEmptyProp = mayEmptyProps.shift()
      if (currentMayEmptyProp && properties[currentMayEmptyProp]) {
        delete properties[currentMayEmptyProp]
        propertiesData = getProperties(stream, properties)
      } else {
        return false
      }
    }
  }
  return propertiesData
}

function writeProperty (stream, propName, value) {
  const type = protocol.propertiesTypes[propName]
  switch (type) {
    case 'byte': {
      stream.write(Buffer.from([protocol.properties[propName]]))
      stream.write(Buffer.from([+value]))
      break
    }
    case 'int8': {
      stream.write(Buffer.from([protocol.properties[propName]]))
      stream.write(Buffer.from([value]))
      break
    }
    case 'binary': {
      stream.write(Buffer.from([protocol.properties[propName]]))
      writeStringOrBuffer(stream, value)
      break
    }
    case 'int16': {
      stream.write(Buffer.from([protocol.properties[propName]]))
      writeNumber(stream, value)
      break
    }
    case 'int32': {
      stream.write(Buffer.from([protocol.properties[propName]]))
      write4ByteNumber(stream, value)
      break
    }
    case 'var': {
      stream.write(Buffer.from([protocol.properties[propName]]))
      writeVarByteInt(stream, value)
      break
    }
    case 'string': {
      stream.write(Buffer.from([protocol.properties[propName]]))
      writeString(stream, value)
      break
    }
    case 'pair': {
      Object.getOwnPropertyNames(value).forEach(name => {
        const currentValue = value[name]
        if (Array.isArray(currentValue)) {
          currentValue.forEach(value => {
            stream.write(Buffer.from([protocol.properties[propName]]))
            writeStringPair(stream, name.toString(), value.toString())
          })
        } else {
          stream.write(Buffer.from([protocol.properties[propName]]))
          writeStringPair(stream, name.toString(), currentValue.toString())
        }
      })
      break
    }
    default: {
      stream.emit('error', new Error(`Invalid property ${propName} value: ${value}`))
      return false
    }
  }
}

function writeProperties (stream, properties, propertiesLength) {
  /* write properties to stream */
  writeVarByteInt(stream, propertiesLength)
  for (const propName in properties) {
    if (Object.prototype.hasOwnProperty.call(properties, propName) && properties[propName] !== null) {
      const value = properties[propName]
      if (Array.isArray(value)) {
        for (let valueIndex = 0; valueIndex < value.length; valueIndex++) {
          writeProperty(stream, propName, value[valueIndex])
        }
      } else {
        writeProperty(stream, propName, value)
      }
    }
  }
}

function byteLength (bufOrString) {
  if (!bufOrString) return 0
  else if (bufOrString instanceof Buffer) return bufOrString.length
  else return Buffer.byteLength(bufOrString)
}

function isStringOrBuffer (field) {
  return typeof field === 'string' || field instanceof Buffer
}

module.exports = generate

}, function(modId) { var map = {"./constants":1682324647507,"./numbers":1682324647510}; return __REQUIRE__(map[modId], modId); })
__DEFINE__(1682324647510, function(require, module, exports) {
const max = 65536
const cache = {}

// in node 6 Buffer.subarray returns a Uint8Array instead of a Buffer
// later versions return a Buffer
// alternative is Buffer.slice but that creates a new buffer
// creating new buffers takes time
// SubOk is only false on node < 8
const SubOk = Buffer.isBuffer(Buffer.from([1, 2]).subarray(0, 1))

function generateBuffer (i) {
  const buffer = Buffer.allocUnsafe(2)
  buffer.writeUInt8(i >> 8, 0)
  buffer.writeUInt8(i & 0x00FF, 0 + 1)

  return buffer
}

function generateCache () {
  for (let i = 0; i < max; i++) {
    cache[i] = generateBuffer(i)
  }
}

function genBufVariableByteInt (num) {
  const maxLength = 4 // max 4 bytes
  let digit = 0
  let pos = 0
  const buffer = Buffer.allocUnsafe(maxLength)

  do {
    digit = num % 128 | 0
    num = num / 128 | 0
    if (num > 0) digit = digit | 0x80

    buffer.writeUInt8(digit, pos++)
  } while (num > 0 && pos < maxLength)

  if (num > 0) {
    pos = 0
  }

  return SubOk ? buffer.subarray(0, pos) : buffer.slice(0, pos)
}

function generate4ByteBuffer (num) {
  const buffer = Buffer.allocUnsafe(4)
  buffer.writeUInt32BE(num, 0)
  return buffer
}

module.exports = {
  cache,
  generateCache,
  generateNumber: generateBuffer,
  genBufVariableByteInt,
  generate4ByteBuffer
}

}, function(modId) { var map = {}; return __REQUIRE__(map[modId], modId); })
return __REQUIRE__(1682324647504);
})()
//miniprogram-npm-outsideDeps=["bl","events","debug","process-nextick-args"]
//# sourceMappingURL=index.js.map