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adapters = {\n  logger: self.console,\n  WebSocket: self.WebSocket\n};\n\nvar logger = {\n  log(...messages) {\n    if (this.enabled) {\n      messages.push(Date.now());\n      adapters.logger.log(\"[ActionCable]\", ...messages);\n    }\n  }\n};\n\nconst now = () => (new Date).getTime();\n\nconst secondsSince = time => (now() - time) / 1e3;\n\nclass ConnectionMonitor {\n  constructor(connection) {\n    this.visibilityDidChange = this.visibilityDidChange.bind(this);\n    this.connection = connection;\n    this.reconnectAttempts = 0;\n  }\n  start() {\n    if (!this.isRunning()) {\n      this.startedAt = now();\n      delete this.stoppedAt;\n      this.startPolling();\n      addEventListener(\"visibilitychange\", this.visibilityDidChange);\n      logger.log(`ConnectionMonitor started. stale threshold = ${this.constructor.staleThreshold} s`);\n    }\n  }\n  stop() {\n    if (this.isRunning()) {\n      this.stoppedAt = now();\n      this.stopPolling();\n      removeEventListener(\"visibilitychange\", this.visibilityDidChange);\n      logger.log(\"ConnectionMonitor stopped\");\n    }\n  }\n  isRunning() {\n    return this.startedAt && !this.stoppedAt;\n  }\n  recordPing() {\n    this.pingedAt = now();\n  }\n  recordConnect() {\n    this.reconnectAttempts = 0;\n    this.recordPing();\n    delete this.disconnectedAt;\n    logger.log(\"ConnectionMonitor recorded connect\");\n  }\n  recordDisconnect() {\n    this.disconnectedAt = now();\n    logger.log(\"ConnectionMonitor recorded disconnect\");\n  }\n  startPolling() {\n    this.stopPolling();\n    this.poll();\n  }\n  stopPolling() {\n    clearTimeout(this.pollTimeout);\n  }\n  poll() {\n    this.pollTimeout = setTimeout((() => {\n      this.reconnectIfStale();\n      this.poll();\n    }), this.getPollInterval());\n  }\n  getPollInterval() {\n    const {staleThreshold: staleThreshold, reconnectionBackoffRate: reconnectionBackoffRate} = this.constructor;\n    const backoff = Math.pow(1 + reconnectionBackoffRate, Math.min(this.reconnectAttempts, 10));\n    const jitterMax = this.reconnectAttempts === 0 ? 1 : reconnectionBackoffRate;\n    const jitter = jitterMax * Math.random();\n    return staleThreshold * 1e3 * backoff * (1 + jitter);\n  }\n  reconnectIfStale() {\n    if (this.connectionIsStale()) {\n      logger.log(`ConnectionMonitor detected stale connection. reconnectAttempts = ${this.reconnectAttempts}, time stale = ${secondsSince(this.refreshedAt)} s, stale threshold = ${this.constructor.staleThreshold} s`);\n      this.reconnectAttempts++;\n      if (this.disconnectedRecently()) {\n        logger.log(`ConnectionMonitor skipping reopening recent disconnect. time disconnected = ${secondsSince(this.disconnectedAt)} s`);\n      } else {\n        logger.log(\"ConnectionMonitor reopening\");\n        this.connection.reopen();\n      }\n    }\n  }\n  get refreshedAt() {\n    return this.pingedAt ? this.pingedAt : this.startedAt;\n  }\n  connectionIsStale() {\n    return secondsSince(this.refreshedAt) > this.constructor.staleThreshold;\n  }\n  disconnectedRecently() {\n    return this.disconnectedAt && secondsSince(this.disconnectedAt) < this.constructor.staleThreshold;\n  }\n  visibilityDidChange() {\n    if (document.visibilityState === \"visible\") {\n      setTimeout((() => {\n        if (this.connectionIsStale() || !this.connection.isOpen()) {\n          logger.log(`ConnectionMonitor reopening stale connection on visibilitychange. visibilityState = ${document.visibilityState}`);\n          this.connection.reopen();\n        }\n      }), 200);\n    }\n  }\n}\n\nConnectionMonitor.staleThreshold = 6;\n\nConnectionMonitor.reconnectionBackoffRate = .15;\n\nvar INTERNAL = {\n  message_types: {\n    welcome: \"welcome\",\n    disconnect: \"disconnect\",\n    ping: \"ping\",\n    confirmation: \"confirm_subscription\",\n    rejection: \"reject_subscription\"\n  },\n  disconnect_reasons: {\n    unauthorized: \"unauthorized\",\n    invalid_request: \"invalid_request\",\n    server_restart: \"server_restart\"\n  },\n  default_mount_path: \"/cable\",\n  protocols: [ \"actioncable-v1-json\", \"actioncable-unsupported\" ]\n};\n\nconst {message_types: message_types, protocols: protocols} = INTERNAL;\n\nconst supportedProtocols = protocols.slice(0, protocols.length - 1);\n\nconst indexOf = [].indexOf;\n\nclass Connection {\n  constructor(consumer) {\n    this.open = this.open.bind(this);\n    this.consumer = consumer;\n    this.subscriptions = this.consumer.subscriptions;\n    this.monitor = new ConnectionMonitor(this);\n    this.disconnected = true;\n  }\n  send(data) {\n    if (this.isOpen()) {\n      this.webSocket.send(JSON.stringify(data));\n      return true;\n    } else {\n      return false;\n    }\n  }\n  open() {\n    if (this.isActive()) {\n      logger.log(`Attempted to open WebSocket, but existing socket is ${this.getState()}`);\n      return false;\n    } else {\n      logger.log(`Opening WebSocket, current state is ${this.getState()}, subprotocols: ${protocols}`);\n      if (this.webSocket) {\n        this.uninstallEventHandlers();\n      }\n      this.webSocket = new adapters.WebSocket(this.consumer.url, protocols);\n      this.installEventHandlers();\n      this.monitor.start();\n      return true;\n    }\n  }\n  close({allowReconnect: allowReconnect} = {\n    allowReconnect: true\n  }) {\n    if (!allowReconnect) {\n      this.monitor.stop();\n    }\n    if (this.isOpen()) {\n      return this.webSocket.close();\n    }\n  }\n  reopen() {\n    logger.log(`Reopening WebSocket, current state is ${this.getState()}`);\n    if (this.isActive()) {\n      try {\n        return this.close();\n      } catch (error) {\n        logger.log(\"Failed to reopen WebSocket\", error);\n      } finally {\n        logger.log(`Reopening WebSocket in ${this.constructor.reopenDelay}ms`);\n        setTimeout(this.open, this.constructor.reopenDelay);\n      }\n    } else {\n      return this.open();\n    }\n  }\n  getProtocol() {\n    if (this.webSocket) {\n      return this.webSocket.protocol;\n    }\n  }\n  isOpen() {\n    return this.isState(\"open\");\n  }\n  isActive() {\n    return this.isState(\"open\", \"connecting\");\n  }\n  isProtocolSupported() {\n    return indexOf.call(supportedProtocols, this.getProtocol()) >= 0;\n  }\n  isState(...states) {\n    return indexOf.call(states, this.getState()) >= 0;\n  }\n  getState() {\n    if (this.webSocket) {\n      for (let state in adapters.WebSocket) {\n        if (adapters.WebSocket[state] === this.webSocket.readyState) {\n          return state.toLowerCase();\n        }\n      }\n    }\n    return null;\n  }\n  installEventHandlers() {\n    for (let eventName in this.events) {\n      const handler = this.events[eventName].bind(this);\n      this.webSocket[`on${eventName}`] = handler;\n    }\n  }\n  uninstallEventHandlers() {\n    for (let eventName in this.events) {\n      this.webSocket[`on${eventName}`] = function() {};\n    }\n  }\n}\n\nConnection.reopenDelay = 500;\n\nConnection.prototype.events = {\n  message(event) {\n    if (!this.isProtocolSupported()) {\n      return;\n    }\n    const {identifier: identifier, message: message, reason: reason, reconnect: reconnect, type: type} = JSON.parse(event.data);\n    switch (type) {\n     case message_types.welcome:\n      this.monitor.recordConnect();\n      return this.subscriptions.reload();\n\n     case message_types.disconnect:\n      logger.log(`Disconnecting. Reason: ${reason}`);\n      return this.close({\n        allowReconnect: reconnect\n      });\n\n     case message_types.ping:\n      return this.monitor.recordPing();\n\n     case message_types.confirmation:\n      this.subscriptions.confirmSubscription(identifier);\n      return this.subscriptions.notify(identifier, \"connected\");\n\n     case message_types.rejection:\n      return this.subscriptions.reject(identifier);\n\n     default:\n      return this.subscriptions.notify(identifier, \"received\", message);\n    }\n  },\n  open() {\n    logger.log(`WebSocket onopen event, using '${this.getProtocol()}' subprotocol`);\n    this.disconnected = false;\n    if (!this.isProtocolSupported()) {\n      logger.log(\"Protocol is unsupported. Stopping monitor and disconnecting.\");\n      return this.close({\n        allowReconnect: false\n      });\n    }\n  },\n  close(event) {\n    logger.log(\"WebSocket onclose event\");\n    if (this.disconnected) {\n      return;\n    }\n    this.disconnected = true;\n    this.monitor.recordDisconnect();\n    return this.subscriptions.notifyAll(\"disconnected\", {\n      willAttemptReconnect: this.monitor.isRunning()\n    });\n  },\n  error() {\n    logger.log(\"WebSocket onerror event\");\n  }\n};\n\nconst extend = function(object, properties) {\n  if (properties != null) {\n    for (let key in properties) {\n      const value = properties[key];\n      object[key] = value;\n    }\n  }\n  return object;\n};\n\nclass Subscription {\n  constructor(consumer, params = {}, mixin) {\n    this.consumer = consumer;\n    this.identifier = JSON.stringify(params);\n    extend(this, mixin);\n  }\n  perform(action, data = {}) {\n    data.action = action;\n    return this.send(data);\n  }\n  send(data) {\n    return this.consumer.send({\n      command: \"message\",\n      identifier: this.identifier,\n      data: JSON.stringify(data)\n    });\n  }\n  unsubscribe() {\n    return this.consumer.subscriptions.remove(this);\n  }\n}\n\nclass SubscriptionGuarantor {\n  constructor(subscriptions) {\n    this.subscriptions = subscriptions;\n    this.pendingSubscriptions = [];\n  }\n  guarantee(subscription) {\n    if (this.pendingSubscriptions.indexOf(subscription) == -1) {\n      logger.log(`SubscriptionGuarantor guaranteeing ${subscription.identifier}`);\n      this.pendingSubscriptions.push(subscription);\n    } else {\n      logger.log(`SubscriptionGuarantor already guaranteeing ${subscription.identifier}`);\n    }\n    this.startGuaranteeing();\n  }\n  forget(subscription) {\n    logger.log(`SubscriptionGuarantor forgetting ${subscription.identifier}`);\n    this.pendingSubscriptions = this.pendingSubscriptions.filter((s => s !== subscription));\n  }\n  startGuaranteeing() {\n    this.stopGuaranteeing();\n    this.retrySubscribing();\n  }\n  stopGuaranteeing() {\n    clearTimeout(this.retryTimeout);\n  }\n  retrySubscribing() {\n    this.retryTimeout = setTimeout((() => {\n      if (this.subscriptions && typeof this.subscriptions.subscribe === \"function\") {\n        this.pendingSubscriptions.map((subscription => {\n          logger.log(`SubscriptionGuarantor resubscribing ${subscription.identifier}`);\n          this.subscriptions.subscribe(subscription);\n        }));\n      }\n    }), 500);\n  }\n}\n\nclass Subscriptions {\n  constructor(consumer) {\n    this.consumer = consumer;\n    this.guarantor = new SubscriptionGuarantor(this);\n    this.subscriptions = [];\n  }\n  create(channelName, mixin) {\n    const channel = channelName;\n    const params = typeof channel === \"object\" ? channel : {\n      channel: channel\n    };\n    const subscription = new Subscription(this.consumer, params, mixin);\n    return this.add(subscription);\n  }\n  add(subscription) {\n    this.subscriptions.push(subscription);\n    this.consumer.ensureActiveConnection();\n    this.notify(subscription, \"initialized\");\n    this.subscribe(subscription);\n    return subscription;\n  }\n  remove(subscription) {\n    this.forget(subscription);\n    if (!this.findAll(subscription.identifier).length) {\n      this.sendCommand(subscription, \"unsubscribe\");\n    }\n    return subscription;\n  }\n  reject(identifier) {\n    return this.findAll(identifier).map((subscription => {\n      this.forget(subscription);\n      this.notify(subscription, \"rejected\");\n      return subscription;\n    }));\n  }\n  forget(subscription) {\n    this.guarantor.forget(subscription);\n    this.subscriptions = this.subscriptions.filter((s => s !== subscription));\n    return subscription;\n  }\n  findAll(identifier) {\n    return this.subscriptions.filter((s => s.identifier === identifier));\n  }\n  reload() {\n    return this.subscriptions.map((subscription => this.subscribe(subscription)));\n  }\n  notifyAll(callbackName, ...args) {\n    return this.subscriptions.map((subscription => this.notify(subscription, callbackName, ...args)));\n  }\n  notify(subscription, callbackName, ...args) {\n    let subscriptions;\n    if (typeof subscription === \"string\") {\n      subscriptions = this.findAll(subscription);\n    } else {\n      subscriptions = [ subscription ];\n    }\n    return subscriptions.map((subscription => typeof subscription[callbackName] === \"function\" ? subscription[callbackName](...args) : undefined));\n  }\n  subscribe(subscription) {\n    if (this.sendCommand(subscription, \"subscribe\")) {\n      this.guarantor.guarantee(subscription);\n    }\n  }\n  confirmSubscription(identifier) {\n    logger.log(`Subscription confirmed ${identifier}`);\n    this.findAll(identifier).map((subscription => this.guarantor.forget(subscription)));\n  }\n  sendCommand(subscription, command) {\n    const {identifier: identifier} = subscription;\n    return this.consumer.send({\n      command: command,\n      identifier: identifier\n    });\n  }\n}\n\nclass Consumer {\n  constructor(url) {\n    this._url = url;\n    this.subscriptions = new Subscriptions(this);\n    this.connection = new Connection(this);\n  }\n  get url() {\n    return createWebSocketURL(this._url);\n  }\n  send(data) {\n    return this.connection.send(data);\n  }\n  connect() {\n    return this.connection.open();\n  }\n  disconnect() {\n    return this.connection.close({\n      allowReconnect: false\n    });\n  }\n  ensureActiveConnection() {\n    if (!this.connection.isActive()) {\n      return this.connection.open();\n    }\n  }\n}\n\nfunction createWebSocketURL(url) {\n  if (typeof url === \"function\") {\n    url = url();\n  }\n  if (url && !/^wss?:/i.test(url)) {\n    const a = document.createElement(\"a\");\n    a.href = url;\n    a.href = a.href;\n    a.protocol = a.protocol.replace(\"http\", \"ws\");\n    return a.href;\n  } else {\n    return url;\n  }\n}\n\nfunction createConsumer(url = getConfig(\"url\") || INTERNAL.default_mount_path) {\n  return new Consumer(url);\n}\n\nfunction getConfig(name) {\n  const element = document.head.querySelector(`meta[name='action-cable-${name}']`);\n  if (element) {\n    return element.getAttribute(\"content\");\n  }\n}\n\nexport { Connection, ConnectionMonitor, Consumer, INTERNAL, Subscription, SubscriptionGuarantor, Subscriptions, adapters, createConsumer, createWebSocketURL, getConfig, logger };\n"],"names":["adapters","logger","self","console","WebSocket","log","messages","this","enabled","push","Date","now","getTime","secondsSince","time","ConnectionMonitor","constructor","connection","visibilityDidChange","bind","reconnectAttempts","start","isRunning","startedAt","stoppedAt","startPolling","addEventListener","staleThreshold","stop","stopPolling","removeEventListener","recordPing","pingedAt","recordConnect","disconnectedAt","recordDisconnect","poll","clearTimeout","pollTimeout","setTimeout","reconnectIfStale","getPollInterval","reconnectionBackoffRate","Math","pow","min","random","connectionIsStale","refreshedAt","disconnectedRecently","reopen","document","visibilityState","isOpen","INTERNAL","message_types","welcome","disconnect","ping","confirmation","rejection","disconnect_reasons","unauthorized","invalid_request","server_restart","default_mount_path","protocols","supportedProtocols","slice","length","indexOf","Connection","consumer","open","subscriptions","monitor","disconnected","send","data","webSocket","JSON","stringify","isActive","getState","uninstallEventHandlers","url","installEventHandlers","close","allowReconnect","error","reopenDelay","getProtocol","protocol","isState","isProtocolSupported","call","states","state","readyState","toLowerCase","eventName","events","handler","prototype","message","event","identifier","reason","reconnect","type","parse","reload","confirmSubscription","notify","reject","notifyAll","willAttemptReconnect","Subscription","params","mixin","object","properties","key","value","extend","perform","action","command","unsubscribe","remove","SubscriptionGuarantor","pendingSubscriptions","guarantee","subscription","startGuaranteeing","forget","filter","s","stopGuaranteeing","retrySubscribing","retryTimeout","subscribe","map","Subscriptions","guarantor","create","channelName","channel","add","ensureActiveConnection","findAll","sendCommand","callbackName","args","undefined","Consumer","_url","createWebSocketURL","connect","test","a","createElement","href","replace","createConsumer","getConfig","name","element","head","querySelector","getAttribute"],"sourceRoot":""}