{
  "version": 3,
  "sources": ["../../assets/js/phoenix/index.js", "../../assets/js/phoenix/utils.js", "../../assets/js/phoenix/constants.js", "../../assets/js/phoenix/push.js", "../../assets/js/phoenix/timer.js", "../../assets/js/phoenix/channel.js", "../../assets/js/phoenix/ajax.js", "../../assets/js/phoenix/longpoll.js", "../../assets/js/phoenix/presence.js", "../../assets/js/phoenix/serializer.js", "../../assets/js/phoenix/socket.js"],
  "sourcesContent": ["/**\n * Phoenix Channels JavaScript client\n *\n * ## Socket Connection\n *\n * A single connection is established to the server and\n * channels are multiplexed over the connection.\n * Connect to the server using the `Socket` class:\n *\n * ```javascript\n * let socket = new Socket(\"/socket\", {params: {userToken: \"123\"}})\n * socket.connect()\n * ```\n *\n * The `Socket` constructor takes the mount point of the socket,\n * the authentication params, as well as options that can be found in\n * the Socket docs, such as configuring the `LongPoll` transport, and\n * heartbeat.\n *\n * ## Channels\n *\n * Channels are isolated, concurrent processes on the server that\n * subscribe to topics and broker events between the client and server.\n * To join a channel, you must provide the topic, and channel params for\n * authorization. Here's an example chat room example where `\"new_msg\"`\n * events are listened for, messages are pushed to the server, and\n * the channel is joined with ok/error/timeout matches:\n *\n * ```javascript\n * let channel = socket.channel(\"room:123\", {token: roomToken})\n * channel.on(\"new_msg\", msg => console.log(\"Got message\", msg) )\n * $input.onEnter( e => {\n *   channel.push(\"new_msg\", {body: e.target.val}, 10000)\n *     .receive(\"ok\", (msg) => console.log(\"created message\", msg) )\n *     .receive(\"error\", (reasons) => console.log(\"create failed\", reasons) )\n *     .receive(\"timeout\", () => console.log(\"Networking issue...\") )\n * })\n *\n * channel.join()\n *   .receive(\"ok\", ({messages}) => console.log(\"catching up\", messages) )\n *   .receive(\"error\", ({reason}) => console.log(\"failed join\", reason) )\n *   .receive(\"timeout\", () => console.log(\"Networking issue. Still waiting...\"))\n *```\n *\n * ## Joining\n *\n * Creating a channel with `socket.channel(topic, params)`, binds the params to\n * `channel.params`, which are sent up on `channel.join()`.\n * Subsequent rejoins will send up the modified params for\n * updating authorization params, or passing up last_message_id information.\n * Successful joins receive an \"ok\" status, while unsuccessful joins\n * receive \"error\".\n *\n * With the default serializers and WebSocket transport, JSON text frames are\n * used for pushing a JSON object literal. If an `ArrayBuffer` instance is provided,\n * binary encoding will be used and the message will be sent with the binary\n * opcode.\n *\n * *Note*: binary messages are only supported on the WebSocket transport.\n *\n * ## Duplicate Join Subscriptions\n *\n * While the client may join any number of topics on any number of channels,\n * the client may only hold a single subscription for each unique topic at any\n * given time. When attempting to create a duplicate subscription,\n * the server will close the existing channel, log a warning, and\n * spawn a new channel for the topic. The client will have their\n * `channel.onClose` callbacks fired for the existing channel, and the new\n * channel join will have its receive hooks processed as normal.\n *\n * ## Pushing Messages\n *\n * From the previous example, we can see that pushing messages to the server\n * can be done with `channel.push(eventName, payload)` and we can optionally\n * receive responses from the push. Additionally, we can use\n * `receive(\"timeout\", callback)` to abort waiting for our other `receive` hooks\n *  and take action after some period of waiting. The default timeout is 10000ms.\n *\n *\n * ## Socket Hooks\n *\n * Lifecycle events of the multiplexed connection can be hooked into via\n * `socket.onError()` and `socket.onClose()` events, ie:\n *\n * ```javascript\n * socket.onError( () => console.log(\"there was an error with the connection!\") )\n * socket.onClose( () => console.log(\"the connection dropped\") )\n * ```\n *\n *\n * ## Channel Hooks\n *\n * For each joined channel, you can bind to `onError` and `onClose` events\n * to monitor the channel lifecycle, ie:\n *\n * ```javascript\n * channel.onError( () => console.log(\"there was an error!\") )\n * channel.onClose( () => console.log(\"the channel has gone away gracefully\") )\n * ```\n *\n * ### onError hooks\n *\n * `onError` hooks are invoked if the socket connection drops, or the channel\n * crashes on the server. In either case, a channel rejoin is attempted\n * automatically in an exponential backoff manner.\n *\n * ### onClose hooks\n *\n * `onClose` hooks are invoked only in two cases. 1) the channel explicitly\n * closed on the server, or 2). The client explicitly closed, by calling\n * `channel.leave()`\n *\n *\n * ## Presence\n *\n * The `Presence` object provides features for syncing presence information\n * from the server with the client and handling presences joining and leaving.\n *\n * ### Syncing state from the server\n *\n * To sync presence state from the server, first instantiate an object and\n * pass your channel in to track lifecycle events:\n *\n * ```javascript\n * let channel = socket.channel(\"some:topic\")\n * let presence = new Presence(channel)\n * ```\n *\n * Next, use the `presence.onSync` callback to react to state changes\n * from the server. For example, to render the list of users every time\n * the list changes, you could write:\n *\n * ```javascript\n * presence.onSync(() => {\n *   myRenderUsersFunction(presence.list())\n * })\n * ```\n *\n * ### Listing Presences\n *\n * `presence.list` is used to return a list of presence information\n * based on the local state of metadata. By default, all presence\n * metadata is returned, but a `listBy` function can be supplied to\n * allow the client to select which metadata to use for a given presence.\n * For example, you may have a user online from different devices with\n * a metadata status of \"online\", but they have set themselves to \"away\"\n * on another device. In this case, the app may choose to use the \"away\"\n * status for what appears on the UI. The example below defines a `listBy`\n * function which prioritizes the first metadata which was registered for\n * each user. This could be the first tab they opened, or the first device\n * they came online from:\n *\n * ```javascript\n * let listBy = (id, {metas: [first, ...rest]}) => {\n *   first.count = rest.length + 1 // count of this user's presences\n *   first.id = id\n *   return first\n * }\n * let onlineUsers = presence.list(listBy)\n * ```\n *\n * ### Handling individual presence join and leave events\n *\n * The `presence.onJoin` and `presence.onLeave` callbacks can be used to\n * react to individual presences joining and leaving the app. For example:\n *\n * ```javascript\n * let presence = new Presence(channel)\n *\n * // detect if user has joined for the 1st time or from another tab/device\n * presence.onJoin((id, current, newPres) => {\n *   if(!current){\n *     console.log(\"user has entered for the first time\", newPres)\n *   } else {\n *     console.log(\"user additional presence\", newPres)\n *   }\n * })\n *\n * // detect if user has left from all tabs/devices, or is still present\n * presence.onLeave((id, current, leftPres) => {\n *   if(current.metas.length === 0){\n *     console.log(\"user has left from all devices\", leftPres)\n *   } else {\n *     console.log(\"user left from a device\", leftPres)\n *   }\n * })\n * // receive presence data from server\n * presence.onSync(() => {\n *   displayUsers(presence.list())\n * })\n * ```\n * @module phoenix\n */\n\nimport Channel from \"./channel\"\nimport LongPoll from \"./longpoll\"\nimport Presence from \"./presence\"\nimport Serializer from \"./serializer\"\nimport Socket from \"./socket\"\n\nexport {\n  Channel,\n  LongPoll,\n  Presence,\n  Serializer,\n  Socket\n}\n", "// wraps value in closure or returns closure\nexport let closure = (value) => {\n  if(typeof value === \"function\"){\n    return value\n  } else {\n    let closure = function (){ return value }\n    return closure\n  }\n}\n", "export const globalSelf = typeof self !== \"undefined\" ? self : null\nexport const phxWindow = typeof window !== \"undefined\" ? window : null\nexport const global = globalSelf || phxWindow || global\nexport const DEFAULT_VSN = \"2.0.0\"\nexport const SOCKET_STATES = {connecting: 0, open: 1, closing: 2, closed: 3}\nexport const DEFAULT_TIMEOUT = 10000\nexport const WS_CLOSE_NORMAL = 1000\nexport const CHANNEL_STATES = {\n  closed: \"closed\",\n  errored: \"errored\",\n  joined: \"joined\",\n  joining: \"joining\",\n  leaving: \"leaving\",\n}\nexport const CHANNEL_EVENTS = {\n  close: \"phx_close\",\n  error: \"phx_error\",\n  join: \"phx_join\",\n  reply: \"phx_reply\",\n  leave: \"phx_leave\"\n}\n\nexport const TRANSPORTS = {\n  longpoll: \"longpoll\",\n  websocket: \"websocket\"\n}\nexport const XHR_STATES = {\n  complete: 4\n}\n", "/**\n * Initializes the Push\n * @param {Channel} channel - The Channel\n * @param {string} event - The event, for example `\"phx_join\"`\n * @param {Object} payload - The payload, for example `{user_id: 123}`\n * @param {number} timeout - The push timeout in milliseconds\n */\nexport default class Push {\n  constructor(channel, event, payload, timeout){\n    this.channel = channel\n    this.event = event\n    this.payload = payload || function (){ return {} }\n    this.receivedResp = null\n    this.timeout = timeout\n    this.timeoutTimer = null\n    this.recHooks = []\n    this.sent = false\n  }\n\n  /**\n   *\n   * @param {number} timeout\n   */\n  resend(timeout){\n    this.timeout = timeout\n    this.reset()\n    this.send()\n  }\n\n  /**\n   *\n   */\n  send(){\n    if(this.hasReceived(\"timeout\")){ return }\n    this.startTimeout()\n    this.sent = true\n    this.channel.socket.push({\n      topic: this.channel.topic,\n      event: this.event,\n      payload: this.payload(),\n      ref: this.ref,\n      join_ref: this.channel.joinRef()\n    })\n  }\n\n  /**\n   *\n   * @param {*} status\n   * @param {*} callback\n   */\n  receive(status, callback){\n    if(this.hasReceived(status)){\n      callback(this.receivedResp.response)\n    }\n\n    this.recHooks.push({status, callback})\n    return this\n  }\n\n  /**\n   * @private\n   */\n  reset(){\n    this.cancelRefEvent()\n    this.ref = null\n    this.refEvent = null\n    this.receivedResp = null\n    this.sent = false\n  }\n\n  /**\n   * @private\n   */\n  matchReceive({status, response, _ref}){\n    this.recHooks.filter(h => h.status === status)\n      .forEach(h => h.callback(response))\n  }\n\n  /**\n   * @private\n   */\n  cancelRefEvent(){\n    if(!this.refEvent){ return }\n    this.channel.off(this.refEvent)\n  }\n\n  /**\n   * @private\n   */\n  cancelTimeout(){\n    clearTimeout(this.timeoutTimer)\n    this.timeoutTimer = null\n  }\n\n  /**\n   * @private\n   */\n  startTimeout(){\n    if(this.timeoutTimer){ this.cancelTimeout() }\n    this.ref = this.channel.socket.makeRef()\n    this.refEvent = this.channel.replyEventName(this.ref)\n\n    this.channel.on(this.refEvent, payload => {\n      this.cancelRefEvent()\n      this.cancelTimeout()\n      this.receivedResp = payload\n      this.matchReceive(payload)\n    })\n\n    this.timeoutTimer = setTimeout(() => {\n      this.trigger(\"timeout\", {})\n    }, this.timeout)\n  }\n\n  /**\n   * @private\n   */\n  hasReceived(status){\n    return this.receivedResp && this.receivedResp.status === status\n  }\n\n  /**\n   * @private\n   */\n  trigger(status, response){\n    this.channel.trigger(this.refEvent, {status, response})\n  }\n}\n", "/**\n *\n * Creates a timer that accepts a `timerCalc` function to perform\n * calculated timeout retries, such as exponential backoff.\n *\n * @example\n * let reconnectTimer = new Timer(() => this.connect(), function(tries){\n *   return [1000, 5000, 10000][tries - 1] || 10000\n * })\n * reconnectTimer.scheduleTimeout() // fires after 1000\n * reconnectTimer.scheduleTimeout() // fires after 5000\n * reconnectTimer.reset()\n * reconnectTimer.scheduleTimeout() // fires after 1000\n *\n * @param {Function} callback\n * @param {Function} timerCalc\n */\nexport default class Timer {\n  constructor(callback, timerCalc){\n    this.callback = callback\n    this.timerCalc = timerCalc\n    this.timer = null\n    this.tries = 0\n  }\n\n  reset(){\n    this.tries = 0\n    clearTimeout(this.timer)\n  }\n\n  /**\n   * Cancels any previous scheduleTimeout and schedules callback\n   */\n  scheduleTimeout(){\n    clearTimeout(this.timer)\n\n    this.timer = setTimeout(() => {\n      this.tries = this.tries + 1\n      this.callback()\n    }, this.timerCalc(this.tries + 1))\n  }\n}\n", "import {closure} from \"./utils\"\nimport {\n  CHANNEL_EVENTS,\n  CHANNEL_STATES,\n} from \"./constants\"\n\nimport Push from \"./push\"\nimport Timer from \"./timer\"\n\n/**\n *\n * @param {string} topic\n * @param {(Object|function)} params\n * @param {Socket} socket\n */\nexport default class Channel {\n  constructor(topic, params, socket){\n    this.state = CHANNEL_STATES.closed\n    this.topic = topic\n    this.params = closure(params || {})\n    this.socket = socket\n    this.bindings = []\n    this.bindingRef = 0\n    this.timeout = this.socket.timeout\n    this.joinedOnce = false\n    this.joinPush = new Push(this, CHANNEL_EVENTS.join, this.params, this.timeout)\n    this.pushBuffer = []\n    this.stateChangeRefs = []\n\n    this.rejoinTimer = new Timer(() => {\n      if(this.socket.isConnected()){ this.rejoin() }\n    }, this.socket.rejoinAfterMs)\n    this.stateChangeRefs.push(this.socket.onError(() => this.rejoinTimer.reset()))\n    this.stateChangeRefs.push(this.socket.onOpen(() => {\n      this.rejoinTimer.reset()\n      if(this.isErrored()){ this.rejoin() }\n    })\n    )\n    this.joinPush.receive(\"ok\", () => {\n      this.state = CHANNEL_STATES.joined\n      this.rejoinTimer.reset()\n      this.pushBuffer.forEach(pushEvent => pushEvent.send())\n      this.pushBuffer = []\n    })\n    this.joinPush.receive(\"error\", () => {\n      this.state = CHANNEL_STATES.errored\n      if(this.socket.isConnected()){ this.rejoinTimer.scheduleTimeout() }\n    })\n    this.onClose(() => {\n      this.rejoinTimer.reset()\n      if(this.socket.hasLogger()) this.socket.log(\"channel\", `close ${this.topic} ${this.joinRef()}`)\n      this.state = CHANNEL_STATES.closed\n      this.socket.remove(this)\n    })\n    this.onError(reason => {\n      if(this.socket.hasLogger()) this.socket.log(\"channel\", `error ${this.topic}`, reason)\n      if(this.isJoining()){ this.joinPush.reset() }\n      this.state = CHANNEL_STATES.errored\n      if(this.socket.isConnected()){ this.rejoinTimer.scheduleTimeout() }\n    })\n    this.joinPush.receive(\"timeout\", () => {\n      if(this.socket.hasLogger()) this.socket.log(\"channel\", `timeout ${this.topic} (${this.joinRef()})`, this.joinPush.timeout)\n      let leavePush = new Push(this, CHANNEL_EVENTS.leave, closure({}), this.timeout)\n      leavePush.send()\n      this.state = CHANNEL_STATES.errored\n      this.joinPush.reset()\n      if(this.socket.isConnected()){ this.rejoinTimer.scheduleTimeout() }\n    })\n    this.on(CHANNEL_EVENTS.reply, (payload, ref) => {\n      this.trigger(this.replyEventName(ref), payload)\n    })\n  }\n\n  /**\n   * Join the channel\n   * @param {integer} timeout\n   * @returns {Push}\n   */\n  join(timeout = this.timeout){\n    if(this.joinedOnce){\n      throw new Error(\"tried to join multiple times. 'join' can only be called a single time per channel instance\")\n    } else {\n      this.timeout = timeout\n      this.joinedOnce = true\n      this.rejoin()\n      return this.joinPush\n    }\n  }\n\n  /**\n   * Hook into channel close\n   * @param {Function} callback\n   */\n  onClose(callback){\n    this.on(CHANNEL_EVENTS.close, callback)\n  }\n\n  /**\n   * Hook into channel errors\n   * @param {Function} callback\n   */\n  onError(callback){\n    return this.on(CHANNEL_EVENTS.error, reason => callback(reason))\n  }\n\n  /**\n   * Subscribes on channel events\n   *\n   * Subscription returns a ref counter, which can be used later to\n   * unsubscribe the exact event listener\n   *\n   * @example\n   * const ref1 = channel.on(\"event\", do_stuff)\n   * const ref2 = channel.on(\"event\", do_other_stuff)\n   * channel.off(\"event\", ref1)\n   * // Since unsubscription, do_stuff won't fire,\n   * // while do_other_stuff will keep firing on the \"event\"\n   *\n   * @param {string} event\n   * @param {Function} callback\n   * @returns {integer} ref\n   */\n  on(event, callback){\n    let ref = this.bindingRef++\n    this.bindings.push({event, ref, callback})\n    return ref\n  }\n\n  /**\n   * Unsubscribes off of channel events\n   *\n   * Use the ref returned from a channel.on() to unsubscribe one\n   * handler, or pass nothing for the ref to unsubscribe all\n   * handlers for the given event.\n   *\n   * @example\n   * // Unsubscribe the do_stuff handler\n   * const ref1 = channel.on(\"event\", do_stuff)\n   * channel.off(\"event\", ref1)\n   *\n   * // Unsubscribe all handlers from event\n   * channel.off(\"event\")\n   *\n   * @param {string} event\n   * @param {integer} ref\n   */\n  off(event, ref){\n    this.bindings = this.bindings.filter((bind) => {\n      return !(bind.event === event && (typeof ref === \"undefined\" || ref === bind.ref))\n    })\n  }\n\n  /**\n   * @private\n   */\n  canPush(){ return this.socket.isConnected() && this.isJoined() }\n\n  /**\n   * Sends a message `event` to phoenix with the payload `payload`.\n   * Phoenix receives this in the `handle_in(event, payload, socket)`\n   * function. if phoenix replies or it times out (default 10000ms),\n   * then optionally the reply can be received.\n   *\n   * @example\n   * channel.push(\"event\")\n   *   .receive(\"ok\", payload => console.log(\"phoenix replied:\", payload))\n   *   .receive(\"error\", err => console.log(\"phoenix errored\", err))\n   *   .receive(\"timeout\", () => console.log(\"timed out pushing\"))\n   * @param {string} event\n   * @param {Object} payload\n   * @param {number} [timeout]\n   * @returns {Push}\n   */\n  push(event, payload, timeout = this.timeout){\n    payload = payload || {}\n    if(!this.joinedOnce){\n      throw new Error(`tried to push '${event}' to '${this.topic}' before joining. Use channel.join() before pushing events`)\n    }\n    let pushEvent = new Push(this, event, function (){ return payload }, timeout)\n    if(this.canPush()){\n      pushEvent.send()\n    } else {\n      pushEvent.startTimeout()\n      this.pushBuffer.push(pushEvent)\n    }\n\n    return pushEvent\n  }\n\n  /** Leaves the channel\n   *\n   * Unsubscribes from server events, and\n   * instructs channel to terminate on server\n   *\n   * Triggers onClose() hooks\n   *\n   * To receive leave acknowledgements, use the `receive`\n   * hook to bind to the server ack, ie:\n   *\n   * @example\n   * channel.leave().receive(\"ok\", () => alert(\"left!\") )\n   *\n   * @param {integer} timeout\n   * @returns {Push}\n   */\n  leave(timeout = this.timeout){\n    this.rejoinTimer.reset()\n    this.joinPush.cancelTimeout()\n\n    this.state = CHANNEL_STATES.leaving\n    let onClose = () => {\n      if(this.socket.hasLogger()) this.socket.log(\"channel\", `leave ${this.topic}`)\n      this.trigger(CHANNEL_EVENTS.close, \"leave\")\n    }\n    let leavePush = new Push(this, CHANNEL_EVENTS.leave, closure({}), timeout)\n    leavePush.receive(\"ok\", () => onClose())\n      .receive(\"timeout\", () => onClose())\n    leavePush.send()\n    if(!this.canPush()){ leavePush.trigger(\"ok\", {}) }\n\n    return leavePush\n  }\n\n  /**\n   * Overridable message hook\n   *\n   * Receives all events for specialized message handling\n   * before dispatching to the channel callbacks.\n   *\n   * Must return the payload, modified or unmodified\n   * @param {string} event\n   * @param {Object} payload\n   * @param {integer} ref\n   * @returns {Object}\n   */\n  onMessage(_event, payload, _ref){ return payload }\n\n  /**\n   * @private\n   */\n  isMember(topic, event, payload, joinRef){\n    if(this.topic !== topic){ return false }\n\n    if(joinRef && joinRef !== this.joinRef()){\n      if(this.socket.hasLogger()) this.socket.log(\"channel\", \"dropping outdated message\", {topic, event, payload, joinRef})\n      return false\n    } else {\n      return true\n    }\n  }\n\n  /**\n   * @private\n   */\n  joinRef(){ return this.joinPush.ref }\n\n  /**\n   * @private\n   */\n  rejoin(timeout = this.timeout){\n    if(this.isLeaving()){ return }\n    this.socket.leaveOpenTopic(this.topic)\n    this.state = CHANNEL_STATES.joining\n    this.joinPush.resend(timeout)\n  }\n\n  /**\n   * @private\n   */\n  trigger(event, payload, ref, joinRef){\n    let handledPayload = this.onMessage(event, payload, ref, joinRef)\n    if(payload && !handledPayload){ throw new Error(\"channel onMessage callbacks must return the payload, modified or unmodified\") }\n\n    let eventBindings = this.bindings.filter(bind => bind.event === event)\n\n    for(let i = 0; i < eventBindings.length; i++){\n      let bind = eventBindings[i]\n      bind.callback(handledPayload, ref, joinRef || this.joinRef())\n    }\n  }\n\n  /**\n   * @private\n   */\n  replyEventName(ref){ return `chan_reply_${ref}` }\n\n  /**\n   * @private\n   */\n  isClosed(){ return this.state === CHANNEL_STATES.closed }\n\n  /**\n   * @private\n   */\n  isErrored(){ return this.state === CHANNEL_STATES.errored }\n\n  /**\n   * @private\n   */\n  isJoined(){ return this.state === CHANNEL_STATES.joined }\n\n  /**\n   * @private\n   */\n  isJoining(){ return this.state === CHANNEL_STATES.joining }\n\n  /**\n   * @private\n   */\n  isLeaving(){ return this.state === CHANNEL_STATES.leaving }\n}\n", "import {\n  global,\n  XHR_STATES\n} from \"./constants\"\n\nexport default class Ajax {\n\n  static request(method, endPoint, accept, body, timeout, ontimeout, callback){\n    if(global.XDomainRequest){\n      let req = new global.XDomainRequest() // IE8, IE9\n      return this.xdomainRequest(req, method, endPoint, body, timeout, ontimeout, callback)\n    } else {\n      let req = new global.XMLHttpRequest() // IE7+, Firefox, Chrome, Opera, Safari\n      return this.xhrRequest(req, method, endPoint, accept, body, timeout, ontimeout, callback)\n    }\n  }\n\n  static xdomainRequest(req, method, endPoint, body, timeout, ontimeout, callback){\n    req.timeout = timeout\n    req.open(method, endPoint)\n    req.onload = () => {\n      let response = this.parseJSON(req.responseText)\n      callback && callback(response)\n    }\n    if(ontimeout){ req.ontimeout = ontimeout }\n\n    // Work around bug in IE9 that requires an attached onprogress handler\n    req.onprogress = () => { }\n\n    req.send(body)\n    return req\n  }\n\n  static xhrRequest(req, method, endPoint, accept, body, timeout, ontimeout, callback){\n    req.open(method, endPoint, true)\n    req.timeout = timeout\n    req.setRequestHeader(\"Content-Type\", accept)\n    req.onerror = () => callback && callback(null)\n    req.onreadystatechange = () => {\n      if(req.readyState === XHR_STATES.complete && callback){\n        let response = this.parseJSON(req.responseText)\n        callback(response)\n      }\n    }\n    if(ontimeout){ req.ontimeout = ontimeout }\n\n    req.send(body)\n    return req\n  }\n\n  static parseJSON(resp){\n    if(!resp || resp === \"\"){ return null }\n\n    try {\n      return JSON.parse(resp)\n    } catch (e){\n      console && console.log(\"failed to parse JSON response\", resp)\n      return null\n    }\n  }\n\n  static serialize(obj, parentKey){\n    let queryStr = []\n    for(var key in obj){\n      if(!Object.prototype.hasOwnProperty.call(obj, key)){ continue }\n      let paramKey = parentKey ? `${parentKey}[${key}]` : key\n      let paramVal = obj[key]\n      if(typeof paramVal === \"object\"){\n        queryStr.push(this.serialize(paramVal, paramKey))\n      } else {\n        queryStr.push(encodeURIComponent(paramKey) + \"=\" + encodeURIComponent(paramVal))\n      }\n    }\n    return queryStr.join(\"&\")\n  }\n\n  static appendParams(url, params){\n    if(Object.keys(params).length === 0){ return url }\n\n    let prefix = url.match(/\\?/) ? \"&\" : \"?\"\n    return `${url}${prefix}${this.serialize(params)}`\n  }\n}\n", "import {\n  SOCKET_STATES,\n  TRANSPORTS\n} from \"./constants\"\n\nimport Ajax from \"./ajax\"\n\nexport default class LongPoll {\n\n  constructor(endPoint){\n    this.endPoint = null\n    this.token = null\n    this.skipHeartbeat = true\n    this.reqs = new Set()\n    this.onopen = function (){ } // noop\n    this.onerror = function (){ } // noop\n    this.onmessage = function (){ } // noop\n    this.onclose = function (){ } // noop\n    this.pollEndpoint = this.normalizeEndpoint(endPoint)\n    this.readyState = SOCKET_STATES.connecting\n    this.poll()\n  }\n\n  normalizeEndpoint(endPoint){\n    return (endPoint\n      .replace(\"ws://\", \"http://\")\n      .replace(\"wss://\", \"https://\")\n      .replace(new RegExp(\"(.*)\\/\" + TRANSPORTS.websocket), \"$1/\" + TRANSPORTS.longpoll))\n  }\n\n  endpointURL(){\n    return Ajax.appendParams(this.pollEndpoint, {token: this.token})\n  }\n\n  closeAndRetry(code, reason, wasClean){\n    this.close(code, reason, wasClean)\n    this.readyState = SOCKET_STATES.connecting\n  }\n\n  ontimeout(){\n    this.onerror(\"timeout\")\n    this.closeAndRetry(1005, \"timeout\", false)\n  }\n\n  isActive(){ return this.readyState === SOCKET_STATES.open || this.readyState === SOCKET_STATES.connecting }\n\n  poll(){\n    this.ajax(\"GET\", null, () => this.ontimeout(), resp => {\n      if(resp){\n        var {status, token, messages} = resp\n        this.token = token\n      } else {\n        status = 0\n      }\n\n      switch(status){\n        case 200:\n          messages.forEach(msg => {\n            // Tasks are what things like event handlers, setTimeout callbacks,\n            // promise resolves and more are run within.\n            // In modern browsers, there are two different kinds of tasks,\n            // microtasks and macrotasks.\n            // Microtasks are mainly used for Promises, while macrotasks are\n            // used for everything else.\n            // Microtasks always have priority over macrotasks. If the JS engine\n            // is looking for a task to run, it will always try to empty the\n            // microtask queue before attempting to run anything from the\n            // macrotask queue.\n            //\n            // For the WebSocket transport, messages always arrive in their own\n            // event. This means that if any promises are resolved from within,\n            // their callbacks will always finish execution by the time the\n            // next message event handler is run.\n            //\n            // In order to emulate this behaviour, we need to make sure each\n            // onmessage handler is run within it's own macrotask.\n            setTimeout(() => this.onmessage({data: msg}), 0)\n          })\n          this.poll()\n          break\n        case 204:\n          this.poll()\n          break\n        case 410:\n          this.readyState = SOCKET_STATES.open\n          this.onopen({})\n          this.poll()\n          break\n        case 403:\n          this.onerror(403)\n          this.close(1008, \"forbidden\", false)\n          break\n        case 0:\n        case 500:\n          this.onerror(500)\n          this.closeAndRetry(1011, \"internal server error\", 500)\n          break\n        default: throw new Error(`unhandled poll status ${status}`)\n      }\n    })\n  }\n\n  send(body){\n    this.ajax(\"POST\", body, () => this.onerror(\"timeout\"), resp => {\n      if(!resp || resp.status !== 200){\n        this.onerror(resp && resp.status)\n        this.closeAndRetry(1011, \"internal server error\", false)\n      }\n    })\n  }\n\n  close(code, reason, wasClean){\n    for(let req of this.reqs){ req.abort() }\n    this.readyState = SOCKET_STATES.closed\n    let opts = Object.assign({code: 1000, reason: undefined, wasClean: true}, {code, reason, wasClean})\n    if(typeof(CloseEvent) !== \"undefined\"){\n      this.onclose(new CloseEvent(\"close\", opts))\n    } else {\n      this.onclose(opts)\n    }\n  }\n\n  ajax(method, body, onCallerTimeout, callback){\n    let req\n    let ontimeout = () => {\n      this.reqs.delete(req)\n      onCallerTimeout()\n    }\n    req = Ajax.request(method, this.endpointURL(), \"application/json\", body, this.timeout, ontimeout, resp => {\n      this.reqs.delete(req)\n      if(this.isActive()){ callback(resp) }\n    })\n    this.reqs.add(req)\n  }\n}\n", "/**\n * Initializes the Presence\n * @param {Channel} channel - The Channel\n * @param {Object} opts - The options,\n *        for example `{events: {state: \"state\", diff: \"diff\"}}`\n */\nexport default class Presence {\n\n  constructor(channel, opts = {}){\n    let events = opts.events || {state: \"presence_state\", diff: \"presence_diff\"}\n    this.state = {}\n    this.pendingDiffs = []\n    this.channel = channel\n    this.joinRef = null\n    this.caller = {\n      onJoin: function (){ },\n      onLeave: function (){ },\n      onSync: function (){ }\n    }\n\n    this.channel.on(events.state, newState => {\n      let {onJoin, onLeave, onSync} = this.caller\n\n      this.joinRef = this.channel.joinRef()\n      this.state = Presence.syncState(this.state, newState, onJoin, onLeave)\n\n      this.pendingDiffs.forEach(diff => {\n        this.state = Presence.syncDiff(this.state, diff, onJoin, onLeave)\n      })\n      this.pendingDiffs = []\n      onSync()\n    })\n\n    this.channel.on(events.diff, diff => {\n      let {onJoin, onLeave, onSync} = this.caller\n\n      if(this.inPendingSyncState()){\n        this.pendingDiffs.push(diff)\n      } else {\n        this.state = Presence.syncDiff(this.state, diff, onJoin, onLeave)\n        onSync()\n      }\n    })\n  }\n\n  onJoin(callback){ this.caller.onJoin = callback }\n\n  onLeave(callback){ this.caller.onLeave = callback }\n\n  onSync(callback){ this.caller.onSync = callback }\n\n  list(by){ return Presence.list(this.state, by) }\n\n  inPendingSyncState(){\n    return !this.joinRef || (this.joinRef !== this.channel.joinRef())\n  }\n\n  // lower-level public static API\n\n  /**\n   * Used to sync the list of presences on the server\n   * with the client's state. An optional `onJoin` and `onLeave` callback can\n   * be provided to react to changes in the client's local presences across\n   * disconnects and reconnects with the server.\n   *\n   * @returns {Presence}\n   */\n  static syncState(currentState, newState, onJoin, onLeave){\n    let state = this.clone(currentState)\n    let joins = {}\n    let leaves = {}\n\n    this.map(state, (key, presence) => {\n      if(!newState[key]){\n        leaves[key] = presence\n      }\n    })\n    this.map(newState, (key, newPresence) => {\n      let currentPresence = state[key]\n      if(currentPresence){\n        let newRefs = newPresence.metas.map(m => m.phx_ref)\n        let curRefs = currentPresence.metas.map(m => m.phx_ref)\n        let joinedMetas = newPresence.metas.filter(m => curRefs.indexOf(m.phx_ref) < 0)\n        let leftMetas = currentPresence.metas.filter(m => newRefs.indexOf(m.phx_ref) < 0)\n        if(joinedMetas.length > 0){\n          joins[key] = newPresence\n          joins[key].metas = joinedMetas\n        }\n        if(leftMetas.length > 0){\n          leaves[key] = this.clone(currentPresence)\n          leaves[key].metas = leftMetas\n        }\n      } else {\n        joins[key] = newPresence\n      }\n    })\n    return this.syncDiff(state, {joins: joins, leaves: leaves}, onJoin, onLeave)\n  }\n\n  /**\n   *\n   * Used to sync a diff of presence join and leave\n   * events from the server, as they happen. Like `syncState`, `syncDiff`\n   * accepts optional `onJoin` and `onLeave` callbacks to react to a user\n   * joining or leaving from a device.\n   *\n   * @returns {Presence}\n   */\n  static syncDiff(state, diff, onJoin, onLeave){\n    let {joins, leaves} = this.clone(diff)\n    if(!onJoin){ onJoin = function (){ } }\n    if(!onLeave){ onLeave = function (){ } }\n\n    this.map(joins, (key, newPresence) => {\n      let currentPresence = state[key]\n      state[key] = this.clone(newPresence)\n      if(currentPresence){\n        let joinedRefs = state[key].metas.map(m => m.phx_ref)\n        let curMetas = currentPresence.metas.filter(m => joinedRefs.indexOf(m.phx_ref) < 0)\n        state[key].metas.unshift(...curMetas)\n      }\n      onJoin(key, currentPresence, newPresence)\n    })\n    this.map(leaves, (key, leftPresence) => {\n      let currentPresence = state[key]\n      if(!currentPresence){ return }\n      let refsToRemove = leftPresence.metas.map(m => m.phx_ref)\n      currentPresence.metas = currentPresence.metas.filter(p => {\n        return refsToRemove.indexOf(p.phx_ref) < 0\n      })\n      onLeave(key, currentPresence, leftPresence)\n      if(currentPresence.metas.length === 0){\n        delete state[key]\n      }\n    })\n    return state\n  }\n\n  /**\n   * Returns the array of presences, with selected metadata.\n   *\n   * @param {Object} presences\n   * @param {Function} chooser\n   *\n   * @returns {Presence}\n   */\n  static list(presences, chooser){\n    if(!chooser){ chooser = function (key, pres){ return pres } }\n\n    return this.map(presences, (key, presence) => {\n      return chooser(key, presence)\n    })\n  }\n\n  // private\n\n  static map(obj, func){\n    return Object.getOwnPropertyNames(obj).map(key => func(key, obj[key]))\n  }\n\n  static clone(obj){ return JSON.parse(JSON.stringify(obj)) }\n}\n", "/* The default serializer for encoding and decoding messages */\nimport {\n  CHANNEL_EVENTS\n} from \"./constants\"\n\nexport default {\n  HEADER_LENGTH: 1,\n  META_LENGTH: 4,\n  KINDS: {push: 0, reply: 1, broadcast: 2},\n\n  encode(msg, callback){\n    if(msg.payload.constructor === ArrayBuffer){\n      return callback(this.binaryEncode(msg))\n    } else {\n      let payload = [msg.join_ref, msg.ref, msg.topic, msg.event, msg.payload]\n      return callback(JSON.stringify(payload))\n    }\n  },\n\n  decode(rawPayload, callback){\n    if(rawPayload.constructor === ArrayBuffer){\n      return callback(this.binaryDecode(rawPayload))\n    } else {\n      let [join_ref, ref, topic, event, payload] = JSON.parse(rawPayload)\n      return callback({join_ref, ref, topic, event, payload})\n    }\n  },\n\n  // private\n\n  binaryEncode(message){\n    let {join_ref, ref, event, topic, payload} = message\n    let metaLength = this.META_LENGTH + join_ref.length + ref.length + topic.length + event.length\n    let header = new ArrayBuffer(this.HEADER_LENGTH + metaLength)\n    let view = new DataView(header)\n    let offset = 0\n\n    view.setUint8(offset++, this.KINDS.push) // kind\n    view.setUint8(offset++, join_ref.length)\n    view.setUint8(offset++, ref.length)\n    view.setUint8(offset++, topic.length)\n    view.setUint8(offset++, event.length)\n    Array.from(join_ref, char => view.setUint8(offset++, char.charCodeAt(0)))\n    Array.from(ref, char => view.setUint8(offset++, char.charCodeAt(0)))\n    Array.from(topic, char => view.setUint8(offset++, char.charCodeAt(0)))\n    Array.from(event, char => view.setUint8(offset++, char.charCodeAt(0)))\n\n    var combined = new Uint8Array(header.byteLength + payload.byteLength)\n    combined.set(new Uint8Array(header), 0)\n    combined.set(new Uint8Array(payload), header.byteLength)\n\n    return combined.buffer\n  },\n\n  binaryDecode(buffer){\n    let view = new DataView(buffer)\n    let kind = view.getUint8(0)\n    let decoder = new TextDecoder()\n    switch(kind){\n      case this.KINDS.push: return this.decodePush(buffer, view, decoder)\n      case this.KINDS.reply: return this.decodeReply(buffer, view, decoder)\n      case this.KINDS.broadcast: return this.decodeBroadcast(buffer, view, decoder)\n    }\n  },\n\n  decodePush(buffer, view, decoder){\n    let joinRefSize = view.getUint8(1)\n    let topicSize = view.getUint8(2)\n    let eventSize = view.getUint8(3)\n    let offset = this.HEADER_LENGTH + this.META_LENGTH - 1 // pushes have no ref\n    let joinRef = decoder.decode(buffer.slice(offset, offset + joinRefSize))\n    offset = offset + joinRefSize\n    let topic = decoder.decode(buffer.slice(offset, offset + topicSize))\n    offset = offset + topicSize\n    let event = decoder.decode(buffer.slice(offset, offset + eventSize))\n    offset = offset + eventSize\n    let data = buffer.slice(offset, buffer.byteLength)\n    return {join_ref: joinRef, ref: null, topic: topic, event: event, payload: data}\n  },\n\n  decodeReply(buffer, view, decoder){\n    let joinRefSize = view.getUint8(1)\n    let refSize = view.getUint8(2)\n    let topicSize = view.getUint8(3)\n    let eventSize = view.getUint8(4)\n    let offset = this.HEADER_LENGTH + this.META_LENGTH\n    let joinRef = decoder.decode(buffer.slice(offset, offset + joinRefSize))\n    offset = offset + joinRefSize\n    let ref = decoder.decode(buffer.slice(offset, offset + refSize))\n    offset = offset + refSize\n    let topic = decoder.decode(buffer.slice(offset, offset + topicSize))\n    offset = offset + topicSize\n    let event = decoder.decode(buffer.slice(offset, offset + eventSize))\n    offset = offset + eventSize\n    let data = buffer.slice(offset, buffer.byteLength)\n    let payload = {status: event, response: data}\n    return {join_ref: joinRef, ref: ref, topic: topic, event: CHANNEL_EVENTS.reply, payload: payload}\n  },\n\n  decodeBroadcast(buffer, view, decoder){\n    let topicSize = view.getUint8(1)\n    let eventSize = view.getUint8(2)\n    let offset = this.HEADER_LENGTH + 2\n    let topic = decoder.decode(buffer.slice(offset, offset + topicSize))\n    offset = offset + topicSize\n    let event = decoder.decode(buffer.slice(offset, offset + eventSize))\n    offset = offset + eventSize\n    let data = buffer.slice(offset, buffer.byteLength)\n\n    return {join_ref: null, ref: null, topic: topic, event: event, payload: data}\n  }\n}\n", "import {\n  global,\n  phxWindow,\n  CHANNEL_EVENTS,\n  DEFAULT_TIMEOUT,\n  DEFAULT_VSN,\n  SOCKET_STATES,\n  TRANSPORTS,\n  WS_CLOSE_NORMAL\n} from \"./constants\"\n\nimport {\n  closure\n} from \"./utils\"\n\nimport Ajax from \"./ajax\"\nimport Channel from \"./channel\"\nimport LongPoll from \"./longpoll\"\nimport Serializer from \"./serializer\"\nimport Timer from \"./timer\"\n\n/** Initializes the Socket *\n *\n * For IE8 support use an ES5-shim (https://github.com/es-shims/es5-shim)\n *\n * @param {string} endPoint - The string WebSocket endpoint, ie, `\"ws://example.com/socket\"`,\n *                                               `\"wss://example.com\"`\n *                                               `\"/socket\"` (inherited host & protocol)\n * @param {Object} [opts] - Optional configuration\n * @param {Function} [opts.transport] - The Websocket Transport, for example WebSocket or Phoenix.LongPoll.\n *\n * Defaults to WebSocket with automatic LongPoll fallback.\n * @param {Function} [opts.encode] - The function to encode outgoing messages.\n *\n * Defaults to JSON encoder.\n *\n * @param {Function} [opts.decode] - The function to decode incoming messages.\n *\n * Defaults to JSON:\n *\n * ```javascript\n * (payload, callback) => callback(JSON.parse(payload))\n * ```\n *\n * @param {number} [opts.timeout] - The default timeout in milliseconds to trigger push timeouts.\n *\n * Defaults `DEFAULT_TIMEOUT`\n * @param {number} [opts.heartbeatIntervalMs] - The millisec interval to send a heartbeat message\n * @param {number} [opts.reconnectAfterMs] - The optional function that returns the millisec\n * socket reconnect interval.\n *\n * Defaults to stepped backoff of:\n *\n * ```javascript\n * function(tries){\n *   return [10, 50, 100, 150, 200, 250, 500, 1000, 2000][tries - 1] || 5000\n * }\n * ````\n *\n * @param {number} [opts.rejoinAfterMs] - The optional function that returns the millisec\n * rejoin interval for individual channels.\n *\n * ```javascript\n * function(tries){\n *   return [1000, 2000, 5000][tries - 1] || 10000\n * }\n * ````\n *\n * @param {Function} [opts.logger] - The optional function for specialized logging, ie:\n *\n * ```javascript\n * function(kind, msg, data) {\n *   console.log(`${kind}: ${msg}`, data)\n * }\n * ```\n *\n * @param {number} [opts.longpollerTimeout] - The maximum timeout of a long poll AJAX request.\n *\n * Defaults to 20s (double the server long poll timer).\n *\n * @param {(Object|function)} [opts.params] - The optional params to pass when connecting\n * @param {string} [opts.binaryType] - The binary type to use for binary WebSocket frames.\n *\n * Defaults to \"arraybuffer\"\n *\n * @param {vsn} [opts.vsn] - The serializer's protocol version to send on connect.\n *\n * Defaults to DEFAULT_VSN.\n*/\nexport default class Socket {\n  constructor(endPoint, opts = {}){\n    this.stateChangeCallbacks = {open: [], close: [], error: [], message: []}\n    this.channels = []\n    this.sendBuffer = []\n    this.ref = 0\n    this.timeout = opts.timeout || DEFAULT_TIMEOUT\n    this.transport = opts.transport || global.WebSocket || LongPoll\n    this.establishedConnections = 0\n    this.defaultEncoder = Serializer.encode.bind(Serializer)\n    this.defaultDecoder = Serializer.decode.bind(Serializer)\n    this.closeWasClean = false\n    this.binaryType = opts.binaryType || \"arraybuffer\"\n    this.connectClock = 1\n    if(this.transport !== LongPoll){\n      this.encode = opts.encode || this.defaultEncoder\n      this.decode = opts.decode || this.defaultDecoder\n    } else {\n      this.encode = this.defaultEncoder\n      this.decode = this.defaultDecoder\n    }\n    let awaitingConnectionOnPageShow = null\n    if(phxWindow && phxWindow.addEventListener){\n      phxWindow.addEventListener(\"pagehide\", _e => {\n        if(this.conn){\n          this.disconnect()\n          awaitingConnectionOnPageShow = this.connectClock\n        }\n      })\n      phxWindow.addEventListener(\"pageshow\", _e => {\n        if(awaitingConnectionOnPageShow === this.connectClock){\n          awaitingConnectionOnPageShow = null\n          this.connect()\n        }\n      })\n    }\n    this.heartbeatIntervalMs = opts.heartbeatIntervalMs || 30000\n    this.rejoinAfterMs = (tries) => {\n      if(opts.rejoinAfterMs){\n        return opts.rejoinAfterMs(tries)\n      } else {\n        return [1000, 2000, 5000][tries - 1] || 10000\n      }\n    }\n    this.reconnectAfterMs = (tries) => {\n      if(opts.reconnectAfterMs){\n        return opts.reconnectAfterMs(tries)\n      } else {\n        return [10, 50, 100, 150, 200, 250, 500, 1000, 2000][tries - 1] || 5000\n      }\n    }\n    this.logger = opts.logger || null\n    this.longpollerTimeout = opts.longpollerTimeout || 20000\n    this.params = closure(opts.params || {})\n    this.endPoint = `${endPoint}/${TRANSPORTS.websocket}`\n    this.vsn = opts.vsn || DEFAULT_VSN\n    this.heartbeatTimeoutTimer = null\n    this.heartbeatTimer = null\n    this.pendingHeartbeatRef = null\n    this.reconnectTimer = new Timer(() => {\n      this.teardown(() => this.connect())\n    }, this.reconnectAfterMs)\n  }\n\n  /**\n   * Returns the LongPoll transport reference\n   */\n  getLongPollTransport(){ return LongPoll }\n\n  /**\n   * Disconnects and replaces the active transport\n   *\n   * @param {Function} newTransport - The new transport class to instantiate\n   *\n   */\n  replaceTransport(newTransport){\n    this.connectClock++\n    this.closeWasClean = true\n    this.reconnectTimer.reset()\n    this.sendBuffer = []\n    if(this.conn){\n      this.conn.close()\n      this.conn = null\n    }\n    this.transport = newTransport\n  }\n\n  /**\n   * Returns the socket protocol\n   *\n   * @returns {string}\n   */\n  protocol(){ return location.protocol.match(/^https/) ? \"wss\" : \"ws\" }\n\n  /**\n   * The fully qualified socket url\n   *\n   * @returns {string}\n   */\n  endPointURL(){\n    let uri = Ajax.appendParams(\n      Ajax.appendParams(this.endPoint, this.params()), {vsn: this.vsn})\n    if(uri.charAt(0) !== \"/\"){ return uri }\n    if(uri.charAt(1) === \"/\"){ return `${this.protocol()}:${uri}` }\n\n    return `${this.protocol()}://${location.host}${uri}`\n  }\n\n  /**\n   * Disconnects the socket\n   *\n   * See https://developer.mozilla.org/en-US/docs/Web/API/CloseEvent#Status_codes for valid status codes.\n   *\n   * @param {Function} callback - Optional callback which is called after socket is disconnected.\n   * @param {integer} code - A status code for disconnection (Optional).\n   * @param {string} reason - A textual description of the reason to disconnect. (Optional)\n   */\n  disconnect(callback, code, reason){\n    this.connectClock++\n    this.closeWasClean = true\n    this.reconnectTimer.reset()\n    this.teardown(callback, code, reason)\n  }\n\n  /**\n   *\n   * @param {Object} params - The params to send when connecting, for example `{user_id: userToken}`\n   *\n   * Passing params to connect is deprecated; pass them in the Socket constructor instead:\n   * `new Socket(\"/socket\", {params: {user_id: userToken}})`.\n   */\n  connect(params){\n    if(params){\n      console && console.log(\"passing params to connect is deprecated. Instead pass :params to the Socket constructor\")\n      this.params = closure(params)\n    }\n    if(this.conn){ return }\n\n    this.connectClock++\n    this.closeWasClean = false\n    this.conn = new this.transport(this.endPointURL())\n    this.conn.binaryType = this.binaryType\n    this.conn.timeout = this.longpollerTimeout\n    this.conn.onopen = () => this.onConnOpen()\n    this.conn.onerror = error => this.onConnError(error)\n    this.conn.onmessage = event => this.onConnMessage(event)\n    this.conn.onclose = event => this.onConnClose(event)\n  }\n\n  /**\n   * Logs the message. Override `this.logger` for specialized logging. noops by default\n   * @param {string} kind\n   * @param {string} msg\n   * @param {Object} data\n   */\n  log(kind, msg, data){ this.logger(kind, msg, data) }\n\n  /**\n   * Returns true if a logger has been set on this socket.\n   */\n  hasLogger(){ return this.logger !== null }\n\n  /**\n   * Registers callbacks for connection open events\n   *\n   * @example socket.onOpen(function(){ console.info(\"the socket was opened\") })\n   *\n   * @param {Function} callback\n   */\n  onOpen(callback){\n    let ref = this.makeRef()\n    this.stateChangeCallbacks.open.push([ref, callback])\n    return ref\n  }\n\n  /**\n   * Registers callbacks for connection close events\n   * @param {Function} callback\n   */\n  onClose(callback){\n    let ref = this.makeRef()\n    this.stateChangeCallbacks.close.push([ref, callback])\n    return ref\n  }\n\n  /**\n   * Registers callbacks for connection error events\n   *\n   * @example socket.onError(function(error){ alert(\"An error occurred\") })\n   *\n   * @param {Function} callback\n   */\n  onError(callback){\n    let ref = this.makeRef()\n    this.stateChangeCallbacks.error.push([ref, callback])\n    return ref\n  }\n\n  /**\n   * Registers callbacks for connection message events\n   * @param {Function} callback\n   */\n  onMessage(callback){\n    let ref = this.makeRef()\n    this.stateChangeCallbacks.message.push([ref, callback])\n    return ref\n  }\n\n  /**\n   * Pings the server and invokes the callback with the RTT in milliseconds\n   * @param {Function} callback\n   *\n   * Returns true if the ping was pushed or false if unable to be pushed.\n   */\n  ping(callback){\n    if(!this.isConnected()){ return false }\n    let ref = this.makeRef()\n    let startTime = Date.now()\n    this.push({topic: \"phoenix\", event: \"heartbeat\", payload: {}, ref: ref})\n    let onMsgRef = this.onMessage(msg => {\n      if(msg.ref === ref){\n        this.off([onMsgRef])\n        callback(Date.now() - startTime)\n      }\n    })\n    return true\n  }\n\n  /**\n   * @private\n   */\n\n  clearHeartbeats(){\n    clearTimeout(this.heartbeatTimer)\n    clearTimeout(this.heartbeatTimeoutTimer)\n  }\n\n  onConnOpen(){\n    if(this.hasLogger()) this.log(\"transport\", `connected to ${this.endPointURL()}`)\n    this.closeWasClean = false\n    this.establishedConnections++\n    this.flushSendBuffer()\n    this.reconnectTimer.reset()\n    this.resetHeartbeat()\n    this.stateChangeCallbacks.open.forEach(([, callback]) => callback())\n  }\n\n  /**\n   * @private\n   */\n\n  heartbeatTimeout(){\n    if(this.pendingHeartbeatRef){\n      this.pendingHeartbeatRef = null\n      if(this.hasLogger()){ this.log(\"transport\", \"heartbeat timeout. Attempting to re-establish connection\") }\n      this.triggerChanError()\n      this.closeWasClean = false\n      this.teardown(() => this.reconnectTimer.scheduleTimeout(), WS_CLOSE_NORMAL, \"heartbeat timeout\")\n    }\n  }\n\n  resetHeartbeat(){\n    if(this.conn && this.conn.skipHeartbeat){ return }\n    this.pendingHeartbeatRef = null\n    this.clearHeartbeats()\n    this.heartbeatTimer = setTimeout(() => this.sendHeartbeat(), this.heartbeatIntervalMs)\n  }\n\n  teardown(callback, code, reason){\n    if(!this.conn){\n      return callback && callback()\n    }\n\n    this.waitForBufferDone(() => {\n      if(this.conn){\n        if(code){ this.conn.close(code, reason || \"\") } else { this.conn.close() }\n      }\n\n      this.waitForSocketClosed(() => {\n        if(this.conn){\n          this.conn.onopen = function (){ } // noop\n          this.conn.onerror = function (){ } // noop\n          this.conn.onmessage = function (){ } // noop\n          this.conn.onclose = function (){ } // noop\n          this.conn = null\n        }\n\n        callback && callback()\n      })\n    })\n  }\n\n  waitForBufferDone(callback, tries = 1){\n    if(tries === 5 || !this.conn || !this.conn.bufferedAmount){\n      callback()\n      return\n    }\n\n    setTimeout(() => {\n      this.waitForBufferDone(callback, tries + 1)\n    }, 150 * tries)\n  }\n\n  waitForSocketClosed(callback, tries = 1){\n    if(tries === 5 || !this.conn || this.conn.readyState === SOCKET_STATES.closed){\n      callback()\n      return\n    }\n\n    setTimeout(() => {\n      this.waitForSocketClosed(callback, tries + 1)\n    }, 150 * tries)\n  }\n\n  onConnClose(event){\n    let closeCode = event && event.code\n    if(this.hasLogger()) this.log(\"transport\", \"close\", event)\n    this.triggerChanError()\n    this.clearHeartbeats()\n    if(!this.closeWasClean && closeCode !== 1000){\n      this.reconnectTimer.scheduleTimeout()\n    }\n    this.stateChangeCallbacks.close.forEach(([, callback]) => callback(event))\n  }\n\n  /**\n   * @private\n   */\n  onConnError(error){\n    if(this.hasLogger()) this.log(\"transport\", error)\n    let transportBefore = this.transport\n    let establishedBefore = this.establishedConnections\n    this.stateChangeCallbacks.error.forEach(([, callback]) => {\n      callback(error, transportBefore, establishedBefore)\n    })\n    if(transportBefore === this.transport || establishedBefore > 0){\n      this.triggerChanError()\n    }\n  }\n\n  /**\n   * @private\n   */\n  triggerChanError(){\n    this.channels.forEach(channel => {\n      if(!(channel.isErrored() || channel.isLeaving() || channel.isClosed())){\n        channel.trigger(CHANNEL_EVENTS.error)\n      }\n    })\n  }\n\n  /**\n   * @returns {string}\n   */\n  connectionState(){\n    switch(this.conn && this.conn.readyState){\n      case SOCKET_STATES.connecting: return \"connecting\"\n      case SOCKET_STATES.open: return \"open\"\n      case SOCKET_STATES.closing: return \"closing\"\n      default: return \"closed\"\n    }\n  }\n\n  /**\n   * @returns {boolean}\n   */\n  isConnected(){ return this.connectionState() === \"open\" }\n\n  /**\n   * @private\n   *\n   * @param {Channel}\n   */\n  remove(channel){\n    this.off(channel.stateChangeRefs)\n    this.channels = this.channels.filter(c => c.joinRef() !== channel.joinRef())\n  }\n\n  /**\n   * Removes `onOpen`, `onClose`, `onError,` and `onMessage` registrations.\n   *\n   * @param {refs} - list of refs returned by calls to\n   *                 `onOpen`, `onClose`, `onError,` and `onMessage`\n   */\n  off(refs){\n    for(let key in this.stateChangeCallbacks){\n      this.stateChangeCallbacks[key] = this.stateChangeCallbacks[key].filter(([ref]) => {\n        return refs.indexOf(ref) === -1\n      })\n    }\n  }\n\n  /**\n   * Initiates a new channel for the given topic\n   *\n   * @param {string} topic\n   * @param {Object} chanParams - Parameters for the channel\n   * @returns {Channel}\n   */\n  channel(topic, chanParams = {}){\n    let chan = new Channel(topic, chanParams, this)\n    this.channels.push(chan)\n    return chan\n  }\n\n  /**\n   * @param {Object} data\n   */\n  push(data){\n    if(this.hasLogger()){\n      let {topic, event, payload, ref, join_ref} = data\n      this.log(\"push\", `${topic} ${event} (${join_ref}, ${ref})`, payload)\n    }\n\n    if(this.isConnected()){\n      this.encode(data, result => this.conn.send(result))\n    } else {\n      this.sendBuffer.push(() => this.encode(data, result => this.conn.send(result)))\n    }\n  }\n\n  /**\n   * Return the next message ref, accounting for overflows\n   * @returns {string}\n   */\n  makeRef(){\n    let newRef = this.ref + 1\n    if(newRef === this.ref){ this.ref = 0 } else { this.ref = newRef }\n\n    return this.ref.toString()\n  }\n\n  sendHeartbeat(){\n    if(this.pendingHeartbeatRef && !this.isConnected()){ return }\n    this.pendingHeartbeatRef = this.makeRef()\n    this.push({topic: \"phoenix\", event: \"heartbeat\", payload: {}, ref: this.pendingHeartbeatRef})\n    this.heartbeatTimeoutTimer = setTimeout(() => this.heartbeatTimeout(), this.heartbeatIntervalMs)\n  }\n\n  flushSendBuffer(){\n    if(this.isConnected() && this.sendBuffer.length > 0){\n      this.sendBuffer.forEach(callback => callback())\n      this.sendBuffer = []\n    }\n  }\n\n  onConnMessage(rawMessage){\n    this.decode(rawMessage.data, msg => {\n      let {topic, event, payload, ref, join_ref} = msg\n      if(ref && ref === this.pendingHeartbeatRef){\n        this.clearHeartbeats()\n        this.pendingHeartbeatRef = null\n        this.heartbeatTimer = setTimeout(() => this.sendHeartbeat(), this.heartbeatIntervalMs)\n      }\n\n      if(this.hasLogger()) this.log(\"receive\", `${payload.status || \"\"} ${topic} ${event} ${ref && \"(\" + ref + \")\" || \"\"}`, payload)\n\n      for(let i = 0; i < this.channels.length; i++){\n        const channel = this.channels[i]\n        if(!channel.isMember(topic, event, payload, join_ref)){ continue }\n        channel.trigger(event, payload, ref, join_ref)\n      }\n\n      for(let i = 0; i < this.stateChangeCallbacks.message.length; i++){\n        let [, callback] = this.stateChangeCallbacks.message[i]\n        callback(msg)\n      }\n    })\n  }\n\n  leaveOpenTopic(topic){\n    let dupChannel = this.channels.find(c => c.topic === topic && (c.isJoined() || c.isJoining()))\n    if(dupChannel){\n      if(this.hasLogger()) this.log(\"transport\", `leaving duplicate topic \"${topic}\"`)\n      dupChannel.leave()\n    }\n  }\n}"],
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