phoenix.cjs.js

var __defProp = Object.defineProperty;
var __getOwnPropDesc = Object.getOwnPropertyDescriptor;
var __getOwnPropNames = Object.getOwnPropertyNames;
var __hasOwnProp = Object.prototype.hasOwnProperty;
var __export = (target, all) => {
  for (var name in all)
    __defProp(target, name, { get: all[name], enumerable: true });
};
var __copyProps = (to, from, except, desc) => {
  if (from && typeof from === "object" || typeof from === "function") {
    for (let key of __getOwnPropNames(from))
      if (!__hasOwnProp.call(to, key) && key !== except)
        __defProp(to, key, { get: () => from[key], enumerable: !(desc = __getOwnPropDesc(from, key)) || desc.enumerable });
  }
  return to;
};
var __toCommonJS = (mod) => __copyProps(__defProp({}, "__esModule", { value: true }), mod);

// js/phoenix/index.js
var phoenix_exports = {};
__export(phoenix_exports, {
  Channel: () => Channel,
  LongPoll: () => LongPoll,
  Presence: () => Presence,
  Serializer: () => serializer_default,
  Socket: () => Socket
});
module.exports = __toCommonJS(phoenix_exports);

// js/phoenix/utils.js
var closure = (value) => {
  if (typeof value === "function") {
    return value;
  } else {
    let closure2 = function() {
      return value;
    };
    return closure2;
  }
};

// js/phoenix/constants.js
var globalSelf = typeof self !== "undefined" ? self : null;
var phxWindow = typeof window !== "undefined" ? window : null;
var global = globalSelf || phxWindow || global;
var DEFAULT_VSN = "2.0.0";
var SOCKET_STATES = { connecting: 0, open: 1, closing: 2, closed: 3 };
var DEFAULT_TIMEOUT = 1e4;
var WS_CLOSE_NORMAL = 1e3;
var CHANNEL_STATES = {
  closed: "closed",
  errored: "errored",
  joined: "joined",
  joining: "joining",
  leaving: "leaving"
};
var CHANNEL_EVENTS = {
  close: "phx_close",
  error: "phx_error",
  join: "phx_join",
  reply: "phx_reply",
  leave: "phx_leave"
};
var TRANSPORTS = {
  longpoll: "longpoll",
  websocket: "websocket"
};
var XHR_STATES = {
  complete: 4
};

// js/phoenix/push.js
var Push = class {
  constructor(channel, event, payload, timeout) {
    this.channel = channel;
    this.event = event;
    this.payload = payload || function() {
      return {};
    };
    this.receivedResp = null;
    this.timeout = timeout;
    this.timeoutTimer = null;
    this.recHooks = [];
    this.sent = false;
  }
  /**
   *
   * @param {number} timeout
   */
  resend(timeout) {
    this.timeout = timeout;
    this.reset();
    this.send();
  }
  /**
   *
   */
  send() {
    if (this.hasReceived("timeout")) {
      return;
    }
    this.startTimeout();
    this.sent = true;
    this.channel.socket.push({
      topic: this.channel.topic,
      event: this.event,
      payload: this.payload(),
      ref: this.ref,
      join_ref: this.channel.joinRef()
    });
  }
  /**
   *
   * @param {*} status
   * @param {*} callback
   */
  receive(status, callback) {
    if (this.hasReceived(status)) {
      callback(this.receivedResp.response);
    }
    this.recHooks.push({ status, callback });
    return this;
  }
  /**
   * @private
   */
  reset() {
    this.cancelRefEvent();
    this.ref = null;
    this.refEvent = null;
    this.receivedResp = null;
    this.sent = false;
  }
  /**
   * @private
   */
  matchReceive({ status, response, _ref }) {
    this.recHooks.filter((h) => h.status === status).forEach((h) => h.callback(response));
  }
  /**
   * @private
   */
  cancelRefEvent() {
    if (!this.refEvent) {
      return;
    }
    this.channel.off(this.refEvent);
  }
  /**
   * @private
   */
  cancelTimeout() {
    clearTimeout(this.timeoutTimer);
    this.timeoutTimer = null;
  }
  /**
   * @private
   */
  startTimeout() {
    if (this.timeoutTimer) {
      this.cancelTimeout();
    }
    this.ref = this.channel.socket.makeRef();
    this.refEvent = this.channel.replyEventName(this.ref);
    this.channel.on(this.refEvent, (payload) => {
      this.cancelRefEvent();
      this.cancelTimeout();
      this.receivedResp = payload;
      this.matchReceive(payload);
    });
    this.timeoutTimer = setTimeout(() => {
      this.trigger("timeout", {});
    }, this.timeout);
  }
  /**
   * @private
   */
  hasReceived(status) {
    return this.receivedResp && this.receivedResp.status === status;
  }
  /**
   * @private
   */
  trigger(status, response) {
    this.channel.trigger(this.refEvent, { status, response });
  }
};

// js/phoenix/timer.js
var Timer = class {
  constructor(callback, timerCalc) {
    this.callback = callback;
    this.timerCalc = timerCalc;
    this.timer = null;
    this.tries = 0;
  }
  reset() {
    this.tries = 0;
    clearTimeout(this.timer);
  }
  /**
   * Cancels any previous scheduleTimeout and schedules callback
   */
  scheduleTimeout() {
    clearTimeout(this.timer);
    this.timer = setTimeout(() => {
      this.tries = this.tries + 1;
      this.callback();
    }, this.timerCalc(this.tries + 1));
  }
};

// js/phoenix/channel.js
var Channel = class {
  constructor(topic, params, socket) {
    this.state = CHANNEL_STATES.closed;
    this.topic = topic;
    this.params = closure(params || {});
    this.socket = socket;
    this.bindings = [];
    this.bindingRef = 0;
    this.timeout = this.socket.timeout;
    this.joinedOnce = false;
    this.joinPush = new Push(this, CHANNEL_EVENTS.join, this.params, this.timeout);
    this.pushBuffer = [];
    this.stateChangeRefs = [];
    this.rejoinTimer = new Timer(() => {
      if (this.socket.isConnected()) {
        this.rejoin();
      }
    }, this.socket.rejoinAfterMs);
    this.stateChangeRefs.push(this.socket.onError(() => this.rejoinTimer.reset()));
    this.stateChangeRefs.push(
      this.socket.onOpen(() => {
        this.rejoinTimer.reset();
        if (this.isErrored()) {
          this.rejoin();
        }
      })
    );
    this.joinPush.receive("ok", () => {
      this.state = CHANNEL_STATES.joined;
      this.rejoinTimer.reset();
      this.pushBuffer.forEach((pushEvent) => pushEvent.send());
      this.pushBuffer = [];
    });
    this.joinPush.receive("error", () => {
      this.state = CHANNEL_STATES.errored;
      if (this.socket.isConnected()) {
        this.rejoinTimer.scheduleTimeout();
      }
    });
    this.onClose(() => {
      this.rejoinTimer.reset();
      if (this.socket.hasLogger())
        this.socket.log("channel", `close ${this.topic} ${this.joinRef()}`);
      this.state = CHANNEL_STATES.closed;
      this.socket.remove(this);
    });
    this.onError((reason) => {
      if (this.socket.hasLogger())
        this.socket.log("channel", `error ${this.topic}`, reason);
      if (this.isJoining()) {
        this.joinPush.reset();
      }
      this.state = CHANNEL_STATES.errored;
      if (this.socket.isConnected()) {
        this.rejoinTimer.scheduleTimeout();
      }
    });
    this.joinPush.receive("timeout", () => {
      if (this.socket.hasLogger())
        this.socket.log("channel", `timeout ${this.topic} (${this.joinRef()})`, this.joinPush.timeout);
      let leavePush = new Push(this, CHANNEL_EVENTS.leave, closure({}), this.timeout);
      leavePush.send();
      this.state = CHANNEL_STATES.errored;
      this.joinPush.reset();
      if (this.socket.isConnected()) {
        this.rejoinTimer.scheduleTimeout();
      }
    });
    this.on(CHANNEL_EVENTS.reply, (payload, ref) => {
      this.trigger(this.replyEventName(ref), payload);
    });
  }
  /**
   * Join the channel
   * @param {integer} timeout
   * @returns {Push}
   */
  join(timeout = this.timeout) {
    if (this.joinedOnce) {
      throw new Error("tried to join multiple times. 'join' can only be called a single time per channel instance");
    } else {
      this.timeout = timeout;
      this.joinedOnce = true;
      this.rejoin();
      return this.joinPush;
    }
  }
  /**
   * Hook into channel close
   * @param {Function} callback
   */
  onClose(callback) {
    this.on(CHANNEL_EVENTS.close, callback);
  }
  /**
   * Hook into channel errors
   * @param {Function} callback
   */
  onError(callback) {
    return this.on(CHANNEL_EVENTS.error, (reason) => callback(reason));
  }
  /**
   * Subscribes on channel events
   *
   * Subscription returns a ref counter, which can be used later to
   * unsubscribe the exact event listener
   *
   * @example
   * const ref1 = channel.on("event", do_stuff)
   * const ref2 = channel.on("event", do_other_stuff)
   * channel.off("event", ref1)
   * // Since unsubscription, do_stuff won't fire,
   * // while do_other_stuff will keep firing on the "event"
   *
   * @param {string} event
   * @param {Function} callback
   * @returns {integer} ref
   */
  on(event, callback) {
    let ref = this.bindingRef++;
    this.bindings.push({ event, ref, callback });
    return ref;
  }
  /**
   * Unsubscribes off of channel events
   *
   * Use the ref returned from a channel.on() to unsubscribe one
   * handler, or pass nothing for the ref to unsubscribe all
   * handlers for the given event.
   *
   * @example
   * // Unsubscribe the do_stuff handler
   * const ref1 = channel.on("event", do_stuff)
   * channel.off("event", ref1)
   *
   * // Unsubscribe all handlers from event
   * channel.off("event")
   *
   * @param {string} event
   * @param {integer} ref
   */
  off(event, ref) {
    this.bindings = this.bindings.filter((bind) => {
      return !(bind.event === event && (typeof ref === "undefined" || ref === bind.ref));
    });
  }
  /**
   * @private
   */
  canPush() {
    return this.socket.isConnected() && this.isJoined();
  }
  /**
   * Sends a message `event` to phoenix with the payload `payload`.
   * Phoenix receives this in the `handle_in(event, payload, socket)`
   * function. if phoenix replies or it times out (default 10000ms),
   * then optionally the reply can be received.
   *
   * @example
   * channel.push("event")
   *   .receive("ok", payload => console.log("phoenix replied:", payload))
   *   .receive("error", err => console.log("phoenix errored", err))
   *   .receive("timeout", () => console.log("timed out pushing"))
   * @param {string} event
   * @param {Object} payload
   * @param {number} [timeout]
   * @returns {Push}
   */
  push(event, payload, timeout = this.timeout) {
    payload = payload || {};
    if (!this.joinedOnce) {
      throw new Error(`tried to push '${event}' to '${this.topic}' before joining. Use channel.join() before pushing events`);
    }
    let pushEvent = new Push(this, event, function() {
      return payload;
    }, timeout);
    if (this.canPush()) {
      pushEvent.send();
    } else {
      pushEvent.startTimeout();
      this.pushBuffer.push(pushEvent);
    }
    return pushEvent;
  }
  /** Leaves the channel
   *
   * Unsubscribes from server events, and
   * instructs channel to terminate on server
   *
   * Triggers onClose() hooks
   *
   * To receive leave acknowledgements, use the `receive`
   * hook to bind to the server ack, ie:
   *
   * @example
   * channel.leave().receive("ok", () => alert("left!") )
   *
   * @param {integer} timeout
   * @returns {Push}
   */
  leave(timeout = this.timeout) {
    this.rejoinTimer.reset();
    this.joinPush.cancelTimeout();
    this.state = CHANNEL_STATES.leaving;
    let onClose = () => {
      if (this.socket.hasLogger())
        this.socket.log("channel", `leave ${this.topic}`);
      this.trigger(CHANNEL_EVENTS.close, "leave");
    };
    let leavePush = new Push(this, CHANNEL_EVENTS.leave, closure({}), timeout);
    leavePush.receive("ok", () => onClose()).receive("timeout", () => onClose());
    leavePush.send();
    if (!this.canPush()) {
      leavePush.trigger("ok", {});
    }
    return leavePush;
  }
  /**
   * Overridable message hook
   *
   * Receives all events for specialized message handling
   * before dispatching to the channel callbacks.
   *
   * Must return the payload, modified or unmodified
   * @param {string} event
   * @param {Object} payload
   * @param {integer} ref
   * @returns {Object}
   */
  onMessage(_event, payload, _ref) {
    return payload;
  }
  /**
   * @private
   */
  isMember(topic, event, payload, joinRef) {
    if (this.topic !== topic) {
      return false;
    }
    if (joinRef && joinRef !== this.joinRef()) {
      if (this.socket.hasLogger())
        this.socket.log("channel", "dropping outdated message", { topic, event, payload, joinRef });
      return false;
    } else {
      return true;
    }
  }
  /**
   * @private
   */
  joinRef() {
    return this.joinPush.ref;
  }
  /**
   * @private
   */
  rejoin(timeout = this.timeout) {
    if (this.isLeaving()) {
      return;
    }
    this.socket.leaveOpenTopic(this.topic);
    this.state = CHANNEL_STATES.joining;
    this.joinPush.resend(timeout);
  }
  /**
   * @private
   */
  trigger(event, payload, ref, joinRef) {
    let handledPayload = this.onMessage(event, payload, ref, joinRef);
    if (payload && !handledPayload) {
      throw new Error("channel onMessage callbacks must return the payload, modified or unmodified");
    }
    let eventBindings = this.bindings.filter((bind) => bind.event === event);
    for (let i = 0; i < eventBindings.length; i++) {
      let bind = eventBindings[i];
      bind.callback(handledPayload, ref, joinRef || this.joinRef());
    }
  }
  /**
   * @private
   */
  replyEventName(ref) {
    return `chan_reply_${ref}`;
  }
  /**
   * @private
   */
  isClosed() {
    return this.state === CHANNEL_STATES.closed;
  }
  /**
   * @private
   */
  isErrored() {
    return this.state === CHANNEL_STATES.errored;
  }
  /**
   * @private
   */
  isJoined() {
    return this.state === CHANNEL_STATES.joined;
  }
  /**
   * @private
   */
  isJoining() {
    return this.state === CHANNEL_STATES.joining;
  }
  /**
   * @private
   */
  isLeaving() {
    return this.state === CHANNEL_STATES.leaving;
  }
};

// js/phoenix/ajax.js
var Ajax = class {
  static request(method, endPoint, accept, body, timeout, ontimeout, callback) {
    if (global.XDomainRequest) {
      let req = new global.XDomainRequest();
      return this.xdomainRequest(req, method, endPoint, body, timeout, ontimeout, callback);
    } else {
      let req = new global.XMLHttpRequest();
      return this.xhrRequest(req, method, endPoint, accept, body, timeout, ontimeout, callback);
    }
  }
  static xdomainRequest(req, method, endPoint, body, timeout, ontimeout, callback) {
    req.timeout = timeout;
    req.open(method, endPoint);
    req.onload = () => {
      let response = this.parseJSON(req.responseText);
      callback && callback(response);
    };
    if (ontimeout) {
      req.ontimeout = ontimeout;
    }
    req.onprogress = () => {
    };
    req.send(body);
    return req;
  }
  static xhrRequest(req, method, endPoint, accept, body, timeout, ontimeout, callback) {
    req.open(method, endPoint, true);
    req.timeout = timeout;
    req.setRequestHeader("Content-Type", accept);
    req.onerror = () => callback && callback(null);
    req.onreadystatechange = () => {
      if (req.readyState === XHR_STATES.complete && callback) {
        let response = this.parseJSON(req.responseText);
        callback(response);
      }
    };
    if (ontimeout) {
      req.ontimeout = ontimeout;
    }
    req.send(body);
    return req;
  }
  static parseJSON(resp) {
    if (!resp || resp === "") {
      return null;
    }
    try {
      return JSON.parse(resp);
    } catch (e) {
      console && console.log("failed to parse JSON response", resp);
      return null;
    }
  }
  static serialize(obj, parentKey) {
    let queryStr = [];
    for (var key in obj) {
      if (!Object.prototype.hasOwnProperty.call(obj, key)) {
        continue;
      }
      let paramKey = parentKey ? `${parentKey}[${key}]` : key;
      let paramVal = obj[key];
      if (typeof paramVal === "object") {
        queryStr.push(this.serialize(paramVal, paramKey));
      } else {
        queryStr.push(encodeURIComponent(paramKey) + "=" + encodeURIComponent(paramVal));
      }
    }
    return queryStr.join("&");
  }
  static appendParams(url, params) {
    if (Object.keys(params).length === 0) {
      return url;
    }
    let prefix = url.match(/\?/) ? "&" : "?";
    return `${url}${prefix}${this.serialize(params)}`;
  }
};

// js/phoenix/longpoll.js
var arrayBufferToBase64 = (buffer) => {
  let binary = "";
  let bytes = new Uint8Array(buffer);
  let len = bytes.byteLength;
  for (let i = 0; i < len; i++) {
    binary += String.fromCharCode(bytes[i]);
  }
  return btoa(binary);
};
var LongPoll = class {
  constructor(endPoint) {
    this.endPoint = null;
    this.token = null;
    this.skipHeartbeat = true;
    this.reqs = /* @__PURE__ */ new Set();
    this.awaitingBatchAck = false;
    this.currentBatch = null;
    this.currentBatchTimer = null;
    this.batchBuffer = [];
    this.onopen = function() {
    };
    this.onerror = function() {
    };
    this.onmessage = function() {
    };
    this.onclose = function() {
    };
    this.pollEndpoint = this.normalizeEndpoint(endPoint);
    this.readyState = SOCKET_STATES.connecting;
    setTimeout(() => this.poll(), 0);
  }
  normalizeEndpoint(endPoint) {
    return endPoint.replace("ws://", "http://").replace("wss://", "https://").replace(new RegExp("(.*)/" + TRANSPORTS.websocket), "$1/" + TRANSPORTS.longpoll);
  }
  endpointURL() {
    return Ajax.appendParams(this.pollEndpoint, { token: this.token });
  }
  closeAndRetry(code, reason, wasClean) {
    this.close(code, reason, wasClean);
    this.readyState = SOCKET_STATES.connecting;
  }
  ontimeout() {
    this.onerror("timeout");
    this.closeAndRetry(1005, "timeout", false);
  }
  isActive() {
    return this.readyState === SOCKET_STATES.open || this.readyState === SOCKET_STATES.connecting;
  }
  poll() {
    this.ajax("GET", "application/json", null, () => this.ontimeout(), (resp) => {
      if (resp) {
        var { status, token, messages } = resp;
        this.token = token;
      } else {
        status = 0;
      }
      switch (status) {
        case 200:
          messages.forEach((msg) => {
            setTimeout(() => this.onmessage({ data: msg }), 0);
          });
          this.poll();
          break;
        case 204:
          this.poll();
          break;
        case 410:
          this.readyState = SOCKET_STATES.open;
          this.onopen({});
          this.poll();
          break;
        case 403:
          this.onerror(403);
          this.close(1008, "forbidden", false);
          break;
        case 0:
        case 500:
          this.onerror(500);
          this.closeAndRetry(1011, "internal server error", 500);
          break;
        default:
          throw new Error(`unhandled poll status ${status}`);
      }
    });
  }
  // we collect all pushes within the current event loop by
  // setTimeout 0, which optimizes back-to-back procedural
  // pushes against an empty buffer
  send(body) {
    if (typeof body !== "string") {
      body = arrayBufferToBase64(body);
    }
    if (this.currentBatch) {
      this.currentBatch.push(body);
    } else if (this.awaitingBatchAck) {
      this.batchBuffer.push(body);
    } else {
      this.currentBatch = [body];
      this.currentBatchTimer = setTimeout(() => {
        this.batchSend(this.currentBatch);
        this.currentBatch = null;
      }, 0);
    }
  }
  batchSend(messages) {
    this.awaitingBatchAck = true;
    this.ajax("POST", "application/x-ndjson", messages.join("\n"), () => this.onerror("timeout"), (resp) => {
      this.awaitingBatchAck = false;
      if (!resp || resp.status !== 200) {
        this.onerror(resp && resp.status);
        this.closeAndRetry(1011, "internal server error", false);
      } else if (this.batchBuffer.length > 0) {
        this.batchSend(this.batchBuffer);
        this.batchBuffer = [];
      }
    });
  }
  close(code, reason, wasClean) {
    for (let req of this.reqs) {
      req.abort();
    }
    this.readyState = SOCKET_STATES.closed;
    let opts = Object.assign({ code: 1e3, reason: void 0, wasClean: true }, { code, reason, wasClean });
    this.batchBuffer = [];
    clearTimeout(this.currentBatchTimer);
    this.currentBatchTimer = null;
    if (typeof CloseEvent !== "undefined") {
      this.onclose(new CloseEvent("close", opts));
    } else {
      this.onclose(opts);
    }
  }
  ajax(method, contentType, body, onCallerTimeout, callback) {
    let req;
    let ontimeout = () => {
      this.reqs.delete(req);
      onCallerTimeout();
    };
    req = Ajax.request(method, this.endpointURL(), contentType, body, this.timeout, ontimeout, (resp) => {
      this.reqs.delete(req);
      if (this.isActive()) {
        callback(resp);
      }
    });
    this.reqs.add(req);
  }
};

// js/phoenix/presence.js
var Presence = class {
  constructor(channel, opts = {}) {
    let events = opts.events || { state: "presence_state", diff: "presence_diff" };
    this.state = {};
    this.pendingDiffs = [];
    this.channel = channel;
    this.joinRef = null;
    this.caller = {
      onJoin: function() {
      },
      onLeave: function() {
      },
      onSync: function() {
      }
    };
    this.channel.on(events.state, (newState) => {
      let { onJoin, onLeave, onSync } = this.caller;
      this.joinRef = this.channel.joinRef();
      this.state = Presence.syncState(this.state, newState, onJoin, onLeave);
      this.pendingDiffs.forEach((diff) => {
        this.state = Presence.syncDiff(this.state, diff, onJoin, onLeave);
      });
      this.pendingDiffs = [];
      onSync();
    });
    this.channel.on(events.diff, (diff) => {
      let { onJoin, onLeave, onSync } = this.caller;
      if (this.inPendingSyncState()) {
        this.pendingDiffs.push(diff);
      } else {
        this.state = Presence.syncDiff(this.state, diff, onJoin, onLeave);
        onSync();
      }
    });
  }
  onJoin(callback) {
    this.caller.onJoin = callback;
  }
  onLeave(callback) {
    this.caller.onLeave = callback;
  }
  onSync(callback) {
    this.caller.onSync = callback;
  }
  list(by) {
    return Presence.list(this.state, by);
  }
  inPendingSyncState() {
    return !this.joinRef || this.joinRef !== this.channel.joinRef();
  }
  // lower-level public static API
  /**
   * Used to sync the list of presences on the server
   * with the client's state. An optional `onJoin` and `onLeave` callback can
   * be provided to react to changes in the client's local presences across
   * disconnects and reconnects with the server.
   *
   * @returns {Presence}
   */
  static syncState(currentState, newState, onJoin, onLeave) {
    let state = this.clone(currentState);
    let joins = {};
    let leaves = {};
    this.map(state, (key, presence) => {
      if (!newState[key]) {
        leaves[key] = presence;
      }
    });
    this.map(newState, (key, newPresence) => {
      let currentPresence = state[key];
      if (currentPresence) {
        let newRefs = newPresence.metas.map((m) => m.phx_ref);
        let curRefs = currentPresence.metas.map((m) => m.phx_ref);
        let joinedMetas = newPresence.metas.filter((m) => curRefs.indexOf(m.phx_ref) < 0);
        let leftMetas = currentPresence.metas.filter((m) => newRefs.indexOf(m.phx_ref) < 0);
        if (joinedMetas.length > 0) {
          joins[key] = newPresence;
          joins[key].metas = joinedMetas;
        }
        if (leftMetas.length > 0) {
          leaves[key] = this.clone(currentPresence);
          leaves[key].metas = leftMetas;
        }
      } else {
        joins[key] = newPresence;
      }
    });
    return this.syncDiff(state, { joins, leaves }, onJoin, onLeave);
  }
  /**
   *
   * Used to sync a diff of presence join and leave
   * events from the server, as they happen. Like `syncState`, `syncDiff`
   * accepts optional `onJoin` and `onLeave` callbacks to react to a user
   * joining or leaving from a device.
   *
   * @returns {Presence}
   */
  static syncDiff(state, diff, onJoin, onLeave) {
    let { joins, leaves } = this.clone(diff);
    if (!onJoin) {
      onJoin = function() {
      };
    }
    if (!onLeave) {
      onLeave = function() {
      };
    }
    this.map(joins, (key, newPresence) => {
      let currentPresence = state[key];
      state[key] = this.clone(newPresence);
      if (currentPresence) {
        let joinedRefs = state[key].metas.map((m) => m.phx_ref);
        let curMetas = currentPresence.metas.filter((m) => joinedRefs.indexOf(m.phx_ref) < 0);
        state[key].metas.unshift(...curMetas);
      }
      onJoin(key, currentPresence, newPresence);
    });
    this.map(leaves, (key, leftPresence) => {
      let currentPresence = state[key];
      if (!currentPresence) {
        return;
      }
      let refsToRemove = leftPresence.metas.map((m) => m.phx_ref);
      currentPresence.metas = currentPresence.metas.filter((p) => {
        return refsToRemove.indexOf(p.phx_ref) < 0;
      });
      onLeave(key, currentPresence, leftPresence);
      if (currentPresence.metas.length === 0) {
        delete state[key];
      }
    });
    return state;
  }
  /**
   * Returns the array of presences, with selected metadata.
   *
   * @param {Object} presences
   * @param {Function} chooser
   *
   * @returns {Presence}
   */
  static list(presences, chooser) {
    if (!chooser) {
      chooser = function(key, pres) {
        return pres;
      };
    }
    return this.map(presences, (key, presence) => {
      return chooser(key, presence);
    });
  }
  // private
  static map(obj, func) {
    return Object.getOwnPropertyNames(obj).map((key) => func(key, obj[key]));
  }
  static clone(obj) {
    return JSON.parse(JSON.stringify(obj));
  }
};

// js/phoenix/serializer.js
var serializer_default = {
  HEADER_LENGTH: 1,
  META_LENGTH: 4,
  KINDS: { push: 0, reply: 1, broadcast: 2 },
  encode(msg, callback) {
    if (msg.payload.constructor === ArrayBuffer) {
      return callback(this.binaryEncode(msg));
    } else {
      let payload = [msg.join_ref, msg.ref, msg.topic, msg.event, msg.payload];
      return callback(JSON.stringify(payload));
    }
  },
  decode(rawPayload, callback) {
    if (rawPayload.constructor === ArrayBuffer) {
      return callback(this.binaryDecode(rawPayload));
    } else {
      let [join_ref, ref, topic, event, payload] = JSON.parse(rawPayload);
      return callback({ join_ref, ref, topic, event, payload });
    }
  },
  // private
  binaryEncode(message) {
    let { join_ref, ref, event, topic, payload } = message;
    let metaLength = this.META_LENGTH + join_ref.length + ref.length + topic.length + event.length;
    let header = new ArrayBuffer(this.HEADER_LENGTH + metaLength);
    let view = new DataView(header);
    let offset = 0;
    view.setUint8(offset++, this.KINDS.push);
    view.setUint8(offset++, join_ref.length);
    view.setUint8(offset++, ref.length);
    view.setUint8(offset++, topic.length);
    view.setUint8(offset++, event.length);
    Array.from(join_ref, (char) => view.setUint8(offset++, char.charCodeAt(0)));
    Array.from(ref, (char) => view.setUint8(offset++, char.charCodeAt(0)));
    Array.from(topic, (char) => view.setUint8(offset++, char.charCodeAt(0)));
    Array.from(event, (char) => view.setUint8(offset++, char.charCodeAt(0)));
    var combined = new Uint8Array(header.byteLength + payload.byteLength);
    combined.set(new Uint8Array(header), 0);
    combined.set(new Uint8Array(payload), header.byteLength);
    return combined.buffer;
  },
  binaryDecode(buffer) {
    let view = new DataView(buffer);
    let kind = view.getUint8(0);
    let decoder = new TextDecoder();
    switch (kind) {
      case this.KINDS.push:
        return this.decodePush(buffer, view, decoder);
      case this.KINDS.reply:
        return this.decodeReply(buffer, view, decoder);
      case this.KINDS.broadcast:
        return this.decodeBroadcast(buffer, view, decoder);
    }
  },
  decodePush(buffer, view, decoder) {
    let joinRefSize = view.getUint8(1);
    let topicSize = view.getUint8(2);
    let eventSize = view.getUint8(3);
    let offset = this.HEADER_LENGTH + this.META_LENGTH - 1;
    let joinRef = decoder.decode(buffer.slice(offset, offset + joinRefSize));
    offset = offset + joinRefSize;
    let topic = decoder.decode(buffer.slice(offset, offset + topicSize));
    offset = offset + topicSize;
    let event = decoder.decode(buffer.slice(offset, offset + eventSize));
    offset = offset + eventSize;
    let data = buffer.slice(offset, buffer.byteLength);
    return { join_ref: joinRef, ref: null, topic, event, payload: data };
  },
  decodeReply(buffer, view, decoder) {
    let joinRefSize = view.getUint8(1);
    let refSize = view.getUint8(2);
    let topicSize = view.getUint8(3);
    let eventSize = view.getUint8(4);
    let offset = this.HEADER_LENGTH + this.META_LENGTH;
    let joinRef = decoder.decode(buffer.slice(offset, offset + joinRefSize));
    offset = offset + joinRefSize;
    let ref = decoder.decode(buffer.slice(offset, offset + refSize));
    offset = offset + refSize;
    let topic = decoder.decode(buffer.slice(offset, offset + topicSize));
    offset = offset + topicSize;
    let event = decoder.decode(buffer.slice(offset, offset + eventSize));
    offset = offset + eventSize;
    let data = buffer.slice(offset, buffer.byteLength);
    let payload = { status: event, response: data };
    return { join_ref: joinRef, ref, topic, event: CHANNEL_EVENTS.reply, payload };
  },
  decodeBroadcast(buffer, view, decoder) {
    let topicSize = view.getUint8(1);
    let eventSize = view.getUint8(2);
    let offset = this.HEADER_LENGTH + 2;
    let topic = decoder.decode(buffer.slice(offset, offset + topicSize));
    offset = offset + topicSize;
    let event = decoder.decode(buffer.slice(offset, offset + eventSize));
    offset = offset + eventSize;
    let data = buffer.slice(offset, buffer.byteLength);
    return { join_ref: null, ref: null, topic, event, payload: data };
  }
};

// js/phoenix/socket.js
var Socket = class {
  constructor(endPoint, opts = {}) {
    this.stateChangeCallbacks = { open: [], close: [], error: [], message: [] };
    this.channels = [];
    this.sendBuffer = [];
    this.ref = 0;
    this.timeout = opts.timeout || DEFAULT_TIMEOUT;
    this.transport = opts.transport || global.WebSocket || LongPoll;
    this.primaryPassedHealthCheck = false;
    this.longPollFallbackMs = opts.longPollFallbackMs;
    this.fallbackTimer = null;
    this.sessionStore = opts.sessionStorage || global.sessionStorage;
    this.establishedConnections = 0;
    this.defaultEncoder = serializer_default.encode.bind(serializer_default);
    this.defaultDecoder = serializer_default.decode.bind(serializer_default);
    this.closeWasClean = false;
    this.binaryType = opts.binaryType || "arraybuffer";
    this.connectClock = 1;
    if (this.transport !== LongPoll) {
      this.encode = opts.encode || this.defaultEncoder;
      this.decode = opts.decode || this.defaultDecoder;
    } else {
      this.encode = this.defaultEncoder;
      this.decode = this.defaultDecoder;
    }
    let awaitingConnectionOnPageShow = null;
    if (phxWindow && phxWindow.addEventListener) {
      phxWindow.addEventListener("pagehide", (_e) => {
        if (this.conn) {
          this.disconnect();
          awaitingConnectionOnPageShow = this.connectClock;
        }
      });
      phxWindow.addEventListener("pageshow", (_e) => {
        if (awaitingConnectionOnPageShow === this.connectClock) {
          awaitingConnectionOnPageShow = null;
          this.connect();
        }
      });
    }
    this.heartbeatIntervalMs = opts.heartbeatIntervalMs || 3e4;
    this.rejoinAfterMs = (tries) => {
      if (opts.rejoinAfterMs) {
        return opts.rejoinAfterMs(tries);
      } else {
        return [1e3, 2e3, 5e3][tries - 1] || 1e4;
      }
    };
    this.reconnectAfterMs = (tries) => {
      if (opts.reconnectAfterMs) {
        return opts.reconnectAfterMs(tries);
      } else {
        return [10, 50, 100, 150, 200, 250, 500, 1e3, 2e3][tries - 1] || 5e3;
      }
    };
    this.logger = opts.logger || null;
    if (!this.logger && opts.debug) {
      this.logger = (kind, msg, data) => {
        console.log(`${kind}: ${msg}`, data);
      };
    }
    this.longpollerTimeout = opts.longpollerTimeout || 2e4;
    this.params = closure(opts.params || {});
    this.endPoint = `${endPoint}/${TRANSPORTS.websocket}`;
    this.vsn = opts.vsn || DEFAULT_VSN;
    this.heartbeatTimeoutTimer = null;
    this.heartbeatTimer = null;
    this.pendingHeartbeatRef = null;
    this.reconnectTimer = new Timer(() => {
      this.teardown(() => this.connect());
    }, this.reconnectAfterMs);
  }
  /**
   * Returns the LongPoll transport reference
   */
  getLongPollTransport() {
    return LongPoll;
  }
  /**
   * Disconnects and replaces the active transport
   *
   * @param {Function} newTransport - The new transport class to instantiate
   *
   */
  replaceTransport(newTransport) {
    this.connectClock++;
    this.closeWasClean = true;
    clearTimeout(this.fallbackTimer);
    this.reconnectTimer.reset();
    if (this.conn) {
      this.conn.close();
      this.conn = null;
    }
    this.transport = newTransport;
  }
  /**
   * Returns the socket protocol
   *
   * @returns {string}
   */
  protocol() {
    return location.protocol.match(/^https/) ? "wss" : "ws";
  }
  /**
   * The fully qualified socket url
   *
   * @returns {string}
   */
  endPointURL() {
    let uri = Ajax.appendParams(
      Ajax.appendParams(this.endPoint, this.params()),
      { vsn: this.vsn }
    );
    if (uri.charAt(0) !== "/") {
      return uri;
    }
    if (uri.charAt(1) === "/") {
      return `${this.protocol()}:${uri}`;
    }
    return `${this.protocol()}://${location.host}${uri}`;
  }
  /**
   * Disconnects the socket
   *
   * See https://developer.mozilla.org/en-US/docs/Web/API/CloseEvent#Status_codes for valid status codes.
   *
   * @param {Function} callback - Optional callback which is called after socket is disconnected.
   * @param {integer} code - A status code for disconnection (Optional).
   * @param {string} reason - A textual description of the reason to disconnect. (Optional)
   */
  disconnect(callback, code, reason) {
    this.connectClock++;
    this.closeWasClean = true;
    clearTimeout(this.fallbackTimer);
    this.reconnectTimer.reset();
    this.teardown(callback, code, reason);
  }
  /**
   *
   * @param {Object} params - The params to send when connecting, for example `{user_id: userToken}`
   *
   * Passing params to connect is deprecated; pass them in the Socket constructor instead:
   * `new Socket("/socket", {params: {user_id: userToken}})`.
   */
  connect(params) {
    if (params) {
      console && console.log("passing params to connect is deprecated. Instead pass :params to the Socket constructor");
      this.params = closure(params);
    }
    if (this.conn) {
      return;
    }
    if (this.longPollFallbackMs && this.transport !== LongPoll) {
      this.connectWithFallback(LongPoll, this.longPollFallbackMs);
    } else {
      this.transportConnect();
    }
  }
  /**
   * Logs the message. Override `this.logger` for specialized logging. noops by default
   * @param {string} kind
   * @param {string} msg
   * @param {Object} data
   */
  log(kind, msg, data) {
    this.logger && this.logger(kind, msg, data);
  }
  /**
   * Returns true if a logger has been set on this socket.
   */
  hasLogger() {
    return this.logger !== null;
  }
  /**
   * Registers callbacks for connection open events
   *
   * @example socket.onOpen(function(){ console.info("the socket was opened") })
   *
   * @param {Function} callback
   */
  onOpen(callback) {
    let ref = this.makeRef();
    this.stateChangeCallbacks.open.push([ref, callback]);
    return ref;
  }
  /**
   * Registers callbacks for connection close events
   * @param {Function} callback
   */
  onClose(callback) {
    let ref = this.makeRef();
    this.stateChangeCallbacks.close.push([ref, callback]);
    return ref;
  }
  /**
   * Registers callbacks for connection error events
   *
   * @example socket.onError(function(error){ alert("An error occurred") })
   *
   * @param {Function} callback
   */
  onError(callback) {
    let ref = this.makeRef();
    this.stateChangeCallbacks.error.push([ref, callback]);
    return ref;
  }
  /**
   * Registers callbacks for connection message events
   * @param {Function} callback
   */
  onMessage(callback) {
    let ref = this.makeRef();
    this.stateChangeCallbacks.message.push([ref, callback]);
    return ref;
  }
  /**
   * Pings the server and invokes the callback with the RTT in milliseconds
   * @param {Function} callback
   *
   * Returns true if the ping was pushed or false if unable to be pushed.
   */
  ping(callback) {
    if (!this.isConnected()) {
      return false;
    }
    let ref = this.makeRef();
    let startTime = Date.now();
    this.push({ topic: "phoenix", event: "heartbeat", payload: {}, ref });
    let onMsgRef = this.onMessage((msg) => {
      if (msg.ref === ref) {
        this.off([onMsgRef]);
        callback(Date.now() - startTime);
      }
    });
    return true;
  }
  /**
   * @private
   */
  transportConnect() {
    this.connectClock++;
    this.closeWasClean = false;
    this.conn = new this.transport(this.endPointURL());
    this.conn.binaryType = this.binaryType;
    this.conn.timeout = this.longpollerTimeout;
    this.conn.onopen = () => this.onConnOpen();
    this.conn.onerror = (error) => this.onConnError(error);
    this.conn.onmessage = (event) => this.onConnMessage(event);
    this.conn.onclose = (event) => this.onConnClose(event);
  }
  getSession(key) {
    return this.sessionStore && this.sessionStore.getItem(key);
  }
  storeSession(key, val) {
    this.sessionStore && this.sessionStore.setItem(key, val);
  }
  connectWithFallback(fallbackTransport, fallbackThreshold = 2500) {
    clearTimeout(this.fallbackTimer);
    let established = false;
    let primaryTransport = true;
    let openRef, errorRef;
    let fallback = (reason) => {
      this.log("transport", `falling back to ${fallbackTransport.name}...`, reason);
      this.off([openRef, errorRef]);
      primaryTransport = false;
      this.replaceTransport(fallbackTransport);
      this.transportConnect();
    };
    if (this.getSession(`phx:fallback:${fallbackTransport.name}`)) {
      return fallback("memorized");
    }
    this.fallbackTimer = setTimeout(fallback, fallbackThreshold);
    errorRef = this.onError((reason) => {
      this.log("transport", "error", reason);
      if (primaryTransport && !established) {
        clearTimeout(this.fallbackTimer);
        fallback(reason);
      }
    });
    this.onOpen(() => {
      established = true;
      if (!primaryTransport) {
        if (!this.primaryPassedHealthCheck) {
          this.storeSession(`phx:fallback:${fallbackTransport.name}`, "true");
        }
        return this.log("transport", `established ${fallbackTransport.name} fallback`);
      }
      clearTimeout(this.fallbackTimer);
      this.fallbackTimer = setTimeout(fallback, fallbackThreshold);
      this.ping((rtt) => {
        this.log("transport", "connected to primary after", rtt);
        this.primaryPassedHealthCheck = true;
        clearTimeout(this.fallbackTimer);
      });
    });
    this.transportConnect();
  }
  clearHeartbeats() {
    clearTimeout(this.heartbeatTimer);
    clearTimeout(this.heartbeatTimeoutTimer);
  }
  onConnOpen() {
    if (this.hasLogger())
      this.log("transport", `${this.transport.name} connected to ${this.endPointURL()}`);
    this.closeWasClean = false;
    this.establishedConnections++;
    this.flushSendBuffer();
    this.reconnectTimer.reset();
    this.resetHeartbeat();
    this.stateChangeCallbacks.open.forEach(([, callback]) => callback());
  }
  /**
   * @private
   */
  heartbeatTimeout() {
    if (this.pendingHeartbeatRef) {
      this.pendingHeartbeatRef = null;
      if (this.hasLogger()) {
        this.log("transport", "heartbeat timeout. Attempting to re-establish connection");
      }
      this.triggerChanError();
      this.closeWasClean = false;
      this.teardown(() => this.reconnectTimer.scheduleTimeout(), WS_CLOSE_NORMAL, "heartbeat timeout");
    }
  }
  resetHeartbeat() {
    if (this.conn && this.conn.skipHeartbeat) {
      return;
    }
    this.pendingHeartbeatRef = null;
    this.clearHeartbeats();
    this.heartbeatTimer = setTimeout(() => this.sendHeartbeat(), this.heartbeatIntervalMs);
  }
  teardown(callback, code, reason) {
    if (!this.conn) {
      return callback && callback();
    }
    this.waitForBufferDone(() => {
      if (this.conn) {
        if (code) {
          this.conn.close(code, reason || "");
        } else {
          this.conn.close();
        }
      }
      this.waitForSocketClosed(() => {
        if (this.conn) {
          this.conn.onopen = function() {
          };
          this.conn.onerror = function() {
          };
          this.conn.onmessage = function() {
          };
          this.conn.onclose = function() {
          };
          this.conn = null;
        }
        callback && callback();
      });
    });
  }
  waitForBufferDone(callback, tries = 1) {
    if (tries === 5 || !this.conn || !this.conn.bufferedAmount) {
      callback();
      return;
    }
    setTimeout(() => {
      this.waitForBufferDone(callback, tries + 1);
    }, 150 * tries);
  }
  waitForSocketClosed(callback, tries = 1) {
    if (tries === 5 || !this.conn || this.conn.readyState === SOCKET_STATES.closed) {
      callback();
      return;
    }
    setTimeout(() => {
      this.waitForSocketClosed(callback, tries + 1);
    }, 150 * tries);
  }
  onConnClose(event) {
    let closeCode = event && event.code;
    if (this.hasLogger())
      this.log("transport", "close", event);
    this.triggerChanError();
    this.clearHeartbeats();
    if (!this.closeWasClean && closeCode !== 1e3) {
      this.reconnectTimer.scheduleTimeout();
    }
    this.stateChangeCallbacks.close.forEach(([, callback]) => callback(event));
  }
  /**
   * @private
   */
  onConnError(error) {
    if (this.hasLogger())
      this.log("transport", error);
    let transportBefore = this.transport;
    let establishedBefore = this.establishedConnections;
    this.stateChangeCallbacks.error.forEach(([, callback]) => {
      callback(error, transportBefore, establishedBefore);
    });
    if (transportBefore === this.transport || establishedBefore > 0) {
      this.triggerChanError();
    }
  }
  /**
   * @private
   */
  triggerChanError() {
    this.channels.forEach((channel) => {
      if (!(channel.isErrored() || channel.isLeaving() || channel.isClosed())) {
        channel.trigger(CHANNEL_EVENTS.error);
      }
    });
  }
  /**
   * @returns {string}
   */
  connectionState() {
    switch (this.conn && this.conn.readyState) {
      case SOCKET_STATES.connecting:
        return "connecting";
      case SOCKET_STATES.open:
        return "open";
      case SOCKET_STATES.closing:
        return "closing";
      default:
        return "closed";
    }
  }
  /**
   * @returns {boolean}
   */
  isConnected() {
    return this.connectionState() === "open";
  }
  /**
   * @private
   *
   * @param {Channel}
   */
  remove(channel) {
    this.off(channel.stateChangeRefs);
    this.channels = this.channels.filter((c) => c !== channel);
  }
  /**
   * Removes `onOpen`, `onClose`, `onError,` and `onMessage` registrations.
   *
   * @param {refs} - list of refs returned by calls to
   *                 `onOpen`, `onClose`, `onError,` and `onMessage`
   */
  off(refs) {
    for (let key in this.stateChangeCallbacks) {
      this.stateChangeCallbacks[key] = this.stateChangeCallbacks[key].filter(([ref]) => {
        return refs.indexOf(ref) === -1;
      });
    }
  }
  /**
   * Initiates a new channel for the given topic
   *
   * @param {string} topic
   * @param {Object} chanParams - Parameters for the channel
   * @returns {Channel}
   */
  channel(topic, chanParams = {}) {
    let chan = new Channel(topic, chanParams, this);
    this.channels.push(chan);
    return chan;
  }
  /**
   * @param {Object} data
   */
  push(data) {
    if (this.hasLogger()) {
      let { topic, event, payload, ref, join_ref } = data;
      this.log("push", `${topic} ${event} (${join_ref}, ${ref})`, payload);
    }
    if (this.isConnected()) {
      this.encode(data, (result) => this.conn.send(result));
    } else {
      this.sendBuffer.push(() => this.encode(data, (result) => this.conn.send(result)));
    }
  }
  /**
   * Return the next message ref, accounting for overflows
   * @returns {string}
   */
  makeRef() {
    let newRef = this.ref + 1;
    if (newRef === this.ref) {
      this.ref = 0;
    } else {
      this.ref = newRef;
    }
    return this.ref.toString();
  }
  sendHeartbeat() {
    if (this.pendingHeartbeatRef && !this.isConnected()) {
      return;
    }
    this.pendingHeartbeatRef = this.makeRef();
    this.push({ topic: "phoenix", event: "heartbeat", payload: {}, ref: this.pendingHeartbeatRef });
    this.heartbeatTimeoutTimer = setTimeout(() => this.heartbeatTimeout(), this.heartbeatIntervalMs);
  }
  flushSendBuffer() {
    if (this.isConnected() && this.sendBuffer.length > 0) {
      this.sendBuffer.forEach((callback) => callback());
      this.sendBuffer = [];
    }
  }
  onConnMessage(rawMessage) {
    this.decode(rawMessage.data, (msg) => {
      let { topic, event, payload, ref, join_ref } = msg;
      if (ref && ref === this.pendingHeartbeatRef) {
        this.clearHeartbeats();
        this.pendingHeartbeatRef = null;
        this.heartbeatTimer = setTimeout(() => this.sendHeartbeat(), this.heartbeatIntervalMs);
      }
      if (this.hasLogger())
        this.log("receive", `${payload.status || ""} ${topic} ${event} ${ref && "(" + ref + ")" || ""}`, payload);
      for (let i = 0; i < this.channels.length; i++) {
        const channel = this.channels[i];
        if (!channel.isMember(topic, event, payload, join_ref)) {
          continue;
        }
        channel.trigger(event, payload, ref, join_ref);
      }
      for (let i = 0; i < this.stateChangeCallbacks.message.length; i++) {
        let [, callback] = this.stateChangeCallbacks.message[i];
        callback(msg);
      }
    });
  }
  leaveOpenTopic(topic) {
    let dupChannel = this.channels.find((c) => c.topic === topic && (c.isJoined() || c.isJoining()));
    if (dupChannel) {
      if (this.hasLogger())
        this.log("transport", `leaving duplicate topic "${topic}"`);
      dupChannel.leave();
    }
  }
};
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