import

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diff --git a/priv/static/js/app.js b/priv/static/js/app.js
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+++ b/priv/static/js/app.js
@@ -0,0 +1,3 @@
+// for phoenix_html support, including form and button helpers
+// copy the following scripts into your javascript bundle:
+// * https://raw.githubusercontent.com/phoenixframework/phoenix_html/v2.10.0/priv/static/phoenix_html.js
\ No newline at end of file
diff --git a/priv/static/js/phoenix.js b/priv/static/js/phoenix.js
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index 0000000..c56e0dd
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+++ b/priv/static/js/phoenix.js
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+(function (global, factory) {
+typeof exports === 'object' ? factory(exports) :
+typeof define === 'function' && define.amd ? define(['exports'], factory) :
+factory(global.Phoenix = global.Phoenix || {});
+}(this, (function (exports) {
+"use strict";
+
+Object.defineProperty(exports, "__esModule", {
+  value: true
+});
+
+var _typeof = typeof Symbol === "function" && typeof Symbol.iterator === "symbol" ? function (obj) { return typeof obj; } : function (obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; };
+
+var _slicedToArray = function () { function sliceIterator(arr, i) { var _arr = []; var _n = true; var _d = false; var _e = undefined; try { for (var _i = arr[Symbol.iterator](), _s; !(_n = (_s = _i.next()).done); _n = true) { _arr.push(_s.value); if (i && _arr.length === i) break; } } catch (err) { _d = true; _e = err; } finally { try { if (!_n && _i["return"]) _i["return"](); } finally { if (_d) throw _e; } } return _arr; } return function (arr, i) { if (Array.isArray(arr)) { return arr; } else if (Symbol.iterator in Object(arr)) { return sliceIterator(arr, i); } else { throw new TypeError("Invalid attempt to destructure non-iterable instance"); } }; }();
+
+var _createClass = function () { function defineProperties(target, props) { for (var i = 0; i < props.length; i++) { var descriptor = props[i]; descriptor.enumerable = descriptor.enumerable || false; descriptor.configurable = true; if ("value" in descriptor) descriptor.writable = true; Object.defineProperty(target, descriptor.key, descriptor); } } return function (Constructor, protoProps, staticProps) { if (protoProps) defineProperties(Constructor.prototype, protoProps); if (staticProps) defineProperties(Constructor, staticProps); return Constructor; }; }();
+
+function _toConsumableArray(arr) { if (Array.isArray(arr)) { for (var i = 0, arr2 = Array(arr.length); i < arr.length; i++) { arr2[i] = arr[i]; } return arr2; } else { return Array.from(arr); } }
+
+function _classCallCheck(instance, Constructor) { if (!(instance instanceof Constructor)) { throw new TypeError("Cannot call a class as a function"); } }
+
+/**
+ * Phoenix Channels JavaScript client
+ *
+ * ## Socket Connection
+ *
+ * A single connection is established to the server and
+ * channels are multiplexed over the connection.
+ * Connect to the server using the `Socket` class:
+ *
+ * ```javascript
+ *     let socket = new Socket("/socket", {params: {userToken: "123"}})
+ *     socket.connect()
+ * ```
+ *
+ * The `Socket` constructor takes the mount point of the socket,
+ * the authentication params, as well as options that can be found in
+ * the Socket docs, such as configuring the `LongPoll` transport, and
+ * heartbeat.
+ *
+ * ## Channels
+ *
+ * Channels are isolated, concurrent processes on the server that
+ * subscribe to topics and broker events between the client and server.
+ * To join a channel, you must provide the topic, and channel params for
+ * authorization. Here's an example chat room example where `"new_msg"`
+ * events are listened for, messages are pushed to the server, and
+ * the channel is joined with ok/error/timeout matches:
+ *
+ * ```javascript
+ *     let channel = socket.channel("room:123", {token: roomToken})
+ *     channel.on("new_msg", msg => console.log("Got message", msg) )
+ *     $input.onEnter( e => {
+ *       channel.push("new_msg", {body: e.target.val}, 10000)
+ *        .receive("ok", (msg) => console.log("created message", msg) )
+ *        .receive("error", (reasons) => console.log("create failed", reasons) )
+ *        .receive("timeout", () => console.log("Networking issue...") )
+ *     })
+ *     channel.join()
+ *       .receive("ok", ({messages}) => console.log("catching up", messages) )
+ *       .receive("error", ({reason}) => console.log("failed join", reason) )
+ *       .receive("timeout", () => console.log("Networking issue. Still waiting...") )
+ *```
+ *
+ * ## Joining
+ *
+ * Creating a channel with `socket.channel(topic, params)`, binds the params to
+ * `channel.params`, which are sent up on `channel.join()`.
+ * Subsequent rejoins will send up the modified params for
+ * updating authorization params, or passing up last_message_id information.
+ * Successful joins receive an "ok" status, while unsuccessful joins
+ * receive "error".
+ *
+ * ## Duplicate Join Subscriptions
+ *
+ * While the client may join any number of topics on any number of channels,
+ * the client may only hold a single subscription for each unique topic at any
+ * given time. When attempting to create a duplicate subscription,
+ * the server will close the existing channel, log a warning, and
+ * spawn a new channel for the topic. The client will have their
+ * `channel.onClose` callbacks fired for the existing channel, and the new
+ * channel join will have its receive hooks processed as normal.
+ *
+ * ## Pushing Messages
+ *
+ * From the previous example, we can see that pushing messages to the server
+ * can be done with `channel.push(eventName, payload)` and we can optionally
+ * receive responses from the push. Additionally, we can use
+ * `receive("timeout", callback)` to abort waiting for our other `receive` hooks
+ *  and take action after some period of waiting. The default timeout is 5000ms.
+ *
+ *
+ * ## Socket Hooks
+ *
+ * Lifecycle events of the multiplexed connection can be hooked into via
+ * `socket.onError()` and `socket.onClose()` events, ie:
+ *
+ * ```javascript
+ *     socket.onError( () => console.log("there was an error with the connection!") )
+ *     socket.onClose( () => console.log("the connection dropped") )
+ * ```
+ *
+ *
+ * ## Channel Hooks
+ *
+ * For each joined channel, you can bind to `onError` and `onClose` events
+ * to monitor the channel lifecycle, ie:
+ *
+ * ```javascript
+ *     channel.onError( () => console.log("there was an error!") )
+ *     channel.onClose( () => console.log("the channel has gone away gracefully") )
+ * ```
+ *
+ * ### onError hooks
+ *
+ * `onError` hooks are invoked if the socket connection drops, or the channel
+ * crashes on the server. In either case, a channel rejoin is attempted
+ * automatically in an exponential backoff manner.
+ *
+ * ### onClose hooks
+ *
+ * `onClose` hooks are invoked only in two cases. 1) the channel explicitly
+ * closed on the server, or 2). The client explicitly closed, by calling
+ * `channel.leave()`
+ *
+ *
+ * ## Presence
+ *
+ * The `Presence` object provides features for syncing presence information
+ * from the server with the client and handling presences joining and leaving.
+ *
+ * ### Syncing initial state from the server
+ *
+ * `Presence.syncState` is 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.
+ *
+ * `Presence.syncDiff` is 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.
+ *
+ * ### Listing Presences
+ *
+ * `Presence.list` is used to return a list of presence information
+ * based on the local state of metadata. By default, all presence
+ * metadata is returned, but a `listBy` function can be supplied to
+ * allow the client to select which metadata to use for a given presence.
+ * For example, you may have a user online from different devices with
+ * a metadata status of "online", but they have set themselves to "away"
+ * on another device. In this case, the app may choose to use the "away"
+ * status for what appears on the UI. The example below defines a `listBy`
+ * function which prioritizes the first metadata which was registered for
+ * each user. This could be the first tab they opened, or the first device
+ * they came online from:
+ *
+ * ```javascript
+ *     let state = {}
+ *     state = Presence.syncState(state, stateFromServer)
+ *     let listBy = (id, {metas: [first, ...rest]}) => {
+ *       first.count = rest.length + 1 // count of this user's presences
+ *       first.id = id
+ *       return first
+ *     }
+ *     let onlineUsers = Presence.list(state, listBy)
+ * ```
+ *
+ *
+ * ### Example Usage
+ *```javascript
+ *     // detect if user has joined for the 1st time or from another tab/device
+ *     let onJoin = (id, current, newPres) => {
+ *       if(!current){
+ *         console.log("user has entered for the first time", newPres)
+ *       } else {
+ *         console.log("user additional presence", newPres)
+ *       }
+ *     }
+ *     // detect if user has left from all tabs/devices, or is still present
+ *     let onLeave = (id, current, leftPres) => {
+ *       if(current.metas.length === 0){
+ *         console.log("user has left from all devices", leftPres)
+ *       } else {
+ *         console.log("user left from a device", leftPres)
+ *       }
+ *     }
+ *     let presences = {} // client's initial empty presence state
+ *     // receive initial presence data from server, sent after join
+ *     myChannel.on("presence_state", state => {
+ *       presences = Presence.syncState(presences, state, onJoin, onLeave)
+ *       displayUsers(Presence.list(presences))
+ *     })
+ *     // receive "presence_diff" from server, containing join/leave events
+ *     myChannel.on("presence_diff", diff => {
+ *       presences = Presence.syncDiff(presences, diff, onJoin, onLeave)
+ *       this.setState({users: Presence.list(room.presences, listBy)})
+ *     })
+ * ```
+ * @module phoenix
+ */
+
+var VSN = "2.0.0";
+var SOCKET_STATES = { connecting: 0, open: 1, closing: 2, closed: 3 };
+var DEFAULT_TIMEOUT = 10000;
+var WS_CLOSE_NORMAL = 1000;
+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 CHANNEL_LIFECYCLE_EVENTS = [CHANNEL_EVENTS.close, CHANNEL_EVENTS.error, CHANNEL_EVENTS.join, CHANNEL_EVENTS.reply, CHANNEL_EVENTS.leave];
+var TRANSPORTS = {
+  longpoll: "longpoll",
+  websocket: "websocket"
+};
+
+/**
+ * Initializes the Push
+ * @param {Channel} channel - The Channel
+ * @param {string} event - The event, for example `"phx_join"`
+ * @param {Object} payload - The payload, for example `{user_id: 123}`
+ * @param {number} timeout - The push timeout in milliseconds
+ */
+
+var Push = function () {
+  function Push(channel, event, payload, timeout) {
+    _classCallCheck(this, Push);
+
+    this.channel = channel;
+    this.event = event;
+    this.payload = payload || {};
+    this.receivedResp = null;
+    this.timeout = timeout;
+    this.timeoutTimer = null;
+    this.recHooks = [];
+    this.sent = false;
+  }
+
+  /**
+   *
+   * @param {number} timeout
+   */
+
+
+  _createClass(Push, [{
+    key: "resend",
+    value: function resend(timeout) {
+      this.timeout = timeout;
+      this.reset();
+      this.send();
+    }
+
+    /**
+     *
+     */
+
+  }, {
+    key: "send",
+    value: function 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
+     */
+
+  }, {
+    key: "receive",
+    value: function receive(status, callback) {
+      if (this.hasReceived(status)) {
+        callback(this.receivedResp.response);
+      }
+
+      this.recHooks.push({ status: status, callback: callback });
+      return this;
+    }
+
+    // private
+
+  }, {
+    key: "reset",
+    value: function reset() {
+      this.cancelRefEvent();
+      this.ref = null;
+      this.refEvent = null;
+      this.receivedResp = null;
+      this.sent = false;
+    }
+  }, {
+    key: "matchReceive",
+    value: function matchReceive(_ref) {
+      var status = _ref.status,
+          response = _ref.response,
+          ref = _ref.ref;
+
+      this.recHooks.filter(function (h) {
+        return h.status === status;
+      }).forEach(function (h) {
+        return h.callback(response);
+      });
+    }
+  }, {
+    key: "cancelRefEvent",
+    value: function cancelRefEvent() {
+      if (!this.refEvent) {
+        return;
+      }
+      this.channel.off(this.refEvent);
+    }
+  }, {
+    key: "cancelTimeout",
+    value: function cancelTimeout() {
+      clearTimeout(this.timeoutTimer);
+      this.timeoutTimer = null;
+    }
+  }, {
+    key: "startTimeout",
+    value: function startTimeout() {
+      var _this = this;
+
+      if (this.timeoutTimer) {
+        this.cancelTimeout();
+      }
+      this.ref = this.channel.socket.makeRef();
+      this.refEvent = this.channel.replyEventName(this.ref);
+
+      this.channel.on(this.refEvent, function (payload) {
+        _this.cancelRefEvent();
+        _this.cancelTimeout();
+        _this.receivedResp = payload;
+        _this.matchReceive(payload);
+      });
+
+      this.timeoutTimer = setTimeout(function () {
+        _this.trigger("timeout", {});
+      }, this.timeout);
+    }
+  }, {
+    key: "hasReceived",
+    value: function hasReceived(status) {
+      return this.receivedResp && this.receivedResp.status === status;
+    }
+  }, {
+    key: "trigger",
+    value: function trigger(status, response) {
+      this.channel.trigger(this.refEvent, { status: status, response: response });
+    }
+  }]);
+
+  return Push;
+}();
+
+/**
+ *
+ * @param {string} topic
+ * @param {Object} params
+ * @param {Socket} socket
+ */
+
+
+var Channel = exports.Channel = function () {
+  function Channel(topic, params, socket) {
+    var _this2 = this;
+
+    _classCallCheck(this, Channel);
+
+    this.state = CHANNEL_STATES.closed;
+    this.topic = topic;
+    this.params = params || {};
+    this.socket = socket;
+    this.bindings = [];
+    this.timeout = this.socket.timeout;
+    this.joinedOnce = false;
+    this.joinPush = new Push(this, CHANNEL_EVENTS.join, this.params, this.timeout);
+    this.pushBuffer = [];
+    this.rejoinTimer = new Timer(function () {
+      return _this2.rejoinUntilConnected();
+    }, this.socket.reconnectAfterMs);
+    this.joinPush.receive("ok", function () {
+      _this2.state = CHANNEL_STATES.joined;
+      _this2.rejoinTimer.reset();
+      _this2.pushBuffer.forEach(function (pushEvent) {
+        return pushEvent.send();
+      });
+      _this2.pushBuffer = [];
+    });
+    this.onClose(function () {
+      _this2.rejoinTimer.reset();
+      _this2.socket.log("channel", "close " + _this2.topic + " " + _this2.joinRef());
+      _this2.state = CHANNEL_STATES.closed;
+      _this2.socket.remove(_this2);
+    });
+    this.onError(function (reason) {
+      if (_this2.isLeaving() || _this2.isClosed()) {
+        return;
+      }
+      _this2.socket.log("channel", "error " + _this2.topic, reason);
+      _this2.state = CHANNEL_STATES.errored;
+      _this2.rejoinTimer.scheduleTimeout();
+    });
+    this.joinPush.receive("timeout", function () {
+      if (!_this2.isJoining()) {
+        return;
+      }
+      _this2.socket.log("channel", "timeout " + _this2.topic + " (" + _this2.joinRef() + ")", _this2.joinPush.timeout);
+      var leavePush = new Push(_this2, CHANNEL_EVENTS.leave, {}, _this2.timeout);
+      leavePush.send();
+      _this2.state = CHANNEL_STATES.errored;
+      _this2.joinPush.reset();
+      _this2.rejoinTimer.scheduleTimeout();
+    });
+    this.on(CHANNEL_EVENTS.reply, function (payload, ref) {
+      _this2.trigger(_this2.replyEventName(ref), payload);
+    });
+  }
+
+  _createClass(Channel, [{
+    key: "rejoinUntilConnected",
+    value: function rejoinUntilConnected() {
+      this.rejoinTimer.scheduleTimeout();
+      if (this.socket.isConnected()) {
+        this.rejoin();
+      }
+    }
+  }, {
+    key: "join",
+    value: function join() {
+      var timeout = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : this.timeout;
+
+      if (this.joinedOnce) {
+        throw "tried to join multiple times. 'join' can only be called a single time per channel instance";
+      } else {
+        this.joinedOnce = true;
+        this.rejoin(timeout);
+        return this.joinPush;
+      }
+    }
+  }, {
+    key: "onClose",
+    value: function onClose(callback) {
+      this.on(CHANNEL_EVENTS.close, callback);
+    }
+  }, {
+    key: "onError",
+    value: function onError(callback) {
+      this.on(CHANNEL_EVENTS.error, function (reason) {
+        return callback(reason);
+      });
+    }
+  }, {
+    key: "on",
+    value: function on(event, callback) {
+      this.bindings.push({ event: event, callback: callback });
+    }
+  }, {
+    key: "off",
+    value: function off(event) {
+      this.bindings = this.bindings.filter(function (bind) {
+        return bind.event !== event;
+      });
+    }
+  }, {
+    key: "canPush",
+    value: function canPush() {
+      return this.socket.isConnected() && this.isJoined();
+    }
+  }, {
+    key: "push",
+    value: function push(event, payload) {
+      var timeout = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : this.timeout;
+
+      if (!this.joinedOnce) {
+        throw "tried to push '" + event + "' to '" + this.topic + "' before joining. Use channel.join() before pushing events";
+      }
+      var pushEvent = new Push(this, event, 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 a `receive`
+     * hook to bind to the server ack, ie:
+     *
+     * ```javascript
+     *     channel.leave().receive("ok", () => alert("left!") )
+     * ```
+     */
+
+  }, {
+    key: "leave",
+    value: function leave() {
+      var _this3 = this;
+
+      var timeout = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : this.timeout;
+
+      this.state = CHANNEL_STATES.leaving;
+      var onClose = function onClose() {
+        _this3.socket.log("channel", "leave " + _this3.topic);
+        _this3.trigger(CHANNEL_EVENTS.close, "leave");
+      };
+      var leavePush = new Push(this, CHANNEL_EVENTS.leave, {}, timeout);
+      leavePush.receive("ok", function () {
+        return onClose();
+      }).receive("timeout", function () {
+        return 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
+     */
+
+  }, {
+    key: "onMessage",
+    value: function onMessage(event, payload, ref) {
+      return payload;
+    }
+
+    // private
+
+  }, {
+    key: "isMember",
+    value: function isMember(topic, event, payload, joinRef) {
+      if (this.topic !== topic) {
+        return false;
+      }
+      var isLifecycleEvent = CHANNEL_LIFECYCLE_EVENTS.indexOf(event) >= 0;
+
+      if (joinRef && isLifecycleEvent && joinRef !== this.joinRef()) {
+        this.socket.log("channel", "dropping outdated message", { topic: topic, event: event, payload: payload, joinRef: joinRef });
+        return false;
+      } else {
+        return true;
+      }
+    }
+  }, {
+    key: "joinRef",
+    value: function joinRef() {
+      return this.joinPush.ref;
+    }
+  }, {
+    key: "sendJoin",
+    value: function sendJoin(timeout) {
+      this.state = CHANNEL_STATES.joining;
+      this.joinPush.resend(timeout);
+    }
+  }, {
+    key: "rejoin",
+    value: function rejoin() {
+      var timeout = arguments.length > 0 && arguments[0] !== undefined ? arguments[0] : this.timeout;
+      if (this.isLeaving()) {
+        return;
+      }
+      this.sendJoin(timeout);
+    }
+  }, {
+    key: "trigger",
+    value: function trigger(event, payload, ref, joinRef) {
+      var _this4 = this;
+
+      var handledPayload = this.onMessage(event, payload, ref, joinRef);
+      if (payload && !handledPayload) {
+        throw "channel onMessage callbacks must return the payload, modified or unmodified";
+      }
+
+      this.bindings.filter(function (bind) {
+        return bind.event === event;
+      }).map(function (bind) {
+        return bind.callback(handledPayload, ref, joinRef || _this4.joinRef());
+      });
+    }
+  }, {
+    key: "replyEventName",
+    value: function replyEventName(ref) {
+      return "chan_reply_" + ref;
+    }
+  }, {
+    key: "isClosed",
+    value: function isClosed() {
+      return this.state === CHANNEL_STATES.closed;
+    }
+  }, {
+    key: "isErrored",
+    value: function isErrored() {
+      return this.state === CHANNEL_STATES.errored;
+    }
+  }, {
+    key: "isJoined",
+    value: function isJoined() {
+      return this.state === CHANNEL_STATES.joined;
+    }
+  }, {
+    key: "isJoining",
+    value: function isJoining() {
+      return this.state === CHANNEL_STATES.joining;
+    }
+  }, {
+    key: "isLeaving",
+    value: function isLeaving() {
+      return this.state === CHANNEL_STATES.leaving;
+    }
+  }]);
+
+  return Channel;
+}();
+
+var Serializer = {
+  encode: function encode(msg, callback) {
+    var payload = [msg.join_ref, msg.ref, msg.topic, msg.event, msg.payload];
+    return callback(JSON.stringify(payload));
+  },
+  decode: function decode(rawPayload, callback) {
+    var _JSON$parse = JSON.parse(rawPayload),
+        _JSON$parse2 = _slicedToArray(_JSON$parse, 5),
+        join_ref = _JSON$parse2[0],
+        ref = _JSON$parse2[1],
+        topic = _JSON$parse2[2],
+        event = _JSON$parse2[3],
+        payload = _JSON$parse2[4];
+
+    return callback({ join_ref: join_ref, ref: ref, topic: topic, event: event, payload: payload });
+  }
+};
+
+/** Initializes the Socket
+ *
+ *
+ * For IE8 support use an ES5-shim (https://github.com/es-shims/es5-shim)
+ *
+ * @param {string} endPoint - The string WebSocket endpoint, ie, `"ws://example.com/socket"`,
+ *                                               `"wss://example.com"`
+ *                                               `"/socket"` (inherited host & protocol)
+ * @param {Object} opts - Optional configuration
+ * @param {string} opts.transport - The Websocket Transport, for example WebSocket or Phoenix.LongPoll.
+ *
+ * Defaults to WebSocket with automatic LongPoll fallback.
+ * @param {Function} opts.encode - The function to encode outgoing messages.
+ *
+ * Defaults to JSON:
+ *
+ * ```javascript
+ * (payload, callback) => callback(JSON.stringify(payload))
+ * ```
+ *
+ * @param {Function} opts.decode - The function to decode incoming messages.
+ *
+ * Defaults to JSON:
+ *
+ * ```javascript
+ * (payload, callback) => callback(JSON.parse(payload))
+ * ```
+ *
+ * @param {number} opts.timeout - The default timeout in milliseconds to trigger push timeouts.
+ *
+ * Defaults `DEFAULT_TIMEOUT`
+ * @param {number} opts.heartbeatIntervalMs - The millisec interval to send a heartbeat message
+ * @param {number} opts.reconnectAfterMs - The optional function that returns the millsec reconnect interval.
+ *
+ * Defaults to stepped backoff of:
+ *
+ * ```javascript
+ *  function(tries){
+ *    return [1000, 5000, 10000][tries - 1] || 10000
+ *  }
+ * ```
+ * @param {Function} opts.logger - The optional function for specialized logging, ie:
+ * ```javascript
+ * logger: (kind, msg, data) => { console.log(`${kind}: ${msg}`, data) }
+ * ```
+ *
+ * @param {number}  opts.longpollerTimeout - The maximum timeout of a long poll AJAX request.
+ *
+ * Defaults to 20s (double the server long poll timer).
+ *
+ * @param {Object}  opts.params - The optional params to pass when connecting
+ *
+ *
+*/
+
+var Socket = exports.Socket = function () {
+  function Socket(endPoint) {
+    var _this5 = this;
+
+    var opts = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};
+
+    _classCallCheck(this, Socket);
+
+    this.stateChangeCallbacks = { open: [], close: [], error: [], message: [] };
+    this.channels = [];
+    this.sendBuffer = [];
+    this.ref = 0;
+    this.timeout = opts.timeout || DEFAULT_TIMEOUT;
+    this.transport = opts.transport || window.WebSocket || LongPoll;
+    this.defaultEncoder = Serializer.encode;
+    this.defaultDecoder = Serializer.decode;
+    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;
+    }
+    this.heartbeatIntervalMs = opts.heartbeatIntervalMs || 30000;
+    this.reconnectAfterMs = opts.reconnectAfterMs || function (tries) {
+      return [1000, 2000, 5000, 10000][tries - 1] || 10000;
+    };
+    this.logger = opts.logger || function () {}; // noop
+    this.longpollerTimeout = opts.longpollerTimeout || 20000;
+    this.params = opts.params || {};
+    this.endPoint = endPoint + "/" + TRANSPORTS.websocket;
+    this.heartbeatTimer = null;
+    this.pendingHeartbeatRef = null;
+    this.reconnectTimer = new Timer(function () {
+      _this5.disconnect(function () {
+        return _this5.connect();
+      });
+    }, this.reconnectAfterMs);
+  }
+
+  _createClass(Socket, [{
+    key: "protocol",
+    value: function protocol() {
+      return location.protocol.match(/^https/) ? "wss" : "ws";
+    }
+  }, {
+    key: "endPointURL",
+    value: function endPointURL() {
+      var uri = Ajax.appendParams(Ajax.appendParams(this.endPoint, this.params), { vsn: VSN });
+      if (uri.charAt(0) !== "/") {
+        return uri;
+      }
+      if (uri.charAt(1) === "/") {
+        return this.protocol() + ":" + uri;
+      }
+
+      return this.protocol() + "://" + location.host + uri;
+    }
+  }, {
+    key: "disconnect",
+    value: function disconnect(callback, code, reason) {
+      if (this.conn) {
+        this.conn.onclose = function () {}; // noop
+        if (code) {
+          this.conn.close(code, reason || "");
+        } else {
+          this.conn.close();
+        }
+        this.conn = null;
+      }
+      callback && callback();
+    }
+
+    /**
+     *
+     * @param {Object} params - The params to send when connecting, for example `{user_id: userToken}`
+     */
+
+  }, {
+    key: "connect",
+    value: function connect(params) {
+      var _this6 = this;
+
+      if (params) {
+        console && console.log("passing params to connect is deprecated. Instead pass :params to the Socket constructor");
+        this.params = params;
+      }
+      if (this.conn) {
+        return;
+      }
+
+      this.conn = new this.transport(this.endPointURL());
+      this.conn.timeout = this.longpollerTimeout;
+      this.conn.onopen = function () {
+        return _this6.onConnOpen();
+      };
+      this.conn.onerror = function (error) {
+        return _this6.onConnError(error);
+      };
+      this.conn.onmessage = function (event) {
+        return _this6.onConnMessage(event);
+      };
+      this.conn.onclose = function (event) {
+        return _this6.onConnClose(event);
+      };
+    }
+
+    /**
+     * Logs the message. Override `this.logger` for specialized logging. noops by default
+     * @param {string} kind
+     * @param {string} msg
+     * @param {Object} data
+     */
+
+  }, {
+    key: "log",
+    value: function log(kind, msg, data) {
+      this.logger(kind, msg, data);
+    }
+
+    // Registers callbacks for connection state change events
+    //
+    // Examples
+    //
+    //    socket.onError(function(error){ alert("An error occurred") })
+    //
+
+  }, {
+    key: "onOpen",
+    value: function onOpen(callback) {
+      this.stateChangeCallbacks.open.push(callback);
+    }
+  }, {
+    key: "onClose",
+    value: function onClose(callback) {
+      this.stateChangeCallbacks.close.push(callback);
+    }
+  }, {
+    key: "onError",
+    value: function onError(callback) {
+      this.stateChangeCallbacks.error.push(callback);
+    }
+  }, {
+    key: "onMessage",
+    value: function onMessage(callback) {
+      this.stateChangeCallbacks.message.push(callback);
+    }
+  }, {
+    key: "onConnOpen",
+    value: function onConnOpen() {
+      var _this7 = this;
+
+      this.log("transport", "connected to " + this.endPointURL());
+      this.flushSendBuffer();
+      this.reconnectTimer.reset();
+      if (!this.conn.skipHeartbeat) {
+        clearInterval(this.heartbeatTimer);
+        this.heartbeatTimer = setInterval(function () {
+          return _this7.sendHeartbeat();
+        }, this.heartbeatIntervalMs);
+      }
+      this.stateChangeCallbacks.open.forEach(function (callback) {
+        return callback();
+      });
+    }
+  }, {
+    key: "onConnClose",
+    value: function onConnClose(event) {
+      this.log("transport", "close", event);
+      this.triggerChanError();
+      clearInterval(this.heartbeatTimer);
+      this.reconnectTimer.scheduleTimeout();
+      this.stateChangeCallbacks.close.forEach(function (callback) {
+        return callback(event);
+      });
+    }
+  }, {
+    key: "onConnError",
+    value: function onConnError(error) {
+      this.log("transport", error);
+      this.triggerChanError();
+      this.stateChangeCallbacks.error.forEach(function (callback) {
+        return callback(error);
+      });
+    }
+  }, {
+    key: "triggerChanError",
+    value: function triggerChanError() {
+      this.channels.forEach(function (channel) {
+        return channel.trigger(CHANNEL_EVENTS.error);
+      });
+    }
+  }, {
+    key: "connectionState",
+    value: function 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";
+      }
+    }
+  }, {
+    key: "isConnected",
+    value: function isConnected() {
+      return this.connectionState() === "open";
+    }
+  }, {
+    key: "remove",
+    value: function remove(channel) {
+      this.channels = this.channels.filter(function (c) {
+        return c.joinRef() !== channel.joinRef();
+      });
+    }
+  }, {
+    key: "channel",
+    value: function channel(topic) {
+      var chanParams = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : {};
+
+      var chan = new Channel(topic, chanParams, this);
+      this.channels.push(chan);
+      return chan;
+    }
+  }, {
+    key: "push",
+    value: function push(data) {
+      var _this8 = this;
+
+      var topic = data.topic,
+          event = data.event,
+          payload = data.payload,
+          ref = data.ref,
+          join_ref = data.join_ref;
+
+      var callback = function callback() {
+        _this8.encode(data, function (result) {
+          _this8.conn.send(result);
+        });
+      };
+      this.log("push", topic + " " + event + " (" + join_ref + ", " + ref + ")", payload);
+      if (this.isConnected()) {
+        callback();
+      } else {
+        this.sendBuffer.push(callback);
+      }
+    }
+
+    /**
+     * Return the next message ref, accounting for overflows
+     */
+
+  }, {
+    key: "makeRef",
+    value: function makeRef() {
+      var newRef = this.ref + 1;
+      if (newRef === this.ref) {
+        this.ref = 0;
+      } else {
+        this.ref = newRef;
+      }
+
+      return this.ref.toString();
+    }
+  }, {
+    key: "sendHeartbeat",
+    value: function sendHeartbeat() {
+      if (!this.isConnected()) {
+        return;
+      }
+      if (this.pendingHeartbeatRef) {
+        this.pendingHeartbeatRef = null;
+        this.log("transport", "heartbeat timeout. Attempting to re-establish connection");
+        this.conn.close(WS_CLOSE_NORMAL, "hearbeat timeout");
+        return;
+      }
+      this.pendingHeartbeatRef = this.makeRef();
+      this.push({ topic: "phoenix", event: "heartbeat", payload: {}, ref: this.pendingHeartbeatRef });
+    }
+  }, {
+    key: "flushSendBuffer",
+    value: function flushSendBuffer() {
+      if (this.isConnected() && this.sendBuffer.length > 0) {
+        this.sendBuffer.forEach(function (callback) {
+          return callback();
+        });
+        this.sendBuffer = [];
+      }
+    }
+  }, {
+    key: "onConnMessage",
+    value: function onConnMessage(rawMessage) {
+      var _this9 = this;
+
+      this.decode(rawMessage.data, function (msg) {
+        var topic = msg.topic,
+            event = msg.event,
+            payload = msg.payload,
+            ref = msg.ref,
+            join_ref = msg.join_ref;
+
+        if (ref && ref === _this9.pendingHeartbeatRef) {
+          _this9.pendingHeartbeatRef = null;
+        }
+
+        _this9.log("receive", (payload.status || "") + " " + topic + " " + event + " " + (ref && "(" + ref + ")" || ""), payload);
+        _this9.channels.filter(function (channel) {
+          return channel.isMember(topic, event, payload, join_ref);
+        }).forEach(function (channel) {
+          return channel.trigger(event, payload, ref, join_ref);
+        });
+        _this9.stateChangeCallbacks.message.forEach(function (callback) {
+          return callback(msg);
+        });
+      });
+    }
+  }]);
+
+  return Socket;
+}();
+
+var LongPoll = exports.LongPoll = function () {
+  function LongPoll(endPoint) {
+    _classCallCheck(this, LongPoll);
+
+    this.endPoint = null;
+    this.token = null;
+    this.skipHeartbeat = true;
+    this.onopen = function () {}; // noop
+    this.onerror = function () {}; // noop
+    this.onmessage = function () {}; // noop
+    this.onclose = function () {}; // noop
+    this.pollEndpoint = this.normalizeEndpoint(endPoint);
+    this.readyState = SOCKET_STATES.connecting;
+
+    this.poll();
+  }
+
+  _createClass(LongPoll, [{
+    key: "normalizeEndpoint",
+    value: function normalizeEndpoint(endPoint) {
+      return endPoint.replace("ws://", "http://").replace("wss://", "https://").replace(new RegExp("(.*)\/" + TRANSPORTS.websocket), "$1/" + TRANSPORTS.longpoll);
+    }
+  }, {
+    key: "endpointURL",
+    value: function endpointURL() {
+      return Ajax.appendParams(this.pollEndpoint, { token: this.token });
+    }
+  }, {
+    key: "closeAndRetry",
+    value: function closeAndRetry() {
+      this.close();
+      this.readyState = SOCKET_STATES.connecting;
+    }
+  }, {
+    key: "ontimeout",
+    value: function ontimeout() {
+      this.onerror("timeout");
+      this.closeAndRetry();
+    }
+  }, {
+    key: "poll",
+    value: function poll() {
+      var _this10 = this;
+
+      if (!(this.readyState === SOCKET_STATES.open || this.readyState === SOCKET_STATES.connecting)) {
+        return;
+      }
+
+      Ajax.request("GET", this.endpointURL(), "application/json", null, this.timeout, this.ontimeout.bind(this), function (resp) {
+        if (resp) {
+          var status = resp.status,
+              token = resp.token,
+              messages = resp.messages;
+
+          _this10.token = token;
+        } else {
+          var status = 0;
+        }
+
+        switch (status) {
+          case 200:
+            messages.forEach(function (msg) {
+              return _this10.onmessage({ data: msg });
+            });
+            _this10.poll();
+            break;
+          case 204:
+            _this10.poll();
+            break;
+          case 410:
+            _this10.readyState = SOCKET_STATES.open;
+            _this10.onopen();
+            _this10.poll();
+            break;
+          case 0:
+          case 500:
+            _this10.onerror();
+            _this10.closeAndRetry();
+            break;
+          default:
+            throw "unhandled poll status " + status;
+        }
+      });
+    }
+  }, {
+    key: "send",
+    value: function send(body) {
+      var _this11 = this;
+
+      Ajax.request("POST", this.endpointURL(), "application/json", body, this.timeout, this.onerror.bind(this, "timeout"), function (resp) {
+        if (!resp || resp.status !== 200) {
+          _this11.onerror(resp && resp.status);
+          _this11.closeAndRetry();
+        }
+      });
+    }
+  }, {
+    key: "close",
+    value: function close(code, reason) {
+      this.readyState = SOCKET_STATES.closed;
+      this.onclose();
+    }
+  }]);
+
+  return LongPoll;
+}();
+
+var Ajax = exports.Ajax = function () {
+  function Ajax() {
+    _classCallCheck(this, Ajax);
+  }
+
+  _createClass(Ajax, null, [{
+    key: "request",
+    value: function request(method, endPoint, accept, body, timeout, ontimeout, callback) {
+      if (window.XDomainRequest) {
+        var req = new XDomainRequest(); // IE8, IE9
+        this.xdomainRequest(req, method, endPoint, body, timeout, ontimeout, callback);
+      } else {
+        var _req = window.XMLHttpRequest ? new window.XMLHttpRequest() : // IE7+, Firefox, Chrome, Opera, Safari
+        new ActiveXObject("Microsoft.XMLHTTP"); // IE6, IE5
+        this.xhrRequest(_req, method, endPoint, accept, body, timeout, ontimeout, callback);
+      }
+    }
+  }, {
+    key: "xdomainRequest",
+    value: function xdomainRequest(req, method, endPoint, body, timeout, ontimeout, callback) {
+      var _this12 = this;
+
+      req.timeout = timeout;
+      req.open(method, endPoint);
+      req.onload = function () {
+        var response = _this12.parseJSON(req.responseText);
+        callback && callback(response);
+      };
+      if (ontimeout) {
+        req.ontimeout = ontimeout;
+      }
+
+      // Work around bug in IE9 that requires an attached onprogress handler
+      req.onprogress = function () {};
+
+      req.send(body);
+    }
+  }, {
+    key: "xhrRequest",
+    value: function xhrRequest(req, method, endPoint, accept, body, timeout, ontimeout, callback) {
+      var _this13 = this;
+
+      req.open(method, endPoint, true);
+      req.timeout = timeout;
+      req.setRequestHeader("Content-Type", accept);
+      req.onerror = function () {
+        callback && callback(null);
+      };
+      req.onreadystatechange = function () {
+        if (req.readyState === _this13.states.complete && callback) {
+          var response = _this13.parseJSON(req.responseText);
+          callback(response);
+        }
+      };
+      if (ontimeout) {
+        req.ontimeout = ontimeout;
+      }
+
+      req.send(body);
+    }
+  }, {
+    key: "parseJSON",
+    value: function 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;
+      }
+    }
+  }, {
+    key: "serialize",
+    value: function serialize(obj, parentKey) {
+      var queryStr = [];
+      for (var key in obj) {
+        if (!obj.hasOwnProperty(key)) {
+          continue;
+        }
+        var paramKey = parentKey ? parentKey + "[" + key + "]" : key;
+        var paramVal = obj[key];
+        if ((typeof paramVal === "undefined" ? "undefined" : _typeof(paramVal)) === "object") {
+          queryStr.push(this.serialize(paramVal, paramKey));
+        } else {
+          queryStr.push(encodeURIComponent(paramKey) + "=" + encodeURIComponent(paramVal));
+        }
+      }
+      return queryStr.join("&");
+    }
+  }, {
+    key: "appendParams",
+    value: function appendParams(url, params) {
+      if (Object.keys(params).length === 0) {
+        return url;
+      }
+
+      var prefix = url.match(/\?/) ? "&" : "?";
+      return "" + url + prefix + this.serialize(params);
+    }
+  }]);
+
+  return Ajax;
+}();
+
+Ajax.states = { complete: 4 };
+
+var Presence = exports.Presence = {
+  syncState: function syncState(currentState, newState, onJoin, onLeave) {
+    var _this14 = this;
+
+    var state = this.clone(currentState);
+    var joins = {};
+    var leaves = {};
+
+    this.map(state, function (key, presence) {
+      if (!newState[key]) {
+        leaves[key] = presence;
+      }
+    });
+    this.map(newState, function (key, newPresence) {
+      var currentPresence = state[key];
+      if (currentPresence) {
+        var newRefs = newPresence.metas.map(function (m) {
+          return m.phx_ref;
+        });
+        var curRefs = currentPresence.metas.map(function (m) {
+          return m.phx_ref;
+        });
+        var joinedMetas = newPresence.metas.filter(function (m) {
+          return curRefs.indexOf(m.phx_ref) < 0;
+        });
+        var leftMetas = currentPresence.metas.filter(function (m) {
+          return newRefs.indexOf(m.phx_ref) < 0;
+        });
+        if (joinedMetas.length > 0) {
+          joins[key] = newPresence;
+          joins[key].metas = joinedMetas;
+        }
+        if (leftMetas.length > 0) {
+          leaves[key] = _this14.clone(currentPresence);
+          leaves[key].metas = leftMetas;
+        }
+      } else {
+        joins[key] = newPresence;
+      }
+    });
+    return this.syncDiff(state, { joins: joins, leaves: leaves }, onJoin, onLeave);
+  },
+  syncDiff: function syncDiff(currentState, _ref2, onJoin, onLeave) {
+    var joins = _ref2.joins,
+        leaves = _ref2.leaves;
+
+    var state = this.clone(currentState);
+    if (!onJoin) {
+      onJoin = function onJoin() {};
+    }
+    if (!onLeave) {
+      onLeave = function onLeave() {};
+    }
+
+    this.map(joins, function (key, newPresence) {
+      var currentPresence = state[key];
+      state[key] = newPresence;
+      if (currentPresence) {
+        var _state$key$metas;
+
+        (_state$key$metas = state[key].metas).unshift.apply(_state$key$metas, _toConsumableArray(currentPresence.metas));
+      }
+      onJoin(key, currentPresence, newPresence);
+    });
+    this.map(leaves, function (key, leftPresence) {
+      var currentPresence = state[key];
+      if (!currentPresence) {
+        return;
+      }
+      var refsToRemove = leftPresence.metas.map(function (m) {
+        return m.phx_ref;
+      });
+      currentPresence.metas = currentPresence.metas.filter(function (p) {
+        return refsToRemove.indexOf(p.phx_ref) < 0;
+      });
+      onLeave(key, currentPresence, leftPresence);
+      if (currentPresence.metas.length === 0) {
+        delete state[key];
+      }
+    });
+    return state;
+  },
+  list: function list(presences, chooser) {
+    if (!chooser) {
+      chooser = function chooser(key, pres) {
+        return pres;
+      };
+    }
+
+    return this.map(presences, function (key, presence) {
+      return chooser(key, presence);
+    });
+  },
+
+
+  // private
+
+  map: function map(obj, func) {
+    return Object.getOwnPropertyNames(obj).map(function (key) {
+      return func(key, obj[key]);
+    });
+  },
+  clone: function clone(obj) {
+    return JSON.parse(JSON.stringify(obj));
+  }
+};
+
+/**
+ *
+ * Creates a timer that accepts a `timerCalc` function to perform
+ * calculated timeout retries, such as exponential backoff.
+ *
+ * ## Examples
+ *
+ * ```javascript
+ *    let reconnectTimer = new Timer(() => this.connect(), function(tries){
+ *      return [1000, 5000, 10000][tries - 1] || 10000
+ *    })
+ *    reconnectTimer.scheduleTimeout() // fires after 1000
+ *    reconnectTimer.scheduleTimeout() // fires after 5000
+ *    reconnectTimer.reset()
+ *    reconnectTimer.scheduleTimeout() // fires after 1000
+ * ```
+ * @param {Function} callback
+ * @param {Function} timerCalc
+ */
+
+var Timer = function () {
+  function Timer(callback, timerCalc) {
+    _classCallCheck(this, Timer);
+
+    this.callback = callback;
+    this.timerCalc = timerCalc;
+    this.timer = null;
+    this.tries = 0;
+  }
+
+  _createClass(Timer, [{
+    key: "reset",
+    value: function reset() {
+      this.tries = 0;
+      clearTimeout(this.timer);
+    }
+
+    /**
+     * Cancels any previous scheduleTimeout and schedules callback
+     */
+
+  }, {
+    key: "scheduleTimeout",
+    value: function scheduleTimeout() {
+      var _this15 = this;
+
+      clearTimeout(this.timer);
+
+      this.timer = setTimeout(function () {
+        _this15.tries = _this15.tries + 1;
+        _this15.callback();
+      }, this.timerCalc(this.tries + 1));
+    }
+  }]);
+
+  return Timer;
+}();
+
+})));
diff --git a/priv/static/js/widget.js b/priv/static/js/widget.js
new file mode 100644
index 0000000..e69de29
--- /dev/null
+++ b/priv/static/js/widget.js