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Viewing file:     client.js (80.33 KB)      -rw-r--r--

var SubscriptionsTransportWs =
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Object.defineProperty(exports, "__esModule", { value: true });
exports.SubscriptionClient = void 0;
var _global = typeof global !== 'undefined' ? global : (typeof window !== 'undefined' ? window : {});
var NativeWebSocket = _global.WebSocket || _global.MozWebSocket;
var Backoff = __webpack_require__(3);
var eventemitter3_1 = __webpack_require__(4);
var is_string_1 = __webpack_require__(5);
var is_object_1 = __webpack_require__(6);
var printer_1 = __webpack_require__(7);
var getOperationAST_1 = __webpack_require__(14);
var symbol_observable_1 = __webpack_require__(16);
var protocol_1 = __webpack_require__(19);
var defaults_1 = __webpack_require__(20);
var message_types_1 = __webpack_require__(21);
var SubscriptionClient = (function () {
    function SubscriptionClient(url, options, webSocketImpl, webSocketProtocols) {
        var _a = (options || {}), _b = _a.connectionCallback, connectionCallback = _b === void 0 ? undefined : _b, _c = _a.connectionParams, connectionParams = _c === void 0 ? {} : _c, _d = _a.minTimeout, minTimeout = _d === void 0 ? defaults_1.MIN_WS_TIMEOUT : _d, _e = _a.timeout, timeout = _e === void 0 ? defaults_1.WS_TIMEOUT : _e, _f = _a.reconnect, reconnect = _f === void 0 ? false : _f, _g = _a.reconnectionAttempts, reconnectionAttempts = _g === void 0 ? Infinity : _g, _h = _a.lazy, lazy = _h === void 0 ? false : _h, _j = _a.inactivityTimeout, inactivityTimeout = _j === void 0 ? 0 : _j, _k = _a.wsOptionArguments, wsOptionArguments = _k === void 0 ? [] : _k;
        this.wsImpl = webSocketImpl || NativeWebSocket;
        if (!this.wsImpl) {
            throw new Error('Unable to find native implementation, or alternative implementation for WebSocket!');
        }
        this.wsProtocols = webSocketProtocols || protocol_1.GRAPHQL_WS;
        this.connectionCallback = connectionCallback;
        this.url = url;
        this.operations = {};
        this.nextOperationId = 0;
        this.minWsTimeout = minTimeout;
        this.wsTimeout = timeout;
        this.unsentMessagesQueue = [];
        this.reconnect = reconnect;
        this.reconnecting = false;
        this.reconnectionAttempts = reconnectionAttempts;
        this.lazy = !!lazy;
        this.inactivityTimeout = inactivityTimeout;
        this.closedByUser = false;
        this.backoff = new Backoff({ jitter: 0.5 });
        this.eventEmitter = new eventemitter3_1.EventEmitter();
        this.middlewares = [];
        this.client = null;
        this.maxConnectTimeGenerator = this.createMaxConnectTimeGenerator();
        this.connectionParams = this.getConnectionParams(connectionParams);
        this.wsOptionArguments = wsOptionArguments;
        if (!this.lazy) {
            this.connect();
        }
    }
    Object.defineProperty(SubscriptionClient.prototype, "status", {
        get: function () {
            if (this.client === null) {
                return this.wsImpl.CLOSED;
            }
            return this.client.readyState;
        },
        enumerable: false,
        configurable: true
    });
    SubscriptionClient.prototype.close = function (isForced, closedByUser) {
        if (isForced === void 0) { isForced = true; }
        if (closedByUser === void 0) { closedByUser = true; }
        this.clearInactivityTimeout();
        if (this.client !== null) {
            this.closedByUser = closedByUser;
            if (isForced) {
                this.clearCheckConnectionInterval();
                this.clearMaxConnectTimeout();
                this.clearTryReconnectTimeout();
                this.unsubscribeAll();
                this.sendMessage(undefined, message_types_1.default.GQL_CONNECTION_TERMINATE, null);
            }
            this.client.close();
            this.client.onopen = null;
            this.client.onclose = null;
            this.client.onerror = null;
            this.client.onmessage = null;
            this.client = null;
            this.eventEmitter.emit('disconnected');
            if (!isForced) {
                this.tryReconnect();
            }
        }
    };
    SubscriptionClient.prototype.request = function (request) {
        var _a;
        var getObserver = this.getObserver.bind(this);
        var executeOperation = this.executeOperation.bind(this);
        var unsubscribe = this.unsubscribe.bind(this);
        var opId;
        this.clearInactivityTimeout();
        return _a = {},
            _a[symbol_observable_1.default] = function () {
                return this;
            },
            _a.subscribe = function (observerOrNext, onError, onComplete) {
                var observer = getObserver(observerOrNext, onError, onComplete);
                opId = executeOperation(request, function (error, result) {
                    if (error === null && result === null) {
                        if (observer.complete) {
                            observer.complete();
                        }
                    }
                    else if (error) {
                        if (observer.error) {
                            observer.error(error[0]);
                        }
                    }
                    else {
                        if (observer.next) {
                            observer.next(result);
                        }
                    }
                });
                return {
                    unsubscribe: function () {
                        if (opId) {
                            unsubscribe(opId);
                            opId = null;
                        }
                    },
                };
            },
            _a;
    };
    SubscriptionClient.prototype.on = function (eventName, callback, context) {
        var handler = this.eventEmitter.on(eventName, callback, context);
        return function () {
            handler.off(eventName, callback, context);
        };
    };
    SubscriptionClient.prototype.onConnected = function (callback, context) {
        return this.on('connected', callback, context);
    };
    SubscriptionClient.prototype.onConnecting = function (callback, context) {
        return this.on('connecting', callback, context);
    };
    SubscriptionClient.prototype.onDisconnected = function (callback, context) {
        return this.on('disconnected', callback, context);
    };
    SubscriptionClient.prototype.onReconnected = function (callback, context) {
        return this.on('reconnected', callback, context);
    };
    SubscriptionClient.prototype.onReconnecting = function (callback, context) {
        return this.on('reconnecting', callback, context);
    };
    SubscriptionClient.prototype.onError = function (callback, context) {
        return this.on('error', callback, context);
    };
    SubscriptionClient.prototype.unsubscribeAll = function () {
        var _this = this;
        Object.keys(this.operations).forEach(function (subId) {
            _this.unsubscribe(subId);
        });
    };
    SubscriptionClient.prototype.applyMiddlewares = function (options) {
        var _this = this;
        return new Promise(function (resolve, reject) {
            var queue = function (funcs, scope) {
                var next = function (error) {
                    if (error) {
                        reject(error);
                    }
                    else {
                        if (funcs.length > 0) {
                            var f = funcs.shift();
                            if (f) {
                                f.applyMiddleware.apply(scope, [options, next]);
                            }
                        }
                        else {
                            resolve(options);
                        }
                    }
                };
                next();
            };
            queue(__spreadArrays(_this.middlewares), _this);
        });
    };
    SubscriptionClient.prototype.use = function (middlewares) {
        var _this = this;
        middlewares.map(function (middleware) {
            if (typeof middleware.applyMiddleware === 'function') {
                _this.middlewares.push(middleware);
            }
            else {
                throw new Error('Middleware must implement the applyMiddleware function.');
            }
        });
        return this;
    };
    SubscriptionClient.prototype.getConnectionParams = function (connectionParams) {
        return function () { return new Promise(function (resolve, reject) {
            if (typeof connectionParams === 'function') {
                try {
                    return resolve(connectionParams.call(null));
                }
                catch (error) {
                    return reject(error);
                }
            }
            resolve(connectionParams);
        }); };
    };
    SubscriptionClient.prototype.executeOperation = function (options, handler) {
        var _this = this;
        if (this.client === null) {
            this.connect();
        }
        var opId = this.generateOperationId();
        this.operations[opId] = { options: options, handler: handler };
        this.applyMiddlewares(options)
            .then(function (processedOptions) {
            _this.checkOperationOptions(processedOptions, handler);
            if (_this.operations[opId]) {
                _this.operations[opId] = { options: processedOptions, handler: handler };
                _this.sendMessage(opId, message_types_1.default.GQL_START, processedOptions);
            }
        })
            .catch(function (error) {
            _this.unsubscribe(opId);
            handler(_this.formatErrors(error));
        });
        return opId;
    };
    SubscriptionClient.prototype.getObserver = function (observerOrNext, error, complete) {
        if (typeof observerOrNext === 'function') {
            return {
                next: function (v) { return observerOrNext(v); },
                error: function (e) { return error && error(e); },
                complete: function () { return complete && complete(); },
            };
        }
        return observerOrNext;
    };
    SubscriptionClient.prototype.createMaxConnectTimeGenerator = function () {
        var minValue = this.minWsTimeout;
        var maxValue = this.wsTimeout;
        return new Backoff({
            min: minValue,
            max: maxValue,
            factor: 1.2,
        });
    };
    SubscriptionClient.prototype.clearCheckConnectionInterval = function () {
        if (this.checkConnectionIntervalId) {
            clearInterval(this.checkConnectionIntervalId);
            this.checkConnectionIntervalId = null;
        }
    };
    SubscriptionClient.prototype.clearMaxConnectTimeout = function () {
        if (this.maxConnectTimeoutId) {
            clearTimeout(this.maxConnectTimeoutId);
            this.maxConnectTimeoutId = null;
        }
    };
    SubscriptionClient.prototype.clearTryReconnectTimeout = function () {
        if (this.tryReconnectTimeoutId) {
            clearTimeout(this.tryReconnectTimeoutId);
            this.tryReconnectTimeoutId = null;
        }
    };
    SubscriptionClient.prototype.clearInactivityTimeout = function () {
        if (this.inactivityTimeoutId) {
            clearTimeout(this.inactivityTimeoutId);
            this.inactivityTimeoutId = null;
        }
    };
    SubscriptionClient.prototype.setInactivityTimeout = function () {
        var _this = this;
        if (this.inactivityTimeout > 0 && Object.keys(this.operations).length === 0) {
            this.inactivityTimeoutId = setTimeout(function () {
                if (Object.keys(_this.operations).length === 0) {
                    _this.close();
                }
            }, this.inactivityTimeout);
        }
    };
    SubscriptionClient.prototype.checkOperationOptions = function (options, handler) {
        var query = options.query, variables = options.variables, operationName = options.operationName;
        if (!query) {
            throw new Error('Must provide a query.');
        }
        if (!handler) {
            throw new Error('Must provide an handler.');
        }
        if ((!is_string_1.default(query) && !getOperationAST_1.getOperationAST(query, operationName)) ||
            (operationName && !is_string_1.default(operationName)) ||
            (variables && !is_object_1.default(variables))) {
            throw new Error('Incorrect option types. query must be a string or a document,' +
                '`operationName` must be a string, and `variables` must be an object.');
        }
    };
    SubscriptionClient.prototype.buildMessage = function (id, type, payload) {
        var payloadToReturn = payload && payload.query ? __assign(__assign({}, payload), { query: typeof payload.query === 'string' ? payload.query : printer_1.print(payload.query) }) :
            payload;
        return {
            id: id,
            type: type,
            payload: payloadToReturn,
        };
    };
    SubscriptionClient.prototype.formatErrors = function (errors) {
        if (Array.isArray(errors)) {
            return errors;
        }
        if (errors && errors.errors) {
            return this.formatErrors(errors.errors);
        }
        if (errors && errors.message) {
            return [errors];
        }
        return [{
                name: 'FormatedError',
                message: 'Unknown error',
                originalError: errors,
            }];
    };
    SubscriptionClient.prototype.sendMessage = function (id, type, payload) {
        this.sendMessageRaw(this.buildMessage(id, type, payload));
    };
    SubscriptionClient.prototype.sendMessageRaw = function (message) {
        switch (this.status) {
            case this.wsImpl.OPEN:
                var serializedMessage = JSON.stringify(message);
                try {
                    JSON.parse(serializedMessage);
                }
                catch (e) {
                    this.eventEmitter.emit('error', new Error("Message must be JSON-serializable. Got: " + message));
                }
                this.client.send(serializedMessage);
                break;
            case this.wsImpl.CONNECTING:
                this.unsentMessagesQueue.push(message);
                break;
            default:
                if (!this.reconnecting) {
                    this.eventEmitter.emit('error', new Error('A message was not sent because socket is not connected, is closing or ' +
                        'is already closed. Message was: ' + JSON.stringify(message)));
                }
        }
    };
    SubscriptionClient.prototype.generateOperationId = function () {
        return String(++this.nextOperationId);
    };
    SubscriptionClient.prototype.tryReconnect = function () {
        var _this = this;
        if (!this.reconnect || this.backoff.attempts >= this.reconnectionAttempts) {
            return;
        }
        if (!this.reconnecting) {
            Object.keys(this.operations).forEach(function (key) {
                _this.unsentMessagesQueue.push(_this.buildMessage(key, message_types_1.default.GQL_START, _this.operations[key].options));
            });
            this.reconnecting = true;
        }
        this.clearTryReconnectTimeout();
        var delay = this.backoff.duration();
        this.tryReconnectTimeoutId = setTimeout(function () {
            _this.connect();
        }, delay);
    };
    SubscriptionClient.prototype.flushUnsentMessagesQueue = function () {
        var _this = this;
        this.unsentMessagesQueue.forEach(function (message) {
            _this.sendMessageRaw(message);
        });
        this.unsentMessagesQueue = [];
    };
    SubscriptionClient.prototype.checkConnection = function () {
        if (this.wasKeepAliveReceived) {
            this.wasKeepAliveReceived = false;
            return;
        }
        if (!this.reconnecting) {
            this.close(false, true);
        }
    };
    SubscriptionClient.prototype.checkMaxConnectTimeout = function () {
        var _this = this;
        this.clearMaxConnectTimeout();
        this.maxConnectTimeoutId = setTimeout(function () {
            if (_this.status !== _this.wsImpl.OPEN) {
                _this.reconnecting = true;
                _this.close(false, true);
            }
        }, this.maxConnectTimeGenerator.duration());
    };
    SubscriptionClient.prototype.connect = function () {
        var _a;
        var _this = this;
        this.client = new ((_a = this.wsImpl).bind.apply(_a, __spreadArrays([void 0, this.url, this.wsProtocols], this.wsOptionArguments)))();
        this.checkMaxConnectTimeout();
        this.client.onopen = function () { return __awaiter(_this, void 0, void 0, function () {
            var connectionParams, error_1;
            return __generator(this, function (_a) {
                switch (_a.label) {
                    case 0:
                        if (!(this.status === this.wsImpl.OPEN)) return [3, 4];
                        this.clearMaxConnectTimeout();
                        this.closedByUser = false;
                        this.eventEmitter.emit(this.reconnecting ? 'reconnecting' : 'connecting');
                        _a.label = 1;
                    case 1:
                        _a.trys.push([1, 3, , 4]);
                        return [4, this.connectionParams()];
                    case 2:
                        connectionParams = _a.sent();
                        this.sendMessage(undefined, message_types_1.default.GQL_CONNECTION_INIT, connectionParams);
                        this.flushUnsentMessagesQueue();
                        return [3, 4];
                    case 3:
                        error_1 = _a.sent();
                        this.sendMessage(undefined, message_types_1.default.GQL_CONNECTION_ERROR, error_1);
                        this.flushUnsentMessagesQueue();
                        return [3, 4];
                    case 4: return [2];
                }
            });
        }); };
        this.client.onclose = function () {
            if (!_this.closedByUser) {
                _this.close(false, false);
            }
        };
        this.client.onerror = function (err) {
            _this.eventEmitter.emit('error', err);
        };
        this.client.onmessage = function (_a) {
            var data = _a.data;
            _this.processReceivedData(data);
        };
    };
    SubscriptionClient.prototype.processReceivedData = function (receivedData) {
        var parsedMessage;
        var opId;
        try {
            parsedMessage = JSON.parse(receivedData);
            opId = parsedMessage.id;
        }
        catch (e) {
            throw new Error("Message must be JSON-parseable. Got: " + receivedData);
        }
        if ([message_types_1.default.GQL_DATA,
            message_types_1.default.GQL_COMPLETE,
            message_types_1.default.GQL_ERROR,
        ].indexOf(parsedMessage.type) !== -1 && !this.operations[opId]) {
            this.unsubscribe(opId);
            return;
        }
        switch (parsedMessage.type) {
            case message_types_1.default.GQL_CONNECTION_ERROR:
                if (this.connectionCallback) {
                    this.connectionCallback(parsedMessage.payload);
                }
                break;
            case message_types_1.default.GQL_CONNECTION_ACK:
                this.eventEmitter.emit(this.reconnecting ? 'reconnected' : 'connected', parsedMessage.payload);
                this.reconnecting = false;
                this.backoff.reset();
                this.maxConnectTimeGenerator.reset();
                if (this.connectionCallback) {
                    this.connectionCallback();
                }
                break;
            case message_types_1.default.GQL_COMPLETE:
                var handler = this.operations[opId].handler;
                delete this.operations[opId];
                handler.call(this, null, null);
                break;
            case message_types_1.default.GQL_ERROR:
                this.operations[opId].handler(this.formatErrors(parsedMessage.payload), null);
                delete this.operations[opId];
                break;
            case message_types_1.default.GQL_DATA:
                var parsedPayload = !parsedMessage.payload.errors ?
                    parsedMessage.payload : __assign(__assign({}, parsedMessage.payload), { errors: this.formatErrors(parsedMessage.payload.errors) });
                this.operations[opId].handler(null, parsedPayload);
                break;
            case message_types_1.default.GQL_CONNECTION_KEEP_ALIVE:
                var firstKA = typeof this.wasKeepAliveReceived === 'undefined';
                this.wasKeepAliveReceived = true;
                if (firstKA) {
                    this.checkConnection();
                }
                if (this.checkConnectionIntervalId) {
                    clearInterval(this.checkConnectionIntervalId);
                    this.checkConnection();
                }
                this.checkConnectionIntervalId = setInterval(this.checkConnection.bind(this), this.wsTimeout);
                break;
            default:
                throw new Error('Invalid message type!');
        }
    };
    SubscriptionClient.prototype.unsubscribe = function (opId) {
        if (this.operations[opId]) {
            delete this.operations[opId];
            this.setInactivityTimeout();
            this.sendMessage(opId, message_types_1.default.GQL_STOP, undefined);
        }
    };
    return SubscriptionClient;
}());
exports.SubscriptionClient = SubscriptionClient;
//# sourceMappingURL=client.js.map
/* WEBPACK VAR INJECTION */}.call(exports, __webpack_require__(0)))

/***/ }),
/* 3 */
/***/ (function(module, exports) {


/**
 * Expose `Backoff`.
 */

module.exports = Backoff;

/**
 * Initialize backoff timer with `opts`.
 *
 * - `min` initial timeout in milliseconds [100]
 * - `max` max timeout [10000]
 * - `jitter` [0]
 * - `factor` [2]
 *
 * @param {Object} opts
 * @api public
 */

function Backoff(opts) {
  opts = opts || {};
  this.ms = opts.min || 100;
  this.max = opts.max || 10000;
  this.factor = opts.factor || 2;
  this.jitter = opts.jitter > 0 && opts.jitter <= 1 ? opts.jitter : 0;
  this.attempts = 0;
}

/**
 * Return the backoff duration.
 *
 * @return {Number}
 * @api public
 */

Backoff.prototype.duration = function(){
  var ms = this.ms * Math.pow(this.factor, this.attempts++);
  if (this.jitter) {
    var rand =  Math.random();
    var deviation = Math.floor(rand * this.jitter * ms);
    ms = (Math.floor(rand * 10) & 1) == 0  ? ms - deviation : ms + deviation;
  }
  return Math.min(ms, this.max) | 0;
};

/**
 * Reset the number of attempts.
 *
 * @api public
 */

Backoff.prototype.reset = function(){
  this.attempts = 0;
};

/**
 * Set the minimum duration
 *
 * @api public
 */

Backoff.prototype.setMin = function(min){
  this.ms = min;
};

/**
 * Set the maximum duration
 *
 * @api public
 */

Backoff.prototype.setMax = function(max){
  this.max = max;
};

/**
 * Set the jitter
 *
 * @api public
 */

Backoff.prototype.setJitter = function(jitter){
  this.jitter = jitter;
};



/***/ }),
/* 4 */
/***/ (function(module, exports, __webpack_require__) {

"use strict";


var has = Object.prototype.hasOwnProperty
  , prefix = '~';

/**
 * Constructor to create a storage for our `EE` objects.
 * An `Events` instance is a plain object whose properties are event names.
 *
 * @constructor
 * @private
 */
function Events() {}

//
// We try to not inherit from `Object.prototype`. In some engines creating an
// instance in this way is faster than calling `Object.create(null)` directly.
// If `Object.create(null)` is not supported we prefix the event names with a
// character to make sure that the built-in object properties are not
// overridden or used as an attack vector.
//
if (Object.create) {
  Events.prototype = Object.create(null);

  //
  // This hack is needed because the `__proto__` property is still inherited in
  // some old browsers like Android 4, iPhone 5.1, Opera 11 and Safari 5.
  //
  if (!new Events().__proto__) prefix = false;
}

/**
 * Representation of a single event listener.
 *
 * @param {Function} fn The listener function.
 * @param {*} context The context to invoke the listener with.
 * @param {Boolean} [once=false] Specify if the listener is a one-time listener.
 * @constructor
 * @private
 */
function EE(fn, context, once) {
  this.fn = fn;
  this.context = context;
  this.once = once || false;
}

/**
 * Add a listener for a given event.
 *
 * @param {EventEmitter} emitter Reference to the `EventEmitter` instance.
 * @param {(String|Symbol)} event The event name.
 * @param {Function} fn The listener function.
 * @param {*} context The context to invoke the listener with.
 * @param {Boolean} once Specify if the listener is a one-time listener.
 * @returns {EventEmitter}
 * @private
 */
function addListener(emitter, event, fn, context, once) {
  if (typeof fn !== 'function') {
    throw new TypeError('The listener must be a function');
  }

  var listener = new EE(fn, context || emitter, once)
    , evt = prefix ? prefix + event : event;

  if (!emitter._events[evt]) emitter._events[evt] = listener, emitter._eventsCount++;
  else if (!emitter._events[evt].fn) emitter._events[evt].push(listener);
  else emitter._events[evt] = [emitter._events[evt], listener];

  return emitter;
}

/**
 * Clear event by name.
 *
 * @param {EventEmitter} emitter Reference to the `EventEmitter` instance.
 * @param {(String|Symbol)} evt The Event name.
 * @private
 */
function clearEvent(emitter, evt) {
  if (--emitter._eventsCount === 0) emitter._events = new Events();
  else delete emitter._events[evt];
}

/**
 * Minimal `EventEmitter` interface that is molded against the Node.js
 * `EventEmitter` interface.
 *
 * @constructor
 * @public
 */
function EventEmitter() {
  this._events = new Events();
  this._eventsCount = 0;
}

/**
 * Return an array listing the events for which the emitter has registered
 * listeners.
 *
 * @returns {Array}
 * @public
 */
EventEmitter.prototype.eventNames = function eventNames() {
  var names = []
    , events
    , name;

  if (this._eventsCount === 0) return names;

  for (name in (events = this._events)) {
    if (has.call(events, name)) names.push(prefix ? name.slice(1) : name);
  }

  if (Object.getOwnPropertySymbols) {
    return names.concat(Object.getOwnPropertySymbols(events));
  }

  return names;
};

/**
 * Return the listeners registered for a given event.
 *
 * @param {(String|Symbol)} event The event name.
 * @returns {Array} The registered listeners.
 * @public
 */
EventEmitter.prototype.listeners = function listeners(event) {
  var evt = prefix ? prefix + event : event
    , handlers = this._events[evt];

  if (!handlers) return [];
  if (handlers.fn) return [handlers.fn];

  for (var i = 0, l = handlers.length, ee = new Array(l); i < l; i++) {
    ee[i] = handlers[i].fn;
  }

  return ee;
};

/**
 * Return the number of listeners listening to a given event.
 *
 * @param {(String|Symbol)} event The event name.
 * @returns {Number} The number of listeners.
 * @public
 */
EventEmitter.prototype.listenerCount = function listenerCount(event) {
  var evt = prefix ? prefix + event : event
    , listeners = this._events[evt];

  if (!listeners) return 0;
  if (listeners.fn) return 1;
  return listeners.length;
};

/**
 * Calls each of the listeners registered for a given event.
 *
 * @param {(String|Symbol)} event The event name.
 * @returns {Boolean} `true` if the event had listeners, else `false`.
 * @public
 */
EventEmitter.prototype.emit = function emit(event, a1, a2, a3, a4, a5) {
  var evt = prefix ? prefix + event : event;

  if (!this._events[evt]) return false;

  var listeners = this._events[evt]
    , len = arguments.length
    , args
    , i;

  if (listeners.fn) {
    if (listeners.once) this.removeListener(event, listeners.fn, undefined, true);

    switch (len) {
      case 1: return listeners.fn.call(listeners.context), true;
      case 2: return listeners.fn.call(listeners.context, a1), true;
      case 3: return listeners.fn.call(listeners.context, a1, a2), true;
      case 4: return listeners.fn.call(listeners.context, a1, a2, a3), true;
      case 5: return listeners.fn.call(listeners.context, a1, a2, a3, a4), true;
      case 6: return listeners.fn.call(listeners.context, a1, a2, a3, a4, a5), true;
    }

    for (i = 1, args = new Array(len -1); i < len; i++) {
      args[i - 1] = arguments[i];
    }

    listeners.fn.apply(listeners.context, args);
  } else {
    var length = listeners.length
      , j;

    for (i = 0; i < length; i++) {
      if (listeners[i].once) this.removeListener(event, listeners[i].fn, undefined, true);

      switch (len) {
        case 1: listeners[i].fn.call(listeners[i].context); break;
        case 2: listeners[i].fn.call(listeners[i].context, a1); break;
        case 3: listeners[i].fn.call(listeners[i].context, a1, a2); break;
        case 4: listeners[i].fn.call(listeners[i].context, a1, a2, a3); break;
        default:
          if (!args) for (j = 1, args = new Array(len -1); j < len; j++) {
            args[j - 1] = arguments[j];
          }

          listeners[i].fn.apply(listeners[i].context, args);
      }
    }
  }

  return true;
};

/**
 * Add a listener for a given event.
 *
 * @param {(String|Symbol)} event The event name.
 * @param {Function} fn The listener function.
 * @param {*} [context=this] The context to invoke the listener with.
 * @returns {EventEmitter} `this`.
 * @public
 */
EventEmitter.prototype.on = function on(event, fn, context) {
  return addListener(this, event, fn, context, false);
};

/**
 * Add a one-time listener for a given event.
 *
 * @param {(String|Symbol)} event The event name.
 * @param {Function} fn The listener function.
 * @param {*} [context=this] The context to invoke the listener with.
 * @returns {EventEmitter} `this`.
 * @public
 */
EventEmitter.prototype.once = function once(event, fn, context) {
  return addListener(this, event, fn, context, true);
};

/**
 * Remove the listeners of a given event.
 *
 * @param {(String|Symbol)} event The event name.
 * @param {Function} fn Only remove the listeners that match this function.
 * @param {*} context Only remove the listeners that have this context.
 * @param {Boolean} once Only remove one-time listeners.
 * @returns {EventEmitter} `this`.
 * @public
 */
EventEmitter.prototype.removeListener = function removeListener(event, fn, context, once) {
  var evt = prefix ? prefix + event : event;

  if (!this._events[evt]) return this;
  if (!fn) {
    clearEvent(this, evt);
    return this;
  }

  var listeners = this._events[evt];

  if (listeners.fn) {
    if (
      listeners.fn === fn &&
      (!once || listeners.once) &&
      (!context || listeners.context === context)
    ) {
      clearEvent(this, evt);
    }
  } else {
    for (var i = 0, events = [], length = listeners.length; i < length; i++) {
      if (
        listeners[i].fn !== fn ||
        (once && !listeners[i].once) ||
        (context && listeners[i].context !== context)
      ) {
        events.push(listeners[i]);
      }
    }

    //
    // Reset the array, or remove it completely if we have no more listeners.
    //
    if (events.length) this._events[evt] = events.length === 1 ? events[0] : events;
    else clearEvent(this, evt);
  }

  return this;
};

/**
 * Remove all listeners, or those of the specified event.
 *
 * @param {(String|Symbol)} [event] The event name.
 * @returns {EventEmitter} `this`.
 * @public
 */
EventEmitter.prototype.removeAllListeners = function removeAllListeners(event) {
  var evt;

  if (event) {
    evt = prefix ? prefix + event : event;
    if (this._events[evt]) clearEvent(this, evt);
  } else {
    this._events = new Events();
    this._eventsCount = 0;
  }

  return this;
};

//
// Alias methods names because people roll like that.
//
EventEmitter.prototype.off = EventEmitter.prototype.removeListener;
EventEmitter.prototype.addListener = EventEmitter.prototype.on;

//
// Expose the prefix.
//
EventEmitter.prefixed = prefix;

//
// Allow `EventEmitter` to be imported as module namespace.
//
EventEmitter.EventEmitter = EventEmitter;

//
// Expose the module.
//
if (true) {
  module.exports = EventEmitter;
}


/***/ }),
/* 5 */
/***/ (function(module, exports, __webpack_require__) {

"use strict";

Object.defineProperty(exports, "__esModule", { value: true });
function isString(value) {
    return typeof value === 'string';
}
exports.default = isString;
//# sourceMappingURL=is-string.js.map

/***/ }),
/* 6 */
/***/ (function(module, exports, __webpack_require__) {

"use strict";

Object.defineProperty(exports, "__esModule", { value: true });
function isObject(value) {
    return ((value !== null) && (typeof value === 'object'));
}
exports.default = isObject;
//# sourceMappingURL=is-object.js.map

/***/ }),
/* 7 */
/***/ (function(module, exports, __webpack_require__) {

"use strict";


Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.print = print;

var _visitor = __webpack_require__(8);

var _blockString = __webpack_require__(13);

/**
 * Converts an AST into a string, using one set of reasonable
 * formatting rules.
 */
function print(ast) {
  return (0, _visitor.visit)(ast, {
    leave: printDocASTReducer
  });
}

var MAX_LINE_LENGTH = 80; // TODO: provide better type coverage in future

var printDocASTReducer = {
  Name: function Name(node) {
    return node.value;
  },
  Variable: function Variable(node) {
    return '$' + node.name;
  },
  // Document
  Document: function Document(node) {
    return join(node.definitions, '\n\n') + '\n';
  },
  OperationDefinition: function OperationDefinition(node) {
    var op = node.operation;
    var name = node.name;
    var varDefs = wrap('(', join(node.variableDefinitions, ', '), ')');
    var directives = join(node.directives, ' ');
    var selectionSet = node.selectionSet; // Anonymous queries with no directives or variable definitions can use
    // the query short form.

    return !name && !directives && !varDefs && op === 'query' ? selectionSet : join([op, join([name, varDefs]), directives, selectionSet], ' ');
  },
  VariableDefinition: function VariableDefinition(_ref) {
    var variable = _ref.variable,
        type = _ref.type,
        defaultValue = _ref.defaultValue,
        directives = _ref.directives;
    return variable + ': ' + type + wrap(' = ', defaultValue) + wrap(' ', join(directives, ' '));
  },
  SelectionSet: function SelectionSet(_ref2) {
    var selections = _ref2.selections;
    return block(selections);
  },
  Field: function Field(_ref3) {
    var alias = _ref3.alias,
        name = _ref3.name,
        args = _ref3.arguments,
        directives = _ref3.directives,
        selectionSet = _ref3.selectionSet;
    var prefix = wrap('', alias, ': ') + name;
    var argsLine = prefix + wrap('(', join(args, ', '), ')');

    if (argsLine.length > MAX_LINE_LENGTH) {
      argsLine = prefix + wrap('(\n', indent(join(args, '\n')), '\n)');
    }

    return join([argsLine, join(directives, ' '), selectionSet], ' ');
  },
  Argument: function Argument(_ref4) {
    var name = _ref4.name,
        value = _ref4.value;
    return name + ': ' + value;
  },
  // Fragments
  FragmentSpread: function FragmentSpread(_ref5) {
    var name = _ref5.name,
        directives = _ref5.directives;
    return '...' + name + wrap(' ', join(directives, ' '));
  },
  InlineFragment: function InlineFragment(_ref6) {
    var typeCondition = _ref6.typeCondition,
        directives = _ref6.directives,
        selectionSet = _ref6.selectionSet;
    return join(['...', wrap('on ', typeCondition), join(directives, ' '), selectionSet], ' ');
  },
  FragmentDefinition: function FragmentDefinition(_ref7) {
    var name = _ref7.name,
        typeCondition = _ref7.typeCondition,
        variableDefinitions = _ref7.variableDefinitions,
        directives = _ref7.directives,
        selectionSet = _ref7.selectionSet;
    return (// Note: fragment variable definitions are experimental and may be changed
      // or removed in the future.
      "fragment ".concat(name).concat(wrap('(', join(variableDefinitions, ', '), ')'), " ") + "on ".concat(typeCondition, " ").concat(wrap('', join(directives, ' '), ' ')) + selectionSet
    );
  },
  // Value
  IntValue: function IntValue(_ref8) {
    var value = _ref8.value;
    return value;
  },
  FloatValue: function FloatValue(_ref9) {
    var value = _ref9.value;
    return value;
  },
  StringValue: function StringValue(_ref10, key) {
    var value = _ref10.value,
        isBlockString = _ref10.block;
    return isBlockString ? (0, _blockString.printBlockString)(value, key === 'description' ? '' : '  ') : JSON.stringify(value);
  },
  BooleanValue: function BooleanValue(_ref11) {
    var value = _ref11.value;
    return value ? 'true' : 'false';
  },
  NullValue: function NullValue() {
    return 'null';
  },
  EnumValue: function EnumValue(_ref12) {
    var value = _ref12.value;
    return value;
  },
  ListValue: function ListValue(_ref13) {
    var values = _ref13.values;
    return '[' + join(values, ', ') + ']';
  },
  ObjectValue: function ObjectValue(_ref14) {
    var fields = _ref14.fields;
    return '{' + join(fields, ', ') + '}';
  },
  ObjectField: function ObjectField(_ref15) {
    var name = _ref15.name,
        value = _ref15.value;
    return name + ': ' + value;
  },
  // Directive
  Directive: function Directive(_ref16) {
    var name = _ref16.name,
        args = _ref16.arguments;
    return '@' + name + wrap('(', join(args, ', '), ')');
  },
  // Type
  NamedType: function NamedType(_ref17) {
    var name = _ref17.name;
    return name;
  },
  ListType: function ListType(_ref18) {
    var type = _ref18.type;
    return '[' + type + ']';
  },
  NonNullType: function NonNullType(_ref19) {
    var type = _ref19.type;
    return type + '!';
  },
  // Type System Definitions
  SchemaDefinition: addDescription(function (_ref20) {
    var directives = _ref20.directives,
        operationTypes = _ref20.operationTypes;
    return join(['schema', join(directives, ' '), block(operationTypes)], ' ');
  }),
  OperationTypeDefinition: function OperationTypeDefinition(_ref21) {
    var operation = _ref21.operation,
        type = _ref21.type;
    return operation + ': ' + type;
  },
  ScalarTypeDefinition: addDescription(function (_ref22) {
    var name = _ref22.name,
        directives = _ref22.directives;
    return join(['scalar', name, join(directives, ' ')], ' ');
  }),
  ObjectTypeDefinition: addDescription(function (_ref23) {
    var name = _ref23.name,
        interfaces = _ref23.interfaces,
        directives = _ref23.directives,
        fields = _ref23.fields;
    return join(['type', name, wrap('implements ', join(interfaces, ' & ')), join(directives, ' '), block(fields)], ' ');
  }),
  FieldDefinition: addDescription(function (_ref24) {
    var name = _ref24.name,
        args = _ref24.arguments,
        type = _ref24.type,
        directives = _ref24.directives;
    return name + (hasMultilineItems(args) ? wrap('(\n', indent(join(args, '\n')), '\n)') : wrap('(', join(args, ', '), ')')) + ': ' + type + wrap(' ', join(directives, ' '));
  }),
  InputValueDefinition: addDescription(function (_ref25) {
    var name = _ref25.name,
        type = _ref25.type,
        defaultValue = _ref25.defaultValue,
        directives = _ref25.directives;
    return join([name + ': ' + type, wrap('= ', defaultValue), join(directives, ' ')], ' ');
  }),
  InterfaceTypeDefinition: addDescription(function (_ref26) {
    var name = _ref26.name,
        interfaces = _ref26.interfaces,
        directives = _ref26.directives,
        fields = _ref26.fields;
    return join(['interface', name, wrap('implements ', join(interfaces, ' & ')), join(directives, ' '), block(fields)], ' ');
  }),
  UnionTypeDefinition: addDescription(function (_ref27) {
    var name = _ref27.name,
        directives = _ref27.directives,
        types = _ref27.types;
    return join(['union', name, join(directives, ' '), types && types.length !== 0 ? '= ' + join(types, ' | ') : ''], ' ');
  }),
  EnumTypeDefinition: addDescription(function (_ref28) {
    var name = _ref28.name,
        directives = _ref28.directives,
        values = _ref28.values;
    return join(['enum', name, join(directives, ' '), block(values)], ' ');
  }),
  EnumValueDefinition: addDescription(function (_ref29) {
    var name = _ref29.name,
        directives = _ref29.directives;
    return join([name, join(directives, ' ')], ' ');
  }),
  InputObjectTypeDefinition: addDescription(function (_ref30) {
    var name = _ref30.name,
        directives = _ref30.directives,
        fields = _ref30.fields;
    return join(['input', name, join(directives, ' '), block(fields)], ' ');
  }),
  DirectiveDefinition: addDescription(function (_ref31) {
    var name = _ref31.name,
        args = _ref31.arguments,
        repeatable = _ref31.repeatable,
        locations = _ref31.locations;
    return 'directive @' + name + (hasMultilineItems(args) ? wrap('(\n', indent(join(args, '\n')), '\n)') : wrap('(', join(args, ', '), ')')) + (repeatable ? ' repeatable' : '') + ' on ' + join(locations, ' | ');
  }),
  SchemaExtension: function SchemaExtension(_ref32) {
    var directives = _ref32.directives,
        operationTypes = _ref32.operationTypes;
    return join(['extend schema', join(directives, ' '), block(operationTypes)], ' ');
  },
  ScalarTypeExtension: function ScalarTypeExtension(_ref33) {
    var name = _ref33.name,
        directives = _ref33.directives;
    return join(['extend scalar', name, join(directives, ' ')], ' ');
  },
  ObjectTypeExtension: function ObjectTypeExtension(_ref34) {
    var name = _ref34.name,
        interfaces = _ref34.interfaces,
        directives = _ref34.directives,
        fields = _ref34.fields;
    return join(['extend type', name, wrap('implements ', join(interfaces, ' & ')), join(directives, ' '), block(fields)], ' ');
  },
  InterfaceTypeExtension: function InterfaceTypeExtension(_ref35) {
    var name = _ref35.name,
        interfaces = _ref35.interfaces,
        directives = _ref35.directives,
        fields = _ref35.fields;
    return join(['extend interface', name, wrap('implements ', join(interfaces, ' & ')), join(directives, ' '), block(fields)], ' ');
  },
  UnionTypeExtension: function UnionTypeExtension(_ref36) {
    var name = _ref36.name,
        directives = _ref36.directives,
        types = _ref36.types;
    return join(['extend union', name, join(directives, ' '), types && types.length !== 0 ? '= ' + join(types, ' | ') : ''], ' ');
  },
  EnumTypeExtension: function EnumTypeExtension(_ref37) {
    var name = _ref37.name,
        directives = _ref37.directives,
        values = _ref37.values;
    return join(['extend enum', name, join(directives, ' '), block(values)], ' ');
  },
  InputObjectTypeExtension: function InputObjectTypeExtension(_ref38) {
    var name = _ref38.name,
        directives = _ref38.directives,
        fields = _ref38.fields;
    return join(['extend input', name, join(directives, ' '), block(fields)], ' ');
  }
};

function addDescription(cb) {
  return function (node) {
    return join([node.description, cb(node)], '\n');
  };
}
/**
 * Given maybeArray, print an empty string if it is null or empty, otherwise
 * print all items together separated by separator if provided
 */


function join(maybeArray) {
  var _maybeArray$filter$jo;

  var separator = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : '';
  return (_maybeArray$filter$jo = maybeArray === null || maybeArray === void 0 ? void 0 : maybeArray.filter(function (x) {
    return x;
  }).join(separator)) !== null && _maybeArray$filter$jo !== void 0 ? _maybeArray$filter$jo : '';
}
/**
 * Given array, print each item on its own line, wrapped in an
 * indented "{ }" block.
 */


function block(array) {
  return wrap('{\n', indent(join(array, '\n')), '\n}');
}
/**
 * If maybeString is not null or empty, then wrap with start and end, otherwise print an empty string.
 */


function wrap(start, maybeString) {
  var end = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : '';
  return maybeString != null && maybeString !== '' ? start + maybeString + end : '';
}

function indent(str) {
  return wrap('  ', str.replace(/\n/g, '\n  '));
}

function isMultiline(str) {
  return str.indexOf('\n') !== -1;
}

function hasMultilineItems(maybeArray) {
  return maybeArray != null && maybeArray.some(isMultiline);
}


/***/ }),
/* 8 */
/***/ (function(module, exports, __webpack_require__) {

"use strict";


Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.visit = visit;
exports.visitInParallel = visitInParallel;
exports.getVisitFn = getVisitFn;
exports.BREAK = exports.QueryDocumentKeys = void 0;

var _inspect = _interopRequireDefault(__webpack_require__(9));

var _ast = __webpack_require__(10);

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

var QueryDocumentKeys = {
  Name: [],
  Document: ['definitions'],
  OperationDefinition: ['name', 'variableDefinitions', 'directives', 'selectionSet'],
  VariableDefinition: ['variable', 'type', 'defaultValue', 'directives'],
  Variable: ['name'],
  SelectionSet: ['selections'],
  Field: ['alias', 'name', 'arguments', 'directives', 'selectionSet'],
  Argument: ['name', 'value'],
  FragmentSpread: ['name', 'directives'],
  InlineFragment: ['typeCondition', 'directives', 'selectionSet'],
  FragmentDefinition: ['name', // Note: fragment variable definitions are experimental and may be changed
  // or removed in the future.
  'variableDefinitions', 'typeCondition', 'directives', 'selectionSet'],
  IntValue: [],
  FloatValue: [],
  StringValue: [],
  BooleanValue: [],
  NullValue: [],
  EnumValue: [],
  ListValue: ['values'],
  ObjectValue: ['fields'],
  ObjectField: ['name', 'value'],
  Directive: ['name', 'arguments'],
  NamedType: ['name'],
  ListType: ['type'],
  NonNullType: ['type'],
  SchemaDefinition: ['description', 'directives', 'operationTypes'],
  OperationTypeDefinition: ['type'],
  ScalarTypeDefinition: ['description', 'name', 'directives'],
  ObjectTypeDefinition: ['description', 'name', 'interfaces', 'directives', 'fields'],
  FieldDefinition: ['description', 'name', 'arguments', 'type', 'directives'],
  InputValueDefinition: ['description', 'name', 'type', 'defaultValue', 'directives'],
  InterfaceTypeDefinition: ['description', 'name', 'interfaces', 'directives', 'fields'],
  UnionTypeDefinition: ['description', 'name', 'directives', 'types'],
  EnumTypeDefinition: ['description', 'name', 'directives', 'values'],
  EnumValueDefinition: ['description', 'name', 'directives'],
  InputObjectTypeDefinition: ['description', 'name', 'directives', 'fields'],
  DirectiveDefinition: ['description', 'name', 'arguments', 'locations'],
  SchemaExtension: ['directives', 'operationTypes'],
  ScalarTypeExtension: ['name', 'directives'],
  ObjectTypeExtension: ['name', 'interfaces', 'directives', 'fields'],
  InterfaceTypeExtension: ['name', 'interfaces', 'directives', 'fields'],
  UnionTypeExtension: ['name', 'directives', 'types'],
  EnumTypeExtension: ['name', 'directives', 'values'],
  InputObjectTypeExtension: ['name', 'directives', 'fields']
};
exports.QueryDocumentKeys = QueryDocumentKeys;
var BREAK = Object.freeze({});
/**
 * visit() will walk through an AST using a depth-first traversal, calling
 * the visitor's enter function at each node in the traversal, and calling the
 * leave function after visiting that node and all of its child nodes.
 *
 * By returning different values from the enter and leave functions, the
 * behavior of the visitor can be altered, including skipping over a sub-tree of
 * the AST (by returning false), editing the AST by returning a value or null
 * to remove the value, or to stop the whole traversal by returning BREAK.
 *
 * When using visit() to edit an AST, the original AST will not be modified, and
 * a new version of the AST with the changes applied will be returned from the
 * visit function.
 *
 *     const editedAST = visit(ast, {
 *       enter(node, key, parent, path, ancestors) {
 *         // @return
 *         //   undefined: no action
 *         //   false: skip visiting this node
 *         //   visitor.BREAK: stop visiting altogether
 *         //   null: delete this node
 *         //   any value: replace this node with the returned value
 *       },
 *       leave(node, key, parent, path, ancestors) {
 *         // @return
 *         //   undefined: no action
 *         //   false: no action
 *         //   visitor.BREAK: stop visiting altogether
 *         //   null: delete this node
 *         //   any value: replace this node with the returned value
 *       }
 *     });
 *
 * Alternatively to providing enter() and leave() functions, a visitor can
 * instead provide functions named the same as the kinds of AST nodes, or
 * enter/leave visitors at a named key, leading to four permutations of the
 * visitor API:
 *
 * 1) Named visitors triggered when entering a node of a specific kind.
 *
 *     visit(ast, {
 *       Kind(node) {
 *         // enter the "Kind" node
 *       }
 *     })
 *
 * 2) Named visitors that trigger upon entering and leaving a node of
 *    a specific kind.
 *
 *     visit(ast, {
 *       Kind: {
 *         enter(node) {
 *           // enter the "Kind" node
 *         }
 *         leave(node) {
 *           // leave the "Kind" node
 *         }
 *       }
 *     })
 *
 * 3) Generic visitors that trigger upon entering and leaving any node.
 *
 *     visit(ast, {
 *       enter(node) {
 *         // enter any node
 *       },
 *       leave(node) {
 *         // leave any node
 *       }
 *     })
 *
 * 4) Parallel visitors for entering and leaving nodes of a specific kind.
 *
 *     visit(ast, {
 *       enter: {
 *         Kind(node) {
 *           // enter the "Kind" node
 *         }
 *       },
 *       leave: {
 *         Kind(node) {
 *           // leave the "Kind" node
 *         }
 *       }
 *     })
 */

exports.BREAK = BREAK;

function visit(root, visitor) {
  var visitorKeys = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : QueryDocumentKeys;

  /* eslint-disable no-undef-init */
  var stack = undefined;
  var inArray = Array.isArray(root);
  var keys = [root];
  var index = -1;
  var edits = [];
  var node = undefined;
  var key = undefined;
  var parent = undefined;
  var path = [];
  var ancestors = [];
  var newRoot = root;
  /* eslint-enable no-undef-init */

  do {
    index++;
    var isLeaving = index === keys.length;
    var isEdited = isLeaving && edits.length !== 0;

    if (isLeaving) {
      key = ancestors.length === 0 ? undefined : path[path.length - 1];
      node = parent;
      parent = ancestors.pop();

      if (isEdited) {
        if (inArray) {
          node = node.slice();
        } else {
          var clone = {};

          for (var _i2 = 0, _Object$keys2 = Object.keys(node); _i2 < _Object$keys2.length; _i2++) {
            var k = _Object$keys2[_i2];
            clone[k] = node[k];
          }

          node = clone;
        }

        var editOffset = 0;

        for (var ii = 0; ii < edits.length; ii++) {
          var editKey = edits[ii][0];
          var editValue = edits[ii][1];

          if (inArray) {
            editKey -= editOffset;
          }

          if (inArray && editValue === null) {
            node.splice(editKey, 1);
            editOffset++;
          } else {
            node[editKey] = editValue;
          }
        }
      }

      index = stack.index;
      keys = stack.keys;
      edits = stack.edits;
      inArray = stack.inArray;
      stack = stack.prev;
    } else {
      key = parent ? inArray ? index : keys[index] : undefined;
      node = parent ? parent[key] : newRoot;

      if (node === null || node === undefined) {
        continue;
      }

      if (parent) {
        path.push(key);
      }
    }

    var result = void 0;

    if (!Array.isArray(node)) {
      if (!(0, _ast.isNode)(node)) {
        throw new Error("Invalid AST Node: ".concat((0, _inspect.default)(node), "."));
      }

      var visitFn = getVisitFn(visitor, node.kind, isLeaving);

      if (visitFn) {
        result = visitFn.call(visitor, node, key, parent, path, ancestors);

        if (result === BREAK) {
          break;
        }

        if (result === false) {
          if (!isLeaving) {
            path.pop();
            continue;
          }
        } else if (result !== undefined) {
          edits.push([key, result]);

          if (!isLeaving) {
            if ((0, _ast.isNode)(result)) {
              node = result;
            } else {
              path.pop();
              continue;
            }
          }
        }
      }
    }

    if (result === undefined && isEdited) {
      edits.push([key, node]);
    }

    if (isLeaving) {
      path.pop();
    } else {
      var _visitorKeys$node$kin;

      stack = {
        inArray: inArray,
        index: index,
        keys: keys,
        edits: edits,
        prev: stack
      };
      inArray = Array.isArray(node);
      keys = inArray ? node : (_visitorKeys$node$kin = visitorKeys[node.kind]) !== null && _visitorKeys$node$kin !== void 0 ? _visitorKeys$node$kin : [];
      index = -1;
      edits = [];

      if (parent) {
        ancestors.push(parent);
      }

      parent = node;
    }
  } while (stack !== undefined);

  if (edits.length !== 0) {
    newRoot = edits[edits.length - 1][1];
  }

  return newRoot;
}
/**
 * Creates a new visitor instance which delegates to many visitors to run in
 * parallel. Each visitor will be visited for each node before moving on.
 *
 * If a prior visitor edits a node, no following visitors will see that node.
 */


function visitInParallel(visitors) {
  var skipping = new Array(visitors.length);
  return {
    enter: function enter(node) {
      for (var i = 0; i < visitors.length; i++) {
        if (skipping[i] == null) {
          var fn = getVisitFn(visitors[i], node.kind,
          /* isLeaving */
          false);

          if (fn) {
            var result = fn.apply(visitors[i], arguments);

            if (result === false) {
              skipping[i] = node;
            } else if (result === BREAK) {
              skipping[i] = BREAK;
            } else if (result !== undefined) {
              return result;
            }
          }
        }
      }
    },
    leave: function leave(node) {
      for (var i = 0; i < visitors.length; i++) {
        if (skipping[i] == null) {
          var fn = getVisitFn(visitors[i], node.kind,
          /* isLeaving */
          true);

          if (fn) {
            var result = fn.apply(visitors[i], arguments);

            if (result === BREAK) {
              skipping[i] = BREAK;
            } else if (result !== undefined && result !== false) {
              return result;
            }
          }
        } else if (skipping[i] === node) {
          skipping[i] = null;
        }
      }
    }
  };
}
/**
 * Given a visitor instance, if it is leaving or not, and a node kind, return
 * the function the visitor runtime should call.
 */


function getVisitFn(visitor, kind, isLeaving) {
  var kindVisitor = visitor[kind];

  if (kindVisitor) {
    if (!isLeaving && typeof kindVisitor === 'function') {
      // { Kind() {} }
      return kindVisitor;
    }

    var kindSpecificVisitor = isLeaving ? kindVisitor.leave : kindVisitor.enter;

    if (typeof kindSpecificVisitor === 'function') {
      // { Kind: { enter() {}, leave() {} } }
      return kindSpecificVisitor;
    }
  } else {
    var specificVisitor = isLeaving ? visitor.leave : visitor.enter;

    if (specificVisitor) {
      if (typeof specificVisitor === 'function') {
        // { enter() {}, leave() {} }
        return specificVisitor;
      }

      var specificKindVisitor = specificVisitor[kind];

      if (typeof specificKindVisitor === 'function') {
        // { enter: { Kind() {} }, leave: { Kind() {} } }
        return specificKindVisitor;
      }
    }
  }
}


/***/ }),
/* 9 */
/***/ (function(module, exports, __webpack_require__) {

"use strict";


Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = inspect;

var _nodejsCustomInspectSymbol = _interopRequireDefault(__webpack_require__(1));

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

function _typeof(obj) { "@babel/helpers - typeof"; if (typeof Symbol === "function" && typeof Symbol.iterator === "symbol") { _typeof = function _typeof(obj) { return typeof obj; }; } else { _typeof = function _typeof(obj) { return obj && typeof Symbol === "function" && obj.constructor === Symbol && obj !== Symbol.prototype ? "symbol" : typeof obj; }; } return _typeof(obj); }

var MAX_ARRAY_LENGTH = 10;
var MAX_RECURSIVE_DEPTH = 2;
/**
 * Used to print values in error messages.
 */

function inspect(value) {
  return formatValue(value, []);
}

function formatValue(value, seenValues) {
  switch (_typeof(value)) {
    case 'string':
      return JSON.stringify(value);

    case 'function':
      return value.name ? "[function ".concat(value.name, "]") : '[function]';

    case 'object':
      if (value === null) {
        return 'null';
      }

      return formatObjectValue(value, seenValues);

    default:
      return String(value);
  }
}

function formatObjectValue(value, previouslySeenValues) {
  if (previouslySeenValues.indexOf(value) !== -1) {
    return '[Circular]';
  }

  var seenValues = [].concat(previouslySeenValues, [value]);
  var customInspectFn = getCustomFn(value);

  if (customInspectFn !== undefined) {
    var customValue = customInspectFn.call(value); // check for infinite recursion

    if (customValue !== value) {
      return typeof customValue === 'string' ? customValue : formatValue(customValue, seenValues);
    }
  } else if (Array.isArray(value)) {
    return formatArray(value, seenValues);
  }

  return formatObject(value, seenValues);
}

function formatObject(object, seenValues) {
  var keys = Object.keys(object);

  if (keys.length === 0) {
    return '{}';
  }

  if (seenValues.length > MAX_RECURSIVE_DEPTH) {
    return '[' + getObjectTag(object) + ']';
  }

  var properties = keys.map(function (key) {
    var value = formatValue(object[key], seenValues);
    return key + ': ' + value;
  });
  return '{ ' + properties.join(', ') + ' }';
}

function formatArray(array, seenValues) {
  if (array.length === 0) {
    return '[]';
  }

  if (seenValues.length > MAX_RECURSIVE_DEPTH) {
    return '[Array]';
  }

  var len = Math.min(MAX_ARRAY_LENGTH, array.length);
  var remaining = array.length - len;
  var items = [];

  for (var i = 0; i < len; ++i) {
    items.push(formatValue(array[i], seenValues));
  }

  if (remaining === 1) {
    items.push('... 1 more item');
  } else if (remaining > 1) {
    items.push("... ".concat(remaining, " more items"));
  }

  return '[' + items.join(', ') + ']';
}

function getCustomFn(object) {
  var customInspectFn = object[String(_nodejsCustomInspectSymbol.default)];

  if (typeof customInspectFn === 'function') {
    return customInspectFn;
  }

  if (typeof object.inspect === 'function') {
    return object.inspect;
  }
}

function getObjectTag(object) {
  var tag = Object.prototype.toString.call(object).replace(/^\[object /, '').replace(/]$/, '');

  if (tag === 'Object' && typeof object.constructor === 'function') {
    var name = object.constructor.name;

    if (typeof name === 'string' && name !== '') {
      return name;
    }
  }

  return tag;
}


/***/ }),
/* 10 */
/***/ (function(module, exports, __webpack_require__) {

"use strict";


Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.isNode = isNode;
exports.Token = exports.Location = void 0;

var _defineInspect = _interopRequireDefault(__webpack_require__(11));

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

/**
 * Contains a range of UTF-8 character offsets and token references that
 * identify the region of the source from which the AST derived.
 */
var Location = /*#__PURE__*/function () {
  /**
   * The character offset at which this Node begins.
   */

  /**
   * The character offset at which this Node ends.
   */

  /**
   * The Token at which this Node begins.
   */

  /**
   * The Token at which this Node ends.
   */

  /**
   * The Source document the AST represents.
   */
  function Location(startToken, endToken, source) {
    this.start = startToken.start;
    this.end = endToken.end;
    this.startToken = startToken;
    this.endToken = endToken;
    this.source = source;
  }

  var _proto = Location.prototype;

  _proto.toJSON = function toJSON() {
    return {
      start: this.start,
      end: this.end
    };
  };

  return Location;
}(); // Print a simplified form when appearing in `inspect` and `util.inspect`.


exports.Location = Location;
(0, _defineInspect.default)(Location);
/**
 * Represents a range of characters represented by a lexical token
 * within a Source.
 */

var Token = /*#__PURE__*/function () {
  /**
   * The kind of Token.
   */

  /**
   * The character offset at which this Node begins.
   */

  /**
   * The character offset at which this Node ends.
   */

  /**
   * The 1-indexed line number on which this Token appears.
   */

  /**
   * The 1-indexed column number at which this Token begins.
   */

  /**
   * For non-punctuation tokens, represents the interpreted value of the token.
   */

  /**
   * Tokens exist as nodes in a double-linked-list amongst all tokens
   * including ignored tokens. <SOF> is always the first node and <EOF>
   * the last.
   */
  function Token(kind, start, end, line, column, prev, value) {
    this.kind = kind;
    this.start = start;
    this.end = end;
    this.line = line;
    this.column = column;
    this.value = value;
    this.prev = prev;
    this.next = null;
  }

  var _proto2 = Token.prototype;

  _proto2.toJSON = function toJSON() {
    return {
      kind: this.kind,
      value: this.value,
      line: this.line,
      column: this.column
    };
  };

  return Token;
}(); // Print a simplified form when appearing in `inspect` and `util.inspect`.


exports.Token = Token;
(0, _defineInspect.default)(Token);
/**
 * @internal
 */

function isNode(maybeNode) {
  return maybeNode != null && typeof maybeNode.kind === 'string';
}
/**
 * The list of all possible AST node types.
 */


/***/ }),
/* 11 */
/***/ (function(module, exports, __webpack_require__) {

"use strict";


Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = defineInspect;

var _invariant = _interopRequireDefault(__webpack_require__(12));

var _nodejsCustomInspectSymbol = _interopRequireDefault(__webpack_require__(1));

function _interopRequireDefault(obj) { return obj && obj.__esModule ? obj : { default: obj }; }

/**
 * The `defineInspect()` function defines `inspect()` prototype method as alias of `toJSON`
 */
function defineInspect(classObject) {
  var fn = classObject.prototype.toJSON;
  typeof fn === 'function' || (0, _invariant.default)(0);
  classObject.prototype.inspect = fn; // istanbul ignore else (See: 'https://github.com/graphql/graphql-js/issues/2317')

  if (_nodejsCustomInspectSymbol.default) {
    classObject.prototype[_nodejsCustomInspectSymbol.default] = fn;
  }
}


/***/ }),
/* 12 */
/***/ (function(module, exports, __webpack_require__) {

"use strict";


Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.default = invariant;

function invariant(condition, message) {
  var booleanCondition = Boolean(condition); // istanbul ignore else (See transformation done in './resources/inlineInvariant.js')

  if (!booleanCondition) {
    throw new Error(message != null ? message : 'Unexpected invariant triggered.');
  }
}


/***/ }),
/* 13 */
/***/ (function(module, exports, __webpack_require__) {

"use strict";


Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.dedentBlockStringValue = dedentBlockStringValue;
exports.getBlockStringIndentation = getBlockStringIndentation;
exports.printBlockString = printBlockString;

/**
 * Produces the value of a block string from its parsed raw value, similar to
 * CoffeeScript's block string, Python's docstring trim or Ruby's strip_heredoc.
 *
 * This implements the GraphQL spec's BlockStringValue() static algorithm.
 *
 * @internal
 */
function dedentBlockStringValue(rawString) {
  // Expand a block string's raw value into independent lines.
  var lines = rawString.split(/\r\n|[\n\r]/g); // Remove common indentation from all lines but first.

  var commonIndent = getBlockStringIndentation(rawString);

  if (commonIndent !== 0) {
    for (var i = 1; i < lines.length; i++) {
      lines[i] = lines[i].slice(commonIndent);
    }
  } // Remove leading and trailing blank lines.


  var startLine = 0;

  while (startLine < lines.length && isBlank(lines[startLine])) {
    ++startLine;
  }

  var endLine = lines.length;

  while (endLine > startLine && isBlank(lines[endLine - 1])) {
    --endLine;
  } // Return a string of the lines joined with U+000A.


  return lines.slice(startLine, endLine).join('\n');
}

function isBlank(str) {
  for (var i = 0; i < str.length; ++i) {
    if (str[i] !== ' ' && str[i] !== '\t') {
      return false;
    }
  }

  return true;
}
/**
 * @internal
 */


function getBlockStringIndentation(value) {
  var _commonIndent;

  var isFirstLine = true;
  var isEmptyLine = true;
  var indent = 0;
  var commonIndent = null;

  for (var i = 0; i < value.length; ++i) {
    switch (value.charCodeAt(i)) {
      case 13:
        //  \r
        if (value.charCodeAt(i + 1) === 10) {
          ++i; // skip \r\n as one symbol
        }

      // falls through

      case 10:
        //  \n
        isFirstLine = false;
        isEmptyLine = true;
        indent = 0;
        break;

      case 9: //   \t

      case 32:
        //  <space>
        ++indent;
        break;

      default:
        if (isEmptyLine && !isFirstLine && (commonIndent === null || indent < commonIndent)) {
          commonIndent = indent;
        }

        isEmptyLine = false;
    }
  }

  return (_commonIndent = commonIndent) !== null && _commonIndent !== void 0 ? _commonIndent : 0;
}
/**
 * Print a block string in the indented block form by adding a leading and
 * trailing blank line. However, if a block string starts with whitespace and is
 * a single-line, adding a leading blank line would strip that whitespace.
 *
 * @internal
 */


function printBlockString(value) {
  var indentation = arguments.length > 1 && arguments[1] !== undefined ? arguments[1] : '';
  var preferMultipleLines = arguments.length > 2 && arguments[2] !== undefined ? arguments[2] : false;
  var isSingleLine = value.indexOf('\n') === -1;
  var hasLeadingSpace = value[0] === ' ' || value[0] === '\t';
  var hasTrailingQuote = value[value.length - 1] === '"';
  var hasTrailingSlash = value[value.length - 1] === '\\';
  var printAsMultipleLines = !isSingleLine || hasTrailingQuote || hasTrailingSlash || preferMultipleLines;
  var result = ''; // Format a multi-line block quote to account for leading space.

  if (printAsMultipleLines && !(isSingleLine && hasLeadingSpace)) {
    result += '\n' + indentation;
  }

  result += indentation ? value.replace(/\n/g, '\n' + indentation) : value;

  if (printAsMultipleLines) {
    result += '\n';
  }

  return '"""' + result.replace(/"""/g, '\\"""') + '"""';
}


/***/ }),
/* 14 */
/***/ (function(module, exports, __webpack_require__) {

"use strict";


Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.getOperationAST = getOperationAST;

var _kinds = __webpack_require__(15);

/**
 * Returns an operation AST given a document AST and optionally an operation
 * name. If a name is not provided, an operation is only returned if only one is
 * provided in the document.
 */
function getOperationAST(documentAST, operationName) {
  var operation = null;

  for (var _i2 = 0, _documentAST$definiti2 = documentAST.definitions; _i2 < _documentAST$definiti2.length; _i2++) {
    var definition = _documentAST$definiti2[_i2];

    if (definition.kind === _kinds.Kind.OPERATION_DEFINITION) {
      var _definition$name;

      if (operationName == null) {
        // If no operation name was provided, only return an Operation if there
        // is one defined in the document. Upon encountering the second, return
        // null.
        if (operation) {
          return null;
        }

        operation = definition;
      } else if (((_definition$name = definition.name) === null || _definition$name === void 0 ? void 0 : _definition$name.value) === operationName) {
        return definition;
      }
    }
  }

  return operation;
}


/***/ }),
/* 15 */
/***/ (function(module, exports, __webpack_require__) {

"use strict";


Object.defineProperty(exports, "__esModule", {
  value: true
});
exports.Kind = void 0;

/**
 * The set of allowed kind values for AST nodes.
 */
var Kind = Object.freeze({
  // Name
  NAME: 'Name',
  // Document
  DOCUMENT: 'Document',
  OPERATION_DEFINITION: 'OperationDefinition',
  VARIABLE_DEFINITION: 'VariableDefinition',
  SELECTION_SET: 'SelectionSet',
  FIELD: 'Field',
  ARGUMENT: 'Argument',
  // Fragments
  FRAGMENT_SPREAD: 'FragmentSpread',
  INLINE_FRAGMENT: 'InlineFragment',
  FRAGMENT_DEFINITION: 'FragmentDefinition',
  // Values
  VARIABLE: 'Variable',
  INT: 'IntValue',
  FLOAT: 'FloatValue',
  STRING: 'StringValue',
  BOOLEAN: 'BooleanValue',
  NULL: 'NullValue',
  ENUM: 'EnumValue',
  LIST: 'ListValue',
  OBJECT: 'ObjectValue',
  OBJECT_FIELD: 'ObjectField',
  // Directives
  DIRECTIVE: 'Directive',
  // Types
  NAMED_TYPE: 'NamedType',
  LIST_TYPE: 'ListType',
  NON_NULL_TYPE: 'NonNullType',
  // Type System Definitions
  SCHEMA_DEFINITION: 'SchemaDefinition',
  OPERATION_TYPE_DEFINITION: 'OperationTypeDefinition',
  // Type Definitions
  SCALAR_TYPE_DEFINITION: 'ScalarTypeDefinition',
  OBJECT_TYPE_DEFINITION: 'ObjectTypeDefinition',
  FIELD_DEFINITION: 'FieldDefinition',
  INPUT_VALUE_DEFINITION: 'InputValueDefinition',
  INTERFACE_TYPE_DEFINITION: 'InterfaceTypeDefinition',
  UNION_TYPE_DEFINITION: 'UnionTypeDefinition',
  ENUM_TYPE_DEFINITION: 'EnumTypeDefinition',
  ENUM_VALUE_DEFINITION: 'EnumValueDefinition',
  INPUT_OBJECT_TYPE_DEFINITION: 'InputObjectTypeDefinition',
  // Directive Definitions
  DIRECTIVE_DEFINITION: 'DirectiveDefinition',
  // Type System Extensions
  SCHEMA_EXTENSION: 'SchemaExtension',
  // Type Extensions
  SCALAR_TYPE_EXTENSION: 'ScalarTypeExtension',
  OBJECT_TYPE_EXTENSION: 'ObjectTypeExtension',
  INTERFACE_TYPE_EXTENSION: 'InterfaceTypeExtension',
  UNION_TYPE_EXTENSION: 'UnionTypeExtension',
  ENUM_TYPE_EXTENSION: 'EnumTypeExtension',
  INPUT_OBJECT_TYPE_EXTENSION: 'InputObjectTypeExtension'
});
/**
 * The enum type representing the possible kind values of AST nodes.
 */

exports.Kind = Kind;


/***/ }),
/* 16 */
/***/ (function(module, __webpack_exports__, __webpack_require__) {

"use strict";
Object.defineProperty(__webpack_exports__, "__esModule", { value: true });
/* WEBPACK VAR INJECTION */(function(global, module) {/* harmony import */ var __WEBPACK_IMPORTED_MODULE_0__ponyfill_js__ = __webpack_require__(18);
/* global window */


var root;

if (typeof self !== 'undefined') {
  root = self;
} else if (typeof window !== 'undefined') {
  root = window;
} else if (typeof global !== 'undefined') {
  root = global;
} else if (true) {
  root = module;
} else {
  root = Function('return this')();
}

var result = Object(__WEBPACK_IMPORTED_MODULE_0__ponyfill_js__["a" /* default */])(root);
/* harmony default export */ __webpack_exports__["default"] = (result);

/* WEBPACK VAR INJECTION */}.call(__webpack_exports__, __webpack_require__(0), __webpack_require__(17)(module)))

/***/ }),
/* 17 */
/***/ (function(module, exports) {

module.exports = function(originalModule) {
	if(!originalModule.webpackPolyfill) {
		var module = Object.create(originalModule);
		// module.parent = undefined by default
		if(!module.children) module.children = [];
		Object.defineProperty(module, "loaded", {
			enumerable: true,
			get: function() {
				return module.l;
			}
		});
		Object.defineProperty(module, "id", {
			enumerable: true,
			get: function() {
				return module.i;
			}
		});
		Object.defineProperty(module, "exports", {
			enumerable: true,
		});
		module.webpackPolyfill = 1;
	}
	return module;
};


/***/ }),
/* 18 */
/***/ (function(module, __webpack_exports__, __webpack_require__) {

"use strict";
/* harmony export (immutable) */ __webpack_exports__["a"] = symbolObservablePonyfill;
function symbolObservablePonyfill(root) {
	var result;
	var Symbol = root.Symbol;

	if (typeof Symbol === 'function') {
		if (Symbol.observable) {
			result = Symbol.observable;
		} else {
			result = Symbol('observable');
			Symbol.observable = result;
		}
	} else {
		result = '@@observable';
	}

	return result;
};


/***/ }),
/* 19 */
/***/ (function(module, exports, __webpack_require__) {

"use strict";

Object.defineProperty(exports, "__esModule", { value: true });
exports.GRAPHQL_SUBSCRIPTIONS = exports.GRAPHQL_WS = void 0;
var GRAPHQL_WS = 'graphql-ws';
exports.GRAPHQL_WS = GRAPHQL_WS;
var GRAPHQL_SUBSCRIPTIONS = 'graphql-subscriptions';
exports.GRAPHQL_SUBSCRIPTIONS = GRAPHQL_SUBSCRIPTIONS;
//# sourceMappingURL=protocol.js.map

/***/ }),
/* 20 */
/***/ (function(module, exports, __webpack_require__) {

"use strict";

Object.defineProperty(exports, "__esModule", { value: true });
exports.WS_TIMEOUT = exports.MIN_WS_TIMEOUT = void 0;
var MIN_WS_TIMEOUT = 1000;
exports.MIN_WS_TIMEOUT = MIN_WS_TIMEOUT;
var WS_TIMEOUT = 30000;
exports.WS_TIMEOUT = WS_TIMEOUT;
//# sourceMappingURL=defaults.js.map

/***/ }),
/* 21 */
/***/ (function(module, exports, __webpack_require__) {

"use strict";

Object.defineProperty(exports, "__esModule", { value: true });
var MessageTypes = (function () {
    function MessageTypes() {
        throw new Error('Static Class');
    }
    MessageTypes.GQL_CONNECTION_INIT = 'connection_init';
    MessageTypes.GQL_CONNECTION_ACK = 'connection_ack';
    MessageTypes.GQL_CONNECTION_ERROR = 'connection_error';
    MessageTypes.GQL_CONNECTION_KEEP_ALIVE = 'ka';
    MessageTypes.GQL_CONNECTION_TERMINATE = 'connection_terminate';
    MessageTypes.GQL_START = 'start';
    MessageTypes.GQL_DATA = 'data';
    MessageTypes.GQL_ERROR = 'error';
    MessageTypes.GQL_COMPLETE = 'complete';
    MessageTypes.GQL_STOP = 'stop';
    MessageTypes.SUBSCRIPTION_START = 'subscription_start';
    MessageTypes.SUBSCRIPTION_DATA = 'subscription_data';
    MessageTypes.SUBSCRIPTION_SUCCESS = 'subscription_success';
    MessageTypes.SUBSCRIPTION_FAIL = 'subscription_fail';
    MessageTypes.SUBSCRIPTION_END = 'subscription_end';
    MessageTypes.INIT = 'init';
    MessageTypes.INIT_SUCCESS = 'init_success';
    MessageTypes.INIT_FAIL = 'init_fail';
    MessageTypes.KEEP_ALIVE = 'keepalive';
    return MessageTypes;
}());
exports.default = MessageTypes;
//# sourceMappingURL=message-types.js.map

/***/ })
/******/ ]);