apollo-client/transport/batchedNetworkInterface.js

A simple yet functional GraphQL client.

var __extends = (this && this.__extends) || function (d, b) {
    for (var p in b) if (b.hasOwnProperty(p)) d[p] = b[p];
    function __() { this.constructor = d; }
    d.prototype = b === null ? Object.create(b) : (__.prototype = b.prototype, new __());
};
var __assign = (this && this.__assign) || Object.assign || function(t) {
    for (var s, i = 1, n = arguments.length; i < n; i++) {
        s = arguments[i];
        for (var p in s) if (Object.prototype.hasOwnProperty.call(s, p))
            t[p] = s[p];
    }
    return t;
};
import 'whatwg-fetch';
import { HTTPFetchNetworkInterface, printRequest, } from './networkInterface';
import { QueryBatcher, } from './batching';
import { assign } from '../util/assign';
var HTTPBatchedNetworkInterface = (function (_super) {
    __extends(HTTPBatchedNetworkInterface, _super);
    function HTTPBatchedNetworkInterface(uri, pollInterval, fetchOpts) {
        var _this = _super.call(this, uri, fetchOpts) || this;
        if (typeof pollInterval !== 'number') {
            throw new Error("pollInterval must be a number, got " + pollInterval);
        }
        _this.pollInterval = pollInterval;
        _this.batcher = new QueryBatcher({
            batchFetchFunction: _this.batchQuery.bind(_this),
        });
        _this.batcher.start(_this.pollInterval);
        return _this;
    }
    ;
    HTTPBatchedNetworkInterface.prototype.query = function (request) {
        return this.batcher.enqueueRequest(request);
    };
    HTTPBatchedNetworkInterface.prototype.batchQuery = function (requests) {
        var _this = this;
        var options = __assign({}, this._opts);
        var middlewarePromises = [];
        requests.forEach(function (request) {
            middlewarePromises.push(_this.applyMiddlewares({
                request: request,
                options: options,
            }));
        });
        return new Promise(function (resolve, reject) {
            Promise.all(middlewarePromises).then(function (requestsAndOptions) {
                return _this.batchedFetchFromRemoteEndpoint(requestsAndOptions)
                    .then(function (result) {
                    var httpResponse = result;
                    if (!httpResponse.ok) {
                        var httpError = new Error("Network request failed with status " + httpResponse.status + " - \"" + httpResponse.statusText + "\"");
                        httpError.response = httpResponse;
                        throw httpError;
                    }
                    return result.json();
                })
                    .then(function (responses) {
                    if (typeof responses.map !== 'function') {
                        throw new Error('BatchingNetworkInterface: server response is not an array');
                    }
                    var afterwaresPromises = responses.map(function (response, index) {
                        return _this.applyAfterwares({
                            response: response,
                            options: requestsAndOptions[index].options,
                        });
                    });
                    Promise.all(afterwaresPromises).then(function (responsesAndOptions) {
                        var results = [];
                        responsesAndOptions.forEach(function (result) {
                            results.push(result.response);
                        });
                        resolve(results);
                    }).catch(function (error) {
                        reject(error);
                    });
                });
            }).catch(function (error) {
                reject(error);
            });
        });
    };
    HTTPBatchedNetworkInterface.prototype.batchedFetchFromRemoteEndpoint = function (requestsAndOptions) {
        var options = {};
        requestsAndOptions.forEach(function (requestAndOptions) {
            assign(options, requestAndOptions.options);
        });
        var printedRequests = requestsAndOptions.map(function (_a) {
            var request = _a.request;
            return printRequest(request);
        });
        return fetch(this._uri, __assign({}, this._opts, { body: JSON.stringify(printedRequests), method: 'POST' }, options, { headers: __assign({ Accept: '*/*', 'Content-Type': 'application/json' }, options.headers) }));
    };
    ;
    return HTTPBatchedNetworkInterface;
}(HTTPFetchNetworkInterface));
export { HTTPBatchedNetworkInterface };
export function createBatchingNetworkInterface(options) {
    if (!options) {
        throw new Error('You must pass an options argument to createNetworkInterface.');
    }
    return new HTTPBatchedNetworkInterface(options.uri, options.batchInterval, options.opts || {});
}
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