react-native-fbsdk/lib/module/FBGraphRequestManager.js

Facebook SDK support for React Native apps.

/**
 * Copyright (c) 2015-present, Facebook, Inc. All rights reserved.
 *
 * You are hereby granted a non-exclusive, worldwide, royalty-free license to use,
 * copy, modify, and distribute this software in source code or binary form for use
 * in connection with the web services and APIs provided by Facebook.
 *
 * As with any software that integrates with the Facebook platform, your use of
 * this software is subject to the Facebook Developer Principles and Policies
 * [http://developers.facebook.com/policy/]. This copyright notice shall be
 * included in all copies or substantial portions of the software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, FITNESS
 * FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR
 * COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER
 * IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
 * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
 *
 * 
 * @format
 */
'use strict';

function _defineProperty(obj, key, value) { if (key in obj) { Object.defineProperty(obj, key, { value: value, enumerable: true, configurable: true, writable: true }); } else { obj[key] = value; } return obj; }

const NativeGraphRequestManager = require('react-native').NativeModules.FBGraphRequest;

function _verifyParameters(request) {
  if (request.config && request.config.parameters) {
    for (var key in request.config.parameters) {
      var param = request.config.parameters[key];

      if (typeof param === 'object' && param.string) {
        continue;
      }

      throw new Error("Unexpected value for parameter '" + key + "'. Request parameters " + "need to be objects with a 'string' field.");
    }
  }
}

class FBGraphRequestManager {
  constructor() {
    _defineProperty(this, "requestBatch", void 0);

    _defineProperty(this, "requestCallbacks", void 0);

    _defineProperty(this, "batchCallback", void 0);

    this.requestBatch = [];
    this.requestCallbacks = [];
  }
  /**
   * Add a graph request.
   */


  addRequest(request) {
    _verifyParameters(request);

    this.requestBatch.push(request);
    this.requestCallbacks.push(request.callback);
    return this;
  }
  /**
   * Add call back to the GraphRequestManager. Only one callback can be added.
   * Note that invocation of the batch callback does not indicate success of every
   * graph request made, only that the entire batch has finished executing.
   */


  addBatchCallback(callback) {
    this.batchCallback = callback;
    return this;
  }
  /**
   * Executes requests in a batch.
   * Note that when there's an issue with network connection the batch callback
   * behavior differs in Android and iOS.
   * On iOS, the batch callback returns an error if the batch fails with a network error.
   * On Android, the batch callback always returns {"result": "batch finished executing"}
   * after the batch time out. This is because detecting network status requires
   * extra permission and it's unncessary for the sdk. Instead, you can use the NetInfo module
   * in react-native to get the network status.
   */


  start(timeout) {
    const that = this;

    const callback = (error, result, response) => {
      if (response) {
        that.requestCallbacks.forEach((innerCallback, index, array) => {
          if (innerCallback) {
            innerCallback(response[index][0], response[index][1]);
          }
        });
      }

      if (that.batchCallback) {
        that.batchCallback(error, result);
      }
    };

    NativeGraphRequestManager.start(this.requestBatch, timeout || 0, callback);
  }

}

module.exports = FBGraphRequestManager;
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