text: /*
   * QUANTCONNECT.COM - Democratizing Finance, Empowering Individuals.
   * Lean Algorithmic Trading Engine v2.0. Copyright 2014 QuantConnect Corporation.
   *
   * Licensed under the Apache License, Version 2.0 (the "License");
   * you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
  */
  using System;
  using System.Collections.Generic;
  using System.Linq;
  using System.Globalization;
  using QuantConnect.Configuration;
  using QuantConnect.Logging;
  using System.Threading;
  using QuantConnect.Util;
  
  namespace QuantConnect.ToolBox.GDAXDownloader
  {
      public static class GDAXDownloaderProgram
      {
          /// <summary>
          /// GDAX Downloader Toolbox Project For LEAN Algorithmic Trading Engine.
          /// </summary>
          public static void GDAXDownloader(IList<string> tickers, string resolution, DateTime fromDate, DateTime toDate)
          {
              Thread.CurrentThread.CurrentCulture = new CultureInfo("en-US");
  
              if (resolution.IsNullOrEmpty() || tickers.IsNullOrEmpty())
              {
                  Console.WriteLine("GDAXDownloader ERROR: '--tickers=' or '--resolution=' parameter is missing");
                  Console.WriteLine("--tickers=ETH-USD,ETH-BTC,BTC-USD,etc.");
                  Console.WriteLine("--resolution=Second/Minute/Hour/Daily");
                  Environment.Exit(1);
              }
              var castResolution = (Resolution) Enum.Parse(typeof(Resolution), resolution);
              try
              {
                  // Load settings from config.json
                  var dataDirectory = Config.Get("data-directory", "../../../Data");
                  //todo: will download any exchange but always save as gdax
                  // Create an instance of the downloader
                  const string market = Market.GDAX;
                  var downloader = new GDAXDownloader();
                  foreach (var ticker in tickers)
                  {
                      // Download the data
                      var symbolObject = Symbol.Create(ticker, SecurityType.Crypto, market);
                      var data = downloader.Get(symbolObject, castResolution, fromDate, toDate);
  
                      // Save the data
                      var writer = new LeanDataWriter(castResolution, symbolObject, dataDirectory, TickType.Trade);
                      var distinctData = data.GroupBy(i => i.Time, (key, group) => group.First()).ToArray();
  
                      writer.Write(distinctData);
                  }
  
                  Log.Trace("Finish data download. Press any key to continue..");
  
              }
              catch (Exception err)
              {
                  Log.Error(err);
                  Log.Trace(err.Message);
                  Log.Trace(err.StackTrace);
              }
              Console.ReadLine();
          }
      }
  }
  