MOBILE_API/PushNotification/FcmNotifier.cs

using Common;
using log4net;
using System;
using System.Configuration;
using System.IO;
using System.Net;
using System.Text;
using System.Web.Script.Serialization;

namespace PushNotification
{
    public static class FcmNotifier
    {
        private static readonly ILog Log = LogManager.GetLogger(typeof(FcmNotifier));

        public static void Notify(string fcmToken, string body, string title, bool isGroup = false, object data = null)
        {
            if (string.IsNullOrEmpty(fcmToken))
            {
                Log.Debug("Fcm device id is empty: " + fcmToken);
                return;
            }
            PushNotificationPayload payload = new PushNotificationPayload();
            payload.to = isGroup == true ? "/topics/" + fcmToken : fcmToken;
            payload.notification = new Notification { body = body, title = title };
            payload.data = data;

            try
            {
                Log.Debug("Server is firing push notification" + fcmToken);

                WebRequest tRequest = WebRequest.Create(ConfigurationManager.AppSettings["GoogleFcm"].ToString());
                tRequest.Method = "POST";
                tRequest.ContentType = "application/json";

                var serializer = new JavaScriptSerializer();
                var json = serializer.Serialize(payload);
                Byte[] byteArray = Encoding.UTF8.GetBytes(json);
                tRequest.Headers.Add(string.Format("Authorization: key={0}", ConfigurationManager.AppSettings["FcmAuthorizationHeader"].ToString()));
                tRequest.Headers.Add(string.Format("Sender: id={0}", ConfigurationManager.AppSettings["fcmSenderId"].ToString()));
                tRequest.ContentLength = byteArray.Length;
                using (Stream dataStream = tRequest.GetRequestStream())
                {
                    dataStream.Write(byteArray, 0, byteArray.Length);
                    using (WebResponse tResponse = tRequest.GetResponse())
                    {
                        using (Stream dataStreamResponse = tResponse.GetResponseStream())
                        {
                            using (StreamReader tReader = new StreamReader(dataStreamResponse))
                            {
                                String sResponseFromServer = tReader.ReadToEnd();
                                string str = sResponseFromServer;

                               // Log.Info($"Google FCM Api call success: {str}");
                                Log.Info(serializer.Serialize( new FireBaseLogResponseViewModel() { Response = str, Data = json }));

                            }
                        }
                    }
                }
            }
            catch (Exception ex)
            {
                Log.Error(ex.Message, ex);
                Log.ErrorFormat("Google FCM Api call failed Exception {0}:", ex.Message);
            }
        }



    }
}