SafeDispatch/SipComponent/SipClientClassSD.cs

using Independentsoft.Sip;
using Independentsoft.Sip.Sdp;
using SocketIOComponent;
using System;
using System.Collections.Generic;
using System.Net;
using System.Net.Sockets;
using System.Threading.Tasks;
using SipComponent.Linx;

namespace SipComponent
{
    /// <summary>
    /// Class used to make SD talk to Linx using Adi's protocol
    /// <para>Accepts more than one sip call at a time</para>
    /// </summary>
    public class SipClientClassSD : SipClientClass
    {

        #region Fields

        private Dictionary<string, CallInfo> _linxDevicesToRespondTo = new Dictionary<string, CallInfo>();
        private Dictionary<string, CallInfo> _linxDevicesToCall = new Dictionary<string, CallInfo>();
        private object _lockerCallingLinx = new object();
        private object _lockerCalledLinx = new object();
        private Dictionary<string, TimerWithTag<LinxIDInfo>> _hangTimeTimers = new Dictionary<string, TimerWithTag<LinxIDInfo>>();
        private object _lockerlinxGroups = new object();
        private HashSet<int> _linxGroupsInDialogWith = new HashSet<int>();
        /// <summary>
        /// Simulated hangTime duration, in ms
        /// </summary>
        private readonly int _hangTimeDuration = 3000;

        // Socket.IO class
        private SocketIOClass _socketIOClass = null;
        private bool _sendArsOnOff = true;

        // Random for sending seqIDs and other things....
        private Random _rand = new Random();

        // Sip message generator
        private LinxSipMessageGenerator _sipMessageGenerator = new LinxSipMessageGenerator();

        

        #endregion

        // constructor
        /// <summary>
        /// Constructor for the SipClientClassSD
        /// </summary>
        /// <param name="sipDomain">domain name, name or IP address of sip server</param>
        /// <param name="sipDomainPort">port number of the sip server</param>
        /// <param name="localSipPort">port number of the local computer used for sip protocol</param>
        /// <param name="userName">user name on the sip server</param>
        /// <param name="password">password on the sip server</param>
        /// <param name="registrationInterval">interval to send sip registration requests. Value is in seconds</param>
        /// <param name="bufferMiliseconds">Miliseconds for the buffer that stores the received voice packets</param>
        /// <param name="requestTimeout">Number of ms to wait before the sip request times out</param>
        /// <param name="socketIOport">port number use for socket.IO</param>
        /// <param name="localIPAddress">Local Ip adress. If not specified, the class will search for a local ip on the same network with the sip server ip</param>
        /// <param name="sendArsOnOff">True to send ars on on creation and off when calling Stop()</param>
        public SipClientClassSD(string sipDomain, int sipDomainPort, int localSipPort, string userName, string password, int registrationInterval, int bufferMiliseconds,
            int requestTimeout, int socketIOport, string localIPAddress = null, bool sendArsOnOff = true) : 
            base(sipDomain, sipDomainPort, localSipPort, userName, password, registrationInterval, bufferMiliseconds, requestTimeout, localIPAddress)
        {
            

            // Socket IO
            this._socketIOClass = new SocketIOClass($"ws://{sipDomain}:{socketIOport}");
            this._socketIOClass.PrivateCallRequestReceived += _socketIOClass_PrivateCallRequestReceived;
            this._socketIOClass.GroupCallRequestReceived += _socketIOClass_GroupCallRequestReceived;
            this._socketIOClass.SmsReceived += _socketIOClass_SmsReceived;

            // Send ARS ON after 1 second since the socketIOClass instantiation
            _sendArsOnOff = sendArsOnOff;
            if (_sendArsOnOff)
                Task.Delay(1000).ContinueWith(t => { this._socketIOClass.SendArs(new ArsInfo(true, "0", userName)); });
        }


        #region Public Members

        /// <summary>
        /// Gets or sets a value indicating if the Asterisk sends sms confirmations on delivery
        /// <para>Default value is false</para>
        /// </summary>
        public bool SmsConfirmationFromAsterisk
        {
            get { return base._smsConfirmationFromServer; }
            set { _smsConfirmationFromServer = true; }
        }

        /// <summary>
        /// Send Invite to a Linx android Device
        /// </summary>
        /// <param name="linxID">Linx ID to call</param>
        public void Invite(string linxID)
        {
            // Send private call request on socket.IO
            PrivateCallInfo callInfo = new PrivateCallInfo(int.Parse(this.UserName), int.Parse(linxID), true);
            _linxDevicesToCall[linxID] = callInfo;
            _socketIOClass.SendPrivateCallRequest(callInfo);
            // send invite
            base.Invite(linxID, TypeOfCall.FULL_DUPLEX);
        }

        /// <summary>
        /// Send Invite to a linx group, using socket.IO signalling
        /// </summary>
        /// <param name="linxGroupID">Linx group to call</param>
        public new void InviteGroup(string linxGroupID)
        {
            // Send group call request on socket.IO
            GroupCallInfo callInfo = new GroupCallInfo(int.Parse(this.UserName), int.Parse(linxGroupID), true);
            _linxDevicesToCall[linxGroupID] = callInfo;
            _socketIOClass.SendGroupCallRequest(callInfo);
            // send invite
            base.Invite(linxGroupID, TypeOfCall.FULL_DUPLEX);
        }

        /// <summary>
        /// Method used to send Gps Request to a Linx device
        /// </summary>
        /// <param name="idToRequestGps">The sip id to send the gps request</param>
        /// <param name="seqID">The sequence id</param>
        public void SendGPSRequest(string idToRequestGps, string seqID)
        {
            base.SendLinxGpsRequest(idToRequestGps, seqID);
        }

        /// <summary>
        /// Sends a group sms on socket IO 
        /// </summary>
        /// <param name="fromScID">SC ID of the sender</param>
        /// <param name="sipGroupID">The sip group ID</param>
        /// <param name="groupScID">SC ID of the group</param>
        /// <param name="text">The text</param>
        public void SendGroupSms(int fromScID, int sipGroupID, int groupScID, string text)
        {
            _socketIOClass.SendSms(new SmsInfo(_rand.Next(300, 1000).ToString(), UserName, fromScID.ToString(), sipGroupID.ToString(), groupScID.ToString(), text, true));
        }

        #endregion

        #region Abstract Members Implementation

        internal override RTPListener2 CreateRTPListener(UdpClient udpClient, bool initiatedByMe, int bufferMiliseconds, int sipIdInDialogWith, bool isGroupCall, TypeOfCall typeOfCall)
        {
            // Check if is private or group call
            CallInfo callInfo = null;
            string groupID = null;
            if (_linxDevicesToRespondTo.ContainsKey(sipIdInDialogWith.ToString()))
                callInfo = _linxDevicesToRespondTo[sipIdInDialogWith.ToString()];
            else if (_linxDevicesToCall.ContainsKey(sipIdInDialogWith.ToString()))
                callInfo = _linxDevicesToCall[sipIdInDialogWith.ToString()];
            if (callInfo is GroupCallInfo)
            {
                groupID = ((GroupCallInfo)callInfo).ToGroupSipID.ToString();
            }

            return new RTPListenerLinx(udpClient, initiatedByMe, bufferMiliseconds, sipIdInDialogWith, typeOfCall, groupID);
        }

        internal override RTPSender2 CreateRTPSender(UdpClient udpClient, int audioBitrate, IPEndPoint iPEndPoint, int dmrSourceID, int dmrDestinationID, bool initiatedByMe, TypeOfCall typeOfCall, 
            RtpCallType halfDuplexCallType = RtpCallType.Private)
        {
            return new RTPSender2(udpClient, audioBitrate, iPEndPoint, dmrSourceID, dmrDestinationID, initiatedByMe, typeOfCall);
        }

        internal override SipMessageGenerator SipMessageGenerator
        {
            get
            {
                return _sipMessageGenerator;
            }
        }

        #endregion

        #region Virtual Members Implementation

        /// <summary>
        /// Method used to return the type of call from a received invite
        /// </summary>
        /// <param name="receivedInvite">The received invite</param>
        /// <returns>The requested type of call</returns>
        protected override TypeOfCall GetTypeOfCall(Request receivedInvite)
        {
            return TypeOfCall.FULL_DUPLEX;
        }

        /// <summary>
        /// Method used to return the type of call from a received Session description 
        /// </summary>
        /// <param name="sdp">The received session description</param>
        /// <returns>The requested type of call</returns>
        protected override TypeOfCall GetTypeOfCall(SessionDescription sdp)
        {
            return TypeOfCall.FULL_DUPLEX;
        }

        /* Part that handles Sip message signalling

        /// <summary>
        /// Function that processes all the received Sip Message requests
        /// </summary>
        /// <param name="sipMessageRequest">The Sip Message request</param>
        /// <param name="senderID">The ID of the sender</param>
        protected override void ProcessReceivedSipMessage(Request sipMessageRequest, string senderID)
        {
            string requestBody;
            if ((requestBody = sipMessageRequest.Body) != null)
            {
                if (requestBody == _halfDuplexIdentifier)
                {
                    lock (_locker)
                    {
                        _linxDevicesToRespondTo.Add(senderID);
                    }
                    return;
                }
            }
            base.ProcessReceivedSipMessage(sipMessageRequest, senderID);
        }

    */

        /// <summary>
        /// Method used to decide if the app is ringing or is sending Busy response to sender
        /// <para>Default behaviour is to ring (sends Ringing response)</para>
        /// </summary>
        /// <param name="receivedInvite">The received invite</param>
        /// <param name="senderSipId">The sender of the invite</param>
        /// <returns>True to send Ringing response, false to send Busy Here</returns>
        protected override bool SendResponseRinging(Request receivedInvite, string senderSipId)
        {
            // 1. Check if the caller is the one that has send / received the sip message. Else send busy
            lock (_lockerCallingLinx)
            {
                if (_linxDevicesToRespondTo.ContainsKey(senderSipId))
                {
                    CallInfo callInfo = _linxDevicesToRespondTo[senderSipId];
                    if (callInfo.FromSipID.ToString() == senderSipId)
                    {
                        if (callInfo.IsPTT)
                        {
                            GroupCallInfo groupCallInfo = callInfo as GroupCallInfo;
                            if (groupCallInfo == null)
                            {
                                // this is a private call request
                                return true;
                            }
                            else
                            {
                                // call is group call
                                // reject a group call if already in dialog with that group  
                                bool reject = false;
                                lock (_lockerlinxGroups)
                                {
                                    if (!_linxGroupsInDialogWith.Contains(groupCallInfo.ToGroupSipID))
                                        _linxGroupsInDialogWith.Add(groupCallInfo.ToGroupSipID);
                                    else
                                        reject = true;
                                }
                                if (reject)
                                {
                                    OnError(new ErrorEventArgs(UserName, senderSipId, $"Will reject group invite from {senderSipId} because I'm already in group call with {groupCallInfo.ToGroupSipID} "));
                                    return false;
                                }
                                else
                                    return true;
                            }
                        }
                        else
                        {
#if DEBUG
                            Console.WriteLine($"Will send busy to {senderSipId} because he initiated a full duplex call");
#endif
                            return false;
                        }
                    }
                    else
                    {
#if DEBUG
                        Console.WriteLine($"Will send busy to {senderSipId} because he did not send request for ptt");
#endif
                        OnError(new ErrorEventArgs(UserName, senderSipId, $"{senderSipId} did not send request for ptt"));
                        return false;
                    }
                }
                else
                {
#if DEBUG
                    Console.WriteLine($"Will send busy to {senderSipId} because he did not send request for ptt");
#endif
                    OnError(new ErrorEventArgs(UserName, senderSipId, $"{senderSipId} did not send request for ptt"));
                    return false;
                }
            }

        }

        /// <summary>
        /// This is the method that raises the DialogClosed event
        /// </summary>
        /// <param name="e">Data for the DialogClosed event</param>
        /// <remarks>Do not forget to call the base version when overrinding, 
        /// <para>otherwize the DialogClosed Event will not fire</para>
        /// </remarks>
        protected override void OnDialogClosed(DialogClosedEventArgs e)
        {
            CallInfo closingCallInfo = null;
            if (_linxDevicesToCall.ContainsKey(e.SipIDinDialogWith))
                closingCallInfo = _linxDevicesToCall[e.SipIDinDialogWith];
            else if (_linxDevicesToRespondTo.ContainsKey(e.SipIDinDialogWith))
                closingCallInfo = _linxDevicesToRespondTo[e.SipIDinDialogWith];

            string idInHangtime = "";
            GroupCallInfo groupCallInfo = closingCallInfo as GroupCallInfo;
            if (groupCallInfo != null)
            {
                // group call
                idInHangtime = groupCallInfo.ToGroupSipID.ToString();
                // Remove entry from linx groups dictionary
                lock (_lockerlinxGroups)
                {
                    _linxGroupsInDialogWith.Remove(groupCallInfo.ToGroupSipID);
                }
            }
            else
            {
                // private call
                idInHangtime = e.SipIDinDialogWith;
            }

            // Remove sip id from list of id's that sent request on socket.IO
            lock (_lockerCallingLinx)
            {
                if (_linxDevicesToRespondTo.ContainsKey(e.SipIDinDialogWith))
                    _linxDevicesToRespondTo.Remove(e.SipIDinDialogWith);
                else if (_linxDevicesToCall.ContainsKey(e.SipIDinDialogWith))
                    _linxDevicesToCall.Remove(e.SipIDinDialogWith);
            }

            // Create hangtime timer for each sip id
            TimerWithTag<LinxIDInfo> timer;
            if (_hangTimeTimers.ContainsKey(idInHangtime))
            {
                timer = _hangTimeTimers[idInHangtime];
            }
            else
            {
                timer = new TimerWithTag<LinxIDInfo>(_hangTimeDuration, new LinxIDInfo(e.SipIDinDialogWith, idInHangtime != e.SipIDinDialogWith ? idInHangtime : null));
                timer.AutoReset = false;
                timer.Elapsed += TimerHangtime_Elapsed;
                _hangTimeTimers.Add(idInHangtime, timer);
            }
            timer.Start();

            LinxDialogClosedEventArgs ev = new LinxDialogClosedEventArgs(
                e.SipIDinDialogWith, e.SipIDwhoClosed, e.Reason,
                idInHangtime != e.SipIDinDialogWith ? idInHangtime : null);

            this.OnLinxDialogClosed(ev);
        }

        /// <summary>
        /// This is the method that raises the DialogCreated event
        /// </summary>
        /// <param name="e">Data for the DialogCreatedEvent</param>
        /// <remarks>Do not forget to call the base version when overrinding, 
        /// <para>otherwize the DialogCreated Event will not fire</para>
        /// </remarks>
        protected override void OnDialogCreated(DialogCreatedEventArgs e)
        {
            
            string linxID = (e.FromID == base.UserName ? e.ToID : e.FromID);
            bool isGroupCall = false;
            string groupID = null;
            CallInfo callInfo = null;

            if (_linxDevicesToRespondTo.ContainsKey(linxID))
                callInfo = _linxDevicesToRespondTo[linxID];
            else if (_linxDevicesToCall.ContainsKey(linxID))
                callInfo = _linxDevicesToCall[linxID];

            // Check if is private or group call
            if (callInfo is GroupCallInfo)
            {
                isGroupCall = true;
                linxID = groupID = ((GroupCallInfo)callInfo).ToGroupSipID.ToString();
            }
      
            // Check if the Linx was in in hangtime, to stop the timer
            if (_hangTimeTimers.ContainsKey(linxID))
            {
                _hangTimeTimers[linxID].Stop();
            }
           
            LinxDialogCreatedEventArgs ev = new LinxDialogCreatedEventArgs(
                e.ToID, e.FromID, e.TypeOfDialog, isGroupCall, groupID);

            this.OnLinxDialogCreated(ev);
        }

        /// <summary>
        /// This is the method that raises the VoiceReceived event
        /// </summary>
        /// <param name="e">Data for the VoiceReceived event</param>
        /// <remarks>Do not forget to call the base version when overrinding,
        /// <para>otherwise the VoiceReceived Event will not fire</para>
        /// </remarks>
        protected override void OnVoiceReceived(AudioEventArgs e)
        {
            LinxAudioEventArgs ev = (LinxAudioEventArgs)e;
            OnLinxVoiceReceived(ev);
            
        }

        /// <summary>
        /// Stops registration by sending unregister request to the sip server
        /// <para>Releases all the used resources</para>
        /// <para>Disconnects from the socket.IO server</para>
        /// </summary>
        public override void Stop(bool async = true)
        {
            // Send ARS OFF and disconect from socket IO
            if (_sendArsOnOff)
                _socketIOClass.SendArs(new ArsInfo(false, "0", UserName));
            _socketIOClass.Disconect();
            base.Stop();
        }

        #endregion

        #region Events

        private object locker = new object();
        /// <summary>
        /// Occurs when a GPS report is received from a Linx device
        /// </summary>
        public event EventHandler<LinxGpsDataEventArgs> GpsReportReceived
        {
            add
            {
                lock (locker)
                {
                    base.LinxGpsReportReceived += value;
                }
            }
            remove
            {
                lock (locker)
                {
                    base.LinxGpsReportReceived -= value;
                }
            }
        }

        private object locker1 = new object();
        /// <summary>
        /// Occurs when an emergency alarm is received from a Linx device
        /// </summary>
        public event EventHandler<LinxEmergencyAlarmReceivedEventArgs> EmergencyAlarmReceived
        {
            add
            {
                lock (locker1)
                {
                    base.LinxEmergencyAlarmReceived += value;
                }
            }
            remove
            {
                lock (locker1)
                {
                    base.LinxEmergencyAlarmReceived -= value;
                }
            }
        }

        private object locker8 = new object();
        /// <summary>
        /// Occurs when an Ars command is received from a Linx device
        /// </summary>
        public event EventHandler<Linx.ArsReceivedEventArgs> ArsReceived
        {
            add
            {
                lock (locker8)
                {
                    base.LinxArsReceived += value;
                }
            }
            remove
            {
                lock (locker8)
                {
                    base.LinxArsReceived -= value;
                }
            }
        }

        /// <summary>
        /// Occurs when hangtime is ended
        /// </summary>
        public event EventHandler<HangtimeEndedEventArgs> HangtimeEnded;

        private void OnHangtimeEnded(HangtimeEndedEventArgs e)
        {
            HangtimeEnded?.Invoke(this, e);


        }

        /// <summary>
        /// Occurs when a voice session (a dialog) has been established
        /// </summary>
        public new event EventHandler<LinxDialogCreatedEventArgs> DialogCreated;

        private void OnLinxDialogCreated(LinxDialogCreatedEventArgs e)
        {
            DialogCreated?.Invoke(this, e);
        }

        /// <summary>
        /// Occurs when a voice session (a dialog) is closed
        /// </summary>
        public new event EventHandler<LinxDialogClosedEventArgs> DialogClosed;

        private void OnLinxDialogClosed(LinxDialogClosedEventArgs e)
        {
            DialogClosed?.Invoke(this, e);
        }

        /// <summary>
        /// Ocurs when a voice buffer is received from a sip id
        /// </summary>
        public new event EventHandler<LinxAudioEventArgs> VoiceReceived;

        private void OnLinxVoiceReceived(LinxAudioEventArgs e)
        {
            VoiceReceived?.Invoke(this, e);
        }


        /// <summary>
        /// Occurs when a group sms is received on socketIO
        /// </summary>
        public event EventHandler<SocketIOSmsEventArgs> GroupSmsReceived;

        private void OnGroupSmsReceived(SocketIOSmsEventArgs e)
        {
            // New pattern for triggering events
            GroupSmsReceived?.Invoke(this, e);
        }

        #endregion

        #region Private Methods

        private void TimerHangtime_Elapsed(object sender, System.Timers.ElapsedEventArgs e)
        {
            TimerWithTag<LinxIDInfo> timer = (TimerWithTag<LinxIDInfo>)sender;
            LinxIDInfo linxIDifo = timer.Tag;
            OnHangtimeEnded(new HangtimeEndedEventArgs(linxIDifo.SipID, linxIDifo.GroupID));
        }

        #region SocketIO Event Handlers

        private void _socketIOClass_PrivateCallRequestReceived(object sender, PrivateCallRequestReceivedEventArgs e)
        {
            PrivateCallInfo callInfo = e.CallInfo;
            if (callInfo.ToSipID.ToString() == this.UserName && callInfo.IsPTT)
            {
                lock (_lockerCallingLinx)
                {
                    _linxDevicesToRespondTo[callInfo.FromSipID.ToString()] = callInfo;
                }
            }
#if DEBUG
            Console.WriteLine($"Private call request received by sip {UserName}: {e.CallInfo.ToString()}");
#endif
        }

        private void _socketIOClass_GroupCallRequestReceived(object sender, GroupCallRequestReceivedEventArgs e)
        {
            GroupCallInfo callInfo = e.CallInfo;
            if (callInfo.IsPTT)
            {
                lock (_lockerCallingLinx)
                {
                    _linxDevicesToRespondTo[callInfo.FromSipID.ToString()] = callInfo;
                }
            }
#if DEBUG
            Console.WriteLine($"Group call request received by sip {UserName}: {e.CallInfo.ToString()}");
#endif
        }

        private void _socketIOClass_SmsReceived(object sender, SmsReceivedEventArgs e)
        {
            SmsInfo smsInfo = e.SmsInfo;
#if DEBUG
            Console.WriteLine($"Group sms received by sip {UserName}: {smsInfo}");
#endif
            if(smsInfo.IsGroup)
                // Fire event
                OnGroupSmsReceived(new SocketIOSmsEventArgs(smsInfo.SeqID, smsInfo.FromSipID, smsInfo.ToSipID, smsInfo.Message, smsInfo.IsGroup));
        }

        #endregion

        #endregion


        struct LinxIDInfo
        {
            public string SipID { get; private set; }
            public bool IsGroup {
                get {
                    return GroupID != null;
                }
            }

            public string GroupID { get; private set; }


            public LinxIDInfo(string sipID, string groupID = null)
            {
                SipID = sipID;
                GroupID = groupID;
            }
        }
    }

    /// <summary>
    /// Provides data for the DialogCreated event
    /// </summary>
    public class LinxDialogCreatedEventArgs : DialogCreatedEventArgs
    {
        /// <summary>
        /// Gets the group sip id if group call, otherwise is null 
        /// </summary>
        public string GroupID { get; private set; }
        internal LinxDialogCreatedEventArgs(string toID, string fromID, TypeOfCall typeOfDialog, bool isGroupCall, string groupID = null):
            base(toID, fromID, typeOfDialog, isGroupCall)
        {
            GroupID = groupID;
        }
    }

    /// <summary>
    /// Provides data for the DialogClosedEvent
    /// </summary>
    public class LinxDialogClosedEventArgs : DialogClosedEventArgs
    {
        /// <summary>
        /// Gets the group id if group call, otherwise is null
        /// </summary>
        public string GroupID { get; private set; }

        internal LinxDialogClosedEventArgs(string sipIDinDialogWith, string sipIDWhoClosed, DialogClosedReason reason, string groupID = null) : 
            base(sipIDinDialogWith, sipIDWhoClosed, groupID != null, reason)
        {
            GroupID = groupID;
        }
    }

    /// <summary>
    /// Provides data for the HangtimeEnded Event
    /// </summary>
    public class HangtimeEndedEventArgs : SipEventArgs
    {
        /// <summary>
        /// Returns true for group call, false for private call
        /// </summary>
        public bool IsGroupCall {
            get {
                return GroupID != null;
            }
        }

        /// <summary>
        /// Gets the group id if group call, otherwise is null
        /// </summary>
        public string GroupID { get; private set; }

        internal HangtimeEndedEventArgs(string sipIDinDialogWith, string groupID = null) : base(sipIDinDialogWith)
        {
            GroupID = groupID;
        }
    }

    /// <summary>
    /// Provides data for the VoiceReceived event
    /// </summary>
    public class LinxAudioEventArgs : AudioEventArgs
    {
        /// <summary>
        /// Gets the group id if group call, otherwise is null
        /// </summary>
        public string GroupID { get; private set; }
        internal LinxAudioEventArgs(byte[] data, int linxSourceId, string groupID = null) :
            base(data, linxSourceId, 
                groupID != null ? int.Parse(groupID) : linxSourceId)
        {
            GroupID = groupID;
        }
    }

    /// <summary>
    /// Provides data for the GroupSmsReceived event
    /// </summary>
    public class SocketIOSmsEventArgs : EventArgs
    {

        /// <summary>
        /// SequenceID
        /// </summary>
        public string SeqID { get; private set; }

        /// <summary>
        /// Sip ID that sends the sms
        /// </summary>
        public string FromSipID { get; private set; }

        /// <summary>
        /// Destination group sip ID 
        /// </summary>
        public string ToSipID { get; private set; }


        /// <summary>
        /// The message
        /// </summary>
        public string Message { get; private set; }

        public bool IsGroup { get; private set; }

        internal SocketIOSmsEventArgs(string seqID, string fromSipID, string toSipID, string message, bool isGroup)
        {
            this.SeqID = seqID;
            this.FromSipID = fromSipID;
            this.ToSipID = toSipID;
            this.Message = message;
            this.IsGroup = isGroup;
        }
    }

    /// <summary>
    /// Provides data for the SocketIoSmsAckReceived event
    /// </summary>
    public class SocketIoSmsAckEventArgs : EventArgs
    {
        /// <summary>
        /// Seq id of the sms
        /// </summary>
        public string SeqID { get; private set; }

        /// <summary>
        /// Sip ID for the ack
        /// </summary>
        public string AckBySipID { get; private set; }

        internal SocketIoSmsAckEventArgs(string seqID, string ackBySipID)
        {
            this.SeqID = seqID;
            this.AckBySipID = ackBySipID;
        }


    }
}