/// <summary>
/// Determines whether two messages are part of the same concatenated message.
/// </summary>
/// <param name="pdu1">The first message to compare.</param>
/// <param name="pdu2">The second message to compare.</param>
/// <returns>true if both messages appear to belong to the same concatenated message, false otherwise.</returns>
/// <remarks>
/// <para>This comparison is supported for <see cref="T:GSMCommunication.PDUDecoder.SmsSubmitPdu" /> and <see cref="T:GSMCommunication.PDUDecoder.SmsDeliverPdu" /> objects.
/// For all other objects, this comparison always returns false.</para>
/// <para>For <see cref="T:GSMCommunication.PDUDecoder.SmsSubmitPdu" /> objects, the <see cref="P:GSMCommunication.PDUDecoder.SmsSubmitPdu.DestinationAddress" />,
/// <see cref="P:GSMCommunication.PDUDecoder.SmsSubmitPdu.DestinationAddressType" /> and <see cref="P:GSMCommunication.PDUDecoder.SmartMessaging.IConcatenationInfo.ReferenceNumber" /> properties are compared.</para>
/// <para>For <see cref="T:GSMCommunication.PDUDecoder.SmsDeliverPdu" /> objects, the <see cref="P:GSMCommunication.PDUDecoder.SmsDeliverPdu.OriginatingAddress" />,
/// <see cref="P:GSMCommunication.PDUDecoder.SmsDeliverPdu.OriginatingAddressType" /> and <see cref="P:GSMCommunication.PDUDecoder.SmartMessaging.IConcatenationInfo.ReferenceNumber" /> properties are compared.</para>
/// </remarks>
/// <exception cref="T:System.ArgumentNullException">pdu1 or pdu2 is null.</exception>
public static bool ArePartOfSameMessage(SmsPdu pdu1, SmsPdu pdu2)
{
if (pdu1 != null)
{
if (pdu2 != null)
{
bool flag = false;
if (pdu1 as SmsDeliverPdu == null || pdu2 as SmsDeliverPdu == null)
{
if (pdu1 is SmsSubmitPdu && pdu2 is SmsSubmitPdu)
{
SmsSubmitPdu smsSubmitPdu = (SmsSubmitPdu)pdu1;
SmsSubmitPdu smsSubmitPdu1 = (SmsSubmitPdu)pdu2;
if (smsSubmitPdu.DestinationAddress == smsSubmitPdu1.DestinationAddress && smsSubmitPdu.DestinationAddressType == smsSubmitPdu1.DestinationAddressType)
{
flag = SmartMessageDecoder.HaveSameReferenceNumber(pdu1, pdu2);
}
}
}
else
{
SmsDeliverPdu smsDeliverPdu = (SmsDeliverPdu)pdu1;
SmsDeliverPdu smsDeliverPdu1 = (SmsDeliverPdu)pdu2;
if (smsDeliverPdu.OriginatingAddress == smsDeliverPdu1.OriginatingAddress && smsDeliverPdu.OriginatingAddressType == smsDeliverPdu1.OriginatingAddressType)
{
flag = SmartMessageDecoder.HaveSameReferenceNumber(pdu1, pdu2);
}
}
return flag;
}
else
{
throw new ArgumentNullException("pdu2");
}
}
else
{
throw new ArgumentNullException("pdu1");
}
}
private static bool HaveSameReferenceNumber(SmsPdu pdu1, SmsPdu pdu2)
{
bool flag = false;
if (SmartMessageDecoder.IsPartOfConcatMessage(pdu1) && SmartMessageDecoder.IsPartOfConcatMessage(pdu2))
{
IConcatenationInfo concatenationInfo = SmartMessageDecoder.GetConcatenationInfo(pdu1);
IConcatenationInfo concatenationInfo1 = SmartMessageDecoder.GetConcatenationInfo(pdu2);
if (concatenationInfo.ReferenceNumber == concatenationInfo1.ReferenceNumber)
{
flag = true;
}
}
return flag;
}
/// <summary>
/// Determines whether a message is part of a concatenated message.
/// </summary>
/// <param name="pdu">The message.</param>
/// <returns>true if the message is part of a concatenated message, false otherwise.</returns>
public static bool IsPartOfConcatMessage(SmsPdu pdu)
{
return SmartMessageDecoder.GetConcatenationInfo(pdu) != null;
}
/// <summary>
/// Gets the concatenation information of a message.
/// </summary>
/// <param name="pdu">The message to get the information of.</param>
/// <returns>An object implementing <see cref="T:GSMCommunication.PDUDecoder.SmartMessaging.IConcatenationInfo" />, if
/// the message is a part of a concatenated message, null otherwise.</returns>
/// <remarks>
/// <para>The returned information can be used to discover the parts of a concatenated message
/// or recombine the parts back into one message.</para>
/// </remarks>
public static IConcatenationInfo GetConcatenationInfo(SmsPdu pdu)
{
if (pdu != null)
{
IConcatenationInfo concatenationInfo = null;
if (pdu.UserDataHeaderPresent)
{
byte[] userDataHeader = pdu.GetUserDataHeader();
InformationElement[] informationElementArray = SmartMessageDecoder.DecodeUserDataHeader(userDataHeader);
InformationElement[] informationElementArray1 = informationElementArray;
int num = 0;
while (num < (int)informationElementArray1.Length)
{
InformationElement informationElement = informationElementArray1[num];
if (informationElement as IConcatenationInfo == null)
{
num++;
}
else
{
concatenationInfo = (IConcatenationInfo)informationElement;
break;
}
}
}
return concatenationInfo;
}
else
{
throw new ArgumentNullException("pdu");
}
}
