//---------------------------------------------------------------------
/// <summary>
/// Notify, send a message.
/// Execute all actions susbscribed under the msgCode.
///
/// Return the number of actions notifications executed, or -1 if an error occurs.
/// If no subscriber is found return 0.
/// </summary>
/// <param name="messengerName"></param>
/// <param name="obj"></param>
public int Notify <T>(object whoNotify, string msgCode, T obj)
{
_lastErrCode = MessengerErrCode.None;
// check params
if (whoNotify == null)
{
_lastErrCode = MessengerErrCode.ObjNotifyIsNull;
return(-1);
}
// the syntax code must be ok
if (!IsMsgCodeSyntaxOk(msgCode))
{
_lastErrCode = MessengerErrCode.MsgCodeSyntaxWrong;
return(-1);
}
// find the CodeListAction
if (!_dictMsgCodeListAction.ContainsKey(msgCode))
{
_lastErrCode = MessengerErrCode.MsgCodeNotFound;
// not an error
return(0);
}
// msg code already exists, get it
MsgCodeListAction msgCodeListAction = _dictMsgCodeListAction[msgCode];
// execute all actions presents
int notifCount = 0;
List <RecipientObjAction> listRemoveRecipientAction = new List <RecipientObjAction>();
foreach (RecipientObjAction recipientAction in msgCodeListAction.GetListRecipientObjAction())
{
// check that the object already exists (with the weak reference)
if (recipientAction.Recipient != null)
{
// the type of the notify parameter should match the type of the param of the registered recipient
if (recipientAction.ActionType == typeof(T))
{
// ok, execute the action
((Action <T>)recipientAction.ActionT)(obj);
notifCount++;
}
}
else
{
// the recipient is now null, unregister it
listRemoveRecipientAction.Add(recipientAction);
}
}
//now remove all unregistered recipient
while (listRemoveRecipientAction.Count > 0)
{
msgCodeListAction.RemoveRecipientObjAction(listRemoveRecipientAction[0]);
listRemoveRecipientAction.RemoveAt(0);
}
// no recipient-action attached to the msgCode, remove the msgCode
if (msgCodeListAction.Count == 0)
{
RemoveMsgCodeListAction(msgCodeListAction);
}
return(notifCount);
}
