public static int CountUnreadMessages()
{
ConversationPreviewsModel model = MessageController.GetConversationPreviews();
int unreadMessages = 0;
foreach (ConversationPreviewModel m in model.Conversations)
{
if (m.LastMessage.Receiver.Id == System.Web.HttpContext.Current.User.Identity.GetUserId() && !m.LastMessage.isRead)
{
unreadMessages++;
}
}
return(unreadMessages);
}
public static ConversationPreviewsModel GetConversationPreviews()
{
var context = new AppDbContext();
Message lastMessage = null;
List <Message> tempList = new List <Message>();
AppUser currentUser = context.Users.Find(System.Web.HttpContext.Current.User.Identity.GetUserId());
ConversationPreviewsModel model = new ConversationPreviewsModel()
{
Conversations = new List <ConversationPreviewModel>()
};
HashSet <string> interlocutorsIds = new HashSet <string>();
//create a list of interlocutors
foreach (Message message in currentUser.SentMessages.Concat(currentUser.ReceivedMessages))
{
if (message.ReceiverId == currentUser.Id)
{
interlocutorsIds.Add(message.SenderId);
}
else
{
interlocutorsIds.Add(message.ReceiverId);
}
}
//find last sent or received message in conversation
foreach (string interlocutorId in interlocutorsIds)
{
tempList = currentUser.SentMessages.Concat(currentUser.ReceivedMessages).Where(x => x.ReceiverId == interlocutorId || x.SenderId == interlocutorId).OrderBy(x => x.SendDate).ToList();
lastMessage = tempList.Last();
model.Conversations.Add(new ConversationPreviewModel()
{
Interlocutor = context.Users.Find(interlocutorId),
LastMessage = lastMessage
});
}
return(model);
}
