public List<MessageInfo> GetMessageHistoryForSpecifiedChatBetweenDates(string chatname, DateTime first, DateTime second)
{
if (first > second)
{
DateTime tmpdt = first;
first = second;
second = tmpdt;
}
List<MessageInfo> messageshistory = new List<MessageInfo>();
var history = from h in this._context.History
join c in this._context.Chat on h.IdChat_Chat equals c.IdChat
join u in this._context.ChatUser on h.IdUser_ChatUser equals u.IdUser
where c.ChatTitle == chatname && h.MessageDate >= first && h.MessageDate <= second
select new
{
Username = u.UserName,
Message = h.Message,
MsgDate = h.MessageDate,
MsgId = h.IdHistory,
ChatName = c.ChatTitle
};
foreach (var msg in history)
{
MessageInfo mi = new MessageInfo();
mi.userName = msg.Username;
mi.message = msg.Message;
mi.messageDate = msg.MsgDate;
mi.messageId = msg.MsgId;
mi.chatTitle = msg.ChatName;
messageshistory.Add(mi);
}
return messageshistory;
}
public List<MessageInfo> GetNewMessages(int lastMsgId, string chatName)
{
List<MessageInfo> newMessages = new List<MessageInfo>();
var newmsgs = from h in this._context.History
join c in this._context.Chat on h.IdChat_Chat equals c.IdChat
join u in this._context.ChatUser on h.IdUser_ChatUser equals u.IdUser
where h.IdHistory > lastMsgId && c.ChatTitle == chatName
select new
{
Username = u.UserName,
Message = h.Message,
MsgDate = h.MessageDate,
MsgId = h.IdHistory,
ChatName = c.ChatTitle
};
foreach (var msg in newmsgs)
{
MessageInfo nm = new MessageInfo();
nm.userName = msg.Username;
nm.message = msg.Message;
nm.messageDate = msg.MsgDate;
nm.messageId = msg.MsgId;
nm.chatTitle = msg.ChatName;
newMessages.Add(nm);
}
return newMessages;
}
public List<MessageInfo> GetMessageHistoryForSpecifiedChatAndUser(string chatname, string username)
{
List<MessageInfo> messageshistory = new List<MessageInfo>();
var history = from h in this._context.History
join c in this._context.Chat on h.IdChat_Chat equals c.IdChat
join u in this._context.ChatUser on h.IdUser_ChatUser equals u.IdUser
where c.ChatTitle == chatname && u.UserName == username
select new
{
Username = u.UserName,
Message = h.Message,
MsgDate = h.MessageDate,
MsgId = h.IdHistory,
ChatName = c.ChatTitle
};
foreach (var msg in history)
{
MessageInfo mi = new MessageInfo();
mi.userName = msg.Username;
mi.message = msg.Message;
mi.messageDate = msg.MsgDate;
mi.messageId = msg.MsgId;
mi.chatTitle = msg.ChatName;
messageshistory.Add(mi);
}
return messageshistory;
}
