/// <summary>
/// Для создания следующего сохранённого состояния
/// </summary>
private DatabaseState(int index, IList <FlowState> states, DbContext db, UserInChat userInChatPersistance)
{
_index = index;
_userStates = states;
_userInChatPersistance = userInChatPersistance;
_db = db;
CurrentFlowState = states[index];
//это можно конечно сделать выше, но сюда все равно эти параметры передаются
//если в базе есть следующий, то читаем его в Next
var nextIndex = index + 1;
if (nextIndex < states.Count)
{
_nextState = new DatabaseState(nextIndex, states, db, userInChatPersistance);
}
}
private static object _chatCreationLocker = new object();//todo: low I don't like it's static, but i don't understand now where should lock be kept
public static DatabaseState GetRootState(BotFlow.Persistance.UserInChat userInChat, string connectionString)
{
var db = new DbContext(connectionString);
var userInChatPersistance = db.UsersInChat.GetUserInChatPersistance(userInChat);
List <FlowState> flowStates;
if (userInChatPersistance == null)
{
var userId = userInChat.UserId;
uint lastLanguage = 0;
if (db.UsersInChat.Any())
{
var maxId = db.UsersInChat.Max(uic => uic.Id);
lastLanguage = db.UsersInChat.Single(uc => uc.Id == maxId).ChatInTelegram.LanguageIndex;
}
lock (_chatCreationLocker)//todo: low Not the fastest lock
{
var chatInTelegram = db.ChatInTelegrams.ById(userInChat.ChatId) ?? new ChatInTelegram
{
Id = userInChat.ChatId,
LanguageIndex = /*todo: low I don't understand where it should be in this case*/
LocalizedStrings.Language = lastLanguage
};
var userInTelegram = db.UserInTelegrams.ById(userId) ?? new UserInTelegram
{
Id = userId,
};
userInChatPersistance = new UserInChat
{
ChatInTelegram = chatInTelegram,
UserInTelegram = userInTelegram,
};
db.Add(userInChatPersistance);
var firstFlowState = new FlowState
{
UserInChat = userInChatPersistance,
FlowStateId = string.Empty
};
db.Add(firstFlowState);
userInChatPersistance.FlowStates.Add(firstFlowState);
db.SaveChanges();
db.Refresh(RefreshMode.OverwriteChangesFromStore, userInChat);
flowStates = new List <FlowState> {
firstFlowState
};
}
}
else
{
flowStates = new List <FlowState>(userInChatPersistance.FlowStates.ToArray());
//предполагаем, что у созданного сходу есть один стейт
}
return(new DatabaseState(0, flowStates, db, userInChatPersistance));
}