public int Add(Conversation conversation)
{
using (var context = new ChatContext())
{
try
{
/// User remapping is done here because EF didn't recognize conversation users as
/// same object as ones in the context so it created duplicate entries.
/// Atm I had no time to find a better solution.
Conversation newConversation = new Conversation();
foreach (var participant in conversation.Participants)
{
var user = context.Users.Find(participant.Id);
if (user != null)
newConversation.Participants.Add(user);
}
context.Conversations.Add(newConversation);
context.SaveChanges();
return newConversation.Id;
}
catch (Exception e)
{
Debug.WriteLine(e.StackTrace);
return -1;
}
}
}
public User Get(string username)
{
using (var context = new ChatContext())
{
try
{
var fetchedUser = context.Users.ToList().First(user => user.Username.Equals(username));
Console.WriteLine("\n User Get response: ");
Console.WriteLine("---> userId: " + fetchedUser.Id);
Console.WriteLine("---> username: "******"-----> conversation: Id " + conversation.Id + " ->" + conversation.Participants[0].Username + " - " + conversation.Participants[1].Username);
}
return fetchedUser;
}
catch (Exception e)
{
Debug.WriteLine(e.StackTrace);
return null;
}
}
}
public IEnumerable<Message> GetAllFromConversation(int conversationId)
{
using (var context = new ChatContext())
{
List<Message> messages = new List<Message>();
foreach (var message in context.Messages.ToList())
{
if (message.Conversation.Id.Equals(conversationId))
messages.Add(message);
}
return messages;
}
}
public Message Get(int messageId)
{
using (var context = new ChatContext())
{
try
{
return context.Messages.Find(messageId);
}
catch (Exception e)
{
Debug.WriteLine(e.StackTrace);
return null;
}
}
}
public Conversation Get(int conversationId)
{
using (var context = new ChatContext())
{
try
{
return context.Conversations.Find(conversationId);
}
catch (Exception e)
{
Debug.WriteLine(e.StackTrace);
return null;
}
}
}
public bool Remove(int messageId)
{
using (var context = new ChatContext())
{
try
{
context.Messages.Remove(context.Messages.Find(messageId));
context.SaveChanges();
return true;
}
catch (Exception e)
{
Debug.WriteLine(e.StackTrace);
return false;
}
}
}
public bool Add(Message message)
{
using (var context = new ChatContext())
{
try
{
context.Messages.Add(message);
context.SaveChanges();
return true;
}
catch (Exception e)
{
Debug.WriteLine(e.StackTrace);
return false;
}
}
}
public bool Update(Conversation conversation)
{
using (var context = new ChatContext())
{
try
{
context.Conversations.Remove(context.Conversations.Find(conversation.Id));
context.Conversations.Add(conversation);
context.SaveChanges();
return true;
}
catch (Exception e)
{
Debug.WriteLine(e.StackTrace);
return false;
}
}
}
public bool Add(User user, string password)
{
Credential credential = new Credential();
credential.User = user;
credential.Password = password;
using (var context = new ChatContext())
{
try
{
context.Users.Add(user);
context.Credentials.Add(credential);
context.SaveChanges();
return true;
}
catch (Exception e)
{
Debug.WriteLine(e.StackTrace);
return false;
}
}
}
public bool Remove(User user)
{
using (var context = new ChatContext())
{
try
{
var credential = context.Credentials.ToList().First(c => c.User.Username.Equals(user.Username));
context.Credentials.Remove(credential);
context.SaveChanges();
var fetchedUser = context.Users.First(u => u.Username.Equals(user.Username));
context.Users.Remove(fetchedUser);
context.SaveChanges();
return true;
}
catch (Exception e)
{
Debug.WriteLine(e.StackTrace);
return false;
}
}
}
public bool Update(User user)
{
using (var context = new ChatContext())
{
try
{
var originalUser = context.Users.Single(u => u.Username.Equals(user.Username));
originalUser.Conversations = user.Conversations;
context.SaveChanges();
return true;
}
catch (Exception e)
{
Debug.WriteLine(e.StackTrace);
return false;
}
}
}
public bool ValidateCredentials(User user, string password)
{
using (var context = new ChatContext())
{
try
{
foreach (var u in context.Users.ToList().Where(u => u.Username.Equals(user.Username)))
{
foreach (var credential in context.Credentials.ToList().Where(credential => credential.User.Equals(u)))
{
return credential.Password.Equals(password);
}
}
return false;
}
catch (Exception e)
{
Debug.WriteLine(e.StackTrace);
return false;
}
}
}
public bool Exists(User user)
{
using (var context = new ChatContext())
{
try
{
return context.Users.ToList().Any(u => u.Username.Equals(user.Username));
}
catch (Exception e)
{
Debug.WriteLine(e.StackTrace);
return false;
}
}
}
public IEnumerable<Conversation> GetAll()
{
using (var context = new ChatContext())
{
return context.Conversations;
}
}
public bool Exists(Conversation conversation)
{
using (var context = new ChatContext())
{
try
{
bool isEqual;
foreach (var c in context.Conversations.ToList())
{
isEqual = new HashSet<User>(c.Participants.ToList()).SetEquals(conversation.Participants.ToList());
if (isEqual)
return true;
}
return false;
}
catch (Exception e)
{
Debug.WriteLine(e.StackTrace);
return false;
}
}
}
