public void SendMessage(DataMessage message)
{
Console.WriteLine("Call SendMessage");
int id = AddMessageIntoDatabase(message);
message.Id = id;
message.Sender = _allUsers.Find(x => x.Username == message.Sender.Username);
message.Receiver = _allUsers.Find(x => x.Username == message.Receiver.Username);
Console.WriteLine("sender: " + message.Sender.Username + "; to: " + message.Receiver.Username + "; message: " + message.Message);
lock (_synNotReceivedMessage)
{
_notReceivedMessages.Add(message);
}
if (_onlineUsers.ContainsKey(message.Receiver))
{
bool isReceived = false;
try
{
isReceived = _onlineUsers[message.Receiver].ReceiveMessage(message);
}
catch
{
Console.WriteLine("Cant find user online to send message");
_onlineUsers.Remove(message.Receiver);
}
if (isReceived)
{
lock (_synNotReceivedMessage)
{
UpdateReceivedMessageIntoDatabase(message);
_notReceivedMessages.Remove(message);
}
}
}
else
{
//cur User is offline
}
Console.WriteLine("exit SendMessage service");
}
/// <summary>
/// Change Message status into Received
/// Whose Id = message.id
/// </summary>
/// <param name="message"></param>
/// <returns></returns>
private bool UpdateReceivedMessageIntoDatabase(DataMessage message)
{
bool res = false;
string query = "UPDATE Messages " +
"SET [status] = @status " +
"WHERE id = @id";
using (SqlConnection connection = new SqlConnection(_strConnection))
{
SqlCommand command = new SqlCommand(query, connection);
command.Parameters.AddWithValue("@status", (int)DataMessageStatus.Received);
command.Parameters.AddWithValue("@id", message.Id);
if (connection.State != System.Data.ConnectionState.Open)
{
connection.Open();
}
res = 1 == command.ExecuteNonQuery();
}
return(res);
}
/// <summary>
/// Insert message into database
/// return message id that automatic genarated
/// </summary>
/// <param name="msg"></param>
/// <returns></returns>
private int AddMessageIntoDatabase(DataMessage msg)
{
int result = -1;
string query = "INSERT INTO Messages (sender, receiver, time_sent, [message], [status]) " +
"OUTPUT inserted.id " +
"VALUES(@sender, @receiver, @time_sent, @message, @status)";
using (SqlConnection connection = new SqlConnection(_strConnection))
{
SqlCommand command = new SqlCommand(query, connection);
command.Parameters.AddWithValue("@sender", msg.Sender.Username);
command.Parameters.AddWithValue("@receiver", msg.Receiver.Username);
command.Parameters.AddWithValue("@time_sent", msg.SentTime);
command.Parameters.AddWithValue("@message", msg.Message);
command.Parameters.AddWithValue("@status", (int)DataMessageStatus.Sent);
if (connection.State != System.Data.ConnectionState.Open)
{
connection.Open();
}
result = int.Parse(command.ExecuteScalar().ToString());
}
return(result);
}
/// <summary>
/// Load all users from database into _allUserss
/// Load relationship of users
/// Create directory for storing avatar image
/// Load unreceived messages
/// </summary>
public static void Init()
{
//Init _allUsers
String query = "SELECT username, name, gender " +
"FROM Users";
using (SqlConnection connection = new SqlConnection(_strConnection))
{
SqlCommand command = new SqlCommand(query, connection);
if (connection.State != System.Data.ConnectionState.Open)
{
connection.Open();
}
SqlDataReader reader = command.ExecuteReader();
while (reader.Read())
{
User user = new User()
{
IsOnline = false,
Name = (string)reader["name"],
Username = (string)reader["username"]
};
if (reader["gender"].ToString().Length > 0)
{
user.IsMale = (bool)reader["gender"];
}
_allUsers.Add(user);
_relationship.Add(user, new NodeRelationship(user));
}
}
//Init _relationship
query = "SELECT foo, bar, relation " +
"FROM Relations";
using (SqlConnection connection = new SqlConnection(_strConnection))
{
SqlCommand command = new SqlCommand(query, connection);
if (connection.State != System.Data.ConnectionState.Open)
{
connection.Open();
}
SqlDataReader reader = command.ExecuteReader();
while (reader.Read())
{
string foo = reader["foo"].ToString();
string bar = reader["bar"].ToString();
int relationType = (int)reader["relation"];
if (relationType == (int)RelationshipType.Friend)
{
User fooUser = _allUsers.Find(x => x.Username == foo);
User barUser = _allUsers.Find(x => x.Username == bar);
_relationship[fooUser].Friends.Add(_relationship[barUser]);
_relationship[barUser].Friends.Add(_relationship[fooUser]);
}
else if (relationType == (int)RelationshipType.Pending)
{
User fooUser = _allUsers.Find(x => x.Username == foo);
User barUser = _allUsers.Find(x => x.Username == bar);
_relationship[fooUser].SentPendingRequest.Add(_relationship[barUser]);
_relationship[barUser].ReceivedPendingRequest.Add(_relationship[fooUser]);
}
}
}
//Init directory
DirectoryInfo dir = new DirectoryInfo(AVATAR_LOCATION);
if (!dir.Exists)
{
dir.Create();
}
//load unreceived messages
query = "SELECT id, sender, receiver, time_sent, message " +
"FROM Messages " +
"WHERE status = @NotReceivedStatus";
using (SqlConnection connection = new SqlConnection(_strConnection))
{
SqlCommand command = new SqlCommand(query, connection);
command.Parameters.AddWithValue("@NotReceivedStatus", (int)DataMessageStatus.Sent);
if (connection.State != System.Data.ConnectionState.Open)
{
connection.Open();
}
SqlDataReader reader = command.ExecuteReader();
while (reader.Read())
{
DataMessage msg = new DataMessage()
{
Id = int.Parse(reader["id"].ToString()),
Message = (string)reader["message"],
Receiver = _allUsers.Find(x => x.Username == (string)reader["receiver"]),
Sender = _allUsers.Find(x => x.Username == (string)reader["sender"]),
SentTime = (DateTime)reader["time_sent"]
};
_notReceivedMessages.Add(msg);
}
}
}
