/// <summary>
/// When the user clicks cancel this method will be called and will terminate
/// the socket and this spreadsheet.
/// </summary>
/// <param name="clickedCancel"></param>
private void CancelSpreadSheet(bool clickedCancel)
{
if (clickedCancel) {
if (this.InvokeRequired) {
ShowSSCallback d = new ShowSSCallback(CloseSS);
this.Invoke(d, new object[] { });
} else {
CloseServerSocket();
Close();
}
}
return;
}
/// <summary>
/// Method called when a new message has been received by the server.
/// </summary>
/// <param name="line"></param>
/// <param name="e"></param>
private void MessageReceived(String line, Exception e)
{
if (ReferenceEquals(line, null) || line == "") {
if (e is SocketException) {
serverClosed = true;
MessageBox.Show("Server has closed. Please try again later.",
"Message",
MessageBoxButtons.OK,
MessageBoxIcon.Error);
if (this.InvokeRequired) {
CloseSSCallback d = new CloseSSCallback(CloseSS);
this.Invoke(d, new object[] { });
} else {
CloseSS();
}
return;
}
return;
}
string[] lineReceived = Regex.Split(line, esc.ToString());
string protocol = lineReceived[0];
//INVALID\n
if (protocol.Equals("INVALID")) {
login.LoginError();
login = new Login.Form1(client);
login.ShowDialog();
}
//FILELIST[esc]list_of_existing_filenames\n ( each name delimited by [esc])
else if (protocol.Equals("FILELIST")) {
availableFile = new AvailableFiles.Form1(client);
availableFile.ClickedCancel += CancelSpreadSheet;
//Add the items to the list of items you can open
availableFile.AddSS(lineReceived);
//Run the files available prompt window.
availableFile.ShowDialog();
NameOfSS = availableFile.getSSName();
//Shows the spreadsheet again after the user has picked to open
// a new spreadsheet or to open an exsisting spreadsheet.
if (this.InvokeRequired) {
ShowSSCallback d = new ShowSSCallback(ShowSS);
this.Invoke(d, new object[] { });
} else {
spreadsheetPanel1.Show();
}
availableFile.Focus();
time.Start();
SetTitle();
}
//UPDATE[esc]current_version[esc]cell_name1[esc]cell_content1[esc]cell_name2[esc]…\n
//SYNC[esc]current_version[esc]cell_name[esc]cell_content…\n
else if (protocol.Equals("UPDATE") || protocol.Equals("SYNC")) {
Dictionary<string, string> cells = new Dictionary<string, string>();
String cellName = ""; String cellCont = "";
try {
int currentVersion = Convert.ToInt32(lineReceived[1]);
//If the last command sent to server was an edit to the spreadsheet and
// the version + 1 doesn't equal to the version send back by the server demand a Resync to server.
if (SSEdit && (versionNumber + 1) != currentVersion) {
//Must resync with the server.
client.SendMessage("RESYNC\n");
SSEdit = false;
return;
}
versionNumber = currentVersion;
} catch {
//TODO:Handle this properly.
MessageBox.Show(
"Error",
"Protocol was not sent properly. No version number was sent",
MessageBoxButtons.OK,
MessageBoxIcon.Error);
return;
}
//Go through the array and place the cellName in the correct container
// and do the same with the content of that cell.
for (int i = 2; i < lineReceived.Length; i++) {
if (i % 2 == 0) {
//It is a cell name
cellName = lineReceived[i];
i++;
}
if ((i % 2) == 1 && i < lineReceived.Length) {
//It is the contents of the cell.
cellCont = lineReceived[i];
}
cells.Add(cellName, cellCont);
}
Update(cells);
SSEdit = false;
} else if (protocol.Equals("SAVED")) {
//TODO: what to do when the saved command is received.
MessageBox.Show("File Successfully Saved",
"Saved",
MessageBoxButtons.OK,
MessageBoxIcon.Information);
return;
}
//ERROR[esc]error_message\n
else if (protocol.Equals("ERROR")) {
MessageBox.Show(lineReceived[1],
"Message",
MessageBoxButtons.OK,
MessageBoxIcon.Error);
return;
}
}
/************************** THREAD SAFE METHODS **************************/
/// <summary>
/// If user closes available file window has been closed and closes this spreadsheet as well.
/// </summary>
private void availableFileClosed(object sender, FormClosedEventArgs e)
{
if (this.InvokeRequired) {
ShowSSCallback d = new ShowSSCallback(CloseSS);
this.Invoke(d, new object[] { });
} else {
this.Close();
}
}
