public async Task <UndoLastChangeResponse> UndoLastChange(string name, string version)
{
myUndoLastChangeTaskCompletionSource = new TaskCompletionSource <UndoLastChangeResponse>();
var ok = await SendText("UNDO\nName:" + name + "\nVersion:" + version + "\n");
var taskCompletionSource = myUndoLastChangeTaskCompletionSource;
if (!ok || taskCompletionSource == null)
{
var response = new UndoLastChangeResponse
{
ErrorMessage = UnableToSendCommandErrorMessage
};
return(response);
}
return(await taskCompletionSource.Task);
}
protected override bool TryProcessCommand(string previousCommandName, string commandName, SortedDictionary <string, string> commandParameters)
{
const string createSessionSucceededCommandName = "create ok";
const string createSessionFailedCommandName = "create fail";
const string joinSessionSucceededCommandName = "join ok";
const string joinSessionFailedCommandName = "join fail";
const string changeCellSucceededCommandName = "change ok";
const string changeCellVersionOutOfDateCommandName = "change wait";
const string changeCellFailedCommandName = "change fail";
const string undoSucceededCommandName = "undo ok";
const string undoNoUnsavedChangesCommandName = "undo end";
const string undoVersionOutOfDateCommandName = "undo wait";
const string undoFailedCommandName = "undo fail";
const string updateCommandName = "update";
const string saveSucceededCommandName = "save ok";
const string saveFailedCommandName = "save fail";
const string passwordParameterName = "password";
const string versionParameterName = "version";
const string cellParameterName = "cell";
const string lengthParameterName = "length";
string name;
string password;
string version;
string cell;
string length;
switch (commandName)
{
case createSessionSucceededCommandName:
if (!ValidateParameters(commandParameters, NameParameterName, passwordParameterName))
{
var response = new CreateSessionResponse
{
ErrorMessage = InvalidResponseErrorMessage
};
return(TrySetResponse(myCreateSessionTaskCompletionSource, response));
}
if (commandParameters.TryGetValue(NameParameterName, out name) && commandParameters.TryGetValue(passwordParameterName, out password))
{
var response = new CreateSessionResponse
{
Name = name,
Password = password
};
return(TrySetResponse(myCreateSessionTaskCompletionSource, response));
}
return(false);
case createSessionFailedCommandName:
return(CommandFailedValidateParameters(commandParameters, myCreateSessionTaskCompletionSource));
case joinSessionSucceededCommandName:
if (!ValidateParameters(commandParameters, NameParameterName, versionParameterName, lengthParameterName))
{
var response = new JoinSessionResponse
{
ErrorMessage = InvalidResponseErrorMessage
};
return(TrySetResponse(myJoinSessionTaskCompletionSource, response));
}
return(false);
case joinSessionFailedCommandName:
return(CommandFailedValidateParameters(commandParameters, myJoinSessionTaskCompletionSource));
case changeCellSucceededCommandName:
if (!ValidateParameters(commandParameters, NameParameterName, versionParameterName))
{
var response = new ChangeCellResponse
{
ErrorMessage = InvalidResponseErrorMessage
};
return(TrySetResponse(myChangeCellTaskCompletionSource, response));
}
if (commandParameters.TryGetValue(NameParameterName, out name) && commandParameters.TryGetValue(versionParameterName, out version))
{
var response = new ChangeCellResponse
{
Name = name,
Version = version
};
return(TrySetResponse(myChangeCellTaskCompletionSource, response));
}
return(false);
case changeCellVersionOutOfDateCommandName:
if (!ValidateParameters(commandParameters, NameParameterName, versionParameterName))
{
var response = new ChangeCellResponse
{
ErrorMessage = InvalidResponseErrorMessage
};
return(TrySetResponse(myChangeCellTaskCompletionSource, response));
}
if (commandParameters.TryGetValue(NameParameterName, out name) && commandParameters.TryGetValue(versionParameterName, out version))
{
var response = new ChangeCellResponse
{
Name = name,
Version = version,
VersionOutOfDate = true
};
return(TrySetResponse(myChangeCellTaskCompletionSource, response));
}
return(false);
case changeCellFailedCommandName:
return(CommandFailedValidateParameters(commandParameters, myChangeCellTaskCompletionSource));
case undoSucceededCommandName:
if (!ValidateParameters(commandParameters, NameParameterName, versionParameterName, cellParameterName, lengthParameterName))
{
var response = new UndoLastChangeResponse
{
ErrorMessage = InvalidResponseErrorMessage
};
return(TrySetResponse(myUndoLastChangeTaskCompletionSource, response));
}
return(false);
case undoNoUnsavedChangesCommandName:
if (!ValidateParameters(commandParameters, NameParameterName, versionParameterName))
{
var response = new UndoLastChangeResponse
{
ErrorMessage = InvalidResponseErrorMessage
};
return(TrySetResponse(myUndoLastChangeTaskCompletionSource, response));
}
if (commandParameters.TryGetValue(NameParameterName, out name) && commandParameters.TryGetValue(versionParameterName, out version))
{
var response = new UndoLastChangeResponse
{
Name = name,
Version = version,
NoUnsavedChanges = true
};
return(TrySetResponse(myUndoLastChangeTaskCompletionSource, response));
}
return(false);
case undoVersionOutOfDateCommandName:
if (!ValidateParameters(commandParameters, NameParameterName, versionParameterName))
{
var response = new UndoLastChangeResponse
{
ErrorMessage = InvalidResponseErrorMessage
};
return(TrySetResponse(myUndoLastChangeTaskCompletionSource, response));
}
if (commandParameters.TryGetValue(NameParameterName, out name) && commandParameters.TryGetValue(versionParameterName, out version))
{
var response = new UndoLastChangeResponse
{
Name = name,
Version = version,
VersionOutOfDate = true
};
return(TrySetResponse(myUndoLastChangeTaskCompletionSource, response));
}
return(false);
case undoFailedCommandName:
return(CommandFailedValidateParameters(commandParameters, myUndoLastChangeTaskCompletionSource));
case updateCommandName:
if (!ValidateParameters(commandParameters, NameParameterName, versionParameterName, cellParameterName, lengthParameterName))
{
return(true);
}
return(false);
case saveSucceededCommandName:
if (!ValidateParameters(commandParameters, NameParameterName))
{
var response = new SaveResponse
{
ErrorMessage = InvalidResponseErrorMessage
};
return(TrySetResponse(mySaveTaskCompletionSource, response));
}
if (commandParameters.TryGetValue(NameParameterName, out name))
{
var response = new SaveResponse
{
Name = name
};
return(TrySetResponse(mySaveTaskCompletionSource, response));
}
return(false);
case saveFailedCommandName:
return(CommandFailedValidateParameters(commandParameters, mySaveTaskCompletionSource));
default:
switch (previousCommandName)
{
case createSessionFailedCommandName:
return(CommandFailed(commandParameters, new CreateSessionResponse(), commandName, myCreateSessionTaskCompletionSource));
case joinSessionSucceededCommandName:
if (!ValidateParameters(commandParameters, NameParameterName, versionParameterName, lengthParameterName))
{
var response = new CreateSessionResponse
{
ErrorMessage = InvalidResponseErrorMessage
};
return(TrySetResponse(myCreateSessionTaskCompletionSource, response));
}
if
(
commandParameters.TryGetValue(NameParameterName, out name) &&
commandParameters.TryGetValue(versionParameterName, out version) &&
commandParameters.TryGetValue(lengthParameterName, out length)
)
{
JoinSessionResponse response;
int lengthValue;
if (!int.TryParse(length, out lengthValue) || commandName.Length != lengthValue)
{
response = new JoinSessionResponse
{
ErrorMessage = InvalidResponseErrorMessage
};
}
else
{
response = new JoinSessionResponse
{
Name = name,
Version = version,
Xml = commandName
};
}
return(TrySetResponse(myJoinSessionTaskCompletionSource, response));
}
return(false);
case joinSessionFailedCommandName:
return(CommandFailed(commandParameters, new JoinSessionResponse(), commandName, myJoinSessionTaskCompletionSource));
case changeCellFailedCommandName:
return(CommandFailed(commandParameters, new ChangeCellResponse(), commandName, myChangeCellTaskCompletionSource));
case undoSucceededCommandName:
if (!ValidateParameters(commandParameters, NameParameterName, versionParameterName, cellParameterName, lengthParameterName))
{
var response = new UndoLastChangeResponse
{
ErrorMessage = InvalidResponseErrorMessage
};
return(TrySetResponse(myUndoLastChangeTaskCompletionSource, response));
}
if
(
commandParameters.TryGetValue(NameParameterName, out name) &&
commandParameters.TryGetValue(versionParameterName, out version) &&
commandParameters.TryGetValue(cellParameterName, out cell) &&
commandParameters.TryGetValue(lengthParameterName, out length)
)
{
UndoLastChangeResponse response;
int lengthValue;
if (!int.TryParse(length, out lengthValue) || commandName.Length != lengthValue)
{
response = new UndoLastChangeResponse
{
ErrorMessage = InvalidResponseErrorMessage
};
}
else
{
response = new UndoLastChangeResponse
{
Name = name,
Version = version,
Cell = cell,
Content = commandName
};
}
return(TrySetResponse(myUndoLastChangeTaskCompletionSource, response));
}
return(false);
case undoFailedCommandName:
return(CommandFailed(commandParameters, new UndoLastChangeResponse(), commandName, myUndoLastChangeTaskCompletionSource));
case updateCommandName:
if (!ValidateParameters(commandParameters, NameParameterName, versionParameterName, cellParameterName, lengthParameterName))
{
return(true);
}
if
(
commandParameters.TryGetValue(NameParameterName, out name) &&
commandParameters.TryGetValue(versionParameterName, out version) &&
commandParameters.TryGetValue(cellParameterName, out cell) &&
commandParameters.TryGetValue(lengthParameterName, out length)
)
{
int lengthValue;
if (!int.TryParse(length, out lengthValue) || commandName.Length != lengthValue)
{
return(true);
}
var cellUpdated = CellUpdated;
if (cellUpdated == null)
{
return(true);
}
var updateEventArgs = new CellUpdatedEventArgs
{
Name = name,
Version = version,
Cell = cell,
Content = commandName
};
cellUpdated(this, updateEventArgs);
return(true);
}
return(false);
case saveFailedCommandName:
return(CommandFailed(commandParameters, new SaveResponse(), commandName, mySaveTaskCompletionSource));
default:
return(false);
}
}
}