/// <summary>
/// Fixes switchable file mixups usually caused by a system or DFOCP crash. Does nothing if no problems
/// are detected. Note if the game is running with switched files, this method will try to "fix" them
/// and fail.
/// </summary>
/// <param name="wereBroken">Set to true if the files were broken and were fixed. Set to false if
/// the files were not broken.</param>
/// <exception cref="System.IO.IOException">Something went wrong while trying to fix the mixup.</exception>
/// <exception cref="System.ArgumentNullException">One of the properties is null.</exception>
public void FixBrokenFiles(out bool wereBroken)
{
wereBroken = false;
NormalFile.ThrowIfNull("FileToSwitch");
CustomFile.ThrowIfNull("FileToSwitchWith");
TempFile.ThrowIfNull("TempFile");
Logging.Log.DebugFormat("Repairing switchable ('{0}', '{1}', '{2}').",
NormalFile, CustomFile, TempFile);
Action <string, string> move = FileType.GetMoveFunction();
Func <string, bool> exists = FileType.GetExistsFunction();
if (exists(TempFile) && exists(NormalFile))
{
wereBroken = true;
Logging.Log.DebugFormat("Normal and temp exist.");
// Rename FileToSwitch to FileToSwitchWith
try
{
move(NormalFile, CustomFile);
Logging.Log.DebugFormat("Moved file at normal location {0} to custom location {1}",
NormalFile, CustomFile);
}
catch (Exception ex) // XXX: Catch specific exceptions
{
throw new IOException(string.Format("Could not move {0} to {1}. {2}",
NormalFile, CustomFile, ex.Message));
}
// Rename TempFile to FileToSwitch
try
{
move(TempFile, NormalFile);
Logging.Log.DebugFormat("Moved file at temp location {0} to normal location {1}",
TempFile, NormalFile);
Logging.Log.DebugFormat("Repair complete.");
}
catch (Exception ex) // XXX: Catch specific exceptions
{
throw new IOException(string.Format("Could not move {0} to {1}. {2}",
TempFile, NormalFile, ex.Message));
}
}
else if (exists(TempFile) && exists(CustomFile))
{
wereBroken = true;
Logging.Log.DebugFormat("Custom and temp exist.");
// Rename TempFile to FileToSwitch
try
{
move(TempFile, NormalFile);
Logging.Log.DebugFormat("Moved file at temp location {0} to normal location {1}",
TempFile, NormalFile);
}
catch (Exception ex)
{
throw new IOException(string.Format("Could not move {0} to {1}. {2}",
TempFile, NormalFile, ex.Message));
}
}
else
{
Logging.Log.DebugFormat("Not broken, nothing to repair.");
return;
}
}
/// <summary>
/// Moves FileToSwitch to TempFile and FileToSwitchWith to FileToSwitch. If the second move fails,
/// the first move is attempted to be undone.
/// </summary>
/// <returns>A SwitchedFile object you can use to switch back by calling SwitchBack() on it.</returns>
/// <exception cref="System.ArgumentNullExcepton">One of the properties is null.</exception>
/// <exception cref="System.IO.IOException">The file could not be switched.</exception>
public SwitchedFile Switch()
{
NormalFile.ThrowIfNull("FileToSwitch");
CustomFile.ThrowIfNull("FileToSwitchWith");
TempFile.ThrowIfNull("TempFile");
Logging.Log.DebugFormat("Switching {0} with {1} using {2} as a temporary.",
NormalFile, CustomFile, TempFile);
Action <string, string> move = FileType.GetMoveFunction();
bool firstMoveSuccessful = false;
try
{
move(NormalFile, TempFile);
firstMoveSuccessful = true;
Logging.Log.DebugFormat("Moved {0} to {1}.", NormalFile, TempFile);
move(CustomFile, NormalFile);
Logging.Log.DebugFormat("Moved {0} to {1}.", CustomFile, NormalFile);
Logging.Log.DebugFormat("Switch successful.");
return(new SwitchedFile(NormalFile, CustomFile, TempFile, FileType));
}
catch (Exception ex)
{
// If the first move was successful, we can probably move it back
bool undoSuccess = false;
Exception undoError = null;
if (firstMoveSuccessful)
{
try
{
move(TempFile, NormalFile);
undoSuccess = true;
}
catch (Exception ex2)
{
undoError = ex2;
}
}
if (!firstMoveSuccessful)
{
throw new IOException(string.Format(
"Could not move {0} to {1}. {2}",
NormalFile, TempFile, ex.Message), ex);
}
else
{
string undoMessage;
if (undoSuccess)
{
undoMessage = string.Format(
"{0} moved back to {1}.",
TempFile, NormalFile);
}
else
{
undoMessage = string.Format(
"{0} could not be moved back to {1}. {2} Files are in an inconsistent state!",
TempFile, NormalFile, undoError.Message);
}
throw new IOException(string.Format(
"Could not move {0} to {1}. {2} {3}",
CustomFile, NormalFile, ex.Message, undoMessage), ex);
}
}
}
