/// <summary>
/// Constructor to load the specified Btrieve File at the given Path
/// </summary>
/// <param name="fileUtility"></param>
/// <param name="path"></param>
/// <param name="fileName"></param>
public BtrieveFileProcessor(IFileUtility fileUtility, string path, string fileName)
{
_fileFinder = fileUtility;
Keys = new Dictionary <ushort, BtrieveKey>();
AutoincrementedKeys = new Dictionary <ushort, BtrieveKey>();
if (string.IsNullOrEmpty(path))
{
path = Directory.GetCurrentDirectory();
}
if (!Path.EndsInDirectorySeparator(path))
{
path += Path.DirectorySeparatorChar;
}
var loadedFileName = _fileFinder.FindFile(path, fileName);
// hack for MUTANTS which tries to load a DATT file
if (Path.GetExtension(loadedFileName).ToUpper() == ".DATT")
{
loadedFileName = Path.ChangeExtension(loadedFileName, ".DAT");
}
// If a .DB version exists, load it over the .DAT file
var dbFileName = loadedFileName.ToUpper().Replace(".DAT", ".DB");
var fullPath = Path.Combine(path, dbFileName);
if (File.Exists(fullPath))
{
LoadSqlite(fullPath);
}
else
{
var btrieveFile = new BtrieveFile();
btrieveFile.LoadFile(_logger, path, loadedFileName);
CreateSqliteDB(fullPath, btrieveFile);
}
//Set Position to First Record
StepFirst();
}
/// <summary>
/// Loads a Btrieve .DAT File
/// </summary>
/// <param name="path"></param>
/// <param name="fileName"></param>
private void LoadBtrieve(string path, string fileName)
{
//Sanity Check if we're missing .DAT files and there are available .VIR files that can be used
var virginFileName = fileName.Replace(".DAT", ".VIR");
if (!File.Exists($"{path}{fileName}") && File.Exists($"{path}{virginFileName}"))
{
File.Copy($"{path}{virginFileName}", $"{path}{fileName}");
_logger.Warn($"Created {fileName} by copying {virginFileName} for first use");
}
//If we're missing a DAT file, just bail. Because we don't know the file definition, we can't just create a "blank" one.
if (!File.Exists($"{path}{fileName}"))
{
_logger.Error($"Unable to locate existing btrieve file {fileName}");
throw new FileNotFoundException($"Unable to locate existing btrieve file {fileName}");
}
var fileData = File.ReadAllBytes($"{path}{fileName}");
LoadedFile = new BtrieveFile(fileData)
{
FileName = LoadedFileName
};
LoadedFileSize = fileData.Length;
#if DEBUG
_logger.Info($"Opened {fileName} and read {LoadedFile.Data.Length} bytes");
#endif
//Only Parse Keys if they are defined
if (LoadedFile.KeyCount > 0)
{
LoadBtrieveKeyDefinitions();
}
//Only load records if there are any present
if (LoadedFile.RecordCount > 0)
{
LoadBtrieveRecords();
}
}
