/// <summary>
/// Detect header skipper compliance and create an output file
/// </summary>
/// <param name="file">Name of the file to be parsed</param>
/// <param name="outDir">Output directory to write the file to, empty means the same directory as the input file</param>
/// <param name="nostore">True if headers should not be stored in the database, false otherwise</param>
/// <returns>True if the output file was created, false otherwise</returns>
public static bool DetectTransformStore(string file, string outDir, bool nostore)
{
// Create the output directory if it doesn't exist
DirectoryExtensions.Ensure(outDir, create: true);
logger.User($"\nGetting skipper information for '{file}'");
// Get the skipper rule that matches the file, if any
SkipperRule rule = GetMatchingRule(file, string.Empty);
// If we have an empty rule, return false
if (rule.Tests == null || rule.Tests.Count == 0 || rule.Operation != HeaderSkipOperation.None)
return false;
logger.User("File has a valid copier header");
// Get the header bytes from the file first
string hstr;
try
{
// Extract the header as a string for the database
#if NET_FRAMEWORK
using (var fs = FileExtensions.TryOpenRead(file))
{
#else
using var fs = FileExtensions.TryOpenRead(file);
#endif
byte[] hbin = new byte[(int)rule.StartOffset];
fs.Read(hbin, 0, (int)rule.StartOffset);
hstr = Utilities.ByteArrayToString(hbin);
#if NET_FRAMEWORK
}
#endif
}
catch
{
return false;
}
// Apply the rule to the file
string newfile = (string.IsNullOrWhiteSpace(outDir) ? Path.GetFullPath(file) + ".new" : Path.Combine(outDir, Path.GetFileName(file)));
rule.TransformFile(file, newfile);
// If the output file doesn't exist, return false
if (!File.Exists(newfile))
return false;
// Now add the information to the database if it's not already there
if (!nostore)
{
BaseFile baseFile = FileExtensions.GetInfo(newfile, hashes: Hash.SHA1, asFiles: TreatAsFile.NonArchive);
DatabaseTools.AddHeaderToDatabase(hstr, Utilities.ByteArrayToString(baseFile.SHA1), rule.SourceFile);
}
return true;
}