public static ArchivingSettings GetSettingsFromArguments(string[] args)
{
if (args == null || args.Length < 3)
throw new ArgumentException("Wrong arguments count");
ArchivingSettings result;
switch (args[0])
{
case TypeCompress:
result = new ArchivingSettings
{
Mode = CompressionMode.Compress,
File = args[1],
Archive = args[2]
};
break;
case TypeDecompress:
result = new ArchivingSettings
{
Mode = CompressionMode.Decompress,
File = args[2],
Archive = args[1]
};
break;
default:
throw new ArgumentException("Wrong action argument");
}
CheckFiles(result);
return result;
}
private static void CheckFiles(ArchivingSettings settings)
{
if ((settings.Mode == CompressionMode.Compress && !File.Exists(settings.File)) ||
(settings.Mode == CompressionMode.Decompress && !File.Exists(settings.Archive)))
throw new FileNotFoundException("Input file does not exist");
if ((settings.Mode == CompressionMode.Compress && File.Exists(settings.Archive)) ||
(settings.Mode == CompressionMode.Decompress && File.Exists(settings.File)))
throw new Exception("Output file already exist");
}