private static IEnumerable <FileRecord> CopyOrNot(IList <FileRecord> records)
{
var groupedByDestination = records.OrderByDescending(x => x.SourcePath).GroupBy(x => x.DestinationPath);
foreach (var group in groupedByDestination)
{
var groupedByChecksum = group.GroupBy(x => x.Checksum).ToList();
if (groupedByChecksum.Count == 1)
{
group.First().CopyOrNot = "copy";
foreach (var item in group.Skip(1))
{
item.CopyOrNot = "not";
}
}
else
{
foreach (var item1 in groupedByChecksum)
{
var firstInGroup = item1.First();
var prefix = firstInGroup.RelativePath.ToLower().Replace("/", "-").Replace("\\", "-");
firstInGroup.DestinationPath = FileRecordTools.CalculateDestinationPath(firstInGroup.Year, firstInGroup.Month,
$"{prefix}-{firstInGroup.Filename}");
firstInGroup.CopyOrNot = "copy";
foreach (var item2 in item1.Skip(1))
{
item2.CopyOrNot = "not";
}
}
}
}
return(records);
}
