private Task ProcessFiles()
{
return(Task.Run(async() =>
{
var fileInfos = new DirectoryInfo(FilePath).GetFiles(FilePattern);
foreach (var fileInfo in fileInfos)
{
var newNumLines = await GetLineCount(fileInfo.FullName);
var oldFileInfoPair = FileLineMap.FirstOrDefault(fi => fi.Key.Name == fileInfo.Name);
if (!oldFileInfoPair.Equals(default(KeyValuePair <FileInfo, int>)) && oldFileInfoPair.Key.LastWriteTime != fileInfo.LastWriteTime)
{
// update the # of lines (other FileInfo properties will be refreshed in RemoveDeletedFiles)
if (FileLineMap.TryUpdate(oldFileInfoPair.Key, newNumLines, oldFileInfoPair.Value))
{
OutputFunction.Invoke($"Changed: {fileInfo.Name}, {newNumLines - oldFileInfoPair.Value}");
}
}
// new file
else
{
if (oldFileInfoPair.Key?.Name != fileInfo.Name && FileLineMap.TryAdd(fileInfo, newNumLines))
{
OutputFunction.Invoke($"Created: {fileInfo.Name}, {newNumLines}");
}
}
}
// no need to wait for this
Task.Factory.StartNew(RemoveDeletedFiles, CancellationToken);
},
CancellationToken));
}