// Returns:
// - the list of files whose dates have changed
// - a collection of feedback information for each file whose dates were changed, each row detailing the file name and how the dates were changed
// - the number of missing Files, if any
private List <ImageRow> GetImageRowsWithChangedDates(IProgress <ProgressBarArguments> progress, int count, TimeZoneInfo imageSetTimeZone, ObservableCollection <DateTimeFeedbackTuple> feedbackRows, out int missingFiles)
{
List <ImageRow> filesToAdjust = new List <ImageRow>();
missingFiles = 0;
for (int fileIndex = 0; fileIndex < count; ++fileIndex)
{
if (Token.IsCancellationRequested)
{
// A cancel was requested. Clear all pending changes and abort
feedbackRows.Clear();
break;
}
// We will store the various times here
ImageRow file = this.fileDatabase.FileTable[fileIndex];
DateTimeOffset originalDateTime = file.DateTimeIncorporatingOffset;
string feedbackMessage = string.Empty;
try
{
// Get the image (if its there), get the new dates/times, and add it to the list of images to be updated
// Note that if the image can't be created, we will just to the catch.
bool usingMetadataTimestamp = true;
if (file.FileExists(this.fileDatabase.FolderPath) == false)
{
// The file does not exist. Generate a feedback message
missingFiles++;
}
else
{
// Read the date from the file, and check to see if its different from the recorded date
DateTimeAdjustmentEnum dateTimeAdjustment = file.TryReadDateTimeOriginalFromMetadata(this.fileDatabase.FolderPath, imageSetTimeZone);
if (dateTimeAdjustment == DateTimeAdjustmentEnum.MetadataNotUsed)
{
// We couldn't read the metadata, so get a candidate date/time from the file info instead
file.SetDateTimeOffsetFromFileInfo(this.fileDatabase.FolderPath);
usingMetadataTimestamp = false;
}
DateTimeOffset rescannedDateTime = file.DateTimeIncorporatingOffset;
bool sameDate = rescannedDateTime.Date == originalDateTime.Date;
bool sameTime = rescannedDateTime.TimeOfDay == originalDateTime.TimeOfDay;
bool sameUTCOffset = rescannedDateTime.Offset == originalDateTime.Offset;
if (!(sameDate && sameTime && sameUTCOffset))
{
// Date has been updated - add it to the queue of files to be processed, and generate a feedback message.
filesToAdjust.Add(file);
feedbackMessage = "\x2713"; // Checkmark
feedbackMessage += DateTimeHandler.ToStringDisplayDateTime(originalDateTime) + " \x2192 " + DateTimeHandler.ToStringDisplayDateTime(rescannedDateTime);
feedbackMessage += usingMetadataTimestamp ? " (read from metadata)" : " (read from file)";
feedbackRows.Add(new DateTimeFeedbackTuple(file.File, feedbackMessage));
}
}
}
catch (Exception exception)
{
// This shouldn't happen, but just in case.
TracePrint.PrintMessage(string.Format("Unexpected exception processing '{0}' in DateTimeReread. {1}", file.File, exception.ToString()));
feedbackMessage += string.Format("\x2716 skipping: {0}", exception.Message);
feedbackRows.Add(new DateTimeFeedbackTuple(file.File, feedbackMessage));
break;
}
// Update the progress bar every time interval to indicate what file we are working on
TimeSpan intervalFromLastRefresh = DateTime.Now - this.lastRefreshDateTime;
if (intervalFromLastRefresh > Constant.ThrottleValues.ProgressBarRefreshInterval)
{
int percentDone = Convert.ToInt32(fileIndex / Convert.ToDouble(count) * 100.0);
progress.Report(new ProgressBarArguments(percentDone, String.Format("Pass 1: Checking dates for {0} / {1} files", fileIndex, count), true, false));
Thread.Sleep(Constant.ThrottleValues.RenderingBackoffTime);
this.lastRefreshDateTime = DateTime.Now;
}
}
return(filesToAdjust);
}