/// <summary>
/// Validates any imported chapter information against the currently detected chapter information in the
/// source media. If validation fails then an error message is returned via the out parameter <see cref="validationErrorMessage"/>
/// </summary>
/// <param name="importedChapters">The list of imported chapter information</param>
/// <param name="validationErrorMessage">In case of a validation error this variable will hold
/// a detailed message that can be presented to the user</param>
/// <returns>True if there are no errors with imported chapters, false otherwise</returns>
private bool ValidateImportedChapters(Dictionary <int, Tuple <string, TimeSpan> > importedChapters, out string validationErrorMessage, bool hasTimestamps)
{
validationErrorMessage = null;
// If the number of chapters don't match, prompt for confirmation
if (importedChapters.Count != this.Chapters.Count)
{
if (this.errorService.ShowMessageBox(
string.Format(Resources.ChaptersViewModel_ValidateImportedChapters_ChapterCountMismatchMsg, this.Chapters.Count, importedChapters.Count),
Resources.ChaptersViewModel_ValidateImportedChapters_ChapterCountMismatchWarning,
MessageBoxButton.YesNo,
MessageBoxImage.Question) !=
MessageBoxResult.Yes)
{
return(false);
}
}
// If the average discrepancy in timings between chapters is either:
// a) more than 15 sec for more than 2 chapters
// (I chose 15sec based on empirical evidence from testing a few DVDs and comparing to chapter-marker files I downloaded)
// => This check will not be performed for the first and last chapter as they're very likely to differ significantly due to language and region
// differences (e.g. longer title sequences and different distributor credits)
if (hasTimestamps)
{
List <TimeSpan> diffs = new List <TimeSpan>();
foreach (KeyValuePair <int, Tuple <string, TimeSpan> > import in importedChapters)
{
ChapterMarker sourceMarker = this.Chapters[import.Key - 1];
TimeSpan source = sourceMarker.Duration;
TimeSpan diff = source - import.Value.Item2;
diffs.Add(diff);
}
// var diffs = importedChapters.Zip(this.Chapters, (import, source) => source.Duration - import.Value.Item2);
if (diffs.Count(diff => Math.Abs(diff.TotalSeconds) > 15) > 2)
{
if (this.errorService.ShowMessageBox(
Resources.ChaptersViewModel_ValidateImportedChapters_ChapterDurationMismatchMsg,
Resources.ChaptersViewModel_ValidateImportedChapters_ChapterDurationMismatchWarning,
MessageBoxButton.YesNo,
MessageBoxImage.Question) != MessageBoxResult.Yes)
{
return(false);
}
}
}
// All is well, we should import chapters
return(true);
}
/// <summary>
/// Set the Source Chapters List
/// </summary>
/// <param name="sourceChapters">
/// The source chapters.
/// </param>
public void SetSourceChapters(IEnumerable <Chapter> sourceChapters)
{
// Cache the chapters in this screen
this.SourceChapterList = new ObservableCollection <Chapter>(sourceChapters);
this.Chapters.Clear();
// Then Add new Chapter Markers.
int counter = 1;
foreach (Chapter chapter in this.SourceChapterList)
{
string chapterName = string.IsNullOrEmpty(chapter.ChapterName) ? string.Format(Resources.ChapterViewModel_Chapter, counter) : chapter.ChapterName;
var marker = new ChapterMarker(chapter.ChapterNumber, chapterName, chapter.Duration);
this.Chapters.Add(marker);
counter += 1;
}
}