public override async Task <StatusHandler> ProcessAsync(LibraryBook libraryBook)
{
OnBegin(libraryBook);
OnStreamingBegin($"Begin converting {libraryBook} to mp3");
try
{
var m4bPath = AudibleFileStorage.Audio.GetPath(libraryBook.Book.AudibleProductId);
m4bBook = new Mp4File(m4bPath, FileAccess.Read);
m4bBook.ConversionProgressUpdate += M4bBook_ConversionProgressUpdate;
fileSize = m4bBook.InputStream.Length;
OnTitleDiscovered(m4bBook.AppleTags.Title);
OnAuthorsDiscovered(m4bBook.AppleTags.FirstAuthor);
OnNarratorsDiscovered(m4bBook.AppleTags.Narrator);
OnCoverImageDiscovered(m4bBook.AppleTags.Cover);
using var mp3File = File.OpenWrite(Path.GetTempFileName());
var result = await Task.Run(() => m4bBook.ConvertToMp3(mp3File));
m4bBook.InputStream.Close();
mp3File.Close();
var proposedMp3Path = Mp3FileName(m4bPath);
var realMp3Path = FileUtility.SaferMoveToValidPath(mp3File.Name, proposedMp3Path);
OnFileCreated(libraryBook, realMp3Path);
var statusHandler = new StatusHandler();
if (result == ConversionResult.Failed)
{
statusHandler.AddError("Conversion failed");
}
return(statusHandler);
}
finally
{
OnStreamingCompleted($"Completed converting to mp3: {libraryBook.Book.Title}");
OnCompleted(libraryBook);
}
}
// do NOT use ConfigureAwait(false) on ProcessAsync()
// often calls events which prints to forms in the UI context
public async Task <StatusHandler> ProcessAsync(LibraryBook libraryBook)
{
Begin?.Invoke(this, libraryBook);
try
{
var aaxFilename = AudibleFileStorage.AAX.GetPath(libraryBook.Book.AudibleProductId);
if (aaxFilename == null)
{
return new StatusHandler {
"aaxFilename parameter is null"
}
}
;
if (!File.Exists(aaxFilename))
{
return new StatusHandler {
$"Cannot find AAX file: {aaxFilename}"
}
}
;
if (AudibleFileStorage.Audio.Exists(libraryBook.Book.AudibleProductId))
{
return new StatusHandler {
"Cannot find decrypt. Final audio file already exists"
}
}
;
var outputAudioFilename = await aaxToM4bConverterDecrypt(aaxFilename, libraryBook);
// decrypt failed
if (outputAudioFilename == null)
{
return new StatusHandler {
"Decrypt failed"
}
}
;
var destinationDir = moveFilesToBooksDir(libraryBook.Book, outputAudioFilename);
var config = Configuration.Instance;
if (config.RetainAaxFiles)
{
var newAaxFilename = FileUtility.GetValidFilename(
destinationDir,
Path.GetFileNameWithoutExtension(aaxFilename),
"aax");
File.Move(aaxFilename, newAaxFilename);
}
else
{
Dinah.Core.IO.FileExt.SafeDelete(aaxFilename);
}
var statusHandler = new StatusHandler();
var finalAudioExists = AudibleFileStorage.Audio.Exists(libraryBook.Book.AudibleProductId);
if (!finalAudioExists)
{
statusHandler.AddError("Cannot find final audio file after decryption");
}
return(statusHandler);
}
finally
{
Completed?.Invoke(this, libraryBook);
}
}
