private void DownloadBook(DownloadItemDataModel item)
{
try
{
using (var isostore = IsolatedStorageFile.GetUserStoreForApplication())
{
for (;;)
{
var fileLoader = _fileLoadingFactory.GetFileLoader(item.DataSourceID, item.IsTrial);
if (fileLoader == null)
{
throw new Exception(DATA_SOURCE_NOT_FOUND_MESSAGE);
}
try
{
var file = fileLoader.LoadFile(item.Path, item.IsZip);
SaveToFile(PrepareFilePath(item, isostore), file);
SetItemStatus(item, DownloadStatus.Parsing);
break;
}
catch (RestartException)
{
}
}
}
}
catch (Exception exception)
{
HandleDownloadException(item, exception);
}
}
private void BookDownloaderOnDownloadCompleted(object sender, DownloadItemDataModel downloadItemDataModel)
{
_eventAggregator.Publish(new BookDownloaded(downloadItemDataModel));
var catalogBookItemModel = new CatalogBookItemModel();
catalogBookItemModel.Id = downloadItemDataModel.CatalogItemId;
catalogBookItemModel.Title = downloadItemDataModel.Name;
catalogBookItemModel.Author = downloadItemDataModel.Author;
catalogBookItemModel.Description = downloadItemDataModel.Description;
if (!string.IsNullOrWhiteSpace(downloadItemDataModel.AcquisitionUrl))
{
catalogBookItemModel.AcquisitionLink = new BookAcquisitionLinkModel
{
Url = downloadItemDataModel.AcquisitionUrl,
Type = downloadItemDataModel.AcquisitionType,
Prices = BookAcquisitionLinkModel.ParsePrices(downloadItemDataModel.AcquisitionPrices)
};
}
if (downloadItemDataModel.IsTrial)
{
catalogBookItemModel.TrialLink = new BookDownloadLinkModel
{
Url = downloadItemDataModel.Path,
Type = downloadItemDataModel.Type
};
}
_notificationsService.ShowToast(UIStrings.BookDownloader_Success, downloadItemDataModel.Name, _navigationService.UriFor <ReadPageViewModel>()
.WithParam(vm => vm.BookId, downloadItemDataModel.BookID.ToString())
.WithParam(vm => vm.CatalogId, downloadItemDataModel.DataSourceID)
.WithParam(vm => vm.CatalogBookItemKey, TransientStorage.Put(catalogBookItemModel))
.WithParam(vm => vm.TokenOffset, 0).BuildUri());
}
private void SaveBook(DownloadItemDataModel item, BookSummary bookSummary, IBookSummaryParser previewGenerator, IsolatedStorageFile storeForApplication)
{
using (var imageStorageFileStream = new IsolatedStorageFileStream(CreateImagesPath(item), FileMode.Create, storeForApplication))
{
previewGenerator.SaveImages(imageStorageFileStream);
}
previewGenerator.SaveCover(item.BookID.ToString());
var book = CreateBook(item, bookSummary);
try
{
_bookService.Add(book);
TokensTool.SaveTokens(book, previewGenerator);
book.Hidden = book.Trial;
_bookService.Save(book);
IsolatedStorageSettings.ApplicationSettings.Save();
}
catch (Exception)
{
_bookService.Remove(book.BookID);
throw;
}
}
private bool ProcessBook(DownloadItemDataModel item)
{
if (item.Canceled)
{
return(false);
}
if (item.Status == DownloadStatus.Error)
{
return(false);
}
if (item.Status == DownloadStatus.Pending)
{
SetItemStatus(item, DownloadStatus.Downloading);
return(ProcessBook(item));
}
if (item.Status == DownloadStatus.Downloading)
{
DownloadBook(item);
return(ProcessBook(item));
}
if (item.Status == DownloadStatus.Parsing)
{
ParseBook(item);
return(ProcessBook(item));
}
return(item.Status == DownloadStatus.Completed);
}
private void OnDownloadError(DownloadItemDataModel book)
{
var handler = DownloadError;
if (handler != null)
{
handler(this, book);
}
}
private static void HandleDownloadException(DownloadItemDataModel item, Exception exception)
{
if (exception is ThreadAbortException)
{
throw exception;
}
SetItemStatus(item, DownloadStatus.Error);
}
private void BookDownloaderOnDownloadError(object sender, DownloadItemDataModel downloadItemDataModel)
{
_eventAggregator.Publish(new BookDownloaded(downloadItemDataModel));
_notificationsService.ShowToast(
UIStrings.BookDownloader_Error,
downloadItemDataModel.Name,
_navigationService.UriFor <DownloadListPageViewModel>().BuildUri());
}
private void OnDownloadCompleted(DownloadItemDataModel book)
{
var handler = DownloadCompleted;
if (handler != null)
{
handler(this, book);
}
}
public bool DownloadBook(CatalogBookItemModel catalogBookItemModel, int catalogId, bool fullBook = true)
{
var link = fullBook
? GetDownloadLink(catalogBookItemModel.Links.ToArray())
: GetDownloadLink(catalogBookItemModel.TrialLink);
if (link == null)
{
return(false);
}
if (!_bookDownloader.IsStarted)
{
_bookDownloader.Start();
}
var downloadModel = new BookDownloadModel
{
Path = link.Url,
Type = GetBookType(link.Type),
IsZip = CheckIsZip(link.Type),
Name = catalogBookItemModel.Title,
Author = catalogBookItemModel.Author,
Description = catalogBookItemModel.Description,
AcquisitionUrl = catalogBookItemModel.AcquisitionLink != null ? catalogBookItemModel.AcquisitionLink.Url : null,
AcquisitionType = catalogBookItemModel.AcquisitionLink != null ? catalogBookItemModel.AcquisitionLink.Type : null,
AcquisitionPrices = catalogBookItemModel.AcquisitionLink != null?catalogBookItemModel.AcquisitionLink.ToString() : null,
DataSourceID = catalogId,
IsTrial = !fullBook,
CatalogItemId = catalogBookItemModel.Id
};
int oldQueueCount = _container.Count;
_bookDownloadsRepository.Add(downloadModel);
var downloadViewModel = new DownloadItemDataModel(downloadModel);
_container.Enqueue(downloadViewModel);
if (_container.Count == oldQueueCount)
{
int index = _container.GetDataModelIndex(downloadViewModel);
if (index > -1)
{
var viewModel = _container.Items[index];
if (viewModel.Status == DownloadStatus.Error)
{
viewModel.Status = DownloadStatus.Pending;
_bookDownloadsRepository.Remove(downloadModel.DownloadID);
}
}
}
return(true);
}
private static void RemoveItem(DownloadItemDataModel item, IDownloadsContainer downloads)
{
var wait = new AutoResetEvent(false);
Execute.OnUIThread((() =>
{
downloads.Remove(item);
wait.Set();
}));
wait.WaitOne();
}
private static void SetItemStatus(DownloadItemDataModel item, DownloadStatus status)
{
var wait = new AutoResetEvent(false);
Execute.OnUIThread(() =>
{
item.Status = status;
wait.Set();
});
wait.WaitOne();
}
private void HandleBookDownloading(DownloadItemDataModel downloadItemDataModel, IDownloadsContainer instance)
{
if (ProcessBook(downloadItemDataModel))
{
RemoveItem(downloadItemDataModel, instance);
_bookDownloadsRepository.Remove(downloadItemDataModel.DownloadID);
OnDownloadCompleted(downloadItemDataModel);
}
else if (downloadItemDataModel.Status == DownloadStatus.Error)
{
OnDownloadError(downloadItemDataModel);
}
}
private static string PrepareFilePath(DownloadItemDataModel item, IsolatedStorageFile storage)
{
if (item.BookID == Guid.Empty || !storage.DirectoryExists(item.BookID.ToString()))
{
item.BookID = CreateFolder(storage);
}
var bookPath = CreateBookPath(item);
if (storage.FileExists(bookPath))
{
storage.DeleteFile(bookPath);
}
return(bookPath);
}
private void ParseBook(DownloadItemDataModel item)
{
try
{
if (item.BookID == Guid.Empty)
{
throw new Exception(BOOK_HAS_NO_ID_MESSAGE);
}
using (var storeForApplication = IsolatedStorageFile.GetUserStoreForApplication())
{
using (var bookStorageFileStream = new IsolatedStorageFileStream(CreateBookPath(item), FileMode.Open, storeForApplication))
{
var previewGenerator = BookFactory.GetPreviewGenerator(item.Type, item.Name, bookStorageFileStream);
var bookSummary = previewGenerator.GetBookPreview();
var trialBook = _bookService.GetTrials().SingleOrDefault(t => t.CatalogItemId == item.CatalogItemId);
if (trialBook != null)
{
_bookService.Remove(trialBook.BookID);
}
if (string.IsNullOrEmpty(bookSummary.UniqueID) || _bookService.CheckUniqueId(bookSummary.UniqueID))
{
SaveBook(item, bookSummary, previewGenerator, storeForApplication);
}
else
{
DeleteUnnecessaryInfo(item, bookSummary);
}
SetItemStatus(item, DownloadStatus.Completed);
}
}
}
catch (SharpZipBaseException)
{
SetItemStatus(item, DownloadStatus.Error);
}
catch (Exception)
{
SetItemStatus(item, DownloadStatus.Error);
}
}
private static BookModel CreateBook(DownloadItemDataModel item, BookSummary bookSummary)
{
var book = new BookModel
{
BookID = item.BookID.ToString(),
Title = bookSummary.Title.SafeSubstring(1024),
Author = bookSummary.AuthorName.SafeSubstring(1024),
Type = item.Type,
Hidden = true,
Trial = item.IsTrial,
Deleted = false,
CreatedDate = DateTime.Now.ToFileTimeUtc(),
UniqueID = bookSummary.UniqueID.SafeSubstring(1024),
Description = bookSummary.Description,
Language = bookSummary.Language,
Url = item.Path,
CatalogItemId = item.CatalogItemId
};
return(book);
}
private void DeleteUnnecessaryInfo(DownloadItemDataModel item, BookSummary bookSummary)
{
_bookService.Remove(item.BookID.ToString());
if (string.IsNullOrEmpty(bookSummary.UniqueID))
{
return;
}
var bookModel = _bookService.GetBookByUniqueId(bookSummary.UniqueID);
if (bookModel == null)
{
return;
}
try
{
item.BookID = Guid.Parse(bookModel.BookID);
}
catch (Exception)
{
}
}
public BookDownloaded(DownloadItemDataModel book)
{
Book = book;
}
public void Restart(DownloadItemDataModel item)
{
item.Status = DownloadStatus.Pending;
}
private static string CreateBookPath(DownloadItemDataModel item)
{
return(Path.Combine(item.BookID.ToString(), ModelConstants.BOOK_FILE_DATA_PATH));
}
public void Remove(DownloadItemDataModel item)
{
_bookDownloadsRepository.Remove(item.DownloadID);
}
private static string CreateImagesPath(DownloadItemDataModel item)
{
return(Path.Combine(item.BookID.ToString(), ModelConstants.BOOK_IMAGES_FILE_NAME));
}
