/// <summary>
/// Opens the book asynchronously without reading its content. Holds the handle to the EPUB file.
/// </summary>
/// <param name="filePath">path to the EPUB file</param>
/// <returns></returns>
public static async Task <EpubBookRef> OpenBookAsync(string filePath)
{
IFiler filer = DependencyService.Get <IFiler>();
IZipFile zipFile = DependencyService.Get <IZipFile>();
if (!await filer.DoesFileExistAsync(filePath).ConfigureAwait(false))
{
throw new FileNotFoundException("Specified epub file not found.", filePath);
}
IZipArchive epubArchive = await zipFile.OpenReadAsync(filePath).ConfigureAwait(false);
EpubBookRef bookRef = new EpubBookRef(epubArchive);
bookRef.FilePath = filePath;
bookRef.Schema = await SchemaReader.ReadSchemaAsync(epubArchive).ConfigureAwait(false);
bookRef.Title = bookRef.Schema.Package.Metadata.Titles.FirstOrDefault() ?? String.Empty;
bookRef.AuthorList = bookRef.Schema.Package.Metadata.Creators.Select(creator => creator.Creator).ToList();
bookRef.Author = string.Join(", ", bookRef.AuthorList);
bookRef.Content = await Task.Run(() => ContentReader.ParseContentMap(bookRef)).ConfigureAwait(false);
return(bookRef);
}