public static EpubByteContentFileRef ReadBookCover(EpubSchema epubSchema, Dictionary <string, EpubByteContentFileRef> imageContentRefs)
{
List <EpubMetadataMeta> metaItems = epubSchema.Package.Metadata.MetaItems;
if (metaItems == null || !metaItems.Any())
{
return(null);
}
EpubMetadataMeta coverMetaItem = metaItems.FirstOrDefault(metaItem => metaItem.Name.CompareOrdinalIgnoreCase("cover"));
if (coverMetaItem == null)
{
return(null);
}
if (String.IsNullOrEmpty(coverMetaItem.Content))
{
throw new Exception("Incorrect EPUB metadata: cover item content is missing.");
}
EpubManifestItem coverManifestItem = epubSchema.Package.Manifest.FirstOrDefault(manifestItem => manifestItem.Id.CompareOrdinalIgnoreCase(coverMetaItem.Content));
if (coverManifestItem == null)
{
throw new Exception($"Incorrect EPUB manifest: item with ID = \"{coverMetaItem.Content}\" is missing.");
}
if (!imageContentRefs.TryGetValue(coverManifestItem.Href, out EpubByteContentFileRef coverImageContentFileRef))
{
throw new Exception($"Incorrect EPUB manifest: item with href = \"{coverManifestItem.Href}\" is missing.");
}
return(coverImageContentFileRef);
}
public static EpubByteContentFileRef ReadBookCover(EpubSchema epubSchema, Dictionary <string, EpubByteContentFileRef> imageContentRefs)
{
List <EpubMetadataMeta> metaItems = epubSchema.Package.Metadata.MetaItems;
if (metaItems == null || !metaItems.Any())
{
return(null);
}
EpubMetadataMeta coverMetaItem = metaItems.FirstOrDefault(metaItem => metaItem.Name.CompareOrdinalIgnoreCase("cover"));
if (coverMetaItem == null)
{
return(null);
}
if (String.IsNullOrEmpty(coverMetaItem.Content))
{
throw new Exception("Incorrect EPUB metadata: cover item content is missing.");
}
EpubManifestItem coverManifestItem = epubSchema.Package.Manifest.FirstOrDefault(manifestItem => manifestItem.Id.CompareOrdinalIgnoreCase(coverMetaItem.Content));
if (coverManifestItem == null)
{
// 2019-08-20 Hotfix: if coverManifestItem is not found by its Id, then try it with its Href - some ebooks refer to the image directly!
coverManifestItem = epubSchema.Package.Manifest.FirstOrDefault(manifestItem => manifestItem.Href.CompareOrdinalIgnoreCase(coverMetaItem.Content));
if (null == coverManifestItem)
{
throw new Exception($"Incorrect EPUB manifest: item with ID = \"{coverMetaItem.Content}\" is missing.");
}
}
if (imageContentRefs.TryGetValue(coverManifestItem.Href, out EpubByteContentFileRef coverImageContentFileRef))
{
return(coverImageContentFileRef);
}
// 2019-08-21 Fix some ebooks seem to contain more than one item with Id="cover"
// thus we test if there is a second item....
coverManifestItem = epubSchema.Package.Manifest.Where(manifestItem => manifestItem.Id.CompareOrdinalIgnoreCase(coverMetaItem.Content)).Skip(1).FirstOrDefault();;
if (coverManifestItem == null)
{
// 2019-08-20 Hotfix: if coverManifestItem is not found by its Id, then try it with its Href - some ebooks refer to the image directly!
coverManifestItem = epubSchema.Package.Manifest.FirstOrDefault(manifestItem => manifestItem.Href.CompareOrdinalIgnoreCase(coverMetaItem.Content));
if (null == coverManifestItem)
{
throw new Exception($"Incorrect EPUB manifest: item with ID = \"{coverMetaItem.Content}\" is missing.");
}
}
if (imageContentRefs.TryGetValue(coverManifestItem.Href, out EpubByteContentFileRef coverImageContentFileRef2))
{
return(coverImageContentFileRef2);
}
throw new Exception($"Incorrect EPUB manifest: item with href = \"{coverManifestItem.Href}\" is missing.");
}
public static async Task <EpubSchema> ReadSchemaAsync(ZipArchive epubArchive)
{
var result = new EpubSchema();
var rootFilePath = await RootFilePathReader.GetRootFilePathAsync(epubArchive).ConfigureAwait(false);
var contentDirectoryPath = ZipPathUtils.GetDirectoryPath(rootFilePath);
result.ContentDirectoryPath = contentDirectoryPath;
EpubPackage package = await PackageReader.ReadPackageAsync(epubArchive, rootFilePath).ConfigureAwait(false);
result.Package = package;
return(result);
}
public static EpubSchema ReadSchema(ZipArchive epubArchive)
{
EpubSchema result = new EpubSchema();
string rootFilePath = RootFilePathReader.GetRootFilePath(epubArchive);
string contentDirectoryPath = ZipPathUtils.GetDirectoryPath(rootFilePath);
result.ContentDirectoryPath = contentDirectoryPath;
EpubPackage package = PackageReader.ReadPackage(epubArchive, rootFilePath);
result.Package = package;
EpubNavigation navigation = NavigationReader.ReadNavigation(epubArchive, contentDirectoryPath, package);
result.Navigation = navigation;
return(result);
}
public static async Task <EpubSchema> ReadSchemaAsync(ZipArchive epubArchive)
{
EpubSchema result = new EpubSchema();
string rootFilePath = await RootFilePathReader.GetRootFilePathAsync(epubArchive).ConfigureAwait(false);
string contentDirectoryPath = ZipPathUtils.GetDirectoryPath(rootFilePath);
result.ContentDirectoryPath = contentDirectoryPath;
EpubPackage package = await PackageReader.ReadPackageAsync(epubArchive, rootFilePath).ConfigureAwait(false);
result.Package = package;
EpubNavigation navigation = await NavigationReader.ReadNavigationAsync(epubArchive, contentDirectoryPath, package).ConfigureAwait(false);
result.Navigation = navigation;
return(result);
}
public static async Task <EpubSchema> ReadSchemaAsync(ZipArchive epubArchive)
{
EpubSchema result = new EpubSchema();
string rootFilePath = await RootFilePathReader.GetRootFilePathAsync(epubArchive).ConfigureAwait(false);
string contentDirectoryPath = ZipPathUtils.GetDirectoryPath(rootFilePath);
result.ContentDirectoryPath = contentDirectoryPath;
EpubPackage package = await PackageReader.ReadPackageAsync(epubArchive, rootFilePath).ConfigureAwait(false);
result.Package = package;
result.Epub2Ncx = await Epub2NcxReader.ReadEpub2NcxAsync(epubArchive, contentDirectoryPath, package).ConfigureAwait(false);
result.Epub3NavDocument = await Epub3NavDocumentReader.ReadEpub3NavDocumentAsync(epubArchive, contentDirectoryPath, package).ConfigureAwait(false);
return(result);
}
public static EpubByteContentFileRef ReadBookCoverVersion3(EpubSchema epubSchema, Dictionary <string, EpubByteContentFileRef> imageContentRefs)
{
// https://ebookflightdeck.com/handbook/coverimage
var manifestItem = epubSchema.Package.Manifest.FirstOrDefault(m => m.Properties != null && m.Properties.Contains(ManifestProperty.COVER_IMAGE));
if (manifestItem == null)
{
return(null);
}
EpubByteContentFileRef coverImageContentFileRef;
if (manifestItem.Href != null && imageContentRefs.TryGetValue(manifestItem.Href, out coverImageContentFileRef))
{
return(coverImageContentFileRef);
}
return(null);
}
public static async Task <EpubSchema> ReadSchemaAsync(ZipArchive epubArchive)
{
EpubSchema result = new EpubSchema();
// Reading META-INF/container.xml
string rootFilePath = await RootFilePathReader.GetRootFilePathAsync(epubArchive);
// Getting directory path - usually it's: META-INF/
string contentDirectoryPath = ZipPathUtils.GetDirectoryPath(rootFilePath);
result.ContentDirectoryPath = contentDirectoryPath;
//Reading the file content.opf
EpubPackage package = await PackageReader.ReadPackageAsync(epubArchive, rootFilePath);
result.Package = package;
EpubNavigation navigation = await NavigationReader.ReadNavigationAsync(epubArchive, contentDirectoryPath, package);
result.Navigation = navigation;
return(result);
}
public static EpubByteContentFileRef ReadBookCover(EpubSchema epubSchema, Dictionary <string, EpubByteContentFileRef> imageContentRefs)
{
List <EpubMetadataMeta> metaItems = epubSchema.Package.Metadata.MetaItems;
if (metaItems == null || !metaItems.Any())
{
return(null);
}
EpubMetadataMeta coverMetaItem = metaItems.FirstOrDefault(metaItem => metaItem.Name.CompareOrdinalIgnoreCase("cover"));
if (coverMetaItem == null)
{
return(null);
}
if (String.IsNullOrEmpty(coverMetaItem.Content))
{
throw new Exception("Incorrect EPUB metadata: cover item content is missing.");
}
EpubByteContentFileRef coverImageContentFileRef;
EpubManifestItem coverManifestItem = epubSchema.Package.Manifest.FirstOrDefault(manifestItem => manifestItem.Id.CompareOrdinalIgnoreCase(coverMetaItem.Content));
if (null != coverManifestItem?.Href && imageContentRefs.TryGetValue(coverManifestItem.Href, out coverImageContentFileRef))
{
return(coverImageContentFileRef);
}
// For non-standard ebooks, we try several other ways...
if (null != coverManifestItem) // we have found the item but there was no corresponding image ...
{
// some ebooks seem to contain more than one item with Id="cover"
// thus we test if there is a second item, and whether that is an image....
coverManifestItem = epubSchema.Package.Manifest.Where(manifestItem => manifestItem.Id.CompareOrdinalIgnoreCase(coverMetaItem.Content)).Skip(1).FirstOrDefault();;
if (null != coverManifestItem?.Href && imageContentRefs.TryGetValue(coverManifestItem.Href, out coverImageContentFileRef))
{
return(coverImageContentFileRef);
}
}
// we have still not found the item
// 2019-08-20 Hotfix: if coverManifestItem is not found by its Id, then try it with its Href - some ebooks refer to the image directly!
coverManifestItem = epubSchema.Package.Manifest.FirstOrDefault(manifestItem => manifestItem.Href.CompareOrdinalIgnoreCase(coverMetaItem.Content));
if (null != coverManifestItem?.Href && imageContentRefs.TryGetValue(coverManifestItem.Href, out coverImageContentFileRef))
{
return(coverImageContentFileRef);
}
// 2019-08-24 if it is still not found, then try to find an Id named cover
coverManifestItem = epubSchema.Package.Manifest.FirstOrDefault(manifestItem => manifestItem.Id.CompareOrdinalIgnoreCase(coverMetaItem.Name));
if (null != coverManifestItem?.Href && imageContentRefs.TryGetValue(coverManifestItem.Href, out coverImageContentFileRef))
{
return(coverImageContentFileRef);
}
// 2019-08-24 if it is still not found, then try to find it in the guide
var guideItem = epubSchema.Package.Guide.FirstOrDefault(reference => reference.Title.CompareOrdinalIgnoreCase(coverMetaItem.Name));
if (null != guideItem?.Href && imageContentRefs.TryGetValue(guideItem.Href, out coverImageContentFileRef))
{
return(coverImageContentFileRef);
}
throw new Exception($"Incorrect EPUB manifest: item with ID = \"{coverMetaItem.Content}\" is missing or no corresponding image was found.");
}
