private static async System.Threading.Tasks.Task<EpubMetadata> ReadMetadataAsync(XmlReader reader, EpubVersion epubVersion)
{
EpubMetadata result = new EpubMetadata();
result.Titles = new List<string>();
result.Creators = new List<EpubMetadataCreator>();
result.Subjects = new List<string>();
result.Publishers = new List<string>();
result.Contributors = new List<EpubMetadataContributor>();
result.Dates = new List<EpubMetadataDate>();
result.Types = new List<string>();
result.Formats = new List<string>();
result.Identifiers = new List<EpubMetadataIdentifier>();
result.Sources = new List<string>();
result.Languages = new List<string>();
result.Relations = new List<string>();
result.Coverages = new List<string>();
result.Rights = new List<string>();
result.MetaItems = new List<EpubMetadataMeta>();
//Parsing all metadata insides and saving it in EpubMetadata instance
//
//Мне нужно пройтись по всем нодам внутри метадаты последовательно, извлечь ноды указанные в массиве metadataNodesNames...
//... и сохранить их в структуре EpubMetadata
//В каждой итерации нам нужно извлечь имя нода, сделать маленькими буквами и,
// в зависимости от того есть ли он в массиве - выполнить запись в структуру
//ИЛИ мы можем тупо искать по заданным в массиве именам, с опасностью, что какая-то сука написала капсами и это ебнет весь ридер
//
bool isMetadataAvailable = await reader.ReadToFollowingAsync("metadata", "http://www.idpf.org/2007/opf");
if (!isMetadataAvailable)
throw new Exception("EPUB parsing error: metadata not found in the package.");
while (await reader.ReadAsync() && !(reader.NodeType == XmlNodeType.EndElement && reader.LocalName == "metadata"))
{
switch (reader.NodeType)
{
case XmlNodeType.Element:
switch (reader.LocalName.ToLowerInvariant())
{
case "title":
result.Titles.Add(reader.ReadElementContentAsString());
break;
case "creator":
EpubMetadataCreator creator = new EpubMetadataCreator();
creator.Role = reader.GetAttribute("opf:role");
creator.FileAs = reader.GetAttribute("opf:file-as");
creator.Creator = reader.ReadElementContentAsString();
result.Creators.Add(creator);
break;
case "subject":
result.Subjects.Add(reader.ReadElementContentAsString());
break;
case "description":
result.Description = reader.ReadElementContentAsString();
break;
case "publisher":
result.Publishers.Add(reader.ReadElementContentAsString());
break;
case "contributor":
EpubMetadataContributor contributor = new EpubMetadataContributor();
contributor.Role = reader.GetAttribute("opf:role");
contributor.FileAs = reader.GetAttribute("opf:file-as");
contributor.Contributor = reader.ReadElementContentAsString();
result.Contributors.Add(contributor);
break;
case "date":
EpubMetadataDate date = new EpubMetadataDate();
date.Event = reader.GetAttribute("opf:event");
date.Date = reader.ReadElementContentAsString();
result.Dates.Add(date);
break;
case "type":
result.Types.Add(reader.ReadElementContentAsString());
break;
case "format":
result.Formats.Add(reader.ReadElementContentAsString());
break;
case "identifier":
EpubMetadataIdentifier identifier = new EpubMetadataIdentifier();
identifier.Id = reader.GetAttribute("id");
identifier.Scheme = reader.GetAttribute("opf:scheme");
identifier.Identifier = reader.ReadElementContentAsString();
result.Identifiers.Add(identifier);
break;
case "source":
result.Sources.Add(reader.ReadElementContentAsString());
break;
case "language":
result.Languages.Add(reader.ReadElementContentAsString());
break;
case "relation":
result.Relations.Add(reader.ReadElementContentAsString());
break;
case "coverage":
result.Coverages.Add(reader.ReadElementContentAsString());
break;
case "rights":
result.Rights.Add(reader.ReadElementContentAsString());
break;
//looks like there is an optional refining node "meta" and it is present in EPUB3
case "meta":
if (epubVersion == EpubVersion.EPUB_2)
{
EpubMetadataMeta meta = new EpubMetadataMeta();
meta.Name = reader.GetAttribute("name");
meta.Content = reader.GetAttribute("content");
result.MetaItems.Add(meta);
}
else
if (epubVersion == EpubVersion.EPUB_3)
{
EpubMetadataMeta meta = new EpubMetadataMeta();
meta.Id = reader.GetAttribute("id");
meta.Refines = reader.GetAttribute("refines");
meta.Property = reader.GetAttribute("property");
meta.Scheme = reader.GetAttribute("scheme");
meta.Content = reader.ReadElementContentAsString();
result.MetaItems.Add(meta);
}
break;
}
break;
}
}
return result;
}
private static EpubMetadata ReadMetadata(XmlNode metadataNode, EpubVersion epubVersion)
{
EpubMetadata result = new EpubMetadata();
result.Titles = new List<string>();
result.Creators = new List<EpubMetadataCreator>();
result.Subjects = new List<string>();
result.Publishers = new List<string>();
result.Contributors = new List<EpubMetadataContributor>();
result.Dates = new List<EpubMetadataDate>();
result.Types = new List<string>();
result.Formats = new List<string>();
result.Identifiers = new List<EpubMetadataIdentifier>();
result.Sources = new List<string>();
result.Languages = new List<string>();
result.Relations = new List<string>();
result.Coverages = new List<string>();
result.Rights = new List<string>();
result.MetaItems = new List<EpubMetadataMeta>();
foreach (XmlNode metadataItemNode in metadataNode.ChildNodes)
{
string innerText = metadataItemNode.InnerText;
switch (metadataItemNode.LocalName.ToLowerInvariant())
{
case "title":
result.Titles.Add(innerText);
break;
case "creator":
EpubMetadataCreator creator = ReadMetadataCreator(metadataItemNode);
result.Creators.Add(creator);
break;
case "subject":
result.Subjects.Add(innerText);
break;
case "description":
result.Description = innerText;
break;
case "publisher":
result.Publishers.Add(innerText);
break;
case "contributor":
EpubMetadataContributor contributor = ReadMetadataContributor(metadataItemNode);
result.Contributors.Add(contributor);
break;
case "date":
EpubMetadataDate date = ReadMetadataDate(metadataItemNode);
result.Dates.Add(date);
break;
case "type":
result.Types.Add(innerText);
break;
case "format":
result.Formats.Add(innerText);
break;
case "identifier":
EpubMetadataIdentifier identifier = ReadMetadataIdentifier(metadataItemNode);
result.Identifiers.Add(identifier);
break;
case "source":
result.Sources.Add(innerText);
break;
case "language":
result.Languages.Add(innerText);
break;
case "relation":
result.Relations.Add(innerText);
break;
case "coverage":
result.Coverages.Add(innerText);
break;
case "rights":
result.Rights.Add(innerText);
break;
case "meta":
if (epubVersion == EpubVersion.EPUB_2)
{
EpubMetadataMeta meta = ReadMetadataMetaVersion2(metadataItemNode);
result.MetaItems.Add(meta);
}
else
if (epubVersion == EpubVersion.EPUB_3)
{
EpubMetadataMeta meta = ReadMetadataMetaVersion3(metadataItemNode);
result.MetaItems.Add(meta);
}
break;
}
}
return result;
}
