static MetaDataTagItem GetElement(int startIndex, byte[] data, string parentFileName, out int updatedByteIndex)
{
if (!ByteParsers.String.TryDecode(data, startIndex, out var tagName, out var strBytesRead, out string error))
{
throw new Exception($"Unable to detect tagname for MetaData element starting at {startIndex} - {error}");
}
int currentIndex = startIndex + strBytesRead;
for (; currentIndex < data.Length; currentIndex++)
{
if (IsAllCapsCaString(currentIndex, data))
{
break;
}
}
var metaTagItem = new MetaDataTagItem()
{
Name = tagName,
};
var start = startIndex + strBytesRead;
updatedByteIndex = currentIndex;
var dataItem = new MetaDataTagItem.Data(parentFileName, data, startIndex + strBytesRead, currentIndex - start);
metaTagItem.DataItems.Add(dataItem);
metaTagItem.Version = dataItem.Version;
return(metaTagItem);
}
public static MetaDataFile ParseFile(PackFile file, PackFileService pf)
{
var fileContent = file.DataSource.ReadData();
var contentLength = fileContent.Count();
MetaDataFile outputFile = new MetaDataFile()
{
FileName = pf.GetFullPath(file),
Version = BitConverter.ToInt32(fileContent, 0)
};
if (outputFile.Version != 2)
{
throw new Exception($"Unknown version - {outputFile.Version} for {outputFile.FileName}");
}
if (contentLength > 8)
{
MetaDataTagItem currentElement = null;
int numElements = BitConverter.ToInt32(fileContent, 4);
int currentIndex = 0 + 8; // First 4 bytes is the number of elements, next 2 is unknown
while (currentIndex != contentLength && (currentElement = GetElement(currentIndex, fileContent, outputFile.FileName, out currentIndex)) != null)
{
outputFile.TagItems.Add(currentElement);
}
if (numElements != outputFile.TagItems.Count)
{
throw new Exception($"Not the expected amount elements. Expected {numElements}, got {outputFile.TagItems.Count}");
}
}
return(outputFile);
}
