internal static AddonInfo ReadAddonInfo(BinaryReader reader, char gmadFormatVersion)
{
ulong steamid = reader.ReadUInt64(); //steamid
ulong timestamp = reader.ReadUInt64(); //timestamp
var timeUpdated = new EpochTime(( int )timestamp).DateTime;
if (gmadFormatVersion > 1)
{
string content = reader.ReadBootilString();
while (!string.IsNullOrEmpty(content))
{
content = reader.ReadBootilString();
}
}
string gmadTitle = reader.ReadBootilString();
string gmadAddonJson = reader.ReadBootilString(); //gmad reads this first then parses it later to get the actual description
string gmadAuthor = reader.ReadBootilString();
int gmadAddonVersion = reader.ReadInt32();
AddonInfo addonInfo = DeserializeAddonInfoCallback(gmadAddonJson);
addonInfo.Title = gmadTitle;
return(addonInfo);
}
private static string CreateJsonDescription(AddonInfo addonInfo)
{
return(SerializeAddonInfoToStringCallback(new AddonInfo()
{
Description = addonInfo.Description,
Tags = addonInfo.Tags,
WorkshopType = addonInfo.WorkshopType
}));
}
internal static void WriteAddonInfo(BinaryWriter writer, AddonInfo addonInfo, DateTime timestamp)
{
writer.Write(( ulong )0); //unused steamid
writer.Write(( ulong )timestamp.ToEpochTimestamp());
writer.Write(( char )0); //required content, this hasn't been worked on and I doubt it will
writer.WriteBootilString(addonInfo.Title);
writer.WriteBootilString(CreateJsonDescription(addonInfo));
writer.WriteBootilString("Author Name"); //unused author name
writer.Write(1); //unused addon version
}
private static void PopulateOldAddonInfo(AddonInfo addonInfo, AddonInfo newAddonInfo)
{
//populate tags description and type only
addonInfo.Description = newAddonInfo.Description;
addonInfo.WorkshopType = newAddonInfo.WorkshopType;
if (addonInfo.Tags != null)
{
addonInfo.Tags.UnionWith(newAddonInfo.Tags);
}
else
{
addonInfo.Tags = new HashSet <string>(newAddonInfo.Tags);
}
}
/// <summary>
/// Extract the given GMA inputstream
/// </summary>
/// <param name="inputStream">the raw stream of the gma</param>
/// <param name="requestFileStream">the callback to write the output file to, return a null if the path is invalid</param>
/// <param name="addonInfo"> the addon info object to feed info to, saving this is at your discretion</param>
/// <returns></returns>
public static async Task <bool> Extract(Stream inputStream, Func <string, Stream> requestFileStream, AddonInfo addonInfo)
{
inputStream.Position = 0;
using (BinaryReader reader = new BinaryReader(inputStream))
{
var(gmadIdent, gmadFormatVersion) = ReadHeader(reader);
if (!gmadIdent.SequenceEqual(Ident) || gmadFormatVersion > Version)
{
return(false);
}
AddonInfo newAddonInfo = ReadAddonInfo(reader, gmadFormatVersion);
//the term populate here is correct, we don't want to override it again as the object might be one
//passed from an existing file already
PopulateOldAddonInfo(addonInfo, newAddonInfo);
long gmadFileblock = ReadFileList(reader, out var gmadFileEntries);
int badFileCount = 0;
foreach (var entry in gmadFileEntries)
{
var stream = requestFileStream(entry.Name);
if (stream is null)
{
stream = requestFileStream($"badnames/{badFileCount}+.unk");
badFileCount++;
}
if (stream != null)
{
inputStream.Position = gmadFileblock + entry.Offset;
await inputStream.CopyToLimitedAsync(stream, entry.Size);
}
}
uint addoncrc = reader.ReadUInt32(); //not used during the extraction of gmas
}
return(true);
}
public static async Task <bool> Create(Dictionary <string, Stream> files, Stream outputStream, AddonInfo addonInfo)
{
var orderedFiles = files.OrderBy(kv => kv.Key);
using (BinaryWriter buffer = new BinaryWriter(outputStream))
{
WriteHeader(buffer);
WriteAddonInfo(buffer, addonInfo, DateTime.Now);
await WriteFiles(buffer, outputStream, orderedFiles);
//don't write CRC32 as it's not used anywhere
buffer.Write(( uint )0);
}
return(true);
}