/// <summary>
/// Find a game in the database that matches the file set and checksums.
/// </summary>
/// <param name="files">File set.</param>
/// <returns>Matched game, or null if no match.</returns>
internal Game FindMatch(GameFileCollection files)
{
if (files == null)
{
throw new ArgumentNullException(nameof(files));
}
// If there are no game data files, then don't return a match
if (files.Count == 0)
{
return(null);
}
// Look at each game data for a match
foreach (var curGame in this.Games)
{
// Check if the number of files match
if (curGame.Files.Count == files.Count)
{
// Assume it's a match, we'll set it to false if any crc doesn't match
bool match = true;
// Check each crc, they have to all match
foreach (GameFile curCrc in curGame.Files)
{
// Check this crc
GameFile crc = files[curCrc.Name];
if (crc == null)
{
// Filename not found, continue with next game
match = false;
break;
}
if (crc.Sha1.Length > 0 && curCrc.Sha1.Length > 0)
{
if (crc.Sha1 != curCrc.Sha1)
{
// Checksum for this file doesn't match, continue with next game
match = false;
break;
}
}
else
{
match = false;
break;
}
}
// All crcs match for this game, so this is it
if (match)
{
return(curGame);
}
}
}
return(null);
}
/// <summary>
/// Get all the files in the specified container that are game data files and calculate
/// the crc for them.
/// </summary>
/// <param name="container">Game container.</param>
/// <returns>List of files.</returns>
internal static GameFileCollection GetFolderGameFiles(IGameContainer container)
{
if (container == null)
{
throw new ArgumentNullException(nameof(container));
}
string[] gameFiles = container.GetGameFiles();
// Calculate the checksum for each game file
GameFileCollection crcs = new GameFileCollection();
foreach (string file in gameFiles)
{
GameFile crc = GameFile.FromFile(container, file);
crcs.Add(crc);
}
return(crcs);
}