/// <summary>
/// Verifies the downloaded mod's checksum, and throws an IOException if it doesn't match the database one.
/// </summary>
/// <param name="update">The mod info from the database</param>
/// <param name="filePath">The path to the file to check</param>
public static void VerifyChecksum(ModUpdateInfo update, string filePath)
{
string actualHash = BitConverter.ToString(Everest.GetChecksum(filePath)).Replace("-", "").ToLowerInvariant();
string expectedHash = update.xxHash[0];
Logger.Log("ModUpdaterHelper", $"Verifying checksum: actual hash is {actualHash}, expected hash is {expectedHash}");
if (expectedHash != actualHash)
{
throw new IOException($"Checksum error: expected {expectedHash}, got {actualHash}");
}
}
/// <summary>
/// Installs a mod update in the Mods directory once it has been downloaded.
/// This method will replace the installed mod zip with the one that was just downloaded.
/// </summary>
/// <param name="update">The update info coming from the update server</param>
/// <param name="mod">The mod metadata from Everest for the installed mod</param>
/// <param name="zipPath">The path to the zip the update has been downloaded to</param>
public static void InstallModUpdate(ModUpdateInfo update, EverestModuleMetadata mod, string zipPath)
{
// let's close the zip, as we will replace it now.
foreach (ModContent content in Everest.Content.Mods)
{
if (content.GetType() == typeof(ZipModContent) && (content as ZipModContent).Path == mod.PathArchive)
{
ZipModContent modZip = content as ZipModContent;
Logger.Log("ModUpdaterHelper", $"Closing mod .zip: {modZip.Path}");
modZip.Dispose();
}
}
// delete the old zip, and move the new one.
Logger.Log("ModUpdaterHelper", $"Deleting mod .zip: {mod.PathArchive}");
File.Delete(mod.PathArchive);
Logger.Log("ModUpdaterHelper", $"Moving {zipPath} to {mod.PathArchive}");
File.Move(zipPath, mod.PathArchive);
}