private ModInstallationState ExecuteVerifyTask()
{
UpdateStatus(TaskExecutionStatus.Verify);
// Get files affected by install
UpdateStatus(TaskExecutionStatus.VerifyGetAffectedFiles);
var affectedFiles = _persistenceService.GetAffectedFiles(Task.ModID);
if (!affectedFiles.AnySafe())
{
return(ModInstallationState.NotInstalled);
}
// Normalize affected files
if (affectedFiles.Length > 1)
{
affectedFiles = affectedFiles.StripCommonStart().ToArray();
}
affectedFiles = affectedFiles.Select(f => f.Replace("\\", "/")).ToArray();
// Get verification pairs
UpdateStatus(TaskExecutionStatus.VerifyGetVerificationPairs);
var verificationPairs = _apiService.GetVerificationPairs(Task.ModID);
// Verify files
UpdateStatus(TaskExecutionStatus.VerifyExecute);
foreach (var verificationPair in verificationPairs)
{
if (IsAbortPending)
{
TaskAborted?.Invoke(this, new TaskEventArgs(Task));
return(ModInstallationState.Unknown);
}
// Get file in question
string file = affectedFiles
.Where(f => f.ContainsInvariant(verificationPair.File))
.OrderBy(f => f.Length)
.FirstOrDefault();
if (file.IsBlank())
{
return(ModInstallationState.Corrupt);
}
// Check if exists
if (!File.Exists(file))
{
return(ModInstallationState.Corrupt);
}
// Compare hashes
if (!Ext.CompareFileHash(file, verificationPair.Hash))
{
return(ModInstallationState.Corrupt);
}
UpdateStatus(Progress + 100.0 / verificationPairs.Count);
}
// All checks passed => installed
return(ModInstallationState.Installed);
}