protected async Task BackupDatabaseAsync(string databaseFilePath, DatabaseBackupFrequency backupFrequency = DatabaseBackupFrequency.Default)
{
if (File.Exists(databaseFilePath))
{
string databaseDirectoryPath = Path.GetDirectoryName(databaseFilePath);
string backupDirectoryPath = Path.Combine(databaseDirectoryPath, "backups");
if (!Directory.Exists(backupDirectoryPath))
{
Directory.CreateDirectory(backupDirectoryPath);
}
bool doBackup = true;
DateTimeOffset lastWriteTime = GetFileLastWriteTime(databaseFilePath);
DateTimeOffset lastBackupWriteTime = GetLastDatabaseBackupTime(backupDirectoryPath);
if (backupFrequency == DatabaseBackupFrequency.Daily && (DateTimeOffset.UtcNow.Date == lastBackupWriteTime.Date))
{
doBackup = false;
}
doBackup = doBackup && lastWriteTime != lastBackupWriteTime;
if (doBackup)
{
string backupFilename = string.Format("{0}-{1}", DateUtilities.GetCurrentTimestamp(), Path.GetFileName(databaseFilePath));
string backupFilePath = Path.Combine(backupDirectoryPath, backupFilename);
await OnLogAsync(Debug.LogSeverity.Info, "Creating database backup " + backupFilePath);
Directory.CreateDirectory("backups");
File.Copy(databaseFilePath, backupFilePath);
}
}
await Task.CompletedTask;
}