/// <inheritdoc/>
public virtual void AfterSave(LockedFile file)
{
Ensure.NotNull(file, nameof(file));
Ensure.ExtensionIsNotAnyOf(file.File, this.BackupExtensions, "file");
file.File.DeleteSoftDeleteFileFor();
var allBackups = BackupFile.GetAllBackupsFor(file.File, this.Setting);
if (allBackups.Count == 0)
{
return;
}
foreach (var backup in allBackups)
{
backup.File.DeleteSoftDeleteFileFor();
}
if (this.Setting.NumberOfBackups > 0)
{
// this is not efficient but the number of backups should be low
while (allBackups.Count > this.Setting.NumberOfBackups)
{
var backupToBurge = allBackups.MinBy(x => x.TimeStamp);
backupToBurge.File.HardDelete();
allBackups.Remove(backupToBurge);
}
}
if (this.Setting.MaxAgeInDays > 0 && this.Setting.MaxAgeInDays < int.MaxValue)
{
// this is not efficient but the number of backups should be low
while (true)
{
var backupToBurge = allBackups.MinBy(x => x.TimeStamp);
var days = (DateTime.Now - backupToBurge.TimeStamp).Days;
if (days < this.Setting.MaxAgeInDays)
{
break;
}
backupToBurge.File.HardDelete();
allBackups.Remove(backupToBurge);
}
}
}
/// <inheritdoc/>
public bool CanRestore(FileInfo file)
{
if (file is null)
{
throw new ArgumentNullException(nameof(file));
}
var softDelete = file.SoftDeleteFile();
if (softDelete.Exists)
{
return(true);
}
var backups = BackupFile.GetAllBackupsFor(file, this.Setting);
return(backups.Any());
}
/// <inheritdoc/>
public bool CanRename(FileInfo file, string newName)
{
if (file is null)
{
throw new ArgumentNullException(nameof(file));
}
if (string.IsNullOrEmpty(newName))
{
throw new ArgumentNullException(nameof(newName));
}
var soft = file.SoftDeleteFile();
if (soft.Exists)
{
if (!soft.CanRename(newName, this.Setting))
{
return(false);
}
}
var allBackups = BackupFile.GetAllBackupsFor(file, this.Setting);
foreach (var backup in allBackups)
{
if (!backup.File.CanRename(newName, this.Setting))
{
return(false);
}
soft = backup.File.SoftDeleteFile();
if (soft.Exists)
{
if (!soft.CanRename(newName, this.Setting))
{
return(false);
}
}
}
return(true);
}
// ReSharper disable once UnusedMember.Global
internal virtual void Restore(FileInfo file)
{
Ensure.NotNull(file, nameof(file));
Ensure.ExtensionIsNotAnyOf(file, this.BackupExtensions, "file");
var softDelete = file.WithAppendedExtension(FileHelper.SoftDeleteExtension);
if (softDelete.Exists)
{
this.Restore(file, softDelete);
return;
}
var backup = BackupFile.GetRestoreFileFor(file, this.Setting);
if (backup != null)
{
this.Restore(file, backup);
}
}
/// <inheritdoc />
public IReadOnlyList <RenamePair> GetRenamePairs(FileInfo file, string newName)
{
if (file is null)
{
throw new ArgumentNullException(nameof(file));
}
if (string.IsNullOrEmpty(newName))
{
throw new ArgumentNullException(nameof(newName));
}
var pairs = new List <RenamePair>();
var soft = file.SoftDeleteFile();
if (soft.Exists)
{
var withNewName = soft.WithNewName(newName, new TempFileSettings(file.DirectoryName, file.Extension));
pairs.Add(new RenamePair(soft, withNewName));
}
var allBackups = BackupFile.GetAllBackupsFor(file, this.Setting);
foreach (var backup in allBackups)
{
var withNewName = backup.File.WithNewName(newName, this.Setting);
pairs.Add(new RenamePair(backup.File, withNewName));
soft = backup.File.SoftDeleteFile();
if (soft.Exists)
{
withNewName = soft.WithNewName(newName, this.Setting);
pairs.Add(new RenamePair(soft, withNewName));
}
}
return(pairs);
}
