/// <summary>
/// Creates a backup of the specified files using the specified key.
/// </summary>
/// <param name="backupRoot">Backup root directory.</param>
/// <param name="key">Backup key.</param>
/// <param name="fileNames">Files to backup.</param>
/// <returns>Backup location</returns>
public static string BackupFiles(
string backupRoot,
string key,
IEnumerable <string> fileNames)
{
if (backupRoot == null || backupRoot.Trim().Length == 0)
{
throw new ArgumentException("Invalid backup location", "backupRoot");
}
else if (key == null || key.Trim().Length == 0)
{
throw new ArgumentException("Invalid backup key", "key");
}
if (!Directory.Exists(backupRoot))
{
Directory.CreateDirectory(backupRoot);
}
DateTime backupDate = DateTime.Now;
string dateDirectory = backupDate.ToFileTime().ToString(CultureInfo.InvariantCulture);
string keyRoot = Path.Combine(backupRoot, key);
if (!Directory.Exists(keyRoot))
{
Directory.CreateDirectory(keyRoot);
}
string backupLocation = Path.Combine(keyRoot, dateDirectory);
Directory.CreateDirectory(backupLocation);
string zipFile = Path.Combine(backupLocation, ZipFileName);
// Copy all files to a temporary working directory
string workingDirectory = CreateTempFilePath();
Directory.CreateDirectory(workingDirectory);
try
{
string indexFile = Path.Combine(backupLocation, IndexFileName);
using (FileStream fs = new FileStream(indexFile, FileMode.Create))
{
using (StreamWriter writer = new StreamWriter(fs))
{
foreach (string fileName in fileNames)
{
string fileKey = CreateFileNameKey(fileName);
string fileBackupName = fileKey + "." + ProjectManager.GetExtension(fileName);
writer.WriteLine(fileBackupName + IndexSeparator + fileName);
string fileBackupPath =
Path.Combine(workingDirectory, fileBackupName);
File.Copy(fileName, fileBackupPath);
}
}
}
// Zip up all files to backup
ZipUtilities.Zip(workingDirectory, zipFile);
}
finally
{
TryDeleteDirectory(workingDirectory);
}
return(backupLocation);
}
/// <summary>
/// Restores all files associated with the specified key.
/// </summary>
/// <param name="backupRoot">Backup root directory.</param>
/// <param name="key">Backup key.</param>
/// <returns>A boolean value indicating whether or not the operation was succesful.</returns>
public static bool RestoreFiles(string backupRoot, string key)
{
bool success = false;
if (backupRoot == null || backupRoot.Trim().Length == 0)
{
throw new ArgumentException("Invalid backup location", "backupRoot");
}
else if (key == null || key.Trim().Length == 0)
{
throw new ArgumentException("Invalid backup key", "key");
}
string keyRoot = Path.Combine(backupRoot, key);
// Find the most recent timestamped folder
DirectoryInfo keyDirectory = new DirectoryInfo(keyRoot);
SortedList <string, DirectoryInfo> timestampedDirectories =
new SortedList <string, DirectoryInfo>();
DirectoryInfo[] childDirectories = keyDirectory.GetDirectories();
foreach (DirectoryInfo childDirectory in childDirectories)
{
timestampedDirectories.Add(childDirectory.Name, childDirectory);
}
if (timestampedDirectories.Count > 0)
{
string dateDirectory = timestampedDirectories.Values[timestampedDirectories.Count - 1].Name;
string backupLocation = Path.Combine(keyRoot, dateDirectory);
string zipFile = Path.Combine(backupLocation, ZipFileName);
// Extract all files to a temporary working directory
string workingDirectory = CreateTempFilePath();
Directory.CreateDirectory(workingDirectory);
try
{
// Unzip and copy all files to restore
ZipUtilities.Unzip(zipFile, workingDirectory);
string indexFile = Path.Combine(backupLocation, IndexFileName);
using (FileStream fs = new FileStream(indexFile, FileMode.Open))
{
using (StreamReader reader = new StreamReader(fs))
{
while (!reader.EndOfStream)
{
string line = reader.ReadLine();
int separatorIndex = line.IndexOf(IndexSeparator);
string fileBackupName = line.Substring(0, separatorIndex);
string fileBackupPath =
Path.Combine(workingDirectory, fileBackupName);
string restorePath = line.Substring(separatorIndex + 1);
string backupText = File.ReadAllText(fileBackupPath);
string restoreText = null;
if (File.Exists(restorePath))
{
restoreText = File.ReadAllText(restorePath);
File.SetAttributes(restorePath, FileAttributes.Normal);
}
if (backupText != restoreText)
{
File.Copy(fileBackupPath, restorePath, true);
}
}
}
}
// Remove the restored backup so that a consecutive restore
// will process the next in the history
Directory.Delete(backupLocation, true);
success = true;
}
finally
{
TryDeleteDirectory(workingDirectory);
}
}
return(success);
}
