/// <summary>
/// Reads all entries from existing archive log file
/// </summary>
public void ReadAllEntries()
{
// Read entries
FileStream stream = File.OpenRead(this.path);
while (stream.Position < (stream.Length - 1))
{
// Read line
List <byte> encodedLine = new List <byte>();
while (true)
{
byte b = (byte)stream.ReadByte();
if (b == '\n')
{
break;
}
else
{
encodedLine.Add(b);
}
}
// Process line into an entry and store
ArchiveLogEntry entry = new ArchiveLogEntry(
Encoding.UTF8.GetString(encodedLine.ToArray())
);
this.entries.Add(entry.path, entry);
}
// Mark as not empty
this.empty = false;
}
/// <summary>
/// Writes an entry into the archive log
/// </summary>
/// <param name="entry"></param>
public void WriteEntry(ArchiveLogEntry entry)
{
// Write entry to file
byte[] logLine = Encoding.UTF8.GetBytes(
String.Format("{0}\n", entry.ToString())
);
this.stream.Write(logLine, 0, logLine.Length);
// Store entry
this.entries.Add(entry.path, entry);
// Update empty status
this.empty = false;
}
/// <summary>
/// Writes a file to archive
/// </summary>
/// <param name="dirPath">Path to the root directory of the file being archived</param>
/// <param name="filePath">Relative path within the root directory of the file being archived</param>
/// <returns>File status</returns>
public ArchiveLogFileArchivingStatus WriteFile(string dirPath, string filePath)
{
if (this.zip == null)
{
throw new Exception("Can't write to archive before opening it! Call .Create() first!");
}
else
{
// Get file info
string fullPath = String.Format("{0}{1}", dirPath, filePath);
FileInfo info = new FileInfo(fullPath);
ArchiveLogEntry currentEntry = new ArchiveLogEntry()
{
path = filePath,
mtime = (info.CreationTimeUtc > info.LastWriteTimeUtc ? info.CreationTimeUtc : info.LastWriteTimeUtc).ToFileTimeUtc(),
size = info.Length,
};
// Check if file changed since last backup
ArchiveLogEntry previousEntry = (this.previousLog != null ? this.previousLog.FindEntry(filePath) : null);
if (previousEntry != null)
{
if ((previousEntry.status != ArchiveLogFileArchivingStatus.DELETED) && (currentEntry.mtime == previousEntry.mtime) && (currentEntry.size == previousEntry.size))
{
// File unchanged - set status and copy archive path
currentEntry.status = ArchiveLogFileArchivingStatus.UNCHANGED;
currentEntry.archive = previousEntry.archive;
}
else if (previousEntry.status == ArchiveLogFileArchivingStatus.DELETED)
{
// File recreated - set status and archive path
currentEntry.status = ArchiveLogFileArchivingStatus.CREATED;
currentEntry.archive = this.archiveName;
}
else
{
// File changed - set status and archive path
currentEntry.status = ArchiveLogFileArchivingStatus.CHANGED;
currentEntry.archive = this.archiveName;
}
}
else
{
// File created - set status and archive path
currentEntry.status = ArchiveLogFileArchivingStatus.CREATED;
currentEntry.archive = this.archiveName;
}
// Check if file needs to be archived
if ((currentEntry.status == ArchiveLogFileArchivingStatus.CREATED) || (currentEntry.status == ArchiveLogFileArchivingStatus.CHANGED))
{
// Add file entry to archive
zip.CreateEntryFromFile(fullPath, filePath, Archive.compression);
// Updated empty status
this.empty = false;
}
// Log file entry information
this.currentLog.WriteEntry(currentEntry);
// Return file status
return(currentEntry.status);
}
}
