//public IEnumerator GetEnumerator() {
// foreach (object o in Nodes.Values.ToList()) {
// if (o == null) {
// break;
// }
// yield return o;
// }
// }
#endregion "Accessors"
/// <summary>
/// Creates a virtual node to display, linking 'up' a level in the tree
/// </summary>
/// <param name="current">Current <PRTableNode>PRTableNode</PRTableNode> from which to generate the virtual 'up' node</param>
/// <returns><PRTableNode>PRTableNode</PRTableNode></returns>
public PRTableNode GetVirtualUpNode(PRTableNode current)
{
PRTableNode virtualUP = PRTableNode.CreateUp(new PRNode("Up", Guid.Empty));
virtualUP.GUID = GetPPGuid(current.GUID);
virtualUP.Name = Utils.StringToBase("Up");
virtualUP.Node.Flags = NodeFlag.Directory;
return(virtualUP);
}
/// <summary>
/// Adds an orphan <PRTableNode><PRTableNode></PRTableNode> to the FileTable
/// </summary>
/// <param name="node">PRTableNode to insert</param>
/// <returns><ErrCode>ErrCode</ErrCode></returns>
public ErrCode Add(PRTableNode node)
{
//Log($"Adding PRTNode {node.Name}", LogType.Info);
if (Nodes.Values.Contains(node))
{
return(ErrCode.APP_DUPLICATE_NODE);
}
else
{
Nodes.Add(node.GUID, node);
return(ErrCode.SUCCESS);
}
}
/// <summary>
/// Extract specified PRNode to specified file/path
/// </summary>
/// <param name="node">Node to extract</param>
/// <param name="path"></param>
/// <returns><errcode>Result</errcode></returns>
private ErrCode ExFile(PRNode node, DirectoryInfo path, ProgressTracker pt, string altName = "")
{
Log($"Creating streams for IO ..", LogType.Init);
PRTableNode prt = node.TableNode;
string fName = altName == "" ? prt.DisplayName : altName;
FileStream output = new FileStream(Path.Combine(path.FullName, fName), FileMode.Create);
BinaryWriter bw = new BinaryWriter(output);
PRXSwapFile.Seek(prt.Offset, 0);
// create a hash algorithm to be used in the while(read) loop
HashAlgorithm hasher = new MD5CryptoServiceProvider();
long bytesRead;
long tbr = 0;
long bytesToRead = prt.SizeUncompressed;
var buffer = new byte[Utils.IO_BUFFER_SIZE];
Log($"Writing data..", LogType.IO);
long bytesSoFar = 0;
while (bytesToRead > 0)
{
long bytesLeft = prt.SizeUncompressed - bytesSoFar;
long bufSize = bytesToRead > Utils.IO_BUFFER_SIZE ? Utils.IO_BUFFER_SIZE : bytesLeft;
bytesRead = PRXSwapFile.Read(buffer, 0, (int)bufSize);
bytesSoFar += bytesRead;
hasher.TransformBlock(buffer, 0, (int)bufSize, null, 0);
bytesToRead -= bytesRead;
tbr += bytesRead;
bw.Write(buffer, 0, (int)bytesRead);
}
hasher.TransformFinalBlock(new byte[0], 0, 0);
byte[] hash = hasher.Hash;
if (HashToHex(hash) == prt.Hash)
{
Log($"Ex OK [{prt.HashString}]", LogType.Info);
pt[node] = ErrCode.SUCCESS;
return(ErrCode.SUCCESS);
}
else
{
Log($"Fail! [{prt.Hash}]", LogType.Critical);
pt[node] = ErrCode.APP_FAIL_HASH;
return(ErrCode.APP_FAIL_HASH);
}
}
/// <summary>
/// Initializes the MasterFileTable and instantiates a virtual 'root' from which all nodes are descended
/// </summary>
public PRTable()
{
Log("MasterFileTable initialize and set virtual toplevel node", LogType.FTable);
Nodes = new Dictionary <Guid, PRTableNode>();
PRTableNode prt = PRTableNode.CreateUp(RootNode);
Encoding enc = System.Text.Encoding.UTF8;
prt.GUID = RootNode.GUID;
prt.Parent = RootNode.GUID;
prt.DateCreated = 0;
prt.DateModified = 0;
prt.Attribs = Attrib.Root;
prt.NameLength = Convert.ToBase64String(enc.GetBytes("/")).Length;
prt.Name = Convert.ToBase64String(enc.GetBytes("/"));
Nodes.Add(prt.GUID, prt);
}
/// <summary>
/// Add a file to the prx archive beneath specified node
/// </summary>
/// <param name="file">File to be added</param>
/// <param name="parent">Parent node of added file</param>
/// <returns><errcode>Result</errcode></returns>
private ErrCode AddFile(string file, ProgressTracker progress, PRNode parent)
{
ErrCode err = ErrCode.NULL;
if (!File.Exists(file))
{
err = ErrCode.APP_FAIL_TO_READ;
return(err);
}
// forcefully demand read access to the target file, returning ErrCode.EX_ACCESS_DENIED if this fails
try {
new FileIOPermission(FileIOPermissionAccess.Read, file).Demand();
}
catch (SecurityException se) {
err = ErrCode.EX_ACCESS_DENIED;
return(MapExceptionName(se));
}
catch (NullReferenceException ex) {
Log($"Ex: {MapExceptionName(ex)}", LogType.Error);
}
long startOfWrite = 0;
FileInfo fi = new FileInfo(file);
PRNode node = new PRNode(fi.Name, parent.GUID);
PRTableNode prtn = new PRTableNode(fi, node, fi.Name, parent.GUID);
FileStream fs = null;
node.AssignTableNode(prtn);
//TODO Refactor this to a BinaryWriter extension: BinaryWriter.Write(PRNode)
try {
BinaryWriter bw = new BinaryWriter(PRXSwapFile);
fs = new FileStream(fi.FullName, FileMode.Open);
// jump to the end of the swap file
bw.Seek(0, SeekOrigin.End);
startOfWrite = bw.BaseStream.Position;
node.TableNode.SizeUncompressed = fi.Length;
// write the data header
bw.Write(node.GUID.ToByteArray());
bw.Write(new string('X', 16)); // we write a spacer for the hash that'll be inserted after we actually parse the data
bw.Write((ulong)fi.Length);
long dataOffset = bw.BaseStream.Position;
node.TableNode.Offset = (long)dataOffset;
// create a hash algorithm to be used in the while(read) loop
HashAlgorithm hasher = new MD5CryptoServiceProvider();
int bytesRead;
var buffer = new byte[Utils.IO_BUFFER_SIZE];
progress.BytesProcessedInFile = 0;
progress.TotalBytesInFile = fi.Length;
while ((bytesRead = fs.Read(buffer, 0, buffer.Length)) > 0)
{
progress.BytesProcessed += bytesRead;
progress.BytesProcessedInFile += bytesRead;
//TODO encrypt/compress data [optional]
bw.Write(buffer, 0, bytesRead);
hasher.TransformBlock(buffer, 0, bytesRead, null, 0);
ProgressReport(progress);
}
hasher.TransformFinalBlock(new byte[0], 0, 0);
byte[] hash = hasher.Hash;
prtn.Hash = HashToHex(hash);
PRXSwapFile.Seek(dataOffset - 24, SeekOrigin.Begin);
//bw.Seek(dataOffset - 24, SeekOrigin.Begin);
PRXSwapFile.Write(hash, 0, hash.Length);
//bw.Write(hash);
//Log($"Wrote {progress.BytesProcessedInFile}b [{prtn.HashString}] at offset: {dataOffset}, EOD: {bw.BaseStream.Position}", LogType.IO);
// move back to the end of the stream just for safety
bw.Seek(0, SeekOrigin.End);
PRXSwapFile.Seek(0, SeekOrigin.End);
//BUG Not properly inserting all files anymore.. WTF
//INFO Have to close the BinaryWriter without colosing the underlying stream.. F**K.
//bw.Dispose();
// supposedly the binarywriter is closed *WITHOUT* nuking PRXSwapFile..
}
catch (Exception ex) {
//TODO remove whatever may have been written in the event of a failure
// this'll be added at a later date when I'm able to produce an error
//Log($"EX: {MapExceptionName(ex)} on {fi.Name} in {fi.DirectoryName}", LogType.Exception);
return(MapExceptionName(ex));
}
finally {
fs.Dispose();
//GC.Collect(1); //Cardinal sin, I know.. But I can't dispose of the binarywriter, has to be collected so it won't close PRXSwapFile
}
// increment the number of files processed in our tracker
progress.FilesProcessed++;
// finally, if and only if this is ErrCode.SUCCESS- add the node as a TableNode to our FileTable
if (err == ErrCode.NULL)
{
FileTable.Add(prtn);
}
return(ErrCode.SUCCESS);
}
/// <summary>
/// Adds a directory entry to the archive
/// </summary>
/// <param name="dir">Directory to be added</param>
/// <param name="progress">ProgressTracker</param>
/// <param name="parent">Parent node of which this node belongs</param>
/// <returns>ErrCode</returns>
private PRNode AddDirectory(DirectoryInfo di, ProgressTracker progress, PRNode parent)
{
PRNode retVal = new PRNode(di, parent.GUID);
PRTableNode prtn = new PRTableNode(di, retVal, di.Name, parent.GUID);
FileTable.Add(prtn);
//BUG Directories aren't actually written to the archive, dumbass.
#region failure
//long startOfWrite = 0;
//retVal.AssignTableNode(prtn);
//try {
// BinaryWriter bw = new BinaryWriter(PRXSwapFile);
// bw.Seek(0, SeekOrigin.End);
// startOfWrite = bw.BaseStream.Position;
// bw.Write(retVal.GUID.ToByteArray());
// bw.Write(new string('X', 16)); // we write a spacer for the hash that'll be inserted after we actually parse the data
// bw.Write((short)retVal.TableNode.DisplayName.Length);
// long dataOffset = bw.BaseStream.Position;
// retVal.TableNode.Offset = (long)dataOffset;
// // create a hash algorithm to be used in the while(read) loop
// HashAlgorithm hasher = new MD5CryptoServiceProvider();
// int bytesRead;
// var buffer = new byte[Utils.IO_BUFFER_SIZE];
// progress.BytesProcessedInFile = 0;
// progress.TotalBytesInFile = fi.Length;
// while ((bytesRead = fs.Read(buffer, 0, buffer.Length)) > 0) {
// progress.BytesProcessed += bytesRead;
// progress.BytesProcessedInFile += bytesRead;
// //TODO encrypt/compress data [optional]
// bw.Write(buffer, 0, bytesRead);
// hasher.TransformBlock(buffer, 0, bytesRead, null, 0);
// ProgressReport(progress);
// }
// hasher.TransformFinalBlock(new byte[0], 0, 0);
// byte[] hash = hasher.Hash;
// prtn.Hash = HashToHex(hash);
// PRXSwapFile.Seek(dataOffset - 24, SeekOrigin.Begin);
// //bw.Seek(dataOffset - 24, SeekOrigin.Begin);
// PRXSwapFile.Write(hash, 0, hash.Length);
// //bw.Write(hash);
// //Log($"Wrote {progress.BytesProcessedInFile}b [{prtn.HashString}] at offset: {dataOffset}, EOD: {bw.BaseStream.Position}", LogType.IO);
// // move back to the end of the stream just for safety
// bw.Seek(0, SeekOrigin.End);
// PRXSwapFile.Seek(0, SeekOrigin.End);
// //BUG Not properly inserting all files anymore.. WTF
// //INFO Have to close the BinaryWriter without colosing the underlying stream.. F**K.
// //bw.Dispose();
// // supposedly the binarywriter is closed *WITHOUT* nuking PRXSwapFile..
// }
//catch (Exception ex) {
// //TODO remove whatever may have been written in the event of a failure
// // this'll be added at a later date when I'm able to produce an error
// //Log($"EX: {MapExceptionName(ex)} on {fi.Name} in {fi.DirectoryName}", LogType.Exception);
// return MapExceptionName(ex);
// }
//finally {
// fs.Dispose();
// //GC.Collect(1); //Cardinal sin, I know.. But I can't dispose of the binarywriter, has to be collected so it won't close PRXSwapFile
// }
#endregion failure
return(retVal);
}
public ErrCode AssignTableNode(PRTableNode prtn)
{
this._TableNode = prtn;
return(ErrCode.SUCCESS);
}
/// <summary>
/// Creates a virtual UP table node for navigation purposes
/// </summary>
/// <param name="n">Virual PRNode from which to base this</param>
/// <returns>Virtual PRTableNode (that doesn't exist in the file table)</returns>
public static PRTableNode CreateUp(PRNode n)
{
PRTableNode prtn = new PRTableNode(n);
return(prtn);
}