/*

* Copyright (c) 2009 Nokia Corporation and/or its subsidiary(-ies). 

* All rights reserved.

* This component and the accompanying materials are made available

* under the terms of "Eclipse Public License v1.0"

* which accompanies this distribution, and is available

* at the URL "http://www.eclipse.org/legal/epl-v10.html".

*

* Initial Contributors:

* Nokia Corporation - initial contribution.

*

* Contributors:

* 

* Description:

*

*/

using System;

using System.Collections.Generic;

using System.Collections.ObjectModel;

using System.Text;

using System.IO;

using SymbianUtils;

using SymbianUtils.Streams;

using SymbianUtils.Tracer;

using SymbianStructuresLib.Compression.Common;

using SymbianImageLib.Common.Content;

using SymbianImageLib.Common.Image;

using SymbianImageLib.Common.Header;

using SymbianImageLib.Common.Streams;

using SymbianImageLib.ROFS.Content;

using SymbianImageLib.ROFS.Header;

using SymbianImageLib.ROFS.Structures;

namespace SymbianImageLib.ROFS.Image

{

    public class SIROFS : SIImage

    {

        #region Constructors

        public SIROFS( ITracer aTracer, Stream aStream, string aName )

            : base( aTracer, new SIStream( aStream ), aName )

        {

            base.Trace( "[SymbianImageROFS] Ctor() - START" );

            iHeader = SIHeaderROF.New( this, aStream );

            ReadFiles();

            base.Trace( "[SymbianImageROFS] Ctor() - END" );

        }

        #endregion

        #region From SIImage

        public override SIHeader Header

        {

            get { return iHeader; }

        }

        #endregion

        #region API

        public static bool IsROFS( Stream aStream )

        {

            bool ret = false;

            //

            try

            {

                ret = SIHeaderROF.IsROFS( aStream );

            }

            catch ( Exception )

            {

            }

            //

            return ret;

        }

        #endregion

        #region Properties

        #endregion

        #region Internal methods

        private void ReadFiles()

        {

            base.Trace( "[SymbianImageROFS] ReadFiles() - reading directory tree..." );

            using ( SymbianStreamReaderLE reader = SymbianStreamReaderLE.New( (Stream) base.Stream ) )

            {

                reader.Seek( iHeader.InternalHeader.DirTreeOffset, SeekOrigin.Begin );

                TRofsDir rootDirectory = new TRofsDir( string.Empty, (uint) reader.Position, reader, this );

                base.Trace( "[SymbianImageROFS] ReadFiles() - converting directory tree to full full paths..." );

                MakeFilesForDirectory( rootDirectory, string.Empty );

            }

        }

        private void MakeFilesForDirectory( TRofsDir aDirectory, string aParentDirectoryName )

        {

            string name = aParentDirectoryName + @"\";

            // Create files

            StringBuilder fullName = new StringBuilder();

            foreach ( TRofsEntry entry in aDirectory )

            {

                fullName.Length = 0;

                fullName.Append( name );

                fullName.Append( entry.Name );

                //

                SIContent file = SIContentFactoryROFS.New( this, fullName.ToString(), entry.FileSize, entry.FileAddress, entry.Uids );

                base.RegisterFile( file );

            }

            // Create files in any subdirs

            foreach ( TRofsDir subdir in aDirectory.SubDirectories )

            {

                MakeFilesForDirectory( subdir, name + subdir.Name );

            }

        }

        #endregion

        #region Data members

        private readonly SIHeaderROF iHeader;

        #endregion

    }

}