OpenSim-Test/OpenSim/Region/Environment/Modules/World/Archiver/AssetsArchiver.cs

/*
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 *
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 * modification, are permitted provided that the following conditions are met:
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 *       names of its contributors may be used to endorse or promote products
 *       derived from this software without specific prior written permission.
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 * THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY
 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
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using System.Collections.Generic;
using System.IO;
using System.Reflection;
using System.Xml;
using libsecondlife;
using log4net;
using OpenSim.Framework;

namespace OpenSim.Region.Environment.Modules.World.Archiver
{
    /// <summary>
    /// Archives assets
    /// </summary>
    public class AssetsArchiver
    {
        private static readonly ILog m_log = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);
        
        /// <summary>
        /// Archive assets
        /// </summary>
        protected IDictionary<LLUUID, AssetBase> m_assets;
        
        public AssetsArchiver(IDictionary<LLUUID, AssetBase> assets)
        {
            m_assets = assets;
        }
        
        /// <summary>
        /// Archive the assets given to this archiver to the given archive.
        /// </summary>
        /// <param name="archive"></param>
        public void Archive(TarArchiveWriter archive)
        {
            //WriteMetadata(archive);
            WriteData(archive);
        }

        /// <summary>
        /// Write an assets metadata file to the given archive
        /// </summary>
        /// <param name="archive"></param>
        protected void WriteMetadata(TarArchiveWriter archive)
        {
            StringWriter sw = new StringWriter();
            XmlTextWriter xtw = new XmlTextWriter(sw);
            
            xtw.Formatting = Formatting.Indented;
            xtw.WriteStartDocument();
            
            xtw.WriteStartElement("assets");
            
            foreach (LLUUID uuid in m_assets.Keys)
            {
                AssetBase asset = m_assets[uuid];
                
                if (asset != null)
                {
                    xtw.WriteStartElement("asset");
                    
                    string extension = string.Empty;
                    
                    if (ArchiveConstants.ASSET_TYPE_TO_EXTENSION.ContainsKey(asset.Type))
                    {
                        extension = ArchiveConstants.ASSET_TYPE_TO_EXTENSION[asset.Type];
                    }                    
                    
                    xtw.WriteElementString("filename", uuid.ToString() + extension);
                    
                    xtw.WriteElementString("name", asset.Name);
                    xtw.WriteElementString("description", asset.Description);
                    xtw.WriteElementString("asset-type", asset.Type.ToString());
                    
                    xtw.WriteEndElement();
                }
            }
            
            xtw.WriteEndElement();
            
            xtw.WriteEndDocument();
            
            archive.AddFile("assets.xml", sw.ToString());
        }
        
        /// <summary>
        /// Write asset data files to the given archive
        /// </summary>
        /// <param name="archive"></param>
        protected void WriteData(TarArchiveWriter archive)
        {
            // It appears that gtar, at least, doesn't need the intermediate directory entries in the tar
            //archive.AddDir("assets");
            
            foreach (LLUUID uuid in m_assets.Keys)
            {
                AssetBase asset = m_assets[uuid];
                
                if (asset != null)
                {
                    string extension = string.Empty;
                    
                    if (ArchiveConstants.ASSET_TYPE_TO_EXTENSION.ContainsKey(asset.Type))
                    {
                        extension = ArchiveConstants.ASSET_TYPE_TO_EXTENSION[asset.Type];
                    }
                    
                    archive.AddFile(
                        ArchiveConstants.ASSETS_PATH + uuid.ToString() + extension,
                        asset.Data);
                }
                else
                {
                    m_log.WarnFormat("[ARCHIVER]: Could not find asset {0} to archive", uuid);
                }
            }
        }
    }
}