InventoryArchiveUtils.cs

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using System;
using System.Collections.Generic;
using System.Reflection;
using System.Text;
using log4net;
using OpenMetaverse;
using OpenSim.Framework;
using OpenSim.Services.Interfaces;

namespace OpenSim.Region.CoreModules.Avatar.Inventory.Archiver
{
    public static class InventoryArchiveUtils
    {
//        private static readonly ILog m_log = LogManager.GetLogger(MethodBase.GetCurrentMethod().DeclaringType);

        // Character used for escaping the path delimter ("\/") and itself ("\\") in human escaped strings
        public static readonly char ESCAPE_CHARACTER = '\\';

        // The character used to separate inventory path components (different folders and items)
        public static readonly char PATH_DELIMITER = '/';

        public static InventoryFolderBase FindFolderByPath(
            IInventoryService inventoryService, UUID userId, string path)
        {
            List<InventoryFolderBase> folders = FindFoldersByPath(inventoryService, userId, path);

            if (folders.Count == 0)
                return null;
            else
                return folders[0];
        }

        public static InventoryFolderBase FindFolderByPath(
            IInventoryService inventoryService, InventoryFolderBase startFolder, string path)
        {
            if (null == startFolder)
                return null;

            List<InventoryFolderBase> folders = FindFoldersByPath(inventoryService, startFolder, path);

            if (folders.Count == 0)
                return null;
            else
                return folders[0];
        }

        public static List<InventoryFolderBase> FindFoldersByPath(
            IInventoryService inventoryService, UUID userId, string path)
        {
            InventoryFolderBase rootFolder = inventoryService.GetRootFolder(userId);

            if (null == rootFolder)
                return new List<InventoryFolderBase>();

            return FindFoldersByPath(inventoryService, rootFolder, path);
        }
        
        public static List<InventoryFolderBase> FindFoldersByPath(
            IInventoryService inventoryService, InventoryFolderBase startFolder, string path)
        {
            List<InventoryFolderBase> foundFolders = new List<InventoryFolderBase>();
            
            if (path == string.Empty)
            {
                foundFolders.Add(startFolder);
                return foundFolders;
            }

            path = path.Trim();

            if (path == PATH_DELIMITER.ToString())
            {
                foundFolders.Add(startFolder);
                return foundFolders;
            }
                        
            // If the path isn't just / then trim any starting extraneous slashes
            path = path.TrimStart(new char[] { PATH_DELIMITER });
            
//            m_log.DebugFormat("[INVENTORY ARCHIVE UTILS]: Adjusted path in FindFolderByPath() is [{0}]", path);

            string[] components = SplitEscapedPath(path);
            components[0] = UnescapePath(components[0]);

            //string[] components = path.Split(new string[] { PATH_DELIMITER.ToString() }, 2, StringSplitOptions.None);
            
            InventoryCollection contents = inventoryService.GetFolderContent(startFolder.Owner, startFolder.ID);

//            m_log.DebugFormat(
//                "Found {0} folders in {1} for {2}", contents.Folders.Count, startFolder.Name, startFolder.Owner);

            foreach (InventoryFolderBase folder in contents.Folders)
            {
                if (folder.Name == components[0])
                {
                    if (components.Length > 1)
                        foundFolders.AddRange(FindFoldersByPath(inventoryService, folder, components[1]));
                    else
                        foundFolders.Add(folder);
                }
            }

            return foundFolders;
        }

        public static InventoryItemBase FindItemByPath(
            IInventoryService inventoryService, UUID userId, string path)
        {
            InventoryFolderBase rootFolder = inventoryService.GetRootFolder(userId);

            if (null == rootFolder)
                return null;

            return FindItemByPath(inventoryService, rootFolder, path);
        }

        public static InventoryItemBase FindItemByPath(
            IInventoryService inventoryService, InventoryFolderBase startFolder, string path)
        {
            List<InventoryItemBase> foundItems = FindItemsByPath(inventoryService, startFolder, path);

            if (foundItems.Count != 0)
                return foundItems[0];
            else
                return null;
        }

        public static List<InventoryItemBase> FindItemsByPath(
            IInventoryService inventoryService, UUID userId, string path)
        {
            InventoryFolderBase rootFolder = inventoryService.GetRootFolder(userId);

            if (null == rootFolder)
                return new List<InventoryItemBase>();

            return FindItemsByPath(inventoryService, rootFolder, path);
        }

        public static List<InventoryItemBase> FindItemsByPath(
            IInventoryService inventoryService, InventoryFolderBase startFolder, string path)
        {
            List<InventoryItemBase> foundItems = new List<InventoryItemBase>();

            // If the path isn't just / then trim any starting extraneous slashes
            path = path.TrimStart(new char[] { PATH_DELIMITER });
            
            string[] components = SplitEscapedPath(path);
            components[0] = UnescapePath(components[0]);
                            
            //string[] components = path.Split(new string[] { PATH_DELIMITER }, 2, StringSplitOptions.None);

            if (components.Length == 1)
            {
//                m_log.DebugFormat(
//                    "FOUND SINGLE COMPONENT [{0}].  Looking for this in [{1}] {2}",
//                    components[0], startFolder.Name, startFolder.ID);
                
                List<InventoryItemBase> items = inventoryService.GetFolderItems(startFolder.Owner, startFolder.ID);

//                m_log.DebugFormat("[INVENTORY ARCHIVE UTILS]: Found {0} items in FindItemByPath()", items.Count);
                
                foreach (InventoryItemBase item in items)
                {
//                    m_log.DebugFormat("[INVENTORY ARCHIVE UTILS]: Inspecting item {0} {1}", item.Name, item.ID);
                    
                    if (item.Name == components[0])
                        foundItems.Add(item);
                }
            }
            else
            {
//                m_log.DebugFormat("FOUND COMPONENTS [{0}] and [{1}]", components[0], components[1]);

                InventoryCollection contents = inventoryService.GetFolderContent(startFolder.Owner, startFolder.ID);
                
                foreach (InventoryFolderBase folder in contents.Folders)
                {
                    if (folder.Name == components[0])
                        foundItems.AddRange(FindItemsByPath(inventoryService, folder, components[1]));
                }
            }

            return foundItems;
        }

        public static string[] SplitEscapedPath(string path)
        {
//            m_log.DebugFormat("SPLITTING PATH {0}", path);
            
            bool singleEscapeChar = false;
            
            for (int i = 0; i < path.Length; i++)
            {
                if (path[i] == ESCAPE_CHARACTER && !singleEscapeChar)
                {
                    singleEscapeChar = true;
                }
                else
                {
                    if (PATH_DELIMITER == path[i] && !singleEscapeChar)
                        return new string[2] { path.Remove(i), path.Substring(i + 1) };
                    else
                        singleEscapeChar = false;
                }
            }

            // We didn't find a delimiter
            return new string[1] { path };
        }

        public static string UnescapePath(string path)
        {
//            m_log.DebugFormat("ESCAPING PATH {0}", path);
            
            StringBuilder sb = new StringBuilder();

            bool singleEscapeChar = false;
            for (int i = 0; i < path.Length; i++)
            {
                if (path[i] == ESCAPE_CHARACTER && !singleEscapeChar)
                    singleEscapeChar = true;
                else
                    singleEscapeChar = false;

                if (singleEscapeChar)
                {
                    if (PATH_DELIMITER == path[i])
                        sb.Append(PATH_DELIMITER);
                }
                else
                {
                    sb.Append(path[i]);
                }
            }

//            m_log.DebugFormat("ESCAPED PATH TO {0}", sb);
            
            return sb.ToString();
        }

        public static string EscapeArchivePath(string path)
        {
            // Only encode ampersands (for escaping anything) and / (since this is used as general dir separator).
            return path.Replace("&", "&amp;").Replace("/", "&#47;");
        }

        public static string UnescapeArchivePath(string path)
        {
            return path.Replace("&#47;", "/").Replace("&amp;", "&");
        }
    }
}