ArchiveScenesGroup.cs

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 * THIS SOFTWARE IS PROVIDED BY THE DEVELOPERS ``AS IS'' AND ANY
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using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using OpenSim.Region.Framework.Scenes;
using OpenMetaverse;
using System.Drawing;

namespace OpenSim.Region.CoreModules.World.Archiver
{
    public class ArchiveScenesGroup
    {
        public SortedDictionary<uint, SortedDictionary<uint, Scene>> Regions { get; set; }
        
        protected Dictionary<UUID, string> m_regionDirs;

        public Rectangle Rect { get; set; }


        public ArchiveScenesGroup()
        {
            Regions = new SortedDictionary<uint, SortedDictionary<uint, Scene>>();
            m_regionDirs = new Dictionary<UUID, string>();
            Rect = new Rectangle(0, 0, 0, 0);
        }

        public void AddScene(Scene scene)
        {
            uint x = scene.RegionInfo.RegionLocX;
            uint y = scene.RegionInfo.RegionLocY;

            SortedDictionary<uint, Scene> row;
            if (!Regions.TryGetValue(y, out row))
            {
                row = new SortedDictionary<uint, Scene>();
                Regions[y] = row;
            }

            row[x] = scene;
        }

        public void CalcSceneLocations()
        {
            if (Regions.Count == 0)
                return;

            // Find the bounding rectangle

            uint firstY = Regions.First().Key;
            uint lastY = Regions.Last().Key;

            uint? firstX = null;
            uint? lastX = null;

            foreach (SortedDictionary<uint, Scene> row in Regions.Values)
            {
                uint curFirstX = row.First().Key;
                uint curLastX = row.Last().Key;

                firstX = (firstX == null) ? curFirstX : (firstX < curFirstX) ? firstX : curFirstX;
                lastX = (lastX == null) ? curLastX : (lastX > curLastX) ? lastX : curLastX;
            }

            Rect = new Rectangle((int)firstX, (int)firstY, (int)(lastX - firstX + 1), (int)(lastY - firstY + 1));


            // Calculate the subdirectory in which each region will be stored in the archive

            m_regionDirs.Clear();
            ForEachScene(delegate(Scene scene)
            {
                // We add the region's coordinates to ensure uniqueness even if multiple regions have the same name
                string path = string.Format("{0}_{1}_{2}",
                    scene.RegionInfo.RegionLocX - Rect.X + 1,
                    scene.RegionInfo.RegionLocY - Rect.Y + 1,
                    scene.RegionInfo.RegionName.Replace(' ', '_'));
                m_regionDirs[scene.RegionInfo.RegionID] = path;
            });
        }

        public string GetRegionDir(UUID regionID)
        {
            return m_regionDirs[regionID];
        }

        public void ForEachScene(Action<Scene> action)
        {
            foreach (SortedDictionary<uint, Scene> row in Regions.Values)
            {
                foreach (Scene scene in row.Values)
                {
                    action(scene);
                }
            }
        }
        
        public bool TryGetScene(Point location, out Scene scene)
        {
            SortedDictionary<uint, Scene> row;
            if (Regions.TryGetValue((uint)location.Y, out row))
            {
                if (row.TryGetValue((uint)location.X, out scene))
                    return true;
            }

            scene = null;
            return false;
        }

    }
}