Added support for restoring from backups (snapshots). Added /listsnapshots, //use, and //restore.

src/com/sk89q/worldedit/snapshots/Snapshot.java

@@ -0,0 +1,73 @@
+// $Id$
+/*
+ * WorldEdit
+ * Copyright (C) 2010 sk89q <http://www.sk89q.com>
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program. If not, see <http://www.gnu.org/licenses/>.
+*/
+
+package com.sk89q.worldedit.snapshots;
+
+import com.sk89q.worldedit.data.*;
+import java.io.*;
+
+/**
+ *
+ * @author sk89q
+ */
+public class Snapshot {
+    /**
+     * Stores snapshot file.
+     */
+    private File file;
+    /**
+     * Name of the snapshot;
+     */
+    private String name;
+
+    /**
+     * Construct a snapshot restoration operation.
+     * 
+     * @param editSession
+     * @param dir
+     * @param snapshot
+     */
+    public Snapshot(SnapshotRepository repo, String snapshot) {
+        file = new File(repo.getDirectory(), snapshot);
+        name = snapshot;
+    }
+
+    /**
+     * Get a chunk store.
+     * 
+     * @return
+     * @throws IOException
+     */
+    public ChunkStore getChunkStore() throws IOException {
+        if (file.getName().toLowerCase().endsWith(".zip")) {
+            return new ZippedAlphaChunkStore(file);
+        } else {
+            return new AlphaChunkStore(file);
+        }
+    }
+
+    /**
+     * Get the snapshot's name.
+     * 
+     * @return
+     */
+    public String getName() {
+        return name;
+    }
+}