Added backup system; resolves #103

src/main/java/io/github/dre2n/dungeonsxl/command/SaveCommand.java

@@ -20,6 +20,7 @@
 import io.github.dre2n.commons.util.messageutil.MessageUtil;
 import io.github.dre2n.dungeonsxl.DungeonsXL;
 import io.github.dre2n.dungeonsxl.config.DMessages;
+import io.github.dre2n.dungeonsxl.config.MainConfig.BackupMode;
 import io.github.dre2n.dungeonsxl.player.DPermissions;
 import io.github.dre2n.dungeonsxl.world.DEditWorld;
 import org.bukkit.command.CommandSender;
@@ -46,6 +47,11 @@ public void onExecute(String[] args, CommandSender sender) {
         Player player = (Player) sender;
         DEditWorld editWorld = DEditWorld.getByWorld(player.getWorld());
         if (editWorld != null) {
+            BackupMode backupMode = plugin.getMainConfig().getBackupMode();
+            if (backupMode == BackupMode.ON_SAVE || backupMode == BackupMode.ON_DISABLE_AND_SAVE) {
+                editWorld.getResource().backup(false);
+            }
+
             editWorld.save();
             MessageUtil.sendMessage(player, DMessages.CMD_SAVE_SUCCESS.getMessage());
 

src/main/java/io/github/dre2n/dungeonsxl/config/MainConfig.java

@@ -17,6 +17,7 @@
 package io.github.dre2n.dungeonsxl.config;
 
 import io.github.dre2n.commons.config.BRConfig;
+import io.github.dre2n.commons.util.EnumUtil;
 import java.io.File;
 import java.util.ArrayList;
 import java.util.Arrays;
@@ -30,7 +31,14 @@
  */
 public class MainConfig extends BRConfig {
 
-    public static final int CONFIG_VERSION = 9;
+    public enum BackupMode {
+        ON_DISABLE,
+        ON_DISABLE_AND_SAVE,
+        ON_SAVE,
+        NEVER
+    }
+
+    public static final int CONFIG_VERSION = 10;
 
     private String language = "english";
     private boolean enableEconomy = false;
@@ -65,6 +73,7 @@ public class MainConfig extends BRConfig {
     private boolean openInventories = false;
     private boolean dropItems = false;
     private List<String> editCommandWhitelist = new ArrayList<>();
+    private BackupMode backupMode = BackupMode.ON_DISABLE_AND_SAVE;
 
     /* Permissions bridge */
     private List<String> editPermissions = new ArrayList<>();
@@ -305,6 +314,21 @@ public List<String> getEditCommandWhitelist() {
         return editCommandWhitelist;
     }
 
+    /**
+     * @return the backup mode
+     */
+    public BackupMode getBackupMode() {
+        return backupMode;
+    }
+
+    /**
+     * @param mode
+     * the BackupMode to set
+     */
+    public void setBackupMode(BackupMode mode) {
+        backupMode = mode;
+    }
+
     /**
      * @return the edit mode permissions
      */
@@ -386,6 +410,10 @@ public void initialize() {
             config.set("secureMode.editCommandWhitelist", editCommandWhitelist);
         }
 
+        if (!config.contains("backupMode")) {
+            config.set("backupMode", backupMode.toString());
+        }
+
         if (!config.contains("editPermissions")) {
             config.set("editPermissions", editPermissions);
         }
@@ -465,6 +493,13 @@ public void load() {
             editCommandWhitelist = config.getStringList("secureMode.editCommandWhitelist");
         }
 
+        if (config.contains("backupMode")) {
+            String mode = config.getString("backupMode");
+            if (EnumUtil.isValidEnum(BackupMode.class, mode)) {
+                backupMode = BackupMode.valueOf(mode);
+            }
+        }
+
         if (config.contains("editPermissions")) {
             editPermissions = config.getStringList("editPermissions");
         }

src/main/java/io/github/dre2n/dungeonsxl/task/BackupResourceTask.java

@@ -0,0 +1,42 @@
+/*
+ * Copyright (C) 2012-2016 Frank Baumann
+ *
+ * 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 io.github.dre2n.dungeonsxl.task;
+
+import io.github.dre2n.commons.util.FileUtil;
+import io.github.dre2n.dungeonsxl.DungeonsXL;
+import io.github.dre2n.dungeonsxl.world.DResourceWorld;
+import java.io.File;
+import org.bukkit.scheduler.BukkitRunnable;
+
+/**
+ * @author Daniel Saukel
+ */
+public class BackupResourceTask extends BukkitRunnable {
+
+    private DResourceWorld resource;
+
+    public BackupResourceTask(DResourceWorld resource) {
+        this.resource = resource;
+    }
+
+    @Override
+    public void run() {
+        File target = new File(DungeonsXL.BACKUPS, resource.getName() + "-" + System.currentTimeMillis());
+        FileUtil.copyDirectory(resource.getFolder(), target, new String[]{});
+    }
+
+}

src/main/java/io/github/dre2n/dungeonsxl/world/DResourceWorld.java

@@ -21,13 +21,15 @@
 import io.github.dre2n.dungeonsxl.config.SignData;
 import io.github.dre2n.dungeonsxl.config.WorldConfig;
 import io.github.dre2n.dungeonsxl.player.DEditPlayer;
+import io.github.dre2n.dungeonsxl.task.BackupResourceTask;
 import java.io.File;
 import java.io.IOException;
 import org.bukkit.Bukkit;
 import org.bukkit.OfflinePlayer;
 import org.bukkit.World;
 import org.bukkit.WorldCreator;
 import org.bukkit.WorldType;
+import org.bukkit.scheduler.BukkitRunnable;
 
 /**
  * This class represents unloaded worlds.
@@ -165,6 +167,21 @@ public boolean isInvitedPlayer(OfflinePlayer player) {
     }
 
     /* Actions */
+    /**
+     * Creates a backup of the resource
+     *
+     * @param async
+     * whether the task shall be performed asyncronously
+     */
+    public void backup(boolean async) {
+        BackupResourceTask task = new BackupResourceTask(this);
+        if (async) {
+            task.runTaskAsynchronously(plugin);
+        } else {
+            task.run();
+        }
+    }
+
     /**
      * @param game
      * whether the instance is a DGameWorld

src/main/java/io/github/dre2n/dungeonsxl/world/DWorlds.java

@@ -19,6 +19,7 @@
 import io.github.dre2n.commons.util.FileUtil;
 import io.github.dre2n.commons.util.NumberUtil;
 import io.github.dre2n.dungeonsxl.DungeonsXL;
+import io.github.dre2n.dungeonsxl.config.MainConfig.BackupMode;
 import java.io.File;
 import java.util.HashSet;
 import java.util.Set;
@@ -29,6 +30,8 @@
  */
 public class DWorlds {
 
+    DungeonsXL plugin = DungeonsXL.getInstance();
+
     private Set<DResourceWorld> resources = new HashSet<>();
     private Set<DInstanceWorld> instances = new HashSet<>();
 
@@ -200,8 +203,13 @@ public void check() {
      * Clean up all instances.
      */
     public void deleteAllInstances() {
+        BackupMode backupMode = plugin.getMainConfig().getBackupMode();
         HashSet<DInstanceWorld> instances = new HashSet<>(this.instances);
         for (DInstanceWorld instance : instances) {
+            if (backupMode == BackupMode.ON_DISABLE | backupMode == BackupMode.ON_DISABLE_AND_SAVE && instance instanceof DEditWorld) {
+                instance.getResource().backup(false);
+            }
+
             instance.delete();
         }
     }