Added new ExperienceFormula config and /mcconvert command

src/main/java/com/gmail/nossr50/commands/database/McconvertCommand.java

@@ -0,0 +1,69 @@
+package com.gmail.nossr50.commands.database;
+
+import java.util.List;
+
+import org.bukkit.command.Command;
+import org.bukkit.command.CommandSender;
+import org.bukkit.command.TabExecutor;
+import org.bukkit.entity.Player;
+
+import com.gmail.nossr50.locale.LocaleLoader;
+import com.gmail.nossr50.datatypes.experience.FormulaType;
+import com.gmail.nossr50.mcMMO;
+import com.gmail.nossr50.runnables.database.FormulaConversionTask;
+import com.gmail.nossr50.util.player.UserManager;
+import com.google.common.collect.ImmutableList;
+
+public class McconvertCommand implements TabExecutor {
+
+    /*
+    * Do this later; Use mcconvert instead of mmoupdate:
+    * OLD :
+    * /mmoupdate flatfile / mysql
+    *
+    * NEW :
+    * /mcconvert <database> <flatfile / sql>
+    * /mcconvert <experience> <linear / exponential>
+    * */
+    @Override
+    public boolean onCommand(CommandSender sender, Command command, String label, String[] args) {
+        switch (args.length) {
+            case 0:
+                sender.sendMessage("Usage is /mcconvert <linear | exponential>");
+                return true;
+
+            case 1:
+                FormulaType previousType = mcMMO.getFormulaManager().getPreviousFormulaType();
+                FormulaType newType = FormulaType.getFormulaType(args[0].toUpperCase());
+
+                if (newType == FormulaType.UNKNOWN) {
+                    sender.sendMessage("Unknown formula type! Valid types are: LINEAR and EXPONENTIAL");
+                    return true;
+                }
+
+                if (previousType == newType) {
+                    sender.sendMessage(LocaleLoader.getString("Commands.mcconvert.Same", newType));
+                    return true;
+                }
+
+                sender.sendMessage(LocaleLoader.getString("Commands.mcconvert.Start", previousType.toString(), newType.toString()));
+                UserManager.saveAll();
+                UserManager.clearAll();
+                new FormulaConversionTask(sender, newType).runTaskLater(mcMMO.p, 1);
+
+                for (Player player : mcMMO.p.getServer().getOnlinePlayers()) {
+                    UserManager.addUser(player);
+                }
+                return true;
+
+            default:
+                break;
+        }
+        return false;
+    }
+
+    @Override
+    public List<String> onTabComplete(CommandSender sender, Command command, String alias, String[] args) {
+        return ImmutableList.of();
+    }
+}