Handle reborns(rebirths) - set/get from db, flag to enable/disable and 1 basic NPC to handle it (#413)

* Added ability to handle reborn, option to enable/disable in ServerConstant

* Basic rebirth NPC for wolf spirit Ryko chan - id 9010021

* Added player message when rebirth system is off

* Removed some forgotten comments

* Ryko now displays original message if rebirth is not enabled

src/client/MapleCharacter.java

@@ -107,6 +107,7 @@ import tools.FilePrinter;
 import tools.MaplePacketCreator;
 import tools.Pair;
 import tools.Randomizer;
+import tools.exceptions.NotEnabledException;
 import tools.packets.Wedding;
 import client.autoban.AutobanManager;
 import client.creator.CharacterFactoryRecipe;
@@ -9882,4 +9883,66 @@ public class MapleCharacter extends AbstractMapleCharacterObject {
             try { con.close(); } catch (Exception e) { /* ignored */ }
         }
     }
+
+    public void setReborns(int value) {
+        if (!ServerConstants.USE_REBIRTH_SYSTEM) {
+            yellowMessage("Rebirth system is not enabled!");
+            throw new NotEnabledException();
+        }
+        Connection con = null;
+        PreparedStatement ps = null;
+        try {
+            con = DatabaseConnection.getConnection();
+            ps = con.prepareStatement("UPDATE characters SET reborns=? WHERE id=?;");
+            ps.setInt(1, value);
+            ps.setInt(2, id);
+            ps.executeUpdate();
+        } catch (SQLException e) {
+            e.printStackTrace();
+        } finally {
+            try { ps.close(); } catch (Exception e) { /* ignored */ }
+            try { con.close(); } catch (Exception e) { /* ignored */ }
+        }
+    }
+
+    public void addReborns() {
+        setReborns(getReborns() + 1);
+    }
+
+    public int getReborns() {
+        if (!ServerConstants.USE_REBIRTH_SYSTEM) {
+            yellowMessage("Rebirth system is not enabled!");
+            throw new NotEnabledException();
+        }
+        Connection con = null;
+        PreparedStatement ps = null;
+        try {
+            con = DatabaseConnection.getConnection();
+            ps = con.prepareStatement("SELECT reborns FROM characters WHERE id=?;");
+            ps.setInt(1, id);
+            ResultSet resultSet = ps.executeQuery();
+            resultSet.next();
+            return resultSet.getInt(1);
+        } catch (SQLException e) {
+            e.printStackTrace();
+        } finally {
+            try { ps.close(); } catch (Exception e) { /* ignored */ }
+            try { con.close(); } catch (Exception e) { /* ignored */ }
+        }
+        throw new RuntimeException();
+    }
+
+    public void executeReborn() {
+        if (!ServerConstants.USE_REBIRTH_SYSTEM) {
+            yellowMessage("Rebirth system is not enabled!");
+            throw new NotEnabledException();
+        }
+        if (getLevel() != 200) {
+            return;
+        }
+        addReborns();
+        changeJob(MapleJob.BEGINNER);
+        setLevel(0);
+        levelUp(true);
+    }
 }

src/constants/ServerConstants.java

@@ -104,6 +104,7 @@ public class ServerConstants {
     public static final boolean USE_BANISHABLE_TOWN_SCROLL = true;  //Enables town scrolls to act as if it's a "player banish", rendering the antibanish scroll effect available.
     public static final boolean USE_ENABLE_FULL_RESPAWN = true;     //At respawn task, always respawn missing mobs when they're available. Spawn count doesn't depend on how many players are currently there.
     public static final boolean USE_ENABLE_CHAT_LOG = true;         //Write in-game chat to log
+    public static final boolean USE_REBIRTH_SYSTEM = false;       //Flag to enable/disable rebirth system
     
     //Events/PQs Configuration
     public static final boolean USE_OLD_GMS_STYLED_PQ_NPCS = true;  //Enables PQ NPCs with similar behaviour to old GMS style, that skips info about the PQs and immediately tries to register the party in.

src/tools/exceptions/NotEnabledException.java

@@ -0,0 +1,12 @@
+package tools.exceptions;
+
+public class NotEnabledException extends RuntimeException {
+
+    public NotEnabledException() {
+        super("Feature not enabled, please enable the feature in ServerConstant");
+    }
+
+    public NotEnabledException(String message) {
+        super(message);
+    }
+}