Rewrite Mo NPC script to be GMS-like

src/main/java/scripting/AbstractPlayerInteraction.java

@@ -36,6 +36,8 @@ import net.server.Server;
 import net.server.guild.Guild;
 import net.server.world.Party;
 import net.server.world.PartyCharacter;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
 import scripting.event.EventInstanceManager;
 import scripting.event.EventManager;
 import scripting.npc.NPCScriptManager;
@@ -61,6 +63,7 @@ import java.util.*;
 import static java.util.concurrent.TimeUnit.DAYS;
 
 public class AbstractPlayerInteraction {
+    private static final Logger log = LoggerFactory.getLogger(AbstractPlayerInteraction.class);
 
     public Client c;
 
@@ -68,6 +71,10 @@ public class AbstractPlayerInteraction {
         this.c = c;
     }
 
+    public void log(String message) {
+        log.info(message);
+    }
+
     public Client getClient() {
         return c;
     }
@@ -1207,4 +1214,4 @@ public class AbstractPlayerInteraction {
     private void sendBlueNotice(MapleMap map, String message) {
         map.dropMessage(6, message);
     }
-}
+}

src/main/java/scripting/npc/NPCConversationManager.java

@@ -272,10 +272,23 @@ public class NPCConversationManager extends AbstractPlayerInteraction {
         return getPlayer().getMeso();
     }
 
+    // TODO: refactor scripts to use this instead of "getMeso() < amount"
+    public boolean hasMeso(int amount) {
+        return getMeso() >= amount;
+    }
+
     public void gainMeso(int gain) {
         getPlayer().gainMeso(gain);
     }
 
+    // TODO: refactor scripts to use this instead of "gainMeso(-amount)"
+    public void loseMeso(int loss) {
+        if (loss < 0) {
+            throw new IllegalArgumentException("Can only lose positive amount of mesos");
+        }
+        gainMeso(-loss);
+    }
+
     public void gainExp(int gain) {
         getPlayer().gainExp(gain, true, true);
     }