Add NoteService to handle note operations

NoteService should be the only class with access to NoteDao;
nowhere else should NoteDao be accessed directly.

Channel dependencies are static in PacketProcessor, for now.
Ideally they would be injected in the constructor,
but since the constructor is private and I don't want to open
up that can of worms, I'll leave it like this.
At the very least, now we have a way of injecting services into
the handlers. This will make further restructuring way easier.

src/main/java/net/server/channel/handlers/UseCashItemHandler.java

@@ -36,9 +36,6 @@ import constants.game.GameConstants;
 import constants.id.ItemId;
 import constants.id.MapId;
 import constants.inventory.ItemConstants;
-import database.DaoException;
-import database.NoteDao;
-import model.Note;
 import net.AbstractPacketHandler;
 import net.packet.InPacket;
 import net.server.Server;
@@ -49,10 +46,10 @@ import server.Shop;
 import server.ShopFactory;
 import server.TimerManager;
 import server.maps.*;
+import service.NoteService;
 import tools.PacketCreator;
 import tools.Pair;
 
-import java.sql.SQLException;
 import java.util.ArrayList;
 import java.util.LinkedList;
 import java.util.List;
@@ -63,6 +60,12 @@ import static java.util.concurrent.TimeUnit.SECONDS;
 public final class UseCashItemHandler extends AbstractPacketHandler {
     private static final Logger log = LoggerFactory.getLogger(UseCashItemHandler.class);
 
+    private final NoteService noteService;
+
+    public UseCashItemHandler(NoteService noteService) {
+        this.noteService = noteService;
+    }
+
     @Override
     public void handlePacket(InPacket p, Client c) {
         final Character player = c.getPlayer();
@@ -361,13 +364,10 @@ public final class UseCashItemHandler extends AbstractPacketHandler {
         } else if (itemType == 509) {
             String sendTo = p.readString();
             String msg = p.readString();
-            Note note = Note.createNormal(msg, player.getName(), sendTo, Server.getInstance().getCurrentTime());
-            try {
-                NoteDao.save(note);
-            } catch (DaoException e) {
-                log.error("Failed to save note {}", note, e);
+            boolean sendSuccess = noteService.sendNormal(msg, player.getName(), sendTo);
+            if (sendSuccess) {
+                remove(c, position, itemId);
             }
-            remove(c, position, itemId);
         } else if (itemType == 510) {
             player.getMap().broadcastMessage(PacketCreator.musicChange("Jukebox/Congratulation"));
             remove(c, position, itemId);