Implement setting player skin

src/main/java/emu/nebula/game/player/Player.java

@@ -284,6 +284,27 @@ public class Player implements GameDatabaseObject {
         // Success
         return true;
     }
+    
+    public boolean setSkin(int skinId) {
+        // Skip if we are setting the same skin
+        if (this.skinId == skinId) {
+            return true;
+        }
+        
+        // Make sure we own this skin
+        if (!getInventory().hasSkin(skinId)) {
+            return false;
+        }
+        
+        // Set skin
+        this.skinId = skinId;
+        
+        // Update in database
+        Nebula.getGameDatabase().update(this, this.getUid(), "skinId", this.getSkinId());
+        
+        // Success
+        return false;
+    }
 
     public boolean setShowChars(RepeatedInt charIds) {
         // Sanity check

src/main/java/emu/nebula/server/handlers/HandlerPlayerSkinShowReq.java

@@ -0,0 +1,28 @@
+package emu.nebula.server.handlers;
+
+import emu.nebula.net.NetHandler;
+import emu.nebula.net.NetMsgId;
+import emu.nebula.proto.PlayerSkinShow.PlayerSkinShowReq;
+import emu.nebula.net.HandlerId;
+import emu.nebula.net.GameSession;
+
+@HandlerId(NetMsgId.player_skin_show_req)
+public class HandlerPlayerSkinShowReq extends NetHandler {
+
+    @Override
+    public byte[] handle(GameSession session, byte[] message) throws Exception {
+        // Parse req
+        var req = PlayerSkinShowReq.parseFrom(message);
+        
+        // Set player skin
+        boolean success = session.getPlayer().setSkin(req.getSkinId());
+        
+        if (success == false) {
+            session.encodeMsg(NetMsgId.player_skin_show_failed_ack);
+        }
+        
+        // Encode and send
+        return session.encodeMsg(NetMsgId.player_skin_show_succeed_ack);
+    }
+
+}