Implement gacha history

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

@@ -0,0 +1,34 @@
+package emu.nebula.server.handlers;
+
+import emu.nebula.net.NetHandler;
+import emu.nebula.net.NetMsgId;
+import emu.nebula.proto.GachaHistoriesOuterClass.GachaHistories;
+import emu.nebula.proto.Public.UI32;
+import emu.nebula.net.HandlerId;
+import emu.nebula.net.GameSession;
+
+@HandlerId(NetMsgId.gacha_histories_req)
+public class HandlerGachaHistoriesReq extends NetHandler {
+
+    @Override
+    public byte[] handle(GameSession session, byte[] message) throws Exception {
+        // Parse request
+        var req = UI32.parseFrom(message);
+        
+        // Get history log
+        var list = session.getPlayer().getGachaManager().getHistories().get(req.getValue());
+        
+        // Build response
+        var rsp = GachaHistories.newInstance();
+        
+        if (list != null) {
+            for (var log : list) {
+                rsp.addList(log.toProto());
+            }
+        }
+        
+        // Encode and send
+        return session.encodeMsg(NetMsgId.gacha_histories_succeed_ack, rsp);
+    }
+
+}