Implement friends list

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

@@ -0,0 +1,35 @@
+package emu.nebula.server.handlers;
+
+import emu.nebula.net.NetHandler;
+import emu.nebula.net.NetMsgId;
+import emu.nebula.proto.FriendUidSearch.FriendUIdSearchReq;
+import emu.nebula.proto.FriendUidSearch.FriendUIdSearchResp;
+import emu.nebula.net.HandlerId;
+import emu.nebula.Nebula;
+import emu.nebula.net.GameSession;
+
+@HandlerId(NetMsgId.friend_uid_search_req)
+public class HandlerFriendUidSearchReq extends NetHandler {
+
+    @Override
+    public byte[] handle(GameSession session, byte[] message) throws Exception {
+        // Parse request
+        var req = FriendUIdSearchReq.parseFrom(message);
+        int uid = (int) req.getId();
+        
+        // Get target player
+        var target = Nebula.getGameContext().getPlayerModule().getPlayer(uid);
+        
+        if (target == null) {
+            return session.encodeMsg(NetMsgId.friend_uid_search_failed_ack);
+        }
+        
+        // Build response
+        var rsp = FriendUIdSearchResp.newInstance()
+                .setFriend(target.getFriendProto());
+        
+        // Encode and send
+        return session.encodeMsg(NetMsgId.friend_uid_search_succeed_ack, rsp);
+    }
+
+}