Implement sending friends energy

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

@@ -0,0 +1,34 @@
+package emu.nebula.server.handlers;
+
+import emu.nebula.net.NetHandler;
+import emu.nebula.net.NetMsgId;
+import emu.nebula.proto.FriendReceiveEnergy.FriendReceiveEnergyReq;
+import emu.nebula.proto.FriendReceiveEnergy.FriendReceiveEnergyResp;
+import emu.nebula.net.HandlerId;
+import emu.nebula.net.GameSession;
+
+@HandlerId(NetMsgId.friend_receive_energy_req)
+public class HandlerFriendReceiveEnergyReq extends NetHandler {
+
+    @Override
+    public byte[] handle(GameSession session, byte[] message) throws Exception {
+        // Parse request
+        var req = FriendReceiveEnergyReq.parseFrom(message);
+        
+        // Send energy
+        var result = session.getPlayer().getFriendList().recvEnergy(req.getUIds());
+        
+        // Build response
+        var rsp = FriendReceiveEnergyResp.newInstance()
+                .setChange(result.getChange().toProto())
+                .setReceiveEnergyCnt(result.getEnergy());
+        
+        for (long uid : result.getUids()) {
+            rsp.addUIds(uid);
+        }
+        
+        // Encode and send
+        return session.encodeMsg(NetMsgId.friend_receive_energy_succeed_ack, rsp);
+    }
+
+}