From 7b22b575b71e46d5feceeb7f5a12f2e6e1fc7cce Mon Sep 17 00:00:00 2001
From: Kinesis <CCasusensa@users.noreply.github.com>
Date: Sun, 1 May 2022 12:43:44 +0800
Subject: [PATCH] implement McoinExchange packet Handler

---
 proto/McoinExchangeHcoinReq.proto             |  8 ++++++
 proto/McoinExchangeHcoinRsp.proto             |  8 ++++++
 .../recv/HandlerMcoinExchangeHcoinReq.java    | 26 +++++++++++++++++++
 .../send/PacketMcoinExchangeHcoinRsp.java     | 18 +++++++++++++
 4 files changed, 60 insertions(+)
 create mode 100644 proto/McoinExchangeHcoinReq.proto
 create mode 100644 proto/McoinExchangeHcoinRsp.proto
 create mode 100644 src/main/java/emu/grasscutter/server/packet/recv/HandlerMcoinExchangeHcoinReq.java
 create mode 100644 src/main/java/emu/grasscutter/server/packet/send/PacketMcoinExchangeHcoinRsp.java

diff --git a/proto/McoinExchangeHcoinReq.proto b/proto/McoinExchangeHcoinReq.proto
new file mode 100644
index 000000000..5b6f37ee9
--- /dev/null
+++ b/proto/McoinExchangeHcoinReq.proto
@@ -0,0 +1,8 @@
+syntax = "proto3";
+
+option java_package = "emu.grasscutter.net.proto";
+
+message McoinExchangeHcoinReq {
+  uint32 mCoinNum = 1;
+  uint32 hCoinNum = 2;
+}
diff --git a/proto/McoinExchangeHcoinRsp.proto b/proto/McoinExchangeHcoinRsp.proto
new file mode 100644
index 000000000..b1904885b
--- /dev/null
+++ b/proto/McoinExchangeHcoinRsp.proto
@@ -0,0 +1,8 @@
+syntax = "proto3";
+
+option java_package = "emu.grasscutter.net.proto";
+
+message McoinExchangeHcoinRsp {
+  uint32 mCoinNum = 1;
+  uint32 hCoinNum = 2;
+}
diff --git a/src/main/java/emu/grasscutter/server/packet/recv/HandlerMcoinExchangeHcoinReq.java b/src/main/java/emu/grasscutter/server/packet/recv/HandlerMcoinExchangeHcoinReq.java
new file mode 100644
index 000000000..0f3d2e7f8
--- /dev/null
+++ b/src/main/java/emu/grasscutter/server/packet/recv/HandlerMcoinExchangeHcoinReq.java
@@ -0,0 +1,26 @@
+package emu.grasscutter.server.packet.recv;
+
+import emu.grasscutter.net.packet.Opcodes;
+import emu.grasscutter.net.packet.PacketHandler;
+import emu.grasscutter.net.packet.PacketOpcodes;
+import emu.grasscutter.net.proto.McoinExchangeHcoinReqOuterClass;
+import emu.grasscutter.server.game.GameSession;
+import emu.grasscutter.server.packet.send.PacketMcoinExchangeHcoinRsp;
+
+@Opcodes(PacketOpcodes.McoinExchangeHcoinReq)
+public class HandlerMcoinExchangeHcoinReq extends PacketHandler {
+
+    @Override
+    public void handle(GameSession session, byte[] header, byte[] payload) throws Exception {
+        McoinExchangeHcoinReqOuterClass.McoinExchangeHcoinReq exchangeReq = McoinExchangeHcoinReqOuterClass.McoinExchangeHcoinReq.parseFrom(payload);
+        if (session == null) {
+            return;
+        } else if (session.getPlayer().getCrystals() < exchangeReq.getMCoinNum()) {
+            return;
+        }
+        session.getPlayer().setCrystals(session.getPlayer().getCrystals() - exchangeReq.getMCoinNum());
+        session.getPlayer().setPrimogems(session.getPlayer().getPrimogems() + exchangeReq.getHCoinNum());
+        session.getPlayer().save();
+        session.send(new PacketMcoinExchangeHcoinRsp(session.getPlayer().getCrystals(), session.getPlayer().getPrimogems()));
+    }
+}
diff --git a/src/main/java/emu/grasscutter/server/packet/send/PacketMcoinExchangeHcoinRsp.java b/src/main/java/emu/grasscutter/server/packet/send/PacketMcoinExchangeHcoinRsp.java
new file mode 100644
index 000000000..65bef7b27
--- /dev/null
+++ b/src/main/java/emu/grasscutter/server/packet/send/PacketMcoinExchangeHcoinRsp.java
@@ -0,0 +1,18 @@
+package emu.grasscutter.server.packet.send;
+
+import emu.grasscutter.net.packet.BasePacket;
+import emu.grasscutter.net.packet.PacketOpcodes;
+import emu.grasscutter.net.proto.McoinExchangeHcoinRspOuterClass;
+
+public class PacketMcoinExchangeHcoinRsp extends BasePacket {
+
+    public PacketMcoinExchangeHcoinRsp(int mcoin, int hcoin) {
+        super(PacketOpcodes.McoinExchangeHcoinRsp);
+
+        McoinExchangeHcoinRspOuterClass.McoinExchangeHcoinRsp mcoinExchangeHcoinRsp = McoinExchangeHcoinRspOuterClass.McoinExchangeHcoinRsp.newBuilder()
+                .setMCoinNum(mcoin)
+                .setHCoinNum(hcoin).build();
+
+        this.setData(mcoinExchangeHcoinRsp);
+    }
+}