2 files changed, 155 insertions, 0 deletions

diff --git a/src/gamestate/GameState.cpp b/src/gamestate/GameState.cpp
index 7bcc2d5..aaeecb1 100644
--- a/src/gamestate/GameState.cpp
+++ b/src/gamestate/GameState.cpp
@@ -1 +1,128 @@
 #include "GameState.hpp"
+#include <nlohmann/json.hpp>
+#include "../packet/PacketParser.hpp"
+#include "../packet/PacketBuilder.hpp"
+
+GameState::GameState(NetworkClient *Net) : nc(Net) {
+    Packet *response = nc->GetPacket();
+    if (response->GetId() != 0x02) {
+        std::cout << response->GetId() << std::endl;
+        throw 127;
+    }
+    PacketParser::Parse(*response, Login);
+    g_PlayerUuid = response->GetField(0).GetString();
+    g_PlayerName = response->GetField(1).GetString();
+    delete response;
+    m_networkState = ConnectionState::Play;
+    LOG(INFO) << g_PlayerName << "'s UUID is " << g_PlayerUuid;
+}
+
+void GameState::Update() {
+    Packet &packet = *nc->GetPacket();
+    if (&packet == nullptr)
+        return;
+
+    nlohmann::json json;
+
+    PacketParser::Parse(packet, m_networkState);
+
+    switch (packet.GetId()) {
+        case 0x23:
+            g_PlayerEid = packet.GetField(0).GetInt();
+            g_Gamemode = (packet.GetField(1).GetUByte() & 0b11111011);
+            g_Dimension = packet.GetField(2).GetInt();
+            g_Difficulty = packet.GetField(3).GetUByte();
+            g_MaxPlayers = packet.GetField(4).GetUByte();
+            g_LevelType = packet.GetField(5).GetString();
+            g_ReducedDebugInfo = packet.GetField(6).GetBool();
+            LOG(INFO) << "Gamemode is " << g_Gamemode << ", Difficulty is " << (int) g_Difficulty
+                      << ", Level Type is " << g_LevelType;
+            break;
+        case 0x0D:
+            g_Difficulty = packet.GetField(0).GetUByte();
+            std::cout << "Difficulty now is " << (int) g_Difficulty << std::endl;
+            break;
+        case 0x43:
+            g_SpawnPosition = packet.GetField(0).GetPosition();
+            LOG(INFO) << "Spawn position is " << g_SpawnPosition.GetX() << "," << g_SpawnPosition.GetY() << ","
+                      << g_SpawnPosition.GetZ();
+            break;
+        case 0x2B:
+            g_PlayerInvulnerable = (packet.GetField(0).GetByte() & 0x01) != 0;
+            g_PlayerFlying = (packet.GetField(0).GetByte() & 0x02) != 0;
+            g_PlayerAllowFlying = (packet.GetField(0).GetByte() & 0x04) != 0;
+            g_PlayerCreativeMode = (packet.GetField(0).GetByte() & 0x08) != 0;
+            g_PlayerFlyingSpeed = packet.GetField(1).GetFloat();
+            g_PlayerFovModifier = packet.GetField(2).GetFloat();
+            LOG(INFO) << "FOV modifier is " << g_PlayerFovModifier;
+            break;
+        case 0x2E:
+            if ((packet.GetField(5).GetByte() & 0x10) != 0) {
+                g_PlayerPitch += packet.GetField(4).GetFloat();
+            } else {
+                g_PlayerPitch = packet.GetField(4).GetFloat();
+            };
+
+            if ((packet.GetField(5).GetByte() & 0x08) != 0) {
+                g_PlayerYaw += packet.GetField(3).GetFloat();
+            } else {
+                g_PlayerYaw = packet.GetField(3).GetFloat();
+            }
+
+            if ((packet.GetField(5).GetByte() & 0x01) != 0) {
+                g_PlayerX += packet.GetField(0).GetDouble();
+            } else {
+                g_PlayerX = packet.GetField(0).GetDouble();
+            }
+
+            if ((packet.GetField(5).GetByte() & 0x02) != 0) {
+                g_PlayerY += packet.GetField(1).GetDouble();
+            } else {
+                g_PlayerY = packet.GetField(1).GetDouble();
+            }
+
+            if ((packet.GetField(5).GetByte() & 0x04) != 0) {
+                g_PlayerZ += packet.GetField(2).GetDouble();
+            } else {
+                g_PlayerZ = packet.GetField(2).GetDouble();
+            }
+
+            g_IsGameStarted = true;
+            nc->AddPacketToQueue(PacketBuilder::CPlay0x03(0));
+            nc->AddPacketToQueue(PacketBuilder::CPlay0x00(packet.GetField(6).GetVarInt()));
+            LOG(INFO) << "Game is started!";
+            LOG(INFO) << "PlayerPos is " << g_PlayerX << ", " << g_PlayerY << ", " << g_PlayerZ << "\tAngle: "
+                      << g_PlayerYaw
+                      << "," << g_PlayerPitch;
+            break;
+        case 0x1A:
+            json = nlohmann::json::parse(packet.GetField(0).GetString());
+            std::cout << "Disconnect reason: " << json["text"].get<std::string>() << std::endl;
+            throw 119;
+            break;
+        case 0x20:
+            world.ParseChunkData(packet);
+            break;
+        case 0x07:
+            LOG(INFO) << "Statistics: ";
+            for (int i = 0; i < packet.GetField(0).GetVarInt(); i++) {
+                LOG(INFO) << "\t" << packet.GetField(1).GetArray()[0].GetString() << ": "
+                          << packet.GetField(1).GetArray()[1].GetVarInt();
+            }
+            break;
+        default:
+            break;
+    }
+    if (g_IsGameStarted) {
+        std::chrono::steady_clock clock;
+        static auto timeOfPreviousSendedPpalPacket(clock.now());
+        std::chrono::duration<double, std::milli> delta = clock.now() - timeOfPreviousSendedPpalPacket;
+        if (delta.count() >= 50) {
+            nc->AddPacketToQueue(
+                    PacketBuilder::CPlay0x0D(g_PlayerX, g_PlayerY, g_PlayerZ, g_PlayerYaw, g_PlayerPitch, true));
+            timeOfPreviousSendedPpalPacket = clock.now();
+        }
+    }
+
+    delete &packet;
+}
diff --git a/src/gamestate/GameState.hpp b/src/gamestate/GameState.hpp
index e9c433d..3d7dc80 100644
--- a/src/gamestate/GameState.hpp
+++ b/src/gamestate/GameState.hpp
@@ -1,8 +1,36 @@
 #pragma once
 
 #include "../world/World.hpp"
+#include "../network/NetworkClient.hpp"
 
 class GameState {
+    NetworkClient *nc;
 public:
+    GameState(NetworkClient *NetClient);
     World world;
+    void Update();
+
+    std::string g_PlayerUuid;
+    std::string g_PlayerName;
+    ConnectionState m_networkState;
+    bool g_IsGameStarted;
+    int g_PlayerEid;
+    int g_Gamemode;
+    int g_Dimension;
+    byte g_Difficulty;
+    byte g_MaxPlayers;
+    std::string g_LevelType;
+    bool g_ReducedDebugInfo;
+    Vector g_SpawnPosition;
+    bool g_PlayerInvulnerable;
+    bool g_PlayerFlying;
+    bool g_PlayerAllowFlying;
+    bool g_PlayerCreativeMode;
+    float g_PlayerFlyingSpeed;
+    float g_PlayerFovModifier;
+    float g_PlayerPitch;
+    float g_PlayerYaw;
+    double g_PlayerX;
+    double g_PlayerY;
+    double g_PlayerZ;
 };