Add whatever I was working on for the last month

1 files changed, 490 insertions, 0 deletions

diff --git a/game/shared/protocol.cc b/game/shared/protocol.cc
new file mode 100644
index 0000000..e2c79b5
--- /dev/null
+++ b/game/shared/protocol.cc
@@ -0,0 +1,490 @@
+#include "shared/pch.hh"
+#include "shared/protocol.hh"
+
+#include "core/buffer.hh"
+#include "core/floathacks.hh"
+
+#include "shared/chunk.hh"
+#include "shared/dimension.hh"
+#include "shared/globals.hh"
+#include "shared/head.hh"
+#include "shared/player.hh"
+#include "shared/transform.hh"
+#include "shared/velocity.hh"
+
+static ReadBuffer read_buffer;
+static WriteBuffer write_buffer;
+
+ENetPacket *protocol::encode(const protocol::StatusRequest &packet, enet_uint32 flags)
+{
+    write_buffer.reset();
+    write_buffer.write_UI16(protocol::StatusRequest::ID);
+    write_buffer.write_UI32(packet.version);
+    return write_buffer.to_packet(flags);
+}
+
+ENetPacket *protocol::encode(const protocol::StatusResponse &packet, enet_uint32 flags)
+{
+    write_buffer.reset();
+    write_buffer.write_UI16(protocol::StatusResponse::ID);
+    write_buffer.write_UI32(packet.version);
+    write_buffer.write_UI16(packet.max_players);
+    write_buffer.write_UI16(packet.num_players);
+    write_buffer.write_string(packet.motd);
+    return write_buffer.to_packet(flags);
+}
+
+ENetPacket *protocol::encode(const protocol::LoginRequest &packet, enet_uint32 flags)
+{
+    write_buffer.reset();
+    write_buffer.write_UI16(protocol::LoginRequest::ID);
+    write_buffer.write_UI32(packet.version);
+    write_buffer.write_UI64(packet.voxel_def_checksum);
+    write_buffer.write_UI64(packet.item_def_checksum);
+    write_buffer.write_UI64(packet.password_hash);
+    write_buffer.write_string(packet.username.substr(0, protocol::MAX_USERNAME));
+    return write_buffer.to_packet(flags);
+}
+
+ENetPacket *protocol::encode(const protocol::LoginResponse &packet, enet_uint32 flags)
+{
+    write_buffer.reset();
+    write_buffer.write_UI16(protocol::LoginResponse::ID);
+    write_buffer.write_UI16(packet.client_index);
+    write_buffer.write_UI64(packet.client_identity);
+    write_buffer.write_UI16(packet.server_tickrate);
+    return write_buffer.to_packet(flags);
+}
+
+ENetPacket *protocol::encode(const protocol::Disconnect &packet, enet_uint32 flags)
+{
+    write_buffer.reset();
+    write_buffer.write_UI16(protocol::Disconnect::ID);
+    write_buffer.write_string(packet.reason);
+    return write_buffer.to_packet(flags);
+}
+
+ENetPacket *protocol::encode(const protocol::ChunkVoxels &packet, enet_uint32 flags)
+{
+    write_buffer.reset();
+    write_buffer.write_UI16(protocol::ChunkVoxels::ID);
+    write_buffer.write_I32(packet.chunk.x);
+    write_buffer.write_I32(packet.chunk.y);
+    write_buffer.write_I32(packet.chunk.z);
+    packet.voxels.serialize(write_buffer);
+    return write_buffer.to_packet(flags);
+}
+
+ENetPacket *protocol::encode(const protocol::EntityTransform &packet, enet_uint32 flags)
+{
+    write_buffer.reset();
+    write_buffer.write_UI16(protocol::EntityTransform::ID);
+    write_buffer.write_UI64(static_cast<std::uint64_t>(packet.entity));
+    write_buffer.write_I32(packet.chunk.x);
+    write_buffer.write_I32(packet.chunk.y);
+    write_buffer.write_I32(packet.chunk.z);
+    write_buffer.write_FP32(packet.local.x);
+    write_buffer.write_FP32(packet.local.y);
+    write_buffer.write_FP32(packet.local.z);
+    write_buffer.write_FP32(packet.angles.x);
+    write_buffer.write_FP32(packet.angles.y);
+    write_buffer.write_FP32(packet.angles.z);
+    return write_buffer.to_packet(flags);
+}
+
+ENetPacket *protocol::encode(const protocol::EntityHead &packet, enet_uint32 flags)
+{
+    write_buffer.reset();
+    write_buffer.write_UI16(protocol::EntityHead::ID);
+    write_buffer.write_UI64(static_cast<std::uint64_t>(packet.entity));
+    write_buffer.write_FP32(packet.angles.x);
+    write_buffer.write_FP32(packet.angles.y);
+    write_buffer.write_FP32(packet.angles.z);
+    return write_buffer.to_packet(flags);
+}
+
+ENetPacket *protocol::encode(const protocol::EntityVelocity &packet, enet_uint32 flags)
+{
+    write_buffer.reset();
+    write_buffer.write_UI16(protocol::EntityVelocity::ID);
+    write_buffer.write_UI64(static_cast<std::uint64_t>(packet.entity));
+    write_buffer.write_FP32(packet.value.x);
+    write_buffer.write_FP32(packet.value.y);
+    write_buffer.write_FP32(packet.value.z);
+    return write_buffer.to_packet(flags);
+}
+
+ENetPacket *protocol::encode(const protocol::SpawnPlayer &packet, enet_uint32 flags)
+{
+    write_buffer.reset();
+    write_buffer.write_UI16(protocol::SpawnPlayer::ID);
+    write_buffer.write_UI64(static_cast<std::uint64_t>(packet.entity));  
+    return write_buffer.to_packet(flags);
+}
+
+ENetPacket *protocol::encode(const protocol::ChatMessage &packet, enet_uint32 flags)
+{
+    write_buffer.reset();
+    write_buffer.write_UI16(protocol::ChatMessage::ID);
+    write_buffer.write_UI16(packet.type);
+    write_buffer.write_string(packet.sender.substr(0, protocol::MAX_USERNAME));
+    write_buffer.write_string(packet.message.substr(0, protocol::MAX_CHAT));
+    return write_buffer.to_packet(flags);
+}
+
+ENetPacket *protocol::encode(const protocol::SetVoxel &packet, enet_uint32 flags)
+{
+    write_buffer.reset();
+    write_buffer.write_UI16(protocol::SetVoxel::ID);
+    write_buffer.write_I64(packet.vpos.x);
+    write_buffer.write_I64(packet.vpos.y);
+    write_buffer.write_I64(packet.vpos.z);
+    write_buffer.write_UI16(packet.voxel);
+    write_buffer.write_UI16(packet.flags);
+    return write_buffer.to_packet(flags);
+}
+
+ENetPacket *protocol::encode(const protocol::RemoveEntity &packet, enet_uint32 flags)
+{
+    write_buffer.reset();
+    write_buffer.write_UI16(protocol::RemoveEntity::ID);
+    write_buffer.write_UI64(static_cast<std::uint64_t>(packet.entity));
+    return write_buffer.to_packet(flags);
+}
+
+ENetPacket *protocol::encode(const protocol::EntityPlayer &packet, enet_uint32 flags)
+{
+    write_buffer.reset();
+    write_buffer.write_UI16(protocol::EntityPlayer::ID);
+    write_buffer.write_UI64(static_cast<std::uint64_t>(packet.entity));
+    return write_buffer.to_packet(flags);
+}
+
+ENetPacket *protocol::encode(const protocol::ScoreboardUpdate &packet, enet_uint32 flags)
+{
+    write_buffer.reset();
+    write_buffer.write_UI16(protocol::ScoreboardUpdate::ID);
+    write_buffer.write_UI16(static_cast<std::uint16_t>(packet.names.size()));
+    for(const std::string &username : packet.names)
+        write_buffer.write_string(username.substr(0, protocol::MAX_USERNAME));
+    return write_buffer.to_packet(flags);
+}
+
+ENetPacket *protocol::encode(const protocol::RequestChunk &packet, enet_uint32 flags)
+{
+    write_buffer.reset();
+    write_buffer.write_UI16(protocol::RequestChunk::ID);
+    write_buffer.write_I32(packet.cpos.x);
+    write_buffer.write_I32(packet.cpos.y);
+    write_buffer.write_I32(packet.cpos.z);
+    return write_buffer.to_packet(flags);
+}
+
+ENetPacket *protocol::encode(const protocol::GenericSound &packet, enet_uint32 flags)
+{
+    write_buffer.reset();
+    write_buffer.write_UI16(protocol::GenericSound::ID);
+    write_buffer.write_string(packet.sound.substr(0, protocol::MAX_SOUNDNAME));
+    write_buffer.write_UI8(packet.looping);
+    write_buffer.write_FP32(packet.pitch);
+    return write_buffer.to_packet(flags);
+}
+
+ENetPacket *protocol::encode(const protocol::EntitySound &packet, enet_uint32 flags)
+{
+    write_buffer.reset();
+    write_buffer.write_UI16(protocol::EntitySound::ID);
+    write_buffer.write_UI64(static_cast<std::uint64_t>(packet.entity));
+    write_buffer.write_string(packet.sound.substr(0, protocol::MAX_SOUNDNAME));
+    write_buffer.write_UI8(packet.looping);
+    write_buffer.write_FP32(packet.pitch);
+    return write_buffer.to_packet(flags);
+}
+
+ENetPacket *protocol::encode(const protocol::DimensionInfo &packet, enet_uint32 flags)
+{
+    write_buffer.reset();
+    write_buffer.write_UI16(protocol::DimensionInfo::ID);
+    write_buffer.write_string(packet.name);
+    write_buffer.write_FP32(packet.gravity);
+    return write_buffer.to_packet(flags);
+}
+
+void protocol::broadcast(ENetHost *host, ENetPacket *packet)
+{
+    if(packet) {
+        enet_host_broadcast(host, protocol::CHANNEL, packet);
+    }
+}
+
+void protocol::broadcast(ENetHost *host, ENetPacket *packet, ENetPeer *except)
+{
+    if(packet) {
+        for(unsigned int i = 0U; i < host->peerCount; ++i) {
+            if(host->peers[i].state == ENET_PEER_STATE_CONNECTED) {
+                if(&host->peers[i] == except)
+                    continue;
+                enet_peer_send(&host->peers[i], protocol::CHANNEL, packet);
+            }
+        }
+    }
+}
+
+void protocol::send(ENetPeer *peer, ENetPacket *packet)
+{
+    if(packet) {
+        enet_peer_send(peer, protocol::CHANNEL, packet);
+    }
+}
+
+void protocol::decode(entt::dispatcher &dispatcher, const ENetPacket *packet, ENetPeer *peer)
+{
+    read_buffer.reset(packet);
+
+    protocol::StatusRequest status_request;
+    protocol::StatusResponse status_response;
+    protocol::LoginRequest login_request;
+    protocol::LoginResponse login_response;
+    protocol::Disconnect disconnect;
+    protocol::ChunkVoxels chunk_voxels;
+    protocol::EntityTransform entity_transform;
+    protocol::EntityHead entity_head;
+    protocol::EntityVelocity entity_velocity;
+    protocol::SpawnPlayer spawn_player;
+    protocol::ChatMessage chat_message;
+    protocol::SetVoxel set_voxel;
+    protocol::RemoveEntity remove_entity;
+    protocol::EntityPlayer entity_player;
+    protocol::ScoreboardUpdate scoreboard_update;
+    protocol::RequestChunk request_chunk;
+    protocol::GenericSound generic_sound;
+    protocol::EntitySound entity_sound;
+    protocol::DimensionInfo dimension_info;
+    
+    auto id = read_buffer.read_UI16();
+    
+    switch(id) {
+        case protocol::StatusRequest::ID:
+            status_request.peer = peer;
+            status_request.version = read_buffer.read_UI32();
+            dispatcher.trigger(status_request);
+            break;
+        case protocol::StatusResponse::ID:
+            status_response.peer = peer;
+            status_response.version = read_buffer.read_UI32();
+            status_response.max_players = read_buffer.read_UI16();
+            status_response.num_players = read_buffer.read_UI16();
+            status_response.motd = read_buffer.read_string();
+            dispatcher.trigger(status_response);
+            break;
+        case protocol::LoginRequest::ID:
+            login_request.peer = peer;
+            login_request.version = read_buffer.read_UI32();
+            login_request.voxel_def_checksum = read_buffer.read_UI64();
+            login_request.item_def_checksum = read_buffer.read_UI64();
+            login_request.password_hash = read_buffer.read_UI64();
+            login_request.username = read_buffer.read_string();
+            dispatcher.trigger(login_request);
+            break;
+        case protocol::LoginResponse::ID:
+            login_response.peer = peer;
+            login_response.client_index = read_buffer.read_UI16();
+            login_response.client_identity = read_buffer.read_UI64();
+            login_response.server_tickrate = read_buffer.read_UI16();
+            dispatcher.trigger(login_response);
+            break;
+        case protocol::Disconnect::ID:
+            disconnect.peer = peer;
+            disconnect.reason = read_buffer.read_string();
+            dispatcher.trigger(disconnect);
+            break;
+        case protocol::ChunkVoxels::ID:
+            chunk_voxels.peer = peer;
+            chunk_voxels.chunk.x = read_buffer.read_I32();
+            chunk_voxels.chunk.y = read_buffer.read_I32();
+            chunk_voxels.chunk.z = read_buffer.read_I32();
+            chunk_voxels.voxels.deserialize(read_buffer);
+            dispatcher.trigger(chunk_voxels);
+            break;
+        case protocol::EntityTransform::ID:
+            entity_transform.peer = peer;
+            entity_transform.entity = static_cast<entt::entity>(read_buffer.read_UI64());
+            entity_transform.chunk.x = read_buffer.read_I32();
+            entity_transform.chunk.y = read_buffer.read_I32();
+            entity_transform.chunk.z = read_buffer.read_I32();
+            entity_transform.local.x = read_buffer.read_FP32();
+            entity_transform.local.y = read_buffer.read_FP32();
+            entity_transform.local.z = read_buffer.read_FP32();
+            entity_transform.angles.x = read_buffer.read_FP32();
+            entity_transform.angles.y = read_buffer.read_FP32();
+            entity_transform.angles.z = read_buffer.read_FP32();
+            dispatcher.trigger(entity_transform);
+            break;
+        case protocol::EntityHead::ID:
+            entity_head.peer = peer;
+            entity_head.entity = static_cast<entt::entity>(read_buffer.read_UI64());
+            entity_head.angles[0] = read_buffer.read_FP32();
+            entity_head.angles[1] = read_buffer.read_FP32();
+            entity_head.angles[2] = read_buffer.read_FP32();
+            dispatcher.trigger(entity_head);
+            break;
+        case protocol::EntityVelocity::ID:
+            entity_velocity.peer = peer;
+            entity_velocity.entity = static_cast<entt::entity>(read_buffer.read_UI64());
+            entity_velocity.value.x = read_buffer.read_FP32();
+            entity_velocity.value.y = read_buffer.read_FP32();
+            entity_velocity.value.z = read_buffer.read_FP32();
+            dispatcher.trigger(entity_velocity);
+            break;
+        case protocol::SpawnPlayer::ID:
+            spawn_player.peer = peer;
+            spawn_player.entity = static_cast<entt::entity>(read_buffer.read_UI64());
+            dispatcher.trigger(spawn_player);
+            break;
+        case protocol::ChatMessage::ID:
+            chat_message.peer = peer;
+            chat_message.type = read_buffer.read_UI16();
+            chat_message.sender = read_buffer.read_string();
+            chat_message.message = read_buffer.read_string();
+            dispatcher.trigger(chat_message);
+            break;
+        case protocol::SetVoxel::ID:
+            set_voxel.peer = peer;
+            set_voxel.vpos.x = read_buffer.read_I64();
+            set_voxel.vpos.y = read_buffer.read_I64();
+            set_voxel.vpos.z = read_buffer.read_I64();
+            set_voxel.voxel = read_buffer.read_UI16();
+            set_voxel.flags = read_buffer.read_UI16();
+            dispatcher.trigger(set_voxel);
+            break;
+        case protocol::RemoveEntity::ID:
+            remove_entity.peer = peer;
+            remove_entity.entity = static_cast<entt::entity>(read_buffer.read_UI64());
+            dispatcher.trigger(remove_entity);
+            break;
+        case protocol::EntityPlayer::ID:
+            entity_player.peer = peer;
+            entity_player.entity = static_cast<entt::entity>(read_buffer.read_UI64());
+            dispatcher.trigger(entity_player);
+            break;
+        case protocol::ScoreboardUpdate::ID:
+            scoreboard_update.peer = peer;
+            scoreboard_update.names.resize(read_buffer.read_UI16());
+            for(std::size_t i = 0; i < scoreboard_update.names.size(); ++i)
+                scoreboard_update.names[i] = read_buffer.read_string();
+            dispatcher.trigger(scoreboard_update);
+            break;
+        case protocol::RequestChunk::ID:
+            request_chunk.peer = peer;
+            request_chunk.cpos.x = read_buffer.read_UI32();
+            request_chunk.cpos.y = read_buffer.read_UI32();
+            request_chunk.cpos.z = read_buffer.read_UI32();
+            dispatcher.trigger(request_chunk);
+            break;
+        case protocol::GenericSound::ID:
+            generic_sound.peer = peer;
+            generic_sound.sound = read_buffer.read_string();
+            generic_sound.looping = read_buffer.read_UI8();
+            generic_sound.pitch = read_buffer.read_FP32();
+            dispatcher.trigger(generic_sound);
+            break;
+        case protocol::EntitySound::ID:
+            entity_sound.peer = peer;
+            entity_sound.entity = static_cast<entt::entity>(read_buffer.read_UI64());
+            entity_sound.sound = read_buffer.read_string();
+            entity_sound.looping = read_buffer.read_UI8();
+            entity_sound.pitch = read_buffer.read_FP32();
+            dispatcher.trigger(entity_sound);
+            break;
+        case protocol::DimensionInfo::ID:
+            dimension_info.peer = peer;
+            dimension_info.name = read_buffer.read_string();
+            dimension_info.gravity = read_buffer.read_FP32();
+            dispatcher.trigger(dimension_info);
+            break;
+    }
+}
+
+ENetPacket *protocol::utils::make_disconnect(const char *reason, enet_uint32 flags)
+{
+    protocol::Disconnect packet;
+    packet.reason = std::string(reason);
+    return protocol::encode(packet, flags);
+}
+
+ENetPacket *protocol::utils::make_chat_message(const char *message, enet_uint32 flags)
+{
+    protocol::ChatMessage packet;
+    packet.type = protocol::ChatMessage::TEXT_MESSAGE;
+    packet.message = std::string(message);
+    return protocol::encode(packet, flags);
+}
+
+ENetPacket *protocol::utils::make_chunk_voxels(Dimension *dimension, entt::entity entity, enet_uint32 flags)
+{
+    if(auto component = dimension->chunks.try_get<ChunkComponent>(entity)) {
+        protocol::ChunkVoxels packet;
+        packet.chunk = component->cpos;
+        packet.voxels = component->chunk->get_voxels();
+        return protocol::encode(packet, flags);
+    }
+
+    return nullptr;
+}
+
+ENetPacket *protocol::utils::make_entity_head(Dimension *dimension, entt::entity entity, enet_uint32 flags)
+{
+    if(auto component = dimension->entities.try_get<HeadComponent>(entity)) {
+        protocol::EntityHead packet;
+        packet.entity = entity;
+        packet.angles = component->angles;
+        return protocol::encode(packet, flags);
+    }
+
+    return nullptr;
+}
+
+ENetPacket *protocol::utils::make_entity_transform(Dimension *dimension, entt::entity entity, enet_uint32 flags)
+{
+    if(auto component = dimension->entities.try_get<TransformComponent>(entity)) {
+        protocol::EntityTransform packet;
+        packet.entity = entity;
+        packet.chunk = component->chunk;
+        packet.local = component->local;
+        packet.angles = component->angles;
+        return protocol::encode(packet, flags);
+    }
+
+    return nullptr;
+}
+
+ENetPacket *protocol::utils::make_entity_velocity(Dimension *dimension, entt::entity entity, enet_uint32 flags)
+{
+    if(auto component = dimension->entities.try_get<VelocityComponent>(entity)) {
+        protocol::EntityVelocity packet;
+        packet.entity = entity;
+        packet.value = component->value;
+        return protocol::encode(packet, flags);
+    }
+
+    return nullptr;
+}
+
+ENetPacket *protocol::utils::make_entity_player(Dimension *dimension, entt::entity entity, enet_uint32 flags)
+{
+    if(dimension->entities.any_of<PlayerComponent>(entity)) {
+        protocol::EntityPlayer packet;
+        packet.entity = entity;
+        return protocol::encode(packet, flags);
+    }
+
+    return nullptr;
+}
+
+ENetPacket *protocol::utils::make_dimension_info(const Dimension *dimension)
+{
+    protocol::DimensionInfo packet;
+    packet.name = dimension->get_name();
+    packet.gravity = dimension->get_gravity();
+    return protocol::encode(packet, ENET_PACKET_FLAG_RELIABLE);
+}