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/* This file is part of the Spring engine (GPL v2 or later), see LICENSE.html */
#include "ChatMessage.h"
#include "Net/Protocol/BaseNetProtocol.h"
#include "System/Net/PackPacket.h"
#include "System/Net/UnpackPacket.h"
ChatMessage::ChatMessage(int from, int dest, const std::string& chat)
: fromPlayer(from)
, destination(dest)
{
// restrict all (player and autohost) chat-messages before they get Pack()'ed
msg.resize(std::min(chat.size(), MAX_MSG_SIZE));
const auto beg = chat.begin();
const auto end = chat.begin() + msg.size();
std::fill(msg.begin(), msg.end(), 0);
std::copy(beg, end, msg.begin());
}
ChatMessage::ChatMessage(std::shared_ptr<const netcode::RawPacket> data)
{
assert(data->data[0] == NETMSG_CHAT);
assert(data->length <= (4 * sizeof(uint8_t) + MAX_MSG_SIZE + 1));
netcode::UnpackPacket packet(data, 2);
uint8_t from;
uint8_t dest;
packet >> from;
packet >> dest;
packet >> msg;
fromPlayer = from;
destination = dest;
}
const netcode::RawPacket* ChatMessage::Pack() const
{
// message id (uint8), size (uint8), from (uint8), dest (uint8), len(msg)+null
// msg.size() itself is clamped to MAX_MSG_SIZE == UINT8_MAX/2 by construction
constexpr uint8_t headerSize = 4 * sizeof(uint8_t);
const uint8_t messageSize = static_cast<uint8_t>(msg.size() + 1);
const uint8_t packetSize = headerSize + messageSize;
assert(packetSize <= (headerSize + MAX_MSG_SIZE + 1));
netcode::PackPacket* buffer = new netcode::PackPacket(packetSize, NETMSG_CHAT);
*buffer << packetSize;
*buffer << static_cast<uint8_t>(fromPlayer);
*buffer << static_cast<uint8_t>(destination);
*buffer << msg;
return buffer;
}
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