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#include "tracking/protocol.hpp"
#include "coding/endianness.hpp"
#include "base/assert.hpp"
#include "std/cstdint.hpp"
namespace tracking
{
uint8_t const Protocol::kOk[4] = {'O', 'K', '\n', '\n'};
uint8_t const Protocol::kFail[4] = {'F', 'A', 'I', 'L'};
static_assert(sizeof(Protocol::kFail) >= sizeof(Protocol::kOk), "");
vector<uint8_t> Protocol::CreateAuthPacket(string const & clientId)
{
vector<uint8_t> packet;
InitHeader(packet, PacketType::CurrentAuth, static_cast<uint32_t>(clientId.size()));
packet.insert(packet.end(), begin(clientId), end(clientId));
return packet;
}
vector<uint8_t> Protocol::CreateDataPacket(DataElements const & points)
{
vector<uint8_t> buffer;
MemWriter<decltype(buffer)> writer(buffer);
Encoder::SerializeDataPoints(Encoder::kLatestVersion, writer, points);
vector<uint8_t> packet;
InitHeader(packet, PacketType::CurrentData, static_cast<uint32_t>(buffer.size()));
packet.insert(packet.end(), begin(buffer), end(buffer));
return packet;
}
void Protocol::InitHeader(vector<uint8_t> & packet, PacketType type, uint32_t payloadSize)
{
packet.resize(sizeof(uint32_t));
uint32_t & size = *reinterpret_cast<uint32_t *>(packet.data());
size = payloadSize;
ASSERT_LESS(size, 0x00FFFFFF, ());
if (!IsBigEndian())
size = ReverseByteOrder(size);
packet[0] = static_cast<uint8_t>(type);
}
string DebugPrint(Protocol::PacketType type)
{
switch (type)
{
case Protocol::PacketType::AuthV0: return "AuthV0";
case Protocol::PacketType::DataV0: return "DataV0";
default: return "Unknown";
}
}
} // namespace tracking
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