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#include "tracking/protocol.hpp"
#include "coding/endianness.hpp"
#include "coding/writer.hpp"
#include "base/assert.hpp"
#include "std/cstdint.hpp"
#include "std/sstream.hpp"
namespace
{
template <typename Container>
vector<uint8_t> CreateDataPacketImpl(Container const & points)
{
vector<uint8_t> buffer;
MemWriter<decltype(buffer)> writer(buffer);
tracking::Protocol::Encoder::SerializeDataPoints(tracking::Protocol::Encoder::kLatestVersion,
writer, points);
auto packet = tracking::Protocol::CreateHeader(tracking::Protocol::PacketType::CurrentData,
static_cast<uint32_t>(buffer.size()));
packet.insert(packet.end(), begin(buffer), end(buffer));
return packet;
}
} // namespace
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), "");
// static
vector<uint8_t> Protocol::CreateHeader(PacketType type, uint32_t payloadSize)
{
vector<uint8_t> header;
InitHeader(header, type, payloadSize);
return header;
}
// static
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;
}
// static
vector<uint8_t> Protocol::CreateDataPacket(DataElementsCirc const & points)
{
return CreateDataPacketImpl(points);
}
// static
vector<uint8_t> Protocol::CreateDataPacket(DataElementsVec const & points)
{
return CreateDataPacketImpl(points);
}
// static
pair<Protocol::PacketType, size_t> Protocol::DecodeHeader(vector<uint8_t> const & data)
{
ASSERT_GREATER_OR_EQUAL(data.size(), sizeof(uint32_t /* header */), ());
uint32_t size = (*reinterpret_cast<uint32_t const *>(data.data())) & 0xFFFFFF00;
if (!IsBigEndian())
size = ReverseByteOrder(size);
return make_pair(PacketType(static_cast<uint8_t>(data[0])), size);
}
// static
string Protocol::DecodeAuthPacket(Protocol::PacketType type, vector<uint8_t> const & data)
{
ASSERT_GREATER_OR_EQUAL(data.size(), sizeof(uint32_t /* header */), ());
switch (type)
{
case Protocol::PacketType::AuthV0:
return string(begin(data) + sizeof(uint32_t /* header */), end(data));
case Protocol::PacketType::DataV0: break;
}
return string();
}
// static
Protocol::DataElementsVec Protocol::DecodeDataPacket(PacketType type, vector<uint8_t> const & data)
{
ASSERT_GREATER_OR_EQUAL(data.size(), sizeof(uint32_t /* header */), ());
DataElementsVec points;
MemReader memReader(data.data(), data.size());
ReaderSource<MemReader> src(memReader);
src.Skip(sizeof(uint32_t /* header */));
switch (type)
{
case Protocol::PacketType::DataV0:
Encoder::DeserializeDataPoints(Encoder::kLatestVersion, src, points);
break;
case Protocol::PacketType::AuthV0: break;
}
return points;
}
// static
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";
}
stringstream ss;
ss << "Unknown(" << static_cast<uint32_t>(type) << ")";
return ss.str();
}
} // namespace tracking
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