Wind barb data packet

wxdata/source/scwx/wsr88d/rpg/wind_barb_data_packet.cpp

@@ -0,0 +1,151 @@
+#include <scwx/wsr88d/rpg/wind_barb_data_packet.hpp>
+
+#include <istream>
+#include <string>
+
+#include <boost/log/trivial.hpp>
+
+namespace scwx
+{
+namespace wsr88d
+{
+namespace rpg
+{
+
+static const std::string logPrefix_ =
+   "[scwx::wsr88d::rpg::wind_barb_data_packet] ";
+
+struct WindBarb
+{
+   uint16_t value_;
+   int16_t  xCoordinate_;
+   int16_t  yCoordinate_;
+   uint16_t directionOfWind_;
+   uint16_t windSpeed_;
+
+   WindBarb() :
+       value_ {0},
+       xCoordinate_ {0},
+       yCoordinate_ {0},
+       directionOfWind_ {0},
+       windSpeed_ {0}
+   {
+   }
+};
+
+class WindBarbDataPacketImpl
+{
+public:
+   explicit WindBarbDataPacketImpl() :
+       packetCode_ {0}, lengthOfBlock_ {0}, windBarb_ {}
+   {
+   }
+   ~WindBarbDataPacketImpl() = default;
+
+   uint16_t packetCode_;
+   uint16_t lengthOfBlock_;
+
+   std::vector<WindBarb> windBarb_;
+};
+
+WindBarbDataPacket::WindBarbDataPacket() :
+    p(std::make_unique<WindBarbDataPacketImpl>())
+{
+}
+WindBarbDataPacket::~WindBarbDataPacket() = default;
+
+WindBarbDataPacket::WindBarbDataPacket(WindBarbDataPacket&&) noexcept = default;
+WindBarbDataPacket&
+WindBarbDataPacket::operator=(WindBarbDataPacket&&) noexcept = default;
+
+uint16_t WindBarbDataPacket::packet_code() const
+{
+   return p->packetCode_;
+}
+
+uint16_t WindBarbDataPacket::length_of_block() const
+{
+   return p->lengthOfBlock_;
+}
+
+size_t WindBarbDataPacket::data_size() const
+{
+   return p->lengthOfBlock_ + 4u;
+}
+
+bool WindBarbDataPacket::Parse(std::istream& is)
+{
+   bool blockValid = true;
+
+   std::streampos isBegin = is.tellg();
+
+   is.read(reinterpret_cast<char*>(&p->packetCode_), 2);
+   is.read(reinterpret_cast<char*>(&p->lengthOfBlock_), 2);
+
+   p->packetCode_    = ntohs(p->packetCode_);
+   p->lengthOfBlock_ = ntohs(p->lengthOfBlock_);
+
+   if (is.eof())
+   {
+      BOOST_LOG_TRIVIAL(debug) << logPrefix_ << "Reached end of file";
+      blockValid = false;
+   }
+   else
+   {
+      if (p->packetCode_ != 4)
+      {
+         BOOST_LOG_TRIVIAL(warning)
+            << logPrefix_ << "Invalid packet code: " << p->packetCode_;
+         blockValid = false;
+      }
+   }
+
+   // The number of vectors is equal to the size divided by the number of bytes
+   // in a vector
+   size_t vectorCount = p->lengthOfBlock_ / 10;
+
+   p->windBarb_.resize(vectorCount);
+
+   for (int v = 0; v < vectorCount && !is.eof(); v++)
+   {
+      WindBarb& windBarb = p->windBarb_[v];
+
+      is.read(reinterpret_cast<char*>(&windBarb.value_), 2);
+      is.read(reinterpret_cast<char*>(&windBarb.xCoordinate_), 2);
+      is.read(reinterpret_cast<char*>(&windBarb.yCoordinate_), 2);
+      is.read(reinterpret_cast<char*>(&windBarb.directionOfWind_), 2);
+      is.read(reinterpret_cast<char*>(&windBarb.windSpeed_), 2);
+
+      windBarb.value_           = ntohs(windBarb.value_);
+      windBarb.xCoordinate_     = ntohs(windBarb.xCoordinate_);
+      windBarb.yCoordinate_     = ntohs(windBarb.yCoordinate_);
+      windBarb.directionOfWind_ = ntohs(windBarb.directionOfWind_);
+      windBarb.windSpeed_       = ntohs(windBarb.windSpeed_);
+   }
+
+   std::streampos isEnd = is.tellg();
+
+   if (!ValidateMessage(is, isEnd - isBegin))
+   {
+      blockValid = false;
+   }
+
+   return blockValid;
+}
+
+std::shared_ptr<WindBarbDataPacket> WindBarbDataPacket::Create(std::istream& is)
+{
+   std::shared_ptr<WindBarbDataPacket> packet =
+      std::make_shared<WindBarbDataPacket>();
+
+   if (!packet->Parse(is))
+   {
+      packet.reset();
+   }
+
+   return packet;
+}
+
+} // namespace rpg
+} // namespace wsr88d
+} // namespace scwx