New cpp folder structure

Signed-off-by: Alexander Borsuk <me@alex.bio>

libs/routing/checkpoints.hpp

@@ -0,0 +1,44 @@
+#pragma once
+
+#include "geometry/point2d.hpp"
+
+#include <string>
+#include <utility>
+#include <vector>
+
+namespace routing
+{
+class Checkpoints final
+{
+public:
+  Checkpoints() = default;
+  Checkpoints(m2::PointD const & start, m2::PointD const & finish) : m_points({start, finish}) {}
+  explicit Checkpoints(std::vector<m2::PointD> && points);
+
+  m2::PointD const & GetStart() const { return m_points.front(); }
+  m2::PointD const & GetFinish() const { return m_points.back(); }
+  std::vector<m2::PointD> const & GetPoints() const { return m_points; }
+  size_t GetPassedIdx() const { return m_passedIdx; }
+
+  void SetPointFrom(m2::PointD const & point);
+  m2::PointD const & GetPoint(size_t pointIdx) const;
+  m2::PointD const & GetPointFrom() const;
+  m2::PointD const & GetPointTo() const;
+
+  size_t GetNumSubroutes() const { return m_points.size() - 1; }
+  bool IsFinished() const { return m_passedIdx >= GetNumSubroutes(); }
+
+  double GetSummaryLengthBetweenPointsMeters() const;
+
+  void PassNextPoint();
+
+private:
+  // m_points contains start, finish and intermediate points.
+  std::vector<m2::PointD> m_points = {m2::PointD::Zero(), m2::PointD::Zero()};
+  // m_passedIdx is the index of the checkpoint by which the user passed by.
+  // By default, user has passed 0, it is start point.
+  size_t m_passedIdx = 0;
+};
+
+std::string DebugPrint(Checkpoints const & checkpoints);
+}  // namespace routing