[map] return the ElevationInfo for the current track recording

Signed-off-by: Kiryl Kaveryn <kirylkaveryn@gmail.com>

map/framework.cpp

@@ -1739,6 +1739,11 @@ void Framework::SetTrackRecordingUpdateHandler(TrackRecordingUpdateHandler && tr
     m_trackRecordingUpdateHandler(GpsTracker::Instance().GetTrackStatistics());
 }
 
+const ElevationInfo & Framework::GetTrackRecordingElevationInfo()
+{
+  return GpsTracker::Instance().GetElevationInfo();
+}
+
 void Framework::StopTrackRecording()
 {
   m_connectToGpsTrack = false;

map/framework.hpp

@@ -444,6 +444,9 @@ public:
   void SaveTrackRecordingWithName(std::string const & name);
   bool IsTrackRecordingEmpty() const;
   bool IsTrackRecordingEnabled() const;
+  /// Returns the elevation profile data of the currently recorded track.
+  /// To get the data on the every track recording state update, this function should be called after receiving the callback from the `SetTrackRecordingUpdateHandler`.
+  static const ElevationInfo & GetTrackRecordingElevationInfo();
 
   void SetMapStyle(MapStyle mapStyle);
   void MarkMapStyle(MapStyle mapStyle);

map/gps_track.cpp

@@ -84,6 +84,11 @@ TrackStatistics GpsTrack::GetTrackStatistics() const
   return m_collection ? m_collection->GetTrackStatistics() : TrackStatistics();
 }
 
+const ElevationInfo & GpsTrack::GetElevationInfo() const
+{
+  return m_collection->UpdateAndGetElevationInfo();
+}
+
 void GpsTrack::Clear()
 {
   {

map/gps_track.hpp

@@ -32,7 +32,8 @@ public:
 
   /// Returns track statistics
   TrackStatistics GetTrackStatistics() const;
-
+  const ElevationInfo & GetElevationInfo() const;
+  
   /// Clears any previous tracking info
   /// @note Callback is called with 'toRemove' points, if some points were removed.
   void Clear();

map/gps_track_collection.cpp

@@ -33,6 +33,7 @@ size_t const GpsTrackCollection::kInvalidId = std::numeric_limits<size_t>::max()
 
 GpsTrackCollection::GpsTrackCollection()
   : m_lastId(0)
+  , m_elevationInfoDirty(true)
 {}
 
 std::pair<size_t, size_t> GpsTrackCollection::Add(std::vector<TItem> const & items)
@@ -54,6 +55,8 @@ std::pair<size_t, size_t> GpsTrackCollection::Add(std::vector<TItem> const & ite
     ++added;
   }
 
+  m_elevationInfoDirty = true;
+
   rollbacker.Reset();
 
   if (0 == added)
@@ -85,6 +88,7 @@ std::pair<size_t, size_t> GpsTrackCollection::Clear(bool resetIds)
   m_items.clear();
   m_items.shrink_to_fit();
   m_statistics = {};
+  m_elevationInfo = {};
 
   if (resetIds)
     m_lastId = 0;
@@ -97,6 +101,21 @@ size_t GpsTrackCollection::GetSize() const
   return m_items.size();
 }
 
+const ElevationInfo & GpsTrackCollection::UpdateAndGetElevationInfo()
+{
+  if (!m_elevationInfoDirty)
+    return m_elevationInfo;
+
+  auto const elevationInfoSize = m_elevationInfo.GetSize();
+  if (elevationInfoSize < m_items.size())
+  {
+    std::vector<TItem> const missedPoints(m_items.begin() + elevationInfoSize, m_items.end());
+    m_elevationInfo.AddGpsPoints(missedPoints);
+  }
+  m_elevationInfoDirty = false;
+  return m_elevationInfo;
+}
+
 bool GpsTrackCollection::IsEmpty() const
 {
   return m_items.empty();

map/gps_track_collection.hpp

@@ -41,6 +41,8 @@ public:
 
   /// Returns track statistics.
   const TrackStatistics GetTrackStatistics() const { return m_statistics; }
+  /// Updates the elevation info with the missed points and returns a reference.
+  const ElevationInfo & UpdateAndGetElevationInfo();
 
   /// Enumerates items in the collection.
   /// @param f - callable object, which is called with params - item and item id,
@@ -67,4 +69,6 @@ private:
 
   size_t m_lastId;
   TrackStatistics m_statistics;
+  ElevationInfo m_elevationInfo;
+  bool m_elevationInfoDirty;
 };

map/gps_tracker.cpp

@@ -85,6 +85,11 @@ TrackStatistics GpsTracker::GetTrackStatistics() const
   return m_track.GetTrackStatistics();
 }
 
+const ElevationInfo & GpsTracker::GetElevationInfo() const
+{
+  return m_track.GetElevationInfo();
+}
+
 void GpsTracker::Connect(TGpsTrackDiffCallback const & fn)
 {
   m_track.SetCallback(fn);

map/gps_tracker.hpp

@@ -19,6 +19,7 @@ public:
   bool IsEmpty() const;
   size_t GetTrackSize() const;
   TrackStatistics GetTrackStatistics() const;
+  const ElevationInfo & GetElevationInfo() const;
 
   using TGpsTrackDiffCallback =
       std::function<void(std::vector<std::pair<size_t, location::GpsInfo>> && toAdd,