New cpp folder structure

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

libs/map/features_fetcher.hpp

@@ -0,0 +1,79 @@
+#pragma once
+
+#include "editor/editable_data_source.hpp"
+
+#include "indexer/mwm_set.hpp"
+
+#include "geometry/rect2d.hpp"
+
+#include "coding/reader.hpp"
+
+#include <functional>
+#include <string>
+#include <utility>
+#include <vector>
+
+class FeaturesFetcher : public MwmSet::Observer
+{
+public:
+  using Reader = ModelReaderPtr;
+
+  using MapDeregisteredCallback = std::function<void(platform::LocalCountryFile const &)>;
+
+  FeaturesFetcher();
+
+  virtual ~FeaturesFetcher();
+
+  void InitClassificator();
+
+  void SetOnMapDeregisteredCallback(MapDeregisteredCallback const & callback)
+  {
+    m_onMapDeregistered = callback;
+  }
+
+  // Registers a new map.
+  std::pair<MwmSet::MwmId, MwmSet::RegResult> RegisterMap(platform::LocalCountryFile const & localFile);
+
+  // Deregisters a map denoted by file from internal records.
+  bool DeregisterMap(platform::CountryFile const & countryFile);
+
+  void Clear();
+
+  void ClearCaches();
+
+  bool IsLoaded(std::string_view countryFileName) const
+  {
+    return m_dataSource.IsLoaded(platform::CountryFile(std::string(countryFileName)));
+  }
+
+  void ForEachFeature(m2::RectD const & rect, std::function<void(FeatureType &)> const & fn, int scale) const
+  {
+    m_dataSource.ForEachInRect(fn, rect, scale);
+  }
+
+  void ForEachFeatureID(m2::RectD const & rect, std::function<void(FeatureID const &)> const & fn, int scale) const
+  {
+    // Pass lightweight LowLevelsOnly mode, because rect is equal with pow 2 tiles.
+    m_dataSource.ForEachFeatureIDInRect(fn, rect, scale, covering::LowLevelsOnly);
+  }
+
+  template <class ToDo>
+  void ReadFeatures(ToDo & toDo, std::vector<FeatureID> const & features) const
+  {
+    m_dataSource.ReadFeatures(toDo, features);
+  }
+
+  DataSource const & GetDataSource() const { return m_dataSource; }
+  DataSource & GetDataSource() { return m_dataSource; }
+  m2::RectD GetWorldRect() const;
+
+  // MwmSet::Observer overrides:
+  void OnMapDeregistered(platform::LocalCountryFile const & localFile) override;
+
+private:
+  m2::RectD m_rect;
+
+  EditableDataSource m_dataSource;
+
+  MapDeregisteredCallback m_onMapDeregistered;
+};