Repo created

libs/map/isolines_manager.hpp

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+#pragma once
+
+#include "drape_frontend/drape_engine_safe_ptr.hpp"
+
+#include "indexer/data_source.hpp"
+#include "indexer/isolines_info.hpp"
+#include "indexer/mwm_set.hpp"
+
+#include "platform/local_country_file.hpp"
+
+#include "geometry/rect2d.hpp"
+#include "geometry/screenbase.hpp"
+
+#include <cstdint>
+#include <functional>
+#include <map>
+#include <optional>
+#include <set>
+#include <string>
+
+class IsolinesManager final
+{
+public:
+  enum class IsolinesState
+  {
+    Disabled,
+    Enabled,
+    ExpiredData,
+    NoData
+  };
+
+  using IsolinesStateChangedFn = std::function<void(IsolinesState)>;
+  using GetMwmsByRectFn = std::function<std::vector<MwmSet::MwmId>(m2::RectD const &)>;
+
+  IsolinesManager(DataSource & dataSource, GetMwmsByRectFn const & getMwmsByRectFn);
+
+  IsolinesState GetState() const;
+  void SetStateListener(IsolinesStateChangedFn const & onStateChangedFn);
+
+  void SetDrapeEngine(ref_ptr<df::DrapeEngine> engine);
+
+  void SetEnabled(bool enabled);
+  bool IsEnabled() const;
+
+  bool IsVisible() const;
+
+  void UpdateViewport(ScreenBase const & screen);
+  void Invalidate();
+
+  isolines::Quality GetDataQuality(MwmSet::MwmId const & id) const;
+
+  void OnMwmDeregistered(platform::LocalCountryFile const & countryFile);
+
+private:
+  enum class Availability
+  {
+    Available,
+    NoData,
+    ExpiredData
+  };
+
+  struct Info
+  {
+    Info() = default;
+    Info(Availability availability, isolines::Quality quality) : m_availability(availability), m_quality(quality) {}
+
+    Availability m_availability = Availability::NoData;
+    isolines::Quality m_quality = isolines::Quality::None;
+  };
+
+  void UpdateState();
+  void ChangeState(IsolinesState newState);
+  Info const & LoadIsolinesInfo(MwmSet::MwmId const & id) const;
+
+  IsolinesState m_state = IsolinesState::Disabled;
+  IsolinesStateChangedFn m_onStateChangedFn;
+
+  DataSource & m_dataSource;
+  GetMwmsByRectFn m_getMwmsByRectFn;
+
+  df::DrapeEngineSafePtr m_drapeEngine;
+
+  std::optional<ScreenBase> m_currentModelView;
+
+  std::vector<MwmSet::MwmId> m_lastMwms;
+  mutable std::map<MwmSet::MwmId, Info> m_mwmCache;
+};
+
+std::string DebugPrint(IsolinesManager::IsolinesState state);