Repo created

libs/routing/absent_regions_finder.hpp

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+#pragma once
+
+#include "routing/regions_decl.hpp"
+#include "routing/router_delegate.hpp"
+
+#include "base/thread.hpp"
+
+#include <functional>
+#include <memory>
+#include <set>
+#include <string>
+
+namespace routing
+{
+using LocalFileCheckerFn = std::function<bool(std::string const &)>;
+
+// Encapsulates generation of mwm names of absent regions needed for building the route between
+// |checkpoints|. For this purpose the new thread is used.
+class AbsentRegionsFinder
+{
+public:
+  AbsentRegionsFinder(CountryFileGetterFn const & countryFileGetter, LocalFileCheckerFn const & localFileChecker,
+                      std::shared_ptr<NumMwmIds> numMwmIds, DataSource & dataSource);
+
+  // Creates new thread |m_routerThread| and starts routing in it.
+  void GenerateAbsentRegions(Checkpoints const & checkpoints, RouterDelegate const & delegate);
+  // Waits for the routing thread |m_routerThread| to finish and returns results from it.
+  void GetAllRegions(std::set<std::string> & countries);
+  // Waits for the results from GetAllRegions() and returns only regions absent on the device.
+  void GetAbsentRegions(std::set<std::string> & absentCountries);
+
+private:
+  bool AreCheckpointsInSameMwm(Checkpoints const & checkpoints) const;
+
+  CountryFileGetterFn const m_countryFileGetterFn;
+  LocalFileCheckerFn const m_localFileCheckerFn;
+
+  std::shared_ptr<NumMwmIds> m_numMwmIds;
+  DataSource & m_dataSource;
+
+  std::unique_ptr<threads::Thread> m_routerThread;
+};
+}  // namespace routing