[core] Version change tracking.

map/framework.cpp

@@ -1633,3 +1633,19 @@ string Framework::GenerateApiBackUrl(url_scheme::ApiPoint const & point)
   }
   return res;
 }
+
+bool Framework::IsDataVersionChanged()
+{
+  int64_t version;
+  if (Settings::Get("DataVersion", version))
+  {
+    return version != m_storage.GetCurrentDataVersion();
+  }
+  // no key in the settings, assume new version
+  return true;
+}
+
+void Framework::UpdateSavedDataVersion()
+{
+  Settings::Set("DataVersion", m_storage.GetCurrentDataVersion());
+}

map/framework.hpp

@@ -445,6 +445,8 @@ private:
   void SetViewPortASync(m2::RectD const & rect);
 
 public:
+  /// @name Api
+  //@{
   void MapApiSetUriAndParse(string const & url);
   bool GetMapApiPoint(m2::PointD const & pxPoint, url_scheme::ApiPoint & point);
   vector<url_scheme::ApiPoint> const & GetMapApiPoints() { return m_ParsedMapApi.GetPoints(); }
@@ -455,4 +457,11 @@ public:
   m2::RectD GetMapApiLatLonRect() const { return m_ParsedMapApi.GetLatLonRect(); }
   bool IsValidMapApi() const { return m_ParsedMapApi.IsValid(); }
   string GenerateApiBackUrl(url_scheme::ApiPoint const & point);
+  //@}
+
+  /// @name Map updates
+  //@{
+  bool IsDataVersionChanged();
+  void UpdateSavedDataVersion();
+  //@}
 };

storage/storage.cpp

@@ -463,4 +463,9 @@ namespace storage
 
     return fListNoExt.size();
   }
+
+  int64_t Storage::GetCurrentDataVersion()
+  {
+    return m_currentVersion;
+  }
 }

storage/storage.hpp

@@ -124,5 +124,7 @@ namespace storage
     /// @param list is populated with oudated countries
     /// @return number of outdated countries in the list
     int GetOutdatedCountries(vector<Country> & list);
+
+    int64_t GetCurrentDataVersion();
   };
 }