Repo created

libs/search/query_saver.hpp

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+#pragma once
+
+#include <list>
+#include <string>
+
+namespace search
+{
+/// Saves last search queries for search suggestion.
+class QuerySaver
+{
+public:
+  /// Search request <locale, request>.
+  using SearchRequest = std::pair<std::string, std::string>;
+
+  QuerySaver();
+
+  void Add(SearchRequest const & query);
+
+  /// Returns several last saved queries from newest to oldest query.
+  /// @see kMaxSuggestionsCount in implementation file.
+  std::list<SearchRequest> const & Get() const { return m_topQueries; }
+
+  /// Clear last queries storage. All data will be lost.
+  void Clear();
+
+private:
+  friend void UnitTest_QuerySaverSerializerTest();
+  friend void UnitTest_QuerySaverCorruptedStringTest();
+  void Serialize(std::string & data) const;
+  void Deserialize(std::string const & data);
+
+  void Save();
+  void Load();
+
+  std::list<SearchRequest> m_topQueries;
+};
+}  // namespace search