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58 lines
2.1 KiB
C++
58 lines
2.1 KiB
C++
#pragma once
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#include <memory>
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#include <string>
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#include <unordered_map>
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#include <vector>
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namespace platform
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{
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// class GetTextById is ready to work with different sources of text strings.
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// For the time being it's only strings for TTS.
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enum class TextSource
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{
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TtsSound = 0, //!< Maneuvers text to speech strings.
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Countries, //!< Countries names strings.
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};
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class GetTextById;
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using TGetTextByIdPtr = std::unique_ptr<GetTextById>;
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using TTranslations = std::vector<std::pair<std::string, std::string>>;
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/// GetTextById represents text messages which are saved in textsDir
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/// in a specified locale.
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class GetTextById
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{
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public:
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/// @return a pair of a text string in a specified locale for textId and a boolean flag.
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/// If textId is found in m_localeTexts then the boolean flag is set to true.
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/// The boolean flag is set to false otherwise.
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std::string operator()(std::string const & textId) const;
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std::string GetLocale() const { return m_locale; }
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TTranslations GetAllSortedTranslations() const;
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static TGetTextByIdPtr Create(std::string const & jsonBuffer, std::string const & localeName);
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private:
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GetTextById(std::string const & jsonBuffer, std::string const & localeName);
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/// \note IsValid is used only in factories and shall be private.
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bool IsValid() const { return !m_localeTexts.empty(); }
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std::string m_locale;
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std::unordered_map<std::string, std::string> m_localeTexts;
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};
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/// Factories to create GetTextById instances.
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/// If TGetTextByIdPtr is created by GetTextByIdFactory or ForTestingGetTextByIdFactory
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/// there are only two possibities:
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/// * a factory returns a valid instance
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/// * a factory returns nullptr
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TGetTextByIdPtr GetTextByIdFactory(TextSource textSource, std::string const & localeName);
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TGetTextByIdPtr ForTestingGetTextByIdFactory(std::string const & jsonBuffer, std::string const & localeName);
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/// \bried fills jsonBuffer with json file in twine format with strings in a language of localeName.
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/// @return true if no error was happened and false otherwise.
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bool GetJsonBuffer(platform::TextSource textSource, std::string const & localeName, std::string & jsonBuffer);
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} // namespace platform
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