Created
April 23, 2020 22:44
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| template <class T> | |
| constexpr bool is_string(){ | |
| return std::is_same<char *, typename std::decay< T >::type >::value | |
| || std::is_same< const char *, typename std::decay< T >::type >::value | |
| || std::is_same<std::string, typename std::decay<T>::type>::value; | |
| }; | |
| template<typename FuncType = std::function<int()>,bool IsReturnValue = false> | |
| class FuncWorker : public Napi::AsyncWorker | |
| { | |
| public: | |
| FuncWorker(Statement &stmt, Napi::Env env, Napi::Promise::Deferred *deferred, FuncType &executeFunc) | |
| : AsyncWorker(env), stmt_(stmt), deferred_(deferred), executeFunc_(executeFunc) | |
| { | |
| } | |
| virtual ~FuncWorker() | |
| { | |
| } | |
| void Execute() override | |
| { | |
| result_ = executeFunc_(); | |
| //int status =SQLITE_OK; | |
| if constexpr (!IsReturnValue){ | |
| if (result_ != SQLITE_OK && result_ != SQLITE_DONE) | |
| { | |
| std::string errorMessage(sqlite3_errmsg(const_cast<sqlite3 *>(stmt_.db().handle()))); | |
| SetError("Error:" + errorMessage); | |
| return; | |
| } | |
| } | |
| } | |
| void OnOK() override | |
| { | |
| if constexpr (is_string<typename FuncType::result_type>()){ | |
| deferred_->Resolve(Napi::String::New(Env(),result_)); | |
| } else if constexpr (std::is_arithmetic<typename FuncType::result_type>::value){ | |
| deferred_->Resolve(Napi::Number::New(Env(),result_)); | |
| } | |
| } | |
| void OnError(Napi::Error const &error) override | |
| { | |
| deferred_->Reject(error.Value()); | |
| } | |
| private: | |
| Statement &stmt_; | |
| std::unique_ptr<Napi::Promise::Deferred> deferred_; | |
| FuncType executeFunc_; | |
| typename FuncType::result_type result_; | |
| }; |
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