1 /* 2 * Copyright (c) 2022 Huawei Device Co., Ltd. 3 * Licensed under the Apache License, Version 2.0 (the "License"); 4 * you may not use this file except in compliance with the License. 5 * You may obtain a copy of the License at 6 * 7 * http://www.apache.org/licenses/LICENSE-2.0 8 * 9 * Unless required by applicable law or agreed to in writing, software 10 * distributed under the License is distributed on an "AS IS" BASIS, 11 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 12 * See the License for the specific language governing permissions and 13 * limitations under the License. 14 */ 15 #ifndef PASTEBOARD_ASYNC_CALL_H 16 #define PASTEBOARD_ASYNC_CALL_H 17 18 #include <functional> 19 #include <memory> 20 #include <string> 21 22 #include "napi/native_api.h" 23 #include "napi/native_common.h" 24 #include "napi/native_node_api.h" 25 26 namespace OHOS::MiscServicesNapi { 27 class AsyncCall final { 28 public: 29 class Context { 30 public: 31 using InputAction = std::function<napi_status(napi_env, size_t, napi_value *, napi_value)>; 32 using OutputAction = std::function<napi_status(napi_env, napi_value *)>; 33 using ExecAction = std::function<void(Context *)>; Context()34 Context(){}; Context(InputAction input,OutputAction output)35 Context(InputAction input, OutputAction output) : input_(std::move(input)), output_(std::move(output)){}; ~Context()36 virtual ~Context(){}; 37 void SetAction(InputAction input, OutputAction output = nullptr) 38 { 39 input_ = input; 40 output_ = output; 41 } 42 SetAction(OutputAction output)43 void SetAction(OutputAction output) 44 { 45 SetAction(nullptr, std::move(output)); 46 } 47 SetErrInfo(int32_t errCode,std::string errMsg)48 void SetErrInfo(int32_t errCode, std::string errMsg) 49 { 50 errCode_ = errCode; 51 errMsg_ = errMsg; 52 } 53 operator()54 virtual napi_status operator()(napi_env env, size_t argc, napi_value *argv, napi_value self) 55 { 56 if (input_ == nullptr) { 57 return napi_ok; 58 } 59 return input_(env, argc, argv, self); 60 } 61 operator()62 virtual napi_status operator()(napi_env env, napi_value *result) 63 { 64 if (output_ == nullptr) { 65 *result = nullptr; 66 return napi_ok; 67 } 68 return output_(env, result); 69 } 70 Exec()71 virtual void Exec() 72 { 73 if (exec_ == nullptr) { 74 return; 75 } 76 exec_(this); 77 }; 78 79 protected: 80 friend class AsyncCall; 81 InputAction input_ = nullptr; 82 OutputAction output_ = nullptr; 83 ExecAction exec_ = nullptr; 84 int32_t errCode_ = 0; 85 std::string errMsg_; 86 }; 87 88 // The default AsyncCallback in the parameters is at the end position. 89 static constexpr size_t ASYNC_DEFAULT_POS = -1; 90 AsyncCall(napi_env env, napi_callback_info info, std::shared_ptr<Context> context, size_t pos = ASYNC_DEFAULT_POS); 91 ~AsyncCall(); 92 napi_value Call(napi_env env, Context::ExecAction exec = nullptr); 93 napi_value SyncCall(napi_env env, Context::ExecAction exec = nullptr); 94 95 private: 96 enum arg : int { ARG_ERROR, ARG_DATA, ARG_BUTT }; 97 static void OnExecute(napi_env env, void *data); 98 static void OnComplete(napi_env env, napi_status status, void *data); 99 struct AsyncContext { 100 std::shared_ptr<Context> ctx = nullptr; 101 napi_ref callback = nullptr; 102 napi_ref self = nullptr; 103 napi_deferred defer = nullptr; 104 napi_async_work work = nullptr; 105 }; 106 static void DeleteContext(napi_env env, AsyncContext *context); 107 108 AsyncContext *context_ = nullptr; 109 napi_env env_ = nullptr; 110 }; 111 } // namespace OHOS::MiscServicesNapi 112 113 #endif // PASTEBOARD_ASYNC_CALL_H 114