1 /* 2 * Copyright (c) 2021 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 16 #ifndef NATIVE_MODULE_SEND_FILE_EVENT_AGENT_H 17 #define NATIVE_MODULE_SEND_FILE_EVENT_AGENT_H 18 19 #include <set> 20 #include <mutex> 21 22 #include "napi/native_api.h" 23 24 namespace OHOS { 25 namespace Storage { 26 namespace DistributedFile { 27 namespace { 28 constexpr int32_t LISTENER_TYPTE_MAX_LENGTH = 64; 29 } 30 31 struct EventListener { 32 char type[LISTENER_TYPTE_MAX_LENGTH] = { 0 }; 33 bool isOnce = false; 34 napi_ref handlerRef = nullptr; 35 EventListener* back = nullptr; 36 EventListener* next = nullptr; 37 }; 38 39 class Event { 40 public: 41 virtual napi_value ToJsObject(napi_env env) = 0; 42 }; 43 44 class EventAgent { 45 public: 46 EventAgent(napi_env env, napi_value thisVar); 47 virtual ~EventAgent(); 48 49 void On(const char* type, napi_value handler); 50 void Off(const char* type, napi_value handler); 51 void Off(const char* type); 52 void Emit(const char* type, Event* event); 53 void InsertDevice(const std::string&); 54 void RemoveDevice(const std::string&); 55 bool FindDevice(const std::string&); 56 void ClearDevice(); 57 58 protected: 59 std::mutex deviceListMut_; 60 std::set<std::string> deviceList_; 61 napi_env env_; 62 napi_ref thisVarRef_; 63 EventListener* first_; 64 EventListener* last_; 65 }; 66 } // namespace DistributedFile 67 } // namespace Storage 68 } // namespace OHOS 69 #endif /* NATIVE_MODULE_SEND_FILE_EVENT_AGENT_H */