1 /* 2 * Copyright (c) 2023 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 SYSTEM_EVENT_OBSERVER_H 16 #define SYSTEM_EVENT_OBSERVER_H 17 18 #include <memory> 19 #include <mutex> 20 #include <functional> 21 #include "common_event_subscriber.h" 22 #include "event_handler.h" 23 24 namespace OHOS { 25 namespace IntellVoiceEngine { 26 using SystemEventReceiver = std::function<void(const OHOS::EventFwk::CommonEventData&)>; 27 class SystemEventObserver : public OHOS::EventFwk::CommonEventSubscriber, 28 public std::enable_shared_from_this<SystemEventObserver> { 29 public: 30 ~SystemEventObserver(); 31 static std::shared_ptr<SystemEventObserver> Create(const OHOS::EventFwk::CommonEventSubscribeInfo &subscribeInfo, 32 SystemEventReceiver receiver); GetPtr()33 std::shared_ptr<SystemEventObserver> GetPtr() 34 { 35 return shared_from_this(); 36 } 37 void OnReceiveEvent(const OHOS::EventFwk::CommonEventData &eventData) override; 38 bool Subscribe(); 39 bool Unsubscribe(); 40 41 private: 42 enum SubscribeState { 43 IDLE = 0, 44 SUBSCRIBED = 1, 45 UNSUBSCRIBED = 2, 46 }; 47 48 private: 49 SystemEventObserver(const OHOS::EventFwk::CommonEventSubscribeInfo &subscribeInfo, 50 SystemEventReceiver receiver); 51 SubscribeState state_ = IDLE; 52 std::mutex mutex_; 53 SystemEventReceiver receiver_; 54 }; 55 } 56 } 57 #endif