1 /*
2  * Copyright (c) 2024 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 PREFERENCES_IMPL_H
16 #define PREFERENCES_IMPL_H
17 
18 #include <string>
19 
20 #include "preferences.h"
21 #include "preferences_interface.h"
22 #include "ffi_remote_data.h"
23 #include "ability_context.h"
24 #include "preferences_observer.h"
25 
26 namespace OHOS {
27 namespace Preferences {
28 using RegisterMode = NativePreferences::PreferencesObserver::RegisterMode;
29 
30 class CJPreferencesObserver : public OHOS::NativePreferences::PreferencesObserver {
31 public:
32     CJPreferencesObserver(std::function<void(std::string)> *callback,
33         const std::function<void(std::string)>& callbackRef);
34     void OnChange(const std::string &key) override;
35     std::function<void(std::string)> *m_callback;
36     std::function<void(std::string)> m_callbackRef;
37 };
38 
39 class PreferencesImpl : public OHOS::FFI::FFIData {
40 public:
41     explicit PreferencesImpl(OHOS::AbilityRuntime::Context* context,
42         const std::string& name, const std::string& dataGroupId, int32_t* errCode);
43 
44     static int32_t DeletePreferences(OHOS::AbilityRuntime::Context* context, const std::string &name,
45         const std::string &dataGroupId);
46 
47     static int32_t RemovePreferencesFromCache(OHOS::AbilityRuntime::Context* context, const std::string &name,
48         const std::string &dataGroupId);
49 
50     int32_t Delete(const std::string &key);
51 
52     bool HasKey(const std::string &key);
53 
54     bool HasRegisteredObserver(std::function<void(std::string)> *callback, RegisterMode mode);
55 
56     int32_t RegisterObserver(const std::string &mode, std::function<void(std::string)> *callback,
57         const std::function<void(std::string)>& callbackRef);
58 
59     int32_t UnRegisterObserver(const std::string &mode, std::function<void(std::string)> *callback);
60 
61     int32_t UnRegisteredAllObservers(const std::string &mode);
62 
63     RegisterMode ConvertToRegisterMode(const std::string &mode);
64 
65     ValueType Get(const std::string &key, const ValueType &defValue);
66 
67     int32_t Put(const std::string &key, const ValueType &value);
68 
69     ValueTypes GetAll();
70 
71     void Flush();
72 
73     void Clear();
74 
75     OHOS::FFI::RuntimeType* GetRuntimeType() override;
76 
77 private:
78     friend class OHOS::FFI::TypeBase;
79     friend class OHOS::FFI::RuntimeType;
80     static OHOS::FFI::RuntimeType* GetClassType();
81     static constexpr char strChange[] = "change";
82     static constexpr char strMultiProcessChange[] = "multiProcessChange";
83     std::shared_ptr<NativePreferences::Preferences> preferences;
84     std::mutex listMutex_ {};
85     std::list<std::shared_ptr<CJPreferencesObserver>> localObservers_;
86     std::list<std::shared_ptr<CJPreferencesObserver>> multiProcessObservers_;
87 };
88 }
89 } // namespace OHOS::Preferences
90 
91 #endif // PREFERENCES_IMPL_h