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
16#ifndef VIRTUAL_DEVICE_BUILDER_H
17#define VIRTUAL_DEVICE_BUILDER_H
18
19#include <memory>
20#include <vector>
21
22#include <linux/uinput.h>
23
24#include <nlohmann/json.hpp>
25#include "nocopyable.h"
26
27#include "virtual_device.h"
28#include "virtual_device_defines.h"
29
30namespace OHOS {
31namespace Msdp {
32namespace DeviceStatus {
33using json = nlohmann::json;
34class VirtualDeviceBuilder {
35public:
36    VirtualDeviceBuilder(const std::string &name, uint16_t bustype, uint16_t vendor, uint16_t product);
37    VirtualDeviceBuilder(const std::string &name, std::shared_ptr<VirtualDevice> vDev);
38    virtual ~VirtualDeviceBuilder();
39    DISALLOW_COPY_AND_MOVE(VirtualDeviceBuilder);
40    bool SetUp();
41    void Close();
42
43protected:
44    static void Daemonize();
45    static void Unmount(const char *name, const char *id);
46    static void WaitFor(const char *path, const char *name);
47    static void WaitFor(const char *name, int32_t timeout);
48    static int32_t ReadFile(const char *path, json &model);
49    static int32_t ScanFor(std::function<bool(std::shared_ptr<VirtualDevice>)> pred,
50        std::vector<std::shared_ptr<VirtualDevice>> &vDevs);
51    static std::shared_ptr<VirtualDevice> Select(std::vector<std::shared_ptr<VirtualDevice>> &vDevs, const char *name);
52    void SetResolution(const ResolutionInfo &resolutionInfo);
53    void SetAbsValue(const AbsInfo &absInfo);
54    virtual const std::vector<uint32_t> &GetAbs() const;
55    virtual const std::vector<uint32_t> &GetEventTypes() const;
56    virtual const std::vector<uint32_t> &GetKeys() const;
57    virtual const std::vector<uint32_t> &GetLeds() const;
58    virtual const std::vector<uint32_t> &GetMiscellaneous() const;
59    virtual const std::vector<uint32_t> &GetProperties() const;
60    virtual const std::vector<uint32_t> &GetRelBits() const;
61    virtual const std::vector<uint32_t> &GetRepeats() const;
62    virtual const std::vector<uint32_t> &GetSwitches() const;
63
64protected:
65    std::vector<uinput_abs_setup> absInit_;
66    std::vector<uint32_t> abs_;
67    std::vector<uint32_t> relBits_;
68    std::vector<uint32_t> switches_;
69    std::vector<uint32_t> repeats_;
70    std::vector<uint32_t> eventTypes_;
71    std::vector<uint32_t> keys_;
72    std::vector<uint32_t> properties_;
73    std::vector<uint32_t> leds_;
74    std::vector<uint32_t> miscellaneous_;
75
76private:
77    void SetPhys();
78    void SetSupportedEvents();
79    void SetAbsResolution();
80    void SetIdentity();
81    void CopyProperties(const std::string &name, std::shared_ptr<VirtualDevice> vDev);
82    void CopyIdentity(const std::string &name, std::shared_ptr<VirtualDevice> vDev);
83    void CopyAbsInfo(std::shared_ptr<VirtualDevice> vDev);
84    void CopyEvents(std::shared_ptr<VirtualDevice> vDev);
85    static void ConcatenationName(std::string &sLine);
86    static bool ExecuteUnmount(const char *id, const char *name, const std::string &direntName);
87
88private:
89    int32_t fd_ { -1 };
90    struct uinput_user_dev uinputDev_ {};
91    struct uinput_abs_setup uinputAbs_ {};
92    std::shared_ptr<VirtualDevice> vDev_ { nullptr };
93};
94} // namespace DeviceStatus
95} // namespace Msdp
96} // namespace OHOS
97#endif // VIRTUAL_DEVICE_BUILDER_H