DeviceManager

foundation/distributedhardware/device_manager
├── common                        # Header files of common capabilities
│   └── include
│       └── ipc
│           └── model             # Header files of the IPC function module
├── display                       # Display HAP code
│   └── entry
│       └── src
│           └── main
│               ├── js            # JS code for the PIN display ServiceExtensionAbility
│               └── resources     # Resource configuration files for PIN display ServiceExtensionAbility
├── figures
├── interfaces
│   ├── inner_kits                # Internal interfaces and their implementation
│   │   └── native_cpp            # Internal native interfaces and their implementation
│   │       ├── include
│   │       │   ├── ipc           # IPC header files
│   │       │   │   ├── lite      # Small system
│   │       │   │   └── standard  # Standard system
│   │       │   └── notify        # IPC callback header files
│   │       └── src
│   │           ├── ipc           # IPC core code
│   │           │   ├── lite      # Small system
│   │           │   └── standard  # Standard system
│   │           └── notify         IPC callback core code
│   └── kits                      # External interfaces and their implementation
│       └── js                    # External JS interfaces and their implementation
│           ├── include           # External JS interfaces and their implementation files
│           └── src               # External JS interface and their implementation code
├── sa_profile
├── services
│   └── devicemanagerservice      # devicemanagerservice core code
│       ├── include
│       │   ├── ability           # Header files related to PIN display ServiceExtensionAbility startup management
│       │   ├── auth              # Header files related to device authentication
│       │   ├── ipc               # IPC header files
│       │   │   ├── lite          # Small system
│       │   │   └── standard      # Standard system
│       │   ├── message           # Header files related to message parsing
│       │   ├── requestauth       # Header files related to device authentication
│       │   ├── softbus           # Header files related to DSoftBus
│       │   └── timer             # Header files related to timer processing
│       └── src
│           ├── ability           # Core code related to PIN display ServiceExtensionAbility startup management
│           │   ├── lite          # Small system
│           │   └── standard      # Standard system
│           ├── auth              # Core code related to device authentication
│           ├── ipc               # IPC core code
│           │   ├── lite          # Small system
│           │   └── standard      # Standard system
│           ├── message           # Core code for message parsing
│           ├── requestauth       # Core code for device authentication
│           ├── softbus           # Core code for DSoftBus
│           └── timer             # Core code for timer processing
└── utils                         # Header files of utils
    ├── include
    │   ├── cipher                # Header files related to encryption and decryption
    │   ├── ipc                   # IPC common header files
    │   │   ├── lite              # Small system
    │   │   └── standard          # Standard system
    │   └── log                   # Log-related header files
    └── src
        ├── cipher                # Core code of encryption and decryption
        ├── ipc                   # IPC common core code
        │   ├── lite              # Small system
        │   └── standard          # Standard system
        └── log                   # Log-related core code

// Create a DeviceManager instance.
deviceManager.createDeviceManager('com.ohos.xxxx', (err, dm) => {
    this.log("createDeviceManager err:" + JSON.stringify(err) + '  --success:' + JSON.stringify(dm))
    if (err) return;
    dmClass = dm;
    dmClass.on('serviceDie', data => this.log("serviceDie on:" + JSON.stringify(data)))
});

// Subscribe to/Unsubscribe from device state changes.
dmClass.on('deviceStateChange', (data) => {
    this.log("deviceStateChange on:" + JSON.stringify(data));
    switch (data.action) {
      case ONLINE: 
        // the device is physically online
        break;
      case READY:
        // the information between devices has been synchronized in the Distributed Data Service (DDS) module,
        // and the device is ready for running distributed services
        break;
      case OFFLINE:
        // the device is physically offline
        break;
      case CHANGE:
        // the device information is changed
        break;
      default:
        break;
    }
});
dmClass.off('deviceStateChange')

// Query the trusted device list.
var array = dmClass.getTrustedDeviceListSync();

// Obtain the local device information.
var localDeviceInfo = dmClass.getLocalDeviceInfoSync();

// Start device discovery (to discover peripheral untrusted devices).
var subscribeId = 0;
dmClass.on('deviceFound', (data) => {
    if (data == null) {
        this.log("deviceFound error data=null")
        return;
    }
    this.logList.push("deviceFound:" + JSON.stringify(data));
});
dmClass.on('discoverFail', (data) => {
    this.log("discoverFail on:" + JSON.stringify(data));
});
subscribeId = Math.floor(Math.random() * 10000 + 1000)
var info = {
    "subscribeId": subscribeId,
    "mode": 0xAA,
    "medium": 0,
    "freq": 2,
    "isSameAccount": false,
    "isWakeRemote": true,
    "capability": 0
};
var filterOptions = {
    "filter_op": "OR", // optional, "OR" default
    "filters": [
        {
            "type": "range",
            "value": 50 // need to filter the distance of dicovered device, in centimeters(cm).
        }
    ]
};
dmClass.startDeviceDiscovery(info, JSON.stringify(filterOptions));

// Stop device discovery (used with startDeviceDiscovery).
dmClass.stopDeviceDiscovery(subscribeId);

// publish device discovery
var publishId = 0;
dmClass.on('publishSuccess', (data) => {
    if (data == null) {
        this.log("publishSuccess error data=null")
        return;
    }
    this.logList.push("publishSuccess:" + JSON.stringify(data));
});
dmClass.on('publishFailed', (data) => {
    this.log("publishFailed on:" + JSON.stringify(data));
});
publishId = Math.floor(Math.random() * 10000 + 1000)
var info = {
    "publishId": publishId,
    "mode": 0xAA,
    "freq": 2,
    "ranging": 1
};
dmClass.publishDeviceDiscovery(info);

// unPublish device discovery(used with publishDeviceDiscovery).
dmClass.unPublishDeviceDiscovery(publishId);

// operateAction User Operation Actions.
/*  operateAction = 0 - allow authentication
    operateAction = 1 - cancel authentication
    operateAction = 2 - user operation timeout for authentication confirm
    operateAction = 3 - cancel pincode display
    operateAction = 4 - cancel pincode input
    operateAction = 5 - confirm pincode input
*/
dmClass.setUserOperation(operation, "extra")
dmClass.on('uiStateChange', (data) => {
    console.log("uiStateChange executed, dialog closed" + JSON.stringify(data))
    var tmpStr = JSON.parse(data.param)
    this.isShow = tmpStr.verifyFailed
    console.log("uiStateChange executed, dialog closed" + this.isShow)
    if (!this.isShow) {
        this.destruction()
    }
});
dmClass.off('uiStateChange')

// Authenticate a device.
var deviceInfo ={
    "deviceId": "XXXXXXXX",
    "deviceName": "",
    deviceType: 0
};
let extraInfo = {
    "appOperation": "xxxxxxxx", // App operation. Support for user customization.
    "customDescription": "xxxxxxxx", // Custom description. Support for user customization.
}
let authParam = {
    "authType": 1,
    "extraInfo": extraInfo
}
dmClass.authenticateDevice(this.deviceInfo, authParam, (err, data) => {
    if (err) {
        this.logList.push("authenticateDevice err:" + JSON.stringify(err));
        console.info(TAG + "authenticateDevice err:" + JSON.stringify(err));
        return;
    }
    this.logList.push("authenticateDevice result:" + JSON.stringify(data));
    console.info(TAG + "authenticateDevice result:" + JSON.stringify(data));
    token = data.pinToken;
});

// Cancel device authentication.
dmClass.unAuthenticateDevice(this.deviceInfo);