Hướng dẫn về thiết bị máy ảnh cho Android

// Get device basic information. All general information traits are on the RootNodeDevice type.
    device.type(RootNodeDevice).first().standardTraits.basicInformation?.let { basicInformation ->
        println("vendorName ${basicInformation.vendorName}")
        println("vendorId ${basicInformation.vendorId}")
        println("productId ${basicInformation.productId}")
        println("productName ${basicInformation.productName}")
        println("softwareVersion ${basicInformation.softwareVersion}")
    }

val basicInfo: ExtendedBasicInformation = device.getTrait(ExtendedBasicInformation)
val serialNumber = basicInfo.getSerialNumber().serialNumber

fun getLastContactTimeStamp(trait: ExtendedGeneralDiagnostics): java.time.Instant {
  val timestamp = trait.lastContactTimestamp
  return Instant.ofEpochSecond(timestamp.toLong())
}

// Get the Mount trait
val mountTrait: Mount = device.getTrait(Mount)

// Read the current mount state and detection type
val mountState = mountTrait.mountState
val mountDetectionType = mountTrait.mountDetectionType

// Read the current mount type name
val mountTypeName = mountTrait.mountTypeName

// Update the mount type override
mountTrait.update {
  setMountTypeOverride(MountTrait.MountTypeOverrideEnum.Official)
}

val cameraConnectivity = cameraDevice.metadata.sourceConnectivity.connectivityState

val ipAddresses =
  trait.networkInterfaces?.flatMap { networkInterface ->
    (networkInterface.ipv4Addresses + networkInterface.ipv6Addresses).mapNotNull { bytes ->
      try {
        java.net.InetAddress.getByAddress(bytes).hostAddress
      } catch (e: java.net.UnknownHostException) {
        null
      }
    }
  } ?: emptyList()

suspend fun getWebRtcLiveViewTrait(cameraDevice: HomeDevice) {
 return cameraDevice.type(GoogleCameraDevice).trait(WebRtcLiveView).first {
    it?.metadata?.sourceConnectivity?.connectivityState == ConnectivityState.ONLINE
  }

}

// Start the live view
suspend fun startCameraStream(trait: WebRtcLiveView, offerSdp: String) {
  val response = trait.startLiveView(offerSdp)
  // Response contains three fields (see below)
  return response
}
  ...

// This is used to manage the WebRTC connection
val peerConnection: RTCPeerConnection = ...

   ...

val startResponse = startCameraStream(sdp)
val answerSdp = startResponse?.answerSdp
val sessionDuration = startResponse?.liveSessionDurationSeconds
val mediaSessionId = startResponse?.mediaSessionId

peerConnection.setRemoteDescription(SessionDescription.Type.ANSWER,
                                    answerSdp)

// Assuming camera stream has just been started
suspend fun scheduleExtension(trait: WebRtcLiveView, mediaSessionId: String, liveSessionDurationSeconds: UShort ) {
  delay(liveSessionDurationSeconds - BUFFER_SECONDS * 1000)
  val response = trait.extendLiveView(mediaSessionId)
  // returns how long the session will be live for
  return response.liveSessionDurationSeconds
}

// Make sure camera stream is on
suspend fun setTalkback(isOn: Boolean, trait: WebRtcLiveView, mediaSessionId: String) {
  if(isOn) {
    trait.startTalkback(mediaSessionId)
  } else {
    trait.stopTalkback(mediaSessionId)
  }
}

// Assuming you have a HomeDevice instance 'device'
val availableQualityHints: StateFlow<List> =
    device.type(GoogleCameraDevice)
        .trait(WebRtcLiveView)
        .map { trait -> 
            trait?.supportedQualityHints ?: emptyList() 
        }
        .stateIn(viewModelScope, SharingStarted.WhileSubscribed(), emptyList())

// Assuming you have a HomeDevice instance 'device'
suspend fun changeQuality(mediaSessionId: String, qualityHint: QualityHint) {
    // Get the trait from the device
    val trait = device.type(GoogleCameraDevice).trait(WebRtcLiveView).first() ?: return
    try {
        trait.changeLiveViewQuality(mediaSessionId, qualityHint)
    } catch (e: Exception) {
        // Handle error
    }
}

// Start or stop recording for all connections.
suspend fun setCameraRecording(trait: PushAvStreamTransport, isOn: Boolean) {
  if(isOn) {
    trait.setTransportStatus(TransportStatusEnum.Active)
  } else {
    trait.setTransportStatus(TransportStatusEnum.Inactive)
  }
}

// Get the on/off state
suspend fun onOffState(pushAvStreamTransport: PushAvStreamTransport) {
  return pushAvStreamTransport
    .currentConnections?.any { it.transportStatus == TransportStatusEnum.Active } ?: false
}

// Check if the camera's recording capability is enabled
fun PushAvStreamTransport.recordModeActive(): Boolean {
  return currentConnections?.any { it.transportStatus == TransportStatusEnum.Active } ?: false
}

// Fetch the current connections
suspend fun queryRecordModeState(trait: PushAvStreamTransport) {
  return trait.findTransport().let {
      it.transportConfigurations.any { it.transportStatus == TransportStatusEnum.Active
    }
}

// Get a flow of the CameraSnapshot trait
val cameraSnapshotFlow: Flow<CameraSnapshot?> = cameraDevice
  .type(GoogleCameraDevice)
  .trait(CameraSnapshot)

// Get the current trait state
val cameraSnapshot = cameraSnapshotFlow.firstOrNull()
if (cameraSnapshot != null) {
  val previewImageUrl = cameraSnapshot.previewImageUrl
  // Load the preview image from the URL
} else {
  // CameraSnapshot trait not supported on this device
}

try {
  val response = cameraSnapshot.getLiveSnapshot()
  val snapshotUrl = response.snapshotUrl
  // Load the live snapshot image from the URL
} catch (e: Exception) {
  Log.e("CameraSnapshot", "Failed to get live snapshot: ${e.message}")
}

import android.graphics.Bitmap
import android.graphics.BitmapFactory
import java.io.IOException
import java.net.HttpURLConnection
import java.net.URL
import kotlinx.coroutines.Dispatchers
import kotlinx.coroutines.withContext

/**
 * Downloads a snapshot from a URL using an OAuth access token.
 */
suspend fun loadSnapshotImage(urlString: String, oauthToken: String): Bitmap? =
  withContext(Dispatchers.IO) {
    var connection: HttpURLConnection? = null
    try {
      val url = URL(urlString)
      connection = url.openConnection() as HttpURLConnection
      // 1. Configure the HTTP GET request with the Bearer token
      connection.setRequestProperty("Authorization", "Bearer $oauthToken")

      // 2. Fetch the image data
      if (connection.responseCode == HttpURLConnection.HTTP_OK) {
        connection.inputStream.use { inputStream ->
          BitmapFactory.decodeStream(inputStream)
        }
      } else {
        null
      }
    } catch (e: IOException) {
      e.printStackTrace()
      null
    } finally {
      connection?.disconnect()
    }
  }

// Example energyBalances list
energy_balances: [
  {
    step: 0,
    label: "EXTENDED"
  },
  {
    step: 50,
    label: "BALANCED"
  },
  {
    step: 100,
    label: "PERFORMANCE"
  }
]

// The index parameter must be within the UByte range (0-255).
suspend fun setEnergyBalance(trait: EnergyPreference, index: Int) {
  trait.update { setCurrentEnergyBalance(index.toUByte()) }
}

// Setting the battery usage to more recording ie performance
setEnergyBalance(energyPreference, 2)

suspend fun setAutomaticBatterySaver(enable: Boolean, trait: EnergyPreference) {
  // 0 is Disabled, 1 is Enabled
  val value = if (enable) 1.toUByte() else 0.toUByte()
  trait.update { setCurrentLowPowerModeSensitivity(value) }
}

// Get the battery charging state
val batteryChargeState = powerSource.batChargeState

when (batteryChargeState) {
    PowerSourceTrait.BatChargeStateEnum.IsCharging -> "Charging"
    PowerSourceTrait.BatChargeStateEnum.IsAtFullCharge -> "Full"
    PowerSourceTrait.BatChargeStateEnum.IsNotCharging -> "Not Charging"
    else -> "Unknown"
}

// Get the battery charge level
val batteryLevel = powerSourceTrait.batChargeLevel

when (batteryLevel) {
    PowerSourceTrait.BatChargeLevelEnum.OK -> "OK"
    PowerSourceTrait.BatChargeLevelEnum.Warning -> "Warning"
    PowerSourceTrait.BatChargeLevelEnum.Critical -> "Critical"
    else -> "Unknown"
}

  val trait: PowerSource
  val isWired = trait.wiredPresent
  val hasBattery = trait.batPresent

// Get the battery replacement status
val batteryStatus = powerSourceTrait.batReplacementNeeded

if (batteryStatus) {
  println("Replace the battery.")
}

// Turn the device's microphone on or off
suspend fun turnOffMicrophone(disableMicrophone: Boolean, trait: CameraAvStreamManagement) {
  trait.update { setMicrophoneMuted(disableMicrophone) }
}

// Turn audio recording on or off for the device
suspend fun turnOffAudioRecording(disableAudioRecording: Boolean, trait: CameraAvStreamManagement) {
  trait.update { setRecordingMicrophoneMuted(disableAudioRecording) }
}

// Adjust the camera speaker volume
suspend fun adjustSpeakerVolume(volume: Int, trait: CameraAvStreamManagement) {
  trait.update { setSpeakerVolumeLevel(volume.toUbyte()) }
}

// 1. Obtain the trait flow from the device
private val zoneManagementFlow: Flow =
  device.type(CAMERA_TYPE).flatMapLatest { it.trait(ZoneManagement) }

// 2. Map the flow to the list of zone structures
val activityZones: Flow<List<ZoneManagementTrait.ZoneInformationStruct>> =
  zoneManagementFlow.map { trait ->
    trait.zones ?: emptyList()
  }

import com.google.home.google.ZoneManagement
import com.google.home.google.ZoneManagementTrait
import com.google.home.matter.serialization.OptionalValue

/**
 * Creates a custom activity zone named "Front Porch" with a salmon color
 * configured for motion detection.
 */
suspend fun createFrontPorchZone(zoneManagement: ZoneManagement) {
  // 1. Define the vertices for the zone (2D Cartesian coordinates)
  // Values are typically scaled to a maximum defined by the device's twoDCartesianMax attribute.
  val vertices =
    listOf(
      ZoneManagementTrait.TwoDCartesianVertexStruct(x = 260u, y = 422u),
      ZoneManagementTrait.TwoDCartesianVertexStruct(x = 1049u, y = 0u),
      ZoneManagementTrait.TwoDCartesianVertexStruct(x = 2048u, y = 0u),
      ZoneManagementTrait.TwoDCartesianVertexStruct(x = 2048u, y = 950u),
      ZoneManagementTrait.TwoDCartesianVertexStruct(x = 1630u, y = 1349u),
      ZoneManagementTrait.TwoDCartesianVertexStruct(x = 880u, y = 2048u),
      ZoneManagementTrait.TwoDCartesianVertexStruct(x = 0u, y = 2048u),
      ZoneManagementTrait.TwoDCartesianVertexStruct(x = 638u, y = 1090u)
    )

  // 2. Define the zone structure
  val newZone =
    ZoneManagementTrait.TwoDCartesianZoneStruct(
      name = "Front Porch",
      vertices = vertices,
      // Usage defines what the zone filters (for example, Motion, Person, Vehicle)
      use = listOf(ZoneManagementTrait.ZoneUseEnum.Motion),
      // Color is typically a hex string (for example, Salmon/Pink)
      color = OptionalValue.present("#F439A0")
    )

  try {
    // 3. Execute the command to add the zone to the device
    zoneManagement.createTwoDCartesianZone(newZone)
    println("Successfully created activity zone.")
  } catch (e: Exception) {
    // Handle potential HomeException or Timeout
    println("Failed to create activity zone: ${e.message}")
  }
}

private suspend fun ZoneManagement.updateZone(
  zoneId: UShort,
  zone: ZoneManagementTrait.TwoDCartesianZoneStruct
) {
  // Execute the command to update the zone
  this.updateTwoDCartesianZone(zoneId = zoneId, zone = zone)
}

private suspend fun ZoneManagement.deleteZone(zoneId: UShort) {
  // Execute the command to remove the zone
  this.removeZone(zoneId = zoneId)
}

// Example structure to store the
data class EventTriggerAttribute(val type: EventTriggerTypeEnum, val enabled: Boolean)

// 1. Obtain the trait flow from the device
private val avStreamAnalysisFlow: Flow<AvStreamAnalysis> =
  device.traitFromType(AvStreamAnalysis, CAMERA_TYPES.first { device.has(it) })

// 2. Map the flow to a list of sound event attributes
val soundEventTriggersState: Flow<List<EventTriggerAttribute>> =
  avStreamAnalysisFlow.map { trait ->
    // Get raw lists from the trait attributes
    val supported = trait.supportedEventTriggers ?: emptyList()
    val enabled = trait.enabledEventTriggers ?: emptyList()

    // Define sound-specific triggers to filter for
    val soundTypes = setOf(
      EventTriggerTypeEnum.Sound,
      EventTriggerTypeEnum.PersonTalking,
      EventTriggerTypeEnum.DogBark,
      EventTriggerTypeEnum.GlassBreak,
      EventTriggerTypeEnum.SmokeAlarm,
      EventTriggerTypeEnum.CoAlarm,
    )

    // Filter and associate status
    supported
      .filter { soundTypes.contains(it) }
      .map { type ->
        EventTriggerAttribute(
          type = type,
          enabled = enabled.contains(type)
        )
      }
  }

private suspend fun AvStreamAnalysis.updateEventTriggers(
  eventTriggers: List<EventTriggerAttribute>
) {
  val toUpdate = eventTriggers.map {
    EventTriggerEnablement(
      eventTriggerType = it.type,
      enablementStatus = if (it.enabled) {
        EnablementStatusEnum.Enabled
      } else {
        EnablementStatusEnum.Disabled
      },
    )
  }

  // Execute the command on the device
  setOrUpdateEventDetectionTriggers(toUpdate)
}

// 1. Obtain the trait flow from the device
private val recordingModeTraitFlow: Flow =
    device.traitFromType(RecordingMode, CAMERA_TYPES.first { device.has(it) })

// 2. Map the flow to recording mode options
data class RecordingModeOptions(
    val recordingMode: RecordingModeTrait.RecordingModeEnum,
    val index: Int,
    val available: Boolean,
    val readableString: String,
)

private val recordingModeOptions: Flow<List> =
    recordingModeTraitFlow.map { trait ->
        val supported = trait.supportedRecordingModes?.map { it.recordingMode } ?: emptyList()
        val available = trait.availableRecordingModes?.map { it.toInt() } ?: emptyList()

        supported.withIndex().map { (index, mode) ->
            RecordingModeOptions(
                recordingMode = mode,
                index = index,
                available = available.contains(index),
                readableString = mode.toReadableString(),
            )
        }
    }

private suspend fun RecordingMode.updateRecordingMode(index: Int) {
    // Execute the command to update the selected mode
    this.setSelectedRecordingMode(index.toUByte())
}

// Change the camera's image orientation
val isRotated = false

cameraAvStreamManagement.update { setImageRotation(if (isRotated) 180.toUShort() else 0.toUShort()) }

// Turn night vision on
cameraAvStreamManagement.update {
  setNightVision(CameraAvStreamManagementTrait.TriStateAutoEnum.On)
}

// Turn night vision off
CameraAvStreamManagement.update {
  setNightVision(CameraAvStreamManagementTrait.TriStateAutoEnum.Off)
}

// Set the LED brightness to high
cameraAvStreamManagement.update {
  setStatusLightBrightness(CameraAvStreamManagementTrait.ThreeLevelAutoEnum.High)
}

// Set the LED brightness to low
cameraAvStreamManagement.update {
  setStatusLightBrightness(CameraAvStreamManagementTrait.ThreeLevelAutoEnum.Low)
}

(x1,y1) -- (x2,y1)
   |          |
(x1,y2) -- (x2,y2)

cameraAvStreamManagement
  .update { setViewport(
    CameraAvStreamManagementTrait.ViewportStruct(
      x1 = horizontalRange.rangeStart.roundToInt().toUShort(),
      x2 = horizontalRange.rangeEnd.roundToInt().toUShort(),
      y1 = verticalRange.rangeStart.roundToInt().toUShort(),
      y2 = verticalRange.rangeEnd.roundToInt().toUShort(),
    )
) }

// Enable analytics
extendedGeneralDiagnostics.update {
  setAnalyticsEnabled(true)
}

// Disable analytics
extendedGeneralDiagnostics.update {
  setAnalyticsEnabled(false)
}

val trait: PushAvStreamTransport = device.getTrait(PushAvStreamTransport)
val connections = trait.findTransport().transportConfigurations

// Locate the connection designated for recording
val recordingConnection = connections.firstOrNull {
    it.transportOptions.getOrNull()?.streamUsage == StreamUsageEnum.Recording
}

val options = recordingConnection?.transportOptions?.getOrNull()

// 1. Bandwidth Quality (Video Stream ID)
val videoStreamId = options?.videoStreamId?.getOrNull()

// 2. Wake-up Sensitivity (Motion Sensitivity)
val wakeUpSensitivity = options?.triggerOptions?.motionSensitivity?.getOrNull()

// 3. Max Event Length (Motion Trigger Time Control)
val maxEventLength = options?.triggerOptions?.motionTimeControl?.getOrNull()?.maxDuration

val toUpdate = TransportOptionsStruct(
    videoStreamId = OptionalValue.present(2u), // e.g., Max Quality
    triggerOptions = TransportTriggerOptionsStruct(
        motionSensitivity = OptionalValue.present(5u), // e.g., Medium
        motionTimeControl = OptionalValue.present(
            TransportMotionTriggerTimeControlStruct(maxDuration = 30u)
        )
    )
)

if (recordingConnection != null) {
    trait.modifyPushTransport(
        connectionId = recordingConnection.connectionId,
        transportOptions = toUpdate
    )
}