ble-android-library/src/main/kotlin/network/xyo/ble/generic/gatt/peripheral/actions/XYBluetoothGattWriteDescriptor.kt
package network.xyo.ble.generic.gatt.peripheral.actions
import android.bluetooth.BluetoothGatt
import android.bluetooth.BluetoothGattCallback
import android.bluetooth.BluetoothGattDescriptor
import kotlinx.coroutines.*
import network.xyo.ble.generic.gatt.peripheral.XYBluetoothGattCallback
import network.xyo.ble.generic.gatt.peripheral.XYBluetoothResult
import network.xyo.ble.generic.gatt.peripheral.XYBluetoothResultErrorCode
import network.xyo.ble.generic.gatt.peripheral.ThreadSafeBluetoothGattWrapper
import network.xyo.ble.generic.gatt.peripheral.ble
class XYBluetoothGattWriteDescriptor(
gatt: ThreadSafeBluetoothGattWrapper,
gattCallback: XYBluetoothGattCallback,
timeout: Long = 15000L
) : XYBluetoothGattAction<ByteArray>(gatt, gattCallback, timeout) {
suspend fun start(descriptorToWrite: BluetoothGattDescriptor): XYBluetoothResult<ByteArray> {
log.info("writeDescriptor")
val listenerName = "XYBluetoothGattWriteDescriptor${hashCode()}"
var error: XYBluetoothResultErrorCode = XYBluetoothResultErrorCode.None
var value: ByteArray? = null
try {
withTimeout(timeout) {
value = suspendCancellableCoroutine { cont ->
val listener = object : BluetoothGattCallback() {
override fun onDescriptorWrite(
gatt: BluetoothGatt?,
descriptor: BluetoothGattDescriptor?,
status: Int
) {
log.info("onDescriptorWrite: $status")
super.onDescriptorWrite(gatt, descriptor, status)
// since it is always possible to have a rogue callback, make sure it is the one we are looking for
if (descriptorToWrite == descriptor) {
if (status == BluetoothGatt.GATT_SUCCESS) {
gattCallback.removeListener(listenerName)
completeStartCoroutine(cont, descriptorToWrite.value)
} else {
error = XYBluetoothResultErrorCode.DescriptorWriteFailed
gattCallback.removeListener(listenerName)
completeStartCoroutine(cont)
}
}
}
override fun onConnectionStateChange(
gatt: BluetoothGatt?,
status: Int,
newState: Int
) {
log.info("onConnectionStateChange")
super.onConnectionStateChange(gatt, status, newState)
if (newState != BluetoothGatt.STATE_CONNECTED) {
error = XYBluetoothResultErrorCode.Disconnected
gattCallback.removeListener(listenerName)
completeStartCoroutine(cont)
}
}
}
gattCallback.addListener(listenerName, listener)
ble.launch {
if (gatt.writeDescriptor(descriptorToWrite).value != true) {
error = XYBluetoothResultErrorCode.DescriptorWriteFailedToStart
gattCallback.removeListener(listenerName)
completeStartCoroutine(cont)
}
}
}
}
} catch (ex: TimeoutCancellationException) {
error = XYBluetoothResultErrorCode.Timeout
gattCallback.removeListener(listenerName)
log.error(ex)
}
return XYBluetoothResult(value, error)
}
}