add phone control service

Author: crc-32

src/commonMain/kotlin/io/rebble/libpebblecommon/services/PhoneControlService.kt

@@ -0,0 +1,28 @@
+package io.rebble.libpebblecommon.services
+
+import io.rebble.libpebblecommon.ProtocolHandler
+import io.rebble.libpebblecommon.packets.PhoneControl
+import io.rebble.libpebblecommon.protocolhelpers.PebblePacket
+import io.rebble.libpebblecommon.protocolhelpers.ProtocolEndpoint
+import kotlinx.coroutines.channels.Channel
+
+class PhoneControlService(private val protocolHandler: ProtocolHandler) : ProtocolService {
+    val receivedMessages = Channel<PhoneControl>(Channel.BUFFERED)
+
+    init {
+        protocolHandler.registerReceiveCallback(ProtocolEndpoint.PHONE_CONTROL, this::receive)
+    }
+
+    suspend fun send(packet: PhoneControl) {
+        protocolHandler.send(packet)
+    }
+
+    fun receive(packet: PebblePacket) {
+        if (packet !is PhoneControl) {
+            throw IllegalStateException("Received invalid packet type: $packet")
+        }
+
+        receivedMessages.trySend(packet)
+    }
+
+}