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import 'package:flutter_ics_homescreen/export.dart';
import 'package:protos/radio_api.dart' as api;
class RadioClient {
final RadioConfig config;
final Ref ref;
late api.ClientChannel channel;
late api.RadioClient stub;
RadioClient({required this.config, required this.ref}) {
debugPrint(
"Connecting to radio service at ${config.hostname}:${config.port}");
api.ChannelCredentials creds = const api.ChannelCredentials.insecure();
channel = api.ClientChannel(config.hostname,
port: config.port, options: api.ChannelOptions(credentials: creds));
stub = api.RadioClient(channel);
}
void run() async {
getBandParameters();
try {
var responseStream = stub.getStatusEvents(api.StatusRequest());
await for (var event in responseStream) {
handleStatusEvent(event);
}
} catch (e) {
print(e);
}
}
void getBandParameters() async {
try {
var response = await stub.getBandParameters(
api.GetBandParametersRequest(band: api.Band.BAND_FM));
ref.read(radioStateProvider.notifier).updateBandParameters(
freqMin: response.min,
freqMax: response.max,
freqStep: response.step);
// Get initial frequency
var freqResponse = await stub.getFrequency(api.GetFrequencyRequest());
ref
.read(radioStateProvider.notifier)
.updateFrequency(freqResponse.frequency);
} catch (e) {
print(e);
}
}
void handleStatusEvent(api.StatusResponse response) {
switch (response.whichStatus()) {
case api.StatusResponse_Status.frequency:
var status = response.frequency;
ref.read(radioStateProvider.notifier).updateFrequency(status.frequency);
break;
case api.StatusResponse_Status.play:
var status = response.play;
ref.read(radioStateProvider.notifier).updatePlaying(status.playing);
break;
case api.StatusResponse_Status.scan:
var status = response.scan;
if (status.stationFound) {
ref.read(radioStateProvider.notifier).updateScanning(false);
}
break;
default:
break;
}
}
void start() async {
try {
await stub.start(api.StartRequest());
} catch (e) {
print(e);
}
}
void stop() async {
try {
await stub.stop(api.StopRequest());
} catch (e) {
print(e);
}
}
void setFrequency(int frequency) async {
var radioState = ref.read(radioStateProvider);
if ((frequency < radioState.freqMin) ||
(frequency > radioState.freqMax) ||
((frequency - radioState.freqMin) % radioState.freqStep) != 0) {
debugPrint("setFrequency: invalid frequency $frequency!");
return;
}
try {
await stub
.setFrequency(api.SetFrequencyRequest(frequency: frequency));
} catch (e) {
print(e);
}
}
void tuneForward() async {
var radioState = ref.read(radioStateProvider);
if (radioState.freqCurrent < radioState.freqMax) {
int frequency = radioState.freqCurrent + radioState.freqStep;
if (frequency > radioState.freqMax) {
frequency = radioState.freqMax;
}
try {
await stub
.setFrequency(api.SetFrequencyRequest(frequency: frequency));
} catch (e) {
print(e);
}
}
}
void tuneBackward() async {
var radioState = ref.read(radioStateProvider);
if (radioState.freqCurrent > radioState.freqMin) {
int frequency = radioState.freqCurrent - radioState.freqStep;
if (frequency < radioState.freqMin) {
frequency = radioState.freqMin;
}
try {
await stub
.setFrequency(api.SetFrequencyRequest(frequency: frequency));
} catch (e) {
print(e);
}
}
}
void scanForward() async {
try {
await stub.scanStart(api.ScanStartRequest(
direction: api.ScanDirection.SCAN_DIRECTION_FORWARD));
} catch (e) {
print(e);
}
}
void scanBackward() async {
try {
await stub.scanStart(api.ScanStartRequest(
direction: api.ScanDirection.SCAN_DIRECTION_BACKWARD));
} catch (e) {
print(e);
}
}
void scanStop() async {
try {
await stub.scanStop(api.ScanStopRequest());
} catch (e) {
print(e);
}
}
}
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