Made it so the ready button doesn't turn gray when the heart rate is unavailable

Author: Yuval-Roth

watch/app/src/main/java/com/imsproject/watch/view/MainActivity.kt

@@ -516,11 +516,12 @@ class MainActivity : ComponentActivity() {
                 )
             }
             Button(
-                colors = if(hrSensorReady) ButtonDefaults.primaryButtonColors()
-                else ButtonDefaults.buttonColors(
-                    backgroundColor = Color(0xFF707070).copy(alpha=0.5f),
-                    contentColor = Color.White
-                ),
+                colors = if (!hrSensorReady && !viewModel.heartRateUnavailable.collectAsState().value)
+                    ButtonDefaults.buttonColors(
+                        backgroundColor = Color(0xFF707070).copy(alpha=0.5f),
+                        contentColor = Color.White
+                    )
+                else ButtonDefaults.primaryButtonColors(),
                 onClick = { onReady() },
                 modifier = Modifier
                     .fillMaxWidth(0.55f)

watch/app/src/main/java/com/imsproject/watch/viewmodel/MainViewModel.kt

@@ -111,6 +111,9 @@ class MainViewModel() : ViewModel() {
     private val _expId = MutableStateFlow<String?>(null)
     val expId : StateFlow<String?> = _expId
 
+    private val _heartRateUnavailable = MutableStateFlow(false)
+    val heartRateUnavailable: StateFlow<Boolean> = _heartRateUnavailable
+
     private var _skipFeedback = false
     private var _sessionId = -1
     var temporaryPlayerId = ""
@@ -128,6 +131,7 @@ class MainViewModel() : ViewModel() {
                 viewModelScope.launch(Dispatchers.Main) {
                     Toast.makeText(context, "Heart rate unavailable", Toast.LENGTH_LONG).show()
                 }
+                _heartRateUnavailable.value = true
             }
         }
         locationSensorsHandler.init(context)