feat: 출발지, 도착지가 입력되지 않았을 때, 토스트 메시지 표시

Author: DoTheBestMayB

presentation/src/main/java/com/stop/model/ErrorType.kt

@@ -0,0 +1,5 @@
+package com.stop.model
+
+enum class ErrorType {
+    NO_START, NO_END,
+}

presentation/src/main/java/com/stop/ui/route/RouteFragment.kt

@@ -5,9 +5,12 @@ import androidx.fragment.app.Fragment
 import android.view.LayoutInflater
 import android.view.View
 import android.view.ViewGroup
+import android.widget.Toast
 import androidx.fragment.app.viewModels
+import com.stop.R
 import com.stop.databinding.FragmentRouteBinding
 import com.stop.domain.model.route.tmap.custom.Itinerary
+import com.stop.model.ErrorType
 import com.stop.model.route.Coordinate
 import com.stop.model.route.Place
 import dagger.hilt.android.AndroidEntryPoint
@@ -66,6 +69,17 @@ class RouteFragment : Fragment() {
             }
             adapter.submitList(it)
         }
+
+        viewModel.errorMessage.observe(viewLifecycleOwner) {
+            it.getContentIfNotHandled()?.let { errorType ->
+                val message = when(errorType) {
+                    ErrorType.NO_START -> getString(R.string.no_start_input)
+                    ErrorType.NO_END -> getString(R.string.no_end_input)
+                }
+
+                Toast.makeText(requireContext(), message, Toast.LENGTH_SHORT).show()
+            }
+        }
     }
 
     private fun setStartAndDestinationText() {

presentation/src/main/java/com/stop/ui/route/RouteViewModel.kt

@@ -9,6 +9,8 @@ import com.stop.domain.model.route.tmap.RouteRequest
 import com.stop.domain.model.route.tmap.custom.Itinerary
 import com.stop.domain.usecase.route.GetLastTransportTimeUseCase
 import com.stop.domain.usecase.route.GetRouteUseCase
+import com.stop.model.ErrorType
+import com.stop.model.Event
 import com.stop.model.route.Place
 import dagger.hilt.android.lifecycle.HiltViewModel
 import kotlinx.coroutines.Dispatchers
@@ -19,7 +21,7 @@ import javax.inject.Inject
 class RouteViewModel @Inject constructor(
     private val getRouteUseCase: GetRouteUseCase,
     private val getLastTransportTimeUseCase: GetLastTransportTimeUseCase,
-): ViewModel() {
+) : ViewModel() {
 
     private val _origin = MutableLiveData<Place>()
     val origin: LiveData<Place>
@@ -37,9 +39,20 @@ class RouteViewModel @Inject constructor(
     val lastTimeResponse: LiveData<TransportLastTimeInfo>
         get() = _lastTimeResponse
 
+    private val _errorMessage = MutableLiveData<Event<ErrorType>>()
+    val errorMessage: LiveData<Event<ErrorType>>
+        get() = _errorMessage
+
     fun getRoute() {
-        val originValue = _origin.value ?: return
-        val destinationValue = _destination.value ?: return
+        val originValue = _origin.value ?: let {
+            _errorMessage.value = Event(ErrorType.NO_START)
+            return
+        }
+
+        val destinationValue = _destination.value ?: let {
+            _errorMessage.value = Event(ErrorType.NO_END)
+            return
+        }
 
         val routeRequest = RouteRequest(
             startX = originValue.coordinate.longitude,
@@ -55,7 +68,8 @@ class RouteViewModel @Inject constructor(
 
     fun calculateLastTransportTime(itinerary: Itinerary) {
         viewModelScope.launch(Dispatchers.IO) {
-            val lastTimeInfo = getLastTransportTimeUseCase.getLastTransportTime(itinerary) ?: return@launch
+            val lastTimeInfo =
+                getLastTransportTimeUseCase.getLastTransportTime(itinerary) ?: return@launch
 
             _lastTimeResponse.postValue(lastTimeInfo)
         }

presentation/src/main/res/values/strings.xml

@@ -29,4 +29,6 @@
     <string name="quit">종료</string>
     <string name="minus">-</string>
     <string name="plus">+</string>
+    <string name="no_start_input">출발지가 입력되지 않았습니다.</string>
+    <string name="no_end_input">도착지가 입력되지 않았습니다.</string>
 </resources>