feat: 읽을 수 없는 쪽지 삭제

* refactor: 쪽지 폴링 로직 수정

* style: 코드 정리

* feat: 주변 쪽지를 모두 읽을 수 있는 쪽지로 변경

* feat: 변수명 변경

* feat: 사용하지 않는 drawable 삭제

* feat: 오타 수정

Author: briandr97

android/app/src/main/java/com/now/naaga/presentation/onadventure/NaverMapSettingDelegate.kt

@@ -130,25 +130,15 @@ class DefaultNaverMapSettingDelegate() : NaverMapSettingDelegate, DefaultLifecyc
     override fun addLetter(letter: LetterPreview, action: (id: Long) -> Unit) {
         Marker().apply {
             position = LatLng(letter.coordinate.latitude, letter.coordinate.longitude)
-            icon = selectLetterIcon(letter.isNearBy)
-            if (letter.isNearBy) {
-                setOnSingleClickListener {
-                    action(letter.id)
-                }
+            icon = OverlayImage.fromResource(R.drawable.ic_letter)
+            setOnSingleClickListener {
+                action(letter.id)
             }
             map = naverMap
             letterMarkers.add(this)
         }
     }
 
-    private fun selectLetterIcon(isNearBy: Boolean): OverlayImage {
-        return if (isNearBy) {
-            OverlayImage.fromResource(R.drawable.ic_letter)
-        } else {
-            OverlayImage.fromResource(R.drawable.ic_letter_preview)
-        }
-    }
-
     override fun removeLetters() {
         letterMarkers.forEach { letterMarker ->
             letterMarker.map = null

android/app/src/main/java/com/now/naaga/presentation/onadventure/OnAdventureActivity.kt

@@ -110,6 +110,7 @@ class OnAdventureActivity :
     private fun subscribe() {
         viewModel.startCoordinate.observe(this) {
             beginAdventure(it)
+            viewModel.fetchLetters()
         }
         viewModel.adventure.observe(this) {
             isAdventureDone(it.adventureStatus)
@@ -125,11 +126,11 @@ class OnAdventureActivity :
         viewModel.isSendLetterSuccess.observe(this) {
             supportFragmentManager.findFragmentByTag(LetterSendDialog.TAG)?.onDestroyView()
             when (it) {
-                true -> { binding.root.showSnackbar(getString(R.string.OnAdventure_send_letter_success)) }
-                false -> { binding.root.showSnackbar(getString(R.string.OnAdventure_send_letter_fail)) }
+                true -> binding.root.showSnackbar(getString(R.string.OnAdventure_send_letter_success))
+                false -> binding.root.showSnackbar(getString(R.string.OnAdventure_send_letter_fail))
             }
         }
-        viewModel.letters.observe(this) {
+        viewModel.nearbyLetters.observe(this) {
             drawLetters(it)
         }
         viewModel.letter.observe(this) {
@@ -149,8 +150,7 @@ class OnAdventureActivity :
                 }
 
                 OnAdventureViewModel.TRY_COUNT_OVER -> showToast(getString(R.string.onAdventure_try_count_over))
-
-                DataThrowable.NETWORK_THROWABLE_CODE -> { showToast(getString(R.string.network_error_message)) }
+                DataThrowable.NETWORK_THROWABLE_CODE -> showToast(getString(R.string.network_error_message))
 
                 else -> shortSnackbar(throwable.message ?: return@observe)
             }

android/app/src/main/java/com/now/naaga/presentation/onadventure/OnAdventureViewModel.kt

@@ -3,7 +3,6 @@ package com.now.naaga.presentation.onadventure
 import androidx.lifecycle.LiveData
 import androidx.lifecycle.MutableLiveData
 import androidx.lifecycle.ViewModel
-import androidx.lifecycle.liveData
 import androidx.lifecycle.map
 import androidx.lifecycle.viewModelScope
 import com.now.domain.model.Adventure
@@ -47,19 +46,8 @@ class OnAdventureViewModel @Inject constructor(
     private val _lastHint = MutableLiveData<Hint>()
     val lastHint: LiveData<Hint> = _lastHint
 
-    val letters: LiveData<List<LetterPreview>> = liveData {
-        while (true) {
-            myCoordinate.value?.let { coordinate ->
-                emit(
-                    letterRepository.fetchNearbyLetters(
-                        latitude = coordinate.latitude,
-                        longitude = coordinate.longitude,
-                    ).map { it.copy(isNearBy = coordinate.isNearBy(it.coordinate)) },
-                )
-            } ?: emit(emptyList())
-            delay(5000)
-        }
-    }
+    private val _nearbyLetters = MutableLiveData<List<LetterPreview>>()
+    val nearbyLetters: LiveData<List<LetterPreview>> = _nearbyLetters
 
     private val _letter = MutableLiveData<LetterUiModel>()
     val letter: LiveData<LetterUiModel> = _letter
@@ -102,6 +90,22 @@ class OnAdventureViewModel @Inject constructor(
         }
     }
 
+    fun fetchLetters() {
+        viewModelScope.launch {
+            while (true) {
+                val coordinate = requireNotNull(myCoordinate.value) { "나의 좌표가 null 입니다." }
+                runCatching {
+                    letterRepository.fetchNearbyLetters(coordinate.latitude, coordinate.longitude)
+                }.onSuccess {
+                    _nearbyLetters.value = it
+                }.onFailure {
+                    setThrowable(it)
+                }
+                delay(5000L)
+            }
+        }
+    }
+
     fun openHint() {
         if (isAllHintsUsed()) {
             setThrowable(hintThrowable)
@@ -148,11 +152,13 @@ class OnAdventureViewModel @Inject constructor(
                 _adventure.value = adventure.value?.copy(adventureStatus = AdventureStatus.DONE)
                 _throwable.value = throwable
             }
+
             NOT_ARRIVED -> {
                 val currentRemainingTryCount = adventure.value?.remainingTryCount ?: return
                 _adventure.value = adventure.value?.copy(remainingTryCount = currentRemainingTryCount - 1)
                 _throwable.value = throwable
             }
+
             else -> {
                 _throwable.value = throwable
             }

android/app/src/main/res/drawable/ic_letter_preview.xml

@@ -20,4 +20,4 @@ tasks {
     test {
         useJUnitPlatform()
     }
-}
+}