[Feat] 다국어 지원

app/src/main/AndroidManifest.xml

@@ -134,6 +134,9 @@
         <activity
             android:name=".presentation.mypage.terms.WebViewActivity"
             android:exported="false" />
+        <activity
+            android:name=".presentation.mypage.language.LanguageSelectorActivity"
+            android:exported="false" />
         <activity
                 android:name=".presentation.intro.IntroActivity"
             android:exported="true">

app/src/main/java/com/eatssu/android/alarm/EatSsuFirebaseMessagingService.kt

@@ -34,10 +34,10 @@ class EatSsuFirebaseMessagingService : FirebaseMessagingService() {
 
         val channel = NotificationChannel(
             CHANNEL_ID,
-            "서버가 보낸 알림",
+            getString(R.string.notification_channel_server_name),
             NotificationManager.IMPORTANCE_HIGH
         ).apply {
-            description = "잇슈 서버가 보낸 알림을 표시합니다."
+            description = getString(R.string.notification_channel_server_description)
             enableLights(true)
             enableVibration(true)  // 진동도 활성화
             lockscreenVisibility = NotificationCompat.VISIBILITY_PUBLIC // 잠금 화면에서도 표시

app/src/main/java/com/eatssu/android/alarm/NotificationReceiver.kt

@@ -28,10 +28,10 @@ class NotificationReceiver : BroadcastReceiver() {
 
         val channel = NotificationChannel(
             CHANNEL_ID,
-            "점심시간 전 알림",
+            context.getString(R.string.notification_channel_lunch_name),
             NotificationManager.IMPORTANCE_HIGH // 중요도를 높게 설정
         ).apply {
-            description = "점심시간 전, 푸시알림을 발송합니다."
+            description = context.getString(R.string.notification_channel_lunch_description)
             enableLights(true)
             enableVibration(true)  // 진동도 활성화
             lockscreenVisibility = NotificationCompat.VISIBILITY_PUBLIC // 잠금 화면에서도 표시

app/src/main/java/com/eatssu/android/data/local/SettingDataStore.kt

@@ -5,7 +5,9 @@ import androidx.datastore.core.DataStore
 import androidx.datastore.preferences.core.Preferences
 import androidx.datastore.preferences.core.booleanPreferencesKey
 import androidx.datastore.preferences.core.edit
+import androidx.datastore.preferences.core.stringPreferencesKey
 import androidx.datastore.preferences.preferencesDataStore
+import com.eatssu.android.domain.model.AppLanguage
 import dagger.hilt.android.qualifiers.ApplicationContext
 import kotlinx.coroutines.flow.Flow
 import kotlinx.coroutines.flow.map
@@ -19,6 +21,7 @@ class SettingDataStore @Inject constructor(
 
     companion object {
         private val DAILY_NOTIFICATION_KEY = booleanPreferencesKey("daily_notification")
+        private val LANGUAGE_KEY = stringPreferencesKey("app_language")
     }
 
     val dailyNotificationStatus: Flow<Boolean> = context.settingDataStore.data
@@ -32,5 +35,17 @@ class SettingDataStore @Inject constructor(
         }
     }
 
+    val appLanguage: Flow<AppLanguage> = context.settingDataStore.data
+        .map { preferences ->
+            val code = preferences[LANGUAGE_KEY] ?: ""
+            AppLanguage.fromCode(code)
+        }
+
+    suspend fun setAppLanguage(language: AppLanguage) {
+        context.settingDataStore.edit { preferences ->
+            preferences[LANGUAGE_KEY] = language.code
+        }
+    }
+
     suspend fun clear() = context.settingDataStore.edit { it.clear() }
 }

app/src/main/java/com/eatssu/android/data/remote/dto/response/CollegeResponse.kt

@@ -10,7 +10,9 @@ data class CollegeResponse(
     val collegeName: String?
 )
 
-fun CollegeResponse.toDomain() = College(
-    collegeId = this.collegeId ?: -1,
-    collegeName = this.collegeName ?: "단과대",
-)
+// 이 함수가 null을 반환하는 경우, 이 함수를 호출하는 UserRepositoryImpl에서 mapNotNull로 걸러짐
+fun CollegeResponse.toDomain(): College? {
+    val id = collegeId ?: return null
+    val name = collegeName ?: return null
+    return College(collegeId = id, collegeName = name)
+}

app/src/main/java/com/eatssu/android/data/remote/dto/response/DepartmentResponse.kt

@@ -10,7 +10,9 @@ data class DepartmentResponse(
     val departmentName: String?,
 )
 
-fun DepartmentResponse.toDomain() = Department(
-    departmentId = this.departmentId ?: -1,
-    departmentName = this.departmentName ?: "학과",
-)
+// 이 함수가 null을 반환하는 경우, 이 함수를 호출하는 UserRepositoryImpl에서 mapNotNull로 걸러짐
+fun DepartmentResponse.toDomain(): Department? {
+    val id = departmentId ?: return null
+    val name = departmentName ?: return null
+    return Department(departmentId = id, departmentName = name)
+}

app/src/main/java/com/eatssu/android/data/remote/dto/response/UserCollegeDepartmentResponse.kt

@@ -15,14 +15,14 @@ data class UserCollegeDepartmentResponse(
     val collegeName: String?,
 )
 
-fun UserCollegeDepartmentResponse.toDomain(): Pair<College, Department> =
-    Pair(
-        College(
-            collegeId = this.collegeId ?: -1,
-            collegeName = this.collegeName ?: "단과대"
-        ),
-        Department(
-            departmentId = this.departmentId ?: -1,
-            departmentName = this.departmentName ?: "학과"
-        )
-    )
+// 이 함수가 null을 반환하는 경우, 이 함수를 호출하는 UserRepositoryImpl에서 mapNotNull로 걸러짐
+fun UserCollegeDepartmentResponse.toDomain(): Pair<College, Department>? {
+    val colId = collegeId ?: return null
+    val colName = collegeName ?: return null
+    val deptId = departmentId ?: return null
+    val deptName = departmentName ?: return null
+    return Pair(
+        College(collegeId = colId, collegeName = colName),
+        Department(departmentId = deptId, departmentName = deptName)
+    )
+}

app/src/main/java/com/eatssu/android/data/remote/repository/UserRepositoryImpl.kt

@@ -51,16 +51,16 @@ class UserRepositoryImpl @Inject constructor(
 
     override suspend fun getTotalColleges(): List<College> =
         userService.getCollegeList()
-            .map { list -> list.map { it.toDomain() } }
+            .map { list -> list.mapNotNull { it.toDomain() } }
             .orEmptyList()
 
     override suspend fun getTotalDepartments(collegeId: Int): List<Department> =
         userService.getDepartmentsByCollege(collegeId)
-            .map { list -> list.map { it.toDomain() } }
+            .map { list -> list.mapNotNull { it.toDomain() } }
             .orEmptyList()
 
     override suspend fun getUserCollegeDepartment(): Pair<College, Department>? =
-        userService.getUserCollegeDepartment().map { it.toDomain() }.orNull()
+        userService.getUserCollegeDepartment().orNull()?.toDomain()
 
     override suspend fun setUserDepartment(departmentId: Int): Boolean {
         return userService.setUserDepartment(UserDepartmentRequest(departmentId)).isSuccess()

app/src/main/java/com/eatssu/android/domain/model/AppLanguage.kt

@@ -0,0 +1,30 @@
+package com.eatssu.android.domain.model
+
+import java.util.Locale
+
+/**
+ * 앱에서 지원하는 언어 목록
+ * SYSTEM은 기기 언어를 따르며, 다른 옵션은 사용자가 직접 선택한 언어
+ */
+enum class AppLanguage(
+    val code: String,
+    val displayName: String,
+    val nativeDisplayName: String
+) {
+    SYSTEM("", "System Default", "시스템 언어"),
+    KOREAN("ko", "Korean", "한국어"),
+    ENGLISH("en", "English", "English"),
+    JAPANESE("ja", "Japanese", "日本語"),
+    CHINESE("zh", "Chinese", "中文"),
+    VIETNAMESE("vi", "Vietnamese", "Tiếng Việt");
+
+    companion object {
+        fun fromCode(code: String): AppLanguage {
+            return entries.find { it.code == code } ?: SYSTEM
+        }
+    }
+
+    fun toLocale(): Locale? {
+        return if (code.isEmpty()) null else Locale(code)
+    }
+}

app/src/main/java/com/eatssu/android/presentation/MainViewModel.kt

@@ -1,6 +1,5 @@
 package com.eatssu.android.presentation
 
-import android.content.Context
 import androidx.lifecycle.LiveData
 import androidx.lifecycle.MutableLiveData
 import androidx.lifecycle.ViewModel
@@ -13,9 +12,9 @@ import com.eatssu.android.domain.usecase.user.GetUserNickNameUseCase
 import com.eatssu.android.domain.usecase.user.SetUserCollegeDepartmentUseCase
 import com.eatssu.common.UiEvent
 import com.eatssu.common.UiState
+import com.eatssu.common.UiText
 import com.eatssu.common.enums.ToastType
 import dagger.hilt.android.lifecycle.HiltViewModel
-import dagger.hilt.android.qualifiers.ApplicationContext
 import kotlinx.coroutines.flow.MutableSharedFlow
 import kotlinx.coroutines.flow.MutableStateFlow
 import kotlinx.coroutines.flow.SharedFlow
@@ -32,8 +31,7 @@ class MainViewModel @Inject constructor(
     private val getUserNickNameUseCase: GetUserNickNameUseCase,
     private val setUserCollegeDepartmentUseCase: SetUserCollegeDepartmentUseCase,
     private val userRepository: UserRepository,
-    private val getUserCollegeDepartmentUseCase: GetUserCollegeDepartmentUseCase,
-    @ApplicationContext private val context: Context
+    private val getUserCollegeDepartmentUseCase: GetUserCollegeDepartmentUseCase
 ) : ViewModel() {
 
     private val _uiState: MutableStateFlow<UiState<MainState>> = MutableStateFlow(UiState.Init)
@@ -68,7 +66,7 @@ class MainViewModel @Inject constructor(
             // 1) 닉네임 없음
             if (nickname.isBlank()) {
                 _uiState.value = UiState.Success(MainState.NicknameNull)
-                _uiEvent.emit(UiEvent.ShowToast(context.getString(R.string.set_nickname), ToastType.ERROR))
+                _uiEvent.emit(UiEvent.ShowToast(UiText.StringResource(R.string.set_nickname), ToastType.ERROR))
                 return@launch
             }
 
@@ -83,7 +81,7 @@ class MainViewModel @Inject constructor(
             _uiState.value = UiState.Success(MainState.LoggedOut)
             _uiEvent.emit(
                 UiEvent.ShowToast(
-                    context.getString(R.string.toast_logout_success), ToastType.SUCCESS
+                    UiText.StringResource(R.string.toast_logout_success), ToastType.SUCCESS
                 )
             )
         }
@@ -120,7 +118,7 @@ class MainViewModel @Inject constructor(
                 _uiState.value = UiState.Error
                 _uiEvent.emit(
                     UiEvent.ShowToast(
-                        context.getString(R.string.not_found),
+                        UiText.StringResource(R.string.not_found),
                         ToastType.ERROR
                     )
                 )

app/src/main/java/com/eatssu/android/presentation/cafeteria/CafeteriaFragment.kt

@@ -8,6 +8,7 @@ import androidx.fragment.app.activityViewModels
 import androidx.recyclerview.widget.GridLayoutManager
 import androidx.recyclerview.widget.RecyclerView
 import androidx.viewpager2.widget.ViewPager2
+import com.eatssu.android.R
 import com.eatssu.android.databinding.FragmentCafeteriaBinding
 import com.eatssu.android.presentation.MainViewModel
 import com.eatssu.android.presentation.base.BaseFragment
@@ -49,7 +50,7 @@ class CafeteriaFragment : BaseFragment<FragmentCafeteriaBinding>(
         viewPager.adapter = viewpagerFragmentAdapter
         viewPager.setCurrentItem(viewpagerFragmentAdapter.getDefaultFragmentPosition(), false)
 
-        val tabTitles = listOf("아침", "점심", "저녁")
+        val tabTitles = listOf(getString(R.string.widget_morning), getString(R.string.widget_lunch), getString(R.string.widget_dinner))
         TabLayoutMediator(tabLayout, viewPager) { tab, position -> tab.text = tabTitles[position] }.attach()
 
         // ViewPager 페이지 변경 감지

app/src/main/java/com/eatssu/android/presentation/cafeteria/calendar/CalendarAdapter.kt

@@ -8,8 +8,6 @@ import com.eatssu.android.R
 import com.eatssu.android.databinding.ItemCalendarListBinding
 import com.eatssu.android.presentation.util.CalendarUtil
 import java.time.LocalDate
-import java.time.format.TextStyle
-import java.util.Locale
 
 
 internal class CalendarAdapter(
@@ -33,10 +31,14 @@ internal class CalendarAdapter(
 
 
     override fun onBindViewHolder(holder: CalendarViewHolder, position: Int) {
+        val context = holder.itemView.context
+
         val date = days[position]
         holder.dayOfMonth.text = date.dayOfMonth.toString()
-        holder.dayText.text =
-            date.dayOfWeek.getDisplayName(TextStyle.SHORT, Locale.KOREAN).toString()
+
+        // custom_weekdays 사용해 weekday 표기
+        val weekdayNames = context.resources.getStringArray(R.array.custom_weekdays)
+        holder.dayText.text = weekdayNames[date.dayOfWeek.value - 1]
 
         /**
          * iOS의 FSCalendar를 Custom으로 만들었습니다.
@@ -48,15 +50,15 @@ internal class CalendarAdapter(
             holder.dayOfMonth.setBackgroundResource(R.drawable.selector_background_blue)
             holder.dayOfMonth.setTextColor(
                 ContextCompat.getColor(
-                    holder.itemView.context,
+                    context,
                     R.color.selector_calendar_colortext
                 )
             )
         } else if (date == LocalDate.now() && date != CalendarUtil.selectedDate) {
             //오늘 날짜가 선택 되지 않았을 때, 오늘 날 text 색 지정
             holder.dayOfMonth.setTextColor(
                 ContextCompat.getColor(
-                    holder.itemView.context,
+                    context,
                     R.color.primary
                 )
             )

app/src/main/java/com/eatssu/android/presentation/cafeteria/info/InfoBottomSheetFragment.kt

@@ -40,7 +40,7 @@ class InfoBottomSheetFragment : BottomSheetDialogFragment() {
 
         EventLogger.clickRestaurantInfo(restaurantType)
 
-        binding.tvName.text = restaurantType.korean
+        binding.tvName.text = getString(restaurantType.displayNameResId)
 
         CoroutineScope(Dispatchers.Main).launch {
             val restaurantInfo = infoViewModel.getRestaurantInfo(restaurantType)

app/src/main/java/com/eatssu/android/presentation/cafeteria/menu/MenuAdapter.kt

@@ -38,7 +38,7 @@ class MenuAdapter(
                 Log.d("MenuAdapter", "bind: ${sectionModel.cafeteria}")
             }
 
-            binding.tvCafeteria.text = sectionModel.cafeteria.korean
+            binding.tvCafeteria.text = binding.root.context.getString(sectionModel.cafeteria.displayNameResId)
             binding.tvCafeteriaLocation.text = sectionModel.cafeteriaLocation
 
             binding.rvMenu.apply {

app/src/main/java/com/eatssu/android/presentation/cafeteria/review/list/ReviewListScreen.kt

@@ -32,6 +32,7 @@ import androidx.compose.ui.Modifier
 import androidx.compose.ui.draw.clip
 import androidx.compose.ui.platform.LocalContext
 import androidx.compose.ui.res.painterResource
+import androidx.compose.ui.res.stringResource
 import androidx.compose.ui.text.style.TextAlign
 import androidx.compose.ui.tooling.preview.Preview
 import androidx.compose.ui.unit.dp
@@ -144,13 +145,13 @@ internal fun ReviewListScreen(
     Scaffold(
         topBar = {
             EatSsuTopBar(
-                title = "리뷰",
+                title = stringResource(R.string.review),
                 onBack = onBack
             )
         },
         bottomBar = { // 하단에 버튼을 고정하기 위함
             EatSsuButton(
-                text = "리뷰 작성하기",
+                text = stringResource(R.string.review_write),
                 onClick = {
                     onReviewWriteButtonClick()
                 },
@@ -235,7 +236,7 @@ internal fun ReviewListScreen(
 
                             Row(Modifier.padding(horizontal = 24.dp)) {
                                 Text(
-                                    "리뷰",
+                                    stringResource(R.string.review),
                                     style = EatssuTheme.typography.h2,
                                 )
                                 Spacer(modifier = Modifier.width(6.dp))
@@ -320,7 +321,7 @@ internal fun ReviewListScreen(
                                     .padding(top = 100.dp)
                             ) {
                                 Text(
-                                    "에러가 발생했습니다.",
+                                    stringResource(R.string.review_error_occurred),
                                     style = EatssuTheme.typography.body1,
                                     modifier = Modifier.align(Alignment.Center)
                                 )
@@ -365,7 +366,7 @@ fun ReviewInfoContent(
                     )
                     Spacer(Modifier.width(4.dp))
                     Text(
-                        "오늘의 메뉴",
+                        stringResource(R.string.today_menu),
                         style = EatssuTheme.typography.subtitle1
                     )
                 }
@@ -441,13 +442,13 @@ fun EmptyReviewContent(modifier: Modifier) {
         )
         Spacer(Modifier.height(16.dp))
         Text(
-            "아직 작성된 리뷰가 없어요",
+            stringResource(R.string.none_review),
             style = EatssuTheme.typography.subtitle2,
             color = Gray600
         )
         Spacer(Modifier.height(8.dp))
         Text(
-            "메뉴에 가장 먼저 리뷰를 남겨주세요!",
+            stringResource(R.string.none_review_list_detail),
             style = EatssuTheme.typography.caption2,
             color = Gray600
         )