[NDGL-124] 인기 여행 목록 페이지 paging 구현 및 에러 뷰 추가

core/ui/src/main/java/com/yapp/ndgl/core/ui/CommonErrorView.kt

@@ -0,0 +1,67 @@
+package com.yapp.ndgl.core.ui
+
+import androidx.compose.foundation.Image
+import androidx.compose.foundation.layout.Arrangement
+import androidx.compose.foundation.layout.Column
+import androidx.compose.foundation.layout.fillMaxWidth
+import androidx.compose.foundation.layout.padding
+import androidx.compose.foundation.layout.size
+import androidx.compose.material3.Text
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Alignment
+import androidx.compose.ui.Modifier
+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
+import com.yapp.ndgl.core.ui.theme.NDGLTheme
+
+@Composable
+fun CommonErrorView(
+    modifier: Modifier = Modifier,
+    title: String? = null,
+    description: String? = null,
+) {
+    Column(
+        modifier = modifier
+            .fillMaxWidth()
+            .padding(horizontal = 24.dp, vertical = 165.dp),
+        verticalArrangement = Arrangement.spacedBy(16.dp),
+        horizontalAlignment = Alignment.CenterHorizontally,
+    ) {
+        Image(
+            painter = painterResource(R.drawable.img_empty_browser),
+            contentDescription = null,
+            modifier = Modifier.size(100.dp),
+        )
+        Column(
+            modifier = Modifier.fillMaxWidth(),
+            verticalArrangement = Arrangement.spacedBy(4.dp),
+            horizontalAlignment = Alignment.CenterHorizontally,
+        ) {
+            Text(
+                text = title ?: stringResource(R.string.common_error_title),
+                color = NDGLTheme.colors.black500,
+                textAlign = TextAlign.Center,
+                style = NDGLTheme.typography.subtitleMdSemiBold,
+            )
+            Text(
+                text = description ?: stringResource(R.string.common_error_description),
+                color = NDGLTheme.colors.black400,
+                textAlign = TextAlign.Center,
+                style = NDGLTheme.typography.bodyLgRegular,
+            )
+        }
+    }
+}
+
+@Preview(showBackground = true)
+@Composable
+private fun CommonErrorViewPreview() {
+    NDGLTheme {
+        CommonErrorView(
+            modifier = Modifier,
+        )
+    }
+}

core/ui/src/main/res/values/strings.xml

@@ -15,6 +15,9 @@
     <string name="common_dot_separator">•</string>
     <string name="common_retry">다시 시도</string>
     <string name="common_all">전체</string>
+    <string name="common_err_unknown">알 수 없는 오류입니다</string>
+    <string name="common_error_title">정보를 불러올 수 없어요</string>
+    <string name="common_error_description">인터넷 연결 확인 후 다시 시도해 주세요</string>
 
     <!-- User Guide Modal -->
     <string name="user_guide_modal_title">서비스 이용 전\n반드시 확인해주세요.</string>

data/travel/src/main/java/com/yapp/ndgl/data/travel/repository/TravelTemplateRepository.kt

@@ -18,13 +18,14 @@ import javax.inject.Singleton
 class TravelTemplateRepository @Inject constructor(
     private val travelTemplateApi: TravelTemplateApi,
 ) {
-    suspend fun getAllPopularTravelTemplates(): PopularTravelTemplates {
-        return travelTemplateApi.getPopularTravelTemplates().getData()
+    suspend fun getAllPopularTravelTemplates(page: Int = 0): PopularTravelTemplates {
+        return travelTemplateApi.getPopularTravelTemplates(page = page).getData()
     }
 
-    suspend fun getPopularTravelTemplates(travelProgramId: Long): PopularTravelTemplates {
+    suspend fun getPopularTravelTemplates(travelProgramId: Long, page: Int = 0): PopularTravelTemplates {
         return travelTemplateApi.getPopularTravelTemplates(
             travelProgramId = travelProgramId,
+            page = page,
         ).getData()
     }
 

feature/home/src/main/java/com/yapp/ndgl/feature/home/popular/PopularTravelListContract.kt

@@ -1,6 +1,7 @@
 package com.yapp.ndgl.feature.home.popular
 
 import androidx.compose.runtime.Immutable
+import androidx.compose.runtime.Stable
 import com.yapp.ndgl.core.base.UiIntent
 import com.yapp.ndgl.core.base.UiSideEffect
 import com.yapp.ndgl.core.base.UiState
@@ -9,32 +10,50 @@ import com.yapp.ndgl.feature.home.model.TravelProgramTab
 import kotlinx.collections.immutable.ImmutableList
 import kotlinx.collections.immutable.ImmutableMap
 import kotlinx.collections.immutable.persistentListOf
-import kotlinx.collections.immutable.persistentMapOf
-
-@Immutable
-data class PopularTravelListState(
-    val travelProgramTabs: ImmutableList<TravelProgramTab> = persistentListOf(),
-    val selectedTabIndex: Int = 0,
-    val allPopularTravels: ImmutableList<TravelContent> = persistentListOf(),
-    val popularTravelsByProgram: ImmutableMap<Long, ImmutableList<TravelContent>> = persistentMapOf(),
-) : UiState {
-    val selectedProgramTravels: ImmutableList<TravelContent> by lazy {
-        val selectTab = travelProgramTabs.getOrElse(selectedTabIndex) { TravelProgramTab.All }
-
-        when (selectTab) {
-            TravelProgramTab.All -> allPopularTravels
-            is TravelProgramTab.Custom -> popularTravelsByProgram.getOrDefault(
-                selectTab.programId,
-                persistentListOf(),
-            )
+
+@Stable
+sealed class PopularTravelListState : UiState {
+    data object Loading : PopularTravelListState()
+
+    @Immutable
+    data class Success(
+        val travelProgramTabs: ImmutableList<TravelProgramTab>,
+        val allPopularTravels: ImmutableList<PopularTravelListItem>,
+        val popularTravelsByProgram: ImmutableMap<Long, ImmutableList<PopularTravelListItem>>,
+        val selectedTabIndex: Int = 0,
+    ) : PopularTravelListState() {
+        val selectedProgramTravels: ImmutableList<PopularTravelListItem> by lazy {
+            val selectTab = travelProgramTabs.getOrElse(selectedTabIndex) { TravelProgramTab.All }
+
+            when (selectTab) {
+                TravelProgramTab.All -> allPopularTravels
+                is TravelProgramTab.Custom -> popularTravelsByProgram.getOrDefault(
+                    selectTab.programId,
+                    persistentListOf(),
+                )
+            }
+        }
+
+        sealed interface PopularTravelListItem {
+            data class Travel(
+                val travelContent: TravelContent,
+            ) : PopularTravelListItem
+
+            data class Loading(
+                val nextPage: Int,
+            ) : PopularTravelListItem
         }
     }
+
+    data object Error : PopularTravelListState()
 }
 
 sealed interface PopularTravelListIntent : UiIntent {
     data object ClickSearchTravelTemplate : PopularTravelListIntent
     data class SelectPopularTravelTab(val index: Int) : PopularTravelListIntent
     data class ClickTravel(val travelId: Long, val days: Int) : PopularTravelListIntent
+    data class LoadMore(val nextPage: Int) : PopularTravelListIntent
+    data object ClickRetry : PopularTravelListIntent
 }
 
 sealed interface PopularTravelListSideEffect : UiSideEffect {
@@ -43,4 +62,10 @@ sealed interface PopularTravelListSideEffect : UiSideEffect {
         val travelId: Long,
         val days: Int,
     ) : PopularTravelListSideEffect
+
+    data class ShowSnackBar(val type: Type) : PopularTravelListSideEffect {
+        enum class Type {
+            ERR_UNKNOWN,
+        }
+    }
 }