[NDGL-124] feat: 인기 여행 목록 더 불러오기 기능 구현

Author: jihee-dev

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

@@ -61,7 +61,7 @@ fun CommonErrorView(
 private fun CommonErrorViewPreview() {
     NDGLTheme {
         CommonErrorView(
-            modifier = Modifier
+            modifier = Modifier,
         )
     }
 }

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,
+        }
+    }
 }