[FEAT/#315] 딱 맞는 인턴 공고 페이징 구현

build-logic/src/main/java/terning.kotlin.library.gradle.kts

@@ -1,3 +1,4 @@
+import com.terning.build_logic.convention.configureCoroutineKotlin
 import com.terning.build_logic.convention.configureKotlin
 
 plugins {

data/home/build.gradle.kts

@@ -11,4 +11,7 @@ android {
 dependencies {
     // domain
     implementation(projects.domain.home)
+
+    //paging
+    implementation(libs.paging.runtime)
 }

data/home/src/main/java/com/terning/data/home/datasource/HomeDataSource.kt

@@ -12,6 +12,7 @@ interface HomeDataSource {
 
     suspend fun getRecommendIntern(
         sortBy: String,
+        page: Int,
     ): BaseResponse<HomeRecommendInternResponseDto>
 
     suspend fun getFilteringInfo(): BaseResponse<HomeFilteringInfoResponseDto>

data/home/src/main/java/com/terning/data/home/datasourceimpl/HomeDataSourceImpl.kt

@@ -18,9 +18,11 @@ class HomeDataSourceImpl @Inject constructor(
 
     override suspend fun getRecommendIntern(
         sortBy: String,
+        page: Int,
     ): BaseResponse<HomeRecommendInternResponseDto> =
         homeService.getRecommendIntern(
             sortBy = sortBy,
+            page = page
         )
 
     override suspend fun getFilteringInfo(): BaseResponse<HomeFilteringInfoResponseDto> =

data/home/src/main/java/com/terning/data/home/dto/response/HomeRecommendInternResponseDto.kt

@@ -7,6 +7,8 @@ import kotlinx.serialization.Serializable
 data class HomeRecommendInternResponseDto(
     @SerialName("totalCount")
     val totalCount: Int,
+    @SerialName("hasNext")
+    val hasNextPage: Boolean,
     @SerialName("result")
     val result: List<Result>
 ) {

data/home/src/main/java/com/terning/data/home/mapper/HomeRecommendInternMapper.kt

@@ -1,25 +1,19 @@
 package com.terning.data.home.mapper
 
 import com.terning.data.home.dto.response.HomeRecommendInternResponseDto
-import com.terning.domain.home.entity.HomeRecommendIntern
+import com.terning.domain.home.entity.HomeRecommendedIntern
 
-fun HomeRecommendInternResponseDto.toHomeRecommendInternList(): HomeRecommendIntern =
-    HomeRecommendIntern(
-        totalCount = this.totalCount,
-        homeRecommendInternDetail = this.result.map {
-            it.toHomeRecommendInternDetail()
-        }
-    )
 
-fun HomeRecommendInternResponseDto.Result.toHomeRecommendInternDetail(): HomeRecommendIntern.HomeRecommendInternDetail =
-    HomeRecommendIntern.HomeRecommendInternDetail(
+fun HomeRecommendInternResponseDto.Result.toHomeRecommendedIntern(totalCount: Int): HomeRecommendedIntern =
+    HomeRecommendedIntern(
+        totalCount = totalCount,
         internshipAnnouncementId = this.internshipAnnouncementId,
-        title = this.title,
+        companyImage = this.companyImage,
         dDay = this.dDay,
-        deadline = deadline,
+        title = this.title,
         workingPeriod = this.workingPeriod,
-        startYearMonth = this.startYearMonth,
-        companyImage = this.companyImage,
         isScrapped = this.isScrapped,
         color = this.color,
+        deadline = this.deadline,
+        startYearMonth = this.startYearMonth,
     )

data/home/src/main/java/com/terning/data/home/pagingsource/HomePagingSource.kt

@@ -0,0 +1,40 @@
+package com.terning.data.home.pagingsource
+
+import androidx.paging.PagingSource
+import androidx.paging.PagingState
+import com.terning.data.home.datasource.HomeDataSource
+import com.terning.data.home.dto.response.HomeRecommendInternResponseDto
+
+class HomePagingSource(
+    private val sortBy: String,
+    private val dataSource: HomeDataSource
+) : PagingSource<Int, Pair<Int, HomeRecommendInternResponseDto.Result>>() {
+
+
+    override suspend fun load(params: LoadParams<Int>): LoadResult<Int, Pair<Int, HomeRecommendInternResponseDto.Result>> {
+        return try {
+            val nextParamKey = params.key ?: 0
+
+            val response = dataSource.getRecommendIntern(sortBy = sortBy, page = nextParamKey)
+            val totalCount = response.result.totalCount
+            val hasNextPage = response.result.hasNextPage
+
+            LoadResult.Page(
+                data = response.result.result.map {
+                    Pair(totalCount, it)
+                },
+                prevKey = null, // 다음 페이지 로딩만 가능하도록 설정
+                nextKey = if (hasNextPage) nextParamKey + 1 else null
+            )
+        } catch (e: Exception) {
+            LoadResult.Error(e)
+        }
+    }
+
+    override fun getRefreshKey(state: PagingState<Int, Pair<Int, HomeRecommendInternResponseDto.Result>>): Int? {
+        return state.anchorPosition?.let { anchorPosition ->
+            val anchorPage = state.closestPageToPosition(anchorPosition)
+            anchorPage?.prevKey?.plus(1) ?: anchorPage?.nextKey?.minus(1)
+        }
+    }
+}

data/home/src/main/java/com/terning/data/home/repositoryimpl/HomeRepositoryImpl.kt

@@ -1,33 +1,45 @@
 package com.terning.data.home.repositoryimpl
 
+import androidx.paging.Pager
+import androidx.paging.PagingConfig
+import androidx.paging.PagingData
+import androidx.paging.map
 import com.terning.data.home.datasource.HomeDataSource
 import com.terning.data.home.dto.request.toChangeFilterRequestDto
 import com.terning.data.home.mapper.toHomeFilteringInfo
-import com.terning.data.home.mapper.toHomeRecommendInternList
+import com.terning.data.home.mapper.toHomeRecommendedIntern
 import com.terning.data.home.mapper.toHomeUpcomingInternList
+import com.terning.data.home.pagingsource.HomePagingSource
 import com.terning.domain.home.entity.ChangeFilteringRequestModel
 import com.terning.domain.home.entity.HomeFilteringInfo
-import com.terning.domain.home.entity.HomeRecommendIntern
+import com.terning.domain.home.entity.HomeRecommendedIntern
 import com.terning.domain.home.entity.HomeUpcomingIntern
 import com.terning.domain.home.repository.HomeRepository
+import kotlinx.coroutines.flow.Flow
+import kotlinx.coroutines.flow.map
 import javax.inject.Inject
 
 class HomeRepositoryImpl @Inject constructor(
     private val homeDataSource: HomeDataSource,
 ) : HomeRepository {
+
     override suspend fun getHomeUpcomingInternList(): Result<HomeUpcomingIntern> =
         runCatching {
             homeDataSource.getUpcomingIntern().result.toHomeUpcomingInternList()
         }
 
-    override suspend fun getRecommendIntern(
-        sortBy: String,
-    ): Result<HomeRecommendIntern> =
-        runCatching {
-            homeDataSource.getRecommendIntern(
+    override fun getRecommendIntern(sortBy: String): Flow<PagingData<HomeRecommendedIntern>> {
+        return Pager(
+            PagingConfig(pageSize = 10)
+        ) {
+            HomePagingSource(
                 sortBy = sortBy,
-            ).result.toHomeRecommendInternList()
+                dataSource = homeDataSource
+            )
+        }.flow.map { pagedData ->
+            pagedData.map { it.second.toHomeRecommendedIntern(it.first) }
         }
+    }
 
     override suspend fun getFilteringInfo(): Result<HomeFilteringInfo> =
         runCatching {

data/home/src/main/java/com/terning/data/home/service/HomeService.kt

@@ -18,6 +18,7 @@ interface HomeService {
     @GET("api/v1/home")
     suspend fun getRecommendIntern(
         @Query("sortBy") sortBy: String,
+        @Query("page") page: Int,
     ): BaseResponse<HomeRecommendInternResponseDto>
 
     @GET("api/v1/filters")

domain/home/build.gradle.kts

@@ -1,3 +1,9 @@
 plugins {
     alias(libs.plugins.terning.kotlin)
+}
+
+dependencies {
+    implementation(libs.paging.common)
+    implementation(libs.coroutines.core)
+    implementation(libs.coroutines.test)
 }

domain/home/src/main/java/com/terning/domain/home/entity/HomeRecommendedIntern.kt

@@ -0,0 +1,14 @@
+package com.terning.domain.home.entity
+
+data class HomeRecommendedIntern(
+    val totalCount: Int,
+    val internshipAnnouncementId: Long,
+    val companyImage: String,
+    val dDay: String,
+    val title: String,
+    val workingPeriod: String,
+    val isScrapped: Boolean,
+    val color: String?,
+    val deadline: String,
+    val startYearMonth: String,
+)

domain/home/src/main/java/com/terning/domain/home/repository/HomeRepository.kt

@@ -1,16 +1,18 @@
 package com.terning.domain.home.repository
 
+import androidx.paging.PagingData
 import com.terning.domain.home.entity.ChangeFilteringRequestModel
 import com.terning.domain.home.entity.HomeFilteringInfo
-import com.terning.domain.home.entity.HomeRecommendIntern
+import com.terning.domain.home.entity.HomeRecommendedIntern
 import com.terning.domain.home.entity.HomeUpcomingIntern
+import kotlinx.coroutines.flow.Flow
 
 interface HomeRepository {
     suspend fun getHomeUpcomingInternList(): Result<HomeUpcomingIntern>
 
-    suspend fun getRecommendIntern(
-        sortBy: String,
-    ): Result<HomeRecommendIntern>
+    fun getRecommendIntern(
+        sortBy: String
+    ): Flow<PagingData<HomeRecommendedIntern>>
 
     suspend fun getFilteringInfo(): Result<HomeFilteringInfo>
 

feature/home/build.gradle.kts

@@ -16,4 +16,8 @@ dependencies {
 
     // feature
     implementation(projects.feature.dialog)
+
+    // paging
+    implementation(libs.paging.runtime)
+    implementation(libs.paging.compose)
 }