친구 찾기 화면 틀 구현

app/src/main/java/com/whyranoid/walkie/KoinModules.kt

@@ -7,6 +7,7 @@ import com.whyranoid.data.API
 import com.whyranoid.data.AccountDataStore
 import com.whyranoid.data.AppDatabase
 import com.whyranoid.data.datasource.ChallengeDataSourceImpl
+import com.whyranoid.data.datasource.OtherUserPagingSource
 import com.whyranoid.data.datasource.UserDataSourceImpl
 import com.whyranoid.data.datasource.account.AccountDataSourceImpl
 import com.whyranoid.data.datasource.account.AccountService
@@ -21,6 +22,7 @@ import com.whyranoid.data.repository.ChallengeRepositoryImpl
 import com.whyranoid.data.repository.FollowRepositoryImpl
 import com.whyranoid.data.repository.GpsRepositoryImpl
 import com.whyranoid.data.repository.NetworkRepositoryImpl
+import com.whyranoid.data.repository.OtherUserRepositoryImpl
 import com.whyranoid.data.repository.PostRepositoryImpl
 import com.whyranoid.data.repository.RunningHistoryRepositoryImpl
 import com.whyranoid.data.repository.RunningRepositoryImpl
@@ -36,6 +38,7 @@ import com.whyranoid.domain.repository.ChallengeRepository
 import com.whyranoid.domain.repository.FollowRepository
 import com.whyranoid.domain.repository.GpsRepository
 import com.whyranoid.domain.repository.NetworkRepository
+import com.whyranoid.domain.repository.OtherUserRepository
 import com.whyranoid.domain.repository.PostRepository
 import com.whyranoid.domain.repository.RunningHistoryRepository
 import com.whyranoid.domain.repository.RunningRepository
@@ -45,6 +48,7 @@ import com.whyranoid.domain.usecase.GetChallengePreviewsByTypeUseCase
 import com.whyranoid.domain.usecase.GetChallengingPreviewsUseCase
 import com.whyranoid.domain.usecase.GetNewChallengePreviewsUseCase
 import com.whyranoid.domain.usecase.GetPostUseCase
+import com.whyranoid.domain.usecase.GetSearchedUserUseCase
 import com.whyranoid.domain.usecase.GetUserBadgesUseCase
 import com.whyranoid.domain.usecase.GetUserDetailUseCase
 import com.whyranoid.domain.usecase.GetUserPostPreviewsUseCase
@@ -58,6 +62,7 @@ import com.whyranoid.presentation.screens.mypage.editprofile.EditProfileViewMode
 import com.whyranoid.presentation.viewmodel.AddPostViewModel
 import com.whyranoid.presentation.viewmodel.RunningEditViewModel
 import com.whyranoid.presentation.viewmodel.RunningViewModel
+import com.whyranoid.presentation.viewmodel.SearchFriendViewModel
 import com.whyranoid.presentation.viewmodel.SelectHistoryViewModel
 import com.whyranoid.presentation.viewmodel.SignInViewModel
 import com.whyranoid.presentation.viewmodel.SplashViewModel
@@ -87,6 +92,7 @@ val viewModelModule = module {
     factory { SelectHistoryViewModel(get()) }
     factory { EditProfileViewModel(get()) }
     factory { AddPostViewModel(get()) }
+    factory { SearchFriendViewModel(get()) }
 }
 
 val repositoryModule = module {
@@ -99,6 +105,7 @@ val repositoryModule = module {
     single<FollowRepository> { FollowRepositoryImpl(get()) }
     single<NetworkRepository> { NetworkRepositoryImpl(get()) }
     single<GpsRepository> { GpsRepositoryImpl(get()) }
+    single<OtherUserRepository> { OtherUserRepositoryImpl(OtherUserPagingSource()) }
 }
 
 val dataSourceModule = module {
@@ -125,6 +132,7 @@ val useCaseModule = module {
     single { SignOutUseCase(get()) }
     single { UploadPostUseCase(get(), get()) }
     single { SendLikeUseCase(get(), get()) }
+    single { GetSearchedUserUseCase(get()) }
 }
 
 val databaseModule = module {

data/build.gradle.kts

@@ -77,4 +77,9 @@ dependencies {
 
     // Retrofit
     implementation("com.squareup.retrofit2:retrofit:2.9.0")
+
+    // paging
+    val pagingVersion = "3.2.1"
+    implementation("androidx.paging:paging-runtime-ktx:$pagingVersion")
+    implementation("androidx.paging:paging-compose:$pagingVersion")
 }

data/src/main/java/com/whyranoid/data/datasource/OtherUserPagingSource.kt

@@ -0,0 +1,61 @@
+package com.whyranoid.data.datasource
+
+import androidx.paging.PagingSource
+import androidx.paging.PagingState
+import com.whyranoid.domain.model.user.User
+
+class OtherUserPagingSource(
+    private val dataSource: FakeFoundUserApi = FakeFoundUserApi,
+) : PagingSource<Int, User>() {
+    override suspend fun load(
+        params: LoadParams<Int>
+    ): LoadResult<Int, User> {
+        return try {
+            val pageNumber = params.key ?: 1
+            val response = dataSource.searchUsers(pageNumber)
+            LoadResult.Page(
+                data = response.data,
+                prevKey = null, // Only paging forward.
+                nextKey = pageNumber + PAGE_SIZE
+            )
+        } catch (e: Exception) {
+            LoadResult.Error(e)
+        }
+    }
+
+
+    override fun getRefreshKey(state: PagingState<Int, User>): Int? {
+        return state.anchorPosition?.let { anchorPosition ->
+            val anchorPage = state.closestPageToPosition(anchorPosition)
+            anchorPage?.prevKey?.plus(1) ?: anchorPage?.nextKey?.minus(1)
+        }
+    }
+
+    companion object {
+        const val PAGE_SIZE = 10
+    }
+}
+
+object FakeFoundUserApi {
+    private val DUMMY = (0..1000).map {
+        User.DUMMY.copy(
+            uid = it.toLong(),
+            name = "유저 $it",
+            nickname = "유저 $it",
+        )
+    }
+
+    fun searchUsers(
+        page: Int
+    ): UserPageData {
+        return UserPageData(
+            data = DUMMY.subList(page, page + 10),
+        )
+    }
+
+
+}
+
+data class UserPageData(
+    val data: List<User>,
+)

data/src/main/java/com/whyranoid/data/repository/OtherUserRepositoryImpl.kt

@@ -0,0 +1,22 @@
+package com.whyranoid.data.repository
+
+import androidx.paging.Pager
+import androidx.paging.PagingConfig
+import com.whyranoid.data.datasource.OtherUserPagingSource
+import com.whyranoid.domain.model.user.User
+import com.whyranoid.domain.repository.OtherUserRepository
+
+class OtherUserRepositoryImpl(
+    private val otherUserPagingSource: OtherUserPagingSource
+): OtherUserRepository {
+    override fun searchUsers(query: String): Pager<Int, User> {
+        return Pager(
+            PagingConfig(
+                pageSize = 10,
+                enablePlaceholders = true,
+            )
+        ) {
+            otherUserPagingSource
+        }
+    }
+}

domain/build.gradle.kts

@@ -13,4 +13,8 @@ dependencies {
 
     // Coroutine
     implementation("org.jetbrains.kotlinx:kotlinx-coroutines-core:1.6.4")
+
+    val pagingVersion = "3.2.1"
+    implementation("androidx.paging:paging-common:$pagingVersion")
+
 }

domain/src/main/java/com/whyranoid/domain/repository/OtherUserRepository.kt

@@ -0,0 +1,9 @@
+package com.whyranoid.domain.repository
+
+import androidx.paging.Pager
+import com.whyranoid.domain.model.user.User
+
+interface OtherUserRepository {
+
+    fun searchUsers(query: String): Pager<Int, User>
+}

domain/src/main/java/com/whyranoid/domain/usecase/GetSearchedUserUseCase.kt

@@ -0,0 +1,9 @@
+package com.whyranoid.domain.usecase
+
+import com.whyranoid.domain.repository.OtherUserRepository
+
+class GetSearchedUserUseCase(
+    private val otherUserRepository: OtherUserRepository,
+) {
+    operator fun invoke(query: String) = otherUserRepository.searchUsers(query).flow
+}

presentation/build.gradle.kts

@@ -142,4 +142,10 @@ dependencies {
     implementation("com.google.firebase:firebase-analytics-ktx")
     implementation("com.google.firebase:firebase-auth-ktx:22.1.1")
     implementation("com.google.android.gms:play-services-auth:20.6.0")
+
+    // paging
+    val pagingVersion = "3.2.1"
+    val pagingForComposeVersion = "1.0.0-alpha18"
+    implementation("androidx.paging:paging-runtime-ktx:$pagingVersion")
+    implementation("androidx.paging:paging-compose:$pagingForComposeVersion")
 }

presentation/src/main/java/com/whyranoid/presentation/screens/AppScreen.kt

@@ -41,6 +41,7 @@ import com.whyranoid.presentation.screens.challenge.ChallengeCompleteScreen
 import com.whyranoid.presentation.screens.challenge.ChallengeDetailScreen
 import com.whyranoid.presentation.screens.challenge.ChallengeExitScreen
 import com.whyranoid.presentation.screens.challenge.ChallengeMainScreen
+import com.whyranoid.presentation.screens.community.SearchFriendScreen
 import com.whyranoid.presentation.screens.mypage.MyPageScreen
 import com.whyranoid.presentation.screens.mypage.addpost.AddPostScreen
 import com.whyranoid.presentation.screens.mypage.editprofile.EditProfileScreen
@@ -158,6 +159,9 @@ fun AppScreenContent(startWorker: () -> Unit, navController: NavHostController)
             composable(Screen.Community.route) {
                 CommunityScreen(navController)
             }
+            composable(Screen.SearchFriendScreen.route) {
+                SearchFriendScreen(navController)
+            }
             composable(Screen.ChallengeMainScreen.route) {
                 ChallengeMainScreen(navController)
             }

presentation/src/main/java/com/whyranoid/presentation/screens/CommunityScreen.kt

@@ -64,6 +64,7 @@ fun CommunityScreen(
                         Icon(
                             modifier = Modifier
                                 .clickable {
+                                    navController.navigate(Screen.SearchFriendScreen.route)
                                 },
                             imageVector = Icons.Filled.Search,
                             contentDescription = "검색 버튼",

presentation/src/main/java/com/whyranoid/presentation/screens/Screen.kt

@@ -29,6 +29,10 @@ sealed class Screen(
         R.drawable.ic_community_screen_selected,
     )
 
+    object SearchFriendScreen : Screen(
+        "searchFriendScreen",
+    )
+
     object ChallengeMainScreen :
         Screen(
             "challengeMain",