[WIP] Wh/photo library

app/build.gradle.kts

@@ -67,9 +67,9 @@ android {
 
 dependencies {
     implementation(project(":feature:home"))
+    implementation(project(":feature:photolibrary"))
 
     // TODO Wei
-//    implementation(project(":feature:login"))
 //    implementation(project(":feature:contactme"))
 
     implementation(project(":core:designsystem"))

app/src/main/java/com/wei/picquest/navigation/PqNavHost.kt

@@ -7,6 +7,7 @@ import androidx.window.layout.DisplayFeature
 import com.wei.picquest.core.designsystem.ui.DeviceOrientation
 import com.wei.picquest.feature.home.home.navigation.homeGraph
 import com.wei.picquest.feature.home.home.navigation.homeRoute
+import com.wei.picquest.feature.photolibrary.photolibrary.navigation.photoLibraryGraph
 import com.wei.picquest.ui.PqAppState
 
 /**
@@ -36,5 +37,8 @@ fun PqNavHost(
         homeGraph(
             navController = navController,
         )
+        photoLibraryGraph(
+            navController = navController,
+        )
     }
 }

app/src/main/java/com/wei/picquest/ui/PqAppState.kt

@@ -27,6 +27,8 @@ import com.wei.picquest.core.designsystem.ui.isBookPosture
 import com.wei.picquest.core.designsystem.ui.isSeparating
 import com.wei.picquest.feature.home.home.navigation.homeRoute
 import com.wei.picquest.feature.home.home.navigation.navigateToHome
+import com.wei.picquest.feature.photolibrary.photolibrary.navigation.navigateToPhotoLibrary
+import com.wei.picquest.feature.photolibrary.photolibrary.navigation.photoLibraryRoute
 import com.wei.picquest.navigation.TopLevelDestination
 import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.flow.SharingStarted
@@ -149,6 +151,7 @@ class PqAppState(
     val currentTopLevelDestination: TopLevelDestination?
         @Composable get() = when (currentDestination?.route) {
             homeRoute -> TopLevelDestination.HOME
+            photoLibraryRoute -> TopLevelDestination.PHOTO_LIBRARY
             else -> null
         }
 
@@ -196,10 +199,10 @@ class PqAppState(
                     topLevelNavOptions,
                 )
 
-//                TopLevelDestination.PHOTO_LIBRARY -> navController.navigateToPhotoLibrary(
-//                    topLevelNavOptions,
-//                )
-//
+                TopLevelDestination.PHOTO_LIBRARY -> navController.navigateToPhotoLibrary(
+                    topLevelNavOptions,
+                )
+
 //                TopLevelDestination.CONTACT_ME -> navController.navigateToContactMe(
 //                    topLevelNavOptions,
 //                )

build-logic/convention/src/main/kotlin/AndroidLibraryConventionPlugin.kt

@@ -36,6 +36,11 @@ class AndroidLibraryConventionPlugin : Plugin<Project> {
                 add("androidTestImplementation", kotlin("test"))
                 add("androidTestImplementation", project(":core:testing"))
 
+                // Paging 3
+                add("implementation", libs.findLibrary("paging-runtime").get())
+                add("implementation", libs.findLibrary("paging-compose").get())
+                add("testImplementation", libs.findLibrary("paging-common").get())
+
                 // Timber
                 add("implementation", libs.findLibrary("timber").get())
             }

core/data/src/main/java/com/wei/picquest/core/data/repository/DefaultSearchImagesRepository.kt

@@ -1,35 +1,32 @@
 package com.wei.picquest.core.data.repository
 
+import androidx.paging.Pager
+import androidx.paging.PagingConfig
+import androidx.paging.PagingData
 import com.wei.picquest.core.network.Dispatcher
 import com.wei.picquest.core.network.PqDispatchers
 import com.wei.picquest.core.network.PqNetworkDataSource
-import com.wei.picquest.core.network.model.NetworkSearchImages
+import com.wei.picquest.core.network.model.NetworkImageDetail
+import com.wei.picquest.core.network.retrofit.PixabayPagingSource
 import kotlinx.coroutines.CoroutineDispatcher
 import kotlinx.coroutines.flow.Flow
-import kotlinx.coroutines.flow.flow
-import kotlinx.coroutines.withContext
 import javax.inject.Inject
 
-/**
- * Implementation of the [SearchImagesRepository].
- * @param ioDispatcher 用於執行 IO 相關操作的 CoroutineDispatcher。
- * @param network 數據源的網路接口。
- */
 class DefaultSearchImagesRepository @Inject constructor(
     @Dispatcher(PqDispatchers.IO) private val ioDispatcher: CoroutineDispatcher,
-    private val network: PqNetworkDataSource,
+    private val pqNetworkDataSource: PqNetworkDataSource,
 ) : SearchImagesRepository {
 
-    /**
-     * @param query。A URL encoded search term. If omitted, all images are returned. This value may not exceed 100 characters.
-     * Example: "yellow+flower"
-     * @return 一個 Flow，內容為 Search Images 的數據。
-     */
     override suspend fun getSearchImages(
         query: String,
-    ): Flow<NetworkSearchImages> = withContext(ioDispatcher) {
-        flow {
-            emit(network.searchImages(query))
-        }
+    ): Flow<PagingData<NetworkImageDetail>> {
+        return Pager(
+            config = PagingConfig(
+                pageSize = 20,
+                prefetchDistance = 5,
+                enablePlaceholders = false,
+            ),
+            pagingSourceFactory = { PixabayPagingSource(pqNetworkDataSource, query) },
+        ).flow
     }
 }

core/data/src/main/java/com/wei/picquest/core/data/repository/SearchImagesRepository.kt

@@ -1,9 +1,10 @@
 package com.wei.picquest.core.data.repository
 
-import com.wei.picquest.core.network.model.NetworkSearchImages
+import androidx.paging.PagingData
+import com.wei.picquest.core.network.model.NetworkImageDetail
 import kotlinx.coroutines.flow.Flow
 
 interface SearchImagesRepository {
 
-    suspend fun getSearchImages(query: String): Flow<NetworkSearchImages>
+    suspend fun getSearchImages(query: String): Flow<PagingData<NetworkImageDetail>>
 }

core/network/src/main/java/com/wei/picquest/core/network/PqNetworkDataSource.kt

@@ -7,5 +7,5 @@ import com.wei.picquest.core.network.model.NetworkSearchImages
  */
 interface PqNetworkDataSource {
 
-    suspend fun searchImages(query: String): NetworkSearchImages
+    suspend fun searchImages(query: String, page: Int, perPage: Int): NetworkSearchImages
 }

core/network/src/main/java/com/wei/picquest/core/network/retrofit/PixabayPagingSource.kt

@@ -0,0 +1,37 @@
+package com.wei.picquest.core.network.retrofit
+
+import androidx.paging.PagingSource
+import androidx.paging.PagingState
+import com.wei.picquest.core.network.PqNetworkDataSource
+import com.wei.picquest.core.network.model.NetworkImageDetail
+
+class PixabayPagingSource(
+    private val pqNetworkDataSource: PqNetworkDataSource,
+    private val query: String,
+) : PagingSource<Int, NetworkImageDetail>() {
+
+    override suspend fun load(params: LoadParams<Int>): LoadResult<Int, NetworkImageDetail> {
+        try {
+            val currentPage = params.key ?: 1
+            val response = pqNetworkDataSource.searchImages(
+                query = query,
+                page = currentPage,
+                perPage = 20,
+            )
+
+            val endOfPaginationReached = response.hits.isEmpty()
+
+            return LoadResult.Page(
+                data = response.hits,
+                prevKey = if (currentPage == 1) null else currentPage - 1,
+                nextKey = if (endOfPaginationReached) null else currentPage + 1,
+            )
+        } catch (exception: Exception) {
+            return LoadResult.Error(exception)
+        }
+    }
+
+    override fun getRefreshKey(state: PagingState<Int, NetworkImageDetail>): Int? {
+        return state.anchorPosition
+    }
+}

core/network/src/main/java/com/wei/picquest/core/network/retrofit/RetrofitPqNetwork.kt

@@ -28,6 +28,8 @@ interface RetrofitPixabayApi {
         @Query("key") apiKey: String = API_KEY,
         @Query("q") query: String,
         @Query("image_type") imageType: String = "photo",
+        @Query("page") page: Int,
+        @Query("perPage") perPage: Int,
         // Add more parameters as needed
     ): NetworkSearchImages
 }
@@ -50,7 +52,7 @@ class RetrofitPqNetwork @Inject constructor(
         .build()
         .create(RetrofitPixabayApi::class.java)
 
-    override suspend fun searchImages(query: String): NetworkSearchImages {
-        return pixabayApi.searchImages(query = query)
+    override suspend fun searchImages(query: String, page: Int, perPage: Int): NetworkSearchImages {
+        return pixabayApi.searchImages(query = query, page = page, perPage = perPage)
     }
 }

feature/home/src/main/java/com/wei/picquest/feature/home/home/HomeScreen.kt

@@ -62,7 +62,6 @@ internal fun HomeRoute(
 internal fun HomeScreen(
     withTopSpacer: Boolean = true,
     withBottomSpacer: Boolean = true,
-    isPreview: Boolean = false,
 ) {
     val showPopup = remember { mutableStateOf(false) }
 
@@ -108,8 +107,6 @@ internal fun HomeScreen(
 @Composable
 fun HomeScreenPreview() {
     PqTheme {
-        HomeScreen(
-            isPreview = true,
-        )
+        HomeScreen()
     }
 }

feature/photolibrary/.gitignore

@@ -0,0 +1 @@
+/build

feature/photolibrary/build.gradle.kts

@@ -0,0 +1,12 @@
+plugins {
+    alias(libs.plugins.pq.android.feature)
+    alias(libs.plugins.pq.android.library.compose)
+    alias(libs.plugins.pq.android.hilt)
+}
+
+android {
+    namespace = "com.wei.picquest.feature.photolibrary"
+}
+
+dependencies {
+}

feature/photolibrary/src/main/AndroidManifest.xml

@@ -0,0 +1,4 @@
+<?xml version="1.0" encoding="utf-8"?>
+<manifest xmlns:android="http://schemas.android.com/apk/res/android">
+
+</manifest>