Select Query must return a flow

data/src/main/java/com/ericampire/android/androidstudycase/data/datasource/blog/BlogDataSource.kt

@@ -2,8 +2,10 @@ package com.ericampire.android.androidstudycase.data.datasource.blog
 
 
 import com.ericampire.android.androidstudycase.domain.entity.Blog
+import com.ericampire.android.androidstudycase.util.Result
+import kotlinx.coroutines.flow.Flow
 
 interface BlogDataSource {
-  suspend fun findAll(): List<Blog>
+  fun findAll(): Flow<Result<List<Blog>>>
   suspend fun save(blog: Blog)
 }

data/src/main/java/com/ericampire/android/androidstudycase/data/datasource/blog/LocalBlogDataSource.kt

@@ -2,13 +2,18 @@ package com.ericampire.android.androidstudycase.data.datasource.blog
 
 import com.ericampire.android.androidstudycase.data.room.BlogDao
 import com.ericampire.android.androidstudycase.domain.entity.Blog
+import com.ericampire.android.androidstudycase.util.Result
+import kotlinx.coroutines.flow.Flow
+import kotlinx.coroutines.flow.map
 import javax.inject.Inject
 
 class LocalBlogDataSource @Inject constructor(
   private val dao: BlogDao
 ) : BlogDataSource {
-  override suspend fun findAll(): List<Blog> {
-    return dao.findAll()
+  override fun findAll(): Flow<Result<List<Blog>>> {
+    return dao.findAll().map {
+      Result.Success(it)
+    }
   }
 
   override suspend fun save(blog: Blog) {

data/src/main/java/com/ericampire/android/androidstudycase/data/datasource/blog/RemoteBlogDataSource.kt

@@ -3,16 +3,26 @@ package com.ericampire.android.androidstudycase.data.datasource.blog
 import com.ericampire.android.androidstudycase.domain.entity.Blog
 import com.ericampire.android.androidstudycase.domain.entity.BlogApiResponse
 import com.ericampire.android.androidstudycase.util.ApiUrl
+import com.ericampire.android.androidstudycase.util.Result
 import io.ktor.client.*
 import io.ktor.client.request.*
+import kotlinx.coroutines.flow.Flow
+import kotlinx.coroutines.flow.flow
 import javax.inject.Inject
 
 class RemoteBlogDataSource @Inject constructor(
   private val httpClient: HttpClient
 ) : BlogDataSource {
-  override suspend fun findAll(): List<Blog> {
-    val data = httpClient.get<BlogApiResponse>(ApiUrl.Blog.latest)
-    return data.blogBlogData.blogPage.blogs
+  override fun findAll(): Flow<Result<List<Blog>>> {
+    return flow {
+      try {
+        val data = httpClient.get<BlogApiResponse>(ApiUrl.Blog.latest)
+        emit(Result.Success(data.blogBlogData.blogPage.blogs))
+      } catch (e: Exception) {
+        emit(Result.Error(e))
+      }
+    }
+
   }
 
   override suspend fun save(blog: Blog) {

data/src/main/java/com/ericampire/android/androidstudycase/data/room/BlogDao.kt

@@ -5,6 +5,7 @@ import androidx.room.Insert
 import androidx.room.OnConflictStrategy
 import androidx.room.Query
 import com.ericampire.android.androidstudycase.domain.entity.Blog
+import kotlinx.coroutines.flow.Flow
 
 @Dao
 interface BlogDao {
@@ -12,5 +13,5 @@ interface BlogDao {
   suspend fun save(blog: Blog)
 
   @Query("SELECT * FROM Blog")
-  suspend fun findAll(): List<Blog>
+  fun findAll(): Flow<List<Blog>>
 }