User domain logic

data/src/main/java/com/ericampire/android/androidstudycase/data/datasource/user/LocalUserDataSource.kt

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+package com.ericampire.android.androidstudycase.data.datasource.user
+
+import com.ericampire.android.androidstudycase.data.room.UserDao
+import com.ericampire.android.androidstudycase.domain.entity.User
+import com.ericampire.android.androidstudycase.util.Result
+import kotlinx.coroutines.flow.Flow
+import kotlinx.coroutines.flow.map
+import javax.inject.Inject
+
+class LocalUserDataSource @Inject constructor(
+  private val dao: UserDao
+) : UserDataSource {
+  override suspend fun save(user: User) {
+    dao.save(user)
+  }
+
+  override fun findAll(): Flow<Result<List<User>>> {
+    return dao.findAll().map {
+      Result.Success(it)
+    }
+  }
+}

data/src/main/java/com/ericampire/android/androidstudycase/data/datasource/user/UserDataSource.kt

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+package com.ericampire.android.androidstudycase.data.datasource.user
+
+import com.ericampire.android.androidstudycase.domain.entity.User
+import com.ericampire.android.androidstudycase.util.Result
+import kotlinx.coroutines.flow.Flow
+
+interface UserDataSource {
+  suspend fun save(user: User)
+  fun findAll(): Flow<Result<List<User>>>
+}

data/src/main/java/com/ericampire/android/androidstudycase/data/repository/UserRepositoryImpl.kt

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+package com.ericampire.android.androidstudycase.data.repository
+
+import com.ericampire.android.androidstudycase.data.datasource.user.UserDataSource
+import com.ericampire.android.androidstudycase.domain.entity.User
+import com.ericampire.android.androidstudycase.domain.repository.UserRepository
+import com.ericampire.android.androidstudycase.util.Result
+import kotlinx.coroutines.flow.Flow
+import javax.inject.Inject
+
+class UserRepositoryImpl @Inject constructor(
+  private val localDataSource: UserDataSource
+) : UserRepository {
+  override suspend fun save(user: User) {
+    return localDataSource.save(user)
+  }
+
+  override fun findAll(): Flow<Result<List<User>>> {
+    return localDataSource.findAll()
+  }
+}

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

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+package com.ericampire.android.androidstudycase.data.room
+
+import androidx.room.Dao
+import androidx.room.Insert
+import androidx.room.Query
+import com.ericampire.android.androidstudycase.domain.entity.User
+import kotlinx.coroutines.flow.Flow
+
+@Dao
+interface UserDao {
+
+  @Insert
+  fun save(user: User)
+
+  @Query("SELECT * FROM User")
+  fun findAll(): Flow<List<User>>
+}

domain/src/main/java/com/ericampire/android/androidstudycase/domain/entity/User.kt

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+package com.ericampire.android.androidstudycase.domain.entity
+
+import androidx.room.Entity
+import androidx.room.PrimaryKey
+
+@Entity
+data class User(
+  @PrimaryKey
+  val id: Long? = null,
+  val displayName: String,
+  val imageUrl: String,
+)

domain/src/main/java/com/ericampire/android/androidstudycase/domain/repository/UserRepository.kt

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+package com.ericampire.android.androidstudycase.domain.repository
+
+import com.ericampire.android.androidstudycase.domain.entity.User
+import com.ericampire.android.androidstudycase.util.Result
+import kotlinx.coroutines.flow.Flow
+
+interface UserRepository {
+  suspend fun save(user: User)
+  fun findAll(): Flow<Result<List<User>>>
+}

domain/src/test/java/com/ericampire/android/androidstudycase/domain/usecase/FindUsersUseCaseTest.kt

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+package com.ericampire.android.androidstudycase.domain.usecase
+
+internal class FindUsersUseCaseTest