implement favorite button

app/src/main/AndroidManifest.xml

@@ -11,7 +11,8 @@
         android:label="@string/app_name"
         android:roundIcon="@mipmap/ic_launcher_round"
         android:supportsRtl="false"
-        android:theme="@style/AppTheme">
+        android:theme="@style/AppTheme"
+        android:hardwareAccelerated="true">
 
         <activity
             android:name=".view.MainActivity"

base/src/main/java/com/hako/base/domain/database/dao/UserDao.kt

@@ -15,12 +15,18 @@ interface UserDao {
     @Insert(onConflict = OnConflictStrategy.REPLACE)
     fun saveAll(entities: List<UserEntity>)
 
+    @Query("UPDATE ${UserEntity.TABLE_NAME} SET isFavorite = :favorite WHERE id = :id")
+    fun saveFavorite(id: Int, favorite: Boolean): Int
+
     @get:Query("SELECT * FROM ${UserEntity.TABLE_NAME}")
     val all: List<UserEntity>
 
-    @Query("SELECT * FROM ${UserEntity.TABLE_NAME}")
+    @Query("SELECT * FROM ${UserEntity.TABLE_NAME} ORDER BY id ASC")
     fun getAllUsers(): List<UserEntity>
 
+    @Query("SELECT * FROM ${UserEntity.TABLE_NAME} WHERE isFavorite = 1 ORDER BY id ASC")
+    fun getFavoriteUsers(): List<UserEntity>
+
     @Query("SELECT COUNT(*) FROM ${UserEntity.TABLE_NAME}")
     fun count(): Int
 

base/src/main/java/com/hako/base/domain/database/entities/User.kt

@@ -12,7 +12,8 @@ data class UserEntity(
     val userName: String,
     val email: String,
     val phone: String,
-    val website: String
+    val website: String,
+    val isFavorite: Boolean = true
 ) {
     companion object {
         const val TABLE_NAME = "users"

base/src/main/java/com/hako/base/domain/network/RequestStatus.kt

@@ -4,4 +4,5 @@ sealed class RequestStatus {
     object Ready : RequestStatus()
     object Loading : RequestStatus()
     object Errored : RequestStatus()
+    object Empty : RequestStatus()
 }

base/src/main/java/com/hako/base/extensions/DataExtensions.kt

@@ -11,3 +11,5 @@ fun <T> LiveData<T>.observeNonNull(owner: LifecycleOwner, func: (T) -> Unit) {
         }
     })
 }
+
+fun Int.wasUpdated() = this > 0

base/src/main/java/com/hako/base/navigation/ShowFabButton.kt

@@ -0,0 +1,3 @@
+package com.hako.base.navigation
+
+interface ShowFabButton

base/src/main/java/com/hako/base/widgets/EmptyOverlay.kt

@@ -0,0 +1,23 @@
+package com.hako.base.widgets
+
+import android.content.Context
+import android.util.AttributeSet
+import android.widget.FrameLayout
+import com.hako.base.R
+import com.hako.base.extensions.inflate
+import kotlinx.android.synthetic.main.empty_overlay.view.*
+
+class EmptyOverlay @JvmOverloads constructor(
+    context: Context,
+    attrs: AttributeSet? = null,
+    defStyleAttr: Int = 0
+) : FrameLayout(context, attrs, defStyleAttr) {
+
+    init {
+        inflate(R.layout.empty_overlay, true)
+    }
+
+    fun setLabel(message: String) {
+        empty_overlay_label.text = message
+    }
+}

base/src/main/java/com/hako/base/widgets/LikeButton.kt

@@ -10,7 +10,7 @@ import kotlinx.android.synthetic.main.like_button.view.*
 private const val LIKE_MIN_FRAME = 0
 private const val LIKE_MAX_FRAME = 28
 private const val LIKE_ANIM_SPEED = 1f
-private const val DISLIKE_MIN_FRAME = 28
+private const val DISLIKE_MIN_FRAME = 29
 private const val DISLIKE_MAX_FRAME = 70
 private const val DISLIKE_ANIM_SPEED = 2f
 
@@ -29,16 +29,24 @@ class LikeButton @JvmOverloads constructor(
     }
 
     fun dislike() {
-        like_button_animation_view.frame = LIKE_MIN_FRAME
+        like_button_animation_view.frame = DISLIKE_MAX_FRAME
     }
 
-    fun playLike() {
+    fun play() {
+        if (like_button_animation_view.frame <= LIKE_MAX_FRAME){
+            playDislike()
+        } else {
+            playLike()
+        }
+    }
+
+    private fun playLike() {
         like_button_animation_view.setMinAndMaxFrame(LIKE_MIN_FRAME, LIKE_MAX_FRAME)
         like_button_animation_view.speed = LIKE_ANIM_SPEED
         like_button_animation_view.playAnimation()
     }
 
-    fun playDislike() {
+    private fun playDislike() {
         like_button_animation_view.setMinAndMaxFrame(DISLIKE_MIN_FRAME, DISLIKE_MAX_FRAME)
         like_button_animation_view.speed = DISLIKE_ANIM_SPEED
         like_button_animation_view.playAnimation()

base/src/main/res/layout/empty_overlay.xml

@@ -0,0 +1,33 @@
+<?xml version="1.0" encoding="utf-8"?>
+<androidx.constraintlayout.widget.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
+    android:layout_width="match_parent"
+    android:layout_height="match_parent"
+    xmlns:app="http://schemas.android.com/apk/res-auto"
+    android:background="@color/soft_background">
+
+    <com.airbnb.lottie.LottieAnimationView
+        android:id="@+id/empty_overlay_animation_view"
+        android:layout_width="200dp"
+        android:layout_height="200dp"
+        android:scaleType="centerCrop"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent"
+        app:layout_constraintVertical_bias="0.39"
+        app:lottie_autoPlay="true"
+        app:lottie_loop="true"
+        app:lottie_rawRes="@raw/empty_animation" />
+
+    <TextView
+        android:id="@+id/empty_overlay_label"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_marginTop="16dp"
+        android:text="No tienes favoritos!"
+        android:textSize="24sp"
+        app:layout_constraintEnd_toEndOf="@+id/empty_overlay_animation_view"
+        app:layout_constraintStart_toStartOf="@+id/empty_overlay_animation_view"
+        app:layout_constraintTop_toBottomOf="@+id/empty_overlay_animation_view" />
+
+</androidx.constraintlayout.widget.ConstraintLayout>

base/src/main/res/layout/network_error_overlay.xml

@@ -6,7 +6,7 @@
     android:background="@color/soft_background">
 
     <com.airbnb.lottie.LottieAnimationView
-        android:id="@+id/loading_overlay_animation_view"
+        android:id="@+id/network_error_overlay_animation_view"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:scaleType="centerInside"
@@ -20,14 +20,14 @@
         app:lottie_rawRes="@raw/network_animation" />
 
     <TextView
-        android:id="@+id/textView"
+        android:id="@+id/network_error_overlay_label"
         android:layout_width="wrap_content"
         android:layout_height="wrap_content"
         android:layout_marginTop="16dp"
         android:text="Network error!"
         android:textSize="24sp"
-        app:layout_constraintEnd_toEndOf="@+id/loading_overlay_animation_view"
-        app:layout_constraintStart_toStartOf="@+id/loading_overlay_animation_view"
-        app:layout_constraintTop_toBottomOf="@+id/loading_overlay_animation_view" />
+        app:layout_constraintEnd_toEndOf="@+id/network_error_overlay_animation_view"
+        app:layout_constraintStart_toStartOf="@+id/network_error_overlay_animation_view"
+        app:layout_constraintTop_toBottomOf="@+id/network_error_overlay_animation_view" />
 
 </androidx.constraintlayout.widget.ConstraintLayout>

userlist/src/main/java/com/hako/userlist/di/UserlistModules.kt

@@ -2,7 +2,9 @@ package com.hako.userlist.di
 
 import com.hako.base.domain.network.RemoteClient
 import com.hako.userlist.domain.datasource.UserlistRemoteApi
+import com.hako.userlist.domain.usecase.GetFavoriteUsers
 import com.hako.userlist.domain.usecase.GetUsers
+import com.hako.userlist.domain.usecase.SetFavoriteStatus
 import com.hako.userlist.viewmodel.UserlistViewmodel
 import org.koin.androidx.viewmodel.dsl.viewModel
 import org.koin.dsl.module
@@ -10,6 +12,8 @@ import org.koin.dsl.module
 val userlistModules = module {
     factory { get<RemoteClient>().getClient(UserlistRemoteApi::class.java) }
     factory { GetUsers(get()) }
+    factory { GetFavoriteUsers(get()) }
+    factory { SetFavoriteStatus(get()) }
 
     viewModel { UserlistViewmodel() }
 }

userlist/src/main/java/com/hako/userlist/domain/usecase/GetFavoriteUsers.kt

@@ -0,0 +1,29 @@
+package com.hako.userlist.domain.usecase
+
+import com.hako.base.domain.database.dao.UserDao
+import com.hako.userlist.model.UserViewable
+import com.hako.userlist.model.toUserViewable
+import io.reactivex.Single
+import io.reactivex.schedulers.Schedulers
+
+class GetFavoriteUsers(private val dao: UserDao) {
+
+    fun execute(
+        onSuccess: (List<UserViewable>) -> Unit,
+        onEmpty: () -> Unit,
+        onError: (Throwable) -> Unit
+    ) {
+        Single.fromCallable { dao.getFavoriteUsers() }
+            .subscribeOn(Schedulers.io())
+            .doOnSuccess { dbUsers ->
+                if (dbUsers.isEmpty()) {
+                    onEmpty()
+                } else {
+                    onSuccess(dbUsers.map { it.toUserViewable() })
+                }
+            }
+            .doOnError { onError(it) }
+            .onErrorReturn { emptyList() }
+            .subscribe()
+    }
+}

userlist/src/main/java/com/hako/userlist/domain/usecase/GetUsers.kt

@@ -17,7 +17,8 @@ class GetUsers(private val dao: UserDao) : KoinComponent {
     fun execute(
         onSuccess: (List<UserViewable>) -> Unit,
         onError: (Throwable) -> Unit,
-        onLoading: () -> Unit
+        onLoading: () -> Unit,
+        onEmpty: () -> Unit
     ) {
         Single.fromCallable { dao.getAllUsers() }
             .subscribeOn(Schedulers.io())
@@ -26,8 +27,12 @@ class GetUsers(private val dao: UserDao) : KoinComponent {
                 if (dbUsers.isEmpty()) {
                     api.getUsers()
                         .doOnSuccess {
-                            dao.saveAll(it.map { user -> user.toUserEntity() })
-                            onSuccess(dao.getAllUsers().map { user -> user.toUserViewable() })
+                            if (it.isEmpty()) {
+                                onEmpty()
+                            } else {
+                                dao.saveAll(it.map { user -> user.toUserEntity() })
+                                onSuccess(dao.getAllUsers().map { user -> user.toUserViewable() })
+                            }
                         }
                         .doOnSubscribe { onLoading() }
                         .subscribeOn(Schedulers.io())

userlist/src/main/java/com/hako/userlist/domain/usecase/SetFavoriteStatus.kt

@@ -0,0 +1,26 @@
+package com.hako.userlist.domain.usecase
+
+import com.hako.base.domain.database.dao.UserDao
+import com.hako.base.extensions.wasUpdated
+import com.hako.userlist.domain.datasource.UserlistRemoteApi
+import com.hako.userlist.model.UserViewable
+import com.hako.userlist.model.toUserEntity
+import com.hako.userlist.model.toUserViewable
+import io.reactivex.Single
+import io.reactivex.schedulers.Schedulers
+import org.koin.core.KoinComponent
+import org.koin.core.get
+
+class SetFavoriteStatus(private val dao: UserDao) {
+
+    fun execute(
+        userId: Int,
+        favoriteStatus: Boolean,
+        onError: (userId: Int) -> Unit
+    ) {
+        Single.fromCallable { dao.saveFavorite(userId, favoriteStatus) }
+            .subscribeOn(Schedulers.io())
+            .doOnError { onError(userId) }
+            .subscribe()
+    }
+}

userlist/src/main/java/com/hako/userlist/feature/UserlistFragment.kt

@@ -12,6 +12,7 @@ import com.hako.base.extensions.observeNonNull
 import com.hako.base.extensions.toast
 import com.hako.base.extensions.visible
 import com.hako.base.navigation.NavigationRouter
+import com.hako.base.navigation.ShowFabButton
 import com.hako.userlist.model.UserViewable
 import com.hako.userlist.viewmodel.UserlistViewmodel
 import com.hako.userlist.widget.UserlistAdapter
@@ -22,7 +23,9 @@ import org.koin.android.ext.android.inject
 import org.koin.androidx.viewmodel.ext.android.viewModel
 import timber.log.Timber
 
-class UserlistFragment : Fragment() {
+const val ALBUMLIST_FRAGMENT_BUNDLE_FAVORITES = "ALBUMLIST_FRAGMENT_BUNDLE_FAVORITES"
+
+class UserlistFragment : Fragment(), ShowFabButton {
 
     private val viewModel: UserlistViewmodel by viewModel()
     private val listAdapter by lazy { UserlistAdapter() }
@@ -40,7 +43,7 @@ class UserlistFragment : Fragment() {
     }
 
     private fun setObservers() {
-        viewModel.data.observeNonNull(this) {
+        viewModel.userList.observeNonNull(this) {
             it.either(::handleFetchError, ::handleFetchSuccess)
         }
 
@@ -49,17 +52,29 @@ class UserlistFragment : Fragment() {
                 RequestStatus.Ready -> {
                     fragment_userlist_error_overlay.gone()
                     fragment_userlist_loading_overlay.gone()
+                    fragment_userlist_empty_overlay.gone()
                 }
                 RequestStatus.Loading -> {
                     fragment_userlist_error_overlay.gone()
                     fragment_userlist_loading_overlay.visible()
+                    fragment_userlist_empty_overlay.gone()
                 }
                 RequestStatus.Errored -> {
                     fragment_userlist_error_overlay.visible()
                     fragment_userlist_loading_overlay.gone()
+                    fragment_userlist_empty_overlay.gone()
+                }
+                RequestStatus.Empty -> {
+                    fragment_userlist_error_overlay.gone()
+                    fragment_userlist_loading_overlay.gone()
+                    fragment_userlist_empty_overlay.visible()
                 }
             }
         }
+
+        viewModel.emptyMessage.observeNonNull(this) {
+            fragment_userlist_empty_overlay.setLabel(it)
+        }
     }
 
     private fun handleFetchError(throwable: Throwable) {
@@ -79,7 +94,7 @@ class UserlistFragment : Fragment() {
                 }
 
                 onFavoriteClick = {
-                    context.toast(it.userName)
+                    viewModel.updateUserFavoriteStatus(it.id, !it.isFavorite)
                 }
             }
         }

userlist/src/main/java/com/hako/userlist/model/UserModels.kt

@@ -19,10 +19,10 @@ data class UserViewable(
     val id: Int,
     val realName: String,
     val userName: String,
-    var isFavorite: Boolean = false
+    var isFavorite: Boolean
 )
 
 fun User.toUserEntity() = UserEntity(this.id, this.realName, this.userName, this.email, this.phone, this.website)
 
-fun UserEntity.toUserViewable() = UserViewable(this.id, this.realName, this.userName)
+fun UserEntity.toUserViewable() = UserViewable(this.id, this.realName, this.userName, this.isFavorite)
 

userlist/src/main/java/com/hako/userlist/viewmodel/UserlistViewmodel.kt

@@ -3,34 +3,65 @@ package com.hako.userlist.viewmodel
 import androidx.lifecycle.MutableLiveData
 import androidx.lifecycle.ViewModel
 import com.hako.base.domain.network.RequestStatus
-import com.hako.base.domain.network.RequestStatus.Ready
-import com.hako.base.domain.network.RequestStatus.Loading
-import com.hako.base.domain.network.RequestStatus.Errored
 import com.hako.base.domain.Either
+import com.hako.base.domain.network.RequestStatus.*
+import com.hako.userlist.domain.usecase.GetFavoriteUsers
 import com.hako.userlist.domain.usecase.GetUsers
+import com.hako.userlist.domain.usecase.SetFavoriteStatus
 import com.hako.userlist.model.UserViewable
 import org.koin.core.KoinComponent
 import org.koin.core.get
 
 class UserlistViewmodel : ViewModel(), KoinComponent {
 
-    val data = MutableLiveData<Either<Throwable, List<UserViewable>>>()
+    val userList = MutableLiveData<Either<Throwable, List<UserViewable>>>()
+    val favoriteError = MutableLiveData<Int>()
+    val emptyMessage = MutableLiveData<String>()
     val requestStatus = MutableLiveData<RequestStatus>()
 
     private val getUsers: GetUsers = get()
+    private val getFavoriteUsers: GetFavoriteUsers = get()
+    private val setFavoriteStatus: SetFavoriteStatus = get()
 
     fun fetchUsers() {
         getUsers.execute(
             onSuccess = {
                 requestStatus.postValue(Ready)
-                data.postValue(Either.Right(it))
+                userList.postValue(Either.Right(it))
             },
             onLoading = {
                 requestStatus.postValue(Loading)
             },
             onError = {
                 requestStatus.postValue(Errored)
-                data.postValue(Either.Left(it))
+                userList.postValue(Either.Left(it))
+            },
+            onEmpty = {
+                requestStatus.postValue(Empty)
+                emptyMessage.postValue("No se encontró ningún usuario")
+            })
+    }
+
+    fun fetchFavoriteUsers() {
+        getFavoriteUsers.execute(
+            onSuccess = {
+                requestStatus.postValue(Ready)
+                userList.postValue(Either.Right(it))
+            },
+            onError = {
+                requestStatus.postValue(Errored)
+                userList.postValue(Either.Left(it))
+            },
+            onEmpty = {
+                requestStatus.postValue(Empty)
+                emptyMessage.postValue("No tienes favoritos!")
+            })
+    }
+
+    fun updateUserFavoriteStatus(userId: Int, status: Boolean) {
+        setFavoriteStatus.execute(userId, status,
+            onError = {
+                favoriteError.postValue(it)
             })
     }
 }

userlist/src/main/java/com/hako/userlist/widget/UserlistAdapter.kt

@@ -44,18 +44,26 @@ class UserlistAdapter : RecyclerView.Adapter<RecyclerView.ViewHolder>() {
         }
 }
 
-class UserViewHolder(private val view: View,
-                     private val onItemClick: (UserViewable) -> Unit,
-                     private val onFavoriteClick: (UserViewable) -> Unit) :
+class UserViewHolder(
+    private val view: View,
+    private val onItemClick: (UserViewable) -> Unit,
+    private val onFavoriteClick: (UserViewable) -> Unit
+) :
     RecyclerView.ViewHolder(view) {
 
     fun bind(user: UserViewable) = with(view) {
         item_user_card_real_name.text = user.realName
         item_user_card_user_name.text = user.userName
+        if (user.isFavorite) {
+            item_user_card_like_button.like()
+        } else {
+            item_user_card_like_button.dislike()
+        }
         item_user_card_container.setOnClickListener {
             onItemClick(user)
         }
         item_user_card_like_button.setOnClickListener {
+            item_user_card_like_button.play()
             onFavoriteClick(user)
         }
     }

userlist/src/main/res/layout/fragment_userlist.xml

@@ -35,4 +35,14 @@
         app:layout_constraintStart_toStartOf="parent"
         app:layout_constraintTop_toTopOf="parent" />
 
+    <com.hako.base.widgets.EmptyOverlay
+        android:id="@+id/fragment_userlist_empty_overlay"
+        android:layout_width="match_parent"
+        android:layout_height="match_parent"
+        android:visibility="gone"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent"
+        app:layout_constraintStart_toStartOf="parent"
+        app:layout_constraintTop_toTopOf="parent" />
+
 </androidx.constraintlayout.widget.ConstraintLayout>