implement favorite view

app/src/main/java/com/hako/friendlists/view/MainActivity.kt

@@ -4,18 +4,21 @@ import android.os.Bundle
 import androidx.appcompat.app.AppCompatActivity
 import androidx.navigation.findNavController
 import androidx.navigation.ui.NavigationUI.setupActionBarWithNavController
-import com.hako.base.extensions.observeNonNull
+import com.hako.base.extensions.*
 import com.hako.base.navigation.NavigationRouter
+import com.hako.base.navigation.ShowFabButton
 import com.hako.friendlists.BuildConfig
 import com.hako.friendlists.R
 import com.hako.friendlists.viewmodel.NavigationViewmodel
 import com.squareup.picasso.Picasso
+import kotlinx.android.synthetic.main.activity_main.*
 import org.koin.android.ext.android.inject
 import org.koin.androidx.viewmodel.ext.android.viewModel
 
 class MainActivity : AppCompatActivity() {
 
     private val navController by lazy { findNavController(R.id.main_fragment_container) }
+    private val navHostFragment by lazy { findNavHostFragment(R.id.main_fragment_container) }
     private val navRouter: NavigationRouter by inject()
     private val picasso: Picasso by inject()
     private val viewModel: NavigationViewmodel by viewModel()
@@ -39,6 +42,28 @@ class MainActivity : AppCompatActivity() {
         }
 
         setupActionBarWithNavController(this, navController)
+
+        navHostFragment.registerOnFragmentViewCreated { currentFragment ->
+            initializeViews()
+            when (currentFragment) {
+                is ShowFabButton -> fabButtonBehaviour(currentFragment)
+            }
+        }
+    }
+
+    private fun initializeViews() {
+        main_fragment_fab.hide()
+    }
+
+    private fun fabButtonBehaviour(currentFragment: ShowFabButton) {
+        main_fragment_fab.setOnClickListener {
+            currentFragment.fabButtonPressed().invoke()
+        }
+        if (currentFragment.shouldShowFabButton()) {
+            main_fragment_fab.show()
+        } else {
+            main_fragment_fab.hide()
+        }
     }
 
     private fun setupPicasso() {

app/src/main/java/com/hako/friendlists/viewmodel/NavigationViewmodel.kt

@@ -35,6 +35,9 @@ class NavigationViewmodel : ViewModel() {
                     putString(FRAGMENT_TITLE, event.userName)
                 })
             )
+            is UserlistNavigation.ClickedOnFab -> navigate.postValue(
+                buildNavigation(R.id.action_userlistFragment_to_favoriteUserlistFragment)
+            )
         }
     }
 

app/src/main/res/layout/activity_main.xml

@@ -15,4 +15,14 @@
         app:layout_constraintStart_toStartOf="parent"
         app:layout_constraintTop_toTopOf="parent" />
 
+    <com.google.android.material.floatingactionbutton.FloatingActionButton
+        android:id="@+id/main_fragment_fab"
+        android:layout_width="wrap_content"
+        android:layout_height="wrap_content"
+        android:layout_gravity="end|bottom"
+        android:layout_margin="24dp"
+        android:src="@drawable/ic_heart"
+        app:layout_constraintBottom_toBottomOf="parent"
+        app:layout_constraintEnd_toEndOf="parent" />
+
 </androidx.constraintlayout.widget.ConstraintLayout>

app/src/main/res/values/colors.xml

@@ -2,7 +2,7 @@
 <resources>
     <color name="colorPrimary">#37474F</color>
     <color name="colorPrimaryDark">#324047</color>
-    <color name="colorAccent">#CBCFD1</color>
+    <color name="colorAccent">#D32F2F</color>
     <color name="colorRed">#D32F2F</color>
     <color name="colorDarkGray">#333333</color>
 </resources>

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

@@ -1,6 +1,32 @@
 package com.hako.base.extensions
 
 import android.os.Bundle
+import android.view.View
 import androidx.annotation.IdRes
+import androidx.appcompat.app.AppCompatActivity
+import androidx.fragment.app.Fragment
+import androidx.fragment.app.FragmentManager
+import androidx.navigation.fragment.NavHostFragment
+
+fun AppCompatActivity.findNavHostFragment(@IdRes id: Int) =
+    supportFragmentManager.findFragmentById(id) as NavHostFragment
+
+fun NavHostFragment.registerOnFragmentViewCreated(
+    recursive: Boolean = true,
+    listener: (currentFragment: Fragment) -> Unit
+) {
+    childFragmentManager
+        .registerFragmentLifecycleCallbacks(object : FragmentManager.FragmentLifecycleCallbacks() {
+            override fun onFragmentViewCreated(
+                fm: FragmentManager,
+                f: Fragment,
+                v: View,
+                savedInstanceState: Bundle?
+            ) {
+                super.onFragmentViewCreated(fm, f, v, savedInstanceState)
+                listener(f)
+            }
+        }, recursive)
+}
 
 fun buildNavigation(@IdRes id: Int, bundle: Bundle = Bundle()) = Pair(id, bundle)

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

@@ -1,3 +1,7 @@
 package com.hako.base.navigation
 
-interface ShowFabButton
+interface ShowFabButton {
+    fun shouldShowFabButton(): Boolean
+
+    fun fabButtonPressed(): () -> Unit = {}
+}

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

@@ -1,15 +1,8 @@
 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) {
 

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

@@ -0,0 +1,9 @@
+package com.hako.userlist.feature
+
+class FavoriteUserlistFragment : UserlistFragment() {
+    override fun doRequest() {
+        viewModel.fetchFavoriteUsers()
+    }
+
+    override fun shouldShowFabButton() = false
+}

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

@@ -9,7 +9,6 @@ import androidx.recyclerview.widget.LinearLayoutManager
 import com.hako.base.domain.network.RequestStatus
 import com.hako.base.extensions.gone
 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
@@ -23,11 +22,9 @@ import org.koin.android.ext.android.inject
 import org.koin.androidx.viewmodel.ext.android.viewModel
 import timber.log.Timber
 
-const val ALBUMLIST_FRAGMENT_BUNDLE_FAVORITES = "ALBUMLIST_FRAGMENT_BUNDLE_FAVORITES"
+open class UserlistFragment : Fragment(), ShowFabButton {
 
-class UserlistFragment : Fragment(), ShowFabButton {
-
-    private val viewModel: UserlistViewmodel by viewModel()
+    val viewModel: UserlistViewmodel by viewModel()
     private val listAdapter by lazy { UserlistAdapter() }
     private val navigation: NavigationRouter by inject()
 
@@ -39,9 +36,19 @@ class UserlistFragment : Fragment(), ShowFabButton {
         super.onViewCreated(view, savedInstanceState)
         setRecycler()
         setObservers()
+        doRequest()
+    }
+
+    open fun doRequest() {
         viewModel.fetchUsers()
     }
 
+    override fun shouldShowFabButton() = true
+
+    override fun fabButtonPressed(): () -> Unit = {
+        navigation.sendNavigation(UserlistNavigation.ClickedOnFab)
+    }
+
     private fun setObservers() {
         viewModel.userList.observeNonNull(this) {
             it.either(::handleFetchError, ::handleFetchSuccess)

userlist/src/main/java/com/hako/userlist/navigation/UserlistNavigation.kt

@@ -4,4 +4,5 @@ import com.hako.base.navigation.NavigationEvent
 
 sealed class UserlistNavigation : NavigationEvent {
     data class ClickedOnUser(val userId: Int, val userName: String) : UserlistNavigation()
+    object ClickedOnFab : UserlistNavigation()
 }

userlist/src/main/res/navigation/userlist_navigation.xml

@@ -9,6 +9,20 @@
         android:id="@+id/userlistFragment"
         android:name="com.hako.userlist.feature.UserlistFragment"
         tools:layout="@layout/fragment_userlist"
-        android:label="Friendlist" />
+        android:label="Friendlist" >
+        <action
+            android:id="@+id/action_userlistFragment_to_favoriteUserlistFragment"
+            app:destination="@id/favoriteUserlistFragment"
+            app:enterAnim="@anim/slide_in_right"
+            app:exitAnim="@anim/slide_out_left"
+            app:popEnterAnim="@anim/slide_in_left"
+            app:popExitAnim="@anim/slide_out_right"/>
+    </fragment>
+
+    <fragment
+        android:id="@+id/favoriteUserlistFragment"
+        android:name="com.hako.userlist.feature.FavoriteUserlistFragment"
+        tools:layout="@layout/fragment_userlist"
+        android:label="Favoritos" />
 
 </navigation>