Create root node

features/createroom/build.gradle.kts

@@ -20,6 +20,7 @@ plugins {
     id("io.element.android-compose-library")
     alias(libs.plugins.ksp)
     alias(libs.plugins.anvil)
+    id("kotlin-parcelize")
 }
 
 android {

features/createroom/src/main/kotlin/io/element/android/features/createroom/CreateRoomNode.kt

@@ -16,29 +16,48 @@
 
 package io.element.android.features.createroom
 
+import android.os.Parcelable
 import androidx.compose.runtime.Composable
 import androidx.compose.ui.Modifier
+import com.bumble.appyx.core.composable.Children
 import com.bumble.appyx.core.modality.BuildContext
 import com.bumble.appyx.core.node.Node
-import com.bumble.appyx.core.plugin.Plugin
-import dagger.assisted.Assisted
-import dagger.assisted.AssistedInject
-import io.element.android.anvilannotations.ContributesNode
-import io.element.android.libraries.di.SessionScope
+import com.bumble.appyx.core.node.ParentNode
+import com.bumble.appyx.navmodel.backstack.BackStack
+import io.element.android.features.createroom.root.CreateRoomRootNode
+import io.element.android.libraries.architecture.animation.rememberDefaultTransitionHandler
+import io.element.android.libraries.architecture.createNode
+import kotlinx.parcelize.Parcelize
 
-@ContributesNode(SessionScope::class)
-class CreateRoomNode @AssistedInject constructor(
-    @Assisted buildContext: BuildContext,
-    @Assisted plugins: List<Plugin>,
-    private val presenter: CreateRoomPresenter,
-) : Node(buildContext, plugins = plugins) {
+class CreateRoomNode(
+    buildContext: BuildContext,
+    private val backstack: BackStack<NavTarget> = BackStack(
+        initialElement = NavTarget.Root,
+        savedStateMap = buildContext.savedStateMap,
+    ),
+) : ParentNode<CreateRoomNode.NavTarget>(
+    navModel = backstack,
+    buildContext = buildContext
+) {
+
+    sealed interface NavTarget : Parcelable {
+        @Parcelize
+        object Root : NavTarget
+    }
+
+    override fun resolve(navTarget: NavTarget, buildContext: BuildContext): Node {
+        return when (navTarget) {
+            NavTarget.Root -> createNode<CreateRoomRootNode>(buildContext)
+        }
+    }
 
     @Composable
     override fun View(modifier: Modifier) {
-        val state = presenter.present()
-        CreateRoomView(
-            state = state,
-            modifier = modifier
+        Children(
+            navModel = backstack,
+            modifier = modifier,
+            // Animate transition to change server screen
+            transitionHandler = rememberDefaultTransitionHandler(),
         )
     }
 }

features/createroom/src/main/kotlin/io/element/android/features/createroom/root/CreateRoomRootEvents.kt

@@ -14,9 +14,9 @@
  * limitations under the License.
  */
 
-package io.element.android.features.createroom
+package io.element.android.features.createroom.root
 
 // TODO Add your events or remove the file completely if no events
-sealed interface CreateRoomEvents {
-    object MyEvent : CreateRoomEvents
+sealed interface CreateRoomRootEvents {
+    object MyEvent : CreateRoomRootEvents
 }

features/createroom/src/main/kotlin/io/element/android/features/createroom/root/CreateRoomRootNode.kt

@@ -0,0 +1,51 @@
+/*
+ * Copyright (c) 2023 New Vector Ltd
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package io.element.android.features.createroom.root
+
+import android.os.Parcelable
+import androidx.compose.runtime.Composable
+import androidx.compose.ui.Modifier
+import com.bumble.appyx.core.modality.BuildContext
+import com.bumble.appyx.core.node.Node
+import com.bumble.appyx.core.plugin.Plugin
+import dagger.assisted.Assisted
+import dagger.assisted.AssistedInject
+import io.element.android.anvilannotations.ContributesNode
+import io.element.android.libraries.di.SessionScope
+import kotlinx.parcelize.Parcelize
+
+@ContributesNode(SessionScope::class)
+class CreateRoomRootNode @AssistedInject constructor(
+    @Assisted buildContext: BuildContext,
+    @Assisted plugins: List<Plugin>,
+    private val presenter: CreateRoomRootPresenter,
+) : Node(buildContext, plugins = plugins) {
+
+    sealed interface NavTarget : Parcelable {
+        @Parcelize
+        object Root : NavTarget
+    }
+
+    @Composable
+    override fun View(modifier: Modifier) {
+        val state = presenter.present()
+        CreateRoomRootView(
+            state = state,
+            modifier = modifier
+        )
+    }
+}

features/createroom/src/main/kotlin/io/element/android/features/createroom/root/CreateRoomRootPresenter.kt

@@ -14,24 +14,24 @@
  * limitations under the License.
  */
 
-package io.element.android.features.createroom
+package io.element.android.features.createroom.root
 
 import androidx.compose.runtime.Composable
 import io.element.android.libraries.architecture.Presenter
 import javax.inject.Inject
 
-class CreateRoomPresenter @Inject constructor() : Presenter<CreateRoomState> {
+class CreateRoomRootPresenter @Inject constructor() : Presenter<CreateRoomRootState> {
 
     @Composable
-    override fun present(): CreateRoomState {
+    override fun present(): CreateRoomRootState {
 
-        fun handleEvents(event: CreateRoomEvents) {
+        fun handleEvents(event: CreateRoomRootEvents) {
             when (event) {
-                CreateRoomEvents.MyEvent -> Unit
+                CreateRoomRootEvents.MyEvent -> Unit
             }
         }
 
-        return CreateRoomState(
+        return CreateRoomRootState(
             eventSink = ::handleEvents
         )
     }

features/createroom/src/main/kotlin/io/element/android/features/createroom/root/CreateRoomRootState.kt

@@ -14,10 +14,10 @@
  * limitations under the License.
  */
 
-package io.element.android.features.createroom
+package io.element.android.features.createroom.root
 
 // TODO add your ui models. Remove the eventSink if you don't have events.
 // Do not use default value, so no member get forgotten in the presenters.
-data class CreateRoomState(
-    val eventSink: (CreateRoomEvents) -> Unit
+data class CreateRoomRootState(
+    val eventSink: (CreateRoomRootEvents) -> Unit
 )

features/createroom/src/main/kotlin/io/element/android/features/createroom/root/CreateRoomRootStateProvider.kt

@@ -14,18 +14,18 @@
  * limitations under the License.
  */
 
-package io.element.android.features.createroom
+package io.element.android.features.createroom.root
 
 import androidx.compose.ui.tooling.preview.PreviewParameterProvider
 
-open class CreateRoomStateProvider : PreviewParameterProvider<CreateRoomState> {
-    override val values: Sequence<CreateRoomState>
+open class CreateRoomRootStateProvider : PreviewParameterProvider<CreateRoomRootState> {
+    override val values: Sequence<CreateRoomRootState>
         get() = sequenceOf(
-            aCreateRoomState(),
+            aCreateRoomRootState(),
             // Add other state here
         )
 }
 
-fun aCreateRoomState() = CreateRoomState(
+fun aCreateRoomRootState() = CreateRoomRootState(
     eventSink = {}
 )

features/createroom/src/main/kotlin/io/element/android/features/createroom/root/CreateRoomRootView.kt

@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-package io.element.android.features.createroom
+package io.element.android.features.createroom.root
 
 import androidx.compose.foundation.layout.Box
 import androidx.compose.material3.MaterialTheme
@@ -28,8 +28,8 @@ import io.element.android.libraries.designsystem.preview.ElementPreviewLight
 import io.element.android.libraries.designsystem.theme.components.Text
 
 @Composable
-fun CreateRoomView(
-    state: CreateRoomState,
+fun CreateRoomRootView(
+    state: CreateRoomRootState,
     modifier: Modifier = Modifier,
 ) {
     Box(modifier, contentAlignment = Alignment.Center) {
@@ -42,17 +42,17 @@ fun CreateRoomView(
 
 @Preview
 @Composable
-fun CreateRoomViewLightPreview(@PreviewParameter(CreateRoomStateProvider::class) state: CreateRoomState) =
+fun CreateRoomRootViewLightPreview(@PreviewParameter(CreateRoomRootStateProvider::class) state: CreateRoomRootState) =
     ElementPreviewLight { ContentToPreview(state) }
 
 @Preview
 @Composable
-fun CreateRoomViewDarkPreview(@PreviewParameter(CreateRoomStateProvider::class) state: CreateRoomState) =
+fun CreateRoomRootViewDarkPreview(@PreviewParameter(CreateRoomRootStateProvider::class) state: CreateRoomRootState) =
     ElementPreviewDark { ContentToPreview(state) }
 
 @Composable
-private fun ContentToPreview(state: CreateRoomState) {
-    CreateRoomView(
+private fun ContentToPreview(state: CreateRoomRootState) {
+    CreateRoomRootView(
         state = state,
     )
 }

features/createroom/src/test/kotlin/io/element/android/features/createroom/root/CreateRoomRootPresenterTests.kt

@@ -16,7 +16,7 @@
 
 @file:OptIn(ExperimentalCoroutinesApi::class)
 
-package io.element.android.features.createroom
+package io.element.android.features.createroom.root
 
 import app.cash.molecule.RecompositionClock
 import app.cash.molecule.moleculeFlow
@@ -26,11 +26,11 @@ import kotlinx.coroutines.ExperimentalCoroutinesApi
 import kotlinx.coroutines.test.runTest
 import org.junit.Test
 
-class CreateRoomPresenterTests {
+class CreateRoomRootPresenterTests {
 
     @Test
     fun `present - initial state`() = runTest {
-        val presenter = CreateRoomPresenter()
+        val presenter = CreateRoomRootPresenter()
         moleculeFlow(RecompositionClock.Immediate) {
             presenter.present()
         }.test {
@@ -41,12 +41,12 @@ class CreateRoomPresenterTests {
 
     @Test
     fun `present - send event`() = runTest {
-        val presenter = CreateRoomPresenter()
+        val presenter = CreateRoomRootPresenter()
         moleculeFlow(RecompositionClock.Immediate) {
             presenter.present()
         }.test {
             val initialState = awaitItem()
-            initialState.eventSink.invoke(CreateRoomEvents.MyEvent)
+            initialState.eventSink.invoke(CreateRoomRootEvents.MyEvent)
         }
     }
 }