[Architecture] experiments to remove DI graph managements from navigation flow nodes

app/src/main/kotlin/io/element/android/x/MainNode.kt

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+/*
+ * 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.x
+
+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.navigation.model.permanent.PermanentNavModel
+import com.bumble.appyx.core.node.Node
+import com.bumble.appyx.core.node.ParentNode
+import io.element.android.libraries.architecture.bindings
+import io.element.android.libraries.architecture.createNode
+import io.element.android.libraries.di.DaggerComponentOwner
+import io.element.android.libraries.matrix.MatrixClient
+import io.element.android.libraries.matrix.room.MatrixRoom
+import io.element.android.x.di.MainDaggerComponentOwner
+import io.element.android.x.di.RoomComponent
+import io.element.android.x.di.SessionComponent
+import io.element.android.x.node.LoggedInFlowNode
+import io.element.android.x.node.RoomFlowNode
+import io.element.android.x.node.RootFlowNode
+
+class MainNode(
+    buildContext: BuildContext,
+    private val mainDaggerComponentOwner: MainDaggerComponentOwner,
+) :
+    ParentNode<MainNode.NavTarget>(
+        navModel = PermanentNavModel(
+            navTargets = setOf(NavTarget),
+            savedStateMap = buildContext.savedStateMap,
+        ),
+        buildContext = buildContext,
+    ),
+    DaggerComponentOwner by mainDaggerComponentOwner {
+
+    private val loggedInFlowNodeCallback = object : LoggedInFlowNode.LifecycleCallback {
+        override fun onFlowCreated(client: MatrixClient) {
+            val component = bindings<SessionComponent.ParentBindings>().sessionComponentBuilder().client(client).build()
+            mainDaggerComponentOwner.addComponent(client.sessionId.value, component)
+        }
+
+        override fun onFlowReleased(client: MatrixClient) {
+            mainDaggerComponentOwner.removeComponent(client.sessionId.value)
+        }
+    }
+
+    private val roomFlowNodeCallback = object : RoomFlowNode.LifecycleCallback {
+        override fun onFlowCreated(room: MatrixRoom) {
+            val component = bindings<RoomComponent.ParentBindings>().roomComponentBuilder().room(room).build()
+            mainDaggerComponentOwner.addComponent(room.roomId.value, component)
+        }
+
+        override fun onFlowReleased(room: MatrixRoom) {
+            mainDaggerComponentOwner.removeComponent(room.roomId.value)
+        }
+    }
+
+    override fun resolve(navTarget: NavTarget, buildContext: BuildContext): Node {
+        return createNode<RootFlowNode>(buildContext, plugins = listOf(loggedInFlowNodeCallback, roomFlowNodeCallback))
+    }
+
+    @Composable
+    override fun View(modifier: Modifier) {
+        Children(navModel = navModel)
+    }
+
+    object NavTarget
+}