[flexiglass] Container config - domain layer.

The container configuration portion of the Flexiglass framework allows
OEMs to configure one or more Flexiglass containers with scenes. Each scene is a distinct bit of UI content that the
user can navigate to (for example by swiping in a direction) or that can
be navigated to automatically through the SceneInteractor methods.

Bug: 279501596
Test: Included unit tests. Manually tested through a testbed app that
uses Jetpack Compose to implement a simple UI to traverse all scenes.

Change-Id: I28708a55963ae79d48e91f2dcef06eeadea167c4

packages/SystemUI/src/com/android/systemui/scene/domain/interactor/SceneInteractor.kt

@@ -0,0 +1,73 @@
+/*
+ * Copyright (C) 2023 The Android Open Source Project
+ *
+ * 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 com.android.systemui.scene.domain.interactor
+
+import com.android.systemui.dagger.SysUISingleton
+import com.android.systemui.scene.data.repository.SceneContainerRepository
+import com.android.systemui.scene.shared.model.SceneKey
+import com.android.systemui.scene.shared.model.SceneModel
+import javax.inject.Inject
+import kotlinx.coroutines.flow.StateFlow
+
+/** Business logic and app state accessors for the scene framework. */
+@SysUISingleton
+class SceneInteractor
+@Inject
+constructor(
+    private val repository: SceneContainerRepository,
+) {
+
+    /**
+     * Returns the keys of all scenes in the container with the given name.
+     *
+     * The scenes will be sorted in z-order such that the last one is the one that should be
+     * rendered on top of all previous ones.
+     */
+    fun allSceneKeys(containerName: String): List<SceneKey> {
+        return repository.allSceneKeys(containerName)
+    }
+
+    /** Sets the scene in the container with the given name. */
+    fun setCurrentScene(containerName: String, scene: SceneModel) {
+        repository.setCurrentScene(containerName, scene)
+    }
+
+    /** The current scene in the container with the given name. */
+    fun currentScene(containerName: String): StateFlow<SceneModel> {
+        return repository.currentScene(containerName)
+    }
+
+    /** Sets the visibility of the container with the given name. */
+    fun setVisible(containerName: String, isVisible: Boolean) {
+        return repository.setVisible(containerName, isVisible)
+    }
+
+    /** Whether the container with the given name is visible. */
+    fun isVisible(containerName: String): StateFlow<Boolean> {
+        return repository.isVisible(containerName)
+    }
+
+    /** Sets scene transition progress to the current scene in the container with the given name. */
+    fun setSceneTransitionProgress(containerName: String, progress: Float) {
+        repository.setSceneTransitionProgress(containerName, progress)
+    }
+
+    /** Progress of the transition into the current scene in the container with the given name. */
+    fun sceneTransitionProgress(containerName: String): StateFlow<Float> {
+        return repository.sceneTransitionProgress(containerName)
+    }
+}

packages/SystemUI/tests/src/com/android/systemui/scene/domain/interactor/SceneInteractorTest.kt

@@ -0,0 +1,78 @@
+/*
+ * Copyright (C) 2023 The Android Open Source Project
+ *
+ * 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.
+ */
+
+@file:OptIn(ExperimentalCoroutinesApi::class, ExperimentalCoroutinesApi::class)
+
+package com.android.systemui.scene.domain.interactor
+
+import androidx.test.filters.SmallTest
+import com.android.systemui.SysuiTestCase
+import com.android.systemui.coroutines.collectLastValue
+import com.android.systemui.scene.data.repository.fakeSceneContainerRepository
+import com.android.systemui.scene.data.repository.fakeSceneKeys
+import com.android.systemui.scene.shared.model.SceneKey
+import com.android.systemui.scene.shared.model.SceneModel
+import com.google.common.truth.Truth.assertThat
+import kotlinx.coroutines.ExperimentalCoroutinesApi
+import kotlinx.coroutines.test.runTest
+import org.junit.Test
+import org.junit.runner.RunWith
+import org.junit.runners.JUnit4
+
+@SmallTest
+@RunWith(JUnit4::class)
+class SceneInteractorTest : SysuiTestCase() {
+
+    private val underTest =
+        SceneInteractor(
+            repository = fakeSceneContainerRepository(),
+        )
+
+    @Test
+    fun allSceneKeys() {
+        assertThat(underTest.allSceneKeys("container1")).isEqualTo(fakeSceneKeys())
+    }
+
+    @Test
+    fun sceneTransitions() = runTest {
+        val currentScene by collectLastValue(underTest.currentScene("container1"))
+        assertThat(currentScene).isEqualTo(SceneModel(SceneKey.LockScreen))
+
+        underTest.setCurrentScene("container1", SceneModel(SceneKey.Shade))
+        assertThat(currentScene).isEqualTo(SceneModel(SceneKey.Shade))
+    }
+
+    @Test
+    fun sceneTransitionProgress() = runTest {
+        val progress by collectLastValue(underTest.sceneTransitionProgress("container1"))
+        assertThat(progress).isEqualTo(1f)
+
+        underTest.setSceneTransitionProgress("container1", 0.55f)
+        assertThat(progress).isEqualTo(0.55f)
+    }
+
+    @Test
+    fun isVisible() = runTest {
+        val isVisible by collectLastValue(underTest.isVisible("container1"))
+        assertThat(isVisible).isTrue()
+
+        underTest.setVisible("container1", false)
+        assertThat(isVisible).isFalse()
+
+        underTest.setVisible("container1", true)
+        assertThat(isVisible).isTrue()
+    }
+}