diff --git a/packages/SystemUI/multivalentTests/src/com/android/systemui/scene/domain/startable/SceneContainerStartableTest.kt b/packages/SystemUI/multivalentTests/src/com/android/systemui/scene/domain/startable/SceneContainerStartableTest.kt
index cc66f8b..f018cc1 100644
--- a/packages/SystemUI/multivalentTests/src/com/android/systemui/scene/domain/startable/SceneContainerStartableTest.kt
+++ b/packages/SystemUI/multivalentTests/src/com/android/systemui/scene/domain/startable/SceneContainerStartableTest.kt
@@ -51,6 +51,8 @@
 import com.android.systemui.scene.shared.model.Scenes
 import com.android.systemui.scene.shared.model.fakeSceneDataSource
 import com.android.systemui.statusbar.NotificationShadeWindowController
+import com.android.systemui.statusbar.notification.data.repository.FakeHeadsUpRowRepository
+import com.android.systemui.statusbar.notification.data.repository.HeadsUpRowRepository
 import com.android.systemui.statusbar.notification.stack.data.repository.headsUpNotificationRepository
 import com.android.systemui.statusbar.notification.stack.domain.interactor.headsUpNotificationInteractor
 import com.android.systemui.statusbar.phone.CentralSurfaces
@@ -175,10 +177,12 @@
             transitionStateFlow.value = ObservableTransitionState.Idle(Scenes.Gone)
             assertThat(isVisible).isFalse()
 
-            kosmos.headsUpNotificationRepository.hasPinnedHeadsUp.value = true
+            kosmos.headsUpNotificationRepository.activeHeadsUpRows.value =
+                buildNotificationRows(isPinned = true)
             assertThat(isVisible).isTrue()
 
-            kosmos.headsUpNotificationRepository.hasPinnedHeadsUp.value = false
+            kosmos.headsUpNotificationRepository.activeHeadsUpRows.value =
+                buildNotificationRows(isPinned = false)
             assertThat(isVisible).isFalse()
         }
 
@@ -1070,4 +1074,17 @@
 
         return transitionStateFlow
     }
+
+    private fun buildNotificationRows(isPinned: Boolean = false): Set<HeadsUpRowRepository> =
+        setOf(
+            fakeHeadsUpRowRepository(key = "0", isPinned = isPinned),
+            fakeHeadsUpRowRepository(key = "1", isPinned = isPinned),
+            fakeHeadsUpRowRepository(key = "2", isPinned = isPinned),
+            fakeHeadsUpRowRepository(key = "3", isPinned = isPinned),
+        )
+
+    private fun fakeHeadsUpRowRepository(key: String, isPinned: Boolean) =
+        FakeHeadsUpRowRepository(key = key, elementKey = Any()).apply {
+            this.isPinned.value = isPinned
+        }
 }
diff --git a/packages/SystemUI/multivalentTests/src/com/android/systemui/statusbar/notification/domain/interactor/HeadsUpNotificationInteractorTest.kt b/packages/SystemUI/multivalentTests/src/com/android/systemui/statusbar/notification/domain/interactor/HeadsUpNotificationInteractorTest.kt
new file mode 100644
index 0000000..bba9991
--- /dev/null
+++ b/packages/SystemUI/multivalentTests/src/com/android/systemui/statusbar/notification/domain/interactor/HeadsUpNotificationInteractorTest.kt
@@ -0,0 +1,269 @@
+/*
+ * Copyright (C) 2024 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)
+
+package com.android.systemui.statusbar.notification.domain.interactor
+
+import android.platform.test.annotations.EnableFlags
+import androidx.test.ext.junit.runners.AndroidJUnit4
+import androidx.test.filters.SmallTest
+import com.android.systemui.SysuiTestCase
+import com.android.systemui.coroutines.collectLastValue
+import com.android.systemui.kosmos.testScope
+import com.android.systemui.statusbar.notification.data.repository.FakeHeadsUpRowRepository
+import com.android.systemui.statusbar.notification.shared.NotificationsHeadsUpRefactor
+import com.android.systemui.statusbar.notification.stack.data.repository.headsUpNotificationRepository
+import com.android.systemui.statusbar.notification.stack.data.repository.setNotifications
+import com.android.systemui.statusbar.notification.stack.domain.interactor.headsUpNotificationInteractor
+import com.android.systemui.testKosmos
+import com.google.common.truth.Truth.assertThat
+import kotlinx.coroutines.ExperimentalCoroutinesApi
+import kotlinx.coroutines.test.runCurrent
+import kotlinx.coroutines.test.runTest
+import org.junit.Test
+import org.junit.runner.RunWith
+
+@SmallTest
+@RunWith(AndroidJUnit4::class)
+@EnableFlags(NotificationsHeadsUpRefactor.FLAG_NAME)
+class HeadsUpNotificationInteractorTest : SysuiTestCase() {
+    private val kosmos = testKosmos()
+    private val testScope = kosmos.testScope
+    private val repository = kosmos.headsUpNotificationRepository
+
+    private val underTest = kosmos.headsUpNotificationInteractor
+
+    @Test
+    fun hasPinnedRows_emptyList_false() =
+        testScope.runTest {
+            val hasPinnedRows by collectLastValue(underTest.hasPinnedRows)
+
+            assertThat(hasPinnedRows).isFalse()
+        }
+
+    @Test
+    fun hasPinnedRows_noPinnedRows_false() =
+        testScope.runTest {
+            val hasPinnedRows by collectLastValue(underTest.hasPinnedRows)
+            // WHEN no pinned rows are set
+            repository.setNotifications(
+                fakeHeadsUpRowRepository("key 0"),
+                fakeHeadsUpRowRepository("key 1"),
+                fakeHeadsUpRowRepository("key 2"),
+            )
+            runCurrent()
+
+            // THEN hasPinnedRows is false
+            assertThat(hasPinnedRows).isFalse()
+        }
+
+    @Test
+    fun hasPinnedRows_hasPinnedRows_true() =
+        testScope.runTest {
+            val hasPinnedRows by collectLastValue(underTest.hasPinnedRows)
+            // WHEN a pinned rows is set
+            repository.setNotifications(
+                fakeHeadsUpRowRepository("key 0", isPinned = true),
+                fakeHeadsUpRowRepository("key 1"),
+                fakeHeadsUpRowRepository("key 2"),
+            )
+            runCurrent()
+
+            // THEN hasPinnedRows is true
+            assertThat(hasPinnedRows).isTrue()
+        }
+
+    @Test
+    fun hasPinnedRows_rowGetsPinned_true() =
+        testScope.runTest {
+            val hasPinnedRows by collectLastValue(underTest.hasPinnedRows)
+            // GIVEN no rows are pinned
+            val rows =
+                arrayListOf(
+                    fakeHeadsUpRowRepository("key 0"),
+                    fakeHeadsUpRowRepository("key 1"),
+                    fakeHeadsUpRowRepository("key 2"),
+                )
+            repository.setNotifications(rows)
+            runCurrent()
+
+            // WHEN a row gets pinned
+            rows[0].isPinned.value = true
+            runCurrent()
+
+            // THEN hasPinnedRows updates to true
+            assertThat(hasPinnedRows).isTrue()
+        }
+
+    @Test
+    fun hasPinnedRows_rowGetsUnPinned_false() =
+        testScope.runTest {
+            val hasPinnedRows by collectLastValue(underTest.hasPinnedRows)
+            // GIVEN one row is pinned
+            val rows =
+                arrayListOf(
+                    fakeHeadsUpRowRepository("key 0", isPinned = true),
+                    fakeHeadsUpRowRepository("key 1"),
+                    fakeHeadsUpRowRepository("key 2"),
+                )
+            repository.setNotifications(rows)
+            runCurrent()
+
+            // THEN that row gets unpinned
+            rows[0].isPinned.value = false
+            runCurrent()
+
+            // THEN hasPinnedRows updates to false
+            assertThat(hasPinnedRows).isFalse()
+        }
+
+    @Test
+    fun pinnedRows_noRows_isEmpty() =
+        testScope.runTest {
+            val pinnedHeadsUpRows by collectLastValue(underTest.pinnedHeadsUpRows)
+
+            assertThat(pinnedHeadsUpRows).isEmpty()
+        }
+
+    @Test
+    fun pinnedRows_noPinnedRows_isEmpty() =
+        testScope.runTest {
+            val pinnedHeadsUpRows by collectLastValue(underTest.pinnedHeadsUpRows)
+            // WHEN no rows are pinned
+            repository.setNotifications(
+                fakeHeadsUpRowRepository("key 0"),
+                fakeHeadsUpRowRepository("key 1"),
+                fakeHeadsUpRowRepository("key 2"),
+            )
+            runCurrent()
+
+            // THEN all rows are filtered
+            assertThat(pinnedHeadsUpRows).isEmpty()
+        }
+
+    @Test
+    fun pinnedRows_hasPinnedRows_containsPinnedRows() =
+        testScope.runTest {
+            val pinnedHeadsUpRows by collectLastValue(underTest.pinnedHeadsUpRows)
+            // WHEN some rows are pinned
+            val rows =
+                arrayListOf(
+                    fakeHeadsUpRowRepository("key 0", isPinned = true),
+                    fakeHeadsUpRowRepository("key 1", isPinned = true),
+                    fakeHeadsUpRowRepository("key 2"),
+                )
+            repository.setNotifications(rows)
+            runCurrent()
+
+            // THEN the unpinned rows are filtered
+            assertThat(pinnedHeadsUpRows).containsExactly(rows[0], rows[1])
+        }
+
+    @Test
+    fun pinnedRows_rowGetsPinned_containsPinnedRows() =
+        testScope.runTest {
+            val pinnedHeadsUpRows by collectLastValue(underTest.pinnedHeadsUpRows)
+            // GIVEN some rows are pinned
+            val rows =
+                arrayListOf(
+                    fakeHeadsUpRowRepository("key 0", isPinned = true),
+                    fakeHeadsUpRowRepository("key 1", isPinned = true),
+                    fakeHeadsUpRowRepository("key 2"),
+                )
+            repository.setNotifications(rows)
+            runCurrent()
+
+            // WHEN all rows gets pinned
+            rows[2].isPinned.value = true
+            runCurrent()
+
+            // THEN no rows are filtered
+            assertThat(pinnedHeadsUpRows).containsExactly(rows[0], rows[1], rows[2])
+        }
+
+    @Test
+    fun pinnedRows_allRowsPinned_containsAllRows() =
+        testScope.runTest {
+            val pinnedHeadsUpRows by collectLastValue(underTest.pinnedHeadsUpRows)
+            // WHEN all rows are pinned
+            val rows =
+                arrayListOf(
+                    fakeHeadsUpRowRepository("key 0", isPinned = true),
+                    fakeHeadsUpRowRepository("key 1", isPinned = true),
+                    fakeHeadsUpRowRepository("key 2", isPinned = true),
+                )
+            repository.setNotifications(rows)
+            runCurrent()
+
+            // THEN no rows are filtered
+            assertThat(pinnedHeadsUpRows).containsExactly(rows[0], rows[1], rows[2])
+        }
+
+    @Test
+    fun pinnedRows_rowGetsUnPinned_containsPinnedRows() =
+        testScope.runTest {
+            val pinnedHeadsUpRows by collectLastValue(underTest.pinnedHeadsUpRows)
+            // GIVEN all rows are pinned
+            val rows =
+                arrayListOf(
+                    fakeHeadsUpRowRepository("key 0", isPinned = true),
+                    fakeHeadsUpRowRepository("key 1", isPinned = true),
+                    fakeHeadsUpRowRepository("key 2", isPinned = true),
+                )
+            repository.setNotifications(rows)
+            runCurrent()
+
+            // WHEN a row gets unpinned
+            rows[0].isPinned.value = false
+            runCurrent()
+
+            // THEN the unpinned row is filtered
+            assertThat(pinnedHeadsUpRows).containsExactly(rows[1], rows[2])
+        }
+
+    @Test
+    fun pinnedRows_rowGetsPinnedAndUnPinned_containsTheSameInstance() =
+        testScope.runTest {
+            val pinnedHeadsUpRows by collectLastValue(underTest.pinnedHeadsUpRows)
+
+            val rows =
+                arrayListOf(
+                    fakeHeadsUpRowRepository("key 0"),
+                    fakeHeadsUpRowRepository("key 1"),
+                    fakeHeadsUpRowRepository("key 2"),
+                )
+            repository.setNotifications(rows)
+            runCurrent()
+
+            rows[0].isPinned.value = true
+            runCurrent()
+            assertThat(pinnedHeadsUpRows).containsExactly(rows[0])
+
+            rows[0].isPinned.value = false
+            runCurrent()
+            assertThat(pinnedHeadsUpRows).isEmpty()
+
+            rows[0].isPinned.value = true
+            runCurrent()
+            assertThat(pinnedHeadsUpRows).containsExactly(rows[0])
+        }
+
+    private fun fakeHeadsUpRowRepository(key: String, isPinned: Boolean = false) =
+        FakeHeadsUpRowRepository(key = key, elementKey = Any()).apply {
+            this.isPinned.value = isPinned
+        }
+}
diff --git a/packages/SystemUI/src/com/android/systemui/shade/NotificationPanelViewController.java b/packages/SystemUI/src/com/android/systemui/shade/NotificationPanelViewController.java
index 9cb920a..fe4abde 100644
--- a/packages/SystemUI/src/com/android/systemui/shade/NotificationPanelViewController.java
+++ b/packages/SystemUI/src/com/android/systemui/shade/NotificationPanelViewController.java
@@ -193,6 +193,7 @@
 import com.android.systemui.statusbar.notification.row.ExpandableNotificationRow;
 import com.android.systemui.statusbar.notification.row.ExpandableView;
 import com.android.systemui.statusbar.notification.row.NotificationGutsManager;
+import com.android.systemui.statusbar.notification.shared.NotificationsHeadsUpRefactor;
 import com.android.systemui.statusbar.notification.stack.AmbientState;
 import com.android.systemui.statusbar.notification.stack.AnimationProperties;
 import com.android.systemui.statusbar.notification.stack.NotificationListContainer;
@@ -4381,6 +4382,10 @@
 
         @Override
         public void onHeadsUpPinned(NotificationEntry entry) {
+            if (NotificationsHeadsUpRefactor.isEnabled()) {
+                return;
+            }
+
             if (!isKeyguardShowing()) {
                 mNotificationStackScrollLayoutController.generateHeadsUpAnimation(entry, true);
             }
@@ -4388,6 +4393,9 @@
 
         @Override
         public void onHeadsUpUnPinned(NotificationEntry entry) {
+            if (NotificationsHeadsUpRefactor.isEnabled()) {
+                return;
+            }
 
             // When we're unpinning the notification via active edge they remain heads-upped,
             // we need to make sure that an animation happens in this case, otherwise the
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/notification/data/NotificationDataLayerModule.kt b/packages/SystemUI/src/com/android/systemui/statusbar/notification/data/NotificationDataLayerModule.kt
index e5e5292..2b0d2aa 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/notification/data/NotificationDataLayerModule.kt
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/notification/data/NotificationDataLayerModule.kt
@@ -15,8 +15,8 @@
  */
 package com.android.systemui.statusbar.notification.data
 
-import com.android.systemui.statusbar.notification.data.repository.HeadsUpNotificationRepository
-import com.android.systemui.statusbar.notification.data.repository.HeadsUpNotificationRepositoryImpl
+import com.android.systemui.statusbar.notification.data.repository.HeadsUpRepository
+import com.android.systemui.statusbar.phone.HeadsUpManagerPhone
 import dagger.Binds
 import dagger.Module
 
@@ -27,8 +27,5 @@
         ]
 )
 interface NotificationDataLayerModule {
-    @Binds
-    fun bindHeadsUpNotificationRepository(
-        impl: HeadsUpNotificationRepositoryImpl
-    ): HeadsUpNotificationRepository
+    @Binds fun bindHeadsUpNotificationRepository(impl: HeadsUpManagerPhone): HeadsUpRepository
 }
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/notification/data/repository/HeadsUpNotificationRepository.kt b/packages/SystemUI/src/com/android/systemui/statusbar/notification/data/repository/HeadsUpNotificationRepository.kt
deleted file mode 100644
index d60ee98..0000000
--- a/packages/SystemUI/src/com/android/systemui/statusbar/notification/data/repository/HeadsUpNotificationRepository.kt
+++ /dev/null
@@ -1,59 +0,0 @@
-/*
- * Copyright (C) 2024 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.statusbar.notification.data.repository
-
-import com.android.systemui.common.coroutine.ConflatedCallbackFlow.conflatedCallbackFlow
-import com.android.systemui.statusbar.notification.collection.NotificationEntry
-import com.android.systemui.statusbar.policy.HeadsUpManager
-import com.android.systemui.statusbar.policy.OnHeadsUpChangedListener
-import javax.inject.Inject
-import kotlinx.coroutines.channels.awaitClose
-import kotlinx.coroutines.flow.Flow
-
-class HeadsUpNotificationRepositoryImpl
-@Inject
-constructor(
-    headsUpManager: HeadsUpManager,
-) : HeadsUpNotificationRepository {
-    override val hasPinnedHeadsUp: Flow<Boolean> = conflatedCallbackFlow {
-        val listener =
-            object : OnHeadsUpChangedListener {
-                override fun onHeadsUpPinnedModeChanged(inPinnedMode: Boolean) {
-                    trySend(headsUpManager.hasPinnedHeadsUp())
-                }
-
-                override fun onHeadsUpPinned(entry: NotificationEntry?) {
-                    trySend(headsUpManager.hasPinnedHeadsUp())
-                }
-
-                override fun onHeadsUpUnPinned(entry: NotificationEntry?) {
-                    trySend(headsUpManager.hasPinnedHeadsUp())
-                }
-
-                override fun onHeadsUpStateChanged(entry: NotificationEntry, isHeadsUp: Boolean) {
-                    trySend(headsUpManager.hasPinnedHeadsUp())
-                }
-            }
-        trySend(headsUpManager.hasPinnedHeadsUp())
-        headsUpManager.addListener(listener)
-        awaitClose { headsUpManager.removeListener(listener) }
-    }
-}
-
-interface HeadsUpNotificationRepository {
-    val hasPinnedHeadsUp: Flow<Boolean>
-}
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/notification/data/repository/HeadsUpRepository.kt b/packages/SystemUI/src/com/android/systemui/statusbar/notification/data/repository/HeadsUpRepository.kt
new file mode 100644
index 0000000..ed8c056
--- /dev/null
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/notification/data/repository/HeadsUpRepository.kt
@@ -0,0 +1,41 @@
+/*
+ * Copyright (C) 2024 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.statusbar.notification.data.repository
+
+import kotlinx.coroutines.flow.Flow
+
+/**
+ * A repository of currently displayed heads up notifications.
+ *
+ * This repository serves as a boundary between the
+ * [com.android.systemui.statusbar.policy.HeadsUpManager] and the modern notifications presentation
+ * codebase.
+ */
+interface HeadsUpRepository {
+
+    /**
+     * True if we are exiting the headsUp pinned mode, and some notifications might still be
+     * animating out. This is used to keep the touchable regions in a reasonable state.
+     */
+    val headsUpAnimatingAway: Flow<Boolean>
+
+    /** The heads up row that should be displayed on top. */
+    val topHeadsUpRow: Flow<HeadsUpRowRepository?>
+
+    /** Set of currently active top-level heads up rows to be displayed. */
+    val activeHeadsUpRows: Flow<Set<HeadsUpRowRepository>>
+}
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/notification/data/repository/HeadsUpRowRepository.kt b/packages/SystemUI/src/com/android/systemui/statusbar/notification/data/repository/HeadsUpRowRepository.kt
new file mode 100644
index 0000000..7b40812
--- /dev/null
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/notification/data/repository/HeadsUpRowRepository.kt
@@ -0,0 +1,36 @@
+/*
+ * Copyright (C) 2024 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.statusbar.notification.data.repository
+
+import com.android.systemui.statusbar.notification.shared.HeadsUpRowKey
+import kotlinx.coroutines.flow.StateFlow
+
+/** Representation of a top-level heads up row. */
+interface HeadsUpRowRepository : HeadsUpRowKey {
+    /**
+     * The key for this notification. Guaranteed to be immutable and unique.
+     *
+     * @see com.android.systemui.statusbar.notification.collection.NotificationEntry.getKey
+     */
+    val key: String
+
+    /** A key to identify this row in the view hierarchy. */
+    val elementKey: Any
+
+    /** Whether this notification is "pinned", meaning that it should stay on top of the screen. */
+    val isPinned: StateFlow<Boolean>
+}
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/notification/domain/interactor/HeadsUpNotificationInteractor.kt b/packages/SystemUI/src/com/android/systemui/statusbar/notification/domain/interactor/HeadsUpNotificationInteractor.kt
index 5c8f354..d1dd7b5 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/notification/domain/interactor/HeadsUpNotificationInteractor.kt
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/notification/domain/interactor/HeadsUpNotificationInteractor.kt
@@ -14,14 +14,59 @@
  * limitations under the License.
  */
 
+@file:OptIn(ExperimentalCoroutinesApi::class)
+
 package com.android.systemui.statusbar.notification.domain.interactor
 
-import com.android.systemui.statusbar.notification.data.repository.HeadsUpNotificationRepository
+import com.android.systemui.statusbar.notification.data.repository.HeadsUpRepository
+import com.android.systemui.statusbar.notification.data.repository.HeadsUpRowRepository
+import com.android.systemui.statusbar.notification.shared.HeadsUpRowKey
 import javax.inject.Inject
+import kotlinx.coroutines.ExperimentalCoroutinesApi
 import kotlinx.coroutines.flow.Flow
+import kotlinx.coroutines.flow.combine
+import kotlinx.coroutines.flow.flatMapLatest
+import kotlinx.coroutines.flow.flowOf
+import kotlinx.coroutines.flow.map
 
-class HeadsUpNotificationInteractor @Inject constructor(repository: HeadsUpNotificationRepository) {
+class HeadsUpNotificationInteractor @Inject constructor(repository: HeadsUpRepository) {
+
+    val topHeadsUpRow: Flow<HeadsUpRowKey?> = repository.topHeadsUpRow
+
+    /** Set of currently pinned top-level heads up rows to be displayed. */
+    val pinnedHeadsUpRows: Flow<Set<HeadsUpRowKey>> =
+        repository.activeHeadsUpRows.flatMapLatest { repositories ->
+            if (repositories.isNotEmpty()) {
+                val toCombine: List<Flow<Pair<HeadsUpRowRepository, Boolean>>> =
+                    repositories.map { repo -> repo.isPinned.map { isPinned -> repo to isPinned } }
+                combine(toCombine) { pairs ->
+                    pairs.filter { (_, isPinned) -> isPinned }.map { (repo, _) -> repo }.toSet()
+                }
+            } else {
+                // if the set is empty, there are no flows to combine
+                flowOf(emptySet())
+            }
+        }
+
+    /** Are there any pinned heads up rows to display? */
+    val hasPinnedRows: Flow<Boolean> =
+        repository.activeHeadsUpRows.flatMapLatest { rows ->
+            if (rows.isNotEmpty()) {
+                combine(rows.map { it.isPinned }) { pins -> pins.any { it } }
+            } else {
+                // if the set is empty, there are no flows to combine
+                flowOf(false)
+            }
+        }
+
     val isHeadsUpOrAnimatingAway: Flow<Boolean> =
-        // TODO(b/296118689): Needs to include the animating away state.
-        repository.hasPinnedHeadsUp
+        combine(hasPinnedRows, repository.headsUpAnimatingAway) { hasPinnedRows, animatingAway ->
+            hasPinnedRows || animatingAway
+        }
+
+    fun headsUpRow(key: HeadsUpRowKey): HeadsUpRowInteractor =
+        HeadsUpRowInteractor(key as HeadsUpRowRepository)
+    fun elementKeyFor(key: HeadsUpRowKey) = (key as HeadsUpRowRepository).elementKey
 }
+
+class HeadsUpRowInteractor(repository: HeadsUpRowRepository)
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/notification/shared/HeadsUpRowKey.kt b/packages/SystemUI/src/com/android/systemui/statusbar/notification/shared/HeadsUpRowKey.kt
new file mode 100644
index 0000000..8dc395d
--- /dev/null
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/notification/shared/HeadsUpRowKey.kt
@@ -0,0 +1,24 @@
+/*
+ * Copyright (C) 2024 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.statusbar.notification.shared
+
+/**
+ * A unique key representing a top-level heads up notification.
+ *
+ * @see com.android.systemui.statusbar.notification.domain.interactor.HeadsUpNotificationInteractor
+ */
+interface HeadsUpRowKey
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/notification/stack/NotificationStackScrollLayout.java b/packages/SystemUI/src/com/android/systemui/statusbar/notification/stack/NotificationStackScrollLayout.java
index f2c593d..fb52838 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/notification/stack/NotificationStackScrollLayout.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/notification/stack/NotificationStackScrollLayout.java
@@ -5405,7 +5405,7 @@
     /**
      * @param topHeadsUpRow the first headsUp row in z-order.
      */
-    public void setTopHeadsUpRow(ExpandableNotificationRow topHeadsUpRow) {
+    public void setTopHeadsUpRow(@Nullable ExpandableNotificationRow topHeadsUpRow) {
         mTopHeadsUpRow = topHeadsUpRow;
     }
 
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/notification/stack/NotificationStackScrollLayoutController.java b/packages/SystemUI/src/com/android/systemui/statusbar/notification/stack/NotificationStackScrollLayoutController.java
index 8ed1ca2..7bdd3f9 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/notification/stack/NotificationStackScrollLayoutController.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/notification/stack/NotificationStackScrollLayoutController.java
@@ -126,6 +126,7 @@
 import com.android.systemui.statusbar.notification.row.NotificationGuts;
 import com.android.systemui.statusbar.notification.row.NotificationGutsManager;
 import com.android.systemui.statusbar.notification.row.NotificationSnooze;
+import com.android.systemui.statusbar.notification.shared.NotificationsHeadsUpRefactor;
 import com.android.systemui.statusbar.notification.stack.domain.interactor.NotificationStackAppearanceInteractor;
 import com.android.systemui.statusbar.notification.stack.ui.viewbinder.NotificationListViewBinder;
 import com.android.systemui.statusbar.phone.HeadsUpAppearanceController;
@@ -685,11 +686,13 @@
             new OnHeadsUpChangedListener() {
                 @Override
                 public void onHeadsUpPinnedModeChanged(boolean inPinnedMode) {
+                    NotificationsHeadsUpRefactor.assertInLegacyMode();
                     mView.setInHeadsUpPinnedMode(inPinnedMode);
                 }
 
                 @Override
                 public void onHeadsUpStateChanged(NotificationEntry entry, boolean isHeadsUp) {
+                    NotificationsHeadsUpRefactor.assertInLegacyMode();
                     NotificationEntry topEntry = mHeadsUpManager.getTopEntry();
                     mView.setTopHeadsUpRow(topEntry != null ? topEntry.getRow() : null);
                     generateHeadsUpAnimation(entry, isHeadsUp);
@@ -870,7 +873,9 @@
             });
         }
 
-        mHeadsUpManager.addListener(mOnHeadsUpChangedListener);
+        if (!NotificationsHeadsUpRefactor.isEnabled()) {
+            mHeadsUpManager.addListener(mOnHeadsUpChangedListener);
+        }
         mHeadsUpManager.setAnimationStateHandler(mView::setHeadsUpGoingAwayAnimationsAllowed);
         mDynamicPrivacyController.addListener(mDynamicPrivacyControllerListener);
 
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/notification/stack/ui/viewbinder/NotificationListViewBinder.kt b/packages/SystemUI/src/com/android/systemui/statusbar/notification/stack/ui/viewbinder/NotificationListViewBinder.kt
index 6b30393..97cbbe8 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/notification/stack/ui/viewbinder/NotificationListViewBinder.kt
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/notification/stack/ui/viewbinder/NotificationListViewBinder.kt
@@ -36,6 +36,7 @@
 import com.android.systemui.statusbar.notification.footer.ui.viewbinder.FooterViewBinder
 import com.android.systemui.statusbar.notification.footer.ui.viewmodel.FooterViewModel
 import com.android.systemui.statusbar.notification.icon.ui.viewbinder.NotificationIconContainerShelfViewBinder
+import com.android.systemui.statusbar.notification.shared.NotificationsHeadsUpRefactor
 import com.android.systemui.statusbar.notification.shared.NotificationsLiveDataStoreRefactor
 import com.android.systemui.statusbar.notification.shelf.ui.viewbinder.NotificationShelfViewBinder
 import com.android.systemui.statusbar.notification.stack.DisplaySwitchNotificationsHiderTracker
@@ -44,6 +45,7 @@
 import com.android.systemui.statusbar.notification.stack.ui.view.NotificationStatsLogger
 import com.android.systemui.statusbar.notification.stack.ui.viewbinder.HideNotificationsBinder.bindHideList
 import com.android.systemui.statusbar.notification.stack.ui.viewmodel.NotificationListViewModel
+import com.android.systemui.statusbar.notification.ui.viewbinder.HeadsUpNotificationViewBinder
 import com.android.systemui.statusbar.phone.NotificationIconAreaController
 import com.android.systemui.util.kotlin.awaitCancellationThenDispose
 import com.android.systemui.util.kotlin.getOrNull
@@ -71,6 +73,7 @@
     private val hiderTracker: DisplaySwitchNotificationsHiderTracker,
     private val configuration: ConfigurationState,
     private val falsingManager: FalsingManager,
+    private val hunBinder: HeadsUpNotificationViewBinder,
     private val iconAreaController: NotificationIconAreaController,
     private val loggerOptional: Optional<NotificationStatsLogger>,
     private val metricsLogger: MetricsLogger,
@@ -92,6 +95,9 @@
 
         view.repeatWhenAttached {
             lifecycleScope.launch {
+                if (NotificationsHeadsUpRefactor.isEnabled) {
+                    launch { hunBinder.bindHeadsUpNotifications(view) }
+                }
                 launch { bindShelf(shelf) }
                 bindHideList(viewController, viewModel, hiderTracker)
 
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/notification/stack/ui/viewmodel/HeadsUpRowViewModel.kt b/packages/SystemUI/src/com/android/systemui/statusbar/notification/stack/ui/viewmodel/HeadsUpRowViewModel.kt
new file mode 100644
index 0000000..ec5e5be
--- /dev/null
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/notification/stack/ui/viewmodel/HeadsUpRowViewModel.kt
@@ -0,0 +1,21 @@
+/*
+ * Copyright (C) 2024 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.statusbar.notification.stack.ui.viewmodel
+
+import com.android.systemui.statusbar.notification.domain.interactor.HeadsUpRowInteractor
+
+class HeadsUpRowViewModel(headsUpRowInteractor: HeadsUpRowInteractor)
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/notification/stack/ui/viewmodel/NotificationListViewModel.kt b/packages/SystemUI/src/com/android/systemui/statusbar/notification/stack/ui/viewmodel/NotificationListViewModel.kt
index 4744fcb..a6ca027 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/notification/stack/ui/viewmodel/NotificationListViewModel.kt
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/notification/stack/ui/viewmodel/NotificationListViewModel.kt
@@ -17,12 +17,16 @@
 package com.android.systemui.statusbar.notification.stack.ui.viewmodel
 
 import com.android.systemui.dagger.qualifiers.Background
+import com.android.systemui.keyguard.domain.interactor.KeyguardInteractor
 import com.android.systemui.shade.domain.interactor.ShadeInteractor
 import com.android.systemui.statusbar.domain.interactor.RemoteInputInteractor
 import com.android.systemui.statusbar.notification.domain.interactor.ActiveNotificationsInteractor
+import com.android.systemui.statusbar.notification.domain.interactor.HeadsUpNotificationInteractor
 import com.android.systemui.statusbar.notification.domain.interactor.SeenNotificationsInteractor
 import com.android.systemui.statusbar.notification.footer.shared.FooterViewRefactor
 import com.android.systemui.statusbar.notification.footer.ui.viewmodel.FooterViewModel
+import com.android.systemui.statusbar.notification.shared.HeadsUpRowKey
+import com.android.systemui.statusbar.notification.shared.NotificationsHeadsUpRefactor
 import com.android.systemui.statusbar.notification.shelf.ui.viewmodel.NotificationShelfViewModel
 import com.android.systemui.statusbar.notification.stack.domain.interactor.NotificationStackInteractor
 import com.android.systemui.statusbar.policy.domain.interactor.UserSetupInteractor
@@ -53,6 +57,8 @@
     val logger: Optional<NotificationLoggerViewModel>,
     activeNotificationsInteractor: ActiveNotificationsInteractor,
     notificationStackInteractor: NotificationStackInteractor,
+    private val headsUpNotificationInteractor: HeadsUpNotificationInteractor,
+    keyguardInteractor: KeyguardInteractor,
     remoteInputInteractor: RemoteInputInteractor,
     seenNotificationsInteractor: SeenNotificationsInteractor,
     shadeInteractor: ShadeInteractor,
@@ -212,4 +218,41 @@
             activeNotificationsInteractor.hasNonClearableSilentNotifications
         }
     }
+
+    val topHeadsUpRow: Flow<HeadsUpRowKey?> by lazy {
+        if (NotificationsHeadsUpRefactor.isUnexpectedlyInLegacyMode()) {
+            flowOf(null)
+        } else {
+            headsUpNotificationInteractor.topHeadsUpRow
+        }
+    }
+
+    val pinnedHeadsUpRows: Flow<Set<HeadsUpRowKey>> by lazy {
+        if (NotificationsHeadsUpRefactor.isUnexpectedlyInLegacyMode()) {
+            flowOf(emptySet())
+        } else {
+            headsUpNotificationInteractor.pinnedHeadsUpRows
+        }
+    }
+
+    val headsUpAnimationsEnabled: Flow<Boolean> by lazy {
+        combine(keyguardInteractor.isKeyguardShowing, shadeInteractor.isShadeFullyExpanded) {
+            (isKeyguardShowing, isShadeFullyExpanded) ->
+            // TODO(b/325936094) use isShadeFullyCollapsed instead
+            !isKeyguardShowing && !isShadeFullyExpanded
+        }
+    }
+
+    val hasPinnedHeadsUpRow: Flow<Boolean> by lazy {
+        if (NotificationsHeadsUpRefactor.isUnexpectedlyInLegacyMode()) {
+            flowOf(false)
+        } else {
+            headsUpNotificationInteractor.hasPinnedRows
+        }
+    }
+
+    // TODO(b/325936094) use it for the text displayed in the StatusBar
+    fun headsUpRow(key: HeadsUpRowKey): HeadsUpRowViewModel =
+        HeadsUpRowViewModel(headsUpNotificationInteractor.headsUpRow(key))
+    fun elementKeyFor(key: HeadsUpRowKey): Any = headsUpNotificationInteractor.elementKeyFor(key)
 }
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/notification/ui/viewbinder/HeadsUpNotificationViewBinder.kt b/packages/SystemUI/src/com/android/systemui/statusbar/notification/ui/viewbinder/HeadsUpNotificationViewBinder.kt
new file mode 100644
index 0000000..cb360fe
--- /dev/null
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/notification/ui/viewbinder/HeadsUpNotificationViewBinder.kt
@@ -0,0 +1,78 @@
+/*
+ * Copyright (C) 2024 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.statusbar.notification.ui.viewbinder
+
+import android.util.Log
+import com.android.systemui.statusbar.notification.row.ExpandableNotificationRow
+import com.android.systemui.statusbar.notification.shared.HeadsUpRowKey
+import com.android.systemui.statusbar.notification.stack.NotificationStackScrollLayout
+import com.android.systemui.statusbar.notification.stack.ui.viewmodel.NotificationListViewModel
+import com.android.systemui.util.kotlin.sample
+import javax.inject.Inject
+import kotlinx.coroutines.coroutineScope
+import kotlinx.coroutines.launch
+
+private const val TAG = "HunBinder"
+private val DEBUG = true // Compile.IS_DEBUG && Log.isLoggable(TAG, Log.DEBUG)
+
+class HeadsUpNotificationViewBinder
+@Inject
+constructor(private val viewModel: NotificationListViewModel) {
+    suspend fun bindHeadsUpNotifications(parentView: NotificationStackScrollLayout): Unit =
+        coroutineScope {
+            launch {
+                var previousKeys = emptySet<HeadsUpRowKey>()
+                viewModel.pinnedHeadsUpRows
+                    .sample(viewModel.headsUpAnimationsEnabled, ::Pair)
+                    .collect { (newKeys, animationsEnabled) ->
+                        if (DEBUG) {
+                            Log.d(TAG, "update:$newKeys")
+                        }
+
+                        val added = newKeys - previousKeys
+                        val removed = previousKeys - newKeys
+                        previousKeys = newKeys
+
+                        if (animationsEnabled) {
+                            added.forEach { key ->
+                                parentView.generateHeadsUpAnimation(
+                                    obtainView(key),
+                                    /* isHeadsUp = */ true
+                                )
+                            }
+                            removed.forEach { key ->
+                                val row = obtainView(key)
+                                parentView.generateHeadsUpAnimation(row, /* isHeadsUp = */ false)
+                                row.setHeadsUpIsVisible()
+                            }
+                        }
+                    }
+            }
+            launch {
+                viewModel.topHeadsUpRow.collect { key ->
+                    parentView.setTopHeadsUpRow(key?.let(::obtainView))
+                }
+            }
+            launch {
+                viewModel.hasPinnedHeadsUpRow.collect { parentView.setInHeadsUpPinnedMode(it) }
+            }
+        }
+
+    private fun obtainView(key: HeadsUpRowKey): ExpandableNotificationRow {
+        return viewModel.elementKeyFor(key) as ExpandableNotificationRow
+    }
+}
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/phone/HeadsUpManagerPhone.java b/packages/SystemUI/src/com/android/systemui/statusbar/phone/HeadsUpManagerPhone.java
index 86bb844..3f200d5 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/phone/HeadsUpManagerPhone.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/phone/HeadsUpManagerPhone.java
@@ -22,6 +22,7 @@
 import android.content.res.Resources;
 import android.graphics.Region;
 import android.os.Handler;
+import android.util.ArrayMap;
 import android.util.Pools;
 
 import androidx.collection.ArraySet;
@@ -40,6 +41,8 @@
 import com.android.systemui.statusbar.notification.collection.provider.OnReorderingAllowedListener;
 import com.android.systemui.statusbar.notification.collection.provider.VisualStabilityProvider;
 import com.android.systemui.statusbar.notification.collection.render.GroupMembershipManager;
+import com.android.systemui.statusbar.notification.data.repository.HeadsUpRepository;
+import com.android.systemui.statusbar.notification.data.repository.HeadsUpRowRepository;
 import com.android.systemui.statusbar.notification.row.ExpandableNotificationRow;
 import com.android.systemui.statusbar.notification.shared.NotificationsHeadsUpRefactor;
 import com.android.systemui.statusbar.policy.AccessibilityManagerWrapper;
@@ -59,13 +62,21 @@
 import java.util.ArrayList;
 import java.util.HashSet;
 import java.util.List;
+import java.util.Objects;
+import java.util.Set;
 import java.util.Stack;
 
 import javax.inject.Inject;
 
+import kotlinx.coroutines.flow.Flow;
+import kotlinx.coroutines.flow.MutableStateFlow;
+import kotlinx.coroutines.flow.StateFlow;
+import kotlinx.coroutines.flow.StateFlowKt;
+
 /** A implementation of HeadsUpManager for phone. */
 @SysUISingleton
-public class HeadsUpManagerPhone extends BaseHeadsUpManager implements OnHeadsUpChangedListener {
+public class HeadsUpManagerPhone extends BaseHeadsUpManager implements
+        HeadsUpRepository, OnHeadsUpChangedListener {
     private static final String TAG = "HeadsUpManagerPhone";
 
     @VisibleForTesting
@@ -74,15 +85,20 @@
     private final GroupMembershipManager mGroupMembershipManager;
     private final List<OnHeadsUpPhoneListenerChange> mHeadsUpPhoneListeners = new ArrayList<>();
     private final VisualStabilityProvider mVisualStabilityProvider;
-    private boolean mReleaseOnExpandFinish;
 
+    // TODO(b/328393698) move the topHeadsUpRow logic to an interactor
+    private final MutableStateFlow<HeadsUpRowRepository> mTopHeadsUpRow =
+            StateFlowKt.MutableStateFlow(null);
+    private final MutableStateFlow<Set<HeadsUpRowRepository>> mHeadsUpNotificationRows =
+            StateFlowKt.MutableStateFlow(new HashSet<>());
+    private final MutableStateFlow<Boolean> mHeadsUpGoingAway = StateFlowKt.MutableStateFlow(false);
+    private boolean mReleaseOnExpandFinish;
     private boolean mTrackingHeadsUp;
     private final HashSet<String> mSwipedOutKeys = new HashSet<>();
     private final HashSet<NotificationEntry> mEntriesToRemoveAfterExpand = new HashSet<>();
     private final ArraySet<NotificationEntry> mEntriesToRemoveWhenReorderingAllowed
             = new ArraySet<>();
     private boolean mIsExpanded;
-    private boolean mHeadsUpGoingAway;
     private int mStatusBarState;
     private AnimationStateHandler mAnimationStateHandler;
     private int mHeadsUpInset;
@@ -248,7 +264,7 @@
         if (isExpanded != mIsExpanded) {
             mIsExpanded = isExpanded;
             if (isExpanded) {
-                mHeadsUpGoingAway = false;
+                mHeadsUpGoingAway.setValue(false);
             }
         }
     }
@@ -259,17 +275,17 @@
      */
     @Override
     public void setHeadsUpGoingAway(boolean headsUpGoingAway) {
-        if (headsUpGoingAway != mHeadsUpGoingAway) {
-            mHeadsUpGoingAway = headsUpGoingAway;
+        if (headsUpGoingAway != mHeadsUpGoingAway.getValue()) {
             for (OnHeadsUpPhoneListenerChange listener : mHeadsUpPhoneListeners) {
                 listener.onHeadsUpGoingAwayStateChanged(headsUpGoingAway);
             }
+            mHeadsUpGoingAway.setValue(headsUpGoingAway);
         }
     }
 
     @Override
     public boolean isHeadsUpGoingAway() {
-        return mHeadsUpGoingAway;
+        return mHeadsUpGoingAway.getValue();
     }
 
     /**
@@ -288,6 +304,7 @@
             } else {
                 headsUpEntry.updateEntry(false /* updatePostTime */, "setRemoteInputActive(false)");
             }
+            onEntryUpdated(headsUpEntry);
         }
     }
 
@@ -387,11 +404,35 @@
     }
 
     @Override
+    protected void onEntryAdded(HeadsUpEntry headsUpEntry) {
+        super.onEntryAdded(headsUpEntry);
+        updateTopHeadsUpFlow();
+        updateHeadsUpFlow();
+    }
+
+    @Override
+    protected void onEntryUpdated(HeadsUpEntry headsUpEntry) {
+        super.onEntryUpdated(headsUpEntry);
+        // no need to update the list here
+        updateTopHeadsUpFlow();
+    }
+
+    @Override
     protected void onEntryRemoved(HeadsUpEntry headsUpEntry) {
         super.onEntryRemoved(headsUpEntry);
         if (!NotificationsHeadsUpRefactor.isEnabled()) {
             mEntryPool.release((HeadsUpEntryPhone) headsUpEntry);
         }
+        updateTopHeadsUpFlow();
+        updateHeadsUpFlow();
+    }
+
+    private void updateTopHeadsUpFlow() {
+        mTopHeadsUpRow.setValue((HeadsUpRowRepository) getTopHeadsUpEntry());
+    }
+
+    private void updateHeadsUpFlow() {
+        mHeadsUpNotificationRows.setValue(new HashSet<>(getHeadsUpEntryPhoneMap().values()));
     }
 
     @Override
@@ -415,6 +456,12 @@
     ///////////////////////////////////////////////////////////////////////////////////////////////
     //  Private utility methods:
 
+    @NonNull
+    private ArrayMap<String, HeadsUpEntryPhone> getHeadsUpEntryPhoneMap() {
+        //noinspection unchecked
+        return (ArrayMap<String, HeadsUpEntryPhone>) ((ArrayMap) mHeadsUpEntryMap);
+    }
+
     @Nullable
     private HeadsUpEntryPhone getHeadsUpEntryPhone(@NonNull String key) {
         return (HeadsUpEntryPhone) mHeadsUpEntryMap.get(key);
@@ -422,7 +469,11 @@
 
     @Nullable
     private HeadsUpEntryPhone getTopHeadsUpEntryPhone() {
-        return (HeadsUpEntryPhone) getTopHeadsUpEntry();
+        if (NotificationsHeadsUpRefactor.isEnabled()) {
+            return (HeadsUpEntryPhone) mTopHeadsUpRow.getValue();
+        } else {
+            return (HeadsUpEntryPhone) getTopHeadsUpEntry();
+        }
     }
 
     @Override
@@ -439,12 +490,32 @@
         return headsUpEntry == null || headsUpEntry != topEntry || super.canRemoveImmediately(key);
     }
 
+    @Override
+    @NonNull
+    public Flow<HeadsUpRowRepository> getTopHeadsUpRow() {
+        return mTopHeadsUpRow;
+    }
+
+    @Override
+    @NonNull
+    public Flow<Set<HeadsUpRowRepository>> getActiveHeadsUpRows() {
+        return mHeadsUpNotificationRows;
+    }
+
+    @Override
+    @NonNull
+    public Flow<Boolean> getHeadsUpAnimatingAway() {
+        return mHeadsUpGoingAway;
+    }
+
     ///////////////////////////////////////////////////////////////////////////////////////////////
     //  HeadsUpEntryPhone:
 
-    protected class HeadsUpEntryPhone extends BaseHeadsUpManager.HeadsUpEntry {
+    protected class HeadsUpEntryPhone extends BaseHeadsUpManager.HeadsUpEntry implements
+            HeadsUpRowRepository {
 
         private boolean mGutsShownPinned;
+        private final MutableStateFlow<Boolean> mIsPinned = StateFlowKt.MutableStateFlow(false);
 
         /**
          * If the time this entry has been on was extended
@@ -465,6 +536,25 @@
         }
 
         @Override
+        @NonNull
+        public String getKey() {
+            return requireEntry().getKey();
+        }
+
+        @Override
+        @NonNull
+        public StateFlow<Boolean> isPinned() {
+            return mIsPinned;
+        }
+
+        @Override
+        protected void setRowPinned(boolean pinned) {
+            // TODO(b/327624082): replace this super call with a ViewBinder
+            super.setRowPinned(pinned);
+            mIsPinned.setValue(pinned);
+        }
+
+        @Override
         protected Runnable createRemoveRunnable(NotificationEntry entry) {
             return  () -> {
                 if (!mVisualStabilityProvider.isReorderingAllowed()
@@ -539,6 +629,17 @@
         protected long calculateFinishTime() {
             return super.calculateFinishTime() + (extended ? mExtensionTime : 0);
         }
+
+        @Override
+        @NonNull
+        public Object getElementKey() {
+            return requireEntry().getRow();
+        }
+
+        private NotificationEntry requireEntry() {
+            /* check if */ NotificationsHeadsUpRefactor.isUnexpectedlyInLegacyMode();
+            return Objects.requireNonNull(mEntry);
+        }
     }
 
     private final StateListener mStatusBarStateListener = new StateListener() {
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/policy/BaseHeadsUpManager.java b/packages/SystemUI/src/com/android/systemui/statusbar/policy/BaseHeadsUpManager.java
index 6f7e046..20a82a4 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/policy/BaseHeadsUpManager.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/policy/BaseHeadsUpManager.java
@@ -172,6 +172,7 @@
             // Add new entry and begin managing it
             mHeadsUpEntryMap.put(entry.getKey(), headsUpEntry);
             onEntryAdded(headsUpEntry);
+            // TODO(b/328390331) move accessibility events to the view layer
             entry.sendAccessibilityEvent(AccessibilityEvent.TYPE_WINDOW_CONTENT_CHANGED);
             entry.setIsHeadsUpEntry(true);
 
@@ -232,7 +233,7 @@
             // with the groupmanager
             return;
         }
-
+        // TODO(b/328390331) move accessibility events to the view layer
         headsUpEntry.mEntry.sendAccessibilityEvent(AccessibilityEvent.TYPE_WINDOW_CONTENT_CHANGED);
 
         if (shouldHeadsUpAgain) {
@@ -332,15 +333,15 @@
         if (!isPinned) {
             headsUpEntry.mWasUnpinned = true;
         }
-        if (headsUpEntry.isPinned() != isPinned) {
-            headsUpEntry.setPinned(isPinned);
+        if (headsUpEntry.isRowPinned() != isPinned) {
+            headsUpEntry.setRowPinned(isPinned);
             updatePinnedMode();
             if (isPinned && entry.getSbn() != null) {
                mUiEventLogger.logWithInstanceId(
                         NotificationPeekEvent.NOTIFICATION_PEEK, entry.getSbn().getUid(),
                         entry.getSbn().getPackageName(), entry.getSbn().getInstanceId());
             }
-            // TODO(b/325936094) convert these listeners to collecting a flow
+        // TODO(b/325936094) use the isPinned Flow instead
             for (OnHeadsUpChangedListener listener : mListeners) {
                 if (isPinned) {
                     listener.onHeadsUpPinned(entry);
@@ -359,7 +360,7 @@
      * Manager-specific logic that should occur when an entry is added.
      * @param headsUpEntry entry added
      */
-    void onEntryAdded(HeadsUpEntry headsUpEntry) {
+    protected void onEntryAdded(HeadsUpEntry headsUpEntry) {
         NotificationEntry entry = headsUpEntry.mEntry;
         entry.setHeadsUp(true);
 
@@ -391,6 +392,7 @@
             entry.demoteStickyHun();
             mHeadsUpEntryMap.remove(key);
             onEntryRemoved(headsUpEntry);
+            // TODO(b/328390331) move accessibility events to the view layer
             entry.sendAccessibilityEvent(AccessibilityEvent.TYPE_WINDOW_CONTENT_CHANGED);
             if (NotificationsHeadsUpRefactor.isEnabled()) {
                 headsUpEntry.cancelAutoRemovalCallbacks("removeEntry");
@@ -416,7 +418,16 @@
         }
     }
 
-    private void updatePinnedMode() {
+    /**
+     * Manager-specific logic, that should occur, when the entry is updated, and its posted time has
+     * changed.
+     *
+     * @param headsUpEntry entry updated
+     */
+    protected void onEntryUpdated(HeadsUpEntry headsUpEntry) {
+    }
+
+    protected void updatePinnedMode() {
         boolean hasPinnedNotification = hasPinnedNotificationInternal();
         if (hasPinnedNotification == mHasPinnedNotification) {
             return;
@@ -471,7 +482,7 @@
     @Nullable
     protected HeadsUpEntry getHeadsUpEntry(@NonNull String key) {
         // TODO(b/315362456) See if callers need to check AvalancheController
-        return (HeadsUpEntry) mHeadsUpEntryMap.get(key);
+        return mHeadsUpEntryMap.get(key);
     }
 
     /**
@@ -491,7 +502,7 @@
         HeadsUpEntry topEntry = null;
         for (HeadsUpEntry entry: mHeadsUpEntryMap.values()) {
             if (topEntry == null || entry.compareTo(topEntry) < 0) {
-                topEntry = (HeadsUpEntry) entry;
+                topEntry = entry;
             }
         }
         return topEntry;
@@ -720,11 +731,11 @@
             updateEntry(true /* updatePostTime */, "setEntry");
         }
 
-        public boolean isPinned() {
+        protected boolean isRowPinned() {
             return mEntry != null && mEntry.isRowPinned();
         }
 
-        public void setPinned(boolean pinned) {
+        protected void setRowPinned(boolean pinned) {
             if (mEntry != null) mEntry.setRowPinned(pinned);
         }
 
@@ -764,6 +775,9 @@
                 return timeLeft;
             };
             scheduleAutoRemovalCallback(finishTimeCalculator, "updateEntry (not sticky)");
+
+            // Notify the manager, that the posted time has changed.
+            onEntryUpdated(this);
         }
 
         /**
diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/policy/HeadsUpManager.kt b/packages/SystemUI/src/com/android/systemui/statusbar/policy/HeadsUpManager.kt
index 420701f..52a2e9c 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/policy/HeadsUpManager.kt
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/policy/HeadsUpManager.kt
@@ -196,6 +196,7 @@
      * Called when a heads up notification is 'going away' or no longer 'going away'. See
      * [HeadsUpManager.setHeadsUpGoingAway].
      */
+    // TODO(b/325936094) delete this callback, and listen to the flow instead
     fun onHeadsUpGoingAwayStateChanged(headsUpGoingAway: Boolean)
 }
 
diff --git a/packages/SystemUI/tests/src/com/android/systemui/statusbar/notification/stack/ui/viewmodel/NotificationListViewModelTest.kt b/packages/SystemUI/tests/src/com/android/systemui/statusbar/notification/stack/ui/viewmodel/NotificationListViewModelTest.kt
index 0a18eb6..138e1fa 100644
--- a/packages/SystemUI/tests/src/com/android/systemui/statusbar/notification/stack/ui/viewmodel/NotificationListViewModelTest.kt
+++ b/packages/SystemUI/tests/src/com/android/systemui/statusbar/notification/stack/ui/viewmodel/NotificationListViewModelTest.kt
@@ -35,9 +35,13 @@
 import com.android.systemui.res.R
 import com.android.systemui.shade.data.repository.fakeShadeRepository
 import com.android.systemui.statusbar.data.repository.fakeRemoteInputRepository
+import com.android.systemui.statusbar.notification.data.repository.FakeHeadsUpRowRepository
 import com.android.systemui.statusbar.notification.data.repository.activeNotificationListRepository
 import com.android.systemui.statusbar.notification.data.repository.setActiveNotifs
 import com.android.systemui.statusbar.notification.footer.shared.FooterViewRefactor
+import com.android.systemui.statusbar.notification.shared.NotificationsHeadsUpRefactor
+import com.android.systemui.statusbar.notification.stack.data.repository.headsUpNotificationRepository
+import com.android.systemui.statusbar.notification.stack.data.repository.setNotifications
 import com.android.systemui.statusbar.policy.data.repository.fakeUserSetupRepository
 import com.android.systemui.statusbar.policy.data.repository.zenModeRepository
 import com.android.systemui.statusbar.policy.fakeConfigurationController
@@ -70,6 +74,7 @@
     private val fakeRemoteInputRepository = kosmos.fakeRemoteInputRepository
     private val fakeShadeRepository = kosmos.fakeShadeRepository
     private val fakeUserSetupRepository = kosmos.fakeUserSetupRepository
+    private val headsUpRepository = kosmos.headsUpNotificationRepository
     private val zenModeRepository = kosmos.zenModeRepository
 
     val underTest = kosmos.notificationListViewModel
@@ -464,4 +469,120 @@
             // THEN footer visibility does not animate
             assertThat(shouldShow?.isAnimating).isFalse()
         }
+
+    @Test
+    @EnableFlags(NotificationsHeadsUpRefactor.FLAG_NAME)
+    fun testPinnedHeadsUpRows_filtersForPinnedItems() =
+        testScope.runTest {
+            val pinnedHeadsUpRows by collectLastValue(underTest.pinnedHeadsUpRows)
+
+            // WHEN there are no pinned rows
+            val rows =
+                arrayListOf(
+                    fakeHeadsUpRowRepository(key = "0"),
+                    fakeHeadsUpRowRepository(key = "1"),
+                    fakeHeadsUpRowRepository(key = "2"),
+                )
+            headsUpRepository.setNotifications(
+                rows,
+            )
+            runCurrent()
+
+            // THEN the list is empty
+            assertThat(pinnedHeadsUpRows).isEmpty()
+
+            // WHEN a row gets pinned
+            rows[0].isPinned.value = true
+            runCurrent()
+
+            // THEN it's added to the list
+            assertThat(pinnedHeadsUpRows).containsExactly(rows[0])
+
+            // WHEN more rows are pinned
+            rows[1].isPinned.value = true
+            runCurrent()
+
+            // THEN they are all in the list
+            assertThat(pinnedHeadsUpRows).containsExactly(rows[0], rows[1])
+
+            // WHEN a row gets unpinned
+            rows[0].isPinned.value = false
+            runCurrent()
+
+            // THEN it's removed from the list
+            assertThat(pinnedHeadsUpRows).containsExactly(rows[1])
+        }
+
+    @Test
+    @EnableFlags(NotificationsHeadsUpRefactor.FLAG_NAME)
+    fun testHasPinnedHeadsUpRows_true() =
+        testScope.runTest {
+            val hasPinnedHeadsUpRow by collectLastValue(underTest.hasPinnedHeadsUpRow)
+
+            headsUpRepository.setNotifications(
+                fakeHeadsUpRowRepository(key = "0", isPinned = true),
+                fakeHeadsUpRowRepository(key = "1")
+            )
+            runCurrent()
+
+            assertThat(hasPinnedHeadsUpRow).isTrue()
+        }
+
+    @Test
+    @EnableFlags(NotificationsHeadsUpRefactor.FLAG_NAME)
+    fun testHasPinnedHeadsUpRows_false() =
+        testScope.runTest {
+            val hasPinnedHeadsUpRow by collectLastValue(underTest.hasPinnedHeadsUpRow)
+
+            headsUpRepository.setNotifications(
+                fakeHeadsUpRowRepository(key = "0"),
+                fakeHeadsUpRowRepository(key = "1"),
+            )
+            runCurrent()
+
+            assertThat(hasPinnedHeadsUpRow).isFalse()
+        }
+
+    @Test
+    @EnableFlags(NotificationsHeadsUpRefactor.FLAG_NAME)
+    fun testTopHeadsUpRow_emptyList_null() =
+        testScope.runTest {
+            val topHeadsUpRow by collectLastValue(underTest.topHeadsUpRow)
+
+            headsUpRepository.setNotifications(emptyList())
+            runCurrent()
+
+            assertThat(topHeadsUpRow).isNull()
+        }
+
+    @Test
+    @EnableFlags(NotificationsHeadsUpRefactor.FLAG_NAME)
+    fun testHeadsUpAnimationsEnabled_true() =
+        testScope.runTest {
+            val animationsEnabled by collectLastValue(underTest.headsUpAnimationsEnabled)
+
+            fakeShadeRepository.setQsExpansion(0.0f)
+            fakeKeyguardRepository.setKeyguardShowing(false)
+            runCurrent()
+
+            assertThat(animationsEnabled).isTrue()
+        }
+
+    @Test
+    @EnableFlags(NotificationsHeadsUpRefactor.FLAG_NAME)
+    fun testHeadsUpAnimationsEnabled_keyguardShowing_false() =
+        testScope.runTest {
+            val animationsEnabled by collectLastValue(underTest.headsUpAnimationsEnabled)
+
+            fakeShadeRepository.setQsExpansion(0.0f)
+            fakeKeyguardRepository.setKeyguardShowing(true)
+            runCurrent()
+
+            assertThat(animationsEnabled).isFalse()
+        }
+
+    private fun fakeHeadsUpRowRepository(key: String, isPinned: Boolean = false) =
+        FakeHeadsUpRowRepository(key = key, elementKey = Any()).apply {
+            this.isPinned.value = isPinned
+        }
 }
diff --git a/packages/SystemUI/tests/utils/src/com/android/systemui/statusbar/notification/data/repository/FakeHeadsUpRowRepository.kt b/packages/SystemUI/tests/utils/src/com/android/systemui/statusbar/notification/data/repository/FakeHeadsUpRowRepository.kt
new file mode 100644
index 0000000..2e983a8
--- /dev/null
+++ b/packages/SystemUI/tests/utils/src/com/android/systemui/statusbar/notification/data/repository/FakeHeadsUpRowRepository.kt
@@ -0,0 +1,24 @@
+/*
+ * Copyright (C) 2024 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.statusbar.notification.data.repository
+
+import kotlinx.coroutines.flow.MutableStateFlow
+
+class FakeHeadsUpRowRepository(override val key: String, override val elementKey: Any) :
+    HeadsUpRowRepository {
+    override val isPinned: MutableStateFlow<Boolean> = MutableStateFlow(false)
+}
diff --git a/packages/SystemUI/tests/utils/src/com/android/systemui/statusbar/notification/stack/data/repository/HeadsUpNotificationRepositoryKosmos.kt b/packages/SystemUI/tests/utils/src/com/android/systemui/statusbar/notification/stack/data/repository/HeadsUpNotificationRepositoryKosmos.kt
index 25864ae..165c942 100644
--- a/packages/SystemUI/tests/utils/src/com/android/systemui/statusbar/notification/stack/data/repository/HeadsUpNotificationRepositoryKosmos.kt
+++ b/packages/SystemUI/tests/utils/src/com/android/systemui/statusbar/notification/stack/data/repository/HeadsUpNotificationRepositoryKosmos.kt
@@ -18,11 +18,16 @@
 
 import com.android.systemui.kosmos.Kosmos
 import com.android.systemui.kosmos.Kosmos.Fixture
-import com.android.systemui.statusbar.notification.data.repository.HeadsUpNotificationRepository
+import com.android.systemui.statusbar.notification.data.repository.HeadsUpRepository
+import com.android.systemui.statusbar.notification.data.repository.HeadsUpRowRepository
+import kotlinx.coroutines.flow.Flow
 import kotlinx.coroutines.flow.MutableStateFlow
 
 val Kosmos.headsUpNotificationRepository by Fixture { FakeHeadsUpNotificationRepository() }
 
-class FakeHeadsUpNotificationRepository : HeadsUpNotificationRepository {
-    override val hasPinnedHeadsUp = MutableStateFlow(false)
+class FakeHeadsUpNotificationRepository : HeadsUpRepository {
+    override val headsUpAnimatingAway: MutableStateFlow<Boolean> = MutableStateFlow(false)
+    override val topHeadsUpRow: Flow<HeadsUpRowRepository?> = MutableStateFlow(null)
+    override val activeHeadsUpRows: MutableStateFlow<Set<HeadsUpRowRepository>> =
+        MutableStateFlow(emptySet())
 }
diff --git a/packages/SystemUI/tests/utils/src/com/android/systemui/statusbar/notification/stack/data/repository/HeadsUpNotificationsRepositoryExt.kt b/packages/SystemUI/tests/utils/src/com/android/systemui/statusbar/notification/stack/data/repository/HeadsUpNotificationsRepositoryExt.kt
new file mode 100644
index 0000000..9be7dfe
--- /dev/null
+++ b/packages/SystemUI/tests/utils/src/com/android/systemui/statusbar/notification/stack/data/repository/HeadsUpNotificationsRepositoryExt.kt
@@ -0,0 +1,27 @@
+/*
+ * Copyright (C) 2024 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.statusbar.notification.stack.data.repository
+
+import com.android.systemui.statusbar.notification.data.repository.HeadsUpRowRepository
+
+fun FakeHeadsUpNotificationRepository.setNotifications(notifications: List<HeadsUpRowRepository>) {
+    setNotifications(*notifications.toTypedArray())
+}
+
+fun FakeHeadsUpNotificationRepository.setNotifications(vararg notifications: HeadsUpRowRepository) {
+    this.activeHeadsUpRows.value = notifications.toSet()
+}
diff --git a/packages/SystemUI/tests/utils/src/com/android/systemui/statusbar/notification/stack/ui/viewbinder/NotificationListViewBinderKosmos.kt b/packages/SystemUI/tests/utils/src/com/android/systemui/statusbar/notification/stack/ui/viewbinder/NotificationListViewBinderKosmos.kt
index 2de26f1..ee3216b 100644
--- a/packages/SystemUI/tests/utils/src/com/android/systemui/statusbar/notification/stack/ui/viewbinder/NotificationListViewBinderKosmos.kt
+++ b/packages/SystemUI/tests/utils/src/com/android/systemui/statusbar/notification/stack/ui/viewbinder/NotificationListViewBinderKosmos.kt
@@ -28,6 +28,7 @@
 import com.android.systemui.statusbar.notification.stack.displaySwitchNotificationsHiderTracker
 import com.android.systemui.statusbar.notification.stack.ui.view.notificationStatsLogger
 import com.android.systemui.statusbar.notification.stack.ui.viewmodel.notificationListViewModel
+import com.android.systemui.statusbar.notification.ui.viewbinder.headsUpNotificationViewBinder
 import com.android.systemui.statusbar.phone.notificationIconAreaController
 import java.util.Optional
 
@@ -37,6 +38,7 @@
         backgroundDispatcher = testDispatcher,
         configuration = configurationState,
         falsingManager = falsingManager,
+        hunBinder = headsUpNotificationViewBinder,
         iconAreaController = notificationIconAreaController,
         loggerOptional = Optional.of(notificationStatsLogger),
         metricsLogger = metricsLogger,
diff --git a/packages/SystemUI/tests/utils/src/com/android/systemui/statusbar/notification/stack/ui/viewmodel/NotificationListViewModelKosmos.kt b/packages/SystemUI/tests/utils/src/com/android/systemui/statusbar/notification/stack/ui/viewmodel/NotificationListViewModelKosmos.kt
index 930a4bb..c65d0a3 100644
--- a/packages/SystemUI/tests/utils/src/com/android/systemui/statusbar/notification/stack/ui/viewmodel/NotificationListViewModelKosmos.kt
+++ b/packages/SystemUI/tests/utils/src/com/android/systemui/statusbar/notification/stack/ui/viewmodel/NotificationListViewModelKosmos.kt
@@ -16,6 +16,7 @@
 
 package com.android.systemui.statusbar.notification.stack.ui.viewmodel
 
+import com.android.systemui.keyguard.domain.interactor.keyguardInteractor
 import com.android.systemui.kosmos.Kosmos
 import com.android.systemui.kosmos.Kosmos.Fixture
 import com.android.systemui.kosmos.testDispatcher
@@ -25,6 +26,7 @@
 import com.android.systemui.statusbar.notification.domain.interactor.seenNotificationsInteractor
 import com.android.systemui.statusbar.notification.footer.ui.viewmodel.footerViewModel
 import com.android.systemui.statusbar.notification.shelf.ui.viewmodel.notificationShelfViewModel
+import com.android.systemui.statusbar.notification.stack.domain.interactor.headsUpNotificationInteractor
 import com.android.systemui.statusbar.notification.stack.domain.interactor.notificationStackInteractor
 import com.android.systemui.statusbar.policy.domain.interactor.userSetupInteractor
 import com.android.systemui.statusbar.policy.domain.interactor.zenModeInteractor
@@ -38,6 +40,8 @@
         Optional.of(notificationListLoggerViewModel),
         activeNotificationsInteractor,
         notificationStackInteractor,
+        headsUpNotificationInteractor,
+        keyguardInteractor,
         remoteInputInteractor,
         seenNotificationsInteractor,
         shadeInteractor,
diff --git a/packages/SystemUI/tests/utils/src/com/android/systemui/statusbar/notification/ui/viewbinder/HeadsUpNotificationViewBinderKosmos.kt b/packages/SystemUI/tests/utils/src/com/android/systemui/statusbar/notification/ui/viewbinder/HeadsUpNotificationViewBinderKosmos.kt
new file mode 100644
index 0000000..6a995c0
--- /dev/null
+++ b/packages/SystemUI/tests/utils/src/com/android/systemui/statusbar/notification/ui/viewbinder/HeadsUpNotificationViewBinderKosmos.kt
@@ -0,0 +1,23 @@
+/*
+ * Copyright (C) 2024 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.statusbar.notification.ui.viewbinder
+
+import com.android.systemui.kosmos.Kosmos
+import com.android.systemui.statusbar.notification.stack.ui.viewmodel.notificationListViewModel
+
+val Kosmos.headsUpNotificationViewBinder by
+    Kosmos.Fixture { HeadsUpNotificationViewBinder(viewModel = notificationListViewModel) }