Merge "Remove widget from hub when its package is uninstalled" into main
diff --git a/packages/SystemUI/multivalentTests/src/com/android/systemui/communal/ui/widgets/CommunalAppWidgetHostTest.kt b/packages/SystemUI/multivalentTests/src/com/android/systemui/communal/ui/widgets/CommunalAppWidgetHostTest.kt
index 3aa99c4..89a4c04 100644
--- a/packages/SystemUI/multivalentTests/src/com/android/systemui/communal/ui/widgets/CommunalAppWidgetHostTest.kt
+++ b/packages/SystemUI/multivalentTests/src/com/android/systemui/communal/ui/widgets/CommunalAppWidgetHostTest.kt
@@ -23,16 +23,27 @@
 import com.android.systemui.SysuiTestCase
 import com.android.systemui.communal.widgets.CommunalAppWidgetHost
 import com.android.systemui.communal.widgets.CommunalAppWidgetHostView
+import com.android.systemui.coroutines.collectLastValue
+import com.android.systemui.kosmos.applicationCoroutineScope
+import com.android.systemui.kosmos.testScope
+import com.android.systemui.log.logcatLogBuffer
+import com.android.systemui.testKosmos
 import com.android.systemui.util.mockito.mock
 import com.google.common.truth.Truth.assertThat
+import kotlinx.coroutines.ExperimentalCoroutinesApi
+import kotlinx.coroutines.test.runCurrent
+import kotlinx.coroutines.test.runTest
 import org.junit.Before
 import org.junit.Test
 import org.junit.runner.RunWith
 
+@OptIn(ExperimentalCoroutinesApi::class)
 @SmallTest
 @RunWithLooper(setAsMainLooper = true)
 @RunWith(AndroidJUnit4::class)
 class CommunalAppWidgetHostTest : SysuiTestCase() {
+    private val kosmos = testKosmos()
+    private val testScope = kosmos.testScope
 
     private lateinit var testableLooper: TestableLooper
     private lateinit var underTest: CommunalAppWidgetHost
@@ -43,9 +54,11 @@
         underTest =
             CommunalAppWidgetHost(
                 context = context,
+                backgroundScope = kosmos.applicationCoroutineScope,
                 hostId = 116,
                 interactionHandler = mock(),
-                looper = testableLooper.looper
+                looper = testableLooper.looper,
+                logBuffer = logcatLogBuffer("CommunalAppWidgetHostTest"),
             )
     }
 
@@ -64,4 +77,23 @@
         assertThat(view).isNotNull()
         assertThat(view.appWidgetId).isEqualTo(appWidgetId)
     }
+
+    @Test
+    fun appWidgetIdToRemove_emit() =
+        testScope.runTest {
+            val appWidgetIdToRemove by collectLastValue(underTest.appWidgetIdToRemove)
+
+            // Nothing should be emitted yet
+            assertThat(appWidgetIdToRemove).isNull()
+
+            underTest.onAppWidgetRemoved(appWidgetId = 1)
+            runCurrent()
+
+            assertThat(appWidgetIdToRemove).isEqualTo(1)
+
+            underTest.onAppWidgetRemoved(appWidgetId = 2)
+            runCurrent()
+
+            assertThat(appWidgetIdToRemove).isEqualTo(2)
+        }
 }
diff --git a/packages/SystemUI/multivalentTests/src/com/android/systemui/communal/widgets/CommunalAppWidgetHostStartableTest.kt b/packages/SystemUI/multivalentTests/src/com/android/systemui/communal/widgets/CommunalAppWidgetHostStartableTest.kt
index a3654b6..032d76f 100644
--- a/packages/SystemUI/multivalentTests/src/com/android/systemui/communal/widgets/CommunalAppWidgetHostStartableTest.kt
+++ b/packages/SystemUI/multivalentTests/src/com/android/systemui/communal/widgets/CommunalAppWidgetHostStartableTest.kt
@@ -21,14 +21,21 @@
 import androidx.test.filters.SmallTest
 import com.android.systemui.SysuiTestCase
 import com.android.systemui.communal.data.repository.fakeCommunalRepository
+import com.android.systemui.communal.data.repository.fakeCommunalWidgetRepository
 import com.android.systemui.communal.domain.interactor.communalInteractor
+import com.android.systemui.communal.shared.model.CommunalWidgetContentModel
+import com.android.systemui.coroutines.collectLastValue
 import com.android.systemui.keyguard.data.repository.fakeKeyguardRepository
 import com.android.systemui.kosmos.applicationCoroutineScope
 import com.android.systemui.kosmos.testDispatcher
 import com.android.systemui.kosmos.testScope
 import com.android.systemui.testKosmos
 import com.android.systemui.user.data.repository.fakeUserRepository
+import com.android.systemui.util.mockito.mock
+import com.android.systemui.util.mockito.whenever
+import com.google.common.truth.Truth.assertThat
 import kotlinx.coroutines.ExperimentalCoroutinesApi
+import kotlinx.coroutines.flow.MutableSharedFlow
 import kotlinx.coroutines.test.runCurrent
 import kotlinx.coroutines.test.runTest
 import org.junit.Before
@@ -47,6 +54,8 @@
 
     @Mock private lateinit var appWidgetHost: CommunalAppWidgetHost
 
+    private lateinit var appWidgetIdToRemove: MutableSharedFlow<Int>
+
     private lateinit var underTest: CommunalAppWidgetHostStartable
 
     @Before
@@ -54,6 +63,9 @@
         MockitoAnnotations.initMocks(this)
         kosmos.fakeUserRepository.setUserInfos(listOf(MAIN_USER_INFO))
 
+        appWidgetIdToRemove = MutableSharedFlow()
+        whenever(appWidgetHost.appWidgetIdToRemove).thenReturn(appWidgetIdToRemove)
+
         underTest =
             CommunalAppWidgetHostStartable(
                 appWidgetHost,
@@ -120,6 +132,38 @@
             }
         }
 
+    @Test
+    fun removeAppWidgetReportedByHost() =
+        with(kosmos) {
+            testScope.runTest {
+                // Set up communal widgets
+                val widget1 =
+                    mock<CommunalWidgetContentModel> { whenever(this.appWidgetId).thenReturn(1) }
+                val widget2 =
+                    mock<CommunalWidgetContentModel> { whenever(this.appWidgetId).thenReturn(2) }
+                val widget3 =
+                    mock<CommunalWidgetContentModel> { whenever(this.appWidgetId).thenReturn(3) }
+                fakeCommunalWidgetRepository.setCommunalWidgets(listOf(widget1, widget2, widget3))
+
+                underTest.start()
+
+                // Assert communal widgets has 3
+                val communalWidgets by
+                    collectLastValue(fakeCommunalWidgetRepository.communalWidgets)
+                assertThat(communalWidgets).containsExactly(widget1, widget2, widget3)
+
+                // Report app widget 1 to remove and assert widget removed
+                appWidgetIdToRemove.emit(1)
+                runCurrent()
+                assertThat(communalWidgets).containsExactly(widget2, widget3)
+
+                // Report app widget 3 to remove and assert widget removed
+                appWidgetIdToRemove.emit(3)
+                runCurrent()
+                assertThat(communalWidgets).containsExactly(widget2)
+            }
+        }
+
     private suspend fun setCommunalAvailable(available: Boolean) =
         with(kosmos) {
             fakeKeyguardRepository.setIsEncryptedOrLockdown(false)
diff --git a/packages/SystemUI/src/com/android/systemui/communal/data/repository/CommunalWidgetRepositoryModule.kt b/packages/SystemUI/src/com/android/systemui/communal/data/repository/CommunalWidgetRepositoryModule.kt
index ab0a2d0d..d7f163b 100644
--- a/packages/SystemUI/src/com/android/systemui/communal/data/repository/CommunalWidgetRepositoryModule.kt
+++ b/packages/SystemUI/src/com/android/systemui/communal/data/repository/CommunalWidgetRepositoryModule.kt
@@ -26,6 +26,7 @@
 import com.android.systemui.communal.widgets.WidgetInteractionHandler
 import com.android.systemui.dagger.SysUISingleton
 import com.android.systemui.dagger.qualifiers.Application
+import com.android.systemui.dagger.qualifiers.Background
 import com.android.systemui.dagger.qualifiers.Main
 import com.android.systemui.log.LogBuffer
 import com.android.systemui.log.dagger.CommunalLog
@@ -35,6 +36,7 @@
 import dagger.Provides
 import java.util.Optional
 import javax.inject.Named
+import kotlinx.coroutines.CoroutineScope
 
 @Module
 interface CommunalWidgetRepositoryModule {
@@ -52,10 +54,19 @@
         @Provides
         fun provideCommunalAppWidgetHost(
             @Application context: Context,
+            @Background backgroundScope: CoroutineScope,
             interactionHandler: WidgetInteractionHandler,
             @Main looper: Looper,
+            @CommunalLog logBuffer: LogBuffer,
         ): CommunalAppWidgetHost {
-            return CommunalAppWidgetHost(context, APP_WIDGET_HOST_ID, interactionHandler, looper)
+            return CommunalAppWidgetHost(
+                context,
+                backgroundScope,
+                APP_WIDGET_HOST_ID,
+                interactionHandler,
+                looper,
+                logBuffer,
+            )
         }
 
         @SysUISingleton
diff --git a/packages/SystemUI/src/com/android/systemui/communal/widgets/CommunalAppWidgetHost.kt b/packages/SystemUI/src/com/android/systemui/communal/widgets/CommunalAppWidgetHost.kt
index 61db026..5f1d89e 100644
--- a/packages/SystemUI/src/com/android/systemui/communal/widgets/CommunalAppWidgetHost.kt
+++ b/packages/SystemUI/src/com/android/systemui/communal/widgets/CommunalAppWidgetHost.kt
@@ -22,14 +22,31 @@
 import android.content.Context
 import android.os.Looper
 import android.widget.RemoteViews
+import com.android.systemui.log.LogBuffer
+import com.android.systemui.log.core.Logger
+import kotlinx.coroutines.CoroutineScope
+import kotlinx.coroutines.flow.MutableSharedFlow
+import kotlinx.coroutines.flow.SharedFlow
+import kotlinx.coroutines.flow.asSharedFlow
+import kotlinx.coroutines.launch
 
 /** Communal app widget host that creates a [CommunalAppWidgetHostView]. */
 class CommunalAppWidgetHost(
     context: Context,
+    private val backgroundScope: CoroutineScope,
     hostId: Int,
     interactionHandler: RemoteViews.InteractionHandler,
-    looper: Looper
+    looper: Looper,
+    logBuffer: LogBuffer,
 ) : AppWidgetHost(context, hostId, interactionHandler, looper) {
+
+    private val logger = Logger(logBuffer, TAG)
+
+    private val _appWidgetIdToRemove = MutableSharedFlow<Int>()
+
+    /** App widget ids that have been removed and no longer available. */
+    val appWidgetIdToRemove: SharedFlow<Int> = _appWidgetIdToRemove.asSharedFlow()
+
     override fun onCreateView(
         context: Context,
         appWidgetId: Int,
@@ -52,4 +69,15 @@
         // `createView`, but we are sure that the hostView is `CommunalAppWidgetHostView`
         return createView(context, appWidgetId, appWidget) as CommunalAppWidgetHostView
     }
+
+    override fun onAppWidgetRemoved(appWidgetId: Int) {
+        backgroundScope.launch {
+            logger.i({ "App widget removed from system: $int1" }) { int1 = appWidgetId }
+            _appWidgetIdToRemove.emit(appWidgetId)
+        }
+    }
+
+    companion object {
+        private const val TAG = "CommunalAppWidgetHost"
+    }
 }
diff --git a/packages/SystemUI/src/com/android/systemui/communal/widgets/CommunalAppWidgetHostStartable.kt b/packages/SystemUI/src/com/android/systemui/communal/widgets/CommunalAppWidgetHostStartable.kt
index 586df32..fb9abeb 100644
--- a/packages/SystemUI/src/com/android/systemui/communal/widgets/CommunalAppWidgetHostStartable.kt
+++ b/packages/SystemUI/src/com/android/systemui/communal/widgets/CommunalAppWidgetHostStartable.kt
@@ -40,6 +40,7 @@
     @Background private val bgScope: CoroutineScope,
     @Main private val uiDispatcher: CoroutineDispatcher
 ) : CoreStartable {
+
     override fun start() {
         or(communalInteractor.isCommunalAvailable, communalInteractor.editModeOpen)
             // Only trigger updates on state changes, ignoring the initial false value.
@@ -47,6 +48,10 @@
             .filter { (previous, new) -> previous != new }
             .onEach { (_, shouldListen) -> updateAppWidgetHostActive(shouldListen) }
             .launchIn(bgScope)
+
+        appWidgetHost.appWidgetIdToRemove
+            .onEach { appWidgetId -> communalInteractor.deleteWidget(appWidgetId) }
+            .launchIn(bgScope)
     }
 
     private suspend fun updateAppWidgetHostActive(active: Boolean) =
diff --git a/packages/SystemUI/tests/utils/src/com/android/systemui/communal/data/repository/FakeCommunalWidgetRepository.kt b/packages/SystemUI/tests/utils/src/com/android/systemui/communal/data/repository/FakeCommunalWidgetRepository.kt
index bc7e7af..fab64e3 100644
--- a/packages/SystemUI/tests/utils/src/com/android/systemui/communal/data/repository/FakeCommunalWidgetRepository.kt
+++ b/packages/SystemUI/tests/utils/src/com/android/systemui/communal/data/repository/FakeCommunalWidgetRepository.kt
@@ -36,6 +36,14 @@
         }
     }
 
+    override fun deleteWidget(widgetId: Int) {
+        if (_communalWidgets.value.none { it.appWidgetId == widgetId }) {
+            return
+        }
+
+        _communalWidgets.value = _communalWidgets.value.filter { it.appWidgetId != widgetId }
+    }
+
     private fun onConfigured(id: Int, providerInfo: AppWidgetProviderInfo, priority: Int) {
         _communalWidgets.value += listOf(CommunalWidgetContentModel(id, providerInfo, priority))
     }