[fenix] Close https://github.com/mozilla-mobile/fenix/issues/26150: Do not show sync tabs in home when sync open tabs setting is disabled

app/src/main/java/org/mozilla/fenix/HomeActivity.kt

@@ -300,6 +300,15 @@ open class HomeActivity : LocaleAwareAppCompatActivity(), NavHostActivity {
             }
         }
 
+        components.backgroundServices.accountManagerAvailableQueue.runIfReadyOrQueue {
+            lifecycleScope.launch(IO) {
+                // If we're authenticated, kick-off a sync and a device state refresh.
+                components.backgroundServices.accountManager.authenticatedAccount()?.let {
+                    components.backgroundServices.accountManager.syncNow(reason = SyncReason.Startup)
+                }
+            }
+        }
+
         components.core.engine.profiler?.addMarker(
             MarkersActivityLifecycleCallbacks.MARKER_NAME, startTimeProfiler, "HomeActivity.onCreate"
         )
@@ -336,23 +345,6 @@ open class HomeActivity : LocaleAwareAppCompatActivity(), NavHostActivity {
             message = "onResume()"
         )
 
-        components.backgroundServices.accountManagerAvailableQueue.runIfReadyOrQueue {
-            lifecycleScope.launch {
-                // If we're authenticated, kick-off a sync and a device state refresh.
-                components.backgroundServices.accountManager.authenticatedAccount()?.let {
-                    val syncReason = when (isVisuallyComplete) {
-                        true -> SyncReason.User
-                        false -> SyncReason.Startup
-                    }
-
-                    components.backgroundServices.accountManager.syncNow(
-                        reason = syncReason,
-                        debounce = true
-                    )
-                }
-            }
-        }
-
         lifecycleScope.launch(IO) {
             try {
                 if (settings().showContileFeature) {

app/src/main/java/org/mozilla/fenix/home/HomeFragment.kt

@@ -281,6 +281,7 @@ class HomeFragment : Fragment() {
             if (requireContext().settings().enableTaskContinuityEnhancements) {
                 recentSyncedTabFeature.set(
                     feature = RecentSyncedTabFeature(
+                        context = requireContext(),
                         appStore = requireComponents.appStore,
                         syncStore = requireComponents.backgroundServices.syncStore,
                         storage = requireComponents.backgroundServices.syncedTabsStorage,

app/src/main/java/org/mozilla/fenix/home/recentsyncedtabs/RecentSyncedTabFeature.kt

@@ -4,6 +4,7 @@
 
 package org.mozilla.fenix.home.recentsyncedtabs
 
+import android.content.Context
 import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.flow.launchIn
 import kotlinx.coroutines.flow.onEach
@@ -12,6 +13,7 @@ import mozilla.components.feature.syncedtabs.storage.SyncedTabsStorage
 import mozilla.components.lib.state.ext.flow
 import mozilla.components.service.fxa.SyncEngine
 import mozilla.components.service.fxa.manager.FxaAccountManager
+import mozilla.components.service.fxa.manager.SyncEnginesStorage
 import mozilla.components.service.fxa.manager.ext.withConstellation
 import mozilla.components.service.fxa.store.SyncStatus
 import mozilla.components.service.fxa.store.SyncStore
@@ -33,6 +35,7 @@ import org.mozilla.fenix.GleanMetrics.RecentSyncedTabs
  * @property coroutineScope The scope to collect Sync state Flow updates in.
  */
 class RecentSyncedTabFeature(
+    private val context: Context,
     private val appStore: AppStore,
     private val syncStore: SyncStore,
     private val storage: SyncedTabsStorage,
@@ -62,7 +65,6 @@ class RecentSyncedTabFeature(
                     accountManager.withConstellation { refreshDevices() }
                     accountManager.syncNow(
                         reason = SyncReason.User,
-                        debounce = true,
                         customEngineSubset = listOf(SyncEngine.Tabs),
                     )
                 }
@@ -94,6 +96,14 @@ class RecentSyncedTabFeature(
     }
 
     private suspend fun dispatchSyncedTabs() {
+        if (!isSyncedTabsEngineEnabled()) {
+            appStore.dispatch(
+                AppAction.RecentSyncedTabStateChange(RecentSyncedTabState.None)
+            )
+
+            return
+        }
+
         val syncedTab = storage.getSyncedDeviceTabs()
             .filterNot { it.device.isCurrentDevice || it.tabs.isEmpty() }
             .maxByOrNull { it.device.lastAccessTime ?: 0 }
@@ -106,13 +116,20 @@ class RecentSyncedTabFeature(
                     url = tab.url,
                     iconUrl = tab.iconUrl
                 )
-            } ?: return
+            }
+
+        if (syncedTab == null) {
+            appStore.dispatch(
+                AppAction.RecentSyncedTabStateChange(RecentSyncedTabState.None)
+            )
+        } else {
             recordMetrics(syncedTab, lastSyncedTab, syncStartId)
             appStore.dispatch(
                 AppAction.RecentSyncedTabStateChange(RecentSyncedTabState.Success(syncedTab))
             )
             lastSyncedTab = syncedTab
         }
+    }
 
     private fun onError() {
         if (appStore.state.recentSyncedTabState == RecentSyncedTabState.Loading) {
@@ -131,6 +148,10 @@ class RecentSyncedTabFeature(
             RecentSyncedTabs.latestSyncedTabIsStale.add()
         }
     }
+
+    private fun isSyncedTabsEngineEnabled(): Boolean {
+        return SyncEnginesStorage(context).getStatus()[SyncEngine.Tabs] ?: true
+    }
 }
 
 /**

app/src/main/java/org/mozilla/fenix/home/recenttabs/view/RecentTabViewHolder.kt

@@ -67,16 +67,11 @@ class RecentTabViewHolder(
             )
 
             recentSyncedTabState.value?.let {
-                if (components.settings.enableTaskContinuityEnhancements && it != RecentSyncedTabState.None) {
+                if (components.settings.enableTaskContinuityEnhancements && it is RecentSyncedTabState.Success) {
                     Spacer(modifier = Modifier.height(8.dp))
 
-                    val syncedTab = when (it) {
-                        RecentSyncedTabState.None,
-                        RecentSyncedTabState.Loading -> null
-                        is RecentSyncedTabState.Success -> it.tab
-                    }
                     RecentSyncedTab(
-                        tab = syncedTab,
+                        tab = it.tab,
                         onRecentSyncedTabClick = { tab ->
                             recentSyncedTabInteractor.onRecentSyncedTabClicked(tab)
                         },

app/src/test/java/org/mozilla/fenix/home/recentsyncedtabs/RecentSyncedTabFeatureTest.kt

@@ -9,6 +9,7 @@ import io.mockk.coEvery
 import io.mockk.coVerify
 import io.mockk.every
 import io.mockk.mockk
+import io.mockk.mockkConstructor
 import io.mockk.verify
 import kotlinx.coroutines.Dispatchers
 import kotlinx.coroutines.test.StandardTestDispatcher
@@ -24,6 +25,7 @@ import mozilla.components.concept.sync.DeviceType
 import mozilla.components.feature.syncedtabs.storage.SyncedTabsStorage
 import mozilla.components.service.fxa.SyncEngine
 import mozilla.components.service.fxa.manager.FxaAccountManager
+import mozilla.components.service.fxa.manager.SyncEnginesStorage
 import mozilla.components.service.fxa.manager.ext.withConstellation
 import mozilla.components.service.fxa.store.Account
 import mozilla.components.service.fxa.store.SyncAction
@@ -97,8 +99,13 @@ class RecentSyncedTabFeatureTest {
         Dispatchers.setMain(StandardTestDispatcher())
 
         every { appStore.dispatch(any()) } returns mockk()
+        mockkConstructor(SyncEnginesStorage::class)
+        every { anyConstructed<SyncEnginesStorage>().getStatus() } returns mapOf(
+            SyncEngine.Tabs to true
+        )
 
         feature = RecentSyncedTabFeature(
+            context = testContext,
             appStore = appStore,
             syncStore = syncStore,
             accountManager = accountManager,
@@ -128,7 +135,7 @@ class RecentSyncedTabFeatureTest {
 
         verify { appStore.dispatch(AppAction.RecentSyncedTabStateChange(RecentSyncedTabState.Loading)) }
         coVerify { accountManager.withConstellation { refreshDevices() } }
-        coVerify { accountManager.syncNow(reason = SyncReason.User, debounce = true, customEngineSubset = listOf(SyncEngine.Tabs)) }
+        coVerify { accountManager.syncNow(reason = SyncReason.User, customEngineSubset = listOf(SyncEngine.Tabs)) }
     }
 
     @Test
@@ -249,6 +256,34 @@ class RecentSyncedTabFeatureTest {
         }
     }
 
+    @Test
+    fun `GIVEN sync tabs are disabled WHEN dispatching recent synced tab THEN dispatch none`() = runTest {
+        val account = mockk<Account>()
+        syncStore.setState(account = account)
+        every { appStore.state } returns mockk {
+            every { recentSyncedTabState } returns RecentSyncedTabState.Loading
+        }
+        every { anyConstructed<SyncEnginesStorage>().getStatus() } returns mapOf(
+            SyncEngine.Tabs to false
+        )
+
+        val firstTab = createActiveTab("remote", "https://mozilla.org", null)
+        val syncedTabs = listOf(
+            SyncedDeviceTabs(deviceAccessed1, listOf(firstTab)),
+        )
+        coEvery { storage.getSyncedDeviceTabs() } returns syncedTabs
+
+        feature.start()
+        syncStore.setState(status = SyncStatus.Idle)
+        runCurrent()
+
+        verify {
+            appStore.dispatch(
+                AppAction.RecentSyncedTabStateChange(RecentSyncedTabState.None)
+            )
+        }
+    }
+
     @Test
     fun `WHEN synced tab dispatched THEN labeled counter metric recorded with device type`() = runTest {
         val account = mockk<Account>()