Display a snackbar when draft is restored

config/detekt/baseline.xml

@@ -2,8 +2,7 @@
 <SmellBaseline>
   <ManuallySuppressedIssues></ManuallySuppressedIssues>
   <CurrentIssues>
-    <ID>MemberNameEqualsClassName:FusedLocationProviderClient.kt$FusedLocationProviderClient$private val fusedLocationProviderClient: FusedLocationProviderClient</ID>
-    <ID>MemberNameEqualsClassName:SettingsClient.kt$SettingsClient$private val settingsClient: SettingsClient</ID>
+    <ID>ReturnCount:HomeScreenViewModel.kt$HomeScreenViewModel$suspend fun getDraftSubmission(): DraftSubmission?</ID>
     <ID>UnusedPrivateProperty:HomeScreenFragmentTest.kt$NavigationDrawerItemClickTest$private val testLabel: String</ID>
   </CurrentIssues>
 </SmellBaseline>

ground/src/main/java/com/google/android/ground/ui/home/HomeScreenFragment.kt

@@ -33,9 +33,12 @@ import com.google.android.ground.R
 import com.google.android.ground.databinding.HomeScreenFragBinding
 import com.google.android.ground.databinding.NavDrawerHeaderBinding
 import com.google.android.ground.model.User
+import com.google.android.ground.persistence.local.room.converter.SubmissionDeltasConverter
 import com.google.android.ground.repository.UserRepository
 import com.google.android.ground.ui.common.AbstractFragment
 import com.google.android.ground.ui.common.BackPressListener
+import com.google.android.ground.ui.common.EphemeralPopups
+import com.google.android.ground.ui.common.Navigator
 import com.google.android.ground.ui.theme.AppTheme
 import com.google.android.ground.util.systemInsets
 import com.google.android.material.imageview.ShapeableImageView
@@ -56,6 +59,8 @@ class HomeScreenFragment :
   // TODO: It's not obvious which locations of interest are in HomeScreen vs MapContainer;
   //  make this more intuitive.
 
+  @Inject lateinit var ephemeralPopups: EphemeralPopups
+  @Inject lateinit var navigator: Navigator
   @Inject lateinit var userRepository: UserRepository
   private lateinit var binding: HomeScreenFragBinding
   private lateinit var homeScreenViewModel: HomeScreenViewModel
@@ -100,7 +105,21 @@ class HomeScreenFragment :
     updateNavHeader()
     // Re-open data collection screen if any drafts are present
     viewLifecycleOwner.lifecycleScope.launch {
-      homeScreenViewModel.maybeNavigateToDraftSubmission()
+      homeScreenViewModel.getDraftSubmission()?.let { draft ->
+        navigator.navigate(
+          HomeScreenFragmentDirections.actionHomeScreenFragmentToDataCollectionFragment(
+            draft.loiId,
+            draft.loiName ?: "",
+            draft.jobId,
+            true,
+            SubmissionDeltasConverter.toString(draft.deltas),
+          )
+        )
+
+        ephemeralPopups
+          .InfoPopup(binding.root, R.string.draft_restored, EphemeralPopups.PopupDuration.SHORT)
+          .show()
+      }
     }
   }
 

ground/src/main/java/com/google/android/ground/ui/home/HomeScreenViewModel.kt

@@ -18,8 +18,8 @@ package com.google.android.ground.ui.home
 import androidx.lifecycle.LiveData
 import androidx.lifecycle.MutableLiveData
 import androidx.lifecycle.viewModelScope
+import com.google.android.ground.model.submission.DraftSubmission
 import com.google.android.ground.persistence.local.LocalValueStore
-import com.google.android.ground.persistence.local.room.converter.SubmissionDeltasConverter
 import com.google.android.ground.repository.OfflineAreaRepository
 import com.google.android.ground.repository.SubmissionRepository
 import com.google.android.ground.repository.SurveyRepository
@@ -53,33 +53,25 @@ internal constructor(
   // TODO(#1730): Allow tile source configuration from a non-survey accessible source.
   val showOfflineAreaMenuItem: LiveData<Boolean> = MutableLiveData(true)
 
-  suspend fun maybeNavigateToDraftSubmission() {
+  /** Attempts to return draft submission for the currently active survey. */
+  suspend fun getDraftSubmission(): DraftSubmission? {
     val draftId = localValueStore.draftSubmissionId
     val survey = surveyRepository.activeSurvey
 
-    // Missing draft submission
     if (draftId.isNullOrEmpty() || survey == null) {
-      return
+      // Missing draft submission
+      return null
     }
 
-    val draft = submissionRepository.getDraftSubmission(draftId, survey)
+    val draft = submissionRepository.getDraftSubmission(draftId, survey) ?: return null
 
-    // TODO: Check whether the previous user id matches with current user or not.
-    if (draft != null && draft.surveyId == survey.id) {
-      navigator.navigate(
-        HomeScreenFragmentDirections.actionHomeScreenFragmentToDataCollectionFragment(
-          draft.loiId,
-          draft.loiName ?: "",
-          draft.jobId,
-          true,
-          SubmissionDeltasConverter.toString(draft.deltas),
-        )
-      )
-    }
-
-    if (draft != null && draft.surveyId != survey.id) {
+    if (draft.surveyId != survey.id) {
       Timber.e("Skipping draft submission, survey id doesn't match")
+      return null
     }
+
+    // TODO: Check whether the previous user id matches with current user or not.
+    return draft
   }
 
   fun openNavDrawer() {

ground/src/main/res/values/strings.xml

@@ -187,4 +187,5 @@
     ## Public data sharing
     \nSurvey organizers may share and use data publicly under the *Creative Commons CC0 1.0 License*:
   </string>
+  <string name="draft_restored">App was closed. Unsaved data restored.</string>
 </resources>