Delete sighting

packages/app/lib/locales/app_en.arb

@@ -3,6 +3,7 @@
     "createSightingError": "Something went wrong: {error}",
     "createSightingScreenTitle": "Add Sighting",
     "createSightingSuccess": "Yay, you've successfully added a new sighting to the database",
+    "deleteSighting": "Delete Sighting",
     "editCardCancelButton": "Cancel",
     "editCardSaveButton": "Save",
     "editSpeciesErrorCantRemove": "Species needs to be defined",
@@ -27,9 +28,9 @@
     "imageDeleteConfirmation": "Image deleted.",
     "imageLoadingError": "Could not load image",
     "imageMissingError": "No image given",
+    "localNameCardSaveAction": "Save",
     "localNameCardTitle": "Local Name",
     "localNamesCardTitle": "Local Names",
-    "localNameCardSaveAction": "Save",
     "locationAdd": "Do you want to add a GPS location?",
     "locationAddAction": "Add location to image",
     "locationErrorPermissionDenied": "Location permission was denied",
@@ -57,11 +58,13 @@
     "settingsSystemInfoError": "Could not retrieve system informations",
     "settingsSystemInfoSDK": "Android SDK Version",
     "settingsSystemInformation": "System Information",
+    "sightingDeleteAlertBody": "Are you sure you want to delete this sighting?",
+    "sightingDeleteAlertCancel": "Cancel",
+    "sightingDeleteAlertConfirm": "Delete",
+    "sightingDeleteAlertTitle": "Delete Sighting",
+    "sightingDeleteConfirmation": "Sighting deleted.",
     "sightingScreenTitle": "Sighting",
     "sightingUnspecified": "Unknown species",
-    "speciesScreenTitle": "Species",
-    "usedForCardTitle": "Used For",
-    "usedForTextSave": "Save",
     "speciesCardTitle": "Species",
     "speciesDescription": "Description",
     "speciesScreenTitle": "Species",
@@ -73,5 +76,7 @@
     "taxonomyPhylum": "Phylum",
     "taxonomySpecies": "Species",
     "taxonomySubfamily": "Subfamily",
-    "taxonomyTribe": "Tribe"
+    "taxonomyTribe": "Tribe",
+    "usedForCardTitle": "Used For",
+    "usedForTextSave": "Save"
 }

packages/app/lib/ui/screens/sighting.dart

@@ -18,6 +18,7 @@ import 'package:app/ui/widgets/local_name_field.dart';
 import 'package:app/ui/widgets/note_field.dart';
 import 'package:app/ui/widgets/refresh_provider.dart';
 import 'package:app/ui/widgets/scaffold.dart';
+import 'package:app/ui/widgets/sighting_popup_menu.dart';
 import 'package:app/ui/widgets/species_field.dart';
 import 'package:app/ui/widgets/used_for_field.dart';
 
@@ -33,35 +34,43 @@ class SightingScreen extends StatefulWidget {
 class _SightingScreenState extends State<SightingScreen> {
   @override
   Widget build(BuildContext context) {
-    return MeliScaffold(
-        title: AppLocalizations.of(context)!.sightingScreenTitle,
-        backgroundColor: MeliColors.electric,
-        appBarColor: MeliColors.electric,
-        body: SingleChildScrollView(
-          child: Query(
-              options:
-                  QueryOptions(document: gql(sightingQuery(widget.documentId))),
-              builder: (result, {VoidCallback? refetch, FetchMore? fetchMore}) {
-                if (result.hasException) {
-                  return ErrorCard(message: result.exception.toString());
-                }
-
-                if (result.isLoading) {
-                  return const Center(
-                    child: SizedBox(
-                        width: 50,
-                        height: 50,
-                        child:
-                            CircularProgressIndicator(color: MeliColors.black)),
-                  );
-                }
-
-                final sighting = Sighting.fromJson(
-                    result.data?['sighting'] as Map<String, dynamic>);
-
-                return SightingProfile(sighting);
-              }),
-        ));
+    return Query(
+        options: QueryOptions(document: gql(sightingQuery(widget.documentId))),
+        builder: (result, {VoidCallback? refetch, FetchMore? fetchMore}) {
+          Sighting? sighting;
+
+          if (!result.hasException && !result.isLoading) {
+            sighting = Sighting.fromJson(
+                result.data?['sighting'] as Map<String, dynamic>);
+          }
+
+          return MeliScaffold(
+              title: AppLocalizations.of(context)!.sightingScreenTitle,
+              backgroundColor: MeliColors.electric,
+              appBarColor: MeliColors.electric,
+              actionRight: sighting != null
+                  ? SightingPopupMenu(viewId: sighting.viewId)
+                  : null,
+              body: SingleChildScrollView(
+                child: Builder(builder: (BuildContext context) {
+                  if (result.hasException) {
+                    return ErrorCard(message: result.exception.toString());
+                  }
+
+                  if (result.isLoading) {
+                    return const Center(
+                      child: SizedBox(
+                          width: 50,
+                          height: 50,
+                          child: CircularProgressIndicator(
+                              color: MeliColors.black)),
+                    );
+                  }
+
+                  return SightingProfile(sighting!);
+                }),
+              ));
+        });
   }
 }
 

packages/app/lib/ui/screens/species.dart

@@ -138,11 +138,13 @@ class _SpeciesProfileState extends State<SpeciesProfile> {
               onTap: (DocumentId sightingId) {
                 router.pushNamed(RoutePaths.sighting.name,
                     pathParameters: {'documentId': sightingId}).then((value) {
+                  final refreshProvider = RefreshProvider.of(context);
                   // Force loading the species again after we've returned from
-                  // an updated sighting, to make sure that aggregated data over
-                  // all sightings is up-to-date
-                  if (RefreshProvider.of(context)
-                          .isDirty(RefreshKeys.UpdatedSighting) &&
+                  // an updated or deleted sighting, to make sure that
+                  // aggregated data over all sightings is up-to-date
+                  if ((refreshProvider.isDirty(RefreshKeys.UpdatedSighting) ||
+                          refreshProvider
+                              .isDirty(RefreshKeys.DeletedSighting)) &&
                       widget.refetch != null) {
                     widget.refetch!();
                   }

packages/app/lib/ui/widgets/refresh_provider.dart

@@ -2,14 +2,11 @@
 
 import 'package:flutter/widgets.dart';
 
+/// Actions which might affect other views.
 enum RefreshKeys {
-  /// New sighting got created which might affect other views.
   CreatedSighting,
-
-  /// Sighting got updated with data which might affect other views.
   UpdatedSighting,
-
-  /// Species got updated with data which might affect other views.
+  DeletedSighting,
   UpdatedSpecies,
 }
 

packages/app/lib/ui/widgets/scaffold.dart

@@ -7,6 +7,7 @@ import 'package:app/ui/colors.dart';
 class MeliScaffold extends StatefulWidget {
   final String? title;
   final Widget? body;
+  final Widget? actionRight;
   final Color backgroundColor;
   final Color appBarColor;
   final List<Widget> floatingActionButtons;
@@ -16,6 +17,7 @@ class MeliScaffold extends StatefulWidget {
       {super.key,
       this.body,
       this.title,
+      this.actionRight,
       this.floatingActionButtons = const [],
       this.fabAlignment = MainAxisAlignment.spaceBetween,
       this.appBarColor = MeliColors.flurry,
@@ -35,16 +37,24 @@ class _MeliScaffoldState extends State<MeliScaffold> {
         shadowColor: Colors.black54,
         forceMaterialTransparency: false,
         backgroundColor: widget.appBarColor,
-        title: Row(mainAxisAlignment: MainAxisAlignment.center, children: [
-          IconButton(
-              icon: const Icon(Icons.arrow_back_rounded),
-              onPressed: () {
-                Navigator.of(context).pop();
-              }),
-          const SizedBox(width: 7.0),
-          Text(widget.title!),
-          const SizedBox(width: 35.0),
-        ]),
+        title: Stack(
+          children: [
+            Row(mainAxisAlignment: MainAxisAlignment.center, children: [
+              IconButton(
+                  icon: const Icon(Icons.arrow_back_rounded),
+                  onPressed: () {
+                    Navigator.of(context).pop();
+                  }),
+              const SizedBox(width: 7.0),
+              Text(widget.title!),
+              const SizedBox(width: 35.0),
+            ]),
+            if (widget.actionRight != null)
+              Row(
+                  mainAxisAlignment: MainAxisAlignment.end,
+                  children: [widget.actionRight!]),
+          ],
+        ),
       );
     }
 

packages/app/lib/ui/widgets/sighting_popup_menu.dart

@@ -0,0 +1,61 @@
+// SPDX-License-Identifier: AGPL-3.0-or-later
+
+import 'package:flutter/material.dart';
+import 'package:flutter_gen/gen_l10n/app_localizations.dart';
+
+import 'package:app/io/p2panda/publish.dart';
+import 'package:app/models/sightings.dart';
+import 'package:app/router.dart';
+import 'package:app/ui/widgets/confirm_dialog.dart';
+import 'package:app/ui/widgets/refresh_provider.dart';
+
+class SightingPopupMenu extends StatelessWidget {
+  final DocumentViewId viewId;
+
+  const SightingPopupMenu({super.key, required this.viewId});
+
+  void _onDelete(BuildContext context) {
+    final messenger = ScaffoldMessenger.of(context);
+    final t = AppLocalizations.of(context)!;
+    final refreshProvider = RefreshProvider.of(context);
+
+    showDialog<String>(
+      context: context,
+      builder: (BuildContext context) => ConfirmDialog(
+        title: t.sightingDeleteAlertTitle,
+        message: t.sightingDeleteAlertBody,
+        labelAbort: t.sightingDeleteAlertCancel,
+        labelConfirm: t.sightingDeleteAlertConfirm,
+        onConfirm: () async {
+          // @TODO: also delete all uses documents and hive location documents.
+          await deleteSighting(viewId);
+
+          // Set flag for other widgets to tell them that they might need to
+          // re-render their data. This will make sure that our updates are
+          // reflected in the UI
+          refreshProvider.setDirty(RefreshKeys.DeletedSighting);
+
+          // First pop closes this dialog, second goes back to the view we came
+          // from
+          router.pop();
+          router.pop();
+
+          messenger.showSnackBar(
+              SnackBar(content: Text(t.sightingDeleteConfirmation)));
+        },
+      ),
+    );
+  }
+
+  @override
+  Widget build(BuildContext context) {
+    return PopupMenuButton(
+        itemBuilder: (BuildContext context) => [
+              PopupMenuItem<void>(
+                  child: Text(AppLocalizations.of(context)!.deleteSighting),
+                  onTap: () {
+                    _onDelete(context);
+                  }),
+            ]);
+  }
+}

packages/app/lib/ui/widgets/sightings_list.dart

@@ -23,9 +23,11 @@ class _SightingsListState extends State<SightingsList> {
     return SightingCard(
         onTap: () => router.pushNamed(RoutePaths.sighting.name,
                 pathParameters: {'documentId': sighting.id}).then((value) {
-              // Refresh list when we've returned from updating a sighting
-              if (RefreshProvider.of(context)
-                      .isDirty(RefreshKeys.UpdatedSighting) &&
+              final refreshProvider = RefreshProvider.of(context);
+              // Refresh list when we've returned from updating or deleting a
+              // sighting
+              if ((refreshProvider.isDirty(RefreshKeys.UpdatedSighting) ||
+                      refreshProvider.isDirty(RefreshKeys.DeletedSighting)) &&
                   widget.paginator.refresh != null) {
                 widget.paginator.refresh!();
               }