fix: Camera fix (#946)

Co-authored-by: monsieurtanuki <fabrice_fontaine@hotmail.com>

packages/smooth_app/lib/cards/product_cards/knowledge_panels/knowledge_panel_table_card.dart

@@ -1,7 +1,6 @@
 import 'dart:math';
 
 import 'package:flutter/material.dart';
-import 'package:flutter/painting.dart';
 import 'package:flutter_widget_from_html_core/flutter_widget_from_html_core.dart';
 import 'package:openfoodfacts/model/KnowledgePanel.dart';
 import 'package:openfoodfacts/model/KnowledgePanelElement.dart';

packages/smooth_app/lib/cards/product_cards/product_image_carousel.dart

@@ -1,4 +1,3 @@
-import 'package:flutter/cupertino.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter_gen/gen_l10n/app_localizations.dart';
 import 'package:openfoodfacts/model/Product.dart';

packages/smooth_app/lib/cards/product_cards/product_title_card.dart

@@ -1,4 +1,3 @@
-import 'package:flutter/cupertino.dart';
 import 'package:flutter/material.dart';
 import 'package:flutter_gen/gen_l10n/app_localizations.dart';
 import 'package:openfoodfacts/model/Product.dart';

packages/smooth_app/lib/cards/product_cards/question_card.dart

@@ -1,6 +1,5 @@
 import 'package:flutter/material.dart';
 import 'package:flutter_gen/gen_l10n/app_localizations.dart';
-import 'package:openfoodfacts/model/Product.dart';
 import 'package:openfoodfacts/openfoodfacts.dart';
 import 'package:smooth_app/cards/product_cards/product_image_carousel.dart';
 import 'package:smooth_app/cards/product_cards/product_title_card.dart';

packages/smooth_app/lib/data_models/user_preferences.dart

@@ -24,6 +24,7 @@ class UserPreferences extends ChangeNotifier {
       'lastVisitedOnboardingPage';
   static const String _TAG_PREFIX_FLAG = 'FLAG_PREFIX_';
   static const String _TAG_DEV_MODE = 'devMode';
+  static const String _TAG_CAMERA_DECLINE = 'declined_camera_use_once';
 
   Future<void> init(final ProductPreferences productPreferences) async {
     if (_sharedPreferences.getBool(_TAG_INIT) != null) {
@@ -80,6 +81,13 @@ class UserPreferences extends ChangeNotifier {
         : OnboardingPage.values[pageIndex];
   }
 
+  Future<void> setCameraDecline(final bool declined) async {
+    _sharedPreferences.setBool(_TAG_CAMERA_DECLINE, declined);
+  }
+
+  bool get cameraDeclinedOnce =>
+      _sharedPreferences.getBool(_TAG_CAMERA_DECLINE) ?? false;
+
   String _getFlagTag(final String key) => _TAG_PREFIX_FLAG + key;
 
   Future<void> setFlag(

packages/smooth_app/lib/pages/product/nutrition_page.dart

@@ -1,6 +1,5 @@
 import 'package:flutter/material.dart';
 import 'package:openfoodfacts/model/OrderedNutrients.dart';
-import 'package:openfoodfacts/model/Product.dart';
 import 'package:openfoodfacts/openfoodfacts.dart';
 import 'package:openfoodfacts/utils/CountryHelper.dart';
 import 'package:smooth_app/database/product_query.dart';

packages/smooth_app/lib/pages/product/nutrition_page_loaded.dart

@@ -6,7 +6,6 @@ import 'package:openfoodfacts/interface/JsonObject.dart';
 import 'package:openfoodfacts/model/Nutriments.dart';
 import 'package:openfoodfacts/model/OrderedNutrient.dart';
 import 'package:openfoodfacts/model/OrderedNutrients.dart';
-import 'package:openfoodfacts/model/Product.dart';
 import 'package:openfoodfacts/openfoodfacts.dart';
 import 'package:openfoodfacts/utils/UnitHelper.dart';
 import 'package:smooth_app/database/product_query.dart';

packages/smooth_app/lib/pages/product/summary_card.dart

@@ -1,9 +1,7 @@
 import 'package:flutter/material.dart';
-import 'package:flutter/widgets.dart';
 import 'package:flutter_gen/gen_l10n/app_localizations.dart';
 import 'package:openfoodfacts/model/Attribute.dart';
 import 'package:openfoodfacts/model/AttributeGroup.dart';
-import 'package:openfoodfacts/model/Product.dart';
 import 'package:openfoodfacts/openfoodfacts.dart';
 import 'package:openfoodfacts/personalized_search/preference_importance.dart';
 import 'package:smooth_app/cards/data_cards/score_card.dart';

packages/smooth_app/lib/pages/scan/continuous_scan_page.dart

@@ -35,31 +35,37 @@ class _ContinuousScanPageState extends State<ContinuousScanPage> {
           final double carouselHeight = constraints.maxHeight /
               1.81; // roughly 55% of the available height
           final double viewFinderBottomOffset = carouselHeight / 2.0;
+
+          final List<Widget> children = getScannerWidgets(
+            context,
+            constraints,
+            _model,
+          );
+
+          //Insert scanner at the right position
+          children.insert(
+            1,
+            SmoothRevealAnimation(
+              delay: 400,
+              startOffset: Offset.zero,
+              animationCurve: Curves.easeInOutBack,
+              child: QRView(
+                overlay: QrScannerOverlayShape(
+                  // We use [SmoothViewFinder] instead of the overlay.
+                  overlayColor: Colors.transparent,
+                  // This offset adjusts the scanning area on iOS.
+                  cutOutBottomOffset: viewFinderBottomOffset,
+                ),
+                key: _scannerViewKey,
+                onQRViewCreated: setupScanner,
+              ),
+            ),
+          );
+
           return Scaffold(
             appBar: AppBar(toolbarHeight: 0.0),
             body: Stack(
-              children: <Widget>[
+              children: children,
-                SmoothRevealAnimation(
-                  delay: 400,
-                  startOffset: Offset.zero,
-                  animationCurve: Curves.easeInOutBack,
-                  child: QRView(
-                    overlay: QrScannerOverlayShape(
-                      // We use [SmoothViewFinder] instead of the overlay.
-                      overlayColor: Colors.transparent,
-                      // This offset adjusts the scanning area on iOS.
-                      cutOutBottomOffset: viewFinderBottomOffset,
-                    ),
-                    key: _scannerViewKey,
-                    onQRViewCreated: setupScanner,
-                  ),
-                ),
-                ...getScannerWidgets(
-                  context,
-                  constraints,
-                  _model,
-                ),
-              ],
             ),
           );
         },

packages/smooth_app/lib/pages/scan/ml_kit_scan_page.dart

@@ -102,28 +102,33 @@ class MLKitScannerPageState extends State<MLKitScannerPage> {
 
     return LayoutBuilder(
       builder: (BuildContext context, BoxConstraints constraints) {
-        return Stack(
+        final List<Widget> children = getScannerWidgets(
-          fit: StackFit.expand,
+          context,
-          children: <Widget>[
+          constraints,
-            SmoothRevealAnimation(
+          _model,
-              delay: 400,
+        );
-              startOffset: Offset.zero,
+
-              animationCurve: Curves.easeInOutBack,
+        //Inserting the scanner at the right position
-              child: Transform.scale(
+        children.insert(
-                scale: scale,
+          1,
-                child: Center(
+          SmoothRevealAnimation(
-                  child: CameraPreview(
+            delay: 400,
-                    _controller!,
+            startOffset: Offset.zero,
-                  ),
+            animationCurve: Curves.easeInOutBack,
+            child: Transform.scale(
+              scale: scale,
+              child: Center(
+                child: CameraPreview(
+                  _controller!,
                 ),
               ),
             ),
-            ...getScannerWidgets(
+          ),
-              context,
+        );
-              constraints,
+
-              _model,
+        return Stack(
-            ),
+          fit: StackFit.expand,
-          ],
+          children: children,
         );
       },
     );

packages/smooth_app/lib/pages/scan/scan_page.dart

@@ -1,4 +1,5 @@
 import 'package:flutter/material.dart';
+import 'package:permission_handler/permission_handler.dart';
 import 'package:provider/provider.dart';
 import 'package:smooth_app/data_models/continuous_scan_model.dart';
 import 'package:smooth_app/data_models/user_preferences.dart';
@@ -33,6 +34,24 @@ class _ScanPageState extends State<ScanPage> {
     setState(() {});
   }
 
+  Future<PermissionStatus> _permissionCheck(
+      UserPreferences userPreferences) async {
+    final PermissionStatus status = await Permission.camera.status;
+
+    //If is denied, is not restricted by for example parental control and is not already declined once
+    if (status.isDenied &&
+        !status.isRestricted &&
+        !userPreferences.cameraDeclinedOnce) {
+      final PermissionStatus newStatus = await Permission.camera.request();
+      if (!newStatus.isGranted && !newStatus.isLimited) {
+        userPreferences.setCameraDecline(true);
+      }
+      return newStatus;
+    } else {
+      return status;
+    }
+  }
+
   @override
   Widget build(BuildContext context) {
     final UserPreferences userPreferences = context.read<UserPreferences>();
@@ -40,20 +59,43 @@ class _ScanPageState extends State<ScanPage> {
       return const Center(child: CircularProgressIndicator());
     }
 
-    final Widget child;
+    return FutureBuilder<PermissionStatus>(
+      future: _permissionCheck(userPreferences),
+      builder: (
+        BuildContext context,
+        AsyncSnapshot<PermissionStatus> snapshot,
+      ) {
+        if (!snapshot.hasData) {
+          return const Center(child: CircularProgressIndicator());
+        } else if (snapshot.hasError) {
+          return const Center(child: Text('Error'));
+        }
 
-    if (userPreferences.getFlag(
+        // TODO(M123): show no camera access screen
-          UserPreferencesDevMode.userPreferencesFlagUseMLKit,
+        if (snapshot.data!.isDenied ||
-        ) ??
+            snapshot.data!.isPermanentlyDenied ||
-        true) {
+            snapshot.data!.isRestricted) {
-      child = const MLKitScannerPage();
+          const Center(
-    } else {
+            child: Text('No camera access granted'),
-      child = const ContinuousScanPage();
+          );
-    }
+        }
 
-    return ChangeNotifierProvider<ContinuousScanModel>(
+        final Widget child;
-      create: (BuildContext context) => _model!,
+
-      child: child,
+        if (userPreferences.getFlag(
+              UserPreferencesDevMode.userPreferencesFlagUseMLKit,
+            ) ??
+            true) {
+          child = const MLKitScannerPage();
+        } else {
+          child = const ContinuousScanPage();
+        }
+
+        return ChangeNotifierProvider<ContinuousScanModel>(
+          create: (BuildContext context) => _model!,
+          child: child,
+        );
+      },
     );
   }
 }

packages/smooth_app/lib/pages/scan/scan_page_helper.dart

@@ -96,8 +96,8 @@ List<Widget> getScannerWidgets(
         padding: qrScannerPadding,
         child: SvgPicture.asset(
           'assets/actions/scanner_alt_2.svg',
-          width: 60.0,
+          width: scannerSize.width,
-          height: 6,
+          height: scannerSize.height,
           color: Colors.white,
         ),
       ),

packages/smooth_app/pubspec.yaml

@@ -29,10 +29,10 @@ dependencies:
   matomo: ^1.1.0
   modal_bottom_sheet: ^2.0.0
   openfoodfacts: ^1.10.0
-  # Uncomment those lines if you want to use a local version of the openfoodfacts package
 #  openfoodfacts:
 #    path: ../../../openfoodfacts-dart
   package_info_plus: ^1.3.0
+  permission_handler: ^8.3.0
   photo_view: ^0.13.0
   provider: ^6.0.2
   qr_code_scanner: ^0.6.1