added hive as local database

.vscode/settings.json

@@ -1,3 +1,7 @@
 {
-    "cmake.sourceDirectory": "${workspaceFolder}/ios/Classes/src"
+    "cmake.sourceDirectory": "${workspaceFolder}/ios/Classes/src",
+    "files.associations": {
+        "__config": "cpp",
+        "__nullptr": "cpp"
+    }
 }

example/lib/main.dart

@@ -1,6 +1,7 @@
 import 'package:flutter/material.dart';
 import 'package:flutter_localizations/flutter_localizations.dart';
 import 'package:flutter_mobx/flutter_mobx.dart';
+import 'package:flutter_zxing_example/utils/db_service.dart';
 import 'package:flutter_zxing_example/utils/extensions.dart';
 import 'package:nb_utils/nb_utils.dart';
 
@@ -13,6 +14,7 @@ import 'utils/scroll_behavior.dart';
 void main() async {
   WidgetsFlutterBinding.ensureInitialized();
   await _initializeAppStore();
+  await DbService.instance.initializeApp();
   runApp(const MyApp());
 }
 

example/lib/models/code.dart

@@ -0,0 +1,24 @@
+import 'package:flutter_zxing/flutter_zxing.dart';
+import 'package:hive_flutter/hive_flutter.dart';
+
+part "code.g.dart";
+
+@HiveType(typeId: 0)
+class Code extends HiveObject {
+  @HiveField(0)
+  bool? isValid;
+
+  @HiveField(1)
+  int? format;
+
+  @HiveField(2)
+  String? text;
+
+  Code();
+
+  Code.fromCodeResult(CodeResult result) {
+    isValid = result.isValidBool;
+    format = result.format;
+    text = result.textString;
+  }
+}

example/lib/models/code.g.dart

@@ -0,0 +1,46 @@
+// GENERATED CODE - DO NOT MODIFY BY HAND
+
+part of 'code.dart';
+
+// **************************************************************************
+// TypeAdapterGenerator
+// **************************************************************************
+
+class CodeAdapter extends TypeAdapter<Code> {
+  @override
+  final int typeId = 0;
+
+  @override
+  Code read(BinaryReader reader) {
+    final numOfFields = reader.readByte();
+    final fields = <int, dynamic>{
+      for (int i = 0; i < numOfFields; i++) reader.readByte(): reader.read(),
+    };
+    return Code()
+      ..isValid = fields[0] as bool?
+      ..format = fields[1] as int?
+      ..text = fields[2] as String?;
+  }
+
+  @override
+  void write(BinaryWriter writer, Code obj) {
+    writer
+      ..writeByte(3)
+      ..writeByte(0)
+      ..write(obj.isValid)
+      ..writeByte(1)
+      ..write(obj.format)
+      ..writeByte(2)
+      ..write(obj.text);
+  }
+
+  @override
+  int get hashCode => typeId.hashCode;
+
+  @override
+  bool operator ==(Object other) =>
+      identical(this, other) ||
+      other is CodeAdapter &&
+          runtimeType == other.runtimeType &&
+          typeId == other.typeId;
+}

example/lib/models/encode.dart

@@ -0,0 +1,34 @@
+import 'dart:typed_data';
+
+import 'package:flutter_zxing/flutter_zxing.dart';
+import 'package:hive_flutter/hive_flutter.dart';
+
+part "encode.g.dart";
+
+@HiveType(typeId: 1)
+class Encode extends HiveObject {
+  @HiveField(0)
+  bool? isValid;
+
+  @HiveField(1)
+  int? format;
+
+  @HiveField(2)
+  String? text;
+
+  @HiveField(3)
+  Uint8List? data;
+
+  @HiveField(4)
+  int? length;
+
+  Encode();
+
+  Encode.fromEncodeResult(EncodeResult result) {
+    isValid = result.isValidBool;
+    format = result.format;
+    text = result.textString;
+    data = result.bytes as Uint8List?;
+    length = result.length;
+  }
+}

example/lib/models/encode.g.dart

@@ -0,0 +1,52 @@
+// GENERATED CODE - DO NOT MODIFY BY HAND
+
+part of 'encode.dart';
+
+// **************************************************************************
+// TypeAdapterGenerator
+// **************************************************************************
+
+class EncodeAdapter extends TypeAdapter<Encode> {
+  @override
+  final int typeId = 1;
+
+  @override
+  Encode read(BinaryReader reader) {
+    final numOfFields = reader.readByte();
+    final fields = <int, dynamic>{
+      for (int i = 0; i < numOfFields; i++) reader.readByte(): reader.read(),
+    };
+    return Encode()
+      ..isValid = fields[0] as bool?
+      ..format = fields[1] as int?
+      ..text = fields[2] as String?
+      ..data = fields[3] as Uint8List?
+      ..length = fields[4] as int?;
+  }
+
+  @override
+  void write(BinaryWriter writer, Encode obj) {
+    writer
+      ..writeByte(5)
+      ..writeByte(0)
+      ..write(obj.isValid)
+      ..writeByte(1)
+      ..write(obj.format)
+      ..writeByte(2)
+      ..write(obj.text)
+      ..writeByte(3)
+      ..write(obj.data)
+      ..writeByte(4)
+      ..write(obj.length);
+  }
+
+  @override
+  int get hashCode => typeId.hashCode;
+
+  @override
+  bool operator ==(Object other) =>
+      identical(this, other) ||
+      other is EncodeAdapter &&
+          runtimeType == other.runtimeType &&
+          typeId == other.typeId;
+}

example/lib/models/models.dart

@@ -0,0 +1,2 @@
+export 'code.dart';
+export 'encode.dart';

example/lib/pages/history_page.dart

@@ -1,6 +1,8 @@
 import 'package:flutter/material.dart';
 import 'package:flutter/services.dart';
-import 'package:flutter_zxing/flutter_zxing.dart';
+import 'package:flutter_zxing_example/models/code.dart';
+import 'package:flutter_zxing_example/utils/db_service.dart';
+import 'package:hive_flutter/hive_flutter.dart';
 
 class HistoryPage extends StatefulWidget {
   const HistoryPage({
@@ -12,8 +14,6 @@ class HistoryPage extends StatefulWidget {
 }
 
 class _HistoryPageState extends State<HistoryPage> {
-  final _resultQueue = <CodeResult>[];
-
   @override
   Widget build(BuildContext context) {
     return Scaffold(
@@ -25,42 +25,47 @@ class _HistoryPageState extends State<HistoryPage> {
   }
 
   _buildResultList() {
-    return _resultQueue.isEmpty
-        ? const Center(
-            child: Text(
-            'No Results',
-            style: TextStyle(fontSize: 24),
-          ))
-        : ListView.builder(
-            itemCount: _resultQueue.length,
-            itemBuilder: (context, index) {
-              final result = _resultQueue[index];
-              return ListTile(
-                title: Text(result.textString ?? ''),
-                subtitle: Text(result.formatString),
-                trailing: ButtonBar(
-                  mainAxisSize: MainAxisSize.min,
-                  children: [
-                    // Copy button
-                    TextButton(
-                      child: const Text('Copy'),
-                      onPressed: () {
-                        Clipboard.setData(
-                            ClipboardData(text: result.textString));
-                      },
-                    ),
-                    // Remove button
-                    IconButton(
-                      icon: const Icon(Icons.delete, color: Colors.red),
-                      onPressed: () {
-                        _resultQueue.removeAt(index);
-                        setState(() {});
-                      },
-                    ),
-                  ],
-                ),
-              );
-            },
-          );
+    return ValueListenableBuilder<Box<Code>>(
+        valueListenable: DbService.instance.getCodes().listenable(),
+        builder: (context, box, _) {
+          final results = box.values.toList().cast<Code>();
+          return results.isEmpty
+              ? const Center(
+                  child: Text(
+                  'No Results',
+                  style: TextStyle(fontSize: 24),
+                ))
+              : ListView.builder(
+                  itemCount: results.length,
+                  itemBuilder: (context, index) {
+                    final result = results[index];
+                    return ListTile(
+                      title: Text(result.text ?? ''),
+                      subtitle: Text(result.format.toString()),
+                      trailing: ButtonBar(
+                        mainAxisSize: MainAxisSize.min,
+                        children: [
+                          // Copy button
+                          TextButton(
+                            child: const Text('Copy'),
+                            onPressed: () {
+                              Clipboard.setData(
+                                  ClipboardData(text: result.text));
+                            },
+                          ),
+                          // Remove button
+                          IconButton(
+                            icon: const Icon(Icons.delete, color: Colors.red),
+                            onPressed: () {
+                              // DbService.instance.deleteCode(result);
+                              // setState(() {});
+                            },
+                          ),
+                        ],
+                      ),
+                    );
+                  },
+                );
+        });
   }
 }

example/lib/pages/home_page.dart

@@ -19,14 +19,14 @@ class _HomePageState extends State<HomePage> {
   final creatorPage = const CreatorPage();
   final historyPage = const HistoryPage();
   final scannerPage = const ScannerPage();
-  final notificationsPage = const ScannerPage();
+  final helpPage = Container();
   final settingsPage = const SettingsPage();
 
   dynamic pages() => [
         creatorPage,
         historyPage,
         scannerPage,
-        notificationsPage,
+        helpPage,
         settingsPage,
       ];
 
@@ -34,7 +34,7 @@ class _HomePageState extends State<HomePage> {
         const TabItem(icon: FontAwesomeIcons.barcode),
         const TabItem(icon: FontAwesomeIcons.clockRotateLeft),
         const TabItem(icon: Icons.qr_code_scanner),
-        const TabItem(icon: FontAwesomeIcons.solidBell),
+        const TabItem(icon: FontAwesomeIcons.circleQuestion),
         const TabItem(icon: FontAwesomeIcons.gear),
       ];
 

example/lib/pages/scanner_page.dart

@@ -2,6 +2,8 @@ import 'dart:typed_data';
 
 import 'package:flutter/material.dart';
 import 'package:flutter_zxing/flutter_zxing.dart';
+import 'package:flutter_zxing_example/models/models.dart';
+import 'package:flutter_zxing_example/utils/db_service.dart';
 import 'package:font_awesome_flutter/font_awesome_flutter.dart';
 import 'package:image_picker/image_picker.dart';
 import 'package:image/image.dart' as imglib;
@@ -26,9 +28,7 @@ class _ScannerPageState extends State<ScannerPage> {
       ),
       body: ZxingReaderWidget(
         onScan: (result) async {
-          // _resultQueue.insert(0, result);
-          // await Future.delayed(const Duration(milliseconds: 500));
-          // setState(() {});
+          addCode(result);
         },
       ),
       floatingActionButton: FloatingActionButton(
@@ -49,7 +49,7 @@ class _ScannerPageState extends State<ScannerPage> {
                 0,
               );
               if (result.isValidBool) {
-                debugPrint(result.textString);
+                addCode(result);
               }
             }
           }
@@ -57,4 +57,23 @@ class _ScannerPageState extends State<ScannerPage> {
       ),
     );
   }
+
+  void addCode(CodeResult result) {
+    Code code = Code.fromCodeResult(result);
+    DbService.instance.addCode(code);
+
+    // show snackbar
+    ScaffoldMessenger.of(context).hideCurrentSnackBar();
+    ScaffoldMessenger.of(context).showSnackBar(
+      SnackBar(
+        content: Padding(
+          padding: const EdgeInsets.only(bottom: 30.0),
+          child: Text(
+            code.text ?? '',
+            textAlign: TextAlign.center,
+          ),
+        ),
+      ),
+    );
+  }
 }

example/lib/utils/db_service.dart

@@ -0,0 +1,50 @@
+import 'package:flutter_zxing_example/models/models.dart';
+import 'package:hive_flutter/hive_flutter.dart';
+
+class DbService {
+  DbService._privateConstructor();
+
+  static final DbService instance = DbService._privateConstructor();
+
+  Future<void> initializeApp() async {
+    await Hive.initFlutter();
+    Hive.registerAdapter(CodeAdapter());
+
+    await Hive.openBox<Code>('codes');
+    await Hive.openBox<Encode>('encodes');
+
+    // Hive.box('codes').close();
+  }
+
+  Box<Code> getCodes() => Hive.box<Code>('codes');
+
+  Future deleteCodes() async {
+    var codes = getCodes();
+    await codes.deleteAll(codes.keys);
+    return;
+  }
+
+  Future addCode(Code value) async {
+    var codes = getCodes();
+    if (!codes.values.contains(value)) {
+      return codes.add(value);
+    }
+    return;
+  }
+
+  Box<Encode> getEncodes() => Hive.box<Encode>('encodes');
+
+  Future deleteEncodes() async {
+    var encodes = getEncodes();
+    await encodes.deleteAll(encodes.keys);
+    return;
+  }
+
+  Future addEncode(Encode value) async {
+    var encodes = getEncodes();
+    if (!encodes.values.contains(value)) {
+      return encodes.add(value);
+    }
+    return;
+  }
+}

example/pubspec.lock

@@ -378,6 +378,27 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "2.1.0"
+  hive:
+    dependency: "direct main"
+    description:
+      name: hive
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.1.0"
+  hive_flutter:
+    dependency: "direct main"
+    description:
+      name: hive_flutter
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.1.0"
+  hive_generator:
+    dependency: "direct dev"
+    description:
+      name: hive_generator
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.1.2"
   http:
     dependency: transitive
     description:
@@ -782,6 +803,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "1.2.2"
+  source_helper:
+    dependency: transitive
+    description:
+      name: source_helper
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "1.3.2"
   source_span:
     dependency: transitive
     description:

example/pubspec.yaml

@@ -18,6 +18,8 @@ dependencies:
   flutter_zxing:
     path: ../
   font_awesome_flutter: ^10.1.0
+  hive: ^2.1.0
+  hive_flutter: ^1.1.0
   image_picker: ^0.8.5
   nb_utils: ^4.5.0
   path_provider: ^2.0.9
@@ -32,6 +34,7 @@ dev_dependencies:
   flutter_lints: ^1.0.0
   flutter_test:
     sdk: flutter
+  hive_generator:
   mobx_codegen:
 
 flutter:

ios/Classes/src/native_zxing.cpp

@@ -99,7 +99,7 @@ extern "C"
     {
         long long start = get_now();
 
-        struct EncodeResult result = {nullptr, 0, false, nullptr};
+        struct EncodeResult result = {0, contents, Format(format), nullptr, 0, nullptr};
         try
         {
             auto writer = MultiFormatWriter(BarcodeFormat(format)).setMargin(margin).setEccLevel(eccLevel);

ios/Classes/src/native_zxing.h

@@ -37,9 +37,11 @@ extern "C"
 
     struct EncodeResult
     {
+        int isValid;
+        char *text;
+        enum Format format;
         const unsigned int *data;
         int length;
-        int isValid;
         char *error;
     };
 

lib/flutter_zxing.dart

@@ -75,20 +75,20 @@ extension Uint8ListBlobConversion on Uint8List {
   }
 }
 
-extension Encode on EncodeResult {
+extension CodeExt on CodeResult {
   bool get isValidBool => isValid == 1;
-  Uint32List get bytes => data.asTypedList(length);
-  String get errorMessage => error.cast<Utf8>().toDartString();
+  String? get textString =>
+      text == nullptr ? null : text.cast<Utf8>().toDartString();
+  String get formatString => CodeFormat.formatName(format);
 }
 
-extension Code on CodeResult {
+extension EncodeExt on EncodeResult {
   bool get isValidBool => isValid == 1;
   String? get textString =>
       text == nullptr ? null : text.cast<Utf8>().toDartString();
-
-  String get formatString {
-    return CodeFormat.formatName(format);
-  }
+  String get formatString => CodeFormat.formatName(format);
+  Uint32List get bytes => data.asTypedList(length);
+  String get errorMessage => error.cast<Utf8>().toDartString();
 }
 
 extension CodeFormat on Format {

lib/generated_bindings.dart

@@ -216,13 +216,18 @@ class CodeResult extends ffi.Struct {
 }
 
 class EncodeResult extends ffi.Struct {
-  external ffi.Pointer<ffi.Uint32> data;
+  @ffi.Int32()
+  external int isValid;
+
+  external ffi.Pointer<ffi.Int8> text;
 
   @ffi.Int32()
-  external int length;
+  external int format;
+
+  external ffi.Pointer<ffi.Uint32> data;
 
   @ffi.Int32()
-  external int isValid;
+  external int length;
 
   external ffi.Pointer<ffi.Int8> error;
 }