Implement SQLite helper

Author: gitanjal

lib/sqlite_helper.dart

@@ -0,0 +1,66 @@
+import 'package:sqflite/sqflite.dart';
+
+final String tableName='items';
+final String colId='id';
+final String colTitle='title';
+final String colStatus='status';
+
+class SqliteHelper {
+  late Database _database;
+
+  open() async {
+    _database = await openDatabase(
+      'local_db.db',
+      version: 1,
+      onCreate: (Database db,int version) async{
+        await db.execute('Create table $tableName ('
+            '$colId integer primary key autoincrement,'
+            '$colTitle text not null,'
+            '$colStatus integer not null'
+            ')');
+      }
+    );
+  }
+
+  Future<bool> insert(Map<String,dynamic> dataToInsert) async{
+    await open();
+    int rowId=await _database.insert(tableName, dataToInsert);
+    return rowId>0;
+  }
+
+  Future<List<Map>> fetchAll() async {
+    await open();
+    List<Map> items=await _database.query(tableName);
+    return items;
+  }
+
+  Future<List<Map>> fetchAllOrderedByID() async {
+    await open();
+    List<Map> items=await _database.query(tableName,orderBy: 'id desc');
+    return items;
+  }
+
+  Future<Map> fetchOne(int id) async {
+    await open();
+    List<Map> items=await _database.query(tableName,where: '$colId=?',whereArgs: [id]);
+    return items.first;
+  }
+
+  Future<bool> update(int id,Map<String,dynamic> dataToUpdate) async {
+    await open();
+    int rowsUpdated=await _database.update(tableName, dataToUpdate,where: '$colId=?',whereArgs: [id]);
+    return rowsUpdated>0;
+  }
+
+  Future<bool> delete(int id) async {
+    await open();
+    int rowsDeleted=await _database.delete(tableName,where: '$colId=?',whereArgs: [id]);
+    return rowsDeleted==1;
+  }
+
+  Future<bool> deleteAll()async{
+    await open();
+    int rowsDeleted=await _database.delete(tableName);
+    return rowsDeleted>0;
+  }
+}

pubspec.lock

@@ -121,6 +121,20 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "1.8.2"
+  sqflite:
+    dependency: "direct main"
+    description:
+      name: sqflite
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.0.3+1"
+  sqflite_common:
+    dependency: transitive
+    description:
+      name: sqflite_common
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "2.3.0"
   stack_trace:
     dependency: transitive
     description:
@@ -142,6 +156,13 @@ packages:
       url: "https://pub.dartlang.org"
     source: hosted
     version: "1.1.0"
+  synchronized:
+    dependency: transitive
+    description:
+      name: synchronized
+      url: "https://pub.dartlang.org"
+    source: hosted
+    version: "3.0.0+3"
   term_glyph:
     dependency: transitive
     description:
@@ -165,3 +186,4 @@ packages:
     version: "2.1.2"
 sdks:
   dart: ">=2.17.1 <3.0.0"
+  flutter: ">=3.0.0"

pubspec.yaml

@@ -34,6 +34,7 @@ dependencies:
   # The following adds the Cupertino Icons font to your application.
   # Use with the CupertinoIcons class for iOS style icons.
   cupertino_icons: ^1.0.2
+  sqflite: ^2.0.3+1
 
 dev_dependencies:
   flutter_test: