Dart Creational Design Patterns Added

.gitignore

@@ -141,3 +141,9 @@ cython_debug/
 
 #OS
 .DS_Store
+
+#Dart
+.dart_tool/
+analysis_options.yaml
+pubspec.lock
+pubspec.yaml

README.md

@@ -983,8 +983,8 @@ class Lesson
 {
     public int id;
     public string name;
-    public string price;
-    public string discountedPrice;
+    public double price;
+    public double discountedPrice;
     public bool discountApplied;
     public string lessonNote;
 }

abstract-factory/dart/command.dart

@@ -0,0 +1,3 @@
+abstract class Command {
+  void executeCommand(String query);
+}

abstract-factory/dart/connection.dart

@@ -0,0 +1,4 @@
+abstract class Connection {
+  bool openConnection();
+  bool closeConnection();
+}

abstract-factory/dart/custom_operation.dart

@@ -0,0 +1,21 @@
+import 'command.dart';
+import 'connection.dart';
+import 'i_database_factory.dart';
+
+final class CustomOperation {
+  late final IDatabaseFactory _databaseFactory;
+  late final Connection _connection;
+  late final Command _command;
+
+  CustomOperation(IDatabaseFactory databaseFactory) {
+    _databaseFactory = databaseFactory;
+    _command = _databaseFactory.createCommand();
+    _connection = _databaseFactory.createConnection();
+  }
+
+  void removeById(int id) {
+    _connection.openConnection();
+    _command.executeCommand('DELETE ...');
+    _connection.closeConnection();
+  }
+}

abstract-factory/dart/i_database_factory.dart

@@ -0,0 +1,7 @@
+import 'command.dart';
+import 'connection.dart';
+
+abstract class IDatabaseFactory {
+  Connection createConnection();
+  Command createCommand();
+}

abstract-factory/dart/main.dart

@@ -0,0 +1,7 @@
+import 'custom_operation.dart';
+import 'oracle_database_factory.dart';
+
+void main() {
+  final CustomOperation customOperation = CustomOperation(const OracleDatabaseFactory());
+  customOperation.removeById(1);
+}

abstract-factory/dart/mysql_command.dart

@@ -0,0 +1,10 @@
+import 'command.dart';
+
+final class MysqlCommand implements Command {
+  const MysqlCommand();
+
+  @override
+  void executeCommand(String query) {
+    print('MysqlCommand: $query');
+  }
+}

abstract-factory/dart/mysql_connection.dart

@@ -0,0 +1,15 @@
+import 'connection.dart';
+
+final class MysqlConnection implements Connection {
+  const MysqlConnection();
+
+  @override
+  bool openConnection() {
+    return true;
+  }
+
+  @override
+  bool closeConnection() {
+    return true;
+  }
+}

abstract-factory/dart/mysql_database_factory.dart

@@ -0,0 +1,19 @@
+import 'command.dart';
+import 'connection.dart';
+import 'i_database_factory.dart';
+import 'mysql_command.dart';
+import 'mysql_connection.dart';
+
+final class MysqlDatabaseFactory implements IDatabaseFactory {
+  const MysqlDatabaseFactory();
+
+  @override
+  Command createCommand() {
+    return const MysqlCommand();
+  }
+
+  @override
+  Connection createConnection() {
+    return const MysqlConnection();
+  }
+}

abstract-factory/dart/oracle_command.dart

@@ -0,0 +1,10 @@
+import 'command.dart';
+
+final class OracleCommand implements Command {
+  const OracleCommand();
+
+  @override
+  void executeCommand(String query) {
+    print('OracleCommand: $query');
+  }
+}

abstract-factory/dart/oracle_connection.dart

@@ -0,0 +1,15 @@
+import 'connection.dart';
+
+final class OracleConnection implements Connection {
+  const OracleConnection();
+
+  @override
+  bool openConnection() {
+    return true;
+  }
+
+  @override
+  bool closeConnection() {
+    return true;
+  }
+}

abstract-factory/dart/oracle_database_factory.dart

@@ -0,0 +1,19 @@
+import 'command.dart';
+import 'connection.dart';
+import 'i_database_factory.dart';
+import 'oracle_command.dart';
+import 'oracle_connection.dart';
+
+final class OracleDatabaseFactory implements IDatabaseFactory {
+  const OracleDatabaseFactory();
+
+  @override
+  Command createCommand() {
+    return const OracleCommand();
+  }
+
+  @override
+  Connection createConnection() {
+    return const OracleConnection();
+  }
+}

builder/dart/lesson.dart

@@ -0,0 +1,17 @@
+final class Lesson {
+  int? id;
+  String? name;
+  double? price;
+  double? discountedPrice;
+  bool? discountApplied;
+  String? lessonNote;
+
+  Lesson({
+    this.id,
+    this.name,
+    this.price,
+    this.discountedPrice,
+    this.discountApplied,
+    this.lessonNote,
+  });
+}

builder/dart/lesson_builder.dart

@@ -0,0 +1,9 @@
+import 'lesson.dart';
+
+abstract class LessonBuilder {
+  Lesson get lesson;
+  void getLesson();
+  void applyDiscount();
+  void addLessonNote();
+  Lesson getResult();
+}

builder/dart/lesson_director.dart

@@ -0,0 +1,15 @@
+import 'lesson_builder.dart';
+
+final class LessonDirector {
+  late final LessonBuilder _builder;
+
+  LessonDirector(LessonBuilder builder) {
+    _builder = builder;
+  }
+
+  void make() {
+    _builder.getLesson();
+    _builder.applyDiscount();
+    _builder.addLessonNote();
+  }
+}

builder/dart/main.dart

@@ -0,0 +1,15 @@
+import 'lesson.dart';
+import 'lesson_builder.dart';
+import 'lesson_director.dart';
+import 'new_student_lesson_builder.dart';
+
+void main() {
+  final LessonBuilder lessonBuilder = NewStudentLessonBuilder();
+
+  final LessonDirector lessonDirector = LessonDirector(lessonBuilder);
+  lessonDirector.make();
+
+  final Lesson lesson = lessonBuilder.getResult();
+
+  print('${lesson.name} - ${lesson.price} - ${lesson.discountedPrice}');
+}

builder/dart/new_student_lesson_builder.dart

@@ -0,0 +1,31 @@
+import 'lesson.dart';
+import 'lesson_builder.dart';
+
+final class NewStudentLessonBuilder implements LessonBuilder {
+  @override
+  late Lesson lesson;
+
+  @override
+  void getLesson() {
+    lesson = Lesson();
+    lesson.id = 1;
+    lesson.name = 'Artificial Intelligence -  Beginner to Advanced in 10 Minute.';
+    lesson.price = 49.99;
+  }
+
+  @override
+  void applyDiscount() {
+    lesson.discountedPrice = lesson.price! * 0.5;
+    lesson.discountApplied = true;
+  }
+
+  @override
+  void addLessonNote() {
+    lesson.lessonNote = 'Hey, welcome. Your discount code has been applied!';
+  }
+
+  @override
+  Lesson getResult() {
+    return lesson;
+  }
+}

builder/dart/old_student_lesson_builder.dart

@@ -0,0 +1,31 @@
+import 'lesson.dart';
+import 'lesson_builder.dart';
+
+final class OldStudentLessonBuilder implements LessonBuilder {
+  @override
+  late Lesson lesson;
+
+  @override
+  void getLesson() {
+    lesson = Lesson();
+    lesson.id = 1;
+    lesson.name = 'Artificial Intelligence -  Beginner to Advanced in 10 Minute.';
+    lesson.price = 49.99;
+  }
+
+  @override
+  void applyDiscount() {
+    lesson.discountedPrice = lesson.price;
+    lesson.discountApplied = false;
+  }
+
+  @override
+  void addLessonNote() {
+    lesson.lessonNote = '';
+  }
+
+  @override
+  Lesson getResult() {
+    return lesson;
+  }
+}

factory/dart/i_notify.dart

@@ -0,0 +1,20 @@
+import 'mail_notify.dart';
+import 'sms_notify.dart';
+import 'user.dart';
+
+abstract class INotify {
+  void sendNotification(User user);
+
+  // Alternatif
+  //? Ayrıca bakınız: https://dart.dev/language/constructors#factory-constructors
+  factory INotify.createNotify(String type) {
+    switch (type) {
+      case 'MAIL':
+        return const MailNotify();
+      case 'SMS':
+        return const SmsNotify();
+      default:
+        throw Exception('Geçersiz bildirim türü.');
+    }
+  }
+}

factory/dart/mail_notify.dart

@@ -0,0 +1,9 @@
+import 'i_notify.dart';
+import 'user.dart';
+
+final class MailNotify implements INotify {
+  const MailNotify();
+
+  @override
+  void sendNotification(User user) {}
+}

factory/dart/main.dart

@@ -0,0 +1,14 @@
+import 'i_notify.dart';
+import 'notify_factory.dart';
+import 'user.dart';
+
+void main() {
+  const NotifyFactory notifyFactory = NotifyFactory();
+
+  final INotify? notify = notifyFactory.createNotify('MAIL');
+  notify?.sendNotification(const User());
+
+  // Alternatif
+  final INotify notify2 = INotify.createNotify('SMS');
+  notify2.sendNotification(const User());
+}

factory/dart/notify_factory.dart

@@ -0,0 +1,16 @@
+import 'i_notify.dart';
+import 'mail_notify.dart';
+import 'sms_notify.dart';
+
+final class NotifyFactory {
+  const NotifyFactory();
+
+  INotify? createNotify(String notifyType) {
+    if (notifyType == 'SMS') {
+      return const SmsNotify();
+    } else if (notifyType == 'MAIL') {
+      return const MailNotify();
+    }
+    return null;
+  }
+}

factory/dart/sms_notify.dart

@@ -0,0 +1,9 @@
+import 'i_notify.dart';
+import 'user.dart';
+
+final class SmsNotify implements INotify {
+  const SmsNotify();
+
+  @override
+  void sendNotification(User user) {}
+}

factory/dart/user.dart

@@ -0,0 +1,3 @@
+final class User {
+  const User();
+}

prototype/dart/employee.dart

@@ -0,0 +1,13 @@
+import 'i_cloneable_prototype.dart';
+
+class Employee implements ICloneablePrototype<Employee> {
+  final String firstName;
+  final String lastName;
+
+  const Employee(this.firstName, this.lastName);
+
+  @override
+  Employee clone() {
+    return Employee(firstName, lastName);
+  }
+}

prototype/dart/i_cloneable_prototype.dart

@@ -0,0 +1,3 @@
+abstract class ICloneablePrototype<TPrototype> {
+  TPrototype clone();
+}

prototype/dart/main.dart

@@ -0,0 +1,7 @@
+import 'employee.dart';
+
+void main() {
+  const Employee gulizar = Employee('Gülizar', 'Yılmaz');
+  final Employee cloneGulizar = gulizar.clone();
+  print(gulizar == cloneGulizar);
+}

singleton/dart/database.dart

@@ -0,0 +1,5 @@
+final class Database {
+  const Database._privateConstructor();
+
+  static const Database instance = Database._privateConstructor();
+}