Todolist App

this is an application that runs in the console terminal

how to run app

• download and install JDK 17
• setup environment and check java version installation on terminal

  • java --version

• download this repository or download todolist-app.jar in the repository
• open terminal and go to file todolist-app.jar run the program

  • C:\Users\YourComputer\Downloads\todolist> java -jar todolist-app.jar
    

Prototype Todolist App

Explanation

this project uses the Apache Maven build automation tool.

this project has several modules.

• todolist-app
  • this is main program

  public class App {
    public static void main(String[] args) {
  
      TodoListRepository repository = new TodoListRepositoryImpl();
      TodoListService service = new TodoListServiceImpl(repository);
  
      TodoListView view = new TodoListView(repository, service);
  
      view.root();
    }
  }
  

• todolist-entity
  • this is class representation data

  public class TodoList {
    private final String todo;
    private final LocalDateTime dateTime;
  
    public TodoList(String todo, LocalDateTime dateTime) {
        this.todo = todo;
        this.dateTime = dateTime;
    }
  
    public String getTodo() {
        return this.todo;
    }
  
    public String getDateTime() {
        var formatted = DateTimeFormatter.ofPattern("MMMM/dd/yyyy HH:mm");
        return dateTime.format(formatted);
    }
  }

• todolist-repository
  • this is logic data

  public interface TodoListRepository {
  
    public TodoList[] getAll();
  
    public void addTodo(TodoList todo, Integer position);
  
    public Boolean deleteTodo(Integer position);
  
    public Boolean updateTodo(Integer position, TodoList newTodo);
  }
  

• todolist-service
  • this is business data

  public interface TodoListService {
  
    public void displayTodolist();
    public void addTodo(TodoList todo, Integer position);
  
    public void deleteTodo(Integer position);
  
    public void updateTodo(Integer position, TodoList newTodo);
  
  }
  

• todolist-utils
  • this is input scanner

  public class TextInput {
    private static Scanner scanner = new Scanner(System.in);
    public static String textInput() {
        return scanner.nextLine();
    }
  }

• todolist-view
  • this view

  public class TodoListView {
  
    private TodoListRepository repository;
    private TodoListService service;
  
    public TodoListView(TodoListRepository repository, TodoListService service) {
        this.repository = repository;
        this.service = service;
    }
  
    public void root() {
        while (true) {
            System.out.println("\n\n-----------------+ TODO LIST +-----------------");
            service.displayTodolist();
            System.out.println("-----------------------------------------------");
            System.out.println("-------------+ Menu +--------------");
            System.out.print("[1]. Add TodoList\n" +
                    "[2]. Delete TodoList\n" +
                    "[3]. Update TodoList\n" +
                    "[x]. Exit\n");
            System.out.println("-----------------------------------");
            System.out.print("pick one : ");
            var selected = TextInput.textInput();
  
            switch (selected) {
                case "1" -> {
                    addTodo();
                }
                case "2" -> {
                    deleteTodo();
                }
                case "3" -> {
                    updateTodo();
                }
                case "x" -> {
                    System.exit(1);
                }
                default -> {
                    System.err.println("chooice 1 or 0");
                }
            }
        }
    }
  
    public void addTodo() {
        var position = 0;
        System.out.print("enter todo: ");
        String textInput = TextInput.textInput();
  
        TodoList todo = new TodoList(textInput, LocalDateTime.now());
        service.addTodo(todo, position++);
    }
  
    public void deleteTodo() {
        System.out.print("enter number position : ");
        String position = TextInput.textInput();
  
        service.deleteTodo(Integer.valueOf(position));
    }
  
    public void updateTodo() {
        System.out.print("enter number for update : ");
        String position = TextInput.textInput();
        System.out.print("enter new todo : ");
        String todo = TextInput.textInput();
  
        TodoList newTodo = new TodoList(todo, LocalDateTime.now());
        service.updateTodo(Integer.valueOf(position), newTodo);
    }
  }