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Java
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package ru.kamask.pet;
import java.util.Scanner;
public class TodoApp {
private static TaskManager taskManager;
private static Task[] tasks = new Task[10];
private static int tasksCounter = 0;
private static Scanner scanner = new Scanner(System.in);
public static void main(String[] args) {
TodoApp app = new TodoApp();
taskManager = app.new TaskManager();
app.run();
}
private void run() {
while (true) {
Task.printTotalTasksCreated();
String menu = """
┌──────────────────────────┐
| [1] Добавить дело |
| [2] Список дел |
| |
| [0] Выйти из программы |
└──────────────────────────┘
Введите номер пункта меню:""";
switch (requestIntFromInput(menu, new int[] { 0, 1, 2 })) {
case 1 -> displayCreateTask();
case 2 -> displayTasks();
case 0 -> {
scanner.close();
System.exit(0);
}
}
}
}
private static void displayCreateTask() {
if (Task.taskCount >= 9) {
System.out.println("\nОшибка: Достигнут лимит в 10 дел.\n");
return;
}
String title;
String description;
do {
System.out.print("\nНапишите название дела (320 символов): ");
title = scanner.nextLine().trim();
if (title.length() >= 3 && title.length() <= 20)
break;
System.out.print("\nОшибка: Название должно содержать от 3 до 20 символов.\опробуйте снова: ");
} while (true);
System.out.print("\nНaпишите описание дела: ");
description = scanner.nextLine().trim();
taskManager.addTask(new Task(title, description));
}
private static void displayTask(Task task) {
Task.TaskPrinter.print(task);
String firstOption = switch (task.getStatus()) {
case NEW, CANCELLED -> "Начать";
case IN_PROGRESS -> "Выполнено";
case COMPLETED -> "Доделать";
};
int input = requestIntFromInput("[1]" + firstOption + " [2]Отменить [0]Главное меню\n\nВвод:",
new int[] { 0, 1, 2 });
switch (input) {
case 0:
return;
case 1: {
switch (task.getStatus()) {
case NEW, CANCELLED, COMPLETED -> taskManager.markInProgress(task.getId());
case IN_PROGRESS -> taskManager.markCompleted(task.getId());
}
break;
}
case 2:
taskManager.markCanceled(task.getId());
}
displayTask(task);
}
private static void displayTasks() {
if (tasksCounter == 0) {
int input = requestIntFromInput("""
Список дел пуст.
[1] Добавить дело
[0] Выйти из программы
Введите номер пункта:""", new int[] { 0, 1 });
if (input == 1) {
displayCreateTask();
} else
System.exit(0);
}
System.out.println("""
Список дел:
""");
taskManager.printTasks();
int[] variantsInput = new int[tasksCounter + 1];
for (int i = 0; i < tasksCounter; i++)
variantsInput[i] = tasks[i].getId();
variantsInput[tasksCounter] = 0;
int input = requestIntFromInput("""
Введите номер дела или 0 для возврата в меню:""", variantsInput);
if (input == 0)
return;
displayTask(getTaskById(input));
}
private static Task getTaskById(int id) {
for (int i = 0; i < Task.taskCount; i++) {
if (tasks[i].getId() == id)
return tasks[i];
}
return null;
}
private static int requestIntFromInput(String template, int[] allowedInts) {
do {
System.out.print(template);
int input;
do {
if (scanner.hasNextInt()) {
input = scanner.nextInt();
scanner.nextLine();
break;
} else {
scanner.next();
System.out.print("Ошибка: используйте цифры.\овторите ввод:");
}
} while (true);
for (int i : allowedInts)
if (i == input)
return input;
System.out.print("Ошибка: укажите номер выбранного пункта.\овторите ввод:");
} while (true);
}
interface TaskAction {
default void execute(Task task) {
};
default void start(Task task) {
};
default void cancel(Task task) {
};
}
private class TaskManager {
void addTask(Task task) {
tasks[tasksCounter++] = task;
}
boolean markCompleted(int id) {
for (int i = 0; i < tasksCounter; i++)
if (tasks[i].getId() == id) {
TaskAction action = new TaskAction() {
@Override
public void execute(Task task) {
task.markCompleted();
}
};
action.execute(tasks[i]);
return true;
}
return false;
}
boolean markInProgress(int id) {
for (int i = 0; i < tasksCounter; i++)
if (tasks[i].getId() == id) {
TaskAction action = new TaskAction() {
@Override
public void start(Task task) {
task.markInProgress();
}
};
action.start(tasks[i]);
return true;
}
return false;
}
boolean markCanceled(int id) {
for (int i = 0; i < tasksCounter; i++)
if (tasks[i].getId() == id) {
TaskAction action = new TaskAction() {
@Override
public void cancel(Task task) {
task.markCanceled();
}
};
action.cancel(tasks[i]);
return true;
}
return false;
}
void printTasks() {
class ShortTaskPrinter {
void print(Task task) {
int id = task.getId();
String title = task.getTitle();
TaskStatus status = task.getStatus();
String stringCompleted = status.getColorCode() + status.getDescription() + "\u001B[0m";
System.out.printf("%-3d | %-20s | %s\n", id, title, stringCompleted);
}
}
ShortTaskPrinter printer = new ShortTaskPrinter();
for (int i = 0; i < Task.taskCount; i++)
printer.print(tasks[i]);
}
}
}