task

src/App.tsx

@@ -1,26 +1,225 @@
 /* eslint-disable max-len */
+/* eslint-disable jsx-a11y/label-has-associated-control */
 /* eslint-disable jsx-a11y/control-has-associated-label */
-import React from 'react';
+import React, { useState, useEffect } from 'react';
 import { UserWarning } from './UserWarning';
+import * as todoService from './api/todos';
+import { Todo } from './types/Todo';
+import { FilterStatus } from './types/FilterStatus';
+import { ErrorMessage } from './types/ErrorMessage';
 
-const USER_ID = 0;
+import { ErrorNotification } from './components/ErrorNotification';
+
+import { Header } from './components/Header';
+import { TodoList } from './components/TodoList';
+import { Footer } from './components/Footer';
 
 export const App: React.FC = () => {
-  if (!USER_ID) {
+  const [todos, setTodos] = useState<Todo[]>([]);
+  const [errorMessage, setErrorMessage] = useState<ErrorMessage | null>(null);
+  const [filter, setFilter] = useState<FilterStatus>(FilterStatus.All);
+  const [newTodoTitle, setNewTodoTitle] = useState('');
+  const [tempTodo, setTempTodo] = useState<Todo | null>(null);
+  const [isLoading, setIsLoading] = useState(false);
+  const [loadingIds, setLoadingIds] = useState<number[]>([]);
+
+  const todoFieldRef = React.useRef<HTMLInputElement>(null);
+
+  const activeTodosCount = todos.filter(todo => !todo.completed).length;
+
+  const showError = (message: ErrorMessage) => {
+    setErrorMessage(message);
+    setTimeout(() => setErrorMessage(null), 3000);
+  };
+
+  useEffect(() => {
+    const loadTodos = async () => {
+      setErrorMessage(null);
+
+      try {
+        const data = await todoService.getTodos();
+
+        setTodos(data);
+      } catch {
+        showError(ErrorMessage.Load);
+      }
+    };
+
+    loadTodos();
+    todoFieldRef.current?.focus();
+  }, []);
+
+  useEffect(() => {
+    if (!isLoading) {
+      todoFieldRef.current?.focus();
+    }
+  }, [isLoading, todos.length]);
+
+  const visibleTodos = todos.filter(todo => {
+    if (filter === FilterStatus.Active) {
+      return !todo.completed;
+    }
+
+    if (filter === FilterStatus.Completed) {
+      return todo.completed;
+    }
+
+    return true;
+  });
+
+  if (!todoService.USER_ID) {
     return <UserWarning />;
   }
 
+  const handleFormSubmit = async (event: React.FormEvent) => {
+    event.preventDefault();
+
+    setErrorMessage(null);
+
+    const trimmedTodoTitle = newTodoTitle.trim();
+
+    if (!trimmedTodoTitle) {
+      showError(ErrorMessage.Title);
+
+      return;
+    }
+
+    setIsLoading(true);
+
+    const newTempTodo = {
+      id: 0,
+      userId: todoService.USER_ID,
+      title: trimmedTodoTitle,
+      completed: false,
+    };
+
+    setTempTodo(newTempTodo);
+
+    try {
+      const newTodo = await todoService.createTodo(trimmedTodoTitle);
+
+      setTodos(prev => [...prev, newTodo]);
+      setNewTodoTitle('');
+    } catch {
+      showError(ErrorMessage.Add);
+    } finally {
+      setIsLoading(false);
+      setTempTodo(null);
+    }
+  };
+
+  const onDeleteTodo = async (todoId: number) => {
+    setErrorMessage(null);
+
+    setLoadingIds(prev => [...prev, todoId]);
+
+    try {
+      await todoService.deleteTodo(todoId);
+      setTodos(prev => prev.filter(todo => todo.id !== todoId));
+    } catch {
+      showError(ErrorMessage.Delete);
+    } finally {
+      setLoadingIds(prev => prev.filter(id => id !== todoId));
+    }
+  };
+
+  const onToggleTodo = async (todo: Todo) => {
+    setErrorMessage(null);
+    setLoadingIds(prev => [...prev, todo.id]);
+
+    try {
+      const updatedTodo = await todoService.updateTodo(todo.id, {
+        completed: !todo.completed,
+      });
+
+      setTodos(prev => prev.map(t => (t.id === todo.id ? updatedTodo : t)));
+    } catch {
+      showError(ErrorMessage.Update);
+    } finally {
+      setLoadingIds(prev => prev.filter(id => id !== todo.id));
+    }
+  };
+
+  const onUpdateTodo = async (todoToUpdate: Todo, newTitle: string) => {
+    setErrorMessage(null);
+    setLoadingIds(prev => [...prev, todoToUpdate.id]);
+
+    try {
+      const updatedTodo = await todoService.updateTodo(todoToUpdate.id, {
+        title: newTitle,
+      });
+
+      setTodos(prev =>
+        prev.map(t => (t.id === todoToUpdate.id ? updatedTodo : t)),
+      );
+    } catch (error) {
+      showError(ErrorMessage.Update);
+      throw error;
+    } finally {
+      setLoadingIds(prev => prev.filter(id => id !== todoToUpdate.id));
+    }
+  };
+
+  const clearCompleted = () => {
+    const completedTodos = todos.filter(t => t.completed);
+
+    completedTodos.forEach(todo => {
+      onDeleteTodo(todo.id);
+    });
+  };
+
+  const onToggleAll = () => {
+    const areAllCompleted = todos.every(todo => todo.completed);
+    const todosToUpdate = todos.filter(
+      todo => todo.completed === areAllCompleted,
+    );
+
+    todosToUpdate.forEach(todo => onToggleTodo(todo));
+  };
+
   return (
-    <section className="section container">
-      <p className="title is-4">
-        Copy all you need from the prev task:
-        <br />
-        <a href="https://github.com/mate-academy/react_todo-app-add-and-delete#react-todo-app-add-and-delete">
-          React Todo App - Add and Delete
-        </a>
-      </p>
-
-      <p className="subtitle">Styles are already copied</p>
-    </section>
+    <div className="todoapp">
+      <h1 className="todoapp__title">todos</h1>
+
+      <div className="todoapp__content">
+        <Header
+          ref={todoFieldRef}
+          title={newTodoTitle}
+          onTitleChange={setNewTodoTitle}
+          onSubmit={handleFormSubmit}
+          isToggleAllActive={
+            todos.length > 0 && todos.every(todo => todo.completed)
+          }
+          isLoading={isLoading}
+          onToggleAll={onToggleAll}
+          hasTodos={!!todos.length}
+        />
+
+        {(!!todos.length || tempTodo) && (
+          <>
+            <TodoList
+              todos={visibleTodos}
+              loadingIds={loadingIds}
+              tempTodo={tempTodo}
+              onDeleteTodo={onDeleteTodo}
+              onToggleTodo={onToggleTodo}
+              onUpdateTodo={onUpdateTodo}
+            />
+            <Footer
+              activeTodosCount={activeTodosCount}
+              filter={filter}
+              setFilter={setFilter}
+              hasCompleted={todos.some(todo => todo.completed)}
+              onClearCompleted={clearCompleted}
+            />
+          </>
+        )}
+      </div>
+
+      <ErrorNotification
+        message={errorMessage}
+        onClose={() => setErrorMessage(null)}
+      />
+    </div>
   );
 };

src/api/todos.ts

@@ -0,0 +1,24 @@
+import { Todo } from '../types/Todo';
+import { client } from '../utils/fetchClient';
+
+export const USER_ID = 4002;
+
+export const getTodos = () => {
+  return client.get<Todo[]>(`/todos?userId=${USER_ID}`);
+};
+
+export const createTodo = (title: string) => {
+  return client.post<Todo>('/todos', {
+    title,
+    userId: USER_ID,
+    completed: false,
+  });
+};
+
+export const deleteTodo = (todoId: number) => {
+  return client.delete(`/todos/${todoId}`);
+};
+
+export const updateTodo = (todoId: number, data: Partial<Todo>) => {
+  return client.patch<Todo>(`/todos/${todoId}`, data);
+};

src/components/ErrorNotification.tsx

@@ -0,0 +1,27 @@
+import React from 'react';
+import cn from 'classnames';
+import { ErrorMessage } from '../types/ErrorMessage';
+
+type Props = {
+  message: ErrorMessage | null;
+  onClose: () => void;
+};
+
+export const ErrorNotification: React.FC<Props> = ({ message, onClose }) => {
+  return (
+    <div
+      data-cy="ErrorNotification"
+      className={cn('notification is-danger is-light has-text-weight-normal', {
+        hidden: !message,
+      })}
+    >
+      <button
+        data-cy="HideErrorButton"
+        type="button"
+        className="delete"
+        onClick={onClose}
+      />
+      {message}
+    </div>
+  );
+};

src/components/Footer.tsx

@@ -0,0 +1,71 @@
+import React from 'react';
+import cn from 'classnames';
+import { FilterStatus } from '../types/FilterStatus';
+
+type Props = {
+  activeTodosCount: number;
+  filter: FilterStatus;
+  setFilter: (status: FilterStatus) => void;
+  hasCompleted: boolean;
+  onClearCompleted: () => void;
+};
+
+const filterLinks = [
+  { status: FilterStatus.All, label: 'All', href: '#/', cy: 'FilterLinkAll' },
+
+  {
+    status: FilterStatus.Active,
+    label: 'Active',
+    href: '#/active',
+    cy: 'FilterLinkActive',
+  },
+  {
+    status: FilterStatus.Completed,
+    label: 'Completed',
+    href: '#/completed',
+    cy: 'FilterLinkCompleted',
+  },
+];
+
+export const Footer: React.FC<Props> = ({
+  activeTodosCount,
+  filter,
+  setFilter,
+  hasCompleted,
+  onClearCompleted,
+}) => {
+  return (
+    <footer className="todoapp__footer" data-cy="Footer">
+      <span className="todo-count" data-cy="TodosCounter">
+        {activeTodosCount} items left
+      </span>
+
+      {/* Active link should have the 'selected' class */}
+      <nav className="filter" data-cy="Filter">
+        {filterLinks.map(({ status, label, href, cy }) => (
+          <a
+            key={status}
+            href={href}
+            className={cn('filter__link', {
+              selected: filter === status,
+            })}
+            onClick={() => setFilter(status)}
+            data-cy={cy}
+          >
+            {label}
+          </a>
+        ))}
+      </nav>
+
+      <button
+        type="button"
+        className="todoapp__clear-completed"
+        data-cy="ClearCompletedButton"
+        onClick={onClearCompleted}
+        disabled={!hasCompleted}
+      >
+        Clear completed
+      </button>
+    </footer>
+  );
+};