Implement todo app with toggle, rename and API integration

package.json

@@ -15,7 +15,7 @@
   },
   "devDependencies": {
     "@cypress/react18": "^2.0.1",
-    "@mate-academy/scripts": "^1.8.5",
+    "@mate-academy/scripts": "^2.1.3",
     "@mate-academy/students-ts-config": "*",
     "@mate-academy/stylelint-config": "*",
     "@types/node": "^20.14.10",

src/App.tsx

@@ -1,26 +1,295 @@
-/* eslint-disable max-len */
-/* eslint-disable jsx-a11y/control-has-associated-label */
-import React from 'react';
+import React, { useState, useEffect, useRef } from 'react';
+import { flushSync } from 'react-dom';
 import { UserWarning } from './UserWarning';
+import { ErrorNotification } from './components/ErrorNotification';
+import { Header } from './components/Header';
+import { TodoList } from './components/TodoList';
+import { Footer } from './components/Footer';
+import { getTodos, createTodo, deleteTodo, updateTodo } from './api/todos';
+import { Todo } from './types/Todo';
 
-const USER_ID = 0;
+type FilterType = 'all' | 'active' | 'completed';
 
-export const App: React.FC = () => {
-  if (!USER_ID) {
-    return <UserWarning />;
+function getUserId(): number {
+  try {
+    const userData = localStorage.getItem('user');
+
+    return userData ? JSON.parse(userData).id || 0 : 0;
+  } catch {
+    return 0;
   }
+}
+
+function getFilteredTodos(todos: Todo[], filter: FilterType): Todo[] {
+  switch (filter) {
+    case 'active':
+      return todos.filter(todo => !todo.completed);
+    case 'completed':
+      return todos.filter(todo => todo.completed);
+    default:
+      return todos;
+  }
+}
+
+const TodoApp: React.FC<{ userId: number }> = ({ userId }) => {
+  const [todos, setTodos] = useState<Todo[]>([]);
+  const [errorMessage, setErrorMessage] = useState('');
+  const [filter, setFilter] = useState<FilterType>('all');
+  const [loadingIds, setLoadingIds] = useState<number[]>([]);
+  const [tempTodo, setTempTodo] = useState<Todo | null>(null);
+  const [newTodoTitle, setNewTodoTitle] = useState('');
+  const [isInputDisabled, setIsInputDisabled] = useState(false);
+
+  const inputRef = useRef<HTMLInputElement>(null);
+  const errorTimerRef = useRef<ReturnType<typeof setTimeout> | null>(null);
+
+  const showError = (message: string) => {
+    setErrorMessage(message);
+
+    if (errorTimerRef.current) {
+      clearTimeout(errorTimerRef.current);
+    }
+
+    errorTimerRef.current = setTimeout(() => {
+      setErrorMessage('');
+    }, 3000);
+  };
+
+  const hideError = () => {
+    setErrorMessage('');
+
+    if (errorTimerRef.current) {
+      clearTimeout(errorTimerRef.current);
+      errorTimerRef.current = null;
+    }
+  };
+
+  useEffect(() => {
+    inputRef.current?.focus();
+  }, []);
+
+  useEffect(() => {
+    getTodos(userId)
+      .then(setTodos)
+      .catch(() => showError('Unable to load todos'));
+  }, [userId]);
+
+  const addLoadingId = (id: number) => setLoadingIds(prev => [...prev, id]);
+
+  const removeLoadingId = (id: number) =>
+    setLoadingIds(prev => prev.filter(existingId => existingId !== id));
+
+  const handleSubmit = async (e: React.FormEvent) => {
+    e.preventDefault();
+    hideError();
+
+    const trimmed = newTodoTitle.trim();
+
+    if (!trimmed) {
+      showError('Title should not be empty');
+      inputRef.current?.focus();
+
+      return;
+    }
+
+    const temp: Todo = {
+      id: 0,
+      userId,
+      title: trimmed,
+      completed: false,
+    };
+
+    flushSync(() => {
+      setIsInputDisabled(true);
+      setTempTodo(temp);
+    });
+
+    let createdTodo: Todo | null = null;
+
+    try {
+      createdTodo = await createTodo(userId, trimmed);
+    } catch {
+      showError('Unable to add a todo');
+    } finally {
+      setTimeout(() => {
+        flushSync(() => {
+          setTempTodo(null);
+          setIsInputDisabled(false);
+          if (createdTodo) {
+            setTodos(prev => [...prev, createdTodo!]);
+            setNewTodoTitle('');
+          }
+        });
+        inputRef.current?.focus();
+      }, 0);
+    }
+  };
+
+  const handleDeleteTodo = async (id: number): Promise<void> => {
+    flushSync(() => addLoadingId(id));
+
+    let success = false;
+
+    try {
+      await deleteTodo(id);
+      success = true;
+    } catch {
+      showError('Unable to delete a todo');
+    } finally {
+      setTimeout(() => {
+        flushSync(() => {
+          removeLoadingId(id);
+          if (success) {
+            setTodos(prev => prev.filter(todo => todo.id !== id));
+          }
+        });
+        if (success) {
+          inputRef.current?.focus();
+        }
+      }, 0);
+    }
+
+    if (!success) {
+      throw new Error('Unable to delete a todo');
+    }
+  };
+
+  const handleUpdateTodo = async (
+    id: number,
+    data: Partial<Todo>,
+  ): Promise<void> => {
+    flushSync(() => addLoadingId(id));
+
+    let updated: Todo | null = null;
+
+    try {
+      updated = await updateTodo(id, data);
+    } catch {
+      showError('Unable to update a todo');
+    } finally {
+      setTimeout(() => {
+        flushSync(() => {
+          removeLoadingId(id);
+          if (updated) {
+            setTodos(prev => prev.map(todo => (todo.id === id ? updated! : todo)));
+          }
+        });
+      }, 0);
+    }
+
+    if (!updated) {
+      throw new Error('Unable to update a todo');
+    }
+  };
+
+  const handleToggleAll = async () => {
+    const allCompleted = todos.every(todo => todo.completed);
+    const newStatus = !allCompleted;
+    const todosToUpdate = todos.filter(todo => todo.completed !== newStatus);
+    const ids = todosToUpdate.map(todo => todo.id);
+
+    setLoadingIds(prev => [...prev, ...ids]);
+
+    let hasError = false;
+
+    await Promise.all(
+      todosToUpdate.map(todo =>
+        updateTodo(todo.id, { completed: newStatus })
+          .then(updated => {
+            setTodos(prev =>
+              prev.map(t => (t.id === updated.id ? updated : t)),
+            );
+          })
+          .catch(() => {
+            hasError = true;
+          }),
+      ),
+    );
+
+    if (hasError) {
+      showError('Unable to update a todo');
+    }
+
+    setLoadingIds(prev => prev.filter(id => !ids.includes(id)));
+  };
+
+  const handleClearCompleted = async () => {
+    const completedTodos = todos.filter(todo => todo.completed);
+    const ids = completedTodos.map(todo => todo.id);
+
+    setLoadingIds(prev => [...prev, ...ids]);
+
+    let hasError = false;
+
+    await Promise.all(
+      completedTodos.map(todo =>
+        deleteTodo(todo.id)
+          .then(() => {
+            setTodos(prev => prev.filter(t => t.id !== todo.id));
+          })
+          .catch(() => {
+            hasError = true;
+          }),
+      ),
+    );
+
+    if (hasError) {
+      showError('Unable to delete a todo');
+    }
+
+    setLoadingIds(prev => prev.filter(id => !ids.includes(id)));
+    inputRef.current?.focus();
+  };
+
+  const filteredTodos = getFilteredTodos(todos, filter);
+  const hasTodos = todos.length > 0;
 
   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
+          todos={todos}
+          newTodoTitle={newTodoTitle}
+          isInputDisabled={isInputDisabled}
+          onTitleChange={setNewTodoTitle}
+          onSubmit={handleSubmit}
+          onToggleAll={handleToggleAll}
+          inputRef={inputRef}
+        />
+
+        {(hasTodos || tempTodo) && (
+          <TodoList
+            todos={filteredTodos}
+            tempTodo={tempTodo}
+            loadingIds={loadingIds}
+            onDelete={handleDeleteTodo}
+            onUpdate={handleUpdateTodo}
+          />
+        )}
+
+        {hasTodos && (
+          <Footer
+            todos={todos}
+            filter={filter}
+            onFilterChange={setFilter}
+            onClearCompleted={handleClearCompleted}
+          />
+        )}
+      </div>
+
+      <ErrorNotification error={errorMessage} onClose={hideError} />
+    </div>
   );
 };
+
+export const App: React.FC = () => {
+  const userId = getUserId();
+
+  if (!userId) {
+    return <UserWarning />;
+  }
+
+  return <TodoApp userId={userId} />;
+};

src/api/todos.ts

@@ -0,0 +1,18 @@
+import { Todo } from '../types/Todo';
+import { client } from '../utils/fetchClient';
+
+export function getTodos(userId: number): Promise<Todo[]> {
+  return client.get<Todo[]>(`/todos?userId=${userId}`);
+}
+
+export function createTodo(userId: number, title: string): Promise<Todo> {
+  return client.post<Todo>('/todos', { userId, title, completed: false });
+}
+
+export function deleteTodo(todoId: number): Promise<unknown> {
+  return client.delete(`/todos/${todoId}`);
+}
+
+export function updateTodo(todoId: number, data: Partial<Todo>): Promise<Todo> {
+  return client.patch<Todo>(`/todos/${todoId}`, data);
+}

src/components/ErrorNotification.tsx

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