solution

package.json

@@ -15,7 +15,7 @@
   },
   "devDependencies": {
     "@cypress/react18": "^2.0.1",
-    "@mate-academy/scripts": "^1.8.5",
+    "@mate-academy/scripts": "^1.9.12",
     "@mate-academy/students-ts-config": "*",
     "@mate-academy/stylelint-config": "*",
     "@types/node": "^20.14.10",

src/App.tsx

@@ -1,26 +1,174 @@
-/* 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, { useEffect, useMemo, useState } from 'react';
 import { UserWarning } from './UserWarning';
+import * as clientTodo from './api/todos';
+import { getFilteredTodos } from './utils/getFilteredTodos';
 
-const USER_ID = 0;
+import { ErrorMessage } from './types/ErrorMessage';
+import { Todo } from './types/Todo';
+import { Status } from './types/Status';
+
+import { TodoHeader } from './components/TodoHeader';
+import { TodoFooter } from './components/TodoFooter';
+import { ErrorNotification } from './components/ErrorNotification';
+import { TodoList } from './components/TodoList';
 
 export const App: React.FC = () => {
-  if (!USER_ID) {
+  const [todos, setTodos] = useState<Todo[]>([]);
+  const [activeStatus, setActiveStatus] = useState(Status.All);
+  const [tempTodo, setTempTodo] = useState<Todo | null>(null);
+  const [loadingTodoIds, setLoadingTodoIds] = useState<number[]>([]);
+  const [errorMessage, setErrorMessage] = useState<ErrorMessage>(
+    ErrorMessage.Default,
+  );
+
+  const filteredTodos = useMemo(
+    () => getFilteredTodos(todos, activeStatus),
+    [todos, activeStatus],
+  );
+  const notCompletedTodos = useMemo(
+    () => todos.filter(todo => !todo.completed),
+    [todos],
+  );
+  const completedTodos = useMemo(
+    () => todos.filter(todo => todo.completed),
+    [todos],
+  );
+  const isToogleAll = completedTodos.length === todos.length;
+
+  const onAddTodo = (title: string) => {
+    setTempTodo({
+      id: 0,
+      title,
+      userId: clientTodo.USER_ID,
+      completed: false,
+    });
+
+    const newTodo: Omit<Todo, 'id'> = {
+      title,
+      userId: clientTodo.USER_ID,
+      completed: false,
+    };
+
+    return clientTodo
+      .createTodos(newTodo)
+      .then(todo => setTodos(currentTodos => [...currentTodos, todo]))
+      .catch(err => {
+        setErrorMessage(ErrorMessage.UnableToAdd);
+        throw err;
+      })
+      .finally(() => setTempTodo(null));
+  };
+
+  const onUpdateTodo = (todoToUpdate: Todo) => {
+    setLoadingTodoIds(prevTodos => [...prevTodos, todoToUpdate.id]);
+
+    return clientTodo
+      .updateTodo(todoToUpdate)
+      .then(updatedTodo => {
+        setTodos(currentTodos => {
+          return currentTodos.map(todo =>
+            todo.id === updatedTodo.id ? updatedTodo : todo,
+          );
+        });
+      })
+      .catch(err => {
+        setErrorMessage(ErrorMessage.UnableToUpdate);
+        throw err;
+      })
+      .finally(() => {
+        setLoadingTodoIds(prevTodos =>
+          prevTodos.filter(id => todoToUpdate.id !== id),
+        );
+      });
+  };
+
+  const onDeleteTodo = (todoId: number) => {
+    setLoadingTodoIds(prevTodos => [...prevTodos, todoId]);
+
+    clientTodo
+      .deleteTodo(todoId)
+      .then(() =>
+        setTodos(currentTodos =>
+          currentTodos.filter(todo => todo.id !== todoId),
+        ),
+      )
+      .catch(() => {
+        setErrorMessage(ErrorMessage.UnableToDelete);
+      })
+      .finally(() =>
+        setLoadingTodoIds(prevTodos => prevTodos.filter(id => todoId !== id)),
+      );
+  };
+
+  const onDeleteAllCompleted = () => {
+    completedTodos.forEach(todo => onDeleteTodo(todo.id));
+  };
+
+  const onToggleAll = () => {
+    if (todos.every(todo => todo.completed)) {
+      todos.forEach(todo => onUpdateTodo({ ...todo, completed: false }));
+    } else {
+      todos.filter(todo => {
+        if (!todo.completed) {
+          onUpdateTodo({ ...todo, completed: true });
+        }
+      });
+    }
+  };
+
+  useEffect(() => {
+    clientTodo
+      .getTodos()
+      .then(data => setTodos(data))
+      .catch(() => {
+        setErrorMessage(ErrorMessage.UnableToLoad);
+      });
+  }, []);
+
+  if (!clientTodo.USER_ID) {
     return <UserWarning />;
   }
 
   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">
+        <TodoHeader
+          error={errorMessage}
+          isToogleAll={todos.length === 0 ? null : isToogleAll}
+          isInputDisablet={!!tempTodo}
+          isDeletedTodos={todos.length}
+          onAddTodo={onAddTodo}
+          onToggleAll={onToggleAll}
+          setErrorMessage={setErrorMessage}
+        />
+
+        <TodoList
+          tempTodo={tempTodo}
+          filteredTodos={filteredTodos}
+          loadingTodoIds={loadingTodoIds}
+          onDeleteTodo={onDeleteTodo}
+          onUpdateTodo={onUpdateTodo}
+        />
+
+        {!!todos.length && (
+          <TodoFooter
+            activeStatus={activeStatus}
+            completedTodos={completedTodos.length}
+            notCompletedTodos={notCompletedTodos.length}
+            onDeleteAllCompleted={onDeleteAllCompleted}
+            setActiveStatus={setActiveStatus}
+          />
+        )}
+      </div>
+
+      <ErrorNotification
+        error={errorMessage}
+        setErrorMessage={setErrorMessage}
+      />
+    </div>
   );
 };

src/api/todos.ts

@@ -0,0 +1,20 @@
+import { Todo } from '../types/Todo';
+import { client } from '../utils/fetchClient';
+
+export const USER_ID = 2135;
+
+export const getTodos = () => {
+  return client.get<Todo[]>(`/todos?userId=${USER_ID}`);
+};
+
+export const createTodos = ({ title, userId, completed }: Omit<Todo, 'id'>) => {
+  return client.post<Todo>(`/todos`, { title, userId, completed });
+};
+
+export const deleteTodo = (id: number) => {
+  return client.delete(`/todos/${id}`);
+};
+
+export const updateTodo = ({ id, title, completed, userId }: Todo) => {
+  return client.patch<Todo>(`/todos/${id}`, { title, completed, userId });
+};

src/components/ErrorNotification.tsx

@@ -0,0 +1,44 @@
+import React, { useEffect } from 'react';
+import cn from 'classnames';
+import { ErrorMessage } from '../types/ErrorMessage';
+
+type Props = {
+  error: string;
+  setErrorMessage: (error: ErrorMessage) => void;
+};
+
+export const ErrorNotification: React.FC<Props> = props => {
+  const { error, setErrorMessage } = props;
+
+  useEffect(() => {
+    if (error === ErrorMessage.Default) {
+      return;
+    }
+
+    const timer = setTimeout(() => {
+      setErrorMessage(ErrorMessage.Default);
+    }, 3000);
+
+    return () => clearTimeout(timer);
+  }, [error, setErrorMessage]);
+
+  return (
+    <div
+      data-cy="ErrorNotification"
+      className={cn(
+        'notification',
+        'is-danger',
+        'is-light has-text-weight-normal',
+        { hidden: !error },
+      )}
+    >
+      <button
+        data-cy="HideErrorButton"
+        type="button"
+        className="delete"
+        onClick={() => setErrorMessage}
+      />
+      {error}
+    </div>
+  );
+};

src/components/TodoFooter.tsx

@@ -0,0 +1,56 @@
+/* eslint-disable prettier/prettier */
+import React from 'react';
+import cn from 'classnames';
+import { Status } from '../types/Status';
+
+type Props = {
+  activeStatus: Status;
+  completedTodos: number;
+  notCompletedTodos: number;
+  onDeleteAllCompleted: () => void;
+  setActiveStatus: (status: Status) => void;
+};
+
+export const TodoFooter: React.FC<Props> = props => {
+  const {
+    activeStatus,
+    completedTodos,
+    notCompletedTodos,
+    onDeleteAllCompleted,
+    setActiveStatus,
+  } = props;
+
+  return (
+    <footer className="todoapp__footer" data-cy="Footer">
+      <span className="todo-count" data-cy="TodosCounter">
+        {notCompletedTodos} items left
+      </span>
+
+      <nav className="filter" data-cy="Filter">
+        {Object.values(Status).map(status => (
+          <a
+            key={status}
+            data-cy={`FilterLink${status}`}
+            href={status === 'All' ? '#/' : `#/${status.toLowerCase()}`}
+            className={cn('filter__link', {
+              selected: activeStatus === status,
+            })}
+            onClick={() => setActiveStatus(status)}
+          >
+            {status}
+          </a>
+        ))}
+      </nav>
+
+      <button
+        type="button"
+        className="todoapp__clear-completed"
+        data-cy="ClearCompletedButton"
+        disabled={completedTodos === 0}
+        onClick={onDeleteAllCompleted}
+      >
+        Clear completed
+      </button>
+    </footer>
+  );
+};

src/components/TodoHeader.tsx

@@ -0,0 +1,76 @@
+import React, { useEffect, useRef, useState } from 'react';
+import cn from 'classnames';
+import { ErrorMessage } from '../types/ErrorMessage';
+
+type Props = {
+  error: ErrorMessage;
+  isToogleAll: boolean | null;
+  isInputDisablet: boolean;
+  isDeletedTodos: number;
+  onAddTodo: (title: string) => Promise<void>;
+  onToggleAll: () => void;
+  setErrorMessage: (error: ErrorMessage) => void;
+};
+
+export const TodoHeader: React.FC<Props> = props => {
+  const {
+    error,
+    isToogleAll,
+    isInputDisablet,
+    isDeletedTodos,
+    onAddTodo,
+    onToggleAll,
+    setErrorMessage,
+  } = props;
+
+  const [title, setTitle] = useState('');
+  const inputRef = useRef<HTMLInputElement | null>(null);
+
+  useEffect(() => {
+    if (inputRef.current) {
+      inputRef.current.focus();
+    }
+  }, [inputRef, isInputDisablet, isDeletedTodos]);
+
+  const handleSubmit = async (event: React.FormEvent<HTMLFormElement>) => {
+    event.preventDefault();
+
+    if (error !== ErrorMessage.Default) {
+      setErrorMessage(ErrorMessage.Default);
+    }
+
+    if (!title.trim()) {
+      setErrorMessage(ErrorMessage.EmptyTitle);
+
+      return;
+    }
+
+    onAddTodo(title.trim()).then(() => setTitle(''));
+  };
+
+  return (
+    <header className="todoapp__header">
+      {isToogleAll !== null && (
+        <button
+          type="button"
+          className={cn('todoapp__toggle-all', { active: isToogleAll })}
+          data-cy="ToggleAllButton"
+          onClick={onToggleAll}
+        />
+      )}
+
+      <form onSubmit={handleSubmit}>
+        <input
+          data-cy="NewTodoField"
+          type="text"
+          className="todoapp__new-todo"
+          placeholder="What needs to be done?"
+          ref={inputRef}
+          value={title}
+          onChange={event => setTitle(event.target.value)}
+          disabled={isInputDisablet}
+        />
+      </form>
+    </header>
+  );
+};