Solutiion

src/App.tsx

@@ -1,26 +1,16 @@
-/* eslint-disable max-len */
-/* eslint-disable jsx-a11y/control-has-associated-label */
-import React from 'react';
-import { UserWarning } from './UserWarning';
-
-const USER_ID = 0;
+// /* eslint-disable jsx-a11y/control-has-associated-label */
+// /* eslint-disable jsx-a11y/label-has-associated-control */
 
-export const App: React.FC = () => {
-  if (!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>
+import { USER_ID } from './api/todos';
+import { Todos } from './components/Todo/Todos';
+import { TodosProvider } from './context/TodoContext';
+import { UserWarning } from './UserWarning';
 
-      <p className="subtitle">Styles are already copied</p>
-    </section>
+export const App = () =>
+  !USER_ID ? (
+    <UserWarning />
+  ) : (
+    <TodosProvider>
+      <Todos />
+    </TodosProvider>
   );
-};

src/api/todos.ts

@@ -0,0 +1,24 @@
+import { TODOS_API_PATH } from '../constants/api';
+import { Todo } from '../types/Todo';
+import { client } from '../utils/fetchClient';
+
+export const USER_ID = 1826;
+
+export const getTodos = () => {
+  return client.get<Todo[]>(`${TODOS_API_PATH}?userId=${USER_ID}`);
+};
+
+export const getTodoById = (id: number) => client.get(`/todos/${id}`);
+
+export const getAllCompletedTodoByUserId = (id: number) => {
+  client.get(`${TODOS_API_PATH}?userId=${id}&completed=true`);
+};
+
+export const addTodo = ({ title, completed, userId }: Omit<Todo, 'id'>) =>
+  client.post<Todo>(TODOS_API_PATH, { title, completed, userId });
+
+export const updateTodo = (todo: Todo, id: number): Promise<Todo> =>
+  client.patch(`${TODOS_API_PATH}/${id}`, todo);
+
+export const deleteTodo = (id: number) =>
+  client.delete(`${TODOS_API_PATH}/${id}`);

src/components/ErrorNotification/ErrorNotification.tsx

@@ -0,0 +1,20 @@
+import { FC } from 'react';
+import { getTodoErrorsMessage } from '../../utils/todos/getTodoErrorsMessage';
+import cn from 'classnames';
+import { TodoErrors } from '../../utils/enums/TodoErrors';
+
+interface ErrorNotificationProps {
+  error: TodoErrors | null;
+}
+
+export const ErrorNotification: FC<ErrorNotificationProps> = ({ error }) => (
+  <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" />
+    {error && getTodoErrorsMessage(error)}
+  </div>
+);

src/components/Todo/TodoFooter/TodoFooter.tsx

@@ -0,0 +1,61 @@
+import { Dispatch, FC, SetStateAction } from 'react';
+import cn from 'classnames';
+
+import { Todo } from '../../../types/Todo';
+import { TODO_FILTER_OPTIONS } from '../../../constants/TodoFilter';
+
+import { FilterStatuses } from '../../../utils/enums/FilterStatuses';
+import {
+  getInCompletedTodos,
+  hasCompletedTodos,
+} from '../../../utils/todos/getTodos';
+import { useDeleteTodo } from '../../../hooks/useDeleteTodo';
+
+interface TodoFooterProps {
+  todos: Todo[];
+  setStatus: Dispatch<SetStateAction<FilterStatuses>>;
+  status: FilterStatuses;
+}
+
+export const TodoFooter: FC<TodoFooterProps> = ({
+  todos,
+  setStatus,
+  status,
+}) => {
+  const isCompletedTodoCounter = getInCompletedTodos(todos).length;
+  const { handleDeleteCompletedTodos } = useDeleteTodo();
+
+  return (
+    <footer className="todoapp__footer" data-cy="Footer">
+      <span className="todo-count" data-cy="TodosCounter">
+        {isCompletedTodoCounter}
+        {isCompletedTodoCounter === 1 ? ' item ' : ' items '}
+        left
+      </span>
+
+      <nav className="filter" data-cy="Filter">
+        {TODO_FILTER_OPTIONS.map(({ value, title, href, id }) => (
+          <a
+            href={href}
+            className={cn('filter__link', { selected: status === value })}
+            data-cy={`FilterLink${title}`}
+            key={id}
+            onClick={() => setStatus(value)}
+          >
+            {title}
+          </a>
+        ))}
+      </nav>
+
+      <button
+        type="button"
+        className="todoapp__clear-completed"
+        data-cy="ClearCompletedButton"
+        disabled={!hasCompletedTodos(todos)}
+        onClick={handleDeleteCompletedTodos}
+      >
+        Clear completed
+      </button>
+    </footer>
+  );
+};

src/components/Todo/TodoForm/TodoForm.tsx

@@ -0,0 +1,25 @@
+import { useContext } from 'react';
+
+import { TodosContext } from '../../../context/TodoContext';
+import { useTodoFormManager } from '../../../hooks/useTodoFormManager';
+
+export const TodoForm = () => {
+  const { inputRef } = useContext(TodosContext);
+  const { title, handleSubmit, handleChangeTitle, isInputDisabled } =
+    useTodoFormManager();
+
+  return (
+    <form onSubmit={handleSubmit}>
+      <input
+        data-cy="NewTodoField"
+        type="text"
+        className="todoapp__new-todo"
+        placeholder="What needs to be done?"
+        value={title}
+        ref={inputRef}
+        disabled={isInputDisabled}
+        onChange={handleChangeTitle}
+      />
+    </form>
+  );
+};

src/components/Todo/TodoHeader/TodoHeader.tsx

@@ -0,0 +1,32 @@
+import { FC, useEffect, useMemo, useState } from 'react';
+import cn from 'classnames';
+
+import { Todo } from '../../../types/Todo';
+import { isAllTodosCompleted } from '../../../utils/todos/getTodos';
+import { TodoForm } from '../TodoForm/TodoForm';
+import { useTodoFormManager } from '../../../hooks/useTodoFormManager';
+
+interface TodoHeaderProps {
+  todos: Todo[];
+}
+
+export const TodoHeader: FC<TodoHeaderProps> = ({ todos }) => {
+  const { handleToogleAllTodoStatus } = useTodoFormManager();
+
+  return (
+    <header className="todoapp__header">
+      {!!todos.length && (
+        <button
+          type="button"
+          className={cn('todoapp__toggle-all', {
+            active: isAllTodosCompleted(todos),
+          })}
+          data-cy="ToggleAllButton"
+          onClick={handleToogleAllTodoStatus}
+        />
+      )}
+
+      <TodoForm />
+    </header>
+  );
+};

src/components/Todo/TodoItem/TodoItem.tsx

@@ -0,0 +1,100 @@
+import { FormEvent, forwardRef } from 'react';
+import { Todo } from '../../../types/Todo';
+import cn from 'classnames';
+import { useDeleteTodo } from '../../../hooks/useDeleteTodo';
+import { useTodoFormManager } from '../../../hooks/useTodoFormManager';
+import { useSelectedTodo } from '../../../hooks/useSelectedTodo';
+
+interface TodoItemProps {
+  todo: Todo;
+  isLoading?: boolean;
+}
+
+export const TodoItem = forwardRef<HTMLDivElement, TodoItemProps>(
+  ({ todo, isLoading = false }, ref) => {
+    const { completed, id, title } = todo;
+    const { isDeleting, handleDeleteTodo } = useDeleteTodo();
+    const { selectedTodo, setSelectedTodo } = useSelectedTodo();
+    const {
+      title: updatingTitle,
+      isUpdating,
+      setTitle,
+      handleUpdateTodo,
+    } = useTodoFormManager(todo.title);
+
+    const handleSubmit = async (event: FormEvent<HTMLFormElement>) => {
+      event.preventDefault();
+
+      if (title == updatingTitle) {
+        return setSelectedTodo(null);
+      }
+
+      const res = await handleUpdateTodo({ ...todo, title: updatingTitle });
+
+      if (res) {
+        setSelectedTodo(null);
+      }
+    };
+
+    return (
+      <div ref={ref} data-cy="Todo" className={cn('todo', { completed })}>
+        {/* eslint-disable jsx-a11y/label-has-associated-control */}
+        <label className="todo__status-label">
+          <input
+            data-cy="TodoStatus"
+            type="checkbox"
+            className="todo__status"
+            checked={completed}
+            onChange={() => {
+              handleUpdateTodo({ ...todo, completed: !todo.completed });
+            }}
+          />
+        </label>
+
+        {selectedTodo ? (
+          <form onSubmit={handleSubmit} onBlur={handleSubmit}>
+            <input
+              data-cy="TodoTitleField"
+              type="text"
+              className="todo__title-field"
+              placeholder="Empty todo will be deleted"
+              value={updatingTitle}
+              onChange={e => setTitle(e.target.value)}
+              autoFocus
+            />
+          </form>
+        ) : (
+          <span
+            data-cy="TodoTitle"
+            className="todo__title"
+            onDoubleClick={() => {
+              setSelectedTodo(todo);
+            }}
+          >
+            {title.trim()}
+          </span>
+        )}
+        {!selectedTodo && (
+          <button
+            type="button"
+            className="todo__remove"
+            data-cy="TodoDelete"
+            onClick={() => handleDeleteTodo(id)}
+          >
+            ×
+          </button>
+        )}
+
+        <div
+          data-cy="TodoLoader"
+          className={cn('modal overlay', {
+            'is-active': isLoading || isDeleting || isUpdating,
+          })}
+        >
+          <div className="modal-background has-background-white-ter" />
+          <div className="loader" />
+        </div>
+      </div>
+    );
+  },
+);

src/components/Todo/TodoList/TodoList.tsx

@@ -0,0 +1,56 @@
+import React, { FC, useContext, useRef } from 'react';
+import { Todo } from '../../../types/Todo';
+import { TodoItem } from '../TodoItem/TodoItem';
+import { TodosContext } from '../../../context/TodoContext';
+import { CSSTransition, TransitionGroup } from 'react-transition-group';
+
+interface TodoListProps {
+  todos: Todo[];
+}
+
+export const TodoList: FC<TodoListProps> = ({ todos }) => {
+  const { tempTodo } = useContext(TodosContext);
+
+  const refs = useRef<Record<number, React.RefObject<HTMLDivElement>>>({});
+
+  todos.forEach(todo => {
+    if (!refs.current[todo.id]) {
+      refs.current[todo.id] = React.createRef();
+    }
+  });
+
+  if (tempTodo && !refs.current[tempTodo.id]) {
+    refs.current[tempTodo.id] = React.createRef();
+  }
+
+  return (
+    <section className="todoapp__main" data-cy="TodoList">
+      <TransitionGroup>
+        {todos.map(todo => (
+          <CSSTransition
+            key={todo.id}
+            timeout={300}
+            classNames="item"
+            nodeRef={refs.current[todo.id]}
+          >
+            <TodoItem ref={refs.current[todo.id]} key={todo.id} todo={todo} />
+          </CSSTransition>
+        ))}
+        {tempTodo && (
+          <CSSTransition
+            key={tempTodo.id}
+            timeout={300}
+            classNames="temp-item"
+            nodeRef={refs.current[tempTodo.id]}
+          >
+            <TodoItem
+              ref={refs.current[tempTodo.id]}
+              todo={tempTodo}
+              isLoading={true}
+            />
+          </CSSTransition>
+        )}
+      </TransitionGroup>
+    </section>
+  );
+};