solution

src/App.tsx

@@ -1,26 +1,146 @@
 /* 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 { USER_ID } from './api/todos';
+import * as servisesTodos from './api/todos';
+import { Todo } from './types/Todo';
+import { TodoInput } from './components/TodoInput';
+import { TodoList } from './components/TodoList';
+import { ErrorNotification } from './components/Errors';
+import { Footer } from './components/Footer';
+import { Filter } from './types/Filter';
 
-const USER_ID = 0;
+export enum FilterParam {
+  All = 'All',
+  Active = 'Active',
+  Completed = 'Completed',
+}
 
 export const App: React.FC = () => {
+  const [todos, setTodos] = useState<Todo[]>([]);
+  const [errorMessage, setErrorMessage] = useState('');
+  const [filter, setFilter] = useState<Filter>(FilterParam.All);
+  const [tempTodo, setTempTodo] = useState<Todo | null>(null);
+  const [loadingIds, setLoadingIds] = useState<number[]>([]);
+
+  useEffect(() => {
+    servisesTodos
+      .getTodos()
+      .then(setTodos)
+      .catch(() => {
+        setErrorMessage('Unable to load todos');
+      });
+  }, []);
+
+  useEffect(() => {
+    setTimeout(() => {
+      setErrorMessage('');
+    }, 3000);
+  }, [errorMessage]);
+
+  const filteredTodos = useMemo(() => {
+    if (filter === FilterParam.Active) {
+      return todos.filter(todo => !todo.completed);
+    }
+
+    if (filter === FilterParam.Completed) {
+      return todos.filter(todo => todo.completed);
+    }
+
+    return todos;
+  }, [filter, todos]);
+
+  const handleDeleteTodo = (todoId: number) => {
+    setLoadingIds(current => [...current, todoId]);
+
+    return servisesTodos
+      .deleteTodo(todoId)
+      .then(() => {
+        setTodos(currentTodo => currentTodo.filter(todo => todo.id !== todoId));
+      })
+      .catch(error => {
+        setErrorMessage('Unable to delete a todo');
+        throw error;
+      })
+      .finally(() => {
+        setLoadingIds(current => current.filter(id => id !== todoId));
+      });
+  };
+
+  const handleUpdateTodo = async (
+    todoId: number,
+    newTitle: string,
+    completed: boolean,
+  ): Promise<void> => {
+    setLoadingIds(current => [...current, todoId]);
+    const todoToUpdate = todos.find(todo => todo.id === todoId);
+
+    if (!todoToUpdate) {
+      setLoadingIds(current => current.filter(id => id !== todoId));
+
+      return Promise.resolve();
+    }
+
+    const updatedTodo = {
+      ...todoToUpdate,
+      title: newTitle.trim(),
+      completed,
+    };
+
+    try {
+      await servisesTodos.updateTodo(todoId, updatedTodo);
+      setTodos(currentTodo =>
+        currentTodo.map(todo => (todo.id === todoId ? updatedTodo : todo)),
+      );
+    } catch (error) {
+      setErrorMessage('Unable to update a todo');
+      throw error;
+    } finally {
+      setLoadingIds(current => current.filter(id => id !== todoId));
+    }
+  };
+
   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>
-
-      <p className="subtitle">Styles are already copied</p>
-    </section>
+    <div className="todoapp">
+      <h1 className="todoapp__title">todos</h1>
+
+      <div className="todoapp__content">
+        <TodoInput
+          setErrorMessage={setErrorMessage}
+          todos={todos}
+          setTodos={setTodos}
+          setTempTodo={setTempTodo}
+          tempTodo={tempTodo}
+          handleUpdateTodo={handleUpdateTodo}
+          loadingIds={loadingIds}
+        />
+
+        <TodoList
+          filteredTodos={filteredTodos}
+          tempTodo={tempTodo}
+          handleDeleteTodo={handleDeleteTodo}
+          handleUpdateTodo={handleUpdateTodo}
+          loadingIds={loadingIds}
+        />
+        {todos.length > 0 && (
+          <Footer
+            filter={filter}
+            setFilter={setFilter}
+            todos={todos}
+            handleDeleteTodo={handleDeleteTodo}
+          />
+        )}
+      </div>
+      <ErrorNotification
+        errorMessage={errorMessage}
+        setErrorMessage={setErrorMessage}
+      />
+    </div>
   );
 };

src/api/todos.ts

@@ -0,0 +1,21 @@
+import { Todo } from '../types/Todo';
+import { client } from '../utils/fetchClient';
+
+export const USER_ID = 1913;
+
+export const getTodos = () => {
+  return client.get<Todo[]>(`/todos?userId=${USER_ID}`);
+};
+
+export const postTodos = ({ title, userId, completed }: Omit<Todo, 'id'>) => {
+  return client.post<Todo>(`/todos/`, { title, userId, completed });
+};
+
+export const deleteTodo = (todoId: number) => {
+  return client.delete(`/todos/${todoId}`);
+};
+
+export const updateTodo = (todoId: number, todo: Todo) => {
+  return client.patch(`/todos/${todoId}`, todo);
+};
+// Add more methods here

src/components/Errors.tsx

@@ -0,0 +1,35 @@
+import classNames from 'classnames';
+import React from 'react';
+
+type Props = {
+  errorMessage: string;
+  setErrorMessage: (a: string) => void;
+};
+
+export const ErrorNotification: React.FC<Props> = ({
+  errorMessage,
+  setErrorMessage,
+}) => {
+  const handleCloseNotification = () => {
+    setErrorMessage('');
+  };
+
+  return (
+    <div
+      data-cy="ErrorNotification"
+      className={classNames(
+        'notification is-danger is-light has-text-weight-normal',
+        // eslint-disable-next-line prettier/prettier
+        { hidden: !errorMessage },
+      )}
+    >
+      <button
+        onClick={handleCloseNotification}
+        data-cy="HideErrorButton"
+        type="button"
+        className="delete"
+      />
+      {errorMessage}
+    </div>
+  );
+};

src/components/Footer.tsx

@@ -0,0 +1,69 @@
+import classNames from 'classnames';
+import { Todo } from '../types/Todo';
+import { Filter } from '../types/Filter';
+import { FilterParam } from '../App';
+import React from 'react';
+
+type Props = {
+  filter: string;
+  setFilter: (a: Filter) => void;
+  todos: Todo[];
+  handleDeleteTodo: (a: number) => void;
+};
+
+export const Footer: React.FC<Props> = ({
+  filter,
+  setFilter,
+  todos,
+  handleDeleteTodo,
+}) => {
+  const handleFilter = (event: React.MouseEvent<HTMLElement>) => {
+    const filterValue = event.currentTarget.textContent as Filter;
+
+    setFilter(filterValue);
+  };
+
+  const handleClearComplete = () => {
+    const completedTodos = todos.filter(todo => todo.completed);
+    const deletePromises = completedTodos.map(todo =>
+      handleDeleteTodo(todo.id),
+    );
+
+    Promise.allSettled(deletePromises);
+  };
+
+  const amountActiveTodos = todos.filter(todo => !todo.completed).length;
+
+  return (
+    <footer className="todoapp__footer" data-cy="Footer">
+      <span className="todo-count" data-cy="TodosCounter">
+        {amountActiveTodos} items left
+      </span>
+
+      <nav className="filter" data-cy="Filter">
+        {Object.values(FilterParam).map(param => (
+          <a
+            key={param}
+            href="#/"
+            className={classNames('filter__link', {
+              selected: filter === param,
+            })}
+            data-cy={`FilterLink${param}`}
+            onClick={handleFilter}
+          >
+            {param}
+          </a>
+        ))}
+      </nav>
+      <button
+        type="button"
+        className="todoapp__clear-completed"
+        data-cy="ClearCompletedButton"
+        disabled={todos.every(todo => !todo.completed)}
+        onClick={handleClearComplete}
+      >
+        Clear completed
+      </button>
+    </footer>
+  );
+};

src/components/TodoInput.tsx

@@ -0,0 +1,103 @@
+import { useEffect, useRef, useState } from 'react';
+import * as servisesTodos from '../api/todos';
+import { Todo } from '../types/Todo';
+import classNames from 'classnames';
+import React from 'react';
+
+const userId = servisesTodos.USER_ID;
+
+type Props = {
+  setErrorMessage: (a: string) => void;
+  todos: Todo[];
+  setTodos: (a: Todo[]) => void;
+  setTempTodo: (a: Todo | null) => void;
+  tempTodo: Todo | null;
+  handleUpdateTodo: (a: number, b: string, c: boolean) => void;
+  loadingIds: number[];
+};
+
+export const TodoInput: React.FC<Props> = ({
+  setErrorMessage,
+  todos,
+  setTodos,
+  setTempTodo,
+  tempTodo,
+  handleUpdateTodo,
+  loadingIds,
+}) => {
+  const [title, setTitle] = useState('');
+  const inputRef = useRef<HTMLInputElement>(null);
+  const AllCompletedTodo = todos.every(todo => todo.completed);
+
+  useEffect(() => {
+    if (inputRef.current) {
+      inputRef.current.focus();
+    }
+  }, [todos, tempTodo]);
+
+  const handleInputValue = (event: React.ChangeEvent<HTMLInputElement>) => {
+    setTitle(event.target.value);
+  };
+
+  const handleAddTodo = (event: React.KeyboardEvent<HTMLFormElement>) => {
+    if (event.key === 'Enter') {
+      event.preventDefault();
+      setTempTodo({ id: 0, title: title.trim(), userId, completed: false });
+      if (title.trim().length > 0) {
+        servisesTodos
+          .postTodos({ title: title.trim(), userId, completed: false })
+          .then(newTodo => {
+            setTodos([...todos, newTodo]);
+            setTitle('');
+            setTempTodo(null);
+          })
+          .catch(() => {
+            setTempTodo(null);
+            setErrorMessage('Unable to add a todo');
+          });
+      } else {
+        setTempTodo(null);
+        setErrorMessage('Title should not be empty');
+      }
+    }
+  };
+
+  const handleChangleAllStatus = () => {
+    const newCompletedStatus = !AllCompletedTodo;
+    const todosToUpdate = todos.filter(
+      todo => todo.completed !== newCompletedStatus,
+    );
+
+    todosToUpdate.map(todo =>
+      handleUpdateTodo(todo.id, todo.title, newCompletedStatus),
+    );
+  };
+
+  return (
+    <header className="todoapp__header">
+      {todos.length > 0 && (
+        <button
+          type="button"
+          className={classNames('todoapp__toggle-all', {
+            active: AllCompletedTodo,
+          })}
+          data-cy="ToggleAllButton"
+          onClick={handleChangleAllStatus}
+          disabled={loadingIds.length > 0}
+        />
+      )}
+      <form onKeyDown={handleAddTodo}>
+        <input
+          ref={inputRef}
+          data-cy="NewTodoField"
+          value={title}
+          type="text"
+          className="todoapp__new-todo"
+          placeholder="What needs to be done?"
+          onChange={handleInputValue}
+          disabled={!!tempTodo}
+        />
+      </form>
+    </header>
+  );
+};