solution

src/App.tsx

@@ -1,26 +1,185 @@
 /* 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, { useCallback, useEffect, useMemo, useState } from 'react';
 import { UserWarning } from './UserWarning';
-
-const USER_ID = 0;
+import {
+  createTodo,
+  deleteTodo,
+  getTodos,
+  updateTodo,
+  USER_ID,
+} from './api/todos';
+import { Todo } from './types/Todo';
+import { ErrorNotification } from './components/ErrorNotification';
+import { FilterType } from './types/FilterType';
+import { TodoList } from './components/TodoList';
+import { Footer } from './components/Footer';
+import { Header } from './components/Header';
+import { ErrorType } from './types/ErrorType';
 
 export const App: React.FC = () => {
+  const [todos, setTodos] = useState<Todo[]>([]);
+  const [errorTodos, setErrorTodos] = useState(ErrorType.NoErrors);
+  const [status, setStatus] = useState(FilterType.All);
+  const [isLoading, setIsLoading] = useState(true);
+  const [loadingTodosIds, setLoadingTodosIds] = useState<number[]>([]);
+
+  const [tempTodo, setTempTodo] = useState<Todo | null>(null);
+
+  useEffect(() => {
+    setIsLoading(true);
+    getTodos()
+      .then(setTodos)
+      .catch(() => {
+        setErrorTodos(ErrorType.Loading);
+      })
+      .finally(() => {
+        setIsLoading(false);
+      });
+  }, []);
+
+  const visibleTodos = todos.filter(todo => {
+    switch (status) {
+      case FilterType.Completed:
+        return todo.completed;
+      case FilterType.Active:
+        return !todo.completed;
+      default:
+        return true;
+    }
+  });
+
+  const activeTodosCount = useMemo(
+    () => todos.filter(todo => !todo.completed).length,
+    [todos],
+  );
+
+  const completedTodos = useMemo(
+    () => todos.filter(todo => todo.completed),
+    [todos],
+  );
+
+  const completedTodosCount = completedTodos.length;
+
+  const handleErrorClose = useCallback(() => {
+    setErrorTodos(ErrorType.NoErrors);
+  }, []);
+
+  const onAddTodo = useCallback(
+    async (newTodo: Omit<Todo, 'id'>): Promise<void> => {
+      try {
+        const createdTodo = await createTodo(newTodo);
+
+        setTodos(currentTodos => [...currentTodos, createdTodo]);
+      } catch (error) {
+        setErrorTodos(ErrorType.Add);
+        throw error;
+      }
+    },
+    [],
+  );
+
+  const onDeleteTodo = useCallback(async (todoId: number) => {
+    setLoadingTodosIds(currentIds => [...currentIds, todoId]);
+    try {
+      await deleteTodo(todoId);
+      setTodos(currentTodos => currentTodos.filter(todo => todo.id !== todoId));
+    } catch (error) {
+      setErrorTodos(ErrorType.Delete);
+      throw error;
+    } finally {
+      setLoadingTodosIds(currentIds => currentIds.filter(id => id !== todoId));
+    }
+  }, []);
+
+  const onDeleteAllCompleted = useCallback(() => {
+    completedTodos.forEach(completedTodo => {
+      onDeleteTodo(completedTodo.id);
+    });
+  }, [completedTodos, onDeleteTodo]);
+
+  const onUpdateTodo = useCallback(async (newTodo: Todo) => {
+    setLoadingTodosIds(currentIds => [...currentIds, newTodo.id]);
+    try {
+      const updatedTodo = await updateTodo(newTodo);
+
+      setTodos(currentTodos =>
+        currentTodos.map(todo => {
+          return todo.id === updatedTodo.id ? updatedTodo : todo;
+        }),
+      );
+    } catch (error) {
+      setErrorTodos(ErrorType.Update);
+      throw error;
+    } finally {
+      setLoadingTodosIds(currentIds =>
+        currentIds.filter(id => id !== newTodo.id),
+      );
+    }
+  }, []);
+
+  const onUpdateToggleAll = useCallback(() => {
+    todos.forEach(todo => {
+      if (todos.length === completedTodosCount) {
+        onUpdateTodo({ ...todo, completed: false });
+
+        return;
+      }
+
+      if (todo.completed === false) {
+        onUpdateTodo({ ...todo, completed: true });
+
+        return;
+      }
+    });
+  }, [todos, completedTodosCount, onUpdateTodo]);
+
   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">
+        <Header
+          todos={todos}
+          completedTodosCount={completedTodosCount}
+          onAddTodo={onAddTodo}
+          setErrorTodos={setErrorTodos}
+          tempTodo={tempTodo}
+          setTempTodo={setTempTodo}
+          onUpdateToggleAll={onUpdateToggleAll}
+        />
+
+        {!!todos.length && (
+          <>
+            <TodoList
+              todos={visibleTodos}
+              onDeleteTodo={onDeleteTodo}
+              onUpdateTodo={onUpdateTodo}
+              isDataLoading={isLoading}
+              loadingTodosIds={loadingTodosIds}
+              tempTodo={tempTodo}
+            />
+
+            <Footer
+              activeCount={activeTodosCount}
+              completedCount={completedTodosCount}
+              status={status}
+              setStatus={setStatus}
+              onDeleteAllCompleted={onDeleteAllCompleted}
+            />
+          </>
+        )}
+      </div>
+
+      <ErrorNotification
+        error={errorTodos}
+        handleErrorClose={handleErrorClose}
+      />
+    </div>
   );
 };

src/api/todos.ts

@@ -0,0 +1,20 @@
+import { Todo } from '../types/Todo';
+import { client } from '../utils/fetchClient';
+
+export const USER_ID = 2153;
+
+export const getTodos = () => {
+  return client.get<Todo[]>(`/todos?userId=${USER_ID}`);
+};
+
+export const deleteTodo = (todoId: number) => {
+  return client.delete(`/todos/${todoId}`);
+};
+
+export const createTodo = (newTodo: Omit<Todo, 'id'>) => {
+  return client.post<Todo>(`/todos`, newTodo);
+};
+
+export const updateTodo = ({ id, title, userId, completed }: Todo) => {
+  return client.patch<Todo>(`/todos/${id}`, { id, title, userId, completed });
+};

src/components/ErrorNotification/ErrorNotification.tsx

@@ -0,0 +1,43 @@
+import React, { useEffect } from 'react';
+import cn from 'classnames';
+import { ErrorType } from '../../types/ErrorType';
+
+type Props = {
+  error: string;
+  handleErrorClose: () => void;
+};
+
+export const ErrorNotification: React.FC<Props> = props => {
+  const { error, handleErrorClose } = props;
+
+  useEffect(() => {
+    if (error === ErrorType.NoErrors) {
+      return;
+    }
+
+    const timeoutId = setTimeout(() => {
+      handleErrorClose();
+    }, 3000);
+
+    return () => {
+      clearTimeout(timeoutId);
+    };
+  }, [error, handleErrorClose]);
+
+  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={handleErrorClose}
+      />
+      {error}
+    </div>
+  );
+};

src/components/ErrorNotification/index.tsx

@@ -0,0 +1 @@
+export * from './ErrorNotification';

src/components/Footer/Footer.tsx

@@ -0,0 +1,58 @@
+import React from 'react';
+import cn from 'classnames';
+import { FilterType } from '../../types/FilterType';
+import { Dispatch, SetStateAction } from 'react';
+
+type Props = {
+  activeCount: number | undefined;
+  completedCount: number | undefined;
+  status: FilterType;
+  setStatus: Dispatch<SetStateAction<FilterType>>;
+  onDeleteAllCompleted: () => void;
+};
+
+export const Footer: React.FC<Props> = props => {
+  const {
+    activeCount,
+    completedCount,
+    status,
+    setStatus,
+    onDeleteAllCompleted,
+  } = props;
+
+  return (
+    <footer className="todoapp__footer" data-cy="Footer">
+      <span className="todo-count" data-cy="TodosCounter">
+        {activeCount} items left
+      </span>
+
+      <nav className="filter" data-cy="Filter">
+        {Object.values(FilterType).map(filter => (
+          <a
+            key={filter}
+            href={`#/${filter !== FilterType.All && filter.toLowerCase()}`}
+            className={cn('filter__link', {
+              selected: status === filter,
+            })}
+            data-cy={`FilterLink${filter}`}
+            onClick={() => {
+              setStatus(filter);
+            }}
+          >
+            {filter}
+          </a>
+        ))}
+      </nav>
+
+      <button
+        type="button"
+        className="todoapp__clear-completed"
+        data-cy="ClearCompletedButton"
+        onClick={onDeleteAllCompleted}
+        disabled={!completedCount}
+      >
+        Clear completed
+      </button>
+    </footer>
+  );
+};

src/components/Footer/index.tsx

@@ -0,0 +1 @@
+export * from './Footer';