Solution

src/App.tsx

@@ -1,157 +1,85 @@
 /* eslint-disable jsx-a11y/control-has-associated-label */
-import React from 'react';
+import React, { useEffect } from 'react';
+import { UserWarning } from './UserWarning';
+import { getTodos } from './api/todos';
+import { Header } from './components/Header';
+import { Footer } from './components/Footer';
+import { Filter } from './types/Filter';
+import { TodoItem } from './components/TodoItem';
+import { focusInput } from './utils/services';
+import { ErrNotification } from './components/ErrNotification';
+import { useTodoContext } from './components/TodoContext';
+import { USER_ID } from './utils/constants';
 
 export const App: React.FC = () => {
+  const {
+    todos,
+    setTodos,
+    isLoading,
+    setIsLoading,
+    activeTodoId,
+    isSubmitting,
+    tempTodo,
+    inputRef,
+    filter,
+    showError,
+  } = useTodoContext();
+
+  useEffect(() => {
+    const fetchTodos = async () => {
+      setIsLoading(true);
+      try {
+        const fetchedTodos = await getTodos(USER_ID);
+
+        setTodos(fetchedTodos);
+      } catch {
+        showError('Unable to load todos');
+      } finally {
+        setIsLoading(false);
+      }
+    };
+
+    fetchTodos();
+  }, []);
+
+  useEffect(() => {
+    focusInput(inputRef);
+  }, [isSubmitting, activeTodoId, inputRef]);
+
+  const filteredTodos = todos.filter(todo => {
+    switch (filter) {
+      case Filter.Active:
+        return !todo.completed;
+      case Filter.Completed:
+        return todo.completed;
+      default:
+        return true;
+    }
+  });
+
+  if (!USER_ID) {
+    return <UserWarning />;
+  }
+
   return (
     <div className="todoapp">
       <h1 className="todoapp__title">todos</h1>
 
       <div className="todoapp__content">
-        <header className="todoapp__header">
-          {/* this button should have `active` class only if all todos are completed */}
-          <button
-            type="button"
-            className="todoapp__toggle-all active"
-            data-cy="ToggleAllButton"
-          />
-
-          {/* Add a todo on form submit */}
-          <form>
-            <input
-              data-cy="NewTodoField"
-              type="text"
-              className="todoapp__new-todo"
-              placeholder="What needs to be done?"
-            />
-          </form>
-        </header>
-
-        <section className="todoapp__main" data-cy="TodoList">
-          {/* This is a completed todo */}
-          <div data-cy="Todo" className="todo completed">
-            <label className="todo__status-label">
-              <input
-                data-cy="TodoStatus"
-                type="checkbox"
-                className="todo__status"
-                checked
-              />
-            </label>
-
-            <span data-cy="TodoTitle" className="todo__title">
-              Completed Todo
-            </span>
-
-            {/* Remove button appears only on hover */}
-            <button type="button" className="todo__remove" data-cy="TodoDelete">
-              ×
-            </button>
-          </div>
-
-          {/* This todo is an active todo */}
-          <div data-cy="Todo" className="todo">
-            <label className="todo__status-label">
-              <input
-                data-cy="TodoStatus"
-                type="checkbox"
-                className="todo__status"
-              />
-            </label>
-
-            <span data-cy="TodoTitle" className="todo__title">
-              Not Completed Todo
-            </span>
-
-            <button type="button" className="todo__remove" data-cy="TodoDelete">
-              ×
-            </button>
-          </div>
-
-          {/* This todo is being edited */}
-          <div data-cy="Todo" className="todo">
-            <label className="todo__status-label">
-              <input
-                data-cy="TodoStatus"
-                type="checkbox"
-                className="todo__status"
-              />
-            </label>
-
-            {/* This form is shown instead of the title and remove button */}
-            <form>
-              <input
-                data-cy="TodoTitleField"
-                type="text"
-                className="todo__title-field"
-                placeholder="Empty todo will be deleted"
-                value="Todo is being edited now"
-              />
-            </form>
-          </div>
-
-          {/* This todo is in loadind state */}
-          <div data-cy="Todo" className="todo">
-            <label className="todo__status-label">
-              <input
-                data-cy="TodoStatus"
-                type="checkbox"
-                className="todo__status"
-              />
-            </label>
-
-            <span data-cy="TodoTitle" className="todo__title">
-              Todo is being saved now
-            </span>
-
-            <button type="button" className="todo__remove" data-cy="TodoDelete">
-              ×
-            </button>
-          </div>
-        </section>
-
-        {/* Hide the footer if there are no todos */}
-        <footer className="todoapp__footer" data-cy="Footer">
-          <span className="todo-count" data-cy="TodosCounter">
-            3 items left
-          </span>
-
-          {/* Active link should have the 'selected' class */}
-          <nav className="filter" data-cy="Filter">
-            <a
-              href="#/"
-              className="filter__link selected"
-              data-cy="FilterLinkAll"
-            >
-              All
-            </a>
-
-            <a
-              href="#/active"
-              className="filter__link"
-              data-cy="FilterLinkActive"
-            >
-              Active
-            </a>
-
-            <a
-              href="#/completed"
-              className="filter__link"
-              data-cy="FilterLinkCompleted"
-            >
-              Completed
-            </a>
-          </nav>
-
-          {/* this button should be disabled if there are no completed todos */}
-          <button
-            type="button"
-            className="todoapp__clear-completed"
-            data-cy="ClearCompletedButton"
-          >
-            Clear completed
-          </button>
-        </footer>
+        <Header />
+        {!isLoading && (
+          <>
+            <section className="todoapp__main" data-cy="TodoList">
+              {filteredTodos.map(todo => (
+                <TodoItem todo={todo} key={todo.id} />
+              ))}
+              {tempTodo && <TodoItem todo={tempTodo} key={tempTodo.id} />}
+            </section>
+            {todos.length > 0 && <Footer />}
+          </>
+        )}
       </div>
+      <ErrNotification />
     </div>
   );
 };

src/UserWarning.tsx

@@ -0,0 +1,15 @@
+import React from 'react';
+
+export const UserWarning: React.FC = () => (
+  <section className="section">
+    <p className="box is-size-3">
+      Please get your <b> userId </b>{' '}
+      <a href="https://mate-academy.github.io/react_student-registration">
+        here
+      </a>{' '}
+      and save it in the app <pre>const USER_ID = ...</pre>
+      All requests to the API must be sent with this
+      <b> userId.</b>
+    </p>
+  </section>
+);

src/api/todos.ts

@@ -0,0 +1,22 @@
+import { Todo } from '../types/Todo';
+import { client } from '../utils/fetchClient';
+
+// Your userId is 1414
+// Please use it for all your requests to the Students API. For example:
+// https://mate.academy/students-api/todos?userId=1414
+
+export const getTodos = (userid: number) => {
+  return client.get<Todo[]>(`/todos?userId=${userid}`);
+};
+
+export function deleteTodo(todoId: number) {
+  return client.delete(`/todos/${todoId}`);
+}
+
+export function createTodo({ title, userId, completed }: Omit<Todo, 'id'>) {
+  return client.post<Todo>('/todos', { title, userId, completed });
+}
+
+export function updateTodo({ id, title, completed, userId }: Todo) {
+  return client.patch<Todo>(`/todos/${id}`, { title, completed, userId });
+}

src/components/ErrNotification.tsx

@@ -0,0 +1,26 @@
+import classNames from 'classnames';
+import { useTodoContext } from './TodoContext';
+
+type Props = {};
+
+export const ErrNotification: React.FC<Props> = () => {
+  const { error, setError } = useTodoContext();
+
+  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={() => setError('')}
+      />
+      <div>{error}</div>
+    </div>
+  );
+};

src/components/Footer.tsx

@@ -0,0 +1,83 @@
+import classNames from 'classnames';
+import { Filter } from '../types/Filter';
+import { useTodoContext } from './TodoContext';
+import { deleteTodo } from '../api/todos';
+import { focusInput } from '../utils/services';
+import { Todo } from '../types/Todo';
+
+type Props = {};
+
+export const Footer: React.FC<Props> = () => {
+  const {
+    todos,
+    setTodos,
+    showError,
+    setActiveTodoId,
+    inputRef,
+    filter,
+    setFilter,
+  } = useTodoContext();
+
+  const hasCompleted = todos.some(todo => todo.completed);
+
+  const handleFilterChange = (newFilter: Filter) => {
+    setFilter(newFilter);
+  };
+
+  const handleClearCompleted = async () => {
+    const completedTodoIds = todos
+      .filter(todo => todo.completed)
+      .map(todo => todo.id);
+
+    Promise.allSettled(
+      completedTodoIds.map(async todoId => {
+        try {
+          await deleteTodo(todoId);
+
+          setTodos((currentTodos: Todo[]) =>
+            currentTodos.filter(todo => todo.id !== todoId),
+          );
+        } catch {
+          showError('Unable to delete a todo');
+        } finally {
+          setActiveTodoId(null);
+          focusInput(inputRef);
+        }
+      }),
+    );
+  };
+
+  return (
+    <footer className="todoapp__footer" data-cy="Footer">
+      <span className="todo-count" data-cy="TodosCounter">
+        {todos.filter(todo => !todo.completed).length} items left
+      </span>
+
+      <nav className="filter" data-cy="Filter">
+        {Object.values(Filter).map(filterValue => (
+          <a
+            key={filterValue}
+            href={`#/${filterValue}`}
+            className={classNames('filter__link', {
+              selected: filter === filterValue,
+            })}
+            data-cy={`FilterLink${filterValue.charAt(0).toUpperCase() + filterValue.slice(1)}`}
+            onClick={() => handleFilterChange(filterValue)}
+          >
+            {filterValue.charAt(0).toUpperCase() + filterValue.slice(1)}
+          </a>
+        ))}
+      </nav>
+
+      <button
+        type="button"
+        className="todoapp__clear-completed"
+        data-cy="ClearCompletedButton"
+        disabled={!hasCompleted}
+        onClick={handleClearCompleted}
+      >
+        Clear completed
+      </button>
+    </footer>
+  );
+};