Develop

README.md

@@ -47,4 +47,4 @@ Implement the ability to edit a todo title on double click:
 
 - Implement a solution following the [React task guideline](https://github.com/mate-academy/react_task-guideline#react-tasks-guideline).
 - Use the [React TypeScript cheat sheet](https://mate-academy.github.io/fe-program/js/extra/react-typescript).
-- Replace `<your_account>` with your Github username in the [DEMO LINK](https://<your_account>.github.io/react_todo-app-with-api/) and add it to the PR description.
+- Replace `<your_account>` with your Github username in the [DEMO LINK](https://wiolip.github.io/react_todo-app-with-api/) and add it to the PR description.

package.json

@@ -15,7 +15,7 @@
   },
   "devDependencies": {
     "@cypress/react18": "^2.0.1",
-    "@mate-academy/scripts": "^1.8.5",
+    "@mate-academy/scripts": "^2.1.3",
     "@mate-academy/students-ts-config": "*",
     "@mate-academy/stylelint-config": "*",
     "@types/node": "^20.14.10",

src/App.tsx

@@ -1,26 +1,282 @@
-/* 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,
+  useRef,
+  useState,
+} from 'react';
+import classNames from 'classnames';
 import { UserWarning } from './UserWarning';
-
-const USER_ID = 0;
+import {
+  getTodos,
+  createTodo,
+  deleteTodo,
+  USER_ID,
+  updateTodo,
+} from './api/todos';
+import { NewTodoForm } from './components/NewTodoForm';
+import { Todo } from './types/Todo';
+import { TodoList } from './components/TodoList';
+import { Filter, FILTERS } from './types/Filters';
+import { ErrorNotification } from './components/ErrorNotification';
+import { FilterComponent } from './components/FilterComponent';
 
 export const App: React.FC = () => {
+  const [todos, setTodos] = useState<Todo[]>([]);
+  const [tempTodo, setTempTodo] = useState<Todo | null>(null);
+  const [loadingIds, setLoadingIds] = useState<number[]>([]);
+  const [filter, setFilter] = useState<Filter>('all');
+  const [error, setError] = useState<string | null>(null);
+
+  const todoFieldRef = useRef<HTMLInputElement>(null);
+  const errorTimeoutRef = useRef<number | null>(null);
+
+  // Focus the input field
+  const focusField = useCallback(() => {
+    todoFieldRef.current?.focus();
+  }, []);
+
+  // Refocus input whenever temporary todo changes
+  useEffect(() => {
+    focusField();
+  }, [tempTodo, focusField]);
+
+  // Display error message and hide it automatically after 3 seconds
+  const showError = (message: string) => {
+    setError(message);
+
+    if (errorTimeoutRef.current) {
+      clearTimeout(errorTimeoutRef.current);
+    }
+
+    errorTimeoutRef.current = window.setTimeout(() => {
+      setError(null);
+    }, 3000);
+  };
+
+  // Load todos from API when the component mounts
+  useEffect(() => {
+    if (!USER_ID) {
+      return;
+    }
+
+    getTodos()
+      .then(setTodos)
+      .catch(() => showError('Unable to load todos'));
+
+    // Cleanup timeout on unmount
+    return () => {
+      if (errorTimeoutRef.current) {
+        clearTimeout(errorTimeoutRef.current);
+      }
+    };
+  }, []);
+
+  // Memoized calculations for derived todo lists
+  const { activeTodos, completedTodos, filteredTodos } = useMemo(() => {
+    const active = todos.filter(t => !t.completed);
+    const completed = todos.filter(t => t.completed);
+    let filtered = todos;
+
+    if (filter === FILTERS.active) {
+      filtered = active;
+    }
+
+    if (filter === FILTERS.completed) {
+      filtered = completed;
+    }
+
+    return {
+      activeTodos: active,
+      completedTodos: completed,
+      filteredTodos: filtered,
+    };
+  }, [todos, filter]);
+
+  // Derived UI states
+  const isAllCompleted = todos.length > 0 && todos.every(t => t.completed);
+  const hasTodos = todos.length > 0 || tempTodo;
+
+  // Add new todo
+  const handleAdd = async (title: string): Promise<boolean> => {
+    const trimmedTitle = title.trim();
+
+    if (!trimmedTitle) {
+      showError('Title should not be empty');
+
+      return false;
+    }
+
+    // Optimistic UI: show temporary todo while request is in progress
+    setTempTodo({
+      id: 0,
+      userId: USER_ID,
+      title: trimmedTitle,
+      completed: false,
+    });
+
+    try {
+      const newTodo = await createTodo({ title: trimmedTitle });
+
+      setTodos(current => [...current, newTodo]);
+
+      return true;
+    } catch {
+      showError('Unable to add a todo');
+
+      return false;
+    } finally {
+      setTempTodo(null);
+    }
+  };
+
+  // Delete a todo
+  const handleDelete = async (id: number) => {
+    setLoadingIds(prev => [...prev, id]);
+
+    try {
+      await deleteTodo(id);
+      setTodos(prev => prev.filter(t => t.id !== id));
+      focusField();
+    } catch {
+      showError('Unable to delete a todo');
+    } finally {
+      setLoadingIds(prev => prev.filter(lid => lid !== id));
+    }
+  };
+
+  // toggle todo
+  const handleToggle = async (todo: Todo) => {
+    setLoadingIds(prev => [...prev, todo.id]);
+
+    try {
+      const updated = await updateTodo(todo.id, {
+        completed: !todo.completed,
+      });
+
+      setTodos(prev => prev.map(t => (t.id === todo.id ? updated : t)));
+    } catch {
+      showError('Unable to update a todo');
+      throw new Error('Update failed');
+    } finally {
+      setLoadingIds(prev => prev.filter(id => id !== todo.id));
+    }
+  };
+
+  const handleToggleAll = async () => {
+    const newStatus = !isAllCompleted;
+    const todosToUpdate = todos.filter(todo => todo.completed !== newStatus);
+
+    try {
+      await Promise.all(todosToUpdate.map(todo => handleToggle(todo)));
+    } catch {}
+  };
+
+  const handleRename = async (
+    todo: Todo,
+    newTitle: string,
+  ): Promise<boolean> => {
+    const trimmed = newTitle.trim();
+
+    if (!trimmed) {
+      await handleDelete(todo.id);
+
+      return true;
+    }
+
+    if (trimmed === todo.title) {
+      return true;
+    }
+
+    setLoadingIds(prev => [...prev, todo.id]);
+
+    try {
+      const updated = await updateTodo(todo.id, {
+        title: trimmed,
+      });
+
+      setTodos(prev => prev.map(t => (t.id === todo.id ? updated : t)));
+
+      return true;
+    } catch {
+      showError('Unable to update a todo');
+
+      return false;
+    } finally {
+      setLoadingIds(prev => prev.filter(id => id !== todo.id));
+    }
+  };
+
+  // Remove all completed todos
+  const handleClearCompleted = async () => {
+    await Promise.allSettled(completedTodos.map(todo => handleDelete(todo.id)));
+    focusField();
+  };
+
+  // If USER_ID is missing, show warning instead of the app
   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 className="todoapp__header">
+          {hasTodos && (
+            <button
+              type="button"
+              className={classNames('todoapp__toggle-all', {
+                active: isAllCompleted,
+              })}
+              data-cy="ToggleAllButton"
+              onClick={handleToggleAll}
+            />
+          )}
+
+          <NewTodoForm
+            onAdd={handleAdd}
+            loading={!!tempTodo}
+            todoFieldRef={todoFieldRef}
+          />
+        </header>
+
+        {hasTodos && (
+          <TodoList
+            todos={filteredTodos}
+            tempTodo={tempTodo}
+            loadingIds={loadingIds}
+            onDelete={handleDelete}
+            onToggle={handleToggle}
+            onRename={handleRename}
+          />
+        )}
+
+        {/* Footer */}
+        {hasTodos && (
+          <footer className="todoapp__footer" data-cy="Footer">
+            <span className="todo-count" data-cy="TodosCounter">
+              {/*eslint-disable-next-line max-len*/}
+              {activeTodos.length} {activeTodos.length === 1 ? 'item' : 'items'}{' '}
+              left
+            </span>
+            <FilterComponent current={filter} onChange={setFilter} />
+            <button
+              type="button"
+              className="todoapp__clear-completed"
+              data-cy="ClearCompletedButton"
+              disabled={completedTodos.length === 0}
+              onClick={handleClearCompleted}
+            >
+              Clear completed
+            </button>
+          </footer>
+        )}
+      </div>
+      <ErrorNotification message={error} onClose={() => setError(null)} />
+    </div>
   );
 };

src/api/todos.ts

@@ -0,0 +1,27 @@
+import { Todo } from '../types/Todo';
+import { client } from '../utils/fetchClient';
+
+export const USER_ID = 3981;
+
+export const getTodos = () => {
+  return client.get<Todo[]>(`/todos?userId=${USER_ID}`);
+};
+
+// Add more methods here
+// Add new todo
+export const createTodo = ({ title }: { title: string }) => {
+  return client.post<Todo>('/todos', {
+    title,
+    userId: USER_ID,
+    completed: false,
+  });
+};
+
+// Delete todo by id
+export const deleteTodo = (id: number) => {
+  return client.delete(`/todos/${id}`);
+};
+
+export const updateTodo = (id: number, data: Partial<Todo>) => {
+  return client.patch<Todo>(`/todos/${id}`, data);
+};

src/components/ErrorNotification.tsx

@@ -0,0 +1,30 @@
+import classNames from 'classnames';
+import React from 'react';
+
+interface ErrorNotificationProps {
+  message: string | null;
+  onClose?: () => void;
+}
+
+export const ErrorNotification: React.FC<ErrorNotificationProps> = ({
+  message,
+  onClose,
+}) => {
+  return (
+    <div
+      data-cy="ErrorNotification"
+      className={classNames(
+        'notification is-danger is-light has-text-weight-normal',
+        { hidden: !message },
+      )}
+    >
+      <button
+        data-cy="HideErrorButton"
+        type="button"
+        className="delete"
+        onClick={onClose}
+      />
+      {message}
+    </div>
+  );
+};