Add task solution

src/App.tsx

@@ -1,26 +1,293 @@
-/* eslint-disable max-len */
-/* eslint-disable jsx-a11y/control-has-associated-label */
-import React from 'react';
-import { UserWarning } from './UserWarning';
-
-const USER_ID = 0;
+import React, { useCallback, useEffect, useMemo, useState } from 'react';
+import {
+  getTodos,
+  addTodo,
+  deleteTodo,
+  USER_ID,
+  toggleTodo,
+  updateTodoTitle,
+} from './api/todos';
+import { Todo } from './types/Todo';
+import { Header } from './components/Header';
+import { Footer } from './components/Footer';
+import { ErrorNotification } from './components/ErrorNotification';
+import { FilterStates, ErrorMessages } from './types/enums';
+import { TodoItem } from './components/TodoItem';
 
 export const App: React.FC = () => {
-  if (!USER_ID) {
-    return <UserWarning />;
-  }
+  const [todos, setTodos] = useState<Todo[]>([]);
+  const [error, setError] = useState<string | null>(null);
+  const [filter, setFilter] = useState(FilterStates.ALL);
+  const [tempTodo, setTempTodo] = useState<Todo | null>(null);
+  const [title, setTitle] = useState('');
+  const [isAdding, setIsAdding] = useState(false);
+  const [isEditingId, setIsEditingId] = useState<number | null>(null);
+
+  const handleAddTodo = useCallback(async (): Promise<void> => {
+    if (title.trim() === '') {
+      setError(ErrorMessages.NAMING_TODOS);
+      setTimeout(() => setError(null), 3000);
+
+      return;
+    }
+
+    setIsAdding(true);
+
+    try {
+      const newTempTodo: Todo = {
+        id: 0,
+        userId: USER_ID,
+        title,
+        completed: false,
+      };
+
+      setTempTodo(newTempTodo);
+
+      const newTodo = await addTodo(title.trim());
+
+      setTodos(prevTodos => [...prevTodos, newTodo]);
+      setTempTodo(null);
+      setTitle('');
+    } catch {
+      setError(ErrorMessages.ADDING_TODOS);
+      setTempTodo(null);
+      setTimeout(() => setError(null), 3000);
+    } finally {
+      setIsAdding(false);
+      setTimeout(() => {
+        const input =
+          document.querySelector<HTMLInputElement>('.todoapp__new-todo');
+
+        input?.focus();
+      }, 100);
+    }
+  }, [title]);
+
+  const handleDeleteTodo = useCallback(
+    async (todoId: number): Promise<void> => {
+      try {
+        await deleteTodo(todoId);
+        setTodos(prevTodos => prevTodos.filter(todo => todo.id !== todoId));
+      } catch {
+        setError(ErrorMessages.DELETING_TODOS);
+        setTimeout(() => setError(null), 3000);
+      } finally {
+        const input =
+          document.querySelector<HTMLInputElement>('.todoapp__new-todo');
+
+        input?.focus();
+      }
+    },
+    [],
+  );
+
+  const handleToggleTodoStatus = useCallback(
+    async (todoId: number, completed: boolean): Promise<void> => {
+      try {
+        await toggleTodo(todoId, completed);
+        setTodos(prevTodos =>
+          prevTodos.map(todo =>
+            todo.id === todoId ? { ...todo, completed } : todo,
+          ),
+        );
+      } catch {
+        setError(ErrorMessages.UPDATE_TODOS);
+        setTimeout(() => setError(null), 3000);
+      }
+    },
+    [],
+  );
+
+  const handleUpdateTodoTitle = useCallback(
+    async (todoId: number, newTitle: string): Promise<void> => {
+      const existingTodo = todos.find(todo => todo.id === todoId);
+
+      if (!existingTodo) {
+        return;
+      }
+
+      if (newTitle.trim() === existingTodo.title) {
+        setIsEditingId(null);
+
+        return;
+      }
+
+      if (newTitle.trim() === '') {
+        try {
+          await deleteTodo(todoId);
+          setTodos(prevTodos => prevTodos.filter(todo => todo.id !== todoId));
+          setIsEditingId(null);
+        } catch {
+          setError(ErrorMessages.DELETING_TODOS);
+          setTimeout(() => setError(null), 3000);
+        }
+
+        return;
+      }
+
+      try {
+        await updateTodoTitle(todoId, newTitle);
+        setTodos(prevTodos =>
+          prevTodos.map(todo =>
+            todo.id === todoId ? { ...todo, title: newTitle } : todo,
+          ),
+        );
+        setIsEditingId(null);
+      } catch {
+        setError(ErrorMessages.UPDATE_TODOS);
+        setTimeout(() => setError(null), 3000);
+      }
+    },
+    [todos],
+  );
+
+  const handleDoubleClick = useCallback((todoId: number) => {
+    setIsEditingId(todoId);
+  }, []);
+
+  const filteredTodos = useMemo(() => {
+    return todos.filter(todo => {
+      switch (filter) {
+        case FilterStates.ACTIVE:
+          return !todo.completed;
+        case FilterStates.COMPLETED:
+          return todo.completed;
+        default:
+          return true;
+      }
+    });
+  }, [todos, filter]);
+
+  const hasTodos = todos.length > 0;
+  const allCompleted = todos.length > 0 && todos.every(todo => todo.completed);
+
+  const handleToggleAllTodos = useCallback(async () => {
+    const newCompletedState = !allCompleted;
+
+    try {
+      const updatePromises = todos.map(async todo => {
+        if (todo.completed !== newCompletedState) {
+          await toggleTodo(todo.id, newCompletedState);
+
+          return { ...todo, completed: newCompletedState };
+        }
+
+        return todo;
+      });
+
+      const updatedTodos = await Promise.all(updatePromises);
+
+      setTodos(updatedTodos);
+    } catch {
+      setError(ErrorMessages.UPDATE_TODOS);
+      setTimeout(() => setError(null), 3000);
+    }
+  }, [todos, allCompleted]);
+
+  const handleClearCompleted = useCallback(async (): Promise<void> => {
+    const completedTodos = todos.filter(todo => todo.completed);
+
+    try {
+      const deletionResults = await Promise.allSettled(
+        completedTodos.map(todo => handleDeleteTodo(todo.id)),
+      );
+
+      const hasErrors = deletionResults.some(
+        result => result.status === 'rejected',
+      );
+
+      if (hasErrors) {
+        setError('Unable to delete some completed todos');
+        setTimeout(() => {
+          setError(null);
+        }, 3000);
+      }
+    } catch {
+      setError('Unable to clear completed todos');
+      setTimeout(() => {
+        setError(null);
+      }, 3000);
+    }
+  }, [handleDeleteTodo, todos]);
+
+  const handleHideError = () => {
+    setError(null);
+  };
+
+  const handleCancelEdit = (event: React.KeyboardEvent) => {
+    if (event.key === 'Escape') {
+      setIsEditingId(null);
+    }
+  };
+
+  useEffect(() => {
+    const fetchTodos = async () => {
+      try {
+        const data = await getTodos();
+
+        setTodos(data);
+      } catch (err) {
+        setError(ErrorMessages.LOAD_TODOS);
+        const timer = setTimeout(() => setError(null), 3000);
+
+        return () => clearTimeout(timer);
+      }
+    };
+
+    fetchTodos();
+  }, []);
 
   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
+          allCompleted={allCompleted}
+          onAddTodo={handleAddTodo}
+          onToggleAllTodos={handleToggleAllTodos}
+          title={title}
+          setTitle={setTitle}
+          todoCount={todos.length}
+          isAdding={isAdding}
+          setError={setError}
+        />
+
+        {hasTodos &&
+          filteredTodos.map(todo => (
+            <TodoItem
+              key={todo.id}
+              todo={todo}
+              onDelete={handleDeleteTodo}
+              onToggleStatus={handleToggleTodoStatus}
+              onUpdateTitle={handleUpdateTodoTitle}
+              setError={setError}
+              isEditing={isEditingId === todo.id}
+              onDoubleClick={() => handleDoubleClick(todo.id)}
+              onCancelEdit={event => handleCancelEdit(event)}
+            />
+          ))}
+
+        {tempTodo && (
+          <TodoItem
+            todo={tempTodo}
+            onDelete={handleDeleteTodo}
+            onToggleStatus={handleToggleTodoStatus}
+            onUpdateTitle={handleUpdateTodoTitle}
+            setError={setError}
+            isAdding={isAdding}
+          />
+        )}
+
+        {hasTodos && (
+          <Footer
+            todos={todos}
+            filter={filter}
+            setFilter={setFilter}
+            onClearCompleted={handleClearCompleted}
+          />
+        )}
+      </div>
+      <ErrorNotification error={error} onHideError={handleHideError} />
+    </div>
   );
 };

src/api/todos.ts

@@ -0,0 +1,28 @@
+import { Todo } from '../types/Todo';
+import { client } from '../utils/fetchClient';
+
+export const USER_ID = 1625;
+
+export const getTodos = () => {
+  return client.get<Todo[]>(`/todos?userId=${USER_ID}`);
+};
+
+export const addTodo = (title: string) => {
+  return client.post<Todo>(`/todos`, {
+    title,
+    userId: USER_ID,
+    completed: false,
+  });
+};
+
+export const deleteTodo = (todoId: number) => {
+  return client.delete(`/todos/${todoId}`);
+};
+
+export const toggleTodo = (todoId: number, completed: boolean) => {
+  return client.patch(`/todos/${todoId}`, { completed });
+};
+
+export const updateTodoTitle = (todoId: number, title: string) => {
+  return client.patch(`/todos/${todoId}`, { title });
+};

src/components/ErrorNotification.tsx

@@ -0,0 +1,35 @@
+import React from 'react';
+import classNames from 'classnames';
+
+interface ErrorNotificationProps {
+  error: string | null;
+  onHideError: () => void;
+}
+
+export const ErrorNotification: React.FC<ErrorNotificationProps> = ({
+  error,
+  onHideError,
+}) => {
+  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={onHideError}
+      />
+      {error}
+    </div>
+  );
+};