add task solution

src/App.tsx

@@ -1,26 +1,293 @@
-/* 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, { useState, useEffect, useRef } from 'react';
 import { UserWarning } from './UserWarning';
+import { USER_ID } from './api/todos';
+import * as todoService from './api/todos';
+import { Todo } from './types/Todo';
 
-const USER_ID = 0;
+import { Header } from './component/Header';
+import { TodoList } from './component/TodoList';
+import { Footer } from './component/Footer';
+import { ErrorNotification } from './component/Error';
+
+export enum ErrorText {
+  EmptyTitle = 'Title should not be empty',
+  AddFailed = 'Unable to add a todo',
+  UpdateFailed = 'Unable to update a todo',
+  DeleteFailed = 'Unable to delete a todo',
+  LoadFailed = 'Unable to load todos',
+}
+
+export enum Filter {
+  All = 'all',
+  Active = 'active',
+  Completed = 'completed',
+}
+
+export type FilterType = Filter.All | Filter.Active | Filter.Completed;
 
 export const App: React.FC = () => {
+  const [todos, setTodos] = useState<Todo[]>([]);
+  const [loadingTodoIds, setLoadingTodoIds] = useState<number[]>([]);
+  const [isLoadingTodos, setIsLoadingTodos] = useState(true);
+  const [error, setError] = useState('');
+  const [filter, setFilter] = useState<FilterType>(Filter.All);
+  const [newTitle, setNewTitle] = useState('');
+  const [tempTodo, setTempTodo] = useState<Todo | null>(null);
+  const [isAdding, setIsAdding] = useState(false);
+
+  const inputRef = useRef<HTMLInputElement>(null);
+
+  const startLoading = (id: number) => {
+    setLoadingTodoIds(prev => [...prev, id]);
+  };
+
+  const stopLoading = (id: number) => {
+    setLoadingTodoIds(prev => prev.filter(todoId => todoId !== id));
+  };
+
+  const handleAddTodo = async (e: React.FormEvent) => {
+    e.preventDefault();
+    const trimmed = newTitle.trim();
+
+    if (!trimmed) {
+      setError(ErrorText.EmptyTitle);
+      inputRef.current?.focus();
+
+      return;
+    }
+
+    const temp: Todo = {
+      id: 0,
+      userId: USER_ID,
+      title: trimmed,
+      completed: false,
+    };
+
+    setTempTodo(temp);
+    setIsAdding(true);
+
+    setError('');
+
+    try {
+      const newTodo = await todoService.postTodos({
+        title: trimmed,
+        userId: USER_ID,
+      });
+
+      setTodos(prev => [...prev, newTodo]);
+      setNewTitle('');
+      inputRef.current?.focus();
+    } catch {
+      setError(ErrorText.AddFailed);
+      inputRef.current?.focus();
+    } finally {
+      setIsAdding(false);
+      setTempTodo(null);
+    }
+  };
+
+  useEffect(() => {
+    if (!isAdding && tempTodo === null) {
+      inputRef.current?.focus();
+    }
+  }, [isAdding, tempTodo]);
+
+  const toggleTodo = async (todo: Todo) => {
+    startLoading(todo.id);
+    setError('');
+
+    try {
+      await todoService.patchTodo(todo.id, { completed: !todo.completed });
+      setTodos(prev =>
+        prev.map(existingTodo =>
+          existingTodo.id === todo.id
+            ? { ...existingTodo, completed: !existingTodo.completed }
+            : existingTodo,
+        ),
+      );
+    } catch {
+      setError(ErrorText.UpdateFailed);
+    } finally {
+      stopLoading(todo.id);
+    }
+  };
+
+  const toggleAll = async () => {
+    setError('');
+
+    const areAllCompleted = todos.every(todo => todo.completed);
+    const todosToUpdate = areAllCompleted
+      ? todos
+      : todos.filter(todo => !todo.completed);
+
+    await Promise.all(
+      todosToUpdate.map(async todo => {
+        startLoading(todo.id);
+
+        try {
+          await todoService.patchTodo(todo.id, {
+            completed: areAllCompleted ? false : true,
+          });
+          setTodos(prev =>
+            prev.map(t =>
+              t.id === todo.id
+                ? { ...t, completed: areAllCompleted ? false : true }
+                : t,
+            ),
+          );
+        } catch {
+          setError(ErrorText.UpdateFailed);
+        } finally {
+          stopLoading(todo.id);
+        }
+      }),
+    );
+  };
+
+  const handleUpdateTodo = async (edited: Todo): Promise<boolean> => {
+    startLoading(edited.id);
+    setError('');
+
+    try {
+      const updatedTodo = await todoService.patchTodo(edited.id, {
+        title: edited.title,
+      });
+
+      setTodos(prev =>
+        prev.map(t => (t.id === updatedTodo.id ? updatedTodo : t)),
+      );
+
+      return true;
+    } catch {
+      setError(ErrorText.UpdateFailed);
+
+      return false;
+    } finally {
+      stopLoading(edited.id);
+    }
+  };
+
+  const clearCompleted = async () => {
+    setError('');
+
+    const completed = todos.filter(t => t.completed);
+
+    await Promise.allSettled(
+      completed.map(async todo => {
+        startLoading(todo.id);
+
+        try {
+          await todoService.deleteTodo(todo.id);
+          setTodos(prev => prev.filter(t => t.id !== todo.id));
+        } catch {
+          setError(ErrorText.DeleteFailed);
+        } finally {
+          stopLoading(todo.id);
+        }
+      }),
+    );
+    inputRef.current?.focus();
+  };
+
+  const handleDeleteTodo = async (todoId: number) => {
+    startLoading(todoId);
+    setError('');
+    try {
+      await todoService.deleteTodo(todoId);
+      setTodos(prev => prev.filter(t => t.id !== todoId));
+      inputRef.current?.focus();
+
+      return true;
+    } catch {
+      setError(ErrorText.DeleteFailed);
+
+      return false;
+    } finally {
+      stopLoading(todoId);
+    }
+  };
+
+  const filterTodos = todos.filter(todo => {
+    if (filter === Filter.Active) {
+      return !todo.completed;
+    }
+
+    if (filter === Filter.Completed) {
+      return todo.completed;
+    }
+
+    return true;
+  });
+
+  useEffect(() => {
+    inputRef.current?.focus();
+    setIsLoadingTodos(true);
+    setError('');
+    todoService
+      .getTodos()
+      .then(fetchedTodos => {
+        setTodos(fetchedTodos);
+      })
+      .catch(() => {
+        setError(ErrorText.LoadFailed);
+      })
+      .finally(() => {
+        setIsLoadingTodos(false);
+      });
+  }, []);
+
+  useEffect(() => {
+    if (!error) {
+      return;
+    }
+
+    const timer = setTimeout(() => {
+      setError('');
+    }, 3000);
+
+    return () => clearTimeout(timer);
+  }, [error]);
+
   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}
+          toggleAll={toggleAll}
+          isLoadingTodos={isLoadingTodos}
+          newTitle={newTitle}
+          isAdding={isAdding}
+          inputRef={inputRef}
+          onSubmit={handleAddTodo}
+          onTitleChange={setNewTitle}
+        />
+
+        <TodoList
+          todos={filterTodos}
+          tempTodo={tempTodo}
+          loadingTodoIds={loadingTodoIds}
+          onToggledTodo={toggleTodo}
+          onDelete={handleDeleteTodo}
+          onUpdateTodo={handleUpdateTodo}
+        />
+
+        <Footer
+          todos={todos}
+          filter={filter}
+          onFilterChange={setFilter}
+          onClearCompleted={clearCompleted}
+        />
+      </div>
+
+    <ErrorNotification error={error} onErrorDeleat={() => setError('')} />
+    </div>
   );
 };

src/api/todos.ts

@@ -0,0 +1,24 @@
+import { Todo } from '../types/Todo';
+import { client } from '../ulits/fetchClient';
+
+export const USER_ID = 3968;
+
+export const getTodos = () => {
+  return client.get<Todo[]>(`/todos?userId=${USER_ID}`);
+};
+
+// Add more methods here
+export const postTodos = ({
+  title,
+  userId,
+}: Omit<Todo, 'id' | 'completed'>) => {
+  return client.post<Todo>(`/todos`, { title, userId, completed: false });
+};
+
+export const patchTodo = (id: number, data: Partial<Todo>) => {
+  return client.patch<Todo>(`/todos/${id}`, data);
+};
+
+export const deleteTodo = (id: number) => {
+  return client.delete<void>(`/todos/${id}`);
+};

src/component/Error.tsx

@@ -0,0 +1,31 @@
+import classNames from 'classnames';
+import React from 'react';
+type Props = {
+  error: string;
+  onErrorDeleat: () => void;
+};
+
+export const ErrorNotification: React.FC<Props> = ({
+  error,
+  onErrorDeleat,
+}) => {
+  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={() => onErrorDeleat()}
+        />
+        {error}
+      </div>
+    </>
+  );
+};