add task solution

src/App.tsx

@@ -1,26 +1,310 @@
-/* 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, { useEffect, useMemo, useRef, useState } from 'react';
 import { UserWarning } from './UserWarning';
+import {
+  deleteTodo,
+  getTodos,
+  patchTodo,
+  postTodo,
+  USER_ID,
+} from './api/todos';
+import { Todo } from './types/Todo';
+import { Header } from './components/Header';
+import { TodoList } from './components/TodoList';
+import { Footer } from './components/Footer';
+import { Error } from './components/Error';
 
-const USER_ID = 0;
+export enum Filter {
+  all = 'All',
+  active = 'Active',
+  completed = 'Completed',
+}
 
 export const App: React.FC = () => {
+  // #region variables
+
+  const [value, setValue] = useState('');
+  const [editedValue, setEditedValue] = useState('');
+  const [todos, setTodos] = useState<Todo[]>([]);
+  const [isInputDisabled, setIsInputDisabled] = useState(false);
+  const [filter, setFilter] = useState(Filter.all);
+  const [error, setError] = useState('');
+  const [allCompleted, setAllCompleted] = useState(false);
+  const [editedInputById, setEditedInputById] = useState(-1);
+  const [key, setKey] = useState('');
+
+  const filteredTodos = useMemo(() => {
+    return todos.filter(todo => {
+      switch (filter) {
+        case Filter.active:
+          return !todo.completed;
+        case Filter.completed:
+          return todo.completed;
+        default:
+          return todo;
+      }
+    });
+  }, [filter, todos]);
+
+  const completedTodos = todos.filter(todo => todo.completed);
+  const inputRef = useRef<HTMLInputElement | null>(null);
+  const editedInputRef = useRef<HTMLInputElement | null>(null);
+  const nrOfActiveTodos = todos.filter(todo => !todo.completed).length;
+
+  // #endregion
+  // #region variables for loader
+
+  const [tempTodo, setTempTodo] = useState<Todo | null>(null);
+  const [idsOfTodosWithLoader, setIdsOfTodosWithLoader] = useState<number[]>(
+    [],
+  );
+
+  // #endregion
+  // #region useEffects
+
+  useEffect(() => {
+    getTodos()
+      .then(setTodos)
+      .catch(() => {
+        setError('Unable to load todos');
+        setTimeout(() => setError(''), 3000);
+      });
+  }, []);
+
+  useEffect(() => {
+    setTimeout(() => {
+      inputRef.current?.focus();
+    }, 100);
+  }, [isInputDisabled]);
+
+  useEffect(() => {
+    const isAllCompleted =
+      completedTodos.length > 0 && completedTodos.length === todos.length;
+
+    if (isAllCompleted) {
+      setAllCompleted(true);
+    } else if (allCompleted) {
+      setAllCompleted(false);
+    }
+  }, [allCompleted, completedTodos, todos.length]);
+
+  useEffect(() => {
+    if (editedInputRef.current && editedInputById) {
+      editedInputRef.current.focus();
+    }
+  }, [editedInputById]);
+
+  // #endregion
+  // #region functions
+
+  function onSubmit(event: React.FormEvent) {
+    event.preventDefault();
+    const trimmedValue = value.trim();
+
+    if (trimmedValue.length === 0) {
+      setError('Title should not be empty');
+
+      return;
+    }
+
+    const todo = {
+      id: 0,
+      userId: USER_ID,
+      title: trimmedValue,
+      completed: false,
+    };
+
+    setTempTodo(todo);
+    setIsInputDisabled(true);
+
+    postTodo(todo)
+      .then(_todo => {
+        setTodos(currentTodos => [...currentTodos, _todo]);
+        setValue('');
+      })
+      .catch(() => {
+        setError('Unable to add a todo');
+        setTimeout(() => setError(''), 3000);
+      })
+      .finally(() => {
+        setTempTodo(null);
+        setIsInputDisabled(false);
+      });
+  }
+
+  function deleteRequest(id: number) {
+    deleteTodo(id)
+      .then(() => {
+        setTimeout(() => {
+          setTodos(currentTodos =>
+            currentTodos.filter(_todo => _todo.id !== id),
+          );
+        }, 500);
+      })
+      .catch(() => {
+        setError('Unable to delete a todo');
+
+        setTimeout(() => setError(''), 3000);
+      })
+      .finally(() => {
+        setTimeout(() => {
+          setIdsOfTodosWithLoader(ids => ids.slice(1));
+          inputRef.current?.focus();
+        }, 500);
+      });
+  }
+
+  function onDelete(id: number) {
+    setIdsOfTodosWithLoader(ids => [...ids, id]);
+    deleteRequest(id);
+  }
+
+  function onDeleteSelected() {
+    todos.forEach(todo => {
+      if (todo.completed) {
+        const { id } = todo;
+
+        setIdsOfTodosWithLoader(ids => [...ids, id]);
+        deleteRequest(id);
+      }
+    });
+  }
+
+  function onSelect(id: number, todo: Todo) {
+    setIdsOfTodosWithLoader(ids => [...ids, id]);
+
+    patchTodo(id, todo)
+      .then(_todo => {
+        setTodos(currentTodos => {
+          return currentTodos.map(t => (_todo.id === t.id ? _todo : t));
+        });
+        if (editedInputById !== -1) {
+          setEditedInputById(-1);
+        }
+      })
+      .catch(() => {
+        setError('Unable to update a todo');
+        setTimeout(() => setError(''), 3000);
+      })
+      .finally(() => setIdsOfTodosWithLoader(ids => ids.slice(1)));
+  }
+
+  function toogleAll() {
+    const todosForToogle = todos.filter(todo =>
+      allCompleted ? todo.completed : !todo.completed,
+    );
+
+    setAllCompleted(!allCompleted);
+
+    todosForToogle.forEach(todo => {
+      const { id, completed } = todo;
+
+      onSelect(id, { ...todo, completed: !completed });
+    });
+  }
+
+  function setForm(id: number) {
+    const editedTodo = todos.find(todo => todo.id === id);
+
+    if (editedTodo) {
+      setEditedValue(editedTodo.title);
+    }
+
+    setEditedInputById(id);
+  }
+
+  function keyUp(event: React.KeyboardEvent) {
+    setKey(event.key);
+  }
+
+  function onSubmitChangedInput(event: React.FormEvent) {
+    event.preventDefault();
+    const editedTodo = todos.find(todo => todo.id === editedInputById) as Todo;
+    const trimmedValue = editedValue.trim();
+    const { title, id } = editedTodo;
+
+    if (title === trimmedValue) {
+      setEditedInputById(-1);
+
+      return;
+    }
+
+    if (trimmedValue.length === 0) {
+      setIdsOfTodosWithLoader(ids => [...ids, id]);
+      deleteRequest(id);
+
+      setTimeout(() => {
+        setEditedInputById(-1);
+      }, 500);
+
+      return;
+    }
+
+    editedTodo.title = trimmedValue;
+
+    onSelect(id, editedTodo);
+  }
+
+  // #endregion
+  // #region conditions
+
+  if (error) {
+    setTimeout(() => setError(''), 3000);
+  }
+
   if (!USER_ID) {
     return <UserWarning />;
   }
 
+  if (key === 'Escape') {
+    setEditedInputById(-1);
+    setKey('');
+  }
+
+  // #endregion
   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
+          value={value}
+          isInputDisabled={isInputDisabled}
+          allCompleted={allCompleted}
+          todos={todos}
+          inputRef={inputRef}
+          onSubmit={onSubmit}
+          setValue={setValue}
+          toogleAll={toogleAll}
+        />
+        <TodoList
+          tempTodo={tempTodo}
+          editedInputById={editedInputById}
+          editedValue={editedValue}
+          filteredTodos={filteredTodos}
+          idsOfTodosWithLoader={idsOfTodosWithLoader}
+          editedInputRef={editedInputRef}
+          onDelete={onDelete}
+          onSelect={onSelect}
+          setForm={setForm}
+          setEditedValue={setEditedValue}
+          onSubmitChangedInput={onSubmitChangedInput}
+          keyUp={keyUp}
+        />
+
+        {todos.length > 0 && (
+          <Footer
+            filter={filter}
+            nrOfActiveTodos={nrOfActiveTodos}
+            todos={todos}
+            setFilter={setFilter}
+            onDeleteSelected={onDeleteSelected}
+          />
+        )}
+      </div>
+
+      <Error error={error} />
+    </div>
   );
 };

src/api/todos.ts

@@ -0,0 +1,21 @@
+/* eslint-disable @typescript-eslint/no-explicit-any */
+import { Todo } from '../types/Todo';
+import { client } from '../utils/fetchClient';
+
+export const USER_ID = 1889;
+
+export const getTodos = () => {
+  return client.get<Todo[]>(`/todos?userId=${USER_ID}`);
+};
+
+export const postTodo = (data: any) => {
+  return client.post<Todo>(`/todos`, data);
+};
+
+export const deleteTodo = (id: number) => {
+  return client.delete(`/todos/${id}`);
+};
+
+export const patchTodo = (id: number, data: any) => {
+  return client.patch<Todo>(`/todos/${id}`, data);
+};

src/components/Error/Error.tsx

@@ -0,0 +1,35 @@
+import classNames from 'classnames';
+import React from 'react';
+
+interface Props {
+  error: string;
+}
+
+export const Error: React.FC<Props> = React.memo(({ error }) => {
+  return (
+    <div
+      data-cy="ErrorNotification"
+      className={classNames(
+        'notification',
+        'is-danger',
+        'is-light',
+        'has-text-weight-normal',
+        { hidden: error.length === 0 },
+      )}
+    >
+      <button data-cy="HideErrorButton" type="button" className="delete" />
+      {/* Unable to load todos
+        <br />
+        Title should not be empty
+        <br />
+        Unable to add a todo
+        <br />
+        Unable to delete a todo
+        <br />
+        Unable to update a todo */}
+      {error}
+    </div>
+  );
+});
+
+Error.displayName = 'Error';

src/components/Error/index.ts

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