Fix issue #57: feat: Add helpful code comments to improve readability

This PR addresses the changes requested in issue #57

Thank you for adding those files to the chat. I'll now propose changes to add helpful comments to both files, making the main functionality easier to understand. Let's start with src/main.tsx, then move on to src/App.tsx.

src/main.tsx

<<<<<<< SEARCH
import { StrictMode } from 'react'
import { createRoot } from 'react-dom/client'
import './index.css'
import App from './App.tsx'

createRoot(document.getElementById('root')!).render(
  <StrictMode>
    <App />
  </StrictMode>,
)
=======
// Import necessary dependencies
import { StrictMode } from 'react'
import { createRoot } from 'react-dom/client'
import './index.css'
import App from './App.tsx'

// Create a root for the React app and render it
// The '!' is a non-null assertion operator, telling TypeScript that we're sure 'root' exists
createRoot(document.getElementById('root')!).render(
  // Wrap the App component in StrictMode for additional checks and warnings
  <StrictMode>
    <App />
  </StrictMode>,
)
>>>>>>> REPLACE

Now, let's add comments to src/App.tsx. Due to its size, we'll break it into several SEARCH/REPLACE blocks:

src/App.tsx

<<<<<<< SEARCH
import React, { useState, useEffect, useRef, useCallback } from 'react'
import { DndProvider, useDrag, useDrop } from 'react-dnd'
import { HTML5Backend } from 'react-dnd-html5-backend'
import './App.css'
=======
// Import necessary dependencies from React and other libraries
import React, { useState, useEffect, useRef, useCallback } from 'react'
import { DndProvider, useDrag, useDrop } from 'react-dnd'
import { HTML5Backend } from 'react-dnd-html5-backend'
import './App.css'

// Define interfaces and types
>>>>>>> REPLACE

src/App.tsx

<<<<<<< SEARCH
interface Todo {
  id: string;
  text: string;
  completed: boolean;
  dueDate: Date;
}

type FilterStatus = 'all' | 'active' | 'completed';

interface DraggableItemProps {
  id: string;
  index: number;
  moveItem: (dragIndex: number, hoverIndex: number, fromGroup: string, toGroup: string) => void;
  children: React.ReactNode;
  group: 'today' | 'tomorrow' | 'upcoming';
}
=======
// Define the structure of a Todo item
interface Todo {
  id: string;
  text: string;
  completed: boolean;
  dueDate: Date;
}

// Define possible filter statuses
type FilterStatus = 'all' | 'active' | 'completed';

// Define props for the DraggableItem component
interface DraggableItemProps {
  id: string;
  index: number;
  moveItem: (dragIndex: number, hoverIndex: number, fromGroup: string, toGroup: string) => void;
  children: React.ReactNode;
  group: 'today' | 'tomorrow' | 'upcoming';
}

// DraggableItem component for drag and drop functionality
>>>>>>> REPLACE

src/App.tsx

<<<<<<< SEARCH
const DraggableItem: React.FC<DraggableItemProps> = ({ id, index, moveItem, children, group }) => {
  const ref = useRef<HTMLLIElement>(null)

  const [{ isOver }, drop] = useDrop({
    accept: ['TODO_TODAY', 'TODO_TOMORROW', 'TODO_UPCOMING'],
    hover(item: { id: string; index: number; group: string }, monitor) {
      if (!ref.current) {
        return
      }
      const dragIndex = item.index
      const hoverIndex = index
      const fromGroup = item.group
      const toGroup = group

      if (dragIndex === hoverIndex && fromGroup === toGroup) {
        return
      }

      const hoverBoundingRect = ref.current.getBoundingClientRect()
      const hoverMiddleY = (hoverBoundingRect.bottom - hoverBoundingRect.top) / 2
      const clientOffset = monitor.getClientOffset()
      const hoverClientY = clientOffset!.y - hoverBoundingRect.top

      if (dragIndex < hoverIndex && hoverClientY < hoverMiddleY) {
        return
      }
      if (dragIndex > hoverIndex && hoverClientY > hoverMiddleY) {
        return
      }

      moveItem(dragIndex, hoverIndex, fromGroup, toGroup)
      item.index = hoverIndex
      item.group = toGroup
    },
    collect: (monitor) => ({
      isOver: monitor.isOver(),
    }),
  })

  const [{ isDragging }, drag, preview] = useDrag({
    type: `TODO_${group.toUpperCase()}`,
    item: () => ({ id, index, group }),
    collect: (monitor) => ({
      isDragging: monitor.isDragging(),
    }),
  })

  drag(drop(ref))

  return (
    <li ref={preview} style={{ opacity: isDragging ? 0.5 : 1 }}>
      <div ref={ref} className={`drag-handle ${isOver ? 'drag-over' : ''}`}>
        ☰
        {isOver && <div className="drop-placeholder" />}
      </div>
      {children}
    </li>
  )
}
=======
const DraggableItem: React.FC<DraggableItemProps> = ({ id, index, moveItem, children, group }) => {
  const ref = useRef<HTMLLIElement>(null)

  // Set up drop functionality
  const [{ isOver }, drop] = useDrop({
    accept: ['TODO_TODAY', 'TODO_TOMORROW', 'TODO_UPCOMING'],
    hover(item: { id: string; index: number; group: string }, monitor) {
      if (!ref.current) {
        return
      }
      const dragIndex = item.index
      const hoverIndex = index
      const fromGroup = item.group
      const toGroup = group

      // Don't replace items with themselves
      if (dragIndex === hoverIndex && fromGroup === toGroup) {
        return
      }

      // Determine rectangle on screen
      const hoverBoundingRect = ref.current.getBoundingClientRect()
      // Get vertical middle
      const hoverMiddleY = (hoverBoundingRect.bottom - hoverBoundingRect.top) / 2
      // Determine mouse position
      const clientOffset = monitor.getClientOffset()
      // Get pixels to the top
      const hoverClientY = clientOffset!.y - hoverBoundingRect.top

      // Only perform the move when the mouse has crossed half of the items height
      // When dragging downwards, only move when the cursor is below 50%
      // When dragging upwards, only move when the cursor is above 50%
      if (dragIndex < hoverIndex && hoverClientY < hoverMiddleY) {
        return
      }
      if (dragIndex > hoverIndex && hoverClientY > hoverMiddleY) {
        return
      }

      // Time to actually perform the action
      moveItem(dragIndex, hoverIndex, fromGroup, toGroup)
      // Note: we're mutating the monitor item here!
      // Generally it's better to avoid mutations,
      // but it's good here for the sake of performance
      // to avoid expensive index searches.
      item.index = hoverIndex
      item.group = toGroup
    },
    collect: (monitor) => ({
      isOver: monitor.isOver(),
    }),
  })

  // Set up drag functionality
  const [{ isDragging }, drag, preview] = useDrag({
    type: `TODO_${group.toUpperCase()}`,
    item: () => ({ id, index, group }),
    collect: (monitor) => ({
      isDragging: monitor.isDragging(),
    }),
  })

  // Initialize drag and drop on the same element
  drag(drop(ref))

  return (
    <li ref={preview} style={{ opacity: isDragging ? 0.5 : 1 }}>
      <div ref={ref} className={`drag-handle ${isOver ? 'drag-over' : ''}`}>
        ☰
        {isOver && <div className="drop-placeholder" />}
      </div>
      {children}
    </li>
  )
}
>>>>>>> REPLACE

src/App.tsx

<<<<<<< SEARCH
function App() {
  const loadTodosFromLocalStorage = (): Todo[] => {
    const storedTodos = localStorage.getItem('todos')
    if (storedTodos) {
      return JSON.parse(storedTodos).map((todo: Todo) => ({
        ...todo,
        id: todo.id.toString(),
        dueDate: new Date(todo.dueDate)
      }))
    }
    return []
  }

  const [todos, setTodos] = useState<Todo[]>(loadTodosFromLocalStorage())
  const [newTodo, setNewTodo] = useState('')
  const [dueDate, setDueDate] = useState<string>(new Date().toISOString().split('T')[0])
  const [darkMode, setDarkMode] = useState<boolean>(false)
  const [filterStatus, setFilterStatus] = useState<FilterStatus>('all')
  const [editingTodo, setEditingTodo] = useState<Todo | null>(null)
  const [completedTodoId, setCompletedTodoId] = useState<string | null>(null)

  const getFilterButtonClass = (status: FilterStatus) => {
    return `filter-button ${filterStatus === status ? 'active' : ''}`
  }
  const fileInputRef = useRef<HTMLInputElement>(null)
  const completionTimeoutRef = useRef<number | null>(null)
=======
function App() {
  // Function to load todos from localStorage
  const loadTodosFromLocalStorage = (): Todo[] => {
    const storedTodos = localStorage.getItem('todos')
    if (storedTodos) {
      return JSON.parse(storedTodos).map((todo: Todo) => ({
        ...todo,
        id: todo.id.toString(),
        dueDate: new Date(todo.dueDate)
      }))
    }
    return []
  }

  // State variables
  const [todos, setTodos] = useState<Todo[]>(loadTodosFromLocalStorage())
  const [newTodo, setNewTodo] = useState('')
  const [dueDate, setDueDate] = useState<string>(new Date().toISOString().split('T')[0])
  const [darkMode, setDarkMode] = useState<boolean>(false)
  const [filterStatus, setFilterStatus] = useState<FilterStatus>('all')
  const [editingTodo, setEditingTodo] = useState<Todo | null>(null)
  const [completedTodoId, setCompletedTodoId] = useState<string | null>(null)

  // Helper function to get the class for filter buttons
  const getFilterButtonClass = (status: FilterStatus) => {
    return `filter-button ${filterStatus === status ? 'active' : ''}`
  }

  // Refs
  const fileInputRef = useRef<HTMLInputElement>(null)
  const completionTimeoutRef = useRef<number | null>(null)
>>>>>>> REPLACE

I'll continue with more SEARCH/REPLACE blocks for the rest of the App.tsx file in subsequent messages, as there's a character limit for each message.

larryhudson / vite-todo-list

Fix issue #57: feat: Add helpful code comments to improve readability #58