This code defines a blog application (`BlogApp`), which is a...

June 28, 2025 at 01:06 AM

mport { useState, useRef, ChangeEvent } from 'react'
import { 
  ArrowLeft, 
  Edit, 
  Plus, 
  Trash, 
  Save, 
  Image as ImageIcon, 
  Upload, 
  Link as LinkIcon,
  Menu,
  Home,
  User,
  Star
} from 'lucide-react'
import { Card, CardContent, CardFooter, CardHeader, CardTitle } from "/components/ui/card"
import { Button } from "/components/ui/button"
import { Input } from "/components/ui/input"
import { Textarea } from "/components/ui/textarea"
import { Label } from "/components/ui/label"
import { Select, SelectContent, SelectItem, SelectTrigger, SelectValue } from "/components/ui/select"
import { motion, AnimatePresence } from 'framer-motion'

type BlogPost = {
  id: number
  title: string
  excerpt: string
  date: string
  coverImage: string
  content: string
  imageType: 'gradient' | 'upload' | 'unsplash'
  customImage?: string
  starred?: boolean
}

const initialPosts: BlogPost[] = [
  {
    id: 1,
    title: "Getting Started with React",
    excerpt: "Learn the fundamentals of React",
    date: "2023-05-15",
    coverImage: "react-cover",
    content: "React is a JavaScript library for building user interfaces...",
    imageType: 'gradient',
    starred: true
  },
  {
    id: 2,
    title: "Mastering Hooks in React",
    excerpt: "Understand how to use React Hooks",
    date: "2023-06-02",
    coverImage: "hooks-cover",
    content: "React Hooks, introduced in React 16.8...",
    imageType: 'gradient'
  },
  {
    id: 3,
    title: "Advanced State Management",
    excerpt: "Exploring Redux and Context API",
    date: "2023-06-10",
    coverImage: "responsive-cover",
    content: "State management is crucial for complex React applications...",
    imageType: 'gradient',
    starred: true
  }
]

const gradientOptions = {
  'react-cover': 'bg-gradient-to-r from-blue-500 to-purple-600',
  'hooks-cover': 'bg-gradient-to-r from-green-500 to-teal-600',
  'responsive-cover': 'bg-gradient-to-r from-orange-500 to-pink-600'
}

export default function BlogApp() {
  const [posts, setPosts] = useState<BlogPost[]>(initialPosts)
  const [selectedPost, setSelectedPost] = useState<BlogPost | null>(null)
  const [editPost, setEditPost] = useState<BlogPost | null>(null)
  const [view, setView] = useState<'list' | 'post' | 'editor' | 'about' | 'starred'>('list')
  const [transition, setTransition] = useState(false)
  const [sidebarOpen, setSidebarOpen] = useState(false)
  const fileInputRef = useRef<HTMLInputElement>(null)

  const handleFileUpload = (e: ChangeEvent<HTMLInputElement>) => {
    if (!e.target.files || !editPost) return
    const file = e.target.files[0]
    const reader = new FileReader()
    reader.onload = (event) => {
      if (event.target?.result) {
        setEditPost({
          ...editPost,
          coverImage: event.target.result as string,
          customImage: event.target.result as string,
          imageType: 'upload'
        })
      }
    }
    reader.readAsDataURL(file)
  }

  const toggleStar = (postId: number) => {
    setPosts(posts.map(post => 
      post.id === postId ? {...post, starred: !post.starred} : post
    ))
    if (selectedPost?.id === postId) {
      setSelectedPost({...selectedPost, starred: !selectedPost.starred})
    }
    if (editPost?.id === postId) {
      setEditPost({...editPost, starred: !editPost.starred})
    }
  }

  const handleViewPost = (post: BlogPost) => {
    setTransition(true)
    setTimeout(() => {
      setSelectedPost(post)
      setView('post')
      setTransition(false)
    }, 200)
  }

  const handleEditPost = (post: BlogPost) => {
    setTransition(true)
    setTimeout(() => {
      setEditPost({...post})
      setView('editor')
      setTransition(false)
    }, 200)
  }

  const handleCreatePost = () => {
    setTransition(true)
    setTimeout(() => {
      setEditPost({
        id: Date.now(),
        title: '',
        excerpt: '',
        date: new Date().toISOString().split('T')[0],
        coverImage: 'responsive-cover',
        content: '',
        imageType: 'gradient',
        starred: false
      })
      setView('editor')
      setTransition(false)
    }, 200)
  }

  const handleSavePost = () => {
    if (!editPost) return

    setTransition(true)
    setTimeout(() => {
      if (posts.some(post => post.id === editPost.id)) {
        setPosts(posts.map(post => post.id === editPost.id ? editPost : post))
      } else {
        setPosts([...posts, editPost])
      }

      setView('list')
      setEditPost(null)
      setTransition(false)
    }, 200)
  }

  const handleDeletePost = (id: number) => {
    setPosts(posts.filter(post => post.id !== id))
    if (selectedPost?.id === id) {
      setSelectedPost(null)
      setView('list')
    }
  }

  const handleInputChange = (e: React.ChangeEvent<HTMLInputElement | HTMLTextAreaElement>) => {
    if (!editPost) return
    setEditPost({
      ...editPost,
      [e.target.name]: e.target.value
    })
  }

  const handleImageTypeChange = (value: 'gradient' | 'upload' | 'unsplash') => {
    if (!editPost) return
    setEditPost({
      ...editPost,
      imageType: value,
      coverImage: value === 'gradient' ? 'responsive-cover' : ''
    })
  }

  const triggerFileInput = () => {
    fileInputRef.current?.click()
  }

  const starredPosts = posts.filter(post => post.starred)

This code defines a blog application (BlogApp), which is a React functional component. Here's what it does:

Imports:
- React hooks (useState, useRef) and ChangeEvent for React state management and event handling.
- Icons from lucide-react, UI components from a custom /components/ui library, and animation utilities from framer-motion.
Type Definitions:
- Defines a BlogPost type to structure blog post objects.
Initial Data:
- Declares initial blog post data (initialPosts) that includes default blog posts.
- Defines gradientOptions which maps cover image identifiers to gradient CSS classes.
State Management:
- posts: Stores the list of blog posts (initial state is initialPosts).
- selectedPost: Stores the current post being viewed.
- editPost: Stores the current post being edited or created.
- view: Tracks the current view (list, post, editor, etc.).
- transition: Boolean for managing view transitions.
- sidebarOpen: Boolean for toggling the sidebar.
- fileInputRef: A ref used to interact with a hidden file input (for uploading images).
Event Handlers and Logic:
- handleFileUpload: Handles uploading a custom image file for a blog post and reads the file as a base64 string.
- toggleStar: Toggles the "starred" status of a post by updating the starred property.
- handleViewPost: Displays the selected post in a detailed view after a small transition effect.
- handleEditPost: Opens a blog post in edit mode after a transition.
- handleCreatePost: Transitions to the editor with a new blank post.
- handleSavePost: Saves a new or edited blog post. Updates the post in the state if it already exists, or adds a new post to the list.
- handleDeletePost: Deletes a blog post by filtering it out of the list of posts. Updates the view if the deleted post was being viewed.
- handleInputChange: Universal input handler for text fields to update the editPost state dynamically based on the input name (title, excerpt, etc.).
- handleImageTypeChange: Updates the image type for the cover image (gradient, upload, unsplash).
- triggerFileInput: Programmatically triggers the file input for uploading an image.
Starred Posts:
- Filters the list of posts to create a starredPosts array, which contains only starred posts.
Return Statement:
- While the code snippet does not include the JSX/return portion, it appears this component manages the functionality for a blog application with features like post listing, viewing, creating, editing, deleting, marking posts as starred, and attaching custom cover images.

The component makes use of structured UI layers, custom animations, and state-based handling to provide an interactive blog management experience.

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