Migracja z WordPress do Next.js — redirecty 301 i pozycje SEO

# Pobierz wszystkie zaindeksowane URL-e z Google Search Console
# GSC → Performance → Pages → Eksportuj do CSV
 
# Lub użyj screaming frog / sitemap
curl -s https://twoj-wordpress.pl/sitemap_index.xml

# WP-CLI — eksport do JSON (najlepsze do programowej migracji)
wp post list --post_type=post --format=json --fields=ID,post_title,post_name,post_content,post_date,post_excerpt > posts.json
wp post list --post_type=page --format=json --fields=ID,post_title,post_name,post_content > pages.json
 
# Eksport mediów
wp media list --format=json --fields=ID,guid,post_title,alt_text > media.json

// scripts/export-wordpress.ts
async function exportPosts() {
  let page = 1
  let allPosts: any[] = []
 
  while (true) {
    const res = await fetch(
      `https://twoj-wordpress.pl/wp-json/wp/v2/posts?per_page=100&page=${page}&_embed`,
    )
 
    if (!res.ok) break
 
    const posts = await res.json()
    if (posts.length === 0) break
 
    allPosts = [...allPosts, ...posts]
    page++
  }
 
  // Zapisz do pliku
  const fs = require('fs')
  fs.writeFileSync('wordpress-posts.json', JSON.stringify(allPosts, null, 2))
  console.log(`Wyeksportowano ${allPosts.length} postów`)
}

// scripts/convert-to-mdx.ts
import TurndownService from 'turndown'
import fs from 'fs'
import path from 'path'
 
const turndown = new TurndownService({
  headingStyle: 'atx',
  codeBlockStyle: 'fenced',
})
 
interface WPPost {
  title: { rendered: string }
  slug: string
  content: { rendered: string }
  excerpt: { rendered: string }
  date: string
  _embedded?: {
    'wp:featuredmedia'?: [{ source_url: string; alt_text: string }]
    'wp:term'?: [{ name: string }[]]
  }
}
 
function convertPost(post: WPPost): string {
  const tags = post._embedded?.['wp:term']?.[0]?.map((t) => t.name) || []
  const image = post._embedded?.['wp:featuredmedia']?.[0]?.source_url || ''
  const excerpt = post.excerpt.rendered.replace(/<[^>]*>/g, '').trim()
 
  // Konwersja HTML → Markdown
  const content = turndown.turndown(post.content.rendered)
 
  // Frontmatter MDX
  const frontmatter = `---
title: '${post.title.rendered.replace(/'/g, "\\'")}'
description: '${excerpt.slice(0, 160)}'
datePublished: '${post.date}'
author: 'Maciej Sala'
tags: [${tags.map((t) => `'${t}'`).join(', ')}]
---`
 
  return `${frontmatter}\n\n${content}`
}
 
// Konwertuj wszystkie posty
const posts: WPPost[] = JSON.parse(
  fs.readFileSync('wordpress-posts.json', 'utf-8'),
)
 
for (const post of posts) {
  const mdx = convertPost(post)
  const filePath = path.join('content/blog', `${post.slug}.mdx`)
  fs.writeFileSync(filePath, mdx)
}
 
console.log(`Skonwertowano ${posts.length} postów do MDX`)

// Typowe mapowanie WordPress → Next.js
const urlMap: Record<string, string | null> = {
  // WordPress domyślne
  '/wp-admin': null, // Nie przekierowuj
  '/wp-login.php': null, // Nie przekierowuj
  '/feed': '/blog/rss.xml', // RSS
 
  // Struktury permalink
  // WordPress: /2024/01/moj-post/ → Next.js: /blog/moj-post
  // WordPress: /kategoria/nazwa/ → Next.js: /blog/tag/nazwa
}

// next.config.ts
const nextConfig = {
  async redirects() {
    return [
      // Redirect WordPress permalink structure
      {
        source: '/:year(\\d{4})/:month(\\d{2})/:slug',
        destination: '/blog/:slug',
        permanent: true, // 301
      },
      // Redirect category pages
      {
        source: '/wp-category/:slug',
        destination: '/blog/tag/:slug',
        permanent: true,
      },
      // Redirect tag pages
      {
        source: '/tag/:slug',
        destination: '/blog/tag/:slug',
        permanent: true,
      },
      // Redirect feed
      {
        source: '/feed',
        destination: '/blog/rss.xml',
        permanent: true,
      },
      // WordPress artifacts
      {
        source: '/wp-content/:path*',
        destination: '/media/:path*', // Jeśli przeniosłeś media
        permanent: true,
      },
      // Konkretne strony z innym URL
      {
        source: '/o-nas',
        destination: '/o-mnie',
        permanent: true,
      },
    ]
  },
}

// src/seo/redirects.ts
export const redirects = [
  { source: '/2024/01/stary-slug/', destination: '/blog/nowy-slug/' },
  { source: '/uslugi/dawna-nazwa/', destination: '/uslugi/next-js/' },
  // ...wygenerowane z arkusza mapowania
] as const

// middleware.ts
import { NextResponse, type NextRequest } from 'next/server'
import { redirects } from './src/seo/redirects'
 
const map = new Map(redirects.map((r) => [r.source, r.destination]))
 
export function middleware(request: NextRequest) {
  const target = map.get(request.nextUrl.pathname)
  if (target) {
    return NextResponse.redirect(new URL(target, request.url), 301)
  }
  return NextResponse.next()
}

// scripts/download-images.ts
import fs from 'fs'
import path from 'path'
 
const media: { guid: string; post_title: string }[] = JSON.parse(
  fs.readFileSync('media.json', 'utf-8'),
)
 
async function downloadImage(url: string, filename: string) {
  const res = await fetch(url)
  const buffer = await res.arrayBuffer()
  const outputPath = path.join('public/images/blog', filename)
  fs.writeFileSync(outputPath, Buffer.from(buffer))
}
 
async function migrateImages() {
  for (const item of media) {
    const url = item.guid
    const filename = path.basename(new URL(url).pathname)
 
    try {
      await downloadImage(url, filename)
      console.log(`✓ ${filename}`)
    } catch {
      console.error(`✗ ${filename}`)
    }
  }
}

# Zamień stare URL-e mediów na lokalne ścieżki
sed -i 's|https://twoj-wordpress.pl/wp-content/uploads/|/images/blog/|g' content/blog/*.mdx