WordPressのREST APIで引っ張った全postデータをいい感じに加工してファイルとして出力する

convertWp2Html.js

const fs = require("fs")
const dayjs = require("dayjs")

const json = require("./wpdata.json")

console.log(`ファイル数：${json.length}`)

json.forEach((post, index) => {
  const date = `${post.date}+09:00`
  const modified = `${post.modified}+09:00`
  const slug = post.slug
  const status = post.status
  const title = post.title.rendered
  const excerpt = post.excerpt.rendered
  const content = post.content.rendered

  const filename = getFileName(date, title)
  const frontmatter = createFrontmatter({ title, excerpt, slug, date, modified, status })
  const fileData = frontmatter + "\n\n" + content

  fs.writeFile(`./posts/${filename}`, fileData, err => {
    if (err) {
      console.log("エラーが発生しました。" + err)
      throw err
    } else {
      console.log(`Success file creation [${index + 1}]: ${filename}`)
    }
  })
})

function getFileName(date, title) {
  const prefix = dayjs(date).format("YYYY-MM-DD")
  return `${prefix}-${title}.html`.replace(/\//g, "-")
}

function createFrontmatter(originalData) {
  const result = ["<!-- @frontmatter"]
  const keys = ["title", "excerpt", "slug", "date", "modified", "category", "status"]
  const data = keys.map(key => {
    if (key === "excerpt") {
      const isExcerpt = originalData[key].includes("[&hellip;]")
      return `description: "${isExcerpt ? "" : originalData[key]}"`
    }
    if (key === "category") {
      return `category: [""]`
    }
    if (key === "title" || key === "slug" || key === "status") {
      return `${key}: "${originalData[key]}"`
    }
    return `${key}: ${originalData[key]}`
  })
  return result.concat(data, ["-->"]).join("\n")
}