구글 Apps Script로 뉴스레터 만들기

function sendTechBlogNewsletter() {
  // ✅ RSS 피드 URL과 이름 정의
  const feedUrls = [
    { name: '네이버 D2', url: 'https://d2.naver.com/d2.atom' },
    { name: '마켓컬리', url: 'https://helloworld.kurly.com/feed.xml' },
    { name: '카카오엔터프라이즈', url: 'https://tech.kakaoenterprise.com/feed' },
    { name: '라인', url: 'https://engineering.linecorp.com/ko/feed/index.html' },
    { name: '토스', url: 'https://toss.tech/rss.xml' },
    { name: '뱅크샐러드', url: 'https://blog.banksalad.com/rss.xml' },
    { name: 'Hyperconnect', url: 'https://hyperconnect.github.io/feed.xml' },
    { name: '쏘카', url: 'https://tech.socarcorp.kr/feed' },
    { name: 'NHN Cloud', url: 'https://meetup.nhncloud.com/rss' },
    { name: '긱뉴스', url: 'https://feeds.feedburner.com/geeknews-feed', isGeekNews: true },
    { name: 'Reddit - webdev', url: 'https://www.reddit.com/r/webdev/.rss', translate: true },
    { name: 'Reddit - frontend', url: 'https://www.reddit.com/r/frontend/.rss', translate: true },
    { name: 'dev', url: 'https://dev.to/feed' },
    { name: 'Hacker News', url: 'https://hnrss.org/newest' },
  ]

  // ✅ 시간 설정
  const now = new Date() // 현재 시각
  const timezone = 'Asia/Seoul' // 한국 시간

  const today8am = new Date(Utilities.formatDate(now, timezone, 'yyyy-MM-dd') + 'T08:00:00+09:00')
  const yesterday8am = new Date(today8am.getTime() - 24 * 60 * 60 * 1000)

  let emailBody = `
    <div style="font-family: Arial, sans-serif; max-width: 600px; margin: auto; color: #333;">
      <h2 style="background-color: #4CAF50; color: white; padding: 10px; text-align: center; border-radius: 4px;">
        📰 오늘의 기술 블로그 - ${Utilities.formatDate(now, timezone, 'yyyy.MM.dd')}
      </h2>
      <p style="font-size: 14px; color: #555; text-align: center;">
        오늘 아침 8시 기준으로 모은 따끈따끈한 기술 소식이에요!
      </p>
      <hr style="border: none; border-top: 1px solid #eee;" />
  `

  feedUrls.forEach((feed) => {
    try {
      const response = UrlFetchApp.fetch(feed.url)
      const xml = response.getContentText()
      const xmlClean = xml.replace(/[\x00-\x1F\x7F]/g, '')
      const document = XmlService.parse(xmlClean)
      const root = document.getRootElement()

      let entries = []
      const atomNamespace = XmlService.getNamespace('http://www.w3.org/2005/Atom')
      const isAtomFeed = root.getName() === 'feed'

      if (isAtomFeed) {
        const entryElements = root.getChildren('entry', atomNamespace)
        if (entryElements && entryElements.length > 0) {
          entries = entryElements
        }
      } else if (root.getChild('channel')) {
        const channelElement = root.getChild('channel')
        const items = channelElement.getChildren('item')
        if (items && items.length > 0) {
          entries = items
        }
      }

      if (entries.length === 0) {
        Logger.log(`피드 항목 없음: ${feed.name}`)
        return
      }

      const items = entries
        .map((entry) => {
          let title, link, pubDateText

          if (isAtomFeed) {
            title = entry.getChildText('title', atomNamespace)
            const linkElement = entry.getChild('link', atomNamespace)
            link = linkElement ? linkElement.getAttribute('href').getValue() : null
            pubDateText = entry.getChildText('updated', atomNamespace)
          } else {
            title = entry.getChildText('title')
            link = entry.getChildText('link')
            pubDateText = entry.getChildText('pubDate')
          }

          const pubDate = pubDateText ? new Date(pubDateText) : null

          return { title, link, pubDate }
        })
        .filter((item) => {
          if (feed.isGeekNews) {
            return true
          }

          if (!item.pubDate) return false

          const pubTime = new Date(item.pubDate).getTime()

          // 긱뉴스를 제외하고 어제 오전 8시 부터 오늘 오전 8시까지 발행된 글만 필터링
          return pubTime > yesterday8am.getTime() && pubTime <= today8am.getTime()
        })

      if (items.length > 0) {
        emailBody += `<h3 style="color: #4CAF50; border-bottom: 1px solid #eee; padding-bottom: 5px;">${feed.name}</h3><ul style="padding-left: 20px; margin-bottom: 20px;">`

        items.forEach((item) => {
          let translatedTitle = ''

          if (feed.translate) {
            try {
              translatedTitle = LanguageApp.translate(item.title, 'en', 'ko')
            } catch (error) {
              Logger.log(`번역 오류: ${error}`)
            }
          }

          if (translatedTitle) {
            emailBody += `
            <li style="margin-bottom: 8px;">
              <a href="${item.link}" style="color: #1a73e8; text-decoration: none;" target="_blank">
                ${translatedTitle} (${item.title})
              </a>
            </li>
          `
          } else {
            emailBody += `
            <li style="margin-bottom: 8px;">
              <a href="${item.link}" style="color: #1a73e8; text-decoration: none;" target="_blank">
                ${item.title}
              </a>
            </li>
          `
          }
        })

        emailBody += '</ul>'
      }
    } catch (e) {
      Logger.log(`피드 처리 중 오류 (${feed.name}): ${e}`)
    }
  })

  emailBody += `
    <hr style="border: none; border-top: 1px solid #eee;" />
    <p style="font-size: 12px; color: #999; text-align: center;">
      본 메일은 자동으로 발송되었습니다 ✉️ <br/>
      좋은 하루 되세요!
    </p>
  </div>
  `

  if (emailBody.includes('<li')) {
    const today = Utilities.formatDate(now, timezone, 'yy.MM.dd')
    const subject = `오늘 ${today}의 기술블로그야 꼭 읽어보렴🩵`
    const recipient = Session.getActiveUser().getEmail()

    MailApp.sendEmail({
      to: recipient,
      subject: subject,
      htmlBody: emailBody,
    })
  }
}