본문 이미지 최적화 및 백필 보정

scripts/backfill-post-body-thumbnails.js

@@ -0,0 +1,112 @@
+import { existsSync, readFileSync } from 'node:fs'
+import postgres from 'postgres'
+import {
+  createPostBodyThumbnailForImageUrl,
+  extractPostImageUrlsFromContent,
+  getExistingPostBodyPreviewThumbnailUrl,
+  getExistingPostBodyThumbnailUrl,
+  getPostBodyThumbnailUrl
+} from '../server/utils/post-thumbnail-image.js'
+
+/**
+ * 로컬 실행용 환경 파일을 process.env에 반영한다.
+ * @returns {void}
+ */
+const loadEnvironmentFile = () => {
+  const candidates = [
+    process.env.ENV_FILE,
+    '.env.development',
+    '.env'
+  ].filter(Boolean)
+  const envFile = candidates.find((filePath) => existsSync(filePath))
+
+  if (!envFile) {
+    return
+  }
+
+  const lines = readFileSync(envFile, 'utf8').split(/\r?\n/)
+
+  for (const line of lines) {
+    const trimmedLine = line.trim()
+
+    if (!trimmedLine || trimmedLine.startsWith('#')) {
+      continue
+    }
+
+    const separatorIndex = trimmedLine.indexOf('=')
+
+    if (separatorIndex === -1) {
+      continue
+    }
+
+    const key = trimmedLine.slice(0, separatorIndex).trim()
+    const rawValue = trimmedLine.slice(separatorIndex + 1).trim()
+
+    if (!key || process.env[key] !== undefined) {
+      continue
+    }
+
+    process.env[key] = rawValue.replace(/^['"]|['"]$/g, '')
+  }
+}
+
+/**
+ * 게시물 본문 목록을 조회한다.
+ * @returns {Promise<Array<{ content: string }>>} 게시물 본문 목록
+ */
+const listPostContents = async () => {
+  loadEnvironmentFile()
+
+  if (!process.env.DATABASE_URL) {
+    throw new Error('DATABASE_URL 환경 변수가 필요합니다.')
+  }
+
+  const sql = postgres(process.env.DATABASE_URL, {
+    max: 1,
+    idle_timeout: 5,
+    connect_timeout: 10
+  })
+
+  try {
+    return await sql`
+      SELECT content
+      FROM posts
+      WHERE content IS NOT NULL
+      ORDER BY COALESCE(published_at, updated_at) DESC
+    `
+  } finally {
+    await sql.end({ timeout: 5 })
+  }
+}
+
+const postContents = await listPostContents()
+const imageUrls = [...new Set(postContents
+  .flatMap((post) => extractPostImageUrlsFromContent(post.content))
+  .filter((url) => getPostBodyThumbnailUrl(url)))]
+let createdCount = 0
+let skippedCount = 0
+let failedCount = 0
+
+for (const imageUrl of imageUrls) {
+  if (getExistingPostBodyThumbnailUrl(imageUrl) && getExistingPostBodyPreviewThumbnailUrl(imageUrl)) {
+    skippedCount += 1
+    continue
+  }
+
+  const thumbnailUrl = await createPostBodyThumbnailForImageUrl(imageUrl)
+
+  if (thumbnailUrl) {
+    createdCount += 1
+  } else {
+    failedCount += 1
+  }
+}
+
+process.stdout.write([
+  '게시물 본문 표시용 이미지 생성 완료:',
+  `게시물 ${postContents.length}개`,
+  `대상 ${imageUrls.length}개`,
+  `생성 ${createdCount}개`,
+  `기존 ${skippedCount}개`,
+  `실패 ${failedCount}개`
+].join(' ') + '\n')