관리자 글 목록 백링크 열 추가

server/repositories/content-repository.js

@@ -106,6 +106,7 @@ const mapAdminPostSummaryRow = (row) => ({
   publishedAt: row.published_at ? row.published_at.toISOString() : null,
   createdAt: row.created_at.toISOString(),
   updatedAt: row.updated_at.toISOString(),
+  backlinkCount: Number(row.backlinkCount || row.backlink_count || 0),
   tags: row.tags || []
 })
 
@@ -139,6 +140,57 @@ const countPostLinkReferences = (content, slug) => {
   return [...String(content || '').matchAll(createPostLinkReferencePattern(slug))].length
 }
 
+/**
+ * 대상 게시물별 백링크 게시물 개수 맵을 생성한다.
+ * @param {Array<{ id: string, slug: string }>} targetPosts - 백링크 개수를 계산할 게시물 목록
+ * @param {Array<{ id: string, content?: string }>} sourcePosts - 링크 출처 게시물 목록
+ * @returns {Map<string, number>} 게시물 ID별 백링크 게시물 개수
+ */
+const createAdminPostBacklinkCountMap = (targetPosts, sourcePosts) => {
+  const countMap = new Map(targetPosts.map((post) => [post.id, 0]))
+
+  for (const targetPost of targetPosts) {
+    if (!targetPost?.id || !targetPost?.slug) {
+      continue
+    }
+
+    const backlinkCount = sourcePosts.filter((sourcePost) => {
+      return sourcePost.id !== targetPost.id
+        && countPostLinkReferences(sourcePost.content, targetPost.slug) > 0
+    }).length
+
+    countMap.set(targetPost.id, backlinkCount)
+  }
+
+  return countMap
+}
+
+/**
+ * 관리자 글 목록 대상의 백링크 게시물 개수를 조회한다.
+ * @param {Array<{ id: string, slug: string }>} targetPosts - 백링크 개수를 계산할 게시물 목록
+ * @returns {Promise<Map<string, number>>} 게시물 ID별 백링크 게시물 개수
+ */
+const getAdminPostBacklinkCountMap = async (targetPosts) => {
+  const sql = getPostgresClient()
+
+  if (!targetPosts.length) {
+    return new Map()
+  }
+
+  if (!sql) {
+    return createAdminPostBacklinkCountMap(targetPosts, getSamplePosts())
+  }
+
+  const sourceRows = await sql`
+    SELECT id, content
+    FROM posts
+    WHERE content IS NOT NULL
+      AND content <> ''
+  `
+
+  return createAdminPostBacklinkCountMap(targetPosts, sourceRows)
+}
+
 /**
  * 관리자 글 목록 페이지 표시 개수를 정규화한다.
  * @param {unknown} value - 요청 표시 개수
@@ -617,14 +669,23 @@ export const listAdminPosts = async (options = {}) => {
     })
 
     if (!paged) {
-      return samplePosts.map(({ sortAt, ...post }) => post)
+      const items = samplePosts.map(({ sortAt, ...post }) => post)
+      const backlinkCounts = createAdminPostBacklinkCountMap(items, getSamplePosts())
+      return items.map((post) => ({
+        ...post,
+        backlinkCount: backlinkCounts.get(post.id) || 0
+      }))
     }
 
     const total = samplePosts.length
     const items = samplePosts.slice(offset, offset + pageSize).map(({ sortAt, ...post }) => post)
+    const backlinkCounts = createAdminPostBacklinkCountMap(items, getSamplePosts())
 
     return {
-      items,
+      items: items.map((post) => ({
+        ...post,
+        backlinkCount: backlinkCounts.get(post.id) || 0
+      })),
       pagination: {
         page,
         pageSize,
@@ -732,8 +793,14 @@ export const listAdminPosts = async (options = {}) => {
     OFFSET ${paged ? offset : 0}
   `
 
+  const backlinkCounts = await getAdminPostBacklinkCountMap(rows)
+  const mapAdminPostSummaryRowWithBacklinks = (row) => ({
+    ...mapAdminPostSummaryRow(row),
+    backlinkCount: backlinkCounts.get(row.id) || 0
+  })
+
   if (!paged) {
-    return rows.map(mapAdminPostSummaryRow)
+    return rows.map(mapAdminPostSummaryRowWithBacklinks)
   }
 
   const countsRows = await sql`
@@ -791,7 +858,7 @@ export const listAdminPosts = async (options = {}) => {
   const total = Number(totalRows[0]?.total || 0)
 
   return {
-    items: rows.map(mapAdminPostSummaryRow),
+    items: rows.map(mapAdminPostSummaryRowWithBacklinks),
     pagination: {
       page,
       pageSize,