본인 티어표 복사 복구와 팔로우 피드 추가

backend/src/db.js

@@ -426,6 +426,18 @@ async function ensureSchema() {
       ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4
     `)
 
+    await query(`
+      CREATE TABLE IF NOT EXISTS user_follows (
+        follower_id VARCHAR(64) NOT NULL,
+        following_id VARCHAR(64) NOT NULL,
+        created_at BIGINT NOT NULL,
+        PRIMARY KEY (follower_id, following_id),
+        INDEX idx_user_follows_following (following_id, created_at),
+        CONSTRAINT fk_user_follows_follower FOREIGN KEY (follower_id) REFERENCES users(id) ON DELETE CASCADE,
+        CONSTRAINT fk_user_follows_following FOREIGN KEY (following_id) REFERENCES users(id) ON DELETE CASCADE
+      ) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4
+    `)
+
     await query(`
       CREATE TABLE IF NOT EXISTS image_assets (
         id VARCHAR(64) PRIMARY KEY,
@@ -2182,6 +2194,198 @@ async function listUserTierLists(userId) {
   return applyFavoriteMetaToTierLists(tierLists, favoriteStats)
 }
 
+async function findUserProfileById(userId, currentUserId = '') {
+  const rows = await query(
+    `
+      SELECT
+        u.id,
+        u.email,
+        u.nickname,
+        u.avatar_src,
+        u.created_at,
+        (
+          SELECT COUNT(*)
+          FROM tierlists t
+          WHERE t.author_id = u.id AND t.is_public = 1
+        ) AS public_tierlist_count,
+        (
+          SELECT COUNT(*)
+          FROM user_follows uf
+          WHERE uf.following_id = u.id
+        ) AS follower_count,
+        (
+          SELECT COUNT(*)
+          FROM user_follows uf
+          WHERE uf.follower_id = u.id
+        ) AS following_count,
+        ${
+          currentUserId
+            ? `EXISTS(
+                SELECT 1
+                FROM user_follows uf
+                WHERE uf.follower_id = ? AND uf.following_id = u.id
+              )`
+            : '0'
+        } AS is_following
+      FROM users u
+      WHERE u.id = ?
+      LIMIT 1
+    `,
+    currentUserId ? [currentUserId, userId] : [userId]
+  )
+  const row = rows[0]
+  if (!row) return null
+  return {
+    id: row.id,
+    nickname: row.nickname || '',
+    accountName: getUserAccountName(row),
+    avatarSrc: row.avatar_src || '',
+    createdAt: Number(row.created_at || 0),
+    publicTierListCount: Number(row.public_tierlist_count || 0),
+    followerCount: Number(row.follower_count || 0),
+    followingCount: Number(row.following_count || 0),
+    isFollowing: !!row.is_following,
+    isSelf: !!currentUserId && currentUserId === row.id,
+  }
+}
+
+async function followUser({ followerId, followingId }) {
+  await query('INSERT IGNORE INTO user_follows (follower_id, following_id, created_at) VALUES (?, ?, ?)', [
+    followerId,
+    followingId,
+    now(),
+  ])
+}
+
+async function unfollowUser({ followerId, followingId }) {
+  await query('DELETE FROM user_follows WHERE follower_id = ? AND following_id = ?', [followerId, followingId])
+}
+
+async function listPublicTierListsByAuthor(authorId, currentUserId = '', queryText = '') {
+  const params = [authorId]
+  let whereClause = 'WHERE t.author_id = ? AND t.is_public = 1'
+  if ((queryText || '').trim()) {
+    const search = `%${queryText.trim()}%`
+    whereClause += ' AND (t.title LIKE ? OR tp.name LIKE ?)'
+    params.push(search, search)
+  }
+
+  const rows = await query(
+    `
+      SELECT
+        t.id,
+        t.topic_id,
+        tp.name AS topic_name,
+        t.title,
+        t.thumbnail_src,
+        t.is_public,
+        t.is_featured,
+        t.featured_at,
+        t.featured_by,
+        t.created_at,
+        t.updated_at,
+        t.author_id,
+        u.nickname,
+        u.email,
+        u.avatar_src
+      FROM tierlists t
+      INNER JOIN users u ON u.id = t.author_id
+      INNER JOIN topics tp ON tp.id = t.topic_id
+      ${whereClause}
+      ORDER BY t.is_featured DESC, t.featured_at DESC, t.updated_at DESC
+      LIMIT 200
+    `,
+    params
+  )
+
+  const tierLists = rows.map((row) => ({
+    id: row.id,
+    topicId: row.topic_id,
+    topicName: row.topic_name || '',
+    title: row.title,
+    thumbnailSrc: row.thumbnail_src || '',
+    isPublic: !!row.is_public,
+    isFeatured: !!row.is_featured,
+    featuredAt: Number(row.featured_at || 0),
+    createdAt: Number(row.created_at),
+    updatedAt: Number(row.updated_at),
+    authorId: row.author_id,
+    authorName: getUserDisplayName(row),
+    authorAccountName: getUserAccountName(row),
+    authorAvatarSrc: row.avatar_src || '',
+  }))
+
+  const favoriteStats = await getFavoriteStatsForTierListIds(
+    tierLists.map((tierList) => tierList.id),
+    currentUserId
+  )
+  return applyFavoriteMetaToTierLists(tierLists, favoriteStats)
+}
+
+async function listFollowingTierLists(userId, queryText = '') {
+  const params = [userId]
+  let whereClause = 'WHERE uf.follower_id = ? AND t.is_public = 1'
+  if ((queryText || '').trim()) {
+    const search = `%${queryText.trim()}%`
+    whereClause += ' AND (t.title LIKE ? OR tp.name LIKE ? OR u.nickname LIKE ? OR u.email LIKE ?)'
+    params.push(search, search, search, search)
+  }
+
+  const rows = await query(
+    `
+      SELECT
+        t.id,
+        t.topic_id,
+        tp.name AS topic_name,
+        t.title,
+        t.thumbnail_src,
+        t.is_public,
+        t.is_featured,
+        t.featured_at,
+        t.featured_by,
+        t.created_at,
+        t.updated_at,
+        t.author_id,
+        uf.created_at AS followed_at,
+        u.nickname,
+        u.email,
+        u.avatar_src
+      FROM user_follows uf
+      INNER JOIN tierlists t ON t.author_id = uf.following_id
+      INNER JOIN users u ON u.id = t.author_id
+      INNER JOIN topics tp ON tp.id = t.topic_id
+      ${whereClause}
+      ORDER BY t.updated_at DESC, uf.created_at DESC
+      LIMIT 200
+    `,
+    params
+  )
+
+  const tierLists = rows.map((row) => ({
+    id: row.id,
+    topicId: row.topic_id,
+    topicName: row.topic_name || '',
+    title: row.title,
+    thumbnailSrc: row.thumbnail_src || '',
+    isPublic: !!row.is_public,
+    isFeatured: !!row.is_featured,
+    featuredAt: Number(row.featured_at || 0),
+    createdAt: Number(row.created_at),
+    updatedAt: Number(row.updated_at),
+    authorId: row.author_id,
+    authorName: getUserDisplayName(row),
+    authorAccountName: getUserAccountName(row),
+    authorAvatarSrc: row.avatar_src || '',
+    isFavorited: false,
+  }))
+
+  const favoriteStats = await getFavoriteStatsForTierListIds(
+    tierLists.map((tierList) => tierList.id),
+    userId
+  )
+  return applyFavoriteMetaToTierLists(tierLists, favoriteStats)
+}
+
 function uniqueTierListItems(poolItems) {
   const map = new Map()
   ;(poolItems || []).forEach((item) => {
@@ -2726,6 +2930,7 @@ module.exports = {
   findUserByEmail,
   findUserByNickname,
   findUserById,
+  findUserProfileById,
   createUser,
   updateUserPassword,
   verifyUserEmail,
@@ -2779,6 +2984,8 @@ module.exports = {
   listCustomItems,
   findUnusedCustomItems,
   listPublicTierLists,
+  listPublicTierListsByAuthor,
+  listFollowingTierLists,
   listFavoriteTierLists,
   listUserTierLists,
   listAdminTierLists,
@@ -2788,6 +2995,8 @@ module.exports = {
   updateTierListFeaturedStatus,
   favoriteTopic,
   unfavoriteTopic,
+  followUser,
+  unfollowUser,
   favoriteTierList,
   unfavoriteTierList,
   deleteTierList,