class UserMerger def initialize(source_user, target_user, acting_user = nil) @source_user = source_user @target_user = target_user @acting_user = acting_user @source_primary_email = source_user.email end def merge! update_username move_posts update_user_ids merge_given_daily_likes merge_post_timings merge_user_visits update_site_settings merge_user_attributes DiscourseEvent.trigger(:merging_users, @source_user, @target_user) update_user_stats delete_source_user delete_source_user_references log_merge end protected def update_username UsernameChanger.update_username(user_id: @source_user.id, old_username: @source_user.username, new_username: @target_user.username, avatar_template: @target_user.avatar_template, asynchronous: false) end def move_posts posts = Post.with_deleted .where(user_id: @source_user.id) .order(:topic_id, :post_number) .pluck(:topic_id, :id) last_topic_id = nil post_ids = [] posts.each do |current_topic_id, current_post_id| if last_topic_id != current_topic_id && post_ids.any? change_post_owner(last_topic_id, post_ids) post_ids = [] end last_topic_id = current_topic_id post_ids << current_post_id end change_post_owner(last_topic_id, post_ids) if post_ids.any? end def change_post_owner(topic_id, post_ids) PostOwnerChanger.new( topic_id: topic_id, post_ids: post_ids, new_owner: @target_user, acting_user: Discourse.system_user, skip_revision: true ).change_owner! end def merge_given_daily_likes sql = <<~SQL INSERT INTO given_daily_likes AS g (user_id, likes_given, given_date, limit_reached) SELECT :target_user_id AS user_id, COUNT(1) AS likes_given, a.created_at::DATE AS given_date, COUNT(1) >= :max_likes_per_day AS limit_reached FROM post_actions AS a WHERE a.user_id = :target_user_id AND a.deleted_at IS NULL AND EXISTS( SELECT 1 FROM given_daily_likes AS g WHERE g.user_id = :source_user_id AND a.created_at::DATE = g.given_date ) GROUP BY given_date ON CONFLICT (user_id, given_date) DO UPDATE SET likes_given = EXCLUDED.likes_given, limit_reached = EXCLUDED.limit_reached SQL DB.exec( sql, source_user_id: @source_user.id, target_user_id: @target_user.id, max_likes_per_day: SiteSetting.max_likes_per_day, action_type_id: PostActionType.types[:like] ) end def merge_post_timings update_user_id(:post_timings, conditions: ["x.topic_id = y.topic_id", "x.post_number = y.post_number"]) sql = <<~SQL UPDATE post_timings AS t SET msecs = t.msecs + s.msecs FROM post_timings AS s WHERE t.user_id = :target_user_id AND s.user_id = :source_user_id AND t.topic_id = s.topic_id AND t.post_number = s.post_number SQL DB.exec(sql, source_user_id: @source_user.id, target_user_id: @target_user.id) end def merge_user_visits update_user_id(:user_visits, conditions: "x.visited_at = y.visited_at") sql = <<~SQL UPDATE user_visits AS t SET posts_read = t.posts_read + s.posts_read, mobile = t.mobile OR s.mobile, time_read = t.time_read + s.time_read FROM user_visits AS s WHERE t.user_id = :target_user_id AND s.user_id = :source_user_id AND t.visited_at = s.visited_at SQL DB.exec(sql, source_user_id: @source_user.id, target_user_id: @target_user.id) end def update_site_settings SiteSetting.all_settings(true).each do |setting| if setting[:type] == "username" && setting[:value] == @source_user.username SiteSetting.set_and_log(setting[:setting], @target_user.username) end end end def update_user_stats # topics_entered DB.exec(<<~SQL, target_user_id: @target_user.id) UPDATE user_stats SET topics_entered = ( SELECT COUNT(topic_id) FROM topic_views WHERE user_id = :target_user_id ) WHERE user_id = :target_user_id SQL # time_read and days_visited DB.exec(<<~SQL, target_user_id: @target_user.id) UPDATE user_stats SET time_read = COALESCE(x.time_read, 0), days_visited = COALESCE(x.days_visited, 0) FROM ( SELECT SUM(time_read) AS time_read, COUNT(1) AS days_visited FROM user_visits WHERE user_id = :target_user_id ) AS x WHERE user_id = :target_user_id SQL # posts_read_count DB.exec(<<~SQL, target_user_id: @target_user.id) UPDATE user_stats SET posts_read_count = ( SELECT COUNT(1) FROM post_timings AS pt WHERE pt.user_id = :target_user_id AND EXISTS( SELECT 1 FROM topics AS t WHERE t.archetype = 'regular' AND t.deleted_at IS NULL )) WHERE user_id = :target_user_id SQL # likes_given, likes_received, new_since, read_faq, first_post_created_at DB.exec(<<~SQL, source_user_id: @source_user.id, target_user_id: @target_user.id) UPDATE user_stats AS t SET likes_given = t.likes_given + s.likes_given, likes_received = t.likes_received + s.likes_received, new_since = LEAST(t.new_since, s.new_since), read_faq = LEAST(t.read_faq, s.read_faq), first_post_created_at = LEAST(t.first_post_created_at, s.first_post_created_at) FROM user_stats AS s WHERE t.user_id = :target_user_id AND s.user_id = :source_user_id SQL end def merge_user_attributes DB.exec(<<~SQL, source_user_id: @source_user.id, target_user_id: @target_user.id) UPDATE users AS t SET created_at = LEAST(t.created_at, s.created_at), updated_at = LEAST(t.updated_at, s.updated_at), seen_notification_id = GREATEST(t.seen_notification_id, s.seen_notification_id), last_posted_at = GREATEST(t.last_seen_at, s.last_seen_at), last_seen_at = GREATEST(t.last_seen_at, s.last_seen_at), admin = t.admin OR s.admin, last_emailed_at = GREATEST(t.last_emailed_at, s.last_emailed_at), trust_level = GREATEST(t.trust_level, s.trust_level), previous_visit_at = GREATEST(t.previous_visit_at, s.previous_visit_at), date_of_birth = COALESCE(t.date_of_birth, s.date_of_birth), ip_address = COALESCE(t.ip_address, s.ip_address), moderator = t.moderator OR s.moderator, title = COALESCE(t.title, s.title), primary_group_id = COALESCE(t.primary_group_id, s.primary_group_id), registration_ip_address = COALESCE(t.registration_ip_address, s.registration_ip_address), first_seen_at = LEAST(t.first_seen_at, s.first_seen_at), manual_locked_trust_level = GREATEST(t.manual_locked_trust_level, s.manual_locked_trust_level) FROM users AS s WHERE t.id = :target_user_id AND s.id = :source_user_id SQL DB.exec(<<~SQL, source_user_id: @source_user.id, target_user_id: @target_user.id) UPDATE user_profiles AS t SET location = COALESCE(t.location, s.location), website = COALESCE(t.website, s.website), bio_raw = COALESCE(t.bio_raw, s.bio_raw), bio_cooked = COALESCE(t.bio_cooked, s.bio_cooked), bio_cooked_version = COALESCE(t.bio_cooked_version, s.bio_cooked_version), profile_background = COALESCE(t.profile_background, s.profile_background), dismissed_banner_key = COALESCE(t.dismissed_banner_key, s.dismissed_banner_key), badge_granted_title = t.badge_granted_title OR s.badge_granted_title, card_background = COALESCE(t.card_background, s.card_background), views = t.views + s.views FROM user_profiles AS s WHERE t.user_id = :target_user_id AND s.user_id = :source_user_id SQL end def update_user_ids Category.where(user_id: @source_user.id).update_all(user_id: @target_user.id) update_user_id(:category_users, conditions: ["x.category_id = y.category_id"]) update_user_id(:developers) update_user_id(:draft_sequences, conditions: "x.draft_key = y.draft_key") update_user_id(:drafts, conditions: "x.draft_key = y.draft_key") EmailLog.where(user_id: @source_user.id).update_all(user_id: @target_user.id) GroupHistory.where(acting_user_id: @source_user.id).update_all(acting_user_id: @target_user.id) GroupHistory.where(target_user_id: @source_user.id).update_all(target_user_id: @target_user.id) update_user_id(:group_users, conditions: "x.group_id = y.group_id") IncomingEmail.where(user_id: @source_user.id).update_all(user_id: @target_user.id) IncomingLink.where(user_id: @source_user.id).update_all(user_id: @target_user.id) IncomingLink.where(current_user_id: @source_user.id).update_all(current_user_id: @target_user.id) Invite.with_deleted.where(user_id: @source_user.id).update_all(user_id: @target_user.id) Invite.with_deleted.where(invited_by_id: @source_user.id).update_all(invited_by_id: @target_user.id) Invite.with_deleted.where(deleted_by_id: @source_user.id).update_all(deleted_by_id: @target_user.id) update_user_id(:muted_users, conditions: "x.muted_user_id = y.muted_user_id") update_user_id(:muted_users, user_id_column_name: "muted_user_id", conditions: "x.user_id = y.user_id") Notification.where(user_id: @source_user.id).update_all(user_id: @target_user.id) update_user_id(:post_actions, conditions: ["x.post_id = y.post_id", "x.post_action_type_id = y.post_action_type_id", "x.targets_topic = y.targets_topic"]) PostAction.where(deleted_by_id: @source_user.id).update_all(deleted_by_id: @target_user.id) PostAction.where(deferred_by_id: @source_user.id).update_all(deferred_by_id: @target_user.id) PostAction.where(agreed_by_id: @source_user.id).update_all(agreed_by_id: @target_user.id) PostAction.where(disagreed_by_id: @source_user.id).update_all(disagreed_by_id: @target_user.id) PostRevision.where(user_id: @source_user.id).update_all(user_id: @target_user.id) Post.with_deleted.where(deleted_by_id: @source_user.id).update_all(deleted_by_id: @target_user.id) Post.with_deleted.where(last_editor_id: @source_user.id).update_all(last_editor_id: @target_user.id) Post.with_deleted.where(locked_by_id: @source_user.id).update_all(locked_by_id: @target_user.id) Post.with_deleted.where(reply_to_user_id: @source_user.id).update_all(reply_to_user_id: @target_user.id) QueuedPost.where(user_id: @source_user.id).update_all(user_id: @target_user.id) QueuedPost.where(approved_by_id: @source_user.id).update_all(approved_by_id: @target_user.id) QueuedPost.where(rejected_by_id: @source_user.id).update_all(rejected_by_id: @target_user.id) SearchLog.where(user_id: @source_user.id).update_all(user_id: @target_user.id) update_user_id(:tag_users, conditions: "x.tag_id = y.tag_id") Theme.where(user_id: @source_user.id).update_all(user_id: @target_user.id) update_user_id(:topic_allowed_users, conditions: "x.topic_id = y.topic_id") TopicEmbed.with_deleted.where(deleted_by_id: @source_user.id).update_all(deleted_by_id: @target_user.id) TopicLink.where(user_id: @source_user.id).update_all(user_id: @target_user.id) TopicLinkClick.where(user_id: @source_user.id).update_all(user_id: @target_user.id) TopicTimer.with_deleted.where(deleted_by_id: @source_user.id).update_all(deleted_by_id: @target_user.id) update_user_id(:topic_timers, conditions: ["x.status_type = y.status_type", "x.topic_id = y.topic_id", "y.deleted_at IS NULL"]) update_user_id(:topic_users, conditions: "x.topic_id = y.topic_id") update_user_id(:topic_views, conditions: "x.topic_id = y.topic_id") Topic.with_deleted.where(deleted_by_id: @source_user.id).update_all(deleted_by_id: @target_user.id) UnsubscribeKey.where(user_id: @source_user.id).update_all(user_id: @target_user.id) Upload.where(user_id: @source_user.id).update_all(user_id: @target_user.id) update_user_id(:user_archived_messages, conditions: "x.topic_id = y.topic_id") update_user_id(:user_actions, user_id_column_name: "user_id", conditions: ["x.action_type = y.action_type", "x.target_topic_id IS NOT DISTINCT FROM y.target_topic_id", "x.target_post_id IS NOT DISTINCT FROM y.target_post_id", "(x.acting_user_id IN (:source_user_id, :target_user_id) OR x.acting_user_id IS NOT DISTINCT FROM y.acting_user_id)"]) update_user_id(:user_actions, user_id_column_name: "acting_user_id", conditions: ["x.action_type = y.action_type", "x.user_id = y.user_id", "x.target_topic_id IS NOT DISTINCT FROM y.target_topic_id", "x.target_post_id IS NOT DISTINCT FROM y.target_post_id"]) update_user_id(:user_badges, conditions: ["x.badge_id = y.badge_id", "x.seq = y.seq", "x.post_id IS NOT DISTINCT FROM y.post_id"]) UserBadge.where(granted_by_id: @source_user.id).update_all(granted_by_id: @target_user.id) update_user_id(:user_custom_fields, conditions: "x.name = y.name") update_user_id(:user_emails, conditions: "x.email = y.email OR y.primary = false", updates: '"primary" = false') UserExport.where(user_id: @source_user.id).update_all(user_id: @target_user.id) UserHistory.where(target_user_id: @source_user.id).update_all(target_user_id: @target_user.id) UserHistory.where(acting_user_id: @source_user.id).update_all(acting_user_id: @target_user.id) UserProfileView.where(user_profile_id: @source_user.id).update_all(user_profile_id: @target_user.id) UserProfileView.where(user_id: @source_user.id).update_all(user_id: @target_user.id) UserWarning.where(user_id: @source_user.id).update_all(user_id: @target_user.id) UserWarning.where(created_by_id: @source_user.id).update_all(created_by_id: @target_user.id) User.where(approved_by_id: @source_user.id).update_all(approved_by_id: @target_user.id) end def delete_source_user @source_user.reload @source_user.update_attributes( admin: false, email: "#{@source_user.username}_#{SecureRandom.hex}@no-email.invalid" ) UserDestroyer.new(Discourse.system_user).destroy(@source_user, quiet: true) end def delete_source_user_references Developer.where(user_id: @source_user.id).delete_all DraftSequence.where(user_id: @source_user.id).delete_all GivenDailyLike.where(user_id: @source_user.id).delete_all MutedUser.where(user_id: @source_user.id).or(MutedUser.where(muted_user_id: @source_user.id)).delete_all UserAuthTokenLog.where(user_id: @source_user.id).delete_all UserAvatar.where(user_id: @source_user.id).delete_all UserAction.where(acting_user_id: @source_user.id).delete_all end def log_merge logger = StaffActionLogger.new(@acting_user || Discourse.system_user) logger.log_user_merge(@target_user, @source_user.username, @source_primary_email) end def update_user_id(table_name, opts = {}) builder = update_user_id_sql_builder(table_name, opts) builder.exec(source_user_id: @source_user.id, target_user_id: @target_user.id) end def update_user_id_sql_builder(table_name, opts = {}) user_id_column_name = opts[:user_id_column_name] || :user_id conditions = Array.wrap(opts[:conditions]) updates = Array.wrap(opts[:updates]) builder = DB.build(<<~SQL) UPDATE #{table_name} AS x /*set*/ WHERE x.#{user_id_column_name} = :source_user_id AND NOT EXISTS( SELECT 1 FROM #{table_name} AS y /*where*/ ) SQL builder.set("#{user_id_column_name} = :target_user_id") updates.each { |u| builder.set(u) } builder.where("y.#{user_id_column_name} = :target_user_id") conditions.each { |c| builder.where(c) } builder end end