mirror of
https://github.com/discourse/discourse.git
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180 lines
4.9 KiB
Ruby
180 lines
4.9 KiB
Ruby
# frozen_string_literal: true
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# Searches for a user by username or full text or name (if enabled in SiteSettings)
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class UserSearch
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MAX_SIZE_PRIORITY_MENTION ||= 500
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def initialize(term, opts = {})
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@term = term
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@term_like = "#{term.downcase.gsub("_", "\\_")}%"
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@topic_id = opts[:topic_id]
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@category_id = opts[:category_id]
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@topic_allowed_users = opts[:topic_allowed_users]
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@searching_user = opts[:searching_user]
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@include_staged_users = opts[:include_staged_users] || false
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@limit = opts[:limit] || 20
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@groups = opts[:groups]
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@guardian = Guardian.new(@searching_user)
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@guardian.ensure_can_see_groups_members! @groups if @groups
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@guardian.ensure_can_see_category! Category.find(@category_id) if @category_id
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@guardian.ensure_can_see_topic! Topic.find(@topic_id) if @topic_id
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end
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def scoped_users
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users = User.where(active: true)
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users = users.where(staged: false) unless @include_staged_users
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if @groups
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users = users.joins("INNER JOIN group_users ON group_users.user_id = users.id")
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.where("group_users.group_id IN (?)", @groups.map(&:id))
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end
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unless @searching_user && @searching_user.staff?
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users = users.not_suspended
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end
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# Only show users who have access to private topic
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if @topic_id && @topic_allowed_users == "true"
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topic = Topic.find_by(id: @topic_id)
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if topic.category && topic.category.read_restricted
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users = users.includes(:secure_categories)
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.where("users.admin = TRUE OR categories.id = ?", topic.category.id)
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.references(:categories)
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end
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end
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users.limit(@limit)
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end
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def filtered_by_term_users
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users = scoped_users
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if @term.present?
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if SiteSetting.enable_names? && @term !~ /[_\.-]/
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query = Search.ts_query(term: @term, ts_config: "simple")
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users = users.includes(:user_search_data)
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.references(:user_search_data)
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.where("user_search_data.search_data @@ #{query}")
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.order(DB.sql_fragment("CASE WHEN username_lower LIKE ? THEN 0 ELSE 1 END ASC", @term_like))
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else
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users = users.where("username_lower LIKE :term_like", term_like: @term_like)
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end
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end
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users
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end
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def search_ids
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users = Set.new
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# 1. exact username matches
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if @term.present?
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scoped_users.where(username_lower: @term.downcase)
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.limit(@limit)
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.pluck(:id)
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.each { |id| users << id }
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end
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return users.to_a if users.length >= @limit
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# 2. in topic
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if @topic_id
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in_topic = filtered_by_term_users
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.where('users.id IN (SELECT p.user_id FROM posts p WHERE topic_id = ?)', @topic_id)
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if @searching_user.present?
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in_topic = in_topic.where('users.id <> ?', @searching_user.id)
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end
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in_topic
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.order('last_seen_at DESC')
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.limit(@limit - users.length)
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.pluck(:id)
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.each { |id| users << id }
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end
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return users.to_a if users.length >= @limit
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secure_category_id = nil
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if @category_id
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secure_category_id = DB.query_single(<<~SQL, @category_id).first
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SELECT id FROM categories
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WHERE read_restricted AND id = ?
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SQL
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elsif @topic_id
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secure_category_id = DB.query_single(<<~SQL, @topic_id).first
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SELECT id FROM categories
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WHERE read_restricted AND id IN (
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SELECT category_id FROM topics
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WHERE id = ?
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)
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SQL
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end
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# 3. category matches
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if secure_category_id
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@searching_user.present?
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category_groups = Group.where(<<~SQL, secure_category_id, MAX_SIZE_PRIORITY_MENTION)
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groups.id IN (
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SELECT group_id FROM category_groups
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JOIN groups g ON group_id = g.id
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WHERE
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category_id = ? AND
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user_count < ?
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)
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SQL
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category_groups = category_groups.members_visible_groups(@searching_user)
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in_category = filtered_by_term_users
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.where(<<~SQL, category_groups.pluck(:id))
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users.id IN (
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SELECT gu.user_id
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FROM group_users gu
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WHERE group_id IN (?)
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LIMIT 200
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)
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SQL
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if @searching_user.present?
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in_category = in_category.where('users.id <> ?', @searching_user.id)
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end
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in_category
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.order('last_seen_at DESC')
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.limit(@limit - users.length)
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.pluck(:id)
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.each { |id| users << id }
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end
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return users.to_a if users.length >= @limit
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# 4. global matches
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if @term.present?
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filtered_by_term_users.order('last_seen_at DESC')
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.limit(@limit - users.length)
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.pluck(:id)
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.each { |id| users << id }
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end
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users.to_a
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end
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def search
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ids = search_ids
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return User.where("0=1") if ids.empty?
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User.joins("JOIN (SELECT unnest uid, row_number() OVER () AS rn
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FROM unnest('{#{ids.join(",")}}'::int[])
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) x on uid = users.id")
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.order("rn")
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end
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end
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