class Group < ActiveRecord::Base has_many :category_groups has_many :group_users, dependent: :destroy has_many :categories, through: :category_groups has_many :users, through: :group_users after_save :destroy_deletions validate :name_format_validator AUTO_GROUPS = { :everyone => 0, :admins => 1, :moderators => 2, :staff => 3, :trust_level_1 => 11, :trust_level_2 => 12, :trust_level_3 => 13, :trust_level_4 => 14, :trust_level_5 => 15 } def self.trust_group_ids (10..19).to_a end def self.refresh_automatic_group!(name) id = AUTO_GROUPS[name] return unless id unless group = self.lookup_group(name) group = Group.new(name: name.to_s, automatic: true) group.id = id group.save! end # the everyone group is special, it can include non-users so there is no # way to have the membership in a table return group if name == :everyone group.name = I18n.t("groups.default_names.#{name}") # don't allow shoddy localization to break this validator = UsernameValidator.new(group.name) unless validator.valid_format? group.name = name end real_ids = case name when :admins "SELECT u.id FROM users u WHERE u.admin" when :moderators "SELECT u.id FROM users u WHERE u.moderator" when :staff "SELECT u.id FROM users u WHERE u.moderator OR u.admin" when :trust_level_1, :trust_level_2, :trust_level_3, :trust_level_4, :trust_level_5 "SELECT u.id FROM users u WHERE u.trust_level = #{id-10}" end extra_users = group.users.where("users.id NOT IN (#{real_ids})").select('users.id') missing_users = GroupUser .joins("RIGHT JOIN (#{real_ids}) X ON X.id = user_id AND group_id = #{group.id}") .where("user_id IS NULL") .select("X.id") group.group_users.where("user_id IN (#{extra_users.to_sql})").delete_all missing_users.each do |u| group.group_users.build(user_id: u.id) end group.save! # we want to ensure consistency Group.reset_counters(group.id, :group_users) group end def self.refresh_automatic_groups!(*args) if args.length == 0 args = AUTO_GROUPS.keys end args.each do |group| refresh_automatic_group!(group) end end def self.[](name) lookup_group(name) || refresh_automatic_group!(name) end def self.lookup_group(name) id = AUTO_GROUPS[name] if id Group.where(id: id).first else unless group = Group.where(name: name).first raise ArgumentError, "unknown group" unless group end group end end def self.user_trust_level_change!(user_id, trust_level) name = "trust_level_#{trust_level}".to_sym GroupUser.where(group_id: trust_group_ids, user_id: user_id).delete_all if group = lookup_group(name) group.group_users.build(user_id: user_id) group.save! else refresh_automatic_group!(name) end end def self.builtin Enum.new(:moderators, :admins, :trust_level_1, :trust_level_2) end def usernames=(val) current = usernames.split(",") expected = val.split(",") additions = expected - current deletions = current - expected map = Hash[*User.where(username: additions+deletions) .select('id,username') .map{|u| [u.username,u.id]}.flatten] deletions = Set.new(deletions.map{|d| map[d]}) @deletions = [] group_users.delete_if do |gu| @deletions << gu if deletions.include?(gu.user_id) end additions.each do |a| group_users.build(user_id: map[a]) end end def usernames users.pluck(:username).join(",") end def add(user) self.users.push(user) end protected def name_format_validator UsernameValidator.perform_validation(self, 'name') end # hack around AR def destroy_deletions if @deletions @deletions.each do |gu| gu.destroy end end @deletions = nil end end # == Schema Information # # Table name: groups # # id :integer not null, primary key # name :string(255) not null # created_at :datetime not null # updated_at :datetime not null # automatic :boolean default(FALSE), not null # user_count :integer default(0), not null # # Indexes # # index_groups_on_name (name) UNIQUE #