diff options
Diffstat (limited to 'lib/gitlab/project_authorizations/with_nested_groups.rb')
| -rw-r--r-- | lib/gitlab/project_authorizations/with_nested_groups.rb | 125 |
1 files changed, 0 insertions, 125 deletions
diff --git a/lib/gitlab/project_authorizations/with_nested_groups.rb b/lib/gitlab/project_authorizations/with_nested_groups.rb deleted file mode 100644 index 2372a316ab0..00000000000 --- a/lib/gitlab/project_authorizations/with_nested_groups.rb +++ /dev/null @@ -1,125 +0,0 @@ -# frozen_string_literal: true - -module Gitlab - module ProjectAuthorizations - # Calculating new project authorizations when supporting nested groups. - # - # This class relies on Common Table Expressions to efficiently get all data, - # including data for nested groups. As a result this class can only be used - # on PostgreSQL. - class WithNestedGroups - attr_reader :user - - # user - The User object for which to calculate the authorizations. - def initialize(user) - @user = user - end - - def calculate - cte = recursive_cte - cte_alias = cte.table.alias(Group.table_name) - projects = Project.arel_table - links = ProjectGroupLink.arel_table - - relations = [ - # The project a user has direct access to. - user.projects.select_for_project_authorization, - - # The personal projects of the user. - user.personal_projects.select_as_maintainer_for_project_authorization, - - # Projects that belong directly to any of the groups the user has - # access to. - Namespace - .unscoped - .select([alias_as_column(projects[:id], 'project_id'), - cte_alias[:access_level]]) - .from(cte_alias) - .joins(:projects), - - # Projects shared with any of the namespaces the user has access to. - Namespace - .unscoped - .select([links[:project_id], - least(cte_alias[:access_level], - links[:group_access], - 'access_level')]) - .from(cte_alias) - .joins('INNER JOIN project_group_links ON project_group_links.group_id = namespaces.id') - .joins('INNER JOIN projects ON projects.id = project_group_links.project_id') - .joins('INNER JOIN namespaces p_ns ON p_ns.id = projects.namespace_id') - .where('p_ns.share_with_group_lock IS FALSE') - ] - - ProjectAuthorization - .unscoped - .with - .recursive(cte.to_arel) - .select_from_union(relations) - end - - private - - # Builds a recursive CTE that gets all the groups the current user has - # access to, including any nested groups. - def recursive_cte - cte = Gitlab::SQL::RecursiveCTE.new(:namespaces_cte) - members = Member.arel_table - namespaces = Namespace.arel_table - - # Namespaces the user is a member of. - cte << user.groups - .select([namespaces[:id], members[:access_level]]) - .except(:order) - - # Sub groups of any groups the user is a member of. - cte << Group.select([namespaces[:id], - greatest(members[:access_level], - cte.table[:access_level], 'access_level')]) - .joins(join_cte(cte)) - .joins(join_members) - .except(:order) - - cte - end - - # Builds a LEFT JOIN to join optional memberships onto the CTE. - def join_members - members = Member.arel_table - namespaces = Namespace.arel_table - - cond = members[:source_id] - .eq(namespaces[:id]) - .and(members[:source_type].eq('Namespace')) - .and(members[:requested_at].eq(nil)) - .and(members[:user_id].eq(user.id)) - - Arel::Nodes::OuterJoin.new(members, Arel::Nodes::On.new(cond)) - end - - # Builds an INNER JOIN to join namespaces onto the CTE. - def join_cte(cte) - namespaces = Namespace.arel_table - cond = cte.table[:id].eq(namespaces[:parent_id]) - - Arel::Nodes::InnerJoin.new(cte.table, Arel::Nodes::On.new(cond)) - end - - def greatest(left, right, column_alias) - sql_function('GREATEST', [left, right], column_alias) - end - - def least(left, right, column_alias) - sql_function('LEAST', [left, right], column_alias) - end - - def sql_function(name, args, column_alias) - alias_as_column(Arel::Nodes::NamedFunction.new(name, args), column_alias) - end - - def alias_as_column(value, alias_to) - Arel::Nodes::As.new(value, Arel::Nodes::SqlLiteral.new(alias_to)) - end - end - end -end |