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# frozen_string_literal: true
module Gitlab
module Graphql
module Authorize
class ConnectionFilterExtension < GraphQL::Schema::FieldExtension
class Redactor
include ::Gitlab::Graphql::Laziness
def initialize(type, context)
@type = type
@context = context
end
def redact(nodes)
remove_unauthorized(nodes)
nodes
end
def active?
# some scalar types (such as integers) do not respond to :authorized?
return false unless @type.respond_to?(:authorized?)
auth = @type.try(:authorization)
auth.nil? || auth.any?
end
private
def remove_unauthorized(nodes)
nodes
.map! { |lazy| force(lazy) }
.keep_if { |forced| @type.authorized?(forced, @context) }
end
end
def after_resolve(value:, context:, **rest)
return value if value.is_a?(GraphQL::Execution::Execute::Skip)
if @field.connection?
redact_connection(value, context)
elsif @field.type.list?
redact_list(value.to_a, context) unless value.nil?
end
value
end
def redact_connection(conn, context)
redactor = Redactor.new(@field.type.unwrap.node_type, context)
return unless redactor.active?
conn.redactor = redactor if conn.respond_to?(:redactor=)
end
def redact_list(list, context)
redactor = Redactor.new(@field.type.unwrap, context)
redactor.redact(list) if redactor.active?
end
end
end
end
end
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