openproject/lib/global_roles/role_patch.rb

module GlobalRoles
  module RolePatch
    def self.included(base)
      base.send(:include, InstanceMethods)
      base.send(:extend, ClassMethods)


      base.class_eval do
        scopes[:givable] = lambda do |parent_scope, *args|
                   givable_options = { :conditions => "builtin = 0 AND type = 'Role'", :order => 'position'}
                   ActiveRecord::NamedScope::Scope.new(parent_scope, givable_options)
        end

        class << self
          alias_method :find_all_givable_without_no_global_roles, :find_all_givable unless method_defined?(:find_all_givable_without_no_global_roles)
          alias_method :find_all_givable, :find_all_givable_with_no_global_roles
        end

        alias_method_chain :setable_permissions, :no_global_roles
      end
    end

    module ClassMethods
      def find_all_givable_with_no_global_roles
        find(:all, :conditions => {:builtin => 0, :type => 'Role'}, :order => 'position')
      end
    end

    module InstanceMethods
      def setable_permissions_with_no_global_roles
        setable_permissions = setable_permissions_without_no_global_roles
        setable_permissions -= Redmine::AccessControl.global_permissions
        setable_permissions
      end
    end
  end
end

Role.send(:include, GlobalRoles::RolePatch)