Redmine

      when 'all'

        true

      when 'default'

      when 'own'

        self.author == user || user.is_or_belongs_to?(assigned_to)

      else

      roles = roles_for_project(context)

      return false unless roles

        (context.is_public? || role.member?) &&

        role.allowed_to?(action) &&

        (block_given? ? yield(role, self) : true)

      # authorize if user has at least one role that has this permission

      roles = memberships.collect {|m| m.roles}.flatten.uniq

      roles << (self.logged? ? Role.non_member : Role.anonymous)

        role.allowed_to?(action) &&

        (block_given? ? yield(role, self) : true)

      }