#-- copyright
# OpenProject is a project management system.
# Copyright (C) 2012-2017 the OpenProject Foundation (OPF)
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License version 3.
#
# OpenProject is a fork of ChiliProject, which is a fork of Redmine. The copyright follows:
# Copyright (C) 2006-2017 Jean-Philippe Lang
# Copyright (C) 2010-2013 the ChiliProject Team
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
#
# See doc/COPYRIGHT.rdoc for more details.
#++

module API
  module V3
    module Relations
      module RelationsHelper
        def filter_attributes(relation)
          relation
            .attributes
            .with_indifferent_access
            .reject { |_key, value| value.blank? }
        end

        def representer
          ::API::V3::Relations::RelationRepresenter
        end

        def project_id_for_relation(id)
          relations = Relation.table_name
          work_packages = WorkPackage.table_name

          Relation
            .joins(:from)
            .where("#{relations}.id" => id)
            .pluck("#{work_packages}.project_id")
            .first
        end

        def to_i_or_nil(string)
          string ? string.to_i : nil
        end
      end
    end
  end
end