#-- copyright
# OpenProject is a project management system.
# Copyright (C) 2012-2018 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 docs/COPYRIGHT.rdoc for more details.
#++

module API
  module V3
    module WorkPackages
      class ParseParamsService
        def initialize(user)
          @current_user = user
        end

        def call(request_body)
          return {} unless request_body

          parse_attributes(request_body)
        end

        private

        attr_accessor :current_user

        def parse_attributes(request_body)
          struct = ParsingStruct.new

          ::API::V3::WorkPackages::WorkPackagePayloadRepresenter
            .create_class(struct)
            .new(struct, current_user: current_user)
            .from_hash(Hash(request_body))
            .to_h
            .reverse_merge(lock_version: nil)
        end

        class ParsingStruct < OpenStruct
          def available_custom_fields
            @available_custom_fields ||= WorkPackageCustomField.all.to_a
          end
        end
      end
    end
  end
end