openproject/app/services/base_services/delete.rb

#-- 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 BaseServices
  class Delete
    include ::Shared::ServiceContext
    include ::Concerns::Contracted

    attr_accessor :user,
                  :model,
                  :contract_class

    def initialize(user:, model:, contract_class: nil)
      self.user = user
      self.model = model
      self.contract_class = contract_class || default_contract
    end

    def call
      in_context(false) do
        delete
      end
    end

    def default_contract
      "#{model.class.name.demodulize.pluralize}::DeleteContract".constantize
    end

    protected

    def delete
      result, errors = validate_and_yield(model, user) do
        model.destroy
      end

      ServiceResult.new(success: result, result: model, errors: errors)
    end
  end
end