OpenProject is the leading open source project management software.
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openproject/app/services/concerns/contracted.rb

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#-- encoding: UTF-8
#-- 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 Concerns::Contracted
extend ActiveSupport::Concern
included do
attr_reader :contract_class
def contract_class=(cls)
unless cls <= ::ModelContract
raise ArgumentError "#{cls.name} is not an instance of ModelContract."
end
@contract_class = cls
end
private
def instantiate_contract(object, user)
contract_class.new(object, user)
end
def validate_and_save(object, user)
validate_and_yield(object, user) do
object.save
end
end
##
# Call the given block and assume object is erroneous if
# it does not return truthy
def validate_and_yield(object, user)
contract = instantiate_contract(object, user)
if !contract.validate
[false, contract.errors]
elsif !yield
[false, object.errors]
else
[true, object.errors]
end
end
def validate(object, user)
validate_and_yield(object, user) do
object.valid?
end
end
end
end