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109 lines
3.1 KiB
109 lines
3.1 KiB
#-- encoding: UTF-8
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#-- copyright
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# OpenProject is an open source project management software.
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# Copyright (C) 2012-2020 the OpenProject GmbH
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License version 3.
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#
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# OpenProject is a fork of ChiliProject, which is a fork of Redmine. The copyright follows:
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# Copyright (C) 2006-2017 Jean-Philippe Lang
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# Copyright (C) 2010-2013 the ChiliProject Team
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#
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# This program is free software; you can redistribute it and/or
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# modify it under the terms of the GNU General Public License
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# as published by the Free Software Foundation; either version 2
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# of the License, or (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
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#
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# See docs/COPYRIGHT.rdoc for more details.
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#++
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module Contracted
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extend ActiveSupport::Concern
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included do
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attr_reader :contract_class
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attr_accessor :contract_options
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def contract_class=(cls)
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unless cls <= ::ModelContract
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raise ArgumentError "#{cls.name} is not an instance of ModelContract."
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end
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@contract_class = cls
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end
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def changed_by_system(attributes = nil)
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@changed_by_system ||= []
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if attributes
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@changed_by_system += Array(attributes)
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end
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@changed_by_system
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end
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def change_by_system
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prior_changes = non_no_op_changes
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ret = yield
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changed_by_system(changed_compared_to(prior_changes))
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ret
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end
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private
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def instantiate_contract(object, user, options: {})
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contract_class.new(object, user, options: { changed_by_system: changed_by_system }.merge(options))
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end
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def validate_and_save(object, user, options: {})
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validate_and_yield(object, user, options: options) do
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object.save
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end
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end
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##
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# Call the given block and assume object is erroneous if
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# it does not return truthy
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def validate_and_yield(object, user, options: {})
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contract = instantiate_contract(object, user, options: options)
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if !contract.validate
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[false, contract.errors]
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elsif !yield
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[false, object.errors]
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else
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[true, object.errors]
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end
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end
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def validate(object, user, options: {})
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validate_and_yield(object, user, options: options) do
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# No object validation is necessary at this point
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# as object.valid? is already called in the contract
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true
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end
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end
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def non_no_op_changes
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model.changes.reject { |_, (old, new)| old == 0 && new.nil? }
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end
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def changed_compared_to(prior_changes)
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model.changed.select { |c| !prior_changes[c] || prior_changes[c].last != model.changes[c].last }
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end
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end
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end
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