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https://github.com/openfoodfoundation/openfoodnetwork
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ca4de40fa2
This change is introduced in the adjustments updates from Spree 2.2 and used heavily in new scopes and methods (not included here).
94 lines
3.6 KiB
Ruby
94 lines
3.6 KiB
Ruby
# frozen_string_literal: true
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module Spree
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module Core
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module CalculatedAdjustments
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def self.included(klass)
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klass.class_eval do
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has_one :calculator, class_name: "Spree::Calculator", as: :calculable, dependent: :destroy
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accepts_nested_attributes_for :calculator
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validates :calculator, presence: true
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def self.calculators
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spree_calculators.__send__(model_name_without_spree_namespace)
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end
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def calculator_type
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calculator.class.to_s if calculator
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end
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def calculator_type=(calculator_type)
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klass = calculator_type.constantize if calculator_type
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self.calculator = klass.new if klass && !calculator.is_a?(klass)
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end
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# Creates a new adjustment for the target object
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# (which is any class that has_many :adjustments) and sets amount based on the
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# calculator as applied to the given calculable (Order, LineItems[], Shipment, etc.)
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# By default the adjustment will not be considered mandatory
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def create_adjustment(label, target, calculable, mandatory = false, state = "closed")
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# Adjustment calculations done on Spree::Shipment objects MUST
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# be done on their to_package'd variants instead
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# It's only the package that contains the correct information.
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# See https://github.com/spree/spree_active_shipping/pull/96 et. al
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old_calculable = calculable
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calculable = calculable.to_package if calculable.is_a?(Spree::Shipment)
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amount = compute_amount(calculable)
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return if amount.zero? && !mandatory
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target.adjustments.create(
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amount: amount,
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source: old_calculable,
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originator: self,
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order: order_object_for(target),
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label: label,
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mandatory: mandatory,
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state: state
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)
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end
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# Updates the amount of the adjustment using our Calculator and
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# calling the +compute+ method with the +calculable+
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# referenced passed to the method.
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def update_adjustment(adjustment, calculable)
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# Adjustment calculations done on Spree::Shipment objects MUST
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# be done on their to_package'd variants instead
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# It's only the package that contains the correct information.
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# See https://github.com/spree/spree_active_shipping/pull/96 et. al
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calculable = calculable.to_package if calculable.is_a?(Spree::Shipment)
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adjustment.update_column(:amount, compute_amount(calculable))
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end
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# Calculate the amount to be used when creating an adjustment
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# NOTE: May be overriden by classes where this module is included into.
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# Such as Spree::Promotion::Action::CreateAdjustment.
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def compute_amount(calculable)
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calculator.compute(calculable)
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end
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def self.model_name_without_spree_namespace
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to_s.tableize.gsub('/', '_').sub('spree_', '')
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end
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private_class_method :model_name_without_spree_namespace
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def self.spree_calculators
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Rails.application.config.spree.calculators
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end
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private_class_method :spree_calculators
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private
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def order_object_for(target)
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# Temporary method for adjustments transition.
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if target.is_a? Spree::Order
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target
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elsif target.respond_to?(:order)
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target.order
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end
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end
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end
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end
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end
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end
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end
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