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https://github.com/openfoodfoundation/openfoodnetwork
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90 lines
3.2 KiB
Ruby
90 lines
3.2 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, adjustable, mandatory = false, state = "closed")
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amount = compute_amount(adjustable)
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return if amount.zero? && !mandatory
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adjustment_attributes = {
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amount: amount,
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originator: self,
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order: order_object_for(adjustable),
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label: label,
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mandatory: mandatory,
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state: state,
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included: tax_included?(self, adjustable)
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}
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if adjustable.respond_to?(:adjustments)
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adjustable.adjustments.create(adjustment_attributes)
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else
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adjustable.create_adjustment(adjustment_attributes)
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end
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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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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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# Used for setting the #included boolean on tax adjustments. This will be removed in a
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# later step, as the responsibility for creating all adjustments related to tax will be
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# moved into the Spree::TaxRate class.
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def tax_included?(originator, target)
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originator.is_a?(Spree::TaxRate) &&
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originator.included_in_price &&
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originator.default_zone_or_zone_match?(order_object_for(target))
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end
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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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