Module: Spree::TaxRateDecorator

Defined in:
app/models/spree/tax_rate_decorator.rb

Instance Method Summary collapse

Instance Method Details

#adjust_order_level_adjustments(order) ⇒ Object 



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# File 'app/models/spree/tax_rate_decorator.rb', line 3

def adjust_order_level_adjustments(order)
  return unless order.tax_address.nil? || zone.include?(order.tax_address)

  order_adjustments = order.adjustments.eligible.non_tax
                          .where(adjustable_type: 'Spree::Order')

  total_tax_amount = 0

  order_adjustments.each do |adjustment|
    tax_amount = calculate_tax_for_adjustment(adjustment)
    total_tax_amount += tax_amount if tax_amount
  end

  return if total_tax_amount.round(0).zero?

  existing_tax = find_existing_tax_adjustment_for_order(order)

  if existing_tax
    update_tax_adjustment(existing_tax, total_tax_amount)
  else
    create_tax_adjustment(order, total_tax_amount)
  end
end

#calculate_tax_for_adjustment(adjustment) ⇒ Object 



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# File 'app/models/spree/tax_rate_decorator.rb', line 27

def calculate_tax_for_adjustment(adjustment)
  tax_category = get_tax_category_for_adjustment(adjustment)
  return nil unless tax_category
  return nil unless tax_category == self.tax_category
  return nil if adjustment.amount.zero?

  pre_tax_amount = adjustment.amount / (1 + amount)
  tax_amount = adjustment.amount - pre_tax_amount

  tax_amount
end

#create_tax_adjustment(order, tax_amount) ⇒ Object 



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# File 'app/models/spree/tax_rate_decorator.rb', line 67

def create_tax_adjustment(order, tax_amount)
  order.adjustments.create!(
    adjustable_type: 'Spree::Order',
    adjustable_id: order.id,
    amount: tax_amount.round(0),
    included: true,
    label: label,
    order: order,
    state: 'closed',
    source_type: 'Spree::TaxRate',
    source_id: id
  )
end

#find_existing_tax_adjustment_for_order(order) ⇒ Object 



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# File 'app/models/spree/tax_rate_decorator.rb', line 59

def find_existing_tax_adjustment_for_order(order)
  order.adjustments.tax.find_by(
    source_type: 'Spree::TaxRate',
    source_id: id,
    adjustable_type: 'Spree::Order'
  )
end

#get_tax_category_for_adjustment(adjustment) ⇒ Object 



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# File 'app/models/spree/tax_rate_decorator.rb', line 39

def get_tax_category_for_adjustment(adjustment)
  source = adjustment.source
  return nil unless source

  case adjustment.source_type
  when 'Spree::PromotionAction'
    # 定額(FlatRate)など tax_category を持たない calculator もあるため、
    # respond_to? でガードして NoMethodError を避ける(try で同等)。
    source.calculator.try(:tax_category)
  when 'Spree::Calculator'
    source.try(:tax_category)
  when 'Spree::ShippingMethod'
    source.try(:tax_category)
  when 'Spree::PaymentMethod'
    source.try(:tax_category)
  else
    nil
  end
end

#update_tax_adjustment(existing_tax, tax_amount) ⇒ Object 



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# File 'app/models/spree/tax_rate_decorator.rb', line 81

def update_tax_adjustment(existing_tax, tax_amount)
  new_amount = tax_amount.round(0)
  if existing_tax.amount != new_amount
    existing_tax.update_columns(
      amount: new_amount,
      updated_at: Time.current
    )
  end
end