Module: Klarna::Checkout::Validations::OrderValidations

Included in:
Order
Defined in:
lib/klarna/checkout/validations/order_validations.rb

Constant Summary collapse

REQUIRED_ORDER_KEYS = 
%i[purchase_country purchase_currency locale order_amount order_tax_amount].freeze
REQUIRED_ITEM_KEYS = 
%i[type name quantity unit_price tax_rate total_amount total_tax_amount].freeze

Instance Method Summary collapse

Instance Method Details

#amount_validation ⇒ Object

  1. order_amount == sum of all items total_amounts

Raises:



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# File 'lib/klarna/checkout/validations/order_validations.rb', line 30

def amount_validation
  return if @items.map { |i| i[:total_amount].to_i }.sum == @header[:order_amount].to_i

  raise Klarna::Checkout::Errors::OrderValidationError.new(
    'inconsistent_values', 'order_amount_not_matching_total_amounts'
  )
end

#header_keys_existance ⇒ Object

Raises:



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# File 'lib/klarna/checkout/validations/order_validations.rb', line 10

def header_keys_existance
  missing_keys = REQUIRED_ORDER_KEYS - @header.keys
  return true if missing_keys.empty?

  raise Klarna::Checkout::Errors::OrderValidationError.new(missing_keys, 'missing_order_keys')
end

#item_keys_existance ⇒ Object 



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# File 'lib/klarna/checkout/validations/order_validations.rb', line 17

def item_keys_existance
  @items.map(&:keys).each do |item_keys|
    missing_keys = REQUIRED_ITEM_KEYS - item_keys

    unless missing_keys.empty?
      raise Klarna::Checkout::Errors::OrderValidationError.new(missing_keys, 'missing_item_keys')
    end
  end

  true
end

#tax_amount_validation ⇒ Object

  1. order_tax_amount == sum of all items total_tax_amounts

Raises:



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# File 'lib/klarna/checkout/validations/order_validations.rb', line 39

def tax_amount_validation
  return if @items.map { |i| i[:total_tax_amount].to_i }.sum == @header[:order_tax_amount].to_i

  raise Klarna::Checkout::Errors::OrderValidationError.new(
    'inconsistent_values', 'total_tax_amount_not_matching_total_tax_amounts'
  )
end

#total_amount_validation ⇒ Object

  1. loop through all items

    -> unit_price * quantity == total_amount



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# File 'lib/klarna/checkout/validations/order_validations.rb', line 48

def total_amount_validation
  @items.each do |i|
    next if i[:quantity].to_i * (i[:unit_price].to_i - i[:total_discount_amount].to_i) == i[:total_amount].to_i

    raise Klarna::Checkout::Errors::OrderValidationError.new(
      'inconsistent_order_line_totals', 'total_line_amount_not_matching_qty_times_unit_price'
    )
  end
end

#total_tax_amount_validation ⇒ Object

  1. loop through all items

    -> total_tax_amount / (total_amount - total_tax_amount) == tax_rate * 10_000



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# File 'lib/klarna/checkout/validations/order_validations.rb', line 59

def total_tax_amount_validation
  @items.each do |i|
    next if i[:total_tax_amount].to_i * 100 / (i[:total_amount].to_i - i[:total_tax_amount].to_i) == i[:tax_rate].to_i / 100

    raise Klarna::Checkout::Errors::OrderValidationError.new(
      'inconsistent_order_line_total_tax', 'line_total_tax_amount_not_matching_tax_rate'
    )
  end
end