Allows creating discounts for products / orders.

• Discount by various criteria, including:
• Time
• User group
• Product/Category
• Number of uses
• Order value
• Shipping zone
• Coupon codes
• Gift voucher products
• Shipping discount

Discounts can be applied to individual products, cart subtotal, or shipping. Discounts can be globally enabled/disabled.

• Shop Module + its requirements

• Install code to your SilverStripe root directory.

via composer:

	composer require burnbright/silverstripe-shop-discount dev-master

If you are using the stepped checkout, add the CheckoutStep_Discount checkout step:

CheckoutPage:
	steps:
		'contactdetails' : 'CheckoutStep_ContactDetails'
		'shippingaddress' : 'CheckoutStep_Address'
		'billingaddress' : 'CheckoutStep_Address'
		'shippingmethod' : 'CheckoutStep_ShippingMethod'
		'discount' : 'CheckoutStep_Discount' #here!
		'paymentmethod' : 'CheckoutStep_PaymentMethod'
		'summary' : 'CheckoutStep_Summary'

If you would like to display the coupon form seperately to the checkout form, apply the following extension. This will make CouponForm available in the checkout template:

CheckoutPage_Controller:
  extensions:
    - CouponFormCheckoutDecorator

Add the OrderDiscountModifier modifier to your order modifiers yaml config:

Order:
	modifiers:
		- Blah
		- OrderDiscountModifier #here!
		- Blah

Extend Product and/or ProductVariation with the SpecificPricingExtension to introduce a pricing table for each product. This allows admins to set prices according to things like, date, and membership group.

Configure as follows:

Product:
  extensions:
    - SpecificPricingExtension
ProductVariation:
  extensions:
    - SpecificPricingExtension

OrderCoupon has become a subclass of Discount, so if your existing database contains OrderCoupon, it might be best to rename it to Discount before running dev/build?flush=1.