[ic] Discount Specifications

[Marty Tennison]

Starting a new thread for discount specs....

I just got done implementing this in our system so it's fresh in my mind.  If 
this is something anyone is interested in I'll be happy to elaborate and/or 
collaborate on the spec and share my experiences. 

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Discounts have 3 major parts. 
  1) Discounts
  2) Rules
  3) Actions


DISCOUNTS:
Discounts have one or more rules.
Discounts have one or more actions.
Discounts can be active or inactive


DISCOUNT_RULES:
Rules evaluate conditions and return 1 or 0  (true or false)
Rules have a type, operator, value. 
Rule types are actually modules (subs) that can be plugged in as new rules are 
needed
Rule types: (ideas)
  1) Subtotal including discounts
  2) Subtotal excluding discounts
  3) nitems in cart
  4) date
  5) Weight of all items in cart
  6) username
  7) sku 
  8) cart contains X of item Y
  9) was discount code entered by user (make this a private coupon)
Rule operators:
  1) ==, !=, <=, >=, <, >, eq, ne, ge, le, gt, lt, <user defined input>
Rule Values:
  1)<user defined input> (this is what we test against)
Rules chain unless the rule returns false
If all rules return true then the discount actions are applied.


DISCOUNT_ACTIONS:
Actions have a type, operator and value
Action types are actually modules (subs) that can be plugged in as new actions 
are needed
Action types: (ideas)
  1) Percentage of subtotal
  2) Fixed amount
  3) Free Shipping
  4) Discount sku by fixed amount
  5) Discount sku by percentage
  6) Discount sku by (amt * qty)
  7) Display message
  8) Log something
  9) Deactivate discount (make discount a single use coupon)
Action Operator:
  1) (only used to enter SKU if needed for item 4,5,6 above)
Action Values:
  <user defined input>  ie: .65, 5 etc...


DISCOUNT_LOG:
  All redeemed discounts should be logged to a file for reporting.
  Logged fields should be 
  1) Discount ID
  2) Username
  3) Date
  4) Amount
  5) Order number


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Marty Tennison                                                Drip Depot Inc 
web: www.dripdepot.com
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