Category Based Discount (OpenCart Addon)

Supported OpenCart Versions:
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v1.2.6, v1.2.7, v1.2.8, v1.2.9, v1.3.0, v1.3.1, v1.3.2, v1.3.3, v1.3.4, v1.4.0, v1.4.4, v1.4.6, v1.4.7, v1.4.8


What does it do:
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This contrib adds the ability to give customers a discount if they purchase a specific quantity of items from a single category. Either based on unique items or bulk quantity.


Main features:
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  * Discount by % or static
  * Configurable qty of products needed before discount applies
  * Configurable setting for if those products must be unique
  * Individual status options
  * Dynamically expands for additional categories
  * Separate discounts for each category
  * Multiple discounts per category


How to install it:
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1) Unzip and upload the contents of the upload folder to the root directory of your OpenCart installation.
-- No files are overwritten.
2) From the admin menu, go to 'Admin->Users->User Groups'. Edit Top Administrator.
3) Find and check the entries for any unchecked files in both modify and access. save.
4) From the admin menu, go to 'Extensions->Order Total'.
5) Install the module, and click edit to configure.
6) Adjust the Sort Order to where you want it to be. You'd certainly want it to apply before the final `Total` is calculated, but after subtotal. Try 2.


How it Works:
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1. Lets say you want to give a discount to a customer if he buys 5 or more items in one category.
2. If he puts only 4 in his cart and checks out, there is no discount
3. If unique is unchecked, and he puts 5 in his cart and checks out, a discount is applied
4. If unique is checked, and the customer puts 2 of one item and 3 of another, there is no discount.
5. If unique is checked, and the customer puts in 5 different items, a discount is applied.

You can give different discounts at different amounts as well per category.
Example:
3:10%, 5:15%, 20:30%, 30:50.00
So if the customer buys 3-4 items from one category, he gets 10% off
if he buys 5 from that category, he gets 15% off
etc

Notes:
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Discount is only applied at checkout. It is up to you to advertise the discounts using the category description.