I need to customize Cart66 Professional plug-in to use multi-currency.
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What I want to ask is customizing the plug-ins considering all of bellow.
What I'm planning is to add one or two column to product information table.
One column is "currency", and possibly another is "item ID" to pair with the same product with different currency.
That means 1 product may have US$ row and EUR row, etc. in a product information table.
(Admin can add which product to show in each post/page with short code. This is a default feature of this plug-in.
We are planning to use multi-language plug-in like qTranslate or WPML, so admin can choose which short code should be in which language page.)
Also you need to consider which currency's product is in a cart when a site visitor actually pays.
Sometimes it could be possible that some products with different currencies exist in a cart.
In that case I'm assuming that we need to exchange some products to a standard currency product which is paired using newly added column information.
We need to change a few UIs. This plug-in has some place showing standard currency with product price.
This needs to be replaced with the new "currency" column information.