[spree-user] Re: Strategy for Spree Cloud Tax Extension

On Friday, December 7, 2012 4:31:08 PM UTC-5, Jet wrote:

I am attempting to write a Spree extension for TaxCloud, spree_cloud_tax:

https://github.com/bluehandtalking/spree_cloud_tax.git

At this point I have done the easy part, getting a lookup from TaxCloud,
and the calculator taxing items in the cart.

However, could really use some pointers on the next steps, as I
have never attempted an extension before, no in-depth familiarity
with Spree.

Class Transaction is the workhorse of the tax_cloud gem,
which spree_cloud_tax utilizes.

lookup, authorized, capture, authorized_with capture,
returned

1) I need to create a table to save authorized transactions,
transitional lookups (unless this could be done in a session
variable?)
Should an order belong_to a transaction?

2) Since the purpose of TaxCloud is to provide a unique tax
rate given the order shipping address, is the TaxRate table
still the place to store the tax rate, and if so what would the
Cardinality be between them?

3) After an order is authorized through a payment gateway,
there need to be a callback for @transaction.authorized
Would that need to be set up within the state machine,
and what would that look like? Similar to below

order_decorator.rb

Spree::Order.state_machine.after_transition :to => 'complete',
:do => "{
transaction.order_id = 100

transaction.authorized_with_capture }"

(would need to be able to set order_id, and how is scope available here?)



Thanks!

Jet

oh, and if anyone has already worked out the strategy, etc for this would
be great if they shared!