Update restock levels to match order levels

[pulkitsinghal]

@DivisionVapor wants this done

[pulkitsinghal]

Some background:

1. reorder_point is the level stock must get to before Vend identifies it as 'low stock'

2. restock_level is the amount of stock to automatically reorder

3. Right now
 if product.inventory.restock_level==0
 it is treated as a discontinued product

If a generate order report is about to order 30 more units of a product then the restock_level should be set to 30 and the reorder_point should be 29 in vend via an API call.

This feature should be optional, meaning someone has to say they want it in the original cmd-line prompts when starting the script, otherwise it should not kick-in.

[pulkitsinghal]

• https://support.vendhq.com/hc/en-us/articles/201379120-Stock-reorder-point-and-reorder-count
• https://developers.vendhq.com/documentation/api/0.x/products.html#update
  • I don't think you can send a simple diff as an update, I think one must GET the entire product data first, edit it and then send it back ... otherwise things get nuked.

[pulkitsinghal]

@DivisionVapor and @MeghaY - please make sure to decide if any extra intelligence is required when the stock being ordered based on sales data is 1 or 0 ... because that means that the product gets set to:
a) reorder_point: 0 and restock_level: 1
b) reorder_point: -1 and restock_level: 0