Add Scheduled Invoices to GnuCash

I have been using GnuCash for many years, and I use it exclusively for my Linux consulting business. The most important item on the wish-list for my business is recurring/scheduled invoices, and I am interested in funding development: [login to view URL] I have considered implementing the feature myself, but do not have the time to do; at one point I even looked for a different accounting package, but I like GnuCash so much I would prefer to stay with it if a developer willing to take on the task. Most importantly, I would like the the feature accepted into the GnuCash development tree for downstream release. Thus, it is important that the implementation fit the GnuCash development philosophy. Ultimately this is the simple process I am looking for and I am open if you have an idea to reasonably extend the implementation's flexibility: 1. An "Invoice Template" repository. The Invoice Template repository would allow me to write invoice templates for future scheduling. The template must have some variable assignment that can be replaced when the template is scheduled. For example, an invoice line item might look like: Date Desc Qty Cost $DATE_M Hosting for $VAR_WEBSITE 1 $VAR_HOSTING_PRICE The date format would re-use the hotkey date assignments listed here: [login to view URL] Such that $DATE_M would substitute as the first date of the month. 2. Binding a scheduled invoice to a customer. A. Select a template defined in #1 for scheduling B. Set the recurrency schedule (daily/weekly/monthly/yearly/whatever is currently supported) C. Select the customer to bind the scheduled invoice. D. Define any custom values: VAR_WEBSITE=[login to view URL] VAR_HOSTING_PRICE=5000.00 A multi-line text-box with manual-input would be fine for this segment, though a more elegant interface which checks the template for variables and prompts for values would be great. I envision updating the existing scheduled transaction interface to support this, however, it is my hope that a GnuCash developer will know the best way and location to implement this. 3. Scheduled-invoice Generation I am open to ideas here. Auto-generating invoices that are due for generation would suffice for my purposes.