[Tickets #3700] Proforma - invoice manager

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Ticket URL: http://bugs.horde.org/ticket/?id=3700
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 Ticket             | 3700
 Updated By         | thomas at gelf.net
 Summary            | Proforma - invoice manager
 Queue              | Horde Base
 Version            | HEAD
 State              | Feedback
 Priority           | 1. Low
 Type               | Enhancement
 Owners             | 
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thomas at gelf.net (2006-03-30 03:57) wrote:

Great work!!!

Some comments (Please don't take them too serious if I'm totally wrong on
some points. I installed proforma yesterday evening and just played around
a
little bit - but I didn't dig deep enough to be sure about what I'm
writing):

- using AJAX for tax calculation while updating fields seems a useless
over-
  head - it should be worth the effort to write some client-side JavaScript
to do
  this job. While finally saving an invoice I wouldn't trust these values
and do
  the same calculation once again on server side.

  This may be seen as a duplication of code (same thing in PHP and JS) -
  but it saves us a lot of HTTP traffic. Especially if you're going to use
HTTPS
  this shouldn't be underestimated.

- show tax sums only for taxes used in the current invoice (there are
countries
  with 5 and more tax variants - and only one of them is used in probably
99%
  of all invoices)

- what will the SQL layout look like? I would suggest something like:

  * invoices: containing customer details (address... - it's important to
    duplicate them and not to save just an ID), billing date, ctime, mtime,
    document type (offer, invoice, proforma invoice...), state (sent,
payed)

  * invoice details: invoice id, amount, price, tax, currency
  
I'm in a hurry right now - but maybe this weekend I can find some time to
go on playing with "proforma" ;-)

Kind regards,
Thomas Gelf

NB: Please keep this ticket up to date!