from django.core.management.base import BaseCommand from django.core.files import File from django.conf import settings from shop.pdf import generate_pdf_letter from shop.email import send_invoice_email from shop.models import Order, Invoice from time import sleep class Command(BaseCommand): args = 'none' help = 'Send out invoices that have not been sent yet' def handle(self, *args, **options): self.stdout.write('Invoice worker running...') while True: # check if we need to generate any invoices for order in Order.objects.filter(paid=True, invoice__isnull=True): # generate invoice for this Order Invoice.objects.create(order=order) self.stdout.write('Generated Invoice object for order %s' % order) # check if we need to generate any pdf invoices for invoice in Invoice.objects.filter(pdf__isnull=True): # put the dict with data for the pdf together formatdict = { 'invoice': invoice, } # generate the pdf try: pdffile = generate_pdf_letter( filename=invoice.filename, template='invoice.html', formatdict=formatdict, ) self.stdout.write('Generated pdf for invoice %s' % invoice) except Exception as E: self.stdout.write('ERROR: Unable to generate PDF file for invoice #%s. Error: %s' % (invoice.pk, E)) continue # so, do we have a pdf? if not pdffile: self.stdout.write('ERROR: Unable to generate PDF file for invoice #%s' % invoice.pk) continue # update invoice object with the file invoice.pdf.save(invoice.filename, File(pdffile)) invoice.save() # check if we need to send out any invoices (only where pdf has been generated) for invoice in Invoice.objects.filter(sent_to_customer=False).exclude(pdf=''): # send the email if send_invoice_email(invoice=invoice): self.stdout.write('OK: Invoice email sent to %s' % invoice.order.user.email) invoice.sent_to_customer=True invoice.save() else: self.stdout.write('ERROR: Unable to send invoice email for order %s to %s' % (invoice.order.pk, invoice.order.user.email)) # pause for a bit sleep(60)