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import datetime
from django.views.generic.detail import DetailView
from django.template.loader import render_to_string
from django.http import HttpResponse
from django.conf import settings
from weasyprint import HTML, CSS
from .models import Invoice, InvoiceItem
class MonthlyInvoiceView(DetailView):
model = Invoice
template_name = "admin/income/monthly.html"
slug_field = "slug"
def get_context_data(self, **kwargs):
context = super(MonthlyInvoiceView, self).get_context_data(**kwargs)
context['object_list'] = InvoiceItem.objects.filter(time_start__range=[self.object.date_start, self.object.date_end])
total_time = []
for item in context['object_list']:
total_time.append(item.rounded_total)
duration = (sum(total_time, datetime.timedelta()))
hours = duration.total_seconds() // 3600
context['total_hours'] = hours
context['total_billed'] = int(hours * 100)
context['invoice_number'] = self.object.id+21
return context
class DownloadMonthlyInvoiceView(MonthlyInvoiceView):
model = Invoice
slug_field = "slug"
def get(self, *args, **kwargs):
import logging
logger = logging.getLogger('weasyprint')
logger.addHandler(logging.FileHandler('weasyprint.log'))
self.object = self.get_object() # assign the object to the view
c = {'object': self.object}
t = render_to_string('details/invoice.html', c).encode('utf-8')
html = HTML(string=t, base_url=self.request.build_absolute_uri())
pdf = html.write_pdf(stylesheets=[CSS(settings.MEDIA_ROOT + 'site/media/pdf_gen.css')], presentational_hints=True)
response = HttpResponse(pdf, content_type='application/pdf')
response['Content-Disposition'] = 'inline; filename="invoice.pdf"'
return response
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