nk20/apps/treasury/views.py

175 lines
5.4 KiB
Python

# Copyright (C) 2018-2020 by BDE ENS Paris-Saclay
# SPDX-License-Identifier: GPL-3.0-or-later
import os
import shutil
import subprocess
from tempfile import mkdtemp
from crispy_forms.helper import FormHelper
from django.contrib.auth.mixins import LoginRequiredMixin
from django.db.models import Q
from django.http import HttpResponse
from django.template.loader import render_to_string
from django.urls import reverse_lazy
from django.views.generic import CreateView, UpdateView
from django.views.generic.base import View
from django_tables2 import SingleTableView
from note_kfet.settings.base import BASE_DIR
from .forms import InvoiceForm, ProductFormSet, ProductFormSetHelper
from .models import Invoice, Product
from .tables import InvoiceTable
class InvoiceCreateView(LoginRequiredMixin, CreateView):
"""
Create Invoice
"""
model = Invoice
form_class = InvoiceForm
def get_context_data(self, **kwargs):
context = super().get_context_data(**kwargs)
form = context['form']
form.helper = FormHelper()
form.helper.form_tag = False
form_set = ProductFormSet(instance=form.instance)
context['formset'] = form_set
context['helper'] = ProductFormSetHelper()
context['no_cache'] = True
return context
def form_valid(self, form):
ret = super().form_valid(form)
kwargs = {}
for key in self.request.POST:
value = self.request.POST[key]
if key.endswith("amount"):
kwargs[key] = str(int(100 * float(value)))
else:
kwargs[key] = value
formset = ProductFormSet(kwargs, instance=form.instance)
if formset.is_valid():
for f in formset:
if f.is_valid() and f.instance.designation:
f.save()
f.instance.save()
else:
f.instance = None
return ret
def get_success_url(self):
return reverse_lazy('treasury:invoice')
class InvoiceListView(LoginRequiredMixin, SingleTableView):
"""
List existing Invoices
"""
model = Invoice
table_class = InvoiceTable
class InvoiceUpdateView(LoginRequiredMixin, UpdateView):
"""
Create Invoice
"""
model = Invoice
form_class = InvoiceForm
def get_context_data(self, **kwargs):
context = super().get_context_data(**kwargs)
form = context['form']
form.helper = FormHelper()
form.helper.form_tag = False
form_set = ProductFormSet(instance=form.instance)
context['formset'] = form_set
context['helper'] = ProductFormSetHelper()
context['no_cache'] = True
return context
def form_valid(self, form):
ret = super().form_valid(form)
kwargs = {}
for key in self.request.POST:
value = self.request.POST[key]
if key.endswith("amount"):
kwargs[key] = str(int(100 * float(value)))
else:
kwargs[key] = value
formset = ProductFormSet(kwargs, instance=form.instance)
saved = []
print(formset.errors)
if formset.is_valid():
for f in formset:
if f.is_valid() and f.instance.designation:
if type(f.instance.pk) == 'number' and f.instance.pk <= 0:
f.instance.pk = None
f.save()
f.instance.save()
saved.append(f.instance.pk)
else:
f.instance = None
Product.objects.filter(~Q(pk__in=saved), invoice=form.instance).delete()
return ret
def get_success_url(self):
return reverse_lazy('treasury:invoice')
class InvoiceRenderView(LoginRequiredMixin, View):
"""
Render Invoice as generated PDF
"""
def get(self, request, **kwargs):
pk = kwargs["pk"]
invoice = Invoice.objects.get(pk=pk)
products = Product.objects.filter(invoice=invoice).all()
invoice.description = invoice.description.replace("\n", "\\newline\n")
invoice.address = invoice.address.replace("\n", "\\newline\n")
tex = render_to_string("treasury/invoice_sample.tex", dict(obj=invoice, products=products))
try:
os.mkdir(BASE_DIR + "/tmp")
except FileExistsError:
pass
tmp_dir = mkdtemp(prefix=BASE_DIR + "/tmp/")
try:
with open("{}/invoice-{:d}.tex".format(tmp_dir, pk), "wb") as f:
f.write(tex.encode("UTF-8"))
del tex
for _ in range(2):
error = subprocess.Popen(
["pdflatex", "invoice-{}.tex".format(pk)],
cwd=tmp_dir,
stdin=open(os.devnull, "r"),
stderr=open(os.devnull, "wb"),
stdout=open(os.devnull, "wb")
).wait()
if error:
raise IOError("An error attempted while generating a invoice (code=" + str(error) + ")")
pdf = open("{}/invoice-{}.pdf".format(tmp_dir, pk), 'rb').read()
response = HttpResponse(pdf, content_type="application/pdf")
response['Content-Disposition'] = "inline;filename=invoice-{:d}.pdf".format(pk)
except IOError as e:
raise e
finally:
shutil.rmtree(tmp_dir)
return response