nk20/apps/treasury/views.py

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# Copyright (C) 2018-2020 by BDE ENS Paris-Saclay
# SPDX-License-Identifier: GPL-3.0-or-later
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import os
import shutil
import subprocess
from tempfile import mkdtemp
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from crispy_forms.helper import FormHelper
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from django.contrib.auth.mixins import LoginRequiredMixin
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from django.db.models import Q
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from django.http import HttpResponse
from django.template.loader import render_to_string
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from django.urls import reverse_lazy
from django.views.generic import CreateView, UpdateView
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from django.views.generic.base import View
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from django_tables2 import SingleTableView
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from note_kfet.settings.base import BASE_DIR
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from .forms import InvoiceForm, ProductFormSet, ProductFormSetHelper
from .models import Invoice, Product
from .tables import InvoiceTable
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class InvoiceCreateView(LoginRequiredMixin, CreateView):
"""
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Create Invoice
"""
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model = Invoice
form_class = InvoiceForm
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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]
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if key.endswith("amount") and value:
kwargs[key] = str(int(100 * float(value)))
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elif value:
kwargs[key] = value
formset = ProductFormSet(kwargs, instance=form.instance)
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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):
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return reverse_lazy('treasury:invoice')
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class InvoiceListView(LoginRequiredMixin, SingleTableView):
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"""
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List existing Invoices
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"""
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model = Invoice
table_class = InvoiceTable
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class InvoiceUpdateView(LoginRequiredMixin, UpdateView):
"""
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Create Invoice
"""
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model = Invoice
form_class = InvoiceForm
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def get_context_data(self, **kwargs):
context = super().get_context_data(**kwargs)
form = context['form']
form.helper = FormHelper()
form.helper.form_tag = False
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form.fields['date'].initial = form.instance.date
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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]
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if key.endswith("amount") and value:
kwargs[key] = str(int(100 * float(value)))
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elif value:
kwargs[key] = value
formset = ProductFormSet(kwargs, instance=form.instance)
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saved = []
if formset.is_valid():
for f in formset:
if f.is_valid() and f.instance.designation:
f.save()
f.instance.save()
saved.append(f.instance.pk)
else:
f.instance = None
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Product.objects.filter(~Q(pk__in=saved), invoice=form.instance).delete()
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return ret
def get_success_url(self):
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return reverse_lazy('treasury:invoice')
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class InvoiceRenderView(LoginRequiredMixin, View):
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"""
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Render Invoice as generated PDF
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"""
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def get(self, request, **kwargs):
pk = kwargs["pk"]
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invoice = Invoice.objects.get(pk=pk)
products = Product.objects.filter(invoice=invoice).all()
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invoice.place = "Cachan"
invoice.my_name = "BDE ENS Cachan"
invoice.my_address_street = "61 avenue du Président Wilson"
invoice.my_city = "94230 Cachan"
invoice.bank_code = 30003
invoice.desk_code = 3894
invoice.account_number = 37280662
invoice.rib_key = 14
invoice.bic = "SOGEFRPP"
invoice.description = invoice.description.replace("\r", "").replace("\n", "\\\\ ")
invoice.address = invoice.address.replace("\r", "").replace("\n", "\\\\ ")
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tex = render_to_string("treasury/invoice_sample.tex", dict(obj=invoice, products=products))
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try:
os.mkdir(BASE_DIR + "/tmp")
except FileExistsError:
pass
tmp_dir = mkdtemp(prefix=BASE_DIR + "/tmp/")
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try:
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with open("{}/invoice-{:d}.tex".format(tmp_dir, pk), "wb") as f:
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f.write(tex.encode("UTF-8"))
del tex
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for _ in range(2):
error = subprocess.Popen(
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["pdflatex", "invoice-{}.tex".format(pk)],
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cwd=tmp_dir,
).wait()
if error:
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raise IOError("An error attempted while generating a invoice (code=" + str(error) + ")")
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pdf = open("{}/invoice-{}.pdf".format(tmp_dir, pk), 'rb').read()
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response = HttpResponse(pdf, content_type="application/pdf")
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response['Content-Disposition'] = "inline;filename=invoice-{:d}.pdf".format(pk)
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except IOError as e:
raise e
finally:
shutil.rmtree(tmp_dir)
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return response