nk20/apps/treasury/views.py

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Python
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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.core.exceptions import ValidationError
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from django.db.models import Q
from django.forms import Form
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from django.http import HttpResponse
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from django.shortcuts import redirect
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from django.template.loader import render_to_string
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from django.urls import reverse_lazy
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from django.utils.translation import gettext_lazy as _
from django.views.generic import CreateView, UpdateView, DetailView
from django.views.generic.base import View, TemplateView
from django.views.generic.edit import BaseFormView
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from django_tables2 import SingleTableView
from note.models import SpecialTransaction, NoteSpecial, Alias
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from note_kfet.settings.base import BASE_DIR
from permission.backends import PermissionBackend
from permission.views import ProtectQuerysetMixin
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from .forms import InvoiceForm, ProductFormSet, ProductFormSetHelper, RemittanceForm, LinkTransactionToRemittanceForm
from .models import Invoice, Product, Remittance, SpecialTransactionProxy, SogeCredit
from .tables import InvoiceTable, RemittanceTable, SpecialTransactionTable, SogeCreditTable
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class InvoiceCreateView(ProtectQuerysetMixin, LoginRequiredMixin, CreateView):
"""
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Create Invoice
"""
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model = Invoice
form_class = InvoiceForm
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extra_context = {"title": _("Create new invoice")}
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def get_context_data(self, **kwargs):
context = super().get_context_data(**kwargs)
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form = context['form']
form.helper = FormHelper()
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# Remove form tag on the generation of the form in the template (already present on the template)
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form.helper.form_tag = False
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# The formset handles the set of the products
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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)
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# For each product, we save it
formset = ProductFormSet(self.request.POST, instance=form.instance)
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if formset.is_valid():
for f in formset:
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# We don't save the product if the designation is not entered, ie. if the line is empty
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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_list')
class InvoiceListView(ProtectQuerysetMixin, 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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extra_context = {"title": _("Invoices list")}
class InvoiceUpdateView(ProtectQuerysetMixin, LoginRequiredMixin, UpdateView):
"""
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Create Invoice
"""
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model = Invoice
form_class = InvoiceForm
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extra_context = {"title": _("Update an invoice")}
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def get_context_data(self, **kwargs):
context = super().get_context_data(**kwargs)
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form = context['form']
form.helper = FormHelper()
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# Remove form tag on the generation of the form in the template (already present on the template)
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form.helper.form_tag = False
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# Fill the intial value for the date field, with the initial date of the model instance
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form.fields['date'].initial = form.instance.date
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# The formset handles the set of the products
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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)
formset = ProductFormSet(self.request.POST, instance=form.instance)
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saved = []
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# For each product, we save it
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if formset.is_valid():
for f in formset:
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# We don't save the product if the designation is not entered, ie. if the line is empty
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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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# Remove old products that weren't given in the form
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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_list')
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class InvoiceRenderView(LoginRequiredMixin, View):
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"""
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Render Invoice as a generated PDF with the given information and a LaTeX template
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"""
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def get(self, request, **kwargs):
pk = kwargs["pk"]
invoice = Invoice.objects.filter(PermissionBackend.filter_queryset(request.user, Invoice, "view")).get(pk=pk)
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products = Product.objects.filter(invoice=invoice).all()
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# Informations of the BDE. Should be updated when the school will move.
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invoice.place = "Gif-sur-Yvette"
invoice.my_name = "BDE ENS Paris-Saclay"
invoice.my_address_street = "4 avenue des Sciences"
invoice.my_city = "91190 Gif-sur-Yvette"
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invoice.bank_code = 30003
invoice.desk_code = 3894
invoice.account_number = 37280662
invoice.rib_key = 14
invoice.bic = "SOGEFRPP"
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# Replace line breaks with the LaTeX equivalent
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invoice.description = invoice.description.replace("\r", "").replace("\n", "\\\\ ")
invoice.address = invoice.address.replace("\r", "").replace("\n", "\\\\ ")
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# Fill the template with the information
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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
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# We render the file in a temporary directory
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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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# The file has to be rendered twice
for ignored in range(2):
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error = subprocess.Popen(
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["pdflatex", "invoice-{}.tex".format(pk)],
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cwd=tmp_dir,
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stdin=open(os.devnull, "r"),
stderr=open(os.devnull, "wb"),
stdout=open(os.devnull, "wb"),
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).wait()
if error:
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raise IOError("An error attempted while generating a invoice (code=" + str(error) + ")")
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# Display the generated pdf as a HTTP Response
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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=Facture%20n°{:d}.pdf".format(pk)
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except IOError as e:
raise e
finally:
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# Delete all temporary files
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shutil.rmtree(tmp_dir)
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return response
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class RemittanceCreateView(ProtectQuerysetMixin, LoginRequiredMixin, CreateView):
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"""
Create Remittance
"""
model = Remittance
form_class = RemittanceForm
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extra_context = {"title": _("Create a new remittance")}
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def get_success_url(self):
return reverse_lazy('treasury:remittance_list')
def get_context_data(self, **kwargs):
context = super().get_context_data(**kwargs)
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context["table"] = RemittanceTable(
data=Remittance.objects.filter(
PermissionBackend.filter_queryset(self.request.user, Remittance, "view")).all())
context["special_transactions"] = SpecialTransactionTable(data=SpecialTransaction.objects.none())
return context
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class RemittanceListView(LoginRequiredMixin, TemplateView):
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"""
List existing Remittances
"""
template_name = "treasury/remittance_list.html"
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extra_context = {"title": _("Remittances list")}
def get_context_data(self, **kwargs):
context = super().get_context_data(**kwargs)
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opened_remittances = RemittanceTable(
data=Remittance.objects.filter(closed=False).filter(
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PermissionBackend.filter_queryset(self.request.user, Remittance, "view")).all(),
prefix="opened-remittances-",
)
opened_remittances.paginate(page=self.request.GET.get("opened-remittances-page", 1), per_page=10)
context["opened_remittances"] = opened_remittances
closed_remittances = RemittanceTable(
data=Remittance.objects.filter(closed=True).filter(
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PermissionBackend.filter_queryset(self.request.user, Remittance, "view")).all(),
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prefix="closed-remittances-",
)
closed_remittances.paginate(page=self.request.GET.get("closed-remittances-page", 1), per_page=10)
context["closed_remittances"] = closed_remittances
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no_remittance_tr = SpecialTransactionTable(
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data=SpecialTransaction.objects.filter(source__in=NoteSpecial.objects.filter(~Q(remittancetype=None)),
specialtransactionproxy__remittance=None).filter(
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PermissionBackend.filter_queryset(self.request.user, Remittance, "view")).all(),
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exclude=('remittance_remove', ),
prefix="no-remittance-",
)
no_remittance_tr.paginate(page=self.request.GET.get("no-remittance-page", 1), per_page=10)
context["special_transactions_no_remittance"] = no_remittance_tr
with_remittance_tr = SpecialTransactionTable(
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data=SpecialTransaction.objects.filter(source__in=NoteSpecial.objects.filter(~Q(remittancetype=None)),
specialtransactionproxy__remittance__closed=False).filter(
PermissionBackend.filter_queryset(self.request.user, Remittance, "view")).all(),
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exclude=('remittance_add', ),
prefix="with-remittance-",
)
with_remittance_tr.paginate(page=self.request.GET.get("with-remittance-page", 1), per_page=10)
context["special_transactions_with_remittance"] = with_remittance_tr
return context
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class RemittanceUpdateView(ProtectQuerysetMixin, LoginRequiredMixin, UpdateView):
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"""
Update Remittance
"""
model = Remittance
form_class = RemittanceForm
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extra_context = {"title": _("Update a remittance")}
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def get_success_url(self):
return reverse_lazy('treasury:remittance_list')
def get_context_data(self, **kwargs):
context = super().get_context_data(**kwargs)
data = SpecialTransaction.objects.filter(specialtransactionproxy__remittance=self.object).filter(
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PermissionBackend.filter_queryset(self.request.user, Remittance, "view")).all()
context["special_transactions"] = SpecialTransactionTable(
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data=data,
exclude=('remittance_add', 'remittance_remove', ) if self.object.closed else ('remittance_add', ))
return context
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class LinkTransactionToRemittanceView(ProtectQuerysetMixin, LoginRequiredMixin, UpdateView):
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"""
Attach a special transaction to a remittance
"""
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model = SpecialTransactionProxy
form_class = LinkTransactionToRemittanceForm
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extra_context = {"title": _("Attach a transaction to a remittance")}
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def get_success_url(self):
return reverse_lazy('treasury:remittance_list')
def get_context_data(self, **kwargs):
context = super().get_context_data(**kwargs)
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form = context["form"]
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form.fields["last_name"].initial = self.object.transaction.last_name
form.fields["first_name"].initial = self.object.transaction.first_name
form.fields["bank"].initial = self.object.transaction.bank
form.fields["amount"].initial = self.object.transaction.amount
form.fields["remittance"].queryset = form.fields["remittance"] \
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.queryset.filter(remittance_type__note=self.object.transaction.source)
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return context
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class UnlinkTransactionToRemittanceView(LoginRequiredMixin, View):
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"""
Unlink a special transaction and its remittance
"""
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def get(self, *args, **kwargs):
pk = kwargs["pk"]
transaction = SpecialTransactionProxy.objects.get(pk=pk)
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# The remittance must be open (or inexistant)
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if transaction.remittance and transaction.remittance.closed:
raise ValidationError("Remittance is already closed.")
transaction.remittance = None
transaction.save()
return redirect('treasury:remittance_list')
class SogeCreditListView(LoginRequiredMixin, ProtectQuerysetMixin, SingleTableView):
"""
List all Société Générale credits
"""
model = SogeCredit
table_class = SogeCreditTable
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extra_context = {"title": _("List of credits from the Société générale")}
def get_queryset(self, **kwargs):
"""
Filter the table with the given parameter.
:param kwargs:
:return:
"""
qs = super().get_queryset()
if "search" in self.request.GET:
pattern = self.request.GET["search"]
if pattern:
qs = qs.filter(
Q(user__first_name__iregex=pattern)
| Q(user__last_name__iregex=pattern)
| Q(user__note__alias__name__iregex="^" + pattern)
| Q(user__note__alias__normalized_name__iregex="^" + Alias.normalize(pattern))
)
if "valid" in self.request.GET:
q = Q(credit_transaction=None)
if not self.request.GET["valid"]:
q = ~q
qs = qs.filter(q)
return qs[:20]
class SogeCreditManageView(LoginRequiredMixin, ProtectQuerysetMixin, BaseFormView, DetailView):
"""
Manage credits from the Société générale.
"""
model = SogeCredit
form_class = Form
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extra_context = {"title": _("Manage credits from the Société générale")}
def form_valid(self, form):
if "validate" in form.data:
self.get_object().validate(True)
elif "delete" in form.data:
self.get_object().delete()
return super().form_valid(form)
def get_success_url(self):
if "validate" in self.request.POST:
return reverse_lazy('treasury:manage_soge_credit', args=(self.get_object().pk,))
return reverse_lazy('treasury:soge_credits')