Render billings

Dockerfile

@@ -9,6 +9,11 @@ RUN apt update && \
     apt install -y gettext nginx uwsgi uwsgi-plugin-python3 && \
     rm -rf /var/lib/apt/lists/*
 
+# Install LaTeX requirements
+RUN apt update && \
+    apt install -y texlive-latex-extra textlive-fonts-extra && \
+    rm -rf /var/lib/apt/lists/*
+
 COPY . /code/
 
 # Comment what is not needed

apps/treasury/views.py

@@ -1,10 +1,18 @@
 # 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 django.contrib.auth.mixins import LoginRequiredMixin
+from django.http import HttpResponse
+from django.template.loader import render_to_string
 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 .models import Billing
 from .tables import BillingTable
@@ -36,7 +44,48 @@ class BillingUpdateView(LoginRequiredMixin, UpdateView):
     # form_class = BillingForm
 
 
-class BillingRenderView(View):
+class BillingRenderView(LoginRequiredMixin, View):
     """
-    Render Billing
+    Render Billing as generated PDF
     """
+
+    def get(self, request, **kwargs):
+        pk = kwargs["pk"]
+        billing = Billing.objects.get(pk=pk)
+
+        billing.description = billing.description.replace("\n", "\\newline\n")
+        billing.address = billing.address.replace("\n", "\\newline\n")
+        tex = render_to_string("treasury/billing_sample.tex", dict(obj=billing))
+        try:
+            os.mkdir(BASE_DIR + "/tmp")
+        except FileExistsError:
+            pass
+        tmp_dir = mkdtemp(prefix=BASE_DIR + "/tmp/")
+
+        with open("{}/billing-{:d}.tex".format(tmp_dir, pk), "wb") as f:
+            f.write(tex.encode("UTF-8"))
+        del tex
+
+        error = subprocess.Popen(
+            ["pdflatex", "billing-{}.tex".format(pk)],
+            cwd=tmp_dir,
+            stdin=open(os.devnull, "r"),
+            stderr=open(os.devnull, "wb"),
+            stdout=open(os.devnull, "wb")
+        ).wait()
+
+        error = subprocess.Popen(
+            ["pdflatex", "billing-{}.tex".format(pk)],
+            cwd=tmp_dir,
+            stdin=open(os.devnull, "r"),
+            stderr=open(os.devnull, "wb"),
+            stdout=open(os.devnull, "wb")
+        ).wait()
+
+        pdf = open("{}/billing-{}.pdf".format(tmp_dir, pk), 'rb').read()
+        shutil.rmtree(tmp_dir)
+
+        response = HttpResponse(pdf, content_type="application/pdf")
+        response['Content-Disposition'] = "inline;filename=billing-{:d}.pdf".format(pk)
+
+        return response

templates/treasury/billing_sample.tex

@@ -0,0 +1,186 @@
+\nonstopmode
+\documentclass[11pt]{article}
+
+\usepackage[french]{babel}
+\usepackage[T1]{fontenc}
+\usepackage[utf8]{inputenc}
+\usepackage[a4paper]{geometry}
+\usepackage{units}
+\usepackage{bera}
+\usepackage{graphicx}
+\usepackage{fancyhdr}
+\usepackage{fp}
+\usepackage{transparent}
+\usepackage{eso-pic}
+
+\def\TVA{0}    % Taux de la TVA
+
+\def\TotalHT{0}
+\def\TotalTVA{0}
+
+\newcommand{\AjouterProduit}[4]{%    Arguments : Désignation, quantité, prix unitaire HT, prix total HT
+    \FPround{\prix}{#3}{2}
+    \FPround{\montant}{#4}{2}
+    \FPadd{\TotalHT}{\TotalHT}{\montant}
+
+    \eaddto\ListeProduits{#1    &    \prix    &    #2    &    \montant    \cr}
+}
+
+\newcommand{\AfficheResultat}{%
+    \ListeProduits
+
+    \FPeval{\TotalTVA}{\TotalHT * \TVA / 100}
+    \FPadd{\TotalTTC}{\TotalHT}{\TotalTVA}
+    \FPround{\TotalHT}{\TotalHT}{2}
+    \FPround{\TotalTVA}{\TotalTVA}{2}
+    \FPround{\TotalTTC}{\TotalTTC}{2}
+    \global\let\TotalHT\TotalHT
+    \global\let\TotalTVA\TotalTVA
+    \global\let\TotalTTC\TotalTTC
+
+    \cr \hline
+    Total HT            & & &    \TotalHT    \cr
+    TVA \TVA~\%         & & &    \TotalTVA    \cr
+    \hline \hline
+    \textbf{Total TTC}    & & &    \TotalTTC
+}
+
+\newcommand*\eaddto[2]{% version développée de \addto
+   \edef\tmp{#2}%
+   \expandafter\addto
+   \expandafter#1%
+   \expandafter{\tmp}%
+}
+
+\newcommand	{\ListeProduits}{}
+
+% Logo du BDE
+\AddToShipoutPicture*{
+    \put(0,0){
+        \parbox[b][\paperheight]{\paperwidth}{%
+            \vfill
+            \centering
+            {\transparent{0.1}\includegraphics[width=\textwidth]{../../static/img/{{ obj.bde }}}}%
+            \vfill
+        }
+    }
+}
+
+
+%%%%%%%%%%%%%%%%%%%%% A MODIFIER DANS LA FACTURE %%%%%%%%%%%%%%%%%%%%%
+% Infos Association
+\def\MonNom{{"{"}}{{ obj.my_name }}} % Nom de l'association
+\def\MonAdresseRue{{"{"}}{{ obj.my_address_street }}} % Adresse de l'association
+\def\MonAdresseVille{{"{"}}{{ obj.my_city }}}
+
+% Informations bancaires de l'association
+\def\CodeBanque{{"{"}}{{ obj.bank_code|stringformat:".05d" }}}
+\def\CodeGuichet{{"{"}}{{ obj.desk_code|stringformat:".05d" }}}
+\def\NCompte{{"{"}}{{ obj.account_number|stringformat:".011d" }}}
+\def\CleRib{{"{"}}{{ obj.rib_key|stringformat:".02d" }}}
+\def\IBAN{FR76\CodeBanque\CodeGuichet\NCompte\CleRib}
+\def\CodeBic{{"{"}}{{ obj.bic }}}
+
+\def\FactureNum            {{"{"}}{{obj.id}}}    % Numéro de facture
+\def\FactureAcquittee    {% if obj.acquitted %} {oui} {% else %} {non} {% endif %}     % Facture acquittée : oui/non
+\def\FactureLieu    {{"{"}}{{ obj.place }}}    % Lieu de l'édition de la facture
+\def\FactureDate    {{"{"}}{{ obj.date }}}    % Date de l'édition de la facture
+\def\FactureObjet   {{"{"}}{{ obj.subject|safe }} }    % Objet du document
+% Description de la facture
+\def\FactureDescr   {{"{"}}{{ obj.description|safe }}}
+
+% Infos Client
+\def\ClientNom{{"{"}}{{obj.name|safe}}}    % Nom du client
+\def\ClientAdresse{{"{"}}{{ obj.address|safe }}} % Adresse du client
+
+% Liste des produits facturés : Désignation, quantité, prix unitaire HT
+
+{% for product in obj.products %}
+\AjouterProduit{ {{product.designation|safe}} } { {{product.quantity|safe}} } { {{product.amount|safe}}} { {{product.total|safe}}}
+{% endfor %}
+
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+
+
+\geometry{verbose,tmargin=4em,bmargin=8em,lmargin=6em,rmargin=6em}
+\setlength{\parindent}{1pt}
+\setlength{\parskip}{1ex plus 0.5ex minus 0.2ex}
+
+\thispagestyle{fancy}
+\pagestyle{fancy}
+\setlength{\parindent}{0pt}
+
+\renewcommand{\headrulewidth}{0pt}
+\cfoot{
+    \small{\MonNom  ~--~ \MonAdresseRue \MonAdresseVille ~--~ Telephone : +33(0)6 89 88 56 50\newline
+     Site web : bde.ens-cachan.fr ~--~ E-mail : tresorerie.bde@lists.crans.org \newline Numéro SIRET : 399 485 838 00011
+    }
+}
+
+\begin{document}
+
+% Logo de la société
+% \includegraphics{logo.jpg}
+
+% Nom et adresse de la société
+\MonNom \\
+\MonAdresseRue \\
+\MonAdresseVille
+
+Facture n°\FactureNum
+
+
+{\addtolength{\leftskip}{10.5cm} %in ERT
+   \ClientNom    \\
+    \ClientAdresse        \\
+
+} %in ERT
+
+
+\hspace*{10.5cm}
+\FactureLieu, le \FactureDate
+
+~\\~\\
+
+\textbf{Objet : \FactureObjet \\}
+
+\textnormal{\FactureDescr}
+
+~\\
+
+\begin{center}
+    \begin{tabular}{lrrr}
+        \textbf{Désignation ~~~~~~}    & \textbf{Prix unitaire}    & \textbf{Quantité}    & \textbf{Montant (EUR)}    \\
+        \hline
+        \AfficheResultat{}
+    \end{tabular}
+\end{center}
+
+~\\
+
+\ifthenelse{\equal{\FactureAcquittee}{oui}}{
+    Facture acquittée.
+}{
+
+    À régler par chèque ou par virement bancaire :
+
+    \begin{center}
+        \begin{tabular}{|c c c c|}
+            \hline
+            \textbf{Code banque} & \textbf{Code guichet} & \textbf{N° de Compte} & \textbf{Clé RIB}\\
+                    \CodeBanque          & \CodeGuichet        & \NCompte               & \CleRib   \\
+            \hline
+            \textbf{IBAN N°}        & \multicolumn{3}{|l|} \IBAN         \\
+            \hline
+            \textbf{Code BIC}        & \multicolumn{3}{|l|}\CodeBic         \\
+            \hline
+        \end{tabular}
+    \end{center}
+
+}
+
+\begin{center}
+TVA non applicable, article 293 B du CGI.
+\end{center}
+
+\end{document}