mirror of
https://gitlab2.federez.net/re2o/re2o
synced 2024-11-25 22:22:26 +00:00
151 lines
5 KiB
Python
151 lines
5 KiB
Python
# -*- mode: python; coding: utf-8 -*-
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# Re2o est un logiciel d'administration développé initiallement au Rézo Metz. Il
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# se veut agnostique au réseau considéré, de manière à être installable en
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# quelques clics.
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#
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# Copyright © 2017 Gabriel Détraz
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# Copyright © 2017 Lara Kermarec
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# Copyright © 2017 Augustin Lemesle
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#
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# This program is free software; you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation; either version 2 of the License, or
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# (at your option) any later version.
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#
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# This program is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License along
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# with this program; if not, write to the Free Software Foundation, Inc.,
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# 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
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"""tex.py
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Module in charge of rendering some LaTex templates.
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Used to generated PDF invoice.
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"""
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import os
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import tempfile
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from datetime import datetime
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from subprocess import PIPE, Popen
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from django.conf import settings
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from django.db import models
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from django.http import HttpResponse
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from django.template.loader import get_template
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from django.utils.text import slugify
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from preferences.models import CotisationsOption
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from re2o.mixins import AclMixin, RevMixin
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TEMP_PREFIX = getattr(settings, "TEX_TEMP_PREFIX", "render_tex-")
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CACHE_PREFIX = getattr(settings, "TEX_CACHE_PREFIX", "render-tex")
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CACHE_TIMEOUT = getattr(settings, "TEX_CACHE_TIMEOUT", 86400) # 1 day
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def render_invoice(_request, ctx={}):
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"""
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Render an invoice using some available information such as the current
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date, the user, the articles, the prices, ...
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"""
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options, _ = CotisationsOption.objects.get_or_create()
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is_estimate = ctx.get("is_estimate", False)
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filename = "_".join(
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[
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"cost_estimate" if is_estimate else "invoice",
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slugify(ctx.get("asso_name", "")),
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slugify(ctx.get("recipient_name", "")),
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str(ctx.get("DATE", datetime.now()).year),
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str(ctx.get("DATE", datetime.now()).month),
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str(ctx.get("DATE", datetime.now()).day),
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]
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)
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templatename = options.invoice_template.template.name.split("/")[-1]
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r = render_tex(_request, templatename, ctx)
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r["Content-Disposition"] = 'attachment; filename="{name}.pdf"'.format(name=filename)
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return r
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def render_voucher(_request, ctx={}):
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"""
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Render a subscribtion voucher.
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"""
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options, _ = CotisationsOption.objects.get_or_create()
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filename = "_".join(
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[
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"voucher",
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slugify(ctx.get("asso_name", "")),
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slugify(ctx.get("firstname", "")),
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slugify(ctx.get("lastname", "")),
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str(ctx.get("date_begin", datetime.now()).year),
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str(ctx.get("date_begin", datetime.now()).month),
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str(ctx.get("date_begin", datetime.now()).day),
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]
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)
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templatename = options.voucher_template.template.name.split("/")[-1]
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r = render_tex(_request, templatename, ctx)
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r["Content-Disposition"] = 'attachment; filename="{name}.pdf"'.format(name=filename)
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return r
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def create_pdf(template, ctx={}):
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"""Creates and returns a PDF from a LaTeX template using pdflatex.
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It create a temporary file for the PDF then read it to return its content.
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Args:
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template: Path to the LaTeX template.
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ctx: Dict with the context for rendering the template.
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Returns:
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The content of the temporary PDF file generated.
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"""
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context = ctx
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template = get_template(template)
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rendered_tpl = template.render(context).encode("utf-8")
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with tempfile.TemporaryDirectory() as tempdir:
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for _ in range(2):
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process = Popen(
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["pdflatex", "-output-directory", tempdir],
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stdin=PIPE,
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stdout=PIPE,
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)
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process.communicate(rendered_tpl)
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with open(os.path.join(tempdir, "texput.pdf"), "rb") as f:
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pdf = f.read()
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return pdf
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def escape_chars(string):
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"""Escape the '%' and the '€' signs to avoid messing with LaTeX"""
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if not isinstance(string, str):
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return string
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mapping = (("€", r"\euro"), ("%", r"\%"))
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r = str(string)
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for k, v in mapping:
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r = r.replace(k, v)
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return r
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def render_tex(_request, template, ctx={}):
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"""Creates a PDF from a LaTex templates using pdflatex.
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Calls `create_pdf` and send back an HTTP response for
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accessing this file.
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Args:
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_request: Unused, but allow using this function as a Django view.
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template: Path to the LaTeX template.
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ctx: Dict with the context for rendering the template.
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Returns:
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An HttpResponse with type `application/pdf` containing the PDF file.
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"""
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pdf = create_pdf(template, ctx)
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r = HttpResponse(content_type="application/pdf")
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r.write(pdf)
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return r
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