mirror of
https://gitlab2.federez.net/re2o/re2o
synced 2024-11-22 11:23:10 +00:00
113 lines
3.7 KiB
Python
113 lines
3.7 KiB
Python
# coding: utf-8
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# Re2o est un logiciel d'administration développé initiallement au rezometz. 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 Goulven 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 tempfile
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from subprocess import Popen, PIPE
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import os
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from datetime import datetime
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from django.template.loader import get_template
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from django.template import Context
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from django.http import HttpResponse
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from django.conf import settings
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from django.utils.text import slugify
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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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filename = '_'.join([
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'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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r = render_tex(_request, 'cotisations/factures.tex', ctx)
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r['Content-Disposition'] = 'attachment; filename="{name}.pdf"'.format(
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name=filename
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)
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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 = 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 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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