forked from ScoDoc/ScoDoc
96 lines
3.2 KiB
Python
96 lines
3.2 KiB
Python
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# -*- mode: python -*-
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# -*- coding: utf-8 -*-
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##############################################################################
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#
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# Gestion scolarite IUT
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#
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# Copyright (c) 1999 - 2021 Emmanuel Viennet. All rights reserved.
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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
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# along with this program; if not, write to the Free Software
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# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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#
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# Emmanuel Viennet emmanuel.viennet@viennet.net
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#
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##############################################################################
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"""Gestion des images logos (nouveau ScoDoc 9)
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Les logos sont `logo_header.<ext>` et `logo_footer.<ext>`
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avec `ext` membre de LOGOS_IMAGES_ALLOWED_TYPES (= jpg, png)
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SCODOC_LOGOS_DIR /opt/scodoc-data/config/logos
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"""
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import imghdr
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import os
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from flask import abort, current_app
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from app.scodoc import sco_utils as scu
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def get_logo_filename(logo_type: str, scodoc_dept: str) -> str:
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"""return full filename for this logo, or "" if not found
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an existing file with extension.
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logo_type: "header" or "footer"
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scodoc-dept: acronym
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"""
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# Search logos in dept specific dir (/opt/scodoc-data/config/logos/logos_<dept>),
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# then in config dir /opt/scodoc-data/config/logos/
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for image_dir in (
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scu.SCODOC_LOGOS_DIR + "/logos_" + scodoc_dept,
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scu.SCODOC_LOGOS_DIR, # global logos
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):
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for suffix in scu.LOGOS_IMAGES_ALLOWED_TYPES:
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filename = os.path.join(image_dir, f"logo_{logo_type}.{suffix}")
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if os.path.isfile(filename) and os.access(filename, os.R_OK):
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return filename
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return ""
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def guess_image_type(stream) -> str:
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"guess image type from header in stream"
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header = stream.read(512)
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stream.seek(0)
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fmt = imghdr.what(None, header)
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if not fmt:
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return None
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return fmt if fmt != "jpeg" else "jpg"
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def _ensure_directory_exists(filename):
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"create enclosing directory if necessary"
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directory = os.path.split(filename)[0]
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if not os.path.exists(directory):
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current_app.logger.info(f"sco_logos creating directory %s", directory)
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os.mkdir(directory)
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def store_image(stream, basename):
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img_type = guess_image_type(stream)
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if img_type not in scu.LOGOS_IMAGES_ALLOWED_TYPES:
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abort(400, "type d'image invalide")
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filename = basename + "." + img_type
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_ensure_directory_exists(filename)
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with open(filename, "wb") as f:
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f.write(stream.read())
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current_app.logger.info(f"sco_logos.store_image %s", filename)
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# erase other formats if they exists
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for extension in set(scu.LOGOS_IMAGES_ALLOWED_TYPES) - set([img_type]):
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try:
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os.unlink(basename + "." + extension)
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except IOError:
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pass
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