Ecriture des fonctions d'accés aux logos (et aux images)
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@ -34,30 +34,188 @@ 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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import re
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from pathlib import Path
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from flask import abort, current_app
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from flask import abort, current_app, url_for
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from werkzeug.utils import secure_filename
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from app import Departement, ScoValueError
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from app.scodoc import sco_utils as scu
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from PIL import Image as PILImage
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GLOBAL = "_GLOBAL" # category for server level logos
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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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def find_logo(logoname, dept_id=None, strict=False, prefix=scu.LOGO_FILE_PREFIX):
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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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"Recherche un logo 'name' existant.
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Deux strategies:
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si strict:
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reherche uniquement dans le département puis si non trouvé au niveau global
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sinon
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On recherche en local au dept d'abord puis si pas trouvé recherche globale
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quelque soit la stratégie, retourne None si pas trouvé
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:param logoname: le nom recherche
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:param dept_id: l'id du département dans lequel se fait la recherche (None si global)
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:param strict: stratégie de recherche (strict = False => dept ou global)
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:param prefix: le prefix utilisé (parmi scu.LOGO_FILE_PREFIX / scu.BACKGROUND_FILE_PREFIX)
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:return: un objet Logo désignant le fichier image trouvé (ou None)
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"""
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logo = Logo(logoname, dept_id, prefix).select()
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if logo is None and not strict:
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logo = Logo(logoname=logoname, dept_id=None, prefix=prefix).select()
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return logo
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return ""
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def write_logo(stream, name, dept_id=None):
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"""Crée le fichier logo sur le serveur.
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Le suffixe du fichier (parmi LOGO_IMAGES_ALLOWED_TYPES) est déduit du contenu du stream"""
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Logo(logoname=name, dept_id=dept_id).create(stream)
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def list_logos():
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"""Crée l'inventaire de tous les logos existants.
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L'inventaire se présente comme un dictionnaire de dictionnaire de Logo:
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[GLOBAL][name] pour les logos globaux
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[dept_id][name] pour les logos propres à un département (attention id numérique du dept)
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"""
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inventory = {GLOBAL: _list_dept_logos()} # logos globaux (header / footer)
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for dept in Departement.query.filter_by(visible=True).all():
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logos_dept = _list_dept_logos(dept_id=dept.id)
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if logos_dept:
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inventory[dept.acronym] = _list_dept_logos(dept.id)
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return inventory
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def _list_dept_logos(dept_id=None, prefix=scu.LOGO_FILE_PREFIX):
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"""nventorie toutes les images existantes pour un niveau (GLOBAL ou un département).
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retourne un dictionnaire de Logo [logoname] -> Logo
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les noms des fichiers concernés doivent être de la forme: <rep>/<prefix><name>.<suffixe>
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<rep> : répertoire de recherche (déduit du dept_id)
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<prefix>: le prefix (LOGO_FILE_PREFIX pour les logos)
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<suffix>: un des suffixes autorisés
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:param dept_id: l'id du departement concerné (si None -> global)
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:param prefix: le préfixe utilisé
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:return: le résultat de la recherche ou None si aucune image trouvée
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"""
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allowed_ext = "|".join(scu.LOGOS_IMAGES_ALLOWED_TYPES)
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filename_parser = re.compile(f"{prefix}([^.]*).({allowed_ext})")
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logos = {}
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path_dir = Path(scu.SCODOC_LOGOS_DIR)
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if dept_id:
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path_dir = Path(
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os.path.sep.join(
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[scu.SCODOC_LOGOS_DIR, scu.LOGOS_DIR_PREFIX + str(dept_id)]
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)
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)
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if path_dir.exists():
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for entry in path_dir.iterdir():
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if os.access(path_dir.joinpath(entry).absolute(), os.R_OK):
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result = filename_parser.match(entry.name)
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if result:
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logoname = result.group(1)
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logos[logoname] = Logo(logoname=logoname, dept_id=dept_id).select()
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return logos if len(logos.keys()) > 0 else None
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class Logo:
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"""Responsable des opérations (select, create), du calcul des chemins et url
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ainsi que de la récupération des informations sur un logp.
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Usage:
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logo existant: Logo(<name>, <dept_id>, ...).select() (retourne None si fichier non trouvé)
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logo en création: Logo(<name>, <dept_id>, ...).create(stream)
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Les attributs filename, filepath, get_url() ne devraient pas être utilisés avant les opérations
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select ou save (le format n'est pas encore connu à ce moement là)
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"""
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def __init__(self, logoname, dept_id=None, prefix=scu.LOGO_FILE_PREFIX):
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"""Initialisation des noms et département des logos.
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if prefix = None on recherche simplement une image 'logoname.*'
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Le format est renseigné au moment de la lecture (select) ou de la création (create) de l'objet
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"""
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self.logoname = secure_filename(logoname)
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self.scodoc_dept_id = dept_id
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self.prefix = prefix or ""
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self.suffix = None
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self.dimensions = None
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if self.scodoc_dept_id:
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self.dirpath = os.path.sep.join(
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[
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scu.SCODOC_LOGOS_DIR,
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scu.LOGOS_DIR_PREFIX + secure_filename(str(dept_id)),
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]
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)
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else:
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self.dirpath = scu.SCODOC_LOGOS_DIR
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self.basepath = os.path.sep.join(
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[self.dirpath, self.prefix + secure_filename(self.logoname)]
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)
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self.filepath = None
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self.filename = None
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def _set_format(self, fmt):
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self.suffix = fmt
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self.filepath = self.basepath + "." + fmt
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self.filename = self.logoname + "." + fmt
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def _ensure_directory_exists(self):
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"create enclosing directory if necessary"
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if not Path(self.dirpath).exists():
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current_app.logger.info(f"sco_logos creating directory %s", self.dirpath)
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os.mkdir(self.dirpath)
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def create(self, stream):
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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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self._set_format(img_type)
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self._ensure_directory_exists()
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filename = self.basepath + "." + self.suffix
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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", self.filename)
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# erase other formats if they exists
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for suffix in set(scu.LOGOS_IMAGES_ALLOWED_TYPES) - set([img_type]):
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try:
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os.unlink(self.basepath + "." + suffix)
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except IOError:
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pass
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def select(self):
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"""
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Récupération des données pour un logo existant
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il doit exister un et un seul fichier image parmi de suffixe/types autorisés
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(sinon on prend le premier trouvé)
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cette opération permet d'affiner le format d'un logo de format inconnu
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"""
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for suffix in scu.LOGOS_IMAGES_ALLOWED_TYPES:
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path = Path(self.basepath + "." + suffix)
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if path.exists():
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self._set_format(suffix)
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with open(self.filepath, "rb") as f:
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img = PILImage.open(f)
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self.dimensions = img.size
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return self
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return None
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def get_url(self):
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"""Retourne l'URL permettant d'obtenir l'image du logo"""
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return url_for(
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"scodoc.get_logo",
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scodoc_dept=self.scodoc_dept_id,
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name=self.logoname,
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global_if_not_found=False,
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)
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def get_url_small(self):
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"""Retourne l'URL permettant d'obtenir l'image du logo sous forme de miniature"""
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return url_for(
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"scodoc.get_logo_small",
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scodoc_dept=self.scodoc_dept_id,
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name=self.logoname,
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global_if_not_found=False,
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)
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def guess_image_type(stream) -> str:
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@ -68,28 +226,3 @@ def guess_image_type(stream) -> str:
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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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@ -228,7 +228,12 @@ if not os.path.exists(SCO_TMP_DIR) and os.path.exists(Config.SCODOC_VAR_DIR):
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# ----- Les logos: /opt/scodoc-data/config/logos
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SCODOC_LOGOS_DIR = os.path.join(SCODOC_CFG_DIR, "logos")
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LOGOS_IMAGES_ALLOWED_TYPES = ("jpg", "jpeg", "png") # remind that PIL does not read pdf
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LOGOS_DIR_PREFIX = "logos_"
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LOGO_FILE_PREFIX = "logo_"
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# forme générale des noms des fichiers logos/background:
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# SCODOC_LOGO_DIR/LOGO_FILE_PREFIX<name>.<suffix> (fichier global) ou
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# SCODOC_LOGO_DIR/LOGOS_DIR_PREFIX<dept_id>/LOGO_FILE_PREFIX<name>.<suffix> (fichier départemental)
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# ----- Les outils distribués
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SCO_TOOLS_DIR = os.path.join(Config.SCODOC_DIR, "tools")
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