manuels-scolaires/manuels/models.py

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import logging
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import os
import re
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import uuid as uuid
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import bs4
import requests
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from django.conf import settings
from django.contrib.postgres.fields import CIEmailField
from django.core.exceptions import ValidationError
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from django.core.mail import EmailMultiAlternatives
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from django.db import models
from django.db.models import Sum
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from django.template.loader import render_to_string
from django.urls import reverse
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from manuels.utils import validate_isbn
logger = logging.getLogger(__name__)
class ISBNError(Exception):
def __init__(self, data):
self.data = data
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class BaseModel(models.Model):
class Meta:
abstract = True
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created_at = models.DateTimeField("créé le", auto_now_add=True)
updated_at = models.DateTimeField("mis à jour le", auto_now=True)
def phone_validator(value):
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regex = re.compile(r"^\d{10}$")
if not regex.match(value):
raise ValidationError(
"%(value)s n'est pas un numéro de téléphone valide. Format attendu : 10 chiffres.",
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params={"value": value},
)
class Teacher(BaseModel):
class Meta:
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verbose_name = "coordonnateur"
verbose_name_plural = "coordonnateurs"
ordering = ["first_name"]
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uuid = models.UUIDField(primary_key=True, default=uuid.uuid4, editable=False)
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first_name = models.CharField("prénom", max_length=100)
last_name = models.CharField("nom", max_length=100)
phone_number = models.CharField(
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"numéro de téléphone",
help_text="En cas d'urgence, 10 chiffres.",
max_length=10,
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validators=[phone_validator],
)
email = CIEmailField(
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"adresse email",
help_text="Utilisée pour vous transmettre votre lien personnel",
unique=True,
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)
has_confirmed_list = models.BooleanField(
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"a confirmé les listes", default=False, blank=True
)
def get_absolute_url(self):
from django.urls import reverse
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return reverse("list_books", kwargs={"pk": str(self.pk)})
@property
def full_name(self):
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return f"{self.first_name} {self.last_name}"
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def __str__(self):
return self.full_name
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def send_link(self, request):
dest = self.email
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link = request.build_absolute_uri(reverse("list_books", args=[str(self.pk)]))
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msg = EmailMultiAlternatives(
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subject="Gestion des manuels scolaires",
body=f"Bonjour {self.first_name},\n"
f"Voici votre lien pour la gestion des manuels scolaires : {link}",
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from_email=settings.SERVER_EMAIL,
to=[dest],
)
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reply_to = [os.getenv("REPLY_TO")]
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if reply_to:
msg.reply_to = reply_to
msg.attach_alternative(
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render_to_string(
"manuels/emails_link.html", {"link": link, "teacher": self}
),
"text/html",
)
msg.send()
def send_confirmation(self, request):
dest = settings.LIBRARIAN_EMAILS
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link = request.build_absolute_uri(reverse("home_page"))
msg = EmailMultiAlternatives(
subject="Gestion des manuels scolaires - Confirmation d'un coordonnateur",
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body=f"Bonjour,\n" f"{self.first_name} a confirmé ses listes sur {link}",
from_email=settings.SERVER_EMAIL,
to=dest,
)
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reply_to = [os.getenv("REPLY_TO")]
if reply_to:
msg.reply_to = reply_to
msg.attach_alternative(
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render_to_string(
"manuels/emails_confirmation.html", {"link": link, "teacher": self}
),
"text/html",
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)
msg.send()
class Level(BaseModel):
class Meta:
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verbose_name = "classe"
verbose_name_plural = "classes"
ordering = ["order", "name"]
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name = models.CharField("nom", max_length=50)
order = models.IntegerField("ordre", default=0)
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def __str__(self):
return self.name
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@property
def non_acquired_consumables(self):
if hasattr(self, "prefetched_books"):
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return filter(
lambda book: book.consumable and not book.previously_acquired,
self.prefetched_books,
)
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return self.book_set.filter(consumable=True, previously_acquired=False)
@property
def non_acquired_consumable_count(self):
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if hasattr(self, "prefetched_books"):
return len(list(self.non_acquired_consumables))
return self.non_acquired_consumables.count()
@property
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def non_acquired_consumable_price(self):
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if hasattr(self, "prefetched_books"):
return sum(map(lambda book: book.price, self.non_acquired_consumables))
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return self.non_acquired_consumables.aggregate(Sum("price")).get(
"price__sum", 0
)
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@property
def non_acquired_books(self):
if hasattr(self, "prefetched_books"):
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return filter(
lambda book: not book.consumable and not book.previously_acquired,
self.prefetched_books,
)
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return self.book_set.filter(consumable=False, previously_acquired=False)
@property
def non_acquired_book_count(self):
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if hasattr(self, "prefetched_books"):
return len(list(self.non_acquired_books))
return self.non_acquired_books.count()
@property
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def non_acquired_book_price(self):
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if hasattr(self, "prefetched_books"):
return sum(map(lambda book: book.price, self.non_acquired_books))
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return self.non_acquired_books.aggregate(Sum("price")).get("price__sum", 0)
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@property
def non_acquired_items(self):
if hasattr(self, "prefetched_books"):
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return filter(
lambda book: not book.previously_acquired, self.prefetched_books
)
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return self.book_set.filter(previously_acquired=False)
@property
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def non_acquired_total_price(self):
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if hasattr(self, "prefetched_books"):
return sum(map(lambda book: book.price, self.non_acquired_items))
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return self.non_acquired_items.aggregate(Sum("price")).get("price__sum", 0)
class Editor(BaseModel):
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class Meta:
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verbose_name = "éditeur"
verbose_name_plural = "éditeurs"
ordering = ["name"]
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name = models.CharField("nom", max_length=100)
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def __str__(self):
return self.name
def isbn_validator(value):
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regex = re.compile(r"(\d-?){10,13}X?")
if not regex.match(value):
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raise ValidationError(
"%(value)s n'est pas un ISBN valide.", params={"value": value}
)
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def positive_float_validator(value):
try:
value = float(value)
except ValueError:
raise ValidationError("%(value)s doit être un nombre décimal")
if value < 0:
raise ValidationError("%(value)s doit être un nombre positif")
class Book(BaseModel):
class Meta:
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verbose_name = "livre"
verbose_name_plural = "livres"
teacher = models.ForeignKey(
verbose_name="coordonnateur", to=Teacher, on_delete=models.PROTECT, null=True
)
level = models.ForeignKey(
verbose_name="classe", to=Level, on_delete=models.PROTECT, null=True
)
field = models.CharField("discipline", max_length=200)
title = models.TextField("titre")
authors = models.TextField("auteurs")
editor = models.ForeignKey(
verbose_name="éditeur", to=Editor, on_delete=models.PROTECT, null=True
)
other_editor = models.CharField(verbose_name="préciser", max_length=100, blank=True)
publication_year = models.PositiveIntegerField("année de publication")
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isbn = models.CharField(
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"ISBN/EAN du manuel élève (hors specimen)",
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max_length=20,
help_text="Format attendu : 10 ou 13 chiffres, éventuellement séparés par des tirets et éventuellement "
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"suivis de la lettre <code>X</code>. La recherche sur Decitre ne fonctionnera qu'avec un code ISBN à "
"13 chiffres (ou EAN)",
validators=[isbn_validator],
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)
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price = models.FloatField("prix", validators=[positive_float_validator])
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YES_NO_CHOICE = (
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(None, "------------"),
(False, "Non"),
(True, "Oui"),
)
previously_acquired = models.BooleanField(
"manuel acquis précédemment par l'élève",
choices=YES_NO_CHOICE,
blank=False,
default=None,
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)
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done = models.BooleanField("Traité", blank=True, default=False)
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comments = models.TextField(
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"commentaires",
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blank=True,
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help_text="Ce message sera visible par la documentaliste.",
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)
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consumable = models.BooleanField(
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"consommable",
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help_text="Exemple : un cahier d'exercices est un consommable",
choices=YES_NO_CHOICE,
blank=False,
default=None,
)
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@property
def previously_acquired_text(self):
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if self.previously_acquired:
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return "Oui"
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else:
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return "Non"
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@property
def consumable_text(self):
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if self.consumable:
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return "Oui"
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else:
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return "Non"
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def __str__(self):
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return f"{self.title} ({self.authors}) - {self.isbn}"
def get_absolute_url(self):
from django.urls import reverse
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return reverse(
"edit_book", kwargs={"teacher_pk": str(self.teacher.pk), "pk": str(self.pk)}
)
def update_from_decitre(self):
decitre_data = self.fetch_from_decitre(self.isbn)
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self.title = decitre_data.get("title")
self.authors = decitre_data.get("authors")
self.price = decitre_data.get("price")
self.publication_year = decitre_data.get("year")
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editor = decitre_data.get("editor")
potential_editor = (
Editor.objects.filter(name__iexact=editor).first()
or Editor.objects.filter(name__icontains=editor).first()
)
if potential_editor:
self.other_editor = ""
else:
potential_editor = Editor.objects.get(name__istartswith="autre")
self.other_editor = editor
self.editor = potential_editor
self.save()
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@property
def decitre_url(self):
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isbn = self.isbn.strip().replace("-", "")
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if not validate_isbn(isbn) or len(isbn) == 10:
return ""
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return f"https://www.decitre.fr/livres/{isbn}.html"
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@staticmethod
def fetch_from_decitre(isbn: str):
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isbn = isbn.strip().replace("-", "")
if not validate_isbn(isbn):
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raise ISBNError({"error": "L'ISBN saisi n'est pas valide."})
if len(isbn) == 10:
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raise ISBNError(
{
"error": "La recherche sur Decitre ne fonctionne qu'avec un ISBN 13 (ou EAN)."
}
)
try:
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res = requests.get(f"https://www.decitre.fr/livres/{isbn}.html", timeout=10)
except requests.exceptions.Timeout as exc:
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raise ISBNError(
{
"error": "Decitre n'a pas répondu dans les temps. Message : {}".format(
str(exc)
)
}
)
try:
res.raise_for_status()
except Exception as exc:
message = (
"Erreur lors de la recherche. Il se peut que le livre n'existe pas dans la base de connaissances "
"de Decitre ou que vous ayez mal saisi l'ISBN. Vous pouvez toujours saisir "
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"les informations du livre à la main. Message : {}"
).format(str(exc))
raise ISBNError({"error": message})
decitre_soup = bs4.BeautifulSoup(res.text, "html.parser")
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title = decitre_soup.select("h1.product-title")
if title:
title = title[0]
if title.span:
title.span.extract()
title = title.get_text(strip=True)
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authors = decitre_soup.select(".authors")
if authors:
authors = authors[0]
authors = authors.get_text(strip=True)
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price = decitre_soup.select(".fp-top--add-to-cart div.price span.final-price")
if price:
price = price[0]
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price = price.get_text().replace("", "").replace(",", ".").strip()
year = None
editor = None
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extra_info = decitre_soup.select(".informations-container")
logger.debug("raw extra_info")
logger.debug(extra_info)
if not extra_info:
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logger.debug("#fiche-technique")
extra_info = decitre_soup.select("#fiche-technique")
logger.debug("raw extra_info fiche technique")
logger.debug(extra_info)
if extra_info:
extra_info = extra_info[0].get_text(strip=True)
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logger.debug("extra_info")
logger.debug(extra_info)
matches = re.search(
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r"Date de parution(?: :)?\d{2}/\d{2}/(?P<year>\d{4})Editeur(?: :)?(?P<editor>.+?)(?:ISBN|Collection)",
extra_info,
)
if matches:
groups = matches.groupdict()
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year = groups.get("year")
editor = groups.get("editor").strip()
return {
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"title": title,
"authors": authors,
"isbn": isbn,
"price": float(price) if price else None,
"year": year,
"editor": editor,
}
class SuppliesRequirement(BaseModel):
class Meta:
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verbose_name = "demande de fournitures"
verbose_name_plural = "demandes de fournitures"
teacher = models.ForeignKey(
verbose_name="coordonnateur", to=Teacher, on_delete=models.PROTECT, null=True
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)
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level = models.ForeignKey(
verbose_name="classe", to=Level, on_delete=models.PROTECT, null=True
)
field = models.CharField("discipline", max_length=50)
supplies = models.TextField("fournitures")
done = models.BooleanField("Traité", blank=True, default=False)
def __str__(self):
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return f"{self.supplies} pour {self.level} ({self.teacher})"
class CommonSupply(BaseModel):
class Meta:
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verbose_name = "fourniture commune"
verbose_name_plural = "fournitures communes"
ordering = (
"order",
"name",
)
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name = models.CharField("nom", max_length=200)
order = models.IntegerField("ordre")
def __str__(self):
return self.name