med/media/forms.py

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# -*- mode: python; coding: utf-8 -*-
# Copyright (C) 2017-2019 by BDE ENS Paris-Saclay
# SPDX-License-Identifier: GPL-3.0-or-later
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import json
import urllib.request
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from django.forms import ModelForm
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from .models import Emprunt
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class EmpruntForm(ModelForm):
class Meta:
model = Emprunt
fields = ['media']
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class MediaAdminForm(ModelForm):
def __init__(self, *args, **kwargs):
super().__init__(*args, **kwargs)
self.fields['isbn'].widget.template_name = "media/isbn_button.html"
def download_data(self, isbn):
"""
Download data from ISBN
"""
api_url = "https://openlibrary.org/api/books?bibkeys=ISBN:{}" \
"&format=json&jscmd=data".format(isbn)
with urllib.request.urlopen(api_url) as url:
data = json.loads(url.read().decode())
if data and data['ISBN:' + isbn]:
data = data['ISBN:' + isbn]
# Fill the data
# TODO implement authors
if data['title']:
self.cleaned_data['title'] = data['title']
self.cleaned_data['side_title'] = data['title']
if data['subtitle']:
self.cleaned_data['subtitle'] = data['subtitle']
if data['url']:
self.cleaned_data['external_url'] = data['url']
if data['number_of_pages']:
self.cleaned_data['number_of_pages'] = \
data['number_of_pages']
def clean(self):
"""
If user fetch ISBN data, then download data before validating the form
"""
if "_continue" in self.request.POST:
isbn = self.cleaned_data.get('isbn')
if isbn:
# ISBN is present
self.download_data(isbn)
return super().clean()