import logging from threading import Thread import requests from django.conf import settings from django.contrib.admin.models import LogEntry from django.contrib.sessions.models import Session from django.db import models from django.db.models.signals import post_save from django.dispatch import receiver from oidc_provider.models import Token from djangoldp.fields import LDPUrlField from djangoldp.models import Model from djangoldp.permissions import InboxPermissions class Notification(Model): user = models.ForeignKey(settings.AUTH_USER_MODEL, related_name='inbox') author_user = LDPUrlField() object = LDPUrlField() type = models.CharField(max_length=255) summary = models.TextField() date = models.DateTimeField(auto_now_add=True) read = models.BooleanField() class Meta: permissions = ( ('view_notification', 'Read'), ('control_notification', 'Control'), ) permission_classes=[InboxPermissions] ordering = ['date'] def __str__(self): return '{}'.format(self.type) class Subscription(Model): object = models.URLField() inbox = models.URLField() class Meta: permissions = ( ('view_notification', 'Read'), ('control_notification', 'Control'), ) def __str__(self): return '{}'.format(self.object) # --- SUBSCRIPTION SYSTEM --- @receiver(post_save, dispatch_uid="callback_notif") def send_notification(sender, instance, **kwargs): if (sender != Notification and sender != LogEntry and sender != Session and sender != Token): threads = [] url = settings.BASE_URL + Model.resource_id(instance) + '/' for subscription in Subscription.objects.filter(object=url): process = Thread(target=send_request, args=[subscription.inbox, url]) process.start() threads.append(process) def send_request(target, object_iri): try: req = requests.post(target, json={"@context": "https://cdn.happy-dev.fr/owl/hdcontext.jsonld", "object": object_iri, "type": "update"}, headers={"Content-Type": "application/ld+json"}) except: logging.error('Djangoldp_notifications: Error with request') return True