import requests import logging import datetime from threading import Thread from django.db import models from django.conf import settings from django.db.models.signals import post_save from django.dispatch import receiver from django.contrib.auth.models import User from django.contrib.admin.models import LogEntry from djangoldp.models import Model class Notification(models.Model): user = models.ForeignKey(settings.AUTH_USER_MODEL, related_name='inbox') author_user = models.URLField() object = models.URLField() 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'), ) ordering = ['date'] def __str__(self): return '{}'.format(self.type) class Subscription(models.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): threads = [] url = settings.BASE_URL + Model.get_absolute_url(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): try: req=requests.post(target, json={"@context":"https://cdn.happy-dev.fr/owl/hdcontext.jsonld", "object": object, "type": "system", "read": False}, headers={"Content-Type": "application/ld+json"}) except: logging.error('Djangoldp_notifications: Error with request') return True