214 lines
8.9 KiB
Python
214 lines
8.9 KiB
Python
import logging
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import requests
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from django.conf import settings
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from django.core.mail import send_mail
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from django.core.exceptions import ObjectDoesNotExist
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from django.db import models
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from django.db.models.signals import post_save, post_delete
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from django.dispatch import receiver
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from django.template import loader
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from django.urls import NoReverseMatch, get_resolver
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from django.utils.translation import ugettext_lazy as _
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from djangoldp.fields import LDPUrlField
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from djangoldp.models import Model
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from threading import Thread
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from djangoldp_notification.middlewares import MODEL_MODIFICATION_USER_FIELD
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from djangoldp_notification.permissions import InboxPermissions, SubscriptionsPermissions
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from djangoldp_notification.views import LDPNotificationsViewSet
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class Notification(Model):
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user = models.ForeignKey(settings.AUTH_USER_MODEL, related_name='inbox', on_delete=models.deletion.CASCADE)
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author = LDPUrlField()
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object = LDPUrlField()
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type = models.CharField(max_length=255)
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summary = models.TextField()
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date = models.DateTimeField(auto_now_add=True)
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unread = models.BooleanField(default=True)
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class Meta(Model.Meta):
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owner_field = 'user'
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ordering = ['-date']
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permission_classes = [InboxPermissions]
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anonymous_perms = ['add']
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authenticated_perms = ['inherit']
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owner_perms = ['view', 'change', 'control']
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view_set = LDPNotificationsViewSet
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def __str__(self):
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return '{}'.format(self.type)
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def save(self, *args, **kwargs):
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# I cannot send a notification to myself
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if self.author.startswith(settings.SITE_URL):
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try:
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# author is a WebID.. convert to local representation
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author = Model.resolve(self.author.replace(settings.SITE_URL, ''))[1]
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except NoReverseMatch:
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author = None
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if author == self.user:
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return
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super(Notification, self).save(*args, **kwargs)
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class Subscription(Model):
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object = models.URLField()
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inbox = models.URLField()
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field = models.CharField(max_length=255, blank=True, null=True,
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help_text='if set to a field name on the object model, the field will be passed instead of the object instance')
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def __str__(self):
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return '{}'.format(self.object)
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class Meta(Model.Meta):
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anonymous_perms = []
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authenticated_perms = ["add", "view", "delete"]
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permission_classes = [SubscriptionsPermissions]
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@receiver(post_save, sender=Subscription, dispatch_uid="nested_subscriber_check")
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def create_nested_subscribers(sender, instance, created, **kwargs):
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# save subscriptions for one-to-many nested fields
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if created and not instance.is_backlink and instance.object.startswith(settings.SITE_URL):
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try:
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# object is a WebID.. convert to local representation
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local = Model.resolve(instance.object.replace(settings.SITE_URL, ''))[0]
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nested_fields = Model.get_meta(local, 'nested_fields', [])
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for nested_field in nested_fields:
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try:
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field = local._meta.get_field(nested_field)
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nested_container = field.related_model
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nested_container_url = Model.absolute_url(nested_container)
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if field.one_to_many:
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# get the nested view set
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nested_url = str(instance.object) + '1/' + nested_field + '/'
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view, args, kwargs = get_resolver().resolve(nested_url.replace(settings.SITE_URL, ''))
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# get the reverse name for the field
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field_name = view.initkwargs['nested_related_name']
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if field_name is not None and field_name != '':
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# check that this nested-field subscription doesn't already exist
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existing_subscriptions = Subscription.objects.filter(object=nested_container_url, inbox=instance.inbox,
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field=field_name)
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# save a Subscription on this container
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if not existing_subscriptions.exists():
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Subscription.objects.create(object=nested_container_url, inbox=instance.inbox, is_backlink=True,
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field=field_name)
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except:
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pass
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except:
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pass
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# --- SUBSCRIPTION SYSTEM ---
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@receiver(post_save, dispatch_uid="callback_notif")
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@receiver(post_delete, dispatch_uid="delete_callback_notif")
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def send_notification(sender, instance, **kwargs):
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if sender != Notification:
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threads = []
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recipients = []
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try:
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url_container = settings.BASE_URL + Model.container_id(instance)
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url_resource = settings.BASE_URL + Model.resource_id(instance)
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except NoReverseMatch:
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return
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# dispatch a notification for every Subscription on this resource
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for subscription in Subscription.objects.filter(models.Q(object=url_resource) | models.Q(object=url_container)):
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if not instance.is_backlink and subscription.inbox not in recipients and \
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(not subscription.is_backlink or not kwargs.get("created")):
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# I may have configured to send the subscription to a foreign key
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if subscription.field is not None and len(subscription.field) > 1:
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try:
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instance = getattr(instance, subscription.field, instance)
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url_resource = settings.BASE_URL + Model.resource_id(instance)
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except NoReverseMatch:
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continue
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except ObjectDoesNotExist:
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continue
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process = Thread(target=send_request, args=[subscription.inbox, url_resource, instance,
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kwargs.get("created", False)])
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process.start()
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threads.append(process)
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recipients.append(subscription.inbox)
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def send_request(target, object_iri, instance, created):
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unknown = str(_("Auteur inconnu"))
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author = getattr(getattr(instance, MODEL_MODIFICATION_USER_FIELD, unknown), "urlid", unknown)
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request_type = "creation" if created else "update"
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try:
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# local inbox
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if target.startswith(settings.SITE_URL):
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user = Model.resolve_parent(target.replace(settings.SITE_URL, ''))
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Notification.objects.create(user=user, object=object_iri, type=request_type, author=author)
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# external inbox
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else:
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json = {
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"@context": settings.LDP_RDF_CONTEXT,
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"object": object_iri,
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"author": author,
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"type": request_type
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}
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requests.post(target, json=json, headers={"Content-Type": "application/ld+json"})
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except Exception as e:
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logging.error('Djangoldp_notifications: Error with request: {}'.format(e))
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return True
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@receiver(post_save, sender=Notification)
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def send_email_on_notification(sender, instance, created, **kwargs):
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if created and instance.summary and getattr(settings,'JABBER_DEFAULT_HOST',False) and instance.user.email:
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# get author name, and store in who
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try:
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# local author
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if instance.author.startswith(settings.SITE_URL):
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who = str(Model.resolve_id(instance.author.replace(settings.SITE_URL, '')))
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# external author
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else:
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who = requests.get(instance.author).json()['name']
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except:
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who = "Personne inconnue"
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# get identifier for resource triggering notification, and store in where
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try:
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if instance.object.startswith(settings.SITE_URL):
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where = str(Model.resolve_id(instance.object.replace(settings.SITE_URL, '')))
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else:
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where = requests.get(instance.object).json()['name']
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except:
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where = "Endroit inconnu"
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if who == where:
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where = "t'a envoyé un message privé"
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else:
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where = "t'a mentionné sur " + where
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on = (getattr(settings, 'INSTANCE_DEFAULT_CLIENT', False) or settings.JABBER_DEFAULT_HOST)
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html_message = loader.render_to_string(
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'email.html',
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{
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'on': on,
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'instance': instance,
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'author': who,
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'object': where
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}
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)
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send_mail(
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'Notification sur ' + on,
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instance.summary,
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(getattr(settings, 'EMAIL_HOST_USER', False) or "noreply@" + settings.JABBER_DEFAULT_HOST),
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[instance.user.email],
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fail_silently=True,
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html_message=html_message
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)
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