kfet.open

kfet.open app
- Base data (raw_open, last_update...) is stored and shared through cache system.
- 2 websockets groups: one for team users, one for other users.
- UI is initialized and kept up-to-date with WS.
- raw_open and force_close can be updated with standard HTTP requests.
  At this time, there isn't any restriction on raw_open view. Common sense tell us
  to change this behavior.

Misc
- Clean channels routing.
- 'PermConsumerMixin': user who sent the message is available as argument in
connection_groups method, which returns groups to which the user should be
appended on websocket connection (and discarded on disconnection).
- New kfet.utils module: should be used for mixins, whatever is useful and not concerns
the kfet app.
- Clean JS dependencies.

kfet/consumers.py

@@ -1,53 +1,6 @@
 # -*- coding: utf-8 -*-
 
-from django.core.serializers.json import json, DjangoJSONEncoder
-
-from channels.generic.websockets import JsonWebsocketConsumer
-
-
-class DjangoJsonWebsocketConsumer(JsonWebsocketConsumer):
-    """Custom Json Websocket Consumer.
-
-    Encode to JSON with DjangoJSONEncoder.
-
-    """
-
-    @classmethod
-    def encode_json(cls, content):
-        return json.dumps(content, cls=DjangoJSONEncoder)
-
-
-class PermConsumerMixin(object):
-    """Add support to check permissions on Consumers.
-
-    Attributes:
-        perms_connect (list): Required permissions to connect to this
-            consumer.
-
-    """
-    http_user = True  # Enable message.user
-    perms_connect = []
-
-    def connect(self, message, **kwargs):
-        """Check permissions on connection."""
-        if message.user.has_perms(self.perms_connect):
-            super().connect(message, **kwargs)
-        else:
-            self.close()
-
-
-class KfetOpen(JsonWebsocketConsumer):
-    def connection_groups(self, **kwargs):
-        return ['kfet.is_open']
-
-    def connect(self, message, **kwargs):
-        pass
-
-    def receive(self, content, **kwargs):
-        pass
-
-    def disconnect(self, message, **kwargs):
-        pass
+from .utils import DjangoJsonWebsocketConsumer, PermConsumerMixin
 
 
 class KPsul(PermConsumerMixin, DjangoJsonWebsocketConsumer):