Add subscriptions API piece.

Change-Id: I9cc8707bbadb8def65b250a5336230d0f32a7630

zaqar_ui/api/rest/zaqar.py

@@ -89,3 +89,42 @@ class Queues(generic.View):
                     'total': 0,
                     'metadata': new_queue._metadata}
         return rest_utils.CreatedResponse(location, response)
+
+
+@urls.register
+class Subscriptions(generic.View):
+    """API for queues"""
+    url_regex = r'zaqar/queues/(?P<queue_name>[^/]+)/subscriptions/$'
+
+    @rest_utils.ajax()
+    def get(self, request, queue_name):
+        """Get a list of the Subscriptions for a queue."""
+        return zaqar.subscription_list(request, queue_name)
+
+    @rest_utils.ajax(data_required=True)
+    def delete(self, request, queue_name):
+        """Delete one or more queue by name.
+
+        Returns HTTP 204 (no content) on successful deletion.
+        """
+        zaqar.subscription_delete(request, queue_name, request.DATA)
+
+    @rest_utils.ajax(data_required=True)
+    def put(self, request, queue_name):
+        """Create a new subscription.
+
+        Returns the new queue object on success.
+        """
+        return zaqar.subscription_create(request, queue_name, request.DATA)
+
+
+@urls.register
+class Subscription(generic.View):
+    """API for retrieving a single subscription"""
+    url_regex = r'zaqar/queues/(?P<queue_name>[^/]+)/' \
+                r'subscription/(?P<subscriber>[^/]+)/$'
+
+    @rest_utils.ajax(data_required=True)
+    def post(self, request, queue_name, subscriber):
+        zaqar.subscription_update(request, queue_name,
+                                  {'id': subscriber}, request.DATA)

zaqar_ui/api/zaqar.py

@@ -83,8 +83,28 @@ def queue_get(request, queue_name):
     return zaqarclient(request).queue(queue_name, auto_create=False)
 
 
-def queue_subscribe(request, subscriber, ttl=None, options={}):
-    # Popup a modal form, user can input subscriber, ttl and options to
-    # subscribe the queue.
-    # subscriber could be an URL or email address.
-    pass
+def subscription_list(request, queue_name):
+    return [{'subscriber': s.subscriber,
+             'id': s.id,
+             'ttl': s.ttl,
+             'options': s.options}
+            for s in zaqarclient(request).subscriptions(queue_name)]
+
+
+def subscription_create(request, queue_name, sub_data):
+    subscription = zaqarclient(request).subscription(queue_name, **sub_data)
+    return {'subscriber': subscription.subscriber,
+            'id': subscription.id,
+            'ttl': subscription.ttl,
+            'options': subscription.options}
+
+
+def subscription_delete(request, queue_name, sub_data):
+    subscription = zaqarclient(request).subscription(queue_name, **sub_data)
+    subscription.delete()
+
+
+def subscription_update(request, queue_name, old_data, new_data):
+    subscription = zaqarclient(request).subscription(queue_name, **old_data)
+    subscription.update(new_data)
+    return subscription