Prepare mailing list to be filtered by domain.

Will work when backend supports it.

musician/templates/musician/mailinglists.html

@@ -2,8 +2,11 @@
 {% load i18n %}
 
 {% block content %}
+{% if active_domain %}
+<a class="btn-arrow-left" href="{% url 'musician:mailing-lists' %}">{% trans "Go to global" %}</a>
+{% endif %}
 
-<h1 class="service-name">{{ service.verbose_name }}</h1>
+<h1 class="service-name">{{ service.verbose_name }}{% if active_domain %} <span class="font-weight-light">{% trans "for" %} {{ active_domain.name }}</span>{% endif %}</h1>
 <p class="service-description">{{ service.description }}</p>
 
 <table class="table service-list">

musician/views.py

@@ -127,10 +127,17 @@ class ServiceListView(CustomContextMixin, ExtendedPaginationMixin, UserTokenRequ
             raise ImproperlyConfigured(
                 "ServiceListView requires a definiton of 'service'")
 
+        queryfilter = self.get_queryfilter()
         json_qs = self.orchestra.retrieve_service_list(
-            self.service_class.api_name)
+            self.service_class.api_name,
+            querystring=queryfilter,
+        )
         return [self.service_class.new_from_json(data) for data in json_qs]
 
+    def get_queryfilter(self):
+        """Does nothing by default. Should be implemented on subclasses"""
+        return ''
+
     def get_context_data(self, **kwargs):
         context = super().get_context_data(**kwargs)
         context.update({
@@ -197,6 +204,26 @@ class MailingListsView(ServiceListView):
     template_name = "musician/mailinglists.html"
 
 
+    def get_context_data(self, **kwargs):
+        context = super().get_context_data(**kwargs)
+        domain_id = self.request.GET.get('domain')
+        if domain_id:
+            context.update({
+                'active_domain': self.orchestra.retrieve_domain(domain_id)
+            })
+        return context
+
+    def get_queryfilter(self):
+        """Retrieve query params (if any) to filter queryset"""
+        # TODO(@slamora): this is not working because backend API
+        #   doesn't support filtering by domain
+        domain_id = self.request.GET.get('domain')
+        if domain_id:
+            return "domain={}".format(domain_id)
+
+        return ''
+
+
 class DatabasesView(ServiceListView):
     template_name = "musician/databases.html"
     service_class = DatabaseService