dynamic filters

apps/tag/views.py

@@ -3,6 +3,9 @@ from django.conf import settings
 from rest_framework import generics, mixins, permissions, status, viewsets
 from rest_framework.decorators import action
 from rest_framework.response import Response
+from rest_framework.serializers import ValidationError
+from django.utils.translation import gettext_lazy as _
+from search_indexes import views as search_views
 
 from location.models import WineRegion
 from product.models import ProductType
@@ -82,7 +85,7 @@ class FiltersTagCategoryViewSet(TagCategoryViewSet):
         if params_type == 'restaurant':
             additional_flags += ['toque_number', 'works_noon', 'works_evening', 'works_now']
 
-        elif params_type == 'winery':
+        elif params_type in ['winery', 'wine']:
             additional_flags += ['wine_region']
 
         elif params_type == 'artisan':
@@ -175,12 +178,42 @@ class FiltersTagCategoryViewSet(TagCategoryViewSet):
             }
             result_list.append(works_at_weekday)
 
-        if 'tags_id__in' in query_params:
-            # filtering by params_type and tags id
-            # todo: result_list.append( filtering_data )
-            pass
+        search_view_class = self.define_search_view_by_request(request)
+        facets = search_view_class.as_view({'get': 'list'})(self.mutate_request(self.request)).data['facets']
+        return Response(self.remove_empty_filters(result_list, facets))
 
-        return Response(result_list)
+    @staticmethod
+    def mutate_request(request):
+        """Remove all filtering get params and remove s_ from the rest of them"""
+        request.GET._mutable = True
+        for name in request.query_params.copy().keys():
+            value = request.query_params.pop(name)
+            if name.startswith('s_'):
+                request.query_params[name[2:]] = value[0]
+        request.GET._mutable = False
+        return request._request
+
+    @staticmethod
+    def define_search_view_by_request(request):
+        request.GET._mutable = True
+        if request.query_params.get('items'):
+            items = request.query_params.pop('items')[0]
+        else:
+            raise ValidationError({'detail': _('Missing required "items" parameter')})
+        item_to_class = {
+            'news': search_views.NewsDocumentViewSet,
+            'establishments': search_views.EstablishmentDocumentViewSet,
+            'products': search_views.ProductDocumentViewSet,
+        }
+        klass = item_to_class.get(items)
+        if klass is None:
+            raise ValidationError({'detail': _('news/establishments/products')})
+        request.GET._mutable = False
+        return klass
+
+    @staticmethod
+    def remove_empty_filters(filters, facets):
+        return filters
 
 
 # BackOffice user`s views & viewsets