Merge remote-tracking branch 'origin/feature/nearest_restaurants' into develop

# Conflicts:
#	apps/establishment/views.py

apps/establishment/models.py

@@ -102,6 +102,20 @@ class EstablishmentQuerySet(models.QuerySet):
             default=False,
             output_field=models.BooleanField(default=False)))
 
+    def by_distance_from_point(self, center, radius, unit='m'):
+        """
+        Returns nearest establishments
+
+        :param center: point from which to find nearby establishments
+        :param radius: the maximum distance within the radius of which to look for establishments
+        :return: all establishments within the specified radius of specified point
+        :param unit: length unit e.g. m, km. Default is 'm'.
+        """
+
+        from django.contrib.gis.measure import Distance
+        kwargs = {unit: radius}
+        return self.filter(address__coordinates__distance_lte=(center, Distance(**kwargs)))
+
 
 class Establishment(ProjectBaseMixin, ImageMixin, TranslatedFieldsMixin):
     """Establishment model."""

apps/establishment/urls/common.py

@@ -5,7 +5,6 @@ from establishment import views
 
 app_name = 'establishment'
 
-
 urlpatterns = [
     path('', views.EstablishmentListView.as_view(), name='list'),
     path('tags/', views.EstablishmentTagListView.as_view(), name='tags'),
@@ -16,5 +15,5 @@ urlpatterns = [
     path('<int:pk>/comments/<int:comment_id>/', views.EstablishmentCommentRUDView.as_view(),
          name='rud-comment'),
     path('<int:pk>/favorites/', views.EstablishmentFavoritesCreateDestroyView.as_view(),
-         name='add-favorites'),
-]
+         name='add-favorites')
+]

apps/establishment/urls/mobile.py

@@ -0,0 +1,11 @@
+"""Establishment url patterns."""
+from django.urls import path
+
+from establishment import views
+from establishment.urls.common import urlpatterns as common_urlpatterns
+
+urlpatterns = [
+    path('geo/', views.EstablishmentNearestRetrieveView.as_view(), name='nearest-establishments-list')
+]
+
+urlpatterns.extend(common_urlpatterns)

apps/establishment/views.py

@@ -120,6 +120,25 @@ class EstablishmentFavoritesCreateDestroyView(generics.CreateAPIView, generics.D
         return obj
 
 
+class EstablishmentNearestRetrieveView(EstablishmentMixin, JWTGenericViewMixin, generics.ListAPIView):
+    """Resource for getting list of nearest establishments."""
+    serializer_class = serializers.EstablishmentListSerializer
+    filter_class = filters.EstablishmentFilter
+
+    def get_queryset(self):
+        """Overrided method 'get_queryset'."""
+        from django.contrib.gis.geos import Point
+
+        center = Point(float(self.request.query_params["lat"]), float(self.request.query_params["lon"]))
+        radius = float(self.request.query_params["radius"])
+        unit = self.request.query_params.get("unit", None)
+        by_distance_from_point_kwargs = {"center": center, "radius": radius, "unit": unit}
+        return super(EstablishmentNearestRetrieveView, self).get_queryset() \
+            .by_distance_from_point(**{k: v for k, v in by_distance_from_point_kwargs.items() if v is not None}) \
+            .by_country_code(code=self.request.country_code) \
+            .annotate_in_favorites(user=self.request.user)
+
+
 class EstablishmentTagListView(generics.ListAPIView):
     """List view for establishment tags."""
     serializer_class = serializers.EstablishmentTagListSerializer

project/urls/mobile.py

@@ -3,10 +3,11 @@ from django.urls import path, include
 app_name = 'mobile'
 
 urlpatterns = [
+    path('establishments/', include('establishment.urls.mobile')),
     # path('account/', include('account.urls.web')),
     # path('advertisement/', include('advertisement.urls.web')),
     # path('collection/', include('collection.urls.web')),
     # path('establishments/', include('establishment.urls.web')),
     # path('news/', include('news.urls.web')),
     # path('partner/', include('partner.urls.web')),
-]
+]