Add bbox filtering to search

Add possibility to filter search results by bounding box. This is for
when only results in given area are wanted.

services/search/api.py

@@ -22,11 +22,13 @@
 import re
 from itertools import chain
 
+from django.contrib.gis.gdal import SpatialReference
 from django.db import connection, reset_queries
 from django.db.models import Count
 from drf_spectacular.utils import extend_schema, OpenApiParameter
 from munigeo import api as munigeo_api
 from munigeo.models import Address, AdministrativeDivision
+from munigeo.utils import get_default_srid
 from rest_framework import serializers, status
 from rest_framework.exceptions import ParseError
 from rest_framework.generics import GenericAPIView
@@ -344,6 +346,13 @@ def to_representation(self, obj):
             required=False,
             type=str,
         ),
+        OpenApiParameter(
+            name="bbox",
+            location=OpenApiParameter.QUERY,
+            description="Bounding box in the format 'left,bottom,right,top'.",
+            required=False,
+            type=str,
+        ),
     ],
     description="Search for units, services, service nodes, addresses and administrative divisions.",
 )
@@ -587,6 +596,16 @@ def get(self, request):
                 if services[0]:
                     units_qs = units_qs.filter(services__in=services)
 
+            if "bbox" in self.request.query_params:
+                bbox = self.request.query_params["bbox"]
+                if "bbox_srid" in self.request.query_params:
+                    bbox_srid = self.request.query_params["bbox_srid"]
+                else:
+                    bbox_srid = get_default_srid()
+                ref = SpatialReference(bbox_srid)
+                bbox_filter = munigeo_api.build_bbox_filter(ref, bbox, "location")
+                units_qs = units_qs.filter(**bbox_filter)
+
             if units_order_list:
                 units_qs = units_qs.annotate(num_services=Count("services")).order_by(
                     *units_order_list

services/search/tests/conftest.py

@@ -96,6 +96,7 @@ def units(
         last_modified_time=now(),
         municipality=municipality,
         department=department,
+        location=Point(24.941387, 60.17103, srid=4326),  # Helsinki center
     )
     # Add service Halli
     unit.services.add(4)

services/search/tests/test_api.py

@@ -264,3 +264,23 @@ def test_search_with_vertical_bar_in_query(api_client, units):
     url = reverse("search") + "?q=|terveysasema||''||'"
     response = api_client.get(url)
     assert response.status_code == 200
+
+
+@pytest.mark.django_db
+def test_search_with_bbox_parameter(api_client, units):
+    """
+    When bbox parameter is given, only units within the bounding box should be returned.
+    """
+    url = reverse("search") + "?q=halli&type=unit"
+    response = api_client.get(url)
+    results = response.json()["results"]
+    assert len(results) == 3
+
+    url = (
+        reverse("search")
+        + "?q=halli&type=unit&bbox=24.93545,60.16952,24.95190,60.17800&bbox_srid=4326"
+    )
+    response = api_client.get(url)
+    results = response.json()["results"]
+    assert len(results) == 1
+    assert results[0]["name"]["fi"] == "Jäähalli"