add view to list comments of a changeset

README.rst

@@ -60,6 +60,7 @@ DJANGO_NON_STAFF_USER_THROTTLE_RATE     NON_STAFF_USER_THROTTLE_RATE      3/min
 OAUTH_REDIRECT_URI                      OAUTH_REDIRECT_URI                http://localhost:8000/oauth-landing.html  http://localhost:8000/oauth-landing.html
 OSMCHA_FRONTEND_VERSION                 OSMCHA_FRONTEND_VERSION           oh-pages                                  oh-pages
 DJANGO_ENABLE_CHANGESET_COMMENTS        ENABLE_POST_CHANGESET_COMMENTS    False                                     False
+DJANGO_OSM_COMMENTS_API_KEY             OSM_COMMENTS_API_KEY              ''                                        ''
 ======================================= ================================= ========================================= ===========================================
 
 You can set each of these variables with:

config/settings/common.py

@@ -324,6 +324,9 @@
 # are reviewed
 ENABLE_POST_CHANGESET_COMMENTS = env('DJANGO_ENABLE_CHANGESET_COMMENTS', default=False)
 
+# Authorization token to access the OSM-COMMENTS-API
+OSM_COMMENTS_API_KEY = env('DJANGO_OSM_COMMENTS_API_KEY', default='')
+
 # Your common stuff: Below this line define 3rd party library settings
 REST_FRAMEWORK = {
     'DEFAULT_AUTHENTICATION_CLASSES': (

osmchadjango/changeset/tests/test_changeset_views.py

@@ -1263,3 +1263,52 @@ def test_set_harmful_by_staff_user(self):
                 )
         self.assertEqual(response.status_code, 200)
         self.assertEqual(Changeset.objects.filter(checked=True).count(), 5)
+
+class TestChangesetCommentsView(APITestCase):
+    def setUp(self):
+        self.changeset = HarmfulChangesetFactory(
+            id=55736682,
+            )
+        HarmfulChangesetFactory(id=1343)
+        self.user = User.objects.create_user(
+            username='test',
+            password='password',
+            email='[email protected]',
+            )
+        UserSocialAuth.objects.create(
+            user=self.user,
+            provider='openstreetmap',
+            uid='123123',
+            )
+
+    def test_unauthenticated_changeset_detail_response(self):
+        response = self.client.get(
+            reverse('changeset:comment-list', args=[self.changeset.id])
+            )
+        self.assertEqual(response.status_code, 401)
+
+    def test_authenticated_changeset_detail_response(self):
+        self.client.login(username=self.user.username, password='password')
+        response = self.client.get(
+            reverse('changeset:comment', args=[self.changeset.id])
+            )
+
+        self.assertEqual(response.status_code, 200)
+        self.assertTrue(len(response.data) > 0)
+
+    def test_changeset_does_not_exist(self):
+        self.client.login(username=self.user.username, password='password')
+        response = self.client.get(
+            reverse('changeset:comment', args=[1234])
+            )
+
+        self.assertEqual(response.status_code, 404)
+
+    def test_changeset_without_comments(self):
+        self.client.login(username=self.user.username, password='password')
+        response = self.client.get(
+            reverse('changeset:comment', args=[1343])
+            )
+
+        self.assertEqual(response.status_code, 200)
+        self.assertTrue(response.data, [])

osmchadjango/changeset/urls.py

@@ -72,7 +72,7 @@
     re_path(
         r'^changesets/(?P<pk>\w+)/comment/$',
         view=views.ChangesetCommentAPIView.as_view(
-            {'post': 'post_comment'}
+            {'post': 'post_comment', 'get': 'get_comments'}
             ),
         name='comment'
     ),

osmchadjango/changeset/views.py

@@ -24,6 +24,7 @@
 from rest_framework_gis.pagination import GeoJsonPagination
 from rest_framework_csv.renderers import CSVRenderer
 from rest_framework.exceptions import APIException
+import requests
 
 from .models import Changeset, UserWhitelist, SuspicionReasons, Tag
 from .filters import ChangesetFilter
@@ -465,13 +466,27 @@ def get_queryset(self):
 
 
 class ChangesetCommentAPIView(ModelViewSet):
-    """Post a comment to a changeset in the OpenStreetMap website."""
     queryset = Changeset.objects.all()
     permission_classes = (IsAuthenticated,)
     serializer_class = ChangesetCommentSerializer
 
+    @detail_route(methods=['get'])
+    def get_comments(self, request, pk):
+        "List comments received by a changeset on the OpenStreetMap website."
+        self.changeset = self.get_object()
+        headers = {
+            'apiKey': settings.OSM_COMMENTS_API_KEY,
+            'Content-Type': 'application/json'
+        }
+        data = requests.get(
+            'https://osm-comments-api.mapbox.com/api/v1/changesets/{}'.format(pk),
+            headers=headers
+            )
+        return data.get('properties').get('comments')
+
     @detail_route(methods=['post'])
     def post_comment(self, request, pk):
+        "Post a comment to a changeset in the OpenStreetMap website."
         self.changeset = self.get_object()
         serializer = self.get_serializer(data=request.data)
         if serializer.is_valid():