(BSR)[API] feat: allocine api: showtimes: allow None language

Allow None to be a showtime language... and remove it from the languages
list. It will avoid useless validation errors.

api/src/pcapi/connectors/serialization/allocine_serializers.py

@@ -358,6 +358,12 @@ class AllocineShowtime(pydantic.BaseModel):
     def get_first_projection_mode(cls, projection: list[AllocineShowtimeProjection]) -> AllocineShowtimeProjection:
         return projection[0]
 
+    @pydantic.field_validator("languages", mode="before")
+    def drop_none_values(cls, languages: list | None) -> list | None:
+        if languages:
+            return [l for l in languages if l is not None]
+        return languages
+
 
 class AllocineMovieShowtime(pydantic.BaseModel):
     movie: AllocineMovie

api/tests/connectors/api_allocine_test.py

@@ -148,7 +148,20 @@ def test_should_drop_invalid_showtimes_and_move_on(self, requests_mock):
         valid_edge = copy.deepcopy(payload["movieShowtimeList"]["edges"][0])
         payload["movieShowtimeList"]["edges"].append(valid_edge)
         # one and only movie becomes invalid because of one showtime language
-        payload["movieShowtimeList"]["edges"][0]["node"]["showtimes"][0]["languages"] = [None]
+        payload["movieShowtimeList"]["edges"][0]["node"]["showtimes"][0]["languages"] = ["invalid"]
+
+        requests_mock.get.return_value = MockedResponse(data=payload, status_code=200)
+        api_response = get_movies_showtimes_from_allocine("does not matter")
+
+        expected_result = copy.deepcopy(fixtures.MOVIE_SHOWTIME_LIST)
+        assert api_response == allocine_serializers.AllocineMovieShowtimeListResponse.model_validate(expected_result)
+
+    @patch("pcapi.connectors.api_allocine.requests")
+    def test_accept_showtimes_with_a_none_language(self, requests_mock):
+        payload = copy.deepcopy(fixtures.MOVIE_SHOWTIME_LIST)
+
+        # invalid language should be filtered and the edge kept
+        payload["movieShowtimeList"]["edges"][0]["node"]["showtimes"][0]["languages"].append(None)
 
         requests_mock.get.return_value = MockedResponse(data=payload, status_code=200)
         api_response = get_movies_showtimes_from_allocine("does not matter")