Stop saying "areas" when we mean "area_ids"

"areas" normally means an instance of BroadcastArea or similar, so
we should be more accurate to avoid confusion.

app/broadcast_areas/models.py

@@ -184,8 +184,8 @@ class CustomBroadcastArea(BaseBroadcastArea):
 class CustomBroadcastAreas(SerialisedModelCollection):
     model = CustomBroadcastArea
 
-    def __init__(self, *, areas, polygons):
-        self.items = areas
+    def __init__(self, *, area_ids, polygons):
+        self.items = area_ids
         self._polygons = polygons
 
     def __getitem__(self, index):

app/models/broadcast_message.py

@@ -88,7 +88,7 @@ class BroadcastMessage(JSONModel):
 
     @property
     def areas(self):
-        library_areas = self.get_areas(areas=self._dict['areas'])
+        library_areas = self.get_areas(self._dict['areas'])
 
         if library_areas:
             if len(library_areas) != len(self._dict['areas']):
@@ -99,7 +99,7 @@ class BroadcastMessage(JSONModel):
             return library_areas
 
         return CustomBroadcastAreas(
-            areas=self._dict['areas'],
+            area_ids=self._dict['areas'],
             polygons=self._dict['simple_polygons'],
         )
 
@@ -201,9 +201,9 @@ class BroadcastMessage(JSONModel):
 
         return round_to_significant_figures(count, 1)
 
-    def get_areas(self, areas):
+    def get_areas(self, area_ids):
         return broadcast_area_libraries.get_areas(
-            areas
+            area_ids
         )
 
     def get_simple_polygons(self, areas):
@@ -216,20 +216,17 @@ class BroadcastMessage(JSONModel):
         # combined shapes to keep the point count down
         return polygons.smooth.simplify if len(areas) > 1 else polygons
 
-    def add_areas(self, *new_areas):
-        areas = list(OrderedSet(
-            self._dict['areas'] + list(new_areas)
+    def add_areas(self, *new_area_ids):
+        area_ids = list(OrderedSet(
+            self._dict['areas'] + list(new_area_ids)
         ))
-        simple_polygons = self.get_simple_polygons(areas=self.get_areas(areas=areas))
-        self._update(areas=areas, simple_polygons=simple_polygons.as_coordinate_pairs_lat_long)
+        simple_polygons = self.get_simple_polygons(areas=self.get_areas(area_ids))
+        self._update(areas=area_ids, simple_polygons=simple_polygons.as_coordinate_pairs_lat_long)
 
-    def remove_area(self, area_to_remove):
-        areas = [
-            area for area in self._dict['areas']
-            if area != area_to_remove
-        ]
-        simple_polygons = self.get_simple_polygons(areas=self.get_areas(areas=areas))
-        self._update(areas=areas, simple_polygons=simple_polygons.as_coordinate_pairs_lat_long)
+    def remove_area(self, area_id):
+        area_ids = list(set(self._dict['areas']) - {area_id})
+        simple_polygons = self.get_simple_polygons(areas=self.get_areas(area_ids))
+        self._update(areas=area_ids, simple_polygons=simple_polygons.as_coordinate_pairs_lat_long)
 
     def _set_status_to(self, status):
         broadcast_message_api_client.update_broadcast_message_status(

tests/__init__.py

@@ -678,7 +678,7 @@ def broadcast_message_json(
     updated_at=None,
     approved_by_id=None,
     cancelled_by_id=None,
-    areas=None,
+    area_ids=None,
     simple_polygons=None,
     content=None,
     reference=None,
@@ -696,7 +696,7 @@ def broadcast_message_json(
         'reference': reference,
 
         'personalisation': {},
-        'areas': areas or [
+        'areas': area_ids or [
             'ctry19-E92000001', 'ctry19-S92000003',
         ],
         'simple_polygons': simple_polygons or [],

tests/app/main/views/test_broadcast.py

@@ -904,7 +904,7 @@ def test_preview_broadcast_areas_page(
             created_by_id=fake_uuid,
             service_id=SERVICE_ONE_ID,
             status='draft',
-            areas=areas_selected,
+            area_ids=areas_selected,
         ),
     )
     client_request.login(active_user_create_broadcasts_permission)
@@ -974,7 +974,7 @@ def test_preview_broadcast_areas_page_with_custom_polygons(
             created_by_id=fake_uuid,
             service_id=SERVICE_ONE_ID,
             status='draft',
-            areas=['Area one', 'Area two', 'Area three'],
+            area_ids=['Area one', 'Area two', 'Area three'],
             simple_polygons=polygons,
         ),
     )
@@ -1000,7 +1000,7 @@ def test_preview_broadcast_areas_page_with_custom_polygons(
     ] == expected_list_items
 
 
-@pytest.mark.parametrize('areas, expected_list', (
+@pytest.mark.parametrize('area_ids, expected_list', (
     ([], [
         'Countries',
         'Demo areas',
@@ -1053,7 +1053,7 @@ def test_choose_broadcast_library_page(
     service_one,
     fake_uuid,
     active_user_create_broadcasts_permission,
-    areas,
+    area_ids,
     expected_list,
 ):
     service_one['permissions'] += ['broadcast']
@@ -1065,7 +1065,7 @@ def test_choose_broadcast_library_page(
             created_by_id=fake_uuid,
             service_id=SERVICE_ONE_ID,
             status='draft',
-            areas=areas,
+            area_ids=area_ids,
         ),
     )
     client_request.login(active_user_create_broadcasts_permission)
@@ -1108,7 +1108,7 @@ def test_suggested_area_has_correct_link(
             created_by_id=fake_uuid,
             service_id=SERVICE_ONE_ID,
             status='draft',
-            areas=[
+            area_ids=[
                 'wd20-E05004299',  # Pitville, a ward of Cheltenham
             ],
         ),

tests/app/models/test_broadcast_message.py

@@ -11,7 +11,7 @@ def test_simple_polygons(fake_uuid):
         template_id=fake_uuid,
         status='draft',
         created_by_id=fake_uuid,
-        areas=[
+        area_ids=[
             # Hackney Central
             'wd20-E05009372',
             # Hackney Wick
@@ -56,7 +56,7 @@ def test_raises_for_missing_areas(fake_uuid):
         template_id=fake_uuid,
         status='draft',
         created_by_id=fake_uuid,
-        areas=[
+        area_ids=[
             'wd20-E05009372',
             'something else',
         ],