Introduce UMAP_HOME_FEED to control which maps are shown on the home page

For now we have only three modes:
- latest, which is the default and shows the last updated maps
- highlighted, which shows only the map that have been starred by a least
  one staff member
- None, which does not show any map

docs/config/settings.md

@@ -218,6 +218,13 @@ ready for production use (no backup, etc.)
 
 Link to show on the header under the "Feedback and help" label.
 
+#### UMAP_HOME_FEED
+
+Which feed to display on the home page. Three valid values:
+- `"latest"`, which shows the latest maps (default)
+- `"highlighted"`, which shows the maps that have been starred by a staff member
+- `None`, which does not show any map on the home page
+
 #### UMAP_MAPS_PER_PAGE
 
 How many maps to show in maps list, like search or home page.

umap/settings/base.py

@@ -249,6 +249,7 @@ DATABASES = {"default": env.db(default="postgis://localhost:5432/umap")}
 UMAP_DEFAULT_SHARE_STATUS = None
 UMAP_DEFAULT_EDIT_STATUS = None
 UMAP_DEFAULT_FEATURES_HAVE_OWNERS = False
+UMAP_HOME_FEED = "latest"
 
 UMAP_READONLY = env("UMAP_READONLY", default=False)
 UMAP_GZIP = True

umap/templates/umap/home.html

@@ -10,7 +10,9 @@
     </div>
   {% endif %}
   <div class="wrapper">
+    {% if maps %}
       <h2 class="section">{% blocktrans %}Get inspired, browse maps{% endblocktrans %}</h2>
       <div class="map_list row">{% include "umap/map_list.html" %}</div>
+    {% endif %}
   </div>
 {% endblock maincontent %}

umap/tests/test_views.py

@@ -10,6 +10,7 @@ from django.urls import reverse
 from django.utils.timezone import make_aware
 
 from umap import VERSION
+from umap.models import Map, Star
 from umap.views import validate_url
 
 from .base import MapFactory, UserFactory
@@ -391,3 +392,51 @@ def test_webmanifest(client):
             },
         ]
     }
+
+
+@pytest.mark.django_db
+def test_home_feed(client, settings, user, tilelayer):
+    settings.UMAP_HOME_FEED = "latest"
+    staff = UserFactory(username="Staff", is_staff=True)
+    starred = MapFactory(
+        owner=user, name="A public map starred by staff", share_status=Map.PUBLIC
+    )
+    MapFactory(
+        owner=user, name="A public map not starred by staff", share_status=Map.PUBLIC
+    )
+    non_staff = MapFactory(
+        owner=user, name="A public map starred by non staff", share_status=Map.PUBLIC
+    )
+    private = MapFactory(
+        owner=user, name="A private map starred by staff", share_status=Map.PRIVATE
+    )
+    reserved = MapFactory(
+        owner=user, name="A reserved map starred by staff", share_status=Map.OPEN
+    )
+    Star.objects.create(by=staff, map=starred)
+    Star.objects.create(by=staff, map=private)
+    Star.objects.create(by=staff, map=reserved)
+    Star.objects.create(by=user, map=non_staff)
+    response = client.get(reverse("home"))
+    content = response.content.decode()
+    assert "A public map starred by staff" in content
+    assert "A public map not starred by staff" in content
+    assert "A public map starred by non staff" in content
+    assert "A private map starred by staff" not in content
+    assert "A reserved map starred by staff" not in content
+    settings.UMAP_HOME_FEED = "highlighted"
+    response = client.get(reverse("home"))
+    content = response.content.decode()
+    assert "A public map starred by staff" in content
+    assert "A public map not starred by staff" not in content
+    assert "A public map starred by non staff" not in content
+    assert "A private map starred by staff" not in content
+    assert "A reserved map starred by staff" not in content
+    settings.UMAP_HOME_FEED = None
+    response = client.get(reverse("home"))
+    content = response.content.decode()
+    assert "A public map starred by staff" not in content
+    assert "A public map not starred by staff" not in content
+    assert "A public map starred by non staff" not in content
+    assert "A private map starred by staff" not in content
+    assert "A reserved map starred by staff" not in content

umap/views.py

@@ -119,13 +119,26 @@ class PublicMapsMixin(object):
         maps = qs.order_by("-modified_at")
         return maps
 
+    def get_highlighted_maps(self):
+        staff = User.objects.filter(is_staff=True)
+        stars = Star.objects.filter(by__in=staff).values("map")
+        qs = Map.public.filter(pk__in=stars)
+        maps = qs.order_by("-modified_at")
+        return maps
+
 
 class Home(PaginatorMixin, TemplateView, PublicMapsMixin):
     template_name = "umap/home.html"
     list_template_name = "umap/map_list.html"
 
     def get_context_data(self, **kwargs):
+        if settings.UMAP_HOME_FEED is None:
+            maps = []
+        elif settings.UMAP_HOME_FEED == "highlighted":
+            maps = self.get_highlighted_maps()
+        else:
             maps = self.get_public_maps()
+        maps = self.paginate(maps, settings.UMAP_MAPS_PER_PAGE)
 
         demo_map = None
         if hasattr(settings, "UMAP_DEMO_PK"):
@@ -141,8 +154,6 @@ class Home(PaginatorMixin, TemplateView, PublicMapsMixin):
             except Map.DoesNotExist:
                 pass
 
-        maps = self.paginate(maps, settings.UMAP_MAPS_PER_PAGE)
-
         return {
             "maps": maps,
             "demo_map": demo_map,