expose bubble instances via nodeinfo (#136)

Reviewed-on: https://akkoma.dev/AkkomaGang/akkoma/pulls/136

lib/pleroma/web/nodeinfo/nodeinfo.ex

@@ -70,7 +70,8 @@ def get_nodeinfo("2.0") do
         features: features,
         restrictedNicknames: Config.get([Pleroma.User, :restricted_nicknames]),
         skipThreadContainment: Config.get([:instance, :skip_thread_containment], false),
-        privilegedStaff: Config.get([:instance, :privileged_staff])
+        privilegedStaff: Config.get([:instance, :privileged_staff]),
+        localBubbleInstances: Config.get([:instance, :local_bubble], [])
       }
     }
   end

lib/pleroma/web/nodeinfo/nodeinfo_controller.ex

@@ -88,7 +88,8 @@ def raw_nodeinfo do
         mailerEnabled: Config.get([Pleroma.Emails.Mailer, :enabled], false),
         features: features,
         restrictedNicknames: Config.get([Pleroma.User, :restricted_nicknames]),
-        skipThreadContainment: Config.get([:instance, :skip_thread_containment], false)
+        skipThreadContainment: Config.get([:instance, :skip_thread_containment], false),
+        localBubbleInstances: Config.get([:instance, :local_bubble], [])
       }
     }
   end

test/pleroma/web/node_info_test.exs

@@ -188,6 +188,25 @@ test "shows extra information in the quarantined_info field for relevant entries
     end
   end
 
+  test "Bubble instances", %{conn: conn} do
+    clear_config([:instance, :local_bubble], [])
+
+    response =
+      conn
+      |> get("/nodeinfo/2.1.json")
+      |> json_response(:ok)
+
+    assert response["metadata"]["localBubbleInstances"] == []
+    clear_config([:instance, :local_bubble], ["example.com"])
+
+    response =
+      conn
+      |> get("/nodeinfo/2.1.json")
+      |> json_response(:ok)
+
+    assert response["metadata"]["localBubbleInstances"] == ["example.com"]
+  end
+
   describe "MRF SimplePolicy" do
     setup do
       clear_config([:mrf, :policies], [Pleroma.Web.ActivityPub.MRF.SimplePolicy])