Add :reject_deletes option to SimplePolicy

test/web/activity_pub/mrf/simple_policy_test.exs

@@ -17,7 +17,8 @@ defmodule Pleroma.Web.ActivityPub.MRF.SimplePolicyTest do
             reject: [],
             accept: [],
             avatar_removal: [],
-            banner_removal: []
+            banner_removal: [],
+            reject_deletes: []
           )
 
   describe "when :media_removal" do
@@ -258,14 +259,6 @@ defmodule Pleroma.Web.ActivityPub.MRF.SimplePolicyTest do
 
       assert SimplePolicy.filter(remote_user) == {:reject, nil}
     end
-
-    test "always accept deletions" do
-      Config.put([:mrf_simple, :reject], ["remote.instance"])
-
-      deletion_message = build_remote_deletion_message()
-
-      assert SimplePolicy.filter(deletion_message) == {:ok, deletion_message}
-    end
   end
 
   describe "when :accept" do
@@ -316,14 +309,6 @@ defmodule Pleroma.Web.ActivityPub.MRF.SimplePolicyTest do
 
       assert SimplePolicy.filter(remote_user) == {:ok, remote_user}
     end
-
-    test "always accept deletions" do
-      Config.put([:mrf_simple, :accept], ["non.matching.remote"])
-
-      deletion_message = build_remote_deletion_message()
-
-      assert SimplePolicy.filter(deletion_message) == {:ok, deletion_message}
-    end
   end
 
   describe "when :avatar_removal" do
@@ -398,6 +383,66 @@ defmodule Pleroma.Web.ActivityPub.MRF.SimplePolicyTest do
     end
   end
 
+  describe "when :reject_deletes is empty" do
+    setup do: Config.put([:mrf_simple, :reject_deletes], [])
+
+    test "it accepts deletions even from rejected servers" do
+      Config.put([:mrf_simple, :reject], ["remote.instance"])
+
+      deletion_message = build_remote_deletion_message()
+
+      assert SimplePolicy.filter(deletion_message) == {:ok, deletion_message}
+    end
+
+    test "it accepts deletions even from non-whitelisted servers" do
+      Config.put([:mrf_simple, :accept], ["non.matching.remote"])
+
+      deletion_message = build_remote_deletion_message()
+
+      assert SimplePolicy.filter(deletion_message) == {:ok, deletion_message}
+    end
+  end
+
+  describe "when :reject_deletes is not empty but it doesn't have a matching host" do
+    setup do: Config.put([:mrf_simple, :reject_deletes], ["non.matching.remote"])
+
+    test "it accepts deletions even from rejected servers" do
+      Config.put([:mrf_simple, :reject], ["remote.instance"])
+
+      deletion_message = build_remote_deletion_message()
+
+      assert SimplePolicy.filter(deletion_message) == {:ok, deletion_message}
+    end
+
+    test "it accepts deletions even from non-whitelisted servers" do
+      Config.put([:mrf_simple, :accept], ["non.matching.remote"])
+
+      deletion_message = build_remote_deletion_message()
+
+      assert SimplePolicy.filter(deletion_message) == {:ok, deletion_message}
+    end
+  end
+
+  describe "when :reject_deletes has a matching host" do
+    setup do: Config.put([:mrf_simple, :reject_deletes], ["remote.instance"])
+
+    test "it rejects the deletion" do
+      deletion_message = build_remote_deletion_message()
+
+      assert SimplePolicy.filter(deletion_message) == {:reject, nil}
+    end
+  end
+
+  describe "when :reject_deletes match with wildcard domain" do
+    setup do: Config.put([:mrf_simple, :reject_deletes], ["*.remote.instance"])
+
+    test "it rejects the deletion" do
+      deletion_message = build_remote_deletion_message()
+
+      assert SimplePolicy.filter(deletion_message) == {:reject, nil}
+    end
+  end
+
   defp build_local_message do
     %{
       "actor" => "#{Pleroma.Web.base_url()}/users/alice",