UserView: Add acceptsChatMessages field

lib/pleroma/web/activity_pub/views/user_view.ex

@@ -81,6 +81,15 @@ def render("user.json", %{user: user}) do
 
     fields = Enum.map(user.fields, &Map.put(&1, "type", "PropertyValue"))
 
+    chat_message_acceptance =
+      if is_boolean(user.accepts_chat_messages) do
+        %{
+          "acceptsChatMessages" => user.accepts_chat_messages
+        }
+      else
+        %{}
+      end
+
     %{
       "id" => user.ap_id,
       "type" => user.actor_type,
@@ -103,6 +112,7 @@ def render("user.json", %{user: user}) do
       "tag" => emoji_tags,
       "discoverable" => user.discoverable
     }
+    |> Map.merge(chat_message_acceptance)
     |> Map.merge(maybe_make_image(&User.avatar_url/2, "icon", user))
     |> Map.merge(maybe_make_image(&User.banner_url/2, "image", user))
     |> Map.merge(Utils.make_json_ld_header())

test/web/activity_pub/views/user_view_test.exs

@@ -158,4 +158,16 @@ test "sets correct totalItems when follows are hidden but the follow counter is
       assert %{"totalItems" => 1} = UserView.render("following.json", %{user: user})
     end
   end
+
+  describe "acceptsChatMessages" do
+    test "it returns this value if it is set" do
+      true_user = insert(:user, accepts_chat_messages: true)
+      false_user = insert(:user, accepts_chat_messages: false)
+      nil_user = insert(:user, accepts_chat_messages: nil)
+
+      assert %{"acceptsChatMessages" => true} = UserView.render("user.json", user: true_user)
+      assert %{"acceptsChatMessages" => false} = UserView.render("user.json", user: false_user)
+      refute Map.has_key?(UserView.render("user.json", user: nil_user), "acceptsChatMessages")
+    end
+  end
 end