+
+ def validate_object_or_user_presence(cng, options \\ []) do
+ field_name = Keyword.get(options, :field_name, :object)
+ options = Keyword.put(options, :field_name, field_name)
+
+ actor_cng =
+ cng
+ |> validate_actor_presence(options)
+
+ object_cng =
+ cng
+ |> validate_object_presence(options)
+
+ if actor_cng.valid?, do: actor_cng, else: object_cng
+ end
+
+ def validate_host_match(cng, fields \\ [:id, :actor]) do
+ unique_hosts =
+ fields
+ |> Enum.map(fn field ->
+ %URI{host: host} =
+ cng
+ |> get_field(field)
+ |> URI.parse()
+
+ host
+ end)
+ |> Enum.uniq()
+ |> Enum.count()
+
+ if unique_hosts == 1 do
+ cng
+ else
+ fields
+ |> Enum.reduce(cng, fn field, cng ->
+ cng
+ |> add_error(field, "hosts of #{inspect(fields)} aren't matching")
+ end)
+ end
+ end
+
+ def validate_fields_match(cng, fields) do
+ unique_fields =
+ fields
+ |> Enum.map(fn field -> get_field(cng, field) end)
+ |> Enum.uniq()
+ |> Enum.count()
+
+ if unique_fields == 1 do
+ cng
+ else
+ fields
+ |> Enum.reduce(cng, fn field, cng ->
+ cng
+ |> add_error(field, "Fields #{inspect(fields)} aren't matching")
+ end)
+ end
+ end