Function BuildCargoAcceptanceString

src/cargotype.cpp:267–293

* Build comma-separated cargo acceptance string. * @param acceptance CargoArray filled with accepted cargo. * @param label Label to prefix cargo acceptance list. * @return String of accepted cargo, or nullopt if no cargo is accepted. */

 * @return String of accepted cargo, or nullopt if no cargo is accepted.
 */
std::optional<std::string> BuildCargoAcceptanceString(const CargoArray &acceptance, StringID label)
{
	std::string_view list_separator = GetListSeparator();

	std::stringstream line;

	bool found = false;
	for (const CargoSpec *cs : _sorted_cargo_specs) {
		CargoType cargo_type = cs->Index();
		if (acceptance[cargo_type] > 0) {
			/* Add a comma between each item. */
			if (found) line << list_separator;
			found = true;

			/* If the accepted value is less than 8, show it in 1/8:ths */
			if (acceptance[cargo_type] < 8) {
				line << GetString(STR_LAND_AREA_INFORMATION_CARGO_EIGHTS, acceptance[cargo_type], cs->name);
			} else {
				line << GetString(cs->name);
			}
		}
	}

	if (found) return GetString(label, line.str());

	return std::nullopt;
}