Method AfterLoad

src/saveload/cargopacket_sl.cpp:23–118

* Savegame conversion for cargopackets. */ static */

 * Savegame conversion for cargopackets.
 */
/* static */ void CargoPacket::AfterLoad()
{
	if (IsSavegameVersionBefore(SLV_44)) {
		/* If we remove a station while cargo from it is still en route, payment calculation will assume
		 * 0, 0 to be the source of the cargo, resulting in very high payments usually. v->source_xy
		 * stores the coordinates, preserving them even if the station is removed. However, if a game is loaded
		 * where this situation exists, the cargo-source information is lost. in this case, we set the source
		 * to the current tile of the vehicle to prevent excessive profits
		 */
		for (const Vehicle *v : Vehicle::Iterate()) {
			const CargoPacketList *packets = v->cargo.Packets();
			for (VehicleCargoList::ConstIterator it(packets->begin()); it != packets->end(); it++) {
				CargoPacket *cp = *it;
				cp->source_xy = Station::IsValidID(cp->first_station) ? Station::Get(cp->first_station)->xy : v->tile;
			}
		}

		/* Store position of the station where the goods come from, so there
		 * are no very high payments when stations get removed. However, if the
		 * station where the goods came from is already removed, the source
		 * information is lost. In that case we set it to the position of this
		 * station */
		for (Station *st : Station::Iterate()) {
			for (GoodsEntry &ge : st->goods) {
				if (!ge.HasData()) continue;
				const StationCargoPacketMap *packets = ge.GetData().cargo.Packets();
				for (StationCargoList::ConstIterator it(packets->begin()); it != packets->end(); it++) {
					CargoPacket *cp = *it;
					cp->source_xy = Station::IsValidID(cp->first_station) ? Station::Get(cp->first_station)->xy : st->xy;
				}
			}
		}
	}

	if (IsSavegameVersionBefore(SLV_120)) {
		/* CargoPacket's source should be either StationID::Invalid() or a valid station */
		for (CargoPacket *cp : CargoPacket::Iterate()) {
			if (!Station::IsValidID(cp->first_station)) cp->first_station = StationID::Invalid();
		}
	}

	if (!IsSavegameVersionBefore(SLV_68)) {
		/* Only since version 68 we have cargo packets. Savegames from before used
		 * 'new CargoPacket' + cargolist.Append so their caches are already
		 * correct and do not need rebuilding. */
		for (Vehicle *v : Vehicle::Iterate()) v->cargo.InvalidateCache();

		for (Station *st : Station::Iterate()) {
			for (GoodsEntry &ge : st->goods) {
				if (!ge.HasData()) continue;
				ge.GetData().cargo.InvalidateCache();
			}
		}
	}

	if (IsSavegameVersionBefore(SLV_181)) {
		for (Vehicle *v : Vehicle::Iterate()) v->cargo.KeepAll();
	}