Function UpdateTownRating

src/town_cmd.cpp:3766–3795

* Monthly callback to update town and station ratings. * @param t The town to update. */

 * @param t The town to update.
 */
static void UpdateTownRating(Town *t)
{
	/* Increase company ratings if they're low */
	for (const Company *c : Company::Iterate()) {
		if (t->ratings[c->index] < RATING_GROWTH_MAXIMUM) {
			t->ratings[c->index] = std::min((int)RATING_GROWTH_MAXIMUM, t->ratings[c->index] + RATING_GROWTH_UP_STEP);
		}
	}

	ForAllStationsNearTown(t, [&](const Station *st) {
		if (st->time_since_load <= 20 || st->time_since_unload <= 20) {
			if (Company::IsValidID(st->owner)) {
				int new_rating = t->ratings[st->owner] + RATING_STATION_UP_STEP;
				t->ratings[st->owner] = std::min<int>(new_rating, INT16_MAX); // do not let it overflow
			}
		} else {
			if (Company::IsValidID(st->owner)) {
				int new_rating = t->ratings[st->owner] + RATING_STATION_DOWN_STEP;
				t->ratings[st->owner] = std::max(new_rating, INT16_MIN);
			}
		}
	});

	/* clamp all ratings to valid values */
	for (uint i = 0; i < MAX_COMPANIES; i++) {
		t->ratings[i] = Clamp(t->ratings[i], RATING_MINIMUM, RATING_MAXIMUM);
	}

	SetWindowDirty(WC_TOWN_AUTHORITY, t->index);
}


/**