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Fix pocket upgrades not applying after crafting

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The most annoying thing about pocket computers is handling computer
state (label, upgrades, etc...). Unlike other computers, which are tied
to a specific block entity, pocket computers float untethered. We can't
hold a reference to a specific item stack (as the computer might be
moved between inventories, crafted, etc...), so instead we explicitly
sync data between the computer and *current* stack, whenever the holding
player/entity is ticked.

In ed0b156e05ff64784f2f80346c82ab5142d954dc I rewrote this syncing code
to always treat the computer as the source of truth. Upgrades would be
copied to the computer, but never the other way round. However, this
meant that upgrades obtained by crafting would never be detected,
requiring the computer to be destroyed and recreated.

A more long-term fix here is probably to rewrite IPocketAccess to only
allow updating upgrade data on the main thread, and when we have a valid
PocketHolder. This is a breaking API change though, and so will have to
wait for 1.21.3.

For now, we just add a hook that refreshes the upgrade after crafting.

Fixes #1957
This commit is contained in:
Jonathan Coates 2024-10-27 09:43:47 +00:00
parent c271ed7c7f
commit dcc74e15c7
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GPG Key ID: B9E431FF07C98D06
2 changed files with 19 additions and 1 deletions
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5
projects/common/src/main/java/dan200/computercraft/shared/pocket/core/PocketBrain.java
View File

@ -24,6 +24,7 @@ import net.minecraft.world.phys.Vec3;
import javax.annotation.Nullable;
import java.util.Collections;
import java.util.Map;
import java.util.Objects;
/**
* Holds additional state for a pocket computer. This includes pocket computer upgrade,
@ -177,7 +178,9 @@ public final class PocketBrain implements IPocketAccess {
*/
@Override
public void setUpgrade(@Nullable UpgradeData<IPocketUpgrade> upgrade) {
this.upgrade = upgrade;
if (Objects.equals(this.upgrade, upgrade)) return;
this.upgrade = UpgradeData.copyOf(upgrade);
dirty = true;
invalidatePeripheral();
}

15
projects/common/src/main/java/dan200/computercraft/shared/pocket/items/PocketComputerItem.java
View File

@ -267,6 +267,21 @@ public class PocketComputerItem extends Item implements IComputerItem, IMedia, I
return getServerComputer(ServerContext.get(server).registry(), stack);
}
@Override
public void onCraftedBy(ItemStack stack, Level level, Player player) {
var tag = stack.getTag();
if (tag == null) return;
// Normally we treat the computer instance as the source of truth, and copy the computer's state back to the
// item. However, if we've just crafted the computer with an upgrade, we should sync the other way, and update
// the computer.
var server = level.getServer();
if (server != null) {
var computer = getServerComputer(server, stack);
if (computer != null) computer.getBrain().setUpgrade(getUpgradeWithData(stack));
}
}
// IComputerItem implementation
private static void setComputerID(ItemStack stack, int computerID) {