implement item durability

[thiago-buarqque]

Description

• What was changed?

  • It is possible now to increment the damage of a given item after use_item, use_item_on, on_attack and normal_use events or whatever other event that an item might handle.
  • We're now saving and reading item's damage for a given player.

• Why were these changes necessary?
  It is part of the vanilla game.

• What is the impact of this change?
  This is the first step to read and write item components (data) when saving/reading a player's data in a world. Also this change introduces a way of sending structured components for a given Slot.

• Are there any known issues or limitations?
  This PR does not account for the unbreakable enchantment since it's not yet implemented.

Demo

Turn sound on 🔊 to hear the breaking sound :D

item-durability-demo-2025-04-06_16.39.08.1.mp4

[Snowiiii]

is this vanilla ?

[Snowiiii]

is this vanilla?

[Snowiiii]

I also wonder if the slot components are properly saved, so if you rejoin or the server restarts its saved in the player data

[Snowiiii]

i also think instead of using duplicated logic for all the tools you can just use a trait like Mojang does (abstract class)

[thiago-buarqque]

@Snowiiii

I also wonder if the slot components are properly saved, so if you rejoin or the server restarts its saved in the player data
Yes, it is. It's mentioned in the description

We're now saving and reading item's damage for a given player.

Not very clearly thought, my bad.

[thiago-buarqque]

i also think instead of using duplicated logic for all the tools you can just use a trait like Mojang does (abstract class)
I don't have access to Mojang code, how can I get access to it?

I did not create a trait for that because not all items is damaged after the same events. For instance.

All tools are damaged after breaking a block or using it in a block (if it's possible). Also if you hit an entity.

Swords break when hitting an entity.

Fishing rod does not break when you hit someone or break a block, but does when you fish.

Elytra breaks when in the chest slot and flying

others...

[thiago-buarqque]

@Snowiiii I like the explicit way of saying "hey, after this event happen (normal use, use on block etc) damage the item

[Snowiiii]

i don't like the on_after_dig function i wonder why i can't be just done in the on_use_block thing function, i also don't like that check if the player in creative yourself all the time, you can just put it into the calc function like vanilla does

 private int calculateDamage(int baseDamage, ServerWorld world, @Nullable ServerPlayerEntity player) {
        if (!this.isDamageable()) {
            return 0;
        }
        if (player != null && player.isInCreativeMode()) {
            return 0;
        }
        if (baseDamage > 0) {
            return EnchantmentHelper.getItemDamage(world, this, baseDamage);
        }
        return baseDamage;
    }

Other tools like Shovels or Swords are missing