How to make item equippable?

[broken estuary]

if it's an existing item, mixin to LivingEntity$getPreferredEquipmentSlot, otherwise if adding a new one then have your item implement Equipment

[broken estuary]

don't understand the question, what are you asking?

if creating an equippable item, just make it so your class implements Equipment with public class yourClass implements Equipment {...}, if making an existing item equippable then the following is an example of a mixin that does so:

@Mixin(LivingEntity.class)
public class LivingEntityMixin {
    @Inject(method = "getPreferredEquipmentSlot", at = @At("HEAD"), cancellable = true)
    private static void moveToSlot(ItemStack stack, CallbackInfoReturnable<EquipmentSlot> cir) {
        if (<do your checks on the stack here>) cir.setReturnValue(<equipment slot to move to>);
    }
}

i don't know what exactly the problem is nor the exact mixin you're having a problem with

game version also makes a difference so you need to give me all of that information

are you using mojmap or yarn?

what version of the game are you modding for?

do you know what set of mappings you have?

adding this in a blank template mod, i can 100% verify that this works on 1.20.4 with the latest yarn mappings

oh also forgot to mention, you need to add an injector in Item$use, like so

@Mixin(Item.class)
public class ItemMixin {

    @Inject(method = "use", at = @At("HEAD"), cancellable = true)
    private void swapEquip(World world, PlayerEntity user, Hand hand, CallbackInfoReturnable<TypedActionResult<ItemStack>> cir) {
        if (<item check here>) {
            cir.setReturnValue(equipAndSwap(<your item type>, world, user, hand));
        }
    }

    @Unique private TypedActionResult<ItemStack> equipAndSwap(Item item, World world, PlayerEntity user, Hand hand) {
        ItemStack itemStack = user.getStackInHand(hand);
        EquipmentSlot equipmentSlot = MobEntity.getPreferredEquipmentSlot(itemStack);
        ItemStack itemStack2 = user.getEquippedStack(equipmentSlot);
        if (EnchantmentHelper.hasBindingCurse(itemStack2) || ItemStack.areEqual(itemStack, itemStack2)) {
            return TypedActionResult.fail(itemStack);
        }
        if (!world.isClient()) {
            user.incrementStat(Stats.USED.getOrCreateStat(item));
        }
        ItemStack itemStack3 = itemStack2.isEmpty() ? itemStack : itemStack2.copyAndEmpty();
        ItemStack itemStack4 = itemStack.copyAndEmpty();
        user.equipStack(equipmentSlot, itemStack4);
        return TypedActionResult.success(itemStack3, world.isClient());
    }

}

equipAndSwap is directly copied from the Equipment class

just push it to github if you can

alternatively go in your build.gradle and find the line that says mappings

oh alright

was it genSources?

oh alright, that would make sense

although from when i briefly looked at your repo it seems the items you were registering can just be registered as helmets to achieve the same deal

user.getStackInHand(hand).isOf(yourItem)

looking over it

have you added your mixins to the mixin configuration file?

you need this in your mod.mixins.json

  "mixins": [
    "ItemMixin",
    "LivingEntityMixin"
  ],