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package org.spongepowered.common.mixin.exploit.item;

import net.minecraft.item.WritableBookItem;
import net.minecraft.nbt.CompoundNBT;
import net.minecraft.nbt.ListNBT;
import org.spongepowered.asm.mixin.Mixin;
import org.spongepowered.asm.mixin.injection.At;
import org.spongepowered.asm.mixin.injection.Constant;
import org.spongepowered.asm.mixin.injection.Inject;
import org.spongepowered.asm.mixin.injection.ModifyConstant;
import org.spongepowered.asm.mixin.injection.Redirect;
import org.spongepowered.asm.mixin.injection.callback.CallbackInfoReturnable;
import org.spongepowered.asm.mixin.injection.callback.LocalCapture;
import org.spongepowered.common.applaunch.config.core.SpongeConfigs;

import java.nio.charset.StandardCharsets;
import java.util.stream.IntStream;

@Mixin(WritableBookItem.class)
public abstract class WritableBookItem_LimitBookSize {

    @Redirect(
            method = "makeSureTagIsValid",
            at = @At(value = "INVOKE", target = "Ljava/lang/String;length()I")
    )
    private static int impl$useByteLength(final String s) {
        return s.getBytes(StandardCharsets.UTF_8).length;
    }

    @ModifyConstant(
            method = "makeSureTagIsValid",
            constant = @Constant(intValue = 32767)
    )
    private static int impl$useMaxBookPageSizeFromConfig(final int maxBookPageSize) {
        return SpongeConfigs.getCommon().get().exploits.maxBookPageSize;
    }

    @Inject(
            method = "makeSureTagIsValid",
            cancellable = true,
            at = @At(value = "RETURN", ordinal = 3),
            locals = LocalCapture.CAPTURE_FAILHARD
    )
    private static void impl$useMaxBookSizeFromConfig(final CompoundNBT p_150930_0_, final CallbackInfoReturnable<Boolean> cir, final ListNBT listnbt) {
        if (cir.getReturnValue()) {
            final int size = IntStream.range(0, listnbt.size()).mapToObj(listnbt::getString).mapToInt(s -> s.getBytes(StandardCharsets.UTF_8).length).sum();
            if (size > SpongeConfigs.getCommon().get().exploits.maxBookSize) {
                cir.setReturnValue(false);
            }
        }
    }

}

@@ -2791,74 +2791,9 @@
 URN%22
-, ordinal = 3),%0A            locals = LocalCapture.CAPTURE_FAILHARD
+)
 %0A   
@@ -2925,31 +2925,8 @@
  cir
-, final ListNBT listnbt
 ) %7B%0A
@@ -2957,24 +2957,93 @@
 nValue()) %7B%0A
+            final ListNBT listnbt = p_150930_0_.getList(%22pages%22, 8);%0A
             

Fix InjectionError in book exploit mixin