Code/net/minecraft/client/renderer/block/model/multipart/KeyValueCondition.java

package net.minecraft.client.renderer.block.model.multipart;

import com.google.common.base.Joiner;
import com.google.common.base.Splitter;
import com.google.common.collect.Lists;
import com.mojang.datafixers.util.Either;
import com.mojang.logging.LogUtils;
import com.mojang.serialization.Codec;
import com.mojang.serialization.DataResult;
import java.util.ArrayList;
import java.util.List;
import java.util.Locale;
import java.util.Map;
import java.util.Optional;
import java.util.function.Predicate;
import net.minecraft.Util;
import net.minecraft.util.ExtraCodecs;
import net.minecraft.world.level.block.state.StateDefinition;
import net.minecraft.world.level.block.state.StateHolder;
import net.minecraft.world.level.block.state.properties.Property;
import net.minecraftforge.api.distmarker.Dist;
import net.minecraftforge.api.distmarker.OnlyIn;
import org.slf4j.Logger;

@OnlyIn(Dist.CLIENT)
public record KeyValueCondition(Map<String, KeyValueCondition.Terms> tests) implements Condition {
    static final Logger LOGGER = LogUtils.getLogger();
    public static final Codec<KeyValueCondition> CODEC = ExtraCodecs.nonEmptyMap(Codec.unboundedMap(Codec.STRING, KeyValueCondition.Terms.CODEC))
        .xmap(KeyValueCondition::new, KeyValueCondition::tests);

    @Override
    public <O, S extends StateHolder<O, S>> Predicate<S> instantiate(StateDefinition<O, S> p_393385_) {
        List<Predicate<S>> list = new ArrayList<>(this.tests.size());
        this.tests.forEach((p_389489_, p_389490_) -> list.add(instantiate(p_393385_, p_389489_, p_389490_)));
        return Util.allOf(list);
    }

    private static <O, S extends StateHolder<O, S>> Predicate<S> instantiate(StateDefinition<O, S> p_395136_, String p_394195_, KeyValueCondition.Terms p_392651_) {
        Property<?> property = p_395136_.getProperty(p_394195_);
        if (property == null) {
            throw new IllegalArgumentException(String.format(Locale.ROOT, "Unknown property '%s' on '%s'", p_394195_, p_395136_.getOwner()));
        } else {
            return p_392651_.instantiate(p_395136_.getOwner(), property);
        }
    }

    @OnlyIn(Dist.CLIENT)
    public record Term(String value, boolean negated) {
        private static final String NEGATE = "!";

        public Term(String value, boolean negated) {
            if (value.isEmpty()) {
                throw new IllegalArgumentException("Empty term");
            } else {
                this.value = value;
                this.negated = negated;
            }
        }

        public static KeyValueCondition.Term parse(String p_394130_) {
            return p_394130_.startsWith("!") ? new KeyValueCondition.Term(p_394130_.substring(1), true) : new KeyValueCondition.Term(p_394130_, false);
        }

        @Override
        public String toString() {
            return this.negated ? "!" + this.value : this.value;
        }
    }

    @OnlyIn(Dist.CLIENT)
    public record Terms(List<KeyValueCondition.Term> entries) {
        private static final char SEPARATOR = '|';
        private static final Joiner JOINER = Joiner.on('|');
        private static final Splitter SPLITTER = Splitter.on('|');
        private static final Codec<String> LEGACY_REPRESENTATION_CODEC = Codec.either(Codec.INT, Codec.BOOL)
            .flatComapMap(
                p_397440_ -> p_397440_.map(String::valueOf, String::valueOf), p_393483_ -> DataResult.error(() -> "This codec can't be used for encoding")
            );
        public static final Codec<KeyValueCondition.Terms> CODEC = Codec.withAlternative(Codec.STRING, LEGACY_REPRESENTATION_CODEC)
            .comapFlatMap(KeyValueCondition.Terms::parse, KeyValueCondition.Terms::toString);

        public Terms(List<KeyValueCondition.Term> entries) {
            if (entries.isEmpty()) {
                throw new IllegalArgumentException("Empty value for property");
            } else {
                this.entries = entries;
            }
        }

        public static DataResult<KeyValueCondition.Terms> parse(String p_396679_) {
            List<KeyValueCondition.Term> list = SPLITTER.splitToStream(p_396679_).map(KeyValueCondition.Term::parse).toList();
            if (list.isEmpty()) {
                return DataResult.error(() -> "Empty value for property");
            } else {
                for (KeyValueCondition.Term keyvaluecondition$term : list) {
                    if (keyvaluecondition$term.value.isEmpty()) {
                        return DataResult.error(() -> "Empty term in value '" + p_396679_ + "'");
                    }
                }

                return DataResult.success(new KeyValueCondition.Terms(list));
            }
        }

        @Override
        public String toString() {
            return JOINER.join(this.entries);
        }

        public <O, S extends StateHolder<O, S>, T extends Comparable<T>> Predicate<S> instantiate(O p_395310_, Property<T> p_397634_) {
            Predicate<T> predicate = Util.anyOf(Lists.transform(this.entries, p_396639_ -> this.instantiate(p_395310_, p_397634_, p_396639_)));
            List<T> list = new ArrayList<>(p_397634_.getPossibleValues());
            int i = list.size();
            list.removeIf(predicate.negate());
            int j = list.size();
            if (j == 0) {
                KeyValueCondition.LOGGER.warn("Condition {} for property {} on {} is always false", this, p_397634_.getName(), p_395310_);
                return p_397520_ -> false;
            } else {
                int k = i - j;
                if (k == 0) {
                    KeyValueCondition.LOGGER.warn("Condition {} for property {} on {} is always true", this, p_397634_.getName(), p_395310_);
                    return p_394455_ -> true;
                } else {
                    boolean flag;
                    List<T> list1;
                    if (j <= k) {
                        flag = false;
                        list1 = list;
                    } else {
                        flag = true;
                        List<T> list2 = new ArrayList<>(p_397634_.getPossibleValues());
                        list2.removeIf(predicate);
                        list1 = list2;
                    }

                    if (list1.size() == 1) {
                        T t = (T)list1.getFirst();
                        return p_393769_ -> {
                            T t1 = p_393769_.getValue(p_397634_);
                            return t.equals(t1) ^ flag;
                        };
                    } else {
                        return p_392728_ -> {
                            T t1 = p_392728_.getValue(p_397634_);
                            return list1.contains(t1) ^ flag;
                        };
                    }
                }
            }
        }

        private <T extends Comparable<T>> T getValueOrThrow(Object p_392474_, Property<T> p_394466_, String p_392342_) {
            Optional<T> optional = p_394466_.getValue(p_392342_);
            if (optional.isEmpty()) {
                throw new RuntimeException(
                    String.format(Locale.ROOT, "Unknown value '%s' for property '%s' on '%s' in '%s'", p_392342_, p_394466_, p_392474_, this)
                );
            } else {
                return optional.get();
            }
        }

        private <T extends Comparable<T>> Predicate<T> instantiate(Object p_397030_, Property<T> p_395665_, KeyValueCondition.Term p_393001_) {
            T t = this.getValueOrThrow(p_397030_, p_395665_, p_393001_.value);
            return p_393001_.negated ? p_396166_ -> !p_396166_.equals(t) : p_392745_ -> p_392745_.equals(t);
        }
    }
}