Code/net/minecraft/network/chat/PlayerChatMessage.java

package net.minecraft.network.chat;

import com.google.common.primitives.Ints;
import com.mojang.serialization.MapCodec;
import com.mojang.serialization.codecs.RecordCodecBuilder;
import com.mojang.serialization.codecs.RecordCodecBuilder.Instance;
import java.security.SignatureException;
import java.time.Duration;
import java.time.Instant;
import java.util.Objects;
import java.util.Optional;
import java.util.UUID;
import java.util.stream.Collectors;
import javax.annotation.Nullable;
import net.minecraft.Util;
import net.minecraft.util.SignatureUpdater;
import net.minecraft.util.SignatureValidator;

public record PlayerChatMessage(
    SignedMessageLink link, @Nullable MessageSignature signature, SignedMessageBody signedBody, @Nullable Component unsignedContent, FilterMask filterMask
) {
    public static final MapCodec<PlayerChatMessage> MAP_CODEC = RecordCodecBuilder.mapCodec(
        p_308567_ -> p_308567_.group(
                SignedMessageLink.CODEC.fieldOf("link").forGetter(PlayerChatMessage::link),
                MessageSignature.CODEC.optionalFieldOf("signature").forGetter(p_253459_ -> Optional.ofNullable(p_253459_.signature)),
                SignedMessageBody.MAP_CODEC.forGetter(PlayerChatMessage::signedBody),
                ComponentSerialization.CODEC.optionalFieldOf("unsigned_content").forGetter(p_253458_ -> Optional.ofNullable(p_253458_.unsignedContent)),
                FilterMask.CODEC.optionalFieldOf("filter_mask", FilterMask.PASS_THROUGH).forGetter(PlayerChatMessage::filterMask)
            )
            .apply(
                p_308567_,
                (p_253461_, p_253462_, p_253463_, p_253464_, p_253465_) -> new PlayerChatMessage(
                    p_253461_, p_253462_.orElse(null), p_253463_, p_253464_.orElse(null), p_253465_
                )
            )
    );
    private static final UUID SYSTEM_SENDER = Util.NIL_UUID;
    public static final Duration MESSAGE_EXPIRES_AFTER_SERVER = Duration.ofMinutes(5L);
    public static final Duration MESSAGE_EXPIRES_AFTER_CLIENT = MESSAGE_EXPIRES_AFTER_SERVER.plus(Duration.ofMinutes(2L));

    public static PlayerChatMessage system(String p_249209_) {
        return unsigned(SYSTEM_SENDER, p_249209_);
    }

    public static PlayerChatMessage unsigned(UUID p_251783_, String p_251615_) {
        SignedMessageBody signedmessagebody = SignedMessageBody.unsigned(p_251615_);
        SignedMessageLink signedmessagelink = SignedMessageLink.unsigned(p_251783_);
        return new PlayerChatMessage(signedmessagelink, null, signedmessagebody, null, FilterMask.PASS_THROUGH);
    }

    public PlayerChatMessage withUnsignedContent(Component p_242164_) {
        Component component = !p_242164_.equals(Component.literal(this.signedContent())) ? p_242164_ : null;
        return new PlayerChatMessage(this.link, this.signature, this.signedBody, component, this.filterMask);
    }

    public PlayerChatMessage removeUnsignedContent() {
        return this.unsignedContent != null ? new PlayerChatMessage(this.link, this.signature, this.signedBody, null, this.filterMask) : this;
    }

    public PlayerChatMessage filter(FilterMask p_243320_) {
        return this.filterMask.equals(p_243320_) ? this : new PlayerChatMessage(this.link, this.signature, this.signedBody, this.unsignedContent, p_243320_);
    }

    public PlayerChatMessage filter(boolean p_243223_) {
        return this.filter(p_243223_ ? this.filterMask : FilterMask.PASS_THROUGH);
    }

    public PlayerChatMessage removeSignature() {
        SignedMessageBody signedmessagebody = SignedMessageBody.unsigned(this.signedContent());
        SignedMessageLink signedmessagelink = SignedMessageLink.unsigned(this.sender());
        return new PlayerChatMessage(signedmessagelink, null, signedmessagebody, this.unsignedContent, this.filterMask);
    }

    public static void updateSignature(SignatureUpdater.Output p_250661_, SignedMessageLink p_248621_, SignedMessageBody p_248823_) throws SignatureException {
        p_250661_.update(Ints.toByteArray(1));
        p_248621_.updateSignature(p_250661_);
        p_248823_.updateSignature(p_250661_);
    }

    public boolean verify(SignatureValidator p_241442_) {
        return this.signature != null && this.signature.verify(p_241442_, p_249861_ -> updateSignature(p_249861_, this.link, this.signedBody));
    }

    public String signedContent() {
        return this.signedBody.content();
    }

    public Component decoratedContent() {
        return Objects.requireNonNullElseGet(this.unsignedContent, () -> Component.literal(this.signedContent()));
    }

    public Instant timeStamp() {
        return this.signedBody.timeStamp();
    }

    public long salt() {
        return this.signedBody.salt();
    }

    public boolean hasExpiredServer(Instant p_240573_) {
        return p_240573_.isAfter(this.timeStamp().plus(MESSAGE_EXPIRES_AFTER_SERVER));
    }

    public boolean hasExpiredClient(Instant p_240629_) {
        return p_240629_.isAfter(this.timeStamp().plus(MESSAGE_EXPIRES_AFTER_CLIENT));
    }

    public UUID sender() {
        return this.link.sender();
    }

    public boolean isSystem() {
        return this.sender().equals(SYSTEM_SENDER);
    }

    public boolean hasSignature() {
        return this.signature != null;
    }

    public boolean hasSignatureFrom(UUID p_243236_) {
        return this.hasSignature() && this.link.sender().equals(p_243236_);
    }

    public boolean isFullyFiltered() {
        return this.filterMask.isFullyFiltered();
    }

    public static String describeSigned(PlayerChatMessage p_397091_) {
        return "'"
            + p_397091_.signedBody.content()
            + "' @ "
            + p_397091_.signedBody.timeStamp()
            + "\n - From: "
            + p_397091_.link.sender()
            + "/"
            + p_397091_.link.sessionId()
            + ", message #"
            + p_397091_.link.index()
            + "\n - Salt: "
            + p_397091_.signedBody.salt()
            + "\n - Signature: "
            + MessageSignature.describe(p_397091_.signature)
            + "\n - Last Seen: [\n"
            + p_397091_.signedBody
                .lastSeen()
                .entries()
                .stream()
                .map(p_389918_ -> "     " + MessageSignature.describe(p_389918_) + "\n")
                .collect(Collectors.joining())
            + " ]\n";
    }
}