Simple util class to convert a Component using color codes to a legacy String

LegacyComponentSerializer.java

import net.minecraft.ChatFormatting;
import net.minecraft.network.chat.Component;
import net.minecraft.network.chat.Style;
import net.minecraft.util.FormattedCharSequence;
import net.minecraft.util.FormattedCharSink;

import java.util.EnumSet;

public class LegacyComponentSerializer {
    public static String convertToLegacy(Component component) {
        return convertToLegacy(component.getVisualOrderText());
    }

    public static String convertToLegacy(FormattedCharSequence charSequence) {
        StringBuilder builder = new StringBuilder();

        charSequence.accept(new FormattedCharSink() {
            private final EnumSet<ChatFormatting> formats = EnumSet.noneOf(ChatFormatting.class);
            private boolean first = true;
            private EnumSet<ChatFormatting> oldFormats = EnumSet.noneOf(ChatFormatting.class);

            @Override
            public boolean accept(int idx, Style style, int codePoint) {
                this.formats.clear();
                boolean reset = true;
                if (style.getColor() != null) {
                    String serialized = style.getColor().serialize();
                    if (serialized.charAt(0) != '#') // Named colors do not have a hex # identifier
                        this.formats.add(ChatFormatting.getByName(serialized));
                    reset = false; // Setting a color automatically resets
                }

                if (style.isBold())
                    this.formats.add(ChatFormatting.BOLD);
                if (style.isItalic())
                    this.formats.add(ChatFormatting.ITALIC);
                if (style.isUnderlined())
                    this.formats.add(ChatFormatting.UNDERLINE);
                if (style.isStrikethrough())
                    this.formats.add(ChatFormatting.STRIKETHROUGH);
                if (style.isObfuscated())
                    this.formats.add(ChatFormatting.OBFUSCATED);

                if (!this.formats.equals(this.oldFormats)) {
                    if (reset) {
                        if (this.first) {
                            this.first = false;
                        } else {
                            builder.append(ChatFormatting.RESET);
                        }
                    }
                    for (ChatFormatting format : this.formats)
                        builder.append(format);
                    this.oldFormats.clear();
                    this.oldFormats.addAll(this.formats);
                }

                builder.appendCodePoint(codePoint);
                return true;
            }
        });

        return builder.toString();
    }
}