src/main/java/me/xmrvizzy/skyblocker/utils/SlayerUtils.java


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package me.xmrvizzy.skyblocker.utils;

import net.minecraft.client.MinecraftClient;
import net.minecraft.client.network.ClientPlayerEntity;
import net.minecraft.entity.Entity;
import net.minecraft.entity.decoration.ArmorStandEntity;
import net.minecraft.scoreboard.Scoreboard;
import net.minecraft.scoreboard.ScoreboardDisplaySlot;
import net.minecraft.scoreboard.ScoreboardObjective;
import net.minecraft.scoreboard.ScoreboardPlayerScore;
import net.minecraft.scoreboard.Team;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

import java.util.List;

//TODO Slayer Packet system that can provide information about the current slayer boss, abstract so that different bosses can have different info
public class SlayerUtils {
    private static final Logger LOGGER = LoggerFactory.getLogger(SlayerUtils.class);

    //TODO: Cache this, probably included in Packet system
    public static List<Entity> getEntityArmorStands(Entity entity) {
        return entity.getEntityWorld().getOtherEntities(entity, entity.getBoundingBox().expand(1F, 2.5F, 1F), x -> x instanceof ArmorStandEntity && x.hasCustomName());
    }

    //Eventually this should be modified so that if you hit a slayer boss all slayer features will work on that boss.
    public static Entity getSlayerEntity() {
        if (MinecraftClient.getInstance().world != null) {
            for (Entity entity : MinecraftClient.getInstance().world.getEntities()) {
                //Check if entity is Bloodfiend
                if (entity.hasCustomName() && entity.getCustomName().getString().contains("Bloodfiend")) {
                    //Grab the players username
                    String username = MinecraftClient.getInstance().getSession().getUsername();
                    //Check all armor stands around the boss
                    for (Entity armorStand : getEntityArmorStands(entity)) {
                        //Check if the display name contains the players username
                        if (armorStand.getDisplayName().getString().contains(username)) {
                            return entity;
                        }
                    }
                }
            }
        }
        return null;
    }

    public static boolean isInSlayer() {
        try {
            ClientPlayerEntity client = MinecraftClient.getInstance().player;
            if (client == null) return false;
            Scoreboard scoreboard = MinecraftClient.getInstance().player.getScoreboard();
            ScoreboardObjective objective = scoreboard.getObjectiveForSlot(ScoreboardDisplaySlot.FROM_ID.apply(1));
            for (ScoreboardPlayerScore score : scoreboard.getAllPlayerScores(objective)) {
                Team team = scoreboard.getPlayerTeam(score.getPlayerName());
                if (team != null) {
                    String line = team.getPrefix().getString() + team.getSuffix().getString();
                    if (line.contains("Slay the boss!")) {
                        return true;
                    }
                }
            }
        } catch (NullPointerException e) {
            LOGGER.error("[Skyblocker] Error while checking if player is in slayer", e);
        }
        return false;
    }
}