BauSystem/BauSystem_Main/src/de/steamwar/bausystem/tracer/TNTTracer.java

package de.steamwar.bausystem.tracer;

import de.steamwar.bausystem.BauSystem;
import de.steamwar.core.Core;
import net.md_5.bungee.api.ChatMessageType;
import net.md_5.bungee.api.chat.TextComponent;
import org.bukkit.Bukkit;
import org.bukkit.Location;
import org.bukkit.Material;
import org.bukkit.Particle;
import org.bukkit.entity.Player;

import java.util.Set;

public class TNTTracer {
    private TNTTracer(){}

    static final boolean DEBUG = false;

    private static final Object synchronizer = new Object();
    private static final TraceCache traceCache = new TraceCache();

    public static void init(){
        Bukkit.getScheduler().runTaskTimer(BauSystem.getPlugin(), () -> {
            synchronized (synchronizer) {
                synchronizer.notifyAll();
            }
        }, 1, 20);
        Bukkit.getScheduler().runTaskAsynchronously(BauSystem.getPlugin(), () -> {
            while (true) {
                synchronized (synchronizer) {
                    try {
                        synchronizer.wait();
                    } catch (InterruptedException e) {
                        Thread.currentThread().interrupt();
                    }
                }
                run();
            }
        });
    }

    private static void run(){
        for (Player p : Bukkit.getOnlinePlayers()) {
            if (DEBUG) {
                String actionBar = "§e" + TraceManager.getAllTraces().size() + " §cTraces   §e" + ShowManager.get(p).getShowRadius() + " §cRadius";
                p.spigot().sendMessage(ChatMessageType.ACTION_BAR, TextComponent.fromLegacyText(actionBar));
            }

            boolean dirty = ShowManager.get(p).isDirty();
            if (ShowManager.get(p).getDisplayType() == ShowManager.DisplayType.Block && !dirty) {
                continue;
            }
            Set<TraceCache.Loc> toHide = traceCache.update(p, dirty);
            Set<TraceCache.Loc> toShow = traceCache.get(p);

            hideBlockTraces(toHide, p);
            showTraces(toShow, ShowManager.get(p).getDisplayType(), p);
        }
    }

    private static void hideBlockTraces(Set<TraceCache.Loc> locs, Player player) {
        if (locs.isEmpty()) return;

        for (TraceCache.Loc l : locs) {
            hideBlock(player, l.x, l.y - 0.49F, l.z);
        }
    }

    private static void showTraces(Set<TraceCache.Loc> locs, ShowManager.DisplayType displayMode, Player player) {
        if (locs.isEmpty()) return;

        for (TraceCache.Loc l : locs) {
            if (displayMode == ShowManager.DisplayType.Block) {
                showBlock(player, l.x, l.y - 0.49F, l.z, getMaterial(l), (l.updatePoint ? (byte) 5 : (byte) 14));
            } else {
                showCorner(player, l.x - 0.49F, l.y, l.z - 0.49F, (l.updatePoint ? Particle.FLAME : Particle.VILLAGER_HAPPY));
            }
        }
    }

    private static Material getMaterial(TraceCache.Loc l){
        switch(Core.getVersion()){
            case 15:
                return TNTTracer_15.getMaterial(l.updatePoint);
            default:
                return TNTTracer_12.getMaterial();
        }
    }

    private static void showCorner(Player player, float x, float y, float z, Particle particle) {
        player.spawnParticle(particle, makeLocation(x + 0.00F, y + 0.00F, z + 0.00F), 1, 0F, 0F, 0F, 0.001);
        player.spawnParticle(particle, makeLocation(x + 0.98F, y + 0.00F, z + 0.00F), 1, 0F, 0F, 0F, 0.001);
        player.spawnParticle(particle, makeLocation(x + 0.00F, y + 0.00F, z + 0.98F), 1, 0F, 0F, 0F, 0.001);
        player.spawnParticle(particle, makeLocation(x + 0.98F, y + 0.00F, z + 0.98F), 1, 0F, 0F, 0F, 0.001);

        player.spawnParticle(particle, makeLocation(x + 0.00F, y + 0.98F, z + 0.00F), 1, 0F, 0F, 0F, 0.001);
        player.spawnParticle(particle, makeLocation(x + 0.98F, y + 0.98F, z + 0.00F), 1, 0F, 0F, 0F, 0.001);
        player.spawnParticle(particle, makeLocation(x + 0.00F, y + 0.98F, z + 0.98F), 1, 0F, 0F, 0F, 0.001);
        player.spawnParticle(particle, makeLocation(x + 0.98F, y + 0.98F, z + 0.98F), 1, 0F, 0F, 0F, 0.001);
    }

    private static void showBlock(Player p, float x, float y, float z, Material block, byte b) {
        if (makeLocation(x, y, z).getBlock().getType() == Material.AIR) {
            p.sendBlockChange(makeLocation(x, y, z), block, b);
        }
    }

    private static void hideBlock(Player p, float x, float y, float z) {
        if (makeLocation(x, y, z).getBlock().getType() == Material.AIR) {
            p.sendBlockChange(makeLocation(x, y, z), Material.AIR, (byte) 0);
        }
    }

    private static final Location location = new Location(Bukkit.getWorlds().get(0), 0, 0, 0);
    private static Location makeLocation(float x, float y, float z) {
        location.setX(x);
        location.setY(y);
        location.setZ(z);
        return location;
    }
}