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CitizensEntityTracker.java
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CitizensEntityTracker.java
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package net.citizensnpcs.nms.v1_20_R1.util;
import java.lang.invoke.MethodHandle;
import java.util.Set;
import org.bukkit.Bukkit;
import org.bukkit.entity.EntityType;
import org.bukkit.entity.Player;
import com.google.common.collect.ForwardingSet;
import net.citizensnpcs.Settings.Setting;
import net.citizensnpcs.api.CitizensAPI;
import net.citizensnpcs.api.event.NPCSeenByPlayerEvent;
import net.citizensnpcs.api.npc.NPC;
import net.citizensnpcs.nms.v1_20_R1.entity.EntityHumanNPC;
import net.citizensnpcs.npc.ai.NPCHolder;
import net.citizensnpcs.util.NMS;
import net.citizensnpcs.util.Util;
import net.minecraft.network.protocol.game.ClientboundAnimatePacket;
import net.minecraft.server.level.ChunkMap;
import net.minecraft.server.level.ChunkMap.TrackedEntity;
import net.minecraft.server.level.ServerEntity;
import net.minecraft.server.level.ServerPlayer;
import net.minecraft.server.network.ServerPlayerConnection;
import net.minecraft.world.entity.Entity;
public class CitizensEntityTracker extends ChunkMap.TrackedEntity {
private final Entity tracker;
public CitizensEntityTracker(ChunkMap map, Entity entity, int i, int j, boolean flag) {
map.super(entity, i, j, flag);
this.tracker = entity;
try {
Set<ServerPlayerConnection> set = (Set<ServerPlayerConnection>) TRACKING_SET_GETTER.invoke(this);
TRACKING_SET_SETTER.invoke(this, new ForwardingSet<ServerPlayerConnection>() {
@Override
public boolean add(ServerPlayerConnection conn) {
boolean res = super.add(conn);
if (res) {
updateLastPlayer(conn.getPlayer());
}
return res;
}
@Override
protected Set<ServerPlayerConnection> delegate() {
return set;
}
});
} catch (Throwable e) {
e.printStackTrace();
}
}
public CitizensEntityTracker(ChunkMap map, TrackedEntity entry) {
this(map, getTracker(entry), getTrackingDistance(entry), getE(entry), getF(entry));
}
public void updateLastPlayer(ServerPlayer lastUpdatedPlayer) {
if (tracker.isRemoved() || tracker.getBukkitEntity().getType() != EntityType.PLAYER)
return;
final ServerPlayer entityplayer = lastUpdatedPlayer;
boolean sendTabRemove = NMS.sendTabListAdd(entityplayer.getBukkitEntity(), (Player) tracker.getBukkitEntity());
if (!sendTabRemove || !Setting.DISABLE_TABLIST.asBoolean()) {
Bukkit.getScheduler().scheduleSyncDelayedTask(CitizensAPI.getPlugin(),
() -> NMSImpl.sendPacket(entityplayer.getBukkitEntity(), new ClientboundAnimatePacket(tracker, 0)),
1);
return;
}
Bukkit.getScheduler().scheduleSyncDelayedTask(CitizensAPI.getPlugin(), () -> {
NMSImpl.sendPacket(entityplayer.getBukkitEntity(), new ClientboundAnimatePacket(tracker, 0));
NMS.sendTabListRemove(entityplayer.getBukkitEntity(), (Player) tracker.getBukkitEntity());
}, Setting.TABLIST_REMOVE_PACKET_DELAY.asTicks());
}
@Override
public void updatePlayer(final ServerPlayer entityplayer) {
if (entityplayer instanceof EntityHumanNPC)
return;
if (!tracker.isRemoved() && !seenBy.contains(entityplayer.connection) && tracker instanceof NPCHolder) {
NPC npc = ((NPCHolder) tracker).getNPC();
if (REQUIRES_SYNC == null) {
REQUIRES_SYNC = !Bukkit.isPrimaryThread();
}
NPCSeenByPlayerEvent event = new NPCSeenByPlayerEvent(npc, entityplayer.getBukkitEntity());
Util.callEventPossiblySync(event, REQUIRES_SYNC);
if (event.isCancelled())
return;
Integer trackingRange = npc.data().<Integer> get(NPC.Metadata.TRACKING_RANGE);
if (TRACKING_RANGE_SETTER != null && trackingRange != null
&& npc.data().get("last-tracking-range", -1) != trackingRange.intValue()) {
try {
TRACKING_RANGE_SETTER.invoke(this, trackingRange);
npc.data().set("last-tracking-range", trackingRange);
} catch (Throwable e) {
e.printStackTrace();
}
}
}
super.updatePlayer(entityplayer);
}
private static int getE(TrackedEntity entry) {
try {
return (int) E.invoke(TRACKER_ENTRY.invoke(entry));
} catch (Throwable e) {
e.printStackTrace();
}
return 0;
}
private static boolean getF(TrackedEntity entry) {
try {
return (boolean) F.invoke(TRACKER_ENTRY.invoke(entry));
} catch (Throwable e) {
e.printStackTrace();
}
return false;
}
private static Entity getTracker(TrackedEntity entry) {
try {
return (Entity) TRACKER.invoke(entry);
} catch (Throwable e) {
e.printStackTrace();
}
return null;
}
private static int getTrackingDistance(TrackedEntity entry) {
try {
return (Integer) TRACKING_RANGE.invoke(entry);
} catch (Throwable e) {
e.printStackTrace();
}
return 0;
}
private static final MethodHandle E = NMS.getGetter(ServerEntity.class, "e");
private static final MethodHandle F = NMS.getGetter(ServerEntity.class, "f");
private static Boolean REQUIRES_SYNC;
private static final MethodHandle TRACKER = NMS.getFirstGetter(TrackedEntity.class, Entity.class);
private static final MethodHandle TRACKER_ENTRY = NMS.getFirstGetter(TrackedEntity.class, ServerEntity.class);
private static final MethodHandle TRACKING_RANGE = NMS.getFirstGetter(TrackedEntity.class, int.class);
private static final MethodHandle TRACKING_RANGE_SETTER = NMS.getFirstFinalSetter(TrackedEntity.class, int.class);
private static final MethodHandle TRACKING_SET_GETTER = NMS.getFirstGetter(TrackedEntity.class, Set.class);
private static final MethodHandle TRACKING_SET_SETTER = NMS.getFirstFinalSetter(TrackedEntity.class, Set.class);
}