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Add implementation for data watcher dedicated to hologram
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package de.epiceric.shopchest.nms;
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import org.bukkit.Location;
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public interface FakeArmorStand {
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int getEntityId();
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void sendData(String name);
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void remove();
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void setLocation(Location location);
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void spawn();
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}
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package de.epiceric.shopchest.nms;
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public interface Platform {
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FakeArmorStand createFakeArmorStand();
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}
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@ -23,6 +23,10 @@
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<artifactId>spigot</artifactId>
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<artifactId>spigot</artifactId>
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<classifier>remapped-mojang</classifier>
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<classifier>remapped-mojang</classifier>
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</dependency>
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</dependency>
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<dependency>
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<groupId>de.epiceric</groupId>
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<artifactId>shopchest-nms-interface</artifactId>
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</dependency>
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</dependencies>
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</dependencies>
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<build>
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<build>
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package de.epiceric.shopchest.nms.v1_17_R1;
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import de.epiceric.shopchest.nms.FakeArmorStand;
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import net.minecraft.network.chat.Component;
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import net.minecraft.network.protocol.game.ClientboundSetEntityDataPacket;
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import net.minecraft.network.syncher.EntityDataAccessor;
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import net.minecraft.network.syncher.SynchedEntityData;
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import net.minecraft.world.entity.Entity;
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import org.bukkit.Location;
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import java.lang.reflect.Field;
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import java.util.ArrayList;
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import java.util.List;
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import java.util.Optional;
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import java.util.concurrent.atomic.AtomicInteger;
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public class FakeArmorStandImpl implements FakeArmorStand {
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private final static byte INVISIBLE_FLAG = 0b100000;
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private final static AtomicInteger ENTITY_COUNTER;
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protected static final EntityDataAccessor<Byte> DATA_SHARED_FLAGS_ID;
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private static final EntityDataAccessor<Boolean> DATA_NO_GRAVITY;
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private static final EntityDataAccessor<Optional<Component>> DATA_CUSTOM_NAME;
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private static final EntityDataAccessor<Boolean> DATA_CUSTOM_NAME_VISIBLE;
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private static final EntityDataAccessor<Boolean> DATA_SILENT;
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private final static Field packedItemField;
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static {
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try {
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final Field entityCounterField = Entity.class.getDeclaredField("b"); // ENTITY_COUNTER
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ENTITY_COUNTER = (AtomicInteger) entityCounterField.get(null);
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final Field dataSharedFlagsId = Entity.class.getDeclaredField("Z"); // DATA_SHARED_FLAGS_ID
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DATA_SHARED_FLAGS_ID = forceCast(dataSharedFlagsId.get(null));
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final Field dataNoGravityField = Entity.class.getDeclaredField("aM"); // DATA_NO_GRAVITY
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DATA_NO_GRAVITY = forceCast(dataNoGravityField.get(null));
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final Field dataCustomNameField = Entity.class.getDeclaredField("aJ"); // DATA_CUSTOM_NAME
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DATA_CUSTOM_NAME = forceCast(dataCustomNameField.get(null));
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final Field dataCustomNameVisibleField = Entity.class.getDeclaredField("aK"); // DATA_CUSTOM_NAME_VISIBLE
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DATA_CUSTOM_NAME_VISIBLE = forceCast(dataCustomNameVisibleField.get(null));
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final Field dataSilentField = Entity.class.getDeclaredField("aL"); // DATA_SILENT
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DATA_SILENT = forceCast(dataSilentField.get(null));
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packedItemField = ClientboundSetEntityDataPacket.class.getDeclaredField("b"); // packedItems
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} catch (ReflectiveOperationException e){
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throw new RuntimeException(e);
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}
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}
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@SuppressWarnings("unchecked")
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private static <T> T forceCast(Object o){
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return (T) o;
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}
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private final int entityId;
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public FakeArmorStandImpl() {
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entityId = ENTITY_COUNTER.incrementAndGet();
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}
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@Override
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public int getEntityId() {
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return entityId;
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}
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@Override
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public void sendData(String name) {
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// Create packet
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final SynchedEntityData entityData = new SynchedEntityData(null);
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final ClientboundSetEntityDataPacket dataPacket = new ClientboundSetEntityDataPacket(entityId, entityData, false);
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final List<SynchedEntityData.DataItem<?>> packedItems = new ArrayList<>(5);
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// Setup data
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packedItems.add(new SynchedEntityData.DataItem<>(DATA_SHARED_FLAGS_ID, INVISIBLE_FLAG));
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packedItems.add(new SynchedEntityData.DataItem<>(DATA_NO_GRAVITY, true));
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packedItems.add(new SynchedEntityData.DataItem<>(DATA_CUSTOM_NAME, Optional.ofNullable(Component.Serializer.fromJson(
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"" // TODO Use chat-api to serialize the name
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))));
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packedItems.add(new SynchedEntityData.DataItem<>(DATA_CUSTOM_NAME_VISIBLE, true));
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packedItems.add(new SynchedEntityData.DataItem<>(DATA_SILENT, true));
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try {
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packedItemField.set(dataPacket, packedItems);
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} catch (IllegalAccessException e) {
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throw new RuntimeException(e);
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}
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// Send packet
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}
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@Override
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public void remove() {
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}
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@Override
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public void setLocation(Location location) {
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}
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@Override
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public void spawn() {
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}
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}
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@ -0,0 +1,13 @@
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package de.epiceric.shopchest.nms.v1_17_R1;
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import de.epiceric.shopchest.nms.FakeArmorStand;
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import de.epiceric.shopchest.nms.Platform;
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public class PlatformImpl implements Platform {
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@Override
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public FakeArmorStand createFakeArmorStand() {
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return new FakeArmorStandImpl();
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}
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}
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