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DisplayItemCommand.java
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DisplayItemCommand.java
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package com.denizenscript.denizen.scripts.commands.item;
import com.denizenscript.denizen.Denizen;
import com.denizenscript.denizen.nms.NMSHandler;
import com.denizenscript.denizen.scripts.containers.core.ItemScriptHelper;
import com.denizenscript.denizen.utilities.debugging.Debug;
import com.denizenscript.denizen.objects.EntityTag;
import com.denizenscript.denizen.objects.ItemTag;
import com.denizenscript.denizen.objects.LocationTag;
import com.denizenscript.denizencore.exceptions.InvalidArgumentsException;
import com.denizenscript.denizencore.objects.Argument;
import com.denizenscript.denizencore.objects.core.DurationTag;
import com.denizenscript.denizencore.scripts.ScriptEntry;
import com.denizenscript.denizencore.scripts.commands.AbstractCommand;
import org.bukkit.Bukkit;
import org.bukkit.Material;
import org.bukkit.entity.Item;
import org.bukkit.event.EventHandler;
import org.bukkit.event.Listener;
import org.bukkit.event.entity.EntityPickupItemEvent;
import org.bukkit.event.entity.ItemDespawnEvent;
import org.bukkit.event.entity.ItemMergeEvent;
import org.bukkit.event.inventory.InventoryPickupItemEvent;
import org.bukkit.util.Vector;
import java.util.HashSet;
import java.util.UUID;
import java.util.function.Consumer;
public class DisplayItemCommand extends AbstractCommand implements Listener {
public DisplayItemCommand() {
setName("displayitem");
setSyntax("displayitem [<item>] [<location>] (duration:<value>)");
setRequiredArguments(2, 3);
Bukkit.getPluginManager().registerEvents(this, Denizen.getInstance());
isProcedural = false;
}
// <--[command]
// @Name DisplayItem
// @Syntax displayitem [<item>] [<location>] (duration:<value>)
// @Required 2
// @Maximum 3
// @Short Makes a non-touchable item spawn for players to view.
// @Group item
//
// @Description
// This command drops an item at the specified location which cannot be picked up by players.
//
// It accepts a duration which determines how long the item will stay for until disappearing.
// If no duration is specified the item will stay for 1 minute, after which the item will disappear.
// Use "duration:infinite" to indicate that the item should never remove itself.
//
// @Tags
// <EntityTag.item>
// <entry[saveName].dropped> returns a EntityTag of the spawned item.
//
// @Usage
// Use to display a stone block dropped at a players location.
// - displayitem stone <player.location>
//
// @Usage
// Use to display a diamond sword dropped at a relevant location.
// - displayitem diamond_sword <context.location>
//
// @Usage
// Use to display redstone dust dropped at a related location disappear after 10 seconds.
// - displayitem redstone <context.location> duration:10s
//
// @Usage
// Use to save the dropped item to save entry 'item_dropped'.
// - displayitem redstone <context.location> duration:10s save:item_dropped
// -->
@Override
public void addCustomTabCompletions(String arg, Consumer<String> addOne) {
for (Material material : Material.values()) {
if (material.isItem()) {
addOne.accept(material.name());
}
}
for (String itemScript : ItemScriptHelper.item_scripts.keySet()) {
addOne.accept(itemScript);
}
}
@Override
public void parseArgs(ScriptEntry scriptEntry) throws InvalidArgumentsException {
for (Argument arg : scriptEntry.getProcessedArgs()) {
if (arg.matchesArgumentType(DurationTag.class)
&& !scriptEntry.hasObject("duration")) {
scriptEntry.addObject("duration", arg.asType(DurationTag.class));
}
else if (arg.matchesArgumentType(LocationTag.class)
&& !scriptEntry.hasObject("location")) {
scriptEntry.addObject("location", arg.asType(LocationTag.class));
}
else if (arg.matchesArgumentType(ItemTag.class)
&& !scriptEntry.hasObject("item")) {
scriptEntry.addObject("item", arg.asType(ItemTag.class));
}
else {
arg.reportUnhandled();
}
}
if (!scriptEntry.hasObject("item")) {
throw new InvalidArgumentsException("Must specify an item to display.");
}
if (!scriptEntry.hasObject("location")) {
throw new InvalidArgumentsException("Must specify a location!");
}
if (!scriptEntry.hasObject("duration")) {
scriptEntry.addObject("duration", new DurationTag(60));
}
}
public final HashSet<UUID> protectedEntities = new HashSet<>();
@EventHandler
public void onItemMerge(ItemMergeEvent event) {
if (protectedEntities.contains(event.getEntity().getUniqueId())
|| protectedEntities.contains(event.getTarget().getUniqueId())) {
event.setCancelled(true);
}
}
@EventHandler
public void onItemInventoryPickup(InventoryPickupItemEvent event) {
if (protectedEntities.contains(event.getItem().getUniqueId())) {
event.setCancelled(true);
}
}
@EventHandler
public void onItemEntityPickup(EntityPickupItemEvent event) {
if (protectedEntities.contains(event.getItem().getUniqueId())) {
event.setCancelled(true);
}
}
public void onItemDespawn(ItemDespawnEvent event) {
if (protectedEntities.contains(event.getEntity().getUniqueId())) {
event.setCancelled(true);
Bukkit.getScheduler().scheduleSyncDelayedTask(Denizen.getInstance(), () -> {
if (event.getEntity().isValid() && !event.getEntity().isDead()) {
NMSHandler.getEntityHelper().setTicksLived(event.getEntity(), -1000);
}
}, 1);
}
}
@Override
public void execute(ScriptEntry scriptEntry) {
ItemTag item = scriptEntry.getObjectTag("item");
DurationTag duration = scriptEntry.getObjectTag("duration");
LocationTag location = scriptEntry.getObjectTag("location");
if (scriptEntry.dbCallShouldDebug()) {
Debug.report(scriptEntry, getName(), item, duration, location);
}
// Drop the item
final Item dropped = location.getWorld().dropItem(location.getBlockLocation().clone().add(0.5, 1.5, 0.5), item.getItemStack());
dropped.setVelocity(new Vector(0, 0, 0));
dropped.setGravity(false);
dropped.setPickupDelay(32767);
int ticks = duration.getTicksAsInt();
NMSHandler.getEntityHelper().setTicksLived(dropped, ticks <= 0 ? -32768 : -ticks);
if (!dropped.isValid()) {
Debug.echoDebug(scriptEntry, "Item failed to spawned (likely blocked by some plugin).");
return;
}
final UUID itemUUID = dropped.getUniqueId();
protectedEntities.add(itemUUID);
scriptEntry.addObject("dropped", new EntityTag(dropped));
if (ticks > 0) {
Bukkit.getScheduler().scheduleSyncDelayedTask(Denizen.getInstance(),
() -> {
protectedEntities.remove(itemUUID);
if (dropped.isValid() && !dropped.isDead()) {
dropped.remove();
}
}, ticks);
}
}
}