Vanish and Invisible commands

Also fixed Drop command definition

src/main/java/com/denizenscript/denizen2sponge/Denizen2Sponge.java

@@ -134,6 +134,7 @@ public void onServerStart(GamePreInitializationEvent event) {
         Denizen2Core.register(new FlagCommand());
         Denizen2Core.register(new HealCommand());
         Denizen2Core.register(new HurtCommand());
+        Denizen2Core.register(new InvisibleCommand());
         Denizen2Core.register(new LookAtCommand());
         Denizen2Core.register(new MountCommand());
         Denizen2Core.register(new PrimeCommand());
@@ -143,6 +144,7 @@ public void onServerStart(GamePreInitializationEvent event) {
         Denizen2Core.register(new TargetCommand());
         Denizen2Core.register(new TeleportCommand());
         Denizen2Core.register(new UnflagCommand());
+        Denizen2Core.register(new VanishCommand());
         // Commands: Item
         Denizen2Core.register(new CreateInventoryCommand());
         Denizen2Core.register(new ForgetInventoryCommand());
@@ -277,7 +279,7 @@ public void onServerStart(GamePreInitializationEvent event) {
         Sponge.getEventManager().post(new Denizen2SpongeLoadingEvent(getGenericCause()));
         // Load Denizen2
         Denizen2Core.start();
-        // Build loaded advamcements
+        // Build loaded advancements
         AdvancementScript.buildAll();
         // Central loop
         Sponge.getScheduler().createTaskBuilder().intervalTicks(1).execute(() -> Denizen2Core.tick(0.05)).submit(this);

src/main/java/com/denizenscript/denizen2sponge/commands/entity/DropCommand.java

@@ -4,6 +4,7 @@
 import com.denizenscript.denizen2core.commands.CommandEntry;
 import com.denizenscript.denizen2core.commands.CommandQueue;
 import com.denizenscript.denizen2core.utilities.debugging.ColorSet;
+import com.denizenscript.denizen2sponge.tags.objects.EntityTag;
 import com.denizenscript.denizen2sponge.tags.objects.ItemTag;
 import com.denizenscript.denizen2sponge.tags.objects.LocationTag;
 import com.denizenscript.denizen2sponge.utilities.UtilLocation;
@@ -57,12 +58,13 @@ public void execute(CommandQueue queue, CommandEntry entry) {
         LocationTag locationTag = LocationTag.getFor(queue.error, entry.getArgumentObject(queue, 1));
         UtilLocation location = locationTag.getInternal();
         if (location.world == null) {
-            queue.handleError(entry, "Invalid location with no world in Spawn command!");
+            queue.handleError(entry, "Invalid location with no world in Drop command!");
             return;
         }
         Entity entity = location.world.createEntity(EntityTypes.ITEM, location.toVector3d());
         entity.offer(Keys.REPRESENTED_ITEM, item.getInternal().createSnapshot());
         location.world.spawnEntity(entity);
+        queue.commandStack.peek().setDefinition("drop_entity", new EntityTag(entity));
         if (queue.shouldShowGood()) {
             queue.outGood("Dropped item " + ColorSet.emphasis + item.debug() + ColorSet.good
                     + " at location " + ColorSet.emphasis + locationTag.debug() + ColorSet.good + "!");

src/main/java/com/denizenscript/denizen2sponge/commands/entity/InvisibleCommand.java

@@ -0,0 +1,61 @@
+package com.denizenscript.denizen2sponge.commands.entity;
+
+import com.denizenscript.denizen2core.commands.AbstractCommand;
+import com.denizenscript.denizen2core.commands.CommandEntry;
+import com.denizenscript.denizen2core.commands.CommandQueue;
+import com.denizenscript.denizen2core.tags.objects.BooleanTag;
+import com.denizenscript.denizen2core.utilities.debugging.ColorSet;
+import com.denizenscript.denizen2sponge.tags.objects.EntityTag;
+import org.spongepowered.api.data.key.Keys;
+
+public class InvisibleCommand extends AbstractCommand {
+
+    // <--[command]
+    // @Since 0.4.0
+    // @Name invisible
+    // @Arguments <entity> <state>
+    // @Short changes the invisibility state of an entity.
+    // @Updated 2018/02/11
+    // @Group Entity
+    // @Minimum 2
+    // @Maximum 2
+    // @Description
+    // Changes the invisibility state of an entity. Invisible entities can't be seen,
+    // but update packets are still sent to the server and clients.
+    // Related commands: <@link command vanish>vanish<@/link>.
+    // @Example
+    // # Makes the player invisible.
+    // - invisible <player> true
+    // -->
+
+    @Override
+    public String getName() {
+        return "invisible";
+    }
+
+    @Override
+    public String getArguments() {
+        return "<entity> <state>";
+    }
+
+    @Override
+    public int getMinimumArguments() {
+        return 2;
+    }
+
+    @Override
+    public int getMaximumArguments() {
+        return 2;
+    }
+
+    @Override
+    public void execute(CommandQueue queue, CommandEntry entry) {
+        EntityTag entity = EntityTag.getFor(queue.error, entry.getArgumentObject(queue, 0));
+        BooleanTag state = BooleanTag.getFor(queue.error, entry.getArgumentObject(queue, 1));
+        entity.getInternal().offer(Keys.INVISIBLE, state.getInternal());
+        if (queue.shouldShowGood()) {
+            queue.outGood("Setting invisible state of entity '" + ColorSet.emphasis + entity.debug()
+                    + ColorSet.good + "' to '" + ColorSet.emphasis + state.debug() + ColorSet.good + "'!");
+        }
+    }
+}

src/main/java/com/denizenscript/denizen2sponge/commands/entity/VanishCommand.java

@@ -0,0 +1,75 @@
+package com.denizenscript.denizen2sponge.commands.entity;
+
+import com.denizenscript.denizen2core.commands.AbstractCommand;
+import com.denizenscript.denizen2core.commands.CommandEntry;
+import com.denizenscript.denizen2core.commands.CommandQueue;
+import com.denizenscript.denizen2core.tags.objects.BooleanTag;
+import com.denizenscript.denizen2core.utilities.debugging.ColorSet;
+import com.denizenscript.denizen2sponge.tags.objects.EntityTag;
+import org.spongepowered.api.data.key.Keys;
+import org.spongepowered.api.entity.Entity;
+
+public class VanishCommand extends AbstractCommand {
+
+    // <--[command]
+    // @Since 0.4.0
+    // @Name vanish
+    // @Arguments <entity> <state>
+    // @Short changes the vanish state of an entity.
+    // @Updated 2018/02/11
+    // @Group Entity
+    // @Minimum 2
+    // @Maximum 2
+    // @Named ignore_collisions (BooleanTag) Sets whether this vanished entity can collide with other entities.
+    // @Named untargeteable (BooleanTag) Sets whether this vanished entity can be selected as a target.
+    // @Description
+    // Changes the vanish state of an entity. Vanished entities don't send packets to clients,
+    // but they can still affect collisions or target selection server-side. This can be adjusted
+    // with the "ignore_collisions" and "untargeteable" named arguments.
+    // but update packets are still sent to the server and clients.
+    // Related commands: <@link command invisible>invisible<@/link>.
+    // @Example
+    // # Vanishes the player and makes it untargeteable and uncollidable.
+    // - vanish <player> true --ignore_collisions true --untargeteable true
+    // -->
+
+    @Override
+    public String getName() {
+        return "vanish";
+    }
+
+    @Override
+    public String getArguments() {
+        return "<entity> <state>";
+    }
+
+    @Override
+    public int getMinimumArguments() {
+        return 2;
+    }
+
+    @Override
+    public int getMaximumArguments() {
+        return 2;
+    }
+
+    @Override
+    public void execute(CommandQueue queue, CommandEntry entry) {
+        EntityTag entityTag = EntityTag.getFor(queue.error, entry.getArgumentObject(queue, 0));
+        BooleanTag state = BooleanTag.getFor(queue.error, entry.getArgumentObject(queue, 1));
+        Entity entity = entityTag.getInternal();
+        entity.offer(Keys.VANISH, state.getInternal());
+        if (entry.namedArgs.containsKey("ignore_collisions")) {
+            BooleanTag bt = BooleanTag.getFor(queue.error, entry.getNamedArgumentObject(queue, "ignore_collisions"));
+            entity.offer(Keys.VANISH_IGNORES_COLLISION, bt.getInternal());
+        }
+        if (entry.namedArgs.containsKey("untargeteable")) {
+            BooleanTag bt = BooleanTag.getFor(queue.error, entry.getNamedArgumentObject(queue, "untargeteable"));
+            entity.offer(Keys.VANISH_PREVENTS_TARGETING, bt.getInternal());
+        }
+        if (queue.shouldShowGood()) {
+            queue.outGood("Setting vanish state of entity '" + ColorSet.emphasis + entityTag.debug()
+                    + ColorSet.good + "' to '" + ColorSet.emphasis + state.debug() + ColorSet.good + "'!");
+        }
+    }
+}