Add /bottom command

Essentials/src/main/java/com/earth2me/essentials/commands/Commandbottom.java

@@ -0,0 +1,36 @@
+package com.earth2me.essentials.commands;
+
+import com.earth2me.essentials.Trade;
+import com.earth2me.essentials.User;
+import com.earth2me.essentials.utils.LocationUtil;
+import org.bukkit.Location;
+import org.bukkit.Server;
+import org.bukkit.event.player.PlayerTeleportEvent;
+
+import java.util.concurrent.CompletableFuture;
+
+import static com.earth2me.essentials.I18n.tl;
+
+public class Commandbottom extends EssentialsCommand {
+
+    public Commandbottom() {
+        super("bottom");
+    }
+
+    @Override
+    public void run(final Server server, final User user, final String commandLabel, final String[] args) throws Exception {
+        final int bottomX = user.getLocation().getBlockX();
+        final int bottomZ = user.getLocation().getBlockZ();
+        final float pitch = user.getLocation().getPitch();
+        final float yaw = user.getLocation().getYaw();
+        final Location unsafe = new Location(user.getWorld(), bottomX, ess.getWorldInfoProvider().getMinHeight(user.getWorld()), bottomZ, yaw, pitch);
+        final Location safe = LocationUtil.getSafeDestination(ess, unsafe);
+        final CompletableFuture<Boolean> future = getNewExceptionFuture(user.getSource(), commandLabel);
+        future.thenAccept(success -> {
+            if (success) {
+                user.sendMessage(tl("teleportBottom", safe.getWorld().getName(), safe.getBlockX(), safe.getBlockY(), safe.getBlockZ()));
+            }
+        });
+        user.getAsyncTeleport().teleport(safe, new Trade(this.getName(), ess), PlayerTeleportEvent.TeleportCause.COMMAND, future);
+    }
+}

Essentials/src/main/resources/messages.properties

@@ -100,6 +100,8 @@ bookCommandUsage3=/<command> title <title>
 bookCommandUsage3Description=Sets the title of a signed book
 bookLocked=\u00a76This book is now locked.
 bookTitleSet=\u00a76Title of the book set to {0}.
+bottomCommandDescription=Teleport to the lowest block at your current position.
+bottomCommandUsage=/<command>
 breakCommandDescription=Breaks the block you are looking at.
 breakCommandUsage=/<command>
 broadcast=\u00a76[\u00a74Broadcast\u00a76]\u00a7a {0}
@@ -1253,6 +1255,7 @@ teleportationDisabledWarning=\u00a76You must enable teleportation before other p
 teleportationEnabled=\u00a76Teleportation \u00a7cenabled\u00a76.
 teleportationEnabledFor=\u00a76Teleportation \u00a7cenabled \u00a76for \u00a7c{0}\u00a76.
 teleportAtoB=\u00a7c{0}\u00a76 teleported you to \u00a7c{1}\u00a76.
+teleportBottom=\u00a76Teleporting to bottom.
 teleportDisabled=\u00a7c{0} \u00a74has teleportation disabled.
 teleportHereRequest=\u00a7c{0}\u00a76 has requested that you teleport to them.
 teleportHome=\u00a76Teleporting to \u00a7c{0}\u00a76.

Essentials/src/main/resources/plugin.yml

@@ -53,6 +53,10 @@ commands:
     description: Allows reopening and editing of sealed books.
     usage: /<command> [title|author [name]]
     aliases: [ebook]
+  bottom:
+    description: Teleport to the lowest block at your current position.
+    usage: /<command>
+    aliases: [ ebottom ]
   break:
     description: Breaks the block you are looking at.
     usage: /<command>