Added ELYTRA protection flag.

https://github.com/BentoBoxWorld/BentoBox/issues/386

src/main/java/world/bentobox/bentobox/listeners/flags/protection/ElytraListener.java

@@ -0,0 +1,44 @@
+package world.bentobox.bentobox.listeners.flags.protection;
+
+import org.bukkit.Material;
+import org.bukkit.entity.Player;
+import org.bukkit.event.EventHandler;
+import org.bukkit.event.EventPriority;
+import org.bukkit.event.entity.EntityToggleGlideEvent;
+import org.bukkit.event.player.PlayerTeleportEvent;
+
+import world.bentobox.bentobox.api.flags.FlagListener;
+import world.bentobox.bentobox.api.user.User;
+import world.bentobox.bentobox.lists.Flags;
+
+public class ElytraListener extends FlagListener {
+
+
+    /**
+     * Handle visitors using elytra
+     * @param e - event
+     */
+    @EventHandler(priority = EventPriority.LOW, ignoreCancelled = true)
+    public void onGlide(EntityToggleGlideEvent e) {
+        if (e.getEntity() instanceof Player) {
+            Player player = (Player) e.getEntity();
+            checkIsland(e, player, player.getLocation(), Flags.ELYTRA);
+        }
+    }
+
+    @EventHandler(priority = EventPriority.LOW, ignoreCancelled = true)
+    public void wearingElytra(PlayerTeleportEvent e) {
+        if (!getIWM().inWorld(e.getTo())) {
+            return;
+        }
+        User user = User.getInstance(e.getPlayer());
+        // Check user's inventory
+        if (user.getInventory().all(Material.ELYTRA).isEmpty()) {
+            return;
+        }
+        if (getIslands().getProtectedIslandAt(e.getTo()).filter(i-> !i.isAllowed(user, Flags.ELYTRA)).isPresent()) {
+            user.notify("protection.flags.ELYTRA.hint");
+        }
+    }
+
+}

src/main/java/world/bentobox/bentobox/lists/Flags.java

@@ -18,6 +18,7 @@ import world.bentobox.bentobox.listeners.flags.protection.BreedingListener;
 import world.bentobox.bentobox.listeners.flags.protection.BucketListener;
 import world.bentobox.bentobox.listeners.flags.protection.DyeListener;
 import world.bentobox.bentobox.listeners.flags.protection.EggListener;
+import world.bentobox.bentobox.listeners.flags.protection.ElytraListener;
 import world.bentobox.bentobox.listeners.flags.protection.EntityInteractListener;
 import world.bentobox.bentobox.listeners.flags.protection.ExperiencePickupListener;
 import world.bentobox.bentobox.listeners.flags.protection.FireListener;
@@ -419,6 +420,13 @@ public final class Flags {
      */
     public static final Flag DYE = new Flag.Builder("DYE", Material.LIGHT_BLUE_DYE).type(Type.PROTECTION).listener(new DyeListener()).build();
 
+    /**
+     * Protects against visitors using elytra. By default, it is allowed.
+     *
+     * @since 1.6.0
+     */
+    public static final Flag ELYTRA = new Flag.Builder("ELYTRA",  Material.ELYTRA).type(Type.PROTECTION).defaultRank(RanksManager.VISITOR_RANK).listener(new ElytraListener()).build();
+
     /**
      * Provides a list of all the Flag instances contained in this class using reflection.
      * @return List of all the flags in this class

src/main/resources/locales/en-US.yml

@@ -616,6 +616,10 @@ protection:
       name: "Droppers"
       description: "Toggle dropper interaction"
       hint: "Dropper interaction disabled"
+    ELYTRA:
+      name: "Elytra"
+      description: "Toggle elytra allowed or not"
+      hint: "&cWARNING: Elytra cannot be used here!"
     HOPPER:
       name: "Hoppers"
       description: "Toggle hopper interaction"