Fixes enderpearl usage and flags

https://github.com/BentoBoxWorld/Boxed/issues/50

src/main/java/world/bentobox/boxed/listeners/EnderPearlListener.java

@@ -2,8 +2,10 @@ package world.bentobox.boxed.listeners;
 
 import java.io.IOException;
 
+import org.bukkit.GameMode;
 import org.bukkit.Location;
 import org.bukkit.Sound;
+import org.bukkit.World;
 import org.bukkit.block.BlockFace;
 import org.bukkit.entity.EnderPearl;
 import org.bukkit.entity.EntityType;
@@ -12,8 +14,11 @@ import org.bukkit.event.EventHandler;
 import org.bukkit.event.EventPriority;
 import org.bukkit.event.Listener;
 import org.bukkit.event.entity.ProjectileHitEvent;
+import org.bukkit.event.player.PlayerTeleportEvent;
 
 import world.bentobox.bentobox.api.user.User;
+import world.bentobox.bentobox.database.objects.Island;
+import world.bentobox.bentobox.util.Util;
 import world.bentobox.boxed.Boxed;
 
 /**
@@ -32,34 +37,100 @@ public class EnderPearlListener implements Listener {
         this.addon = addon;
     }
 
+    @EventHandler(priority = EventPriority.LOWEST, ignoreCancelled = true)
+    public void onPlayerTeleport(PlayerTeleportEvent e) {
+        if (!addon.inWorld(e.getFrom()) || !e.getPlayer().getGameMode().equals(GameMode.SURVIVAL)) {
+            return;
+        }
+        User u = User.getInstance(e.getPlayer());
+        // If the to is outside the box, cancel it
+        if (e.getTo() != null) {
+            Island i = addon.getIslands().getIsland(e.getFrom().getWorld(), u);
+            if (i == null || !i.onIsland(e.getTo())) {
+                u.sendMessage("boxed.general.errors.no-teleport-outside");
+                e.setCancelled(true);
+                return;
+            }
+        }
+    }
 
 
     @EventHandler(priority = EventPriority.NORMAL, ignoreCancelled = true)
     public void onEnderPearlLand(ProjectileHitEvent e) {
         if (!e.getEntityType().equals(EntityType.ENDER_PEARL)
                 || e.getHitBlock() == null
-                || !addon.inWorld(e.getHitBlock().getLocation())) {
+                || !addon.inWorld(e.getHitBlock().getLocation())
+                || !Boxed.ALLOW_MOVE_BOX.isSetForWorld(e.getHitBlock().getWorld())
+                ) {
             return;
         }
+        // Moving box is allowed
         Location l = e.getHitBlock().getRelative(BlockFace.UP).getLocation();
+        World w = e.getHitBlock().getWorld();
         EnderPearl ep = (EnderPearl)e.getEntity();
         if (ep.getShooter() instanceof Player player) {
             User u = User.getInstance(player);
+            // Check if enderpearl is inside or outside the box
+            // Get user's box
+            Island is = addon.getIslands().getIsland(w, u);
+            if (is == null) {
+                return; // Nothing to do
+            }       
+            // Get the box that the player is in
+            addon.getIslands().getIslandAt(u.getLocation()).ifPresent(fromIsland -> {
+                // Check that it is their box
+                if (!is.getUniqueId().equals(fromIsland.getUniqueId())) {
+                    return;
+                }
+                // Find where the pearl landed
+                addon.getIslands().getIslandAt(l).ifPresentOrElse(toIsland -> {
+                    if (fromIsland.getUniqueId().equals(toIsland.getUniqueId())) {
+                        if (!toIsland.onIsland(l)) {
+                            // Moving is allowed
+                            moveBox(u, fromIsland, l);
+                            Util.teleportAsync(player, l);
+                            return;
+                        }
+                    } else {
+                        // Different island. This is never allowed. Cancel the throw
+                        e.setCancelled(true);
+                        u.sendMessage("boxed.general.errors.no-teleport-outside");
+                        return;            
+                    }
+                }, () -> {
+                    // No island. This is never allowed. Cancel the throw
+                    e.setCancelled(true);
+                    u.sendMessage("boxed.general.errors.no-teleport-outside");
+                    return;     
+                });
+
+            });
+
+
+
+
             addon.getIslands().getIslandAt(l).ifPresent(i -> {
                 // Check flag
                 if (i.isAllowed(u, Boxed.MOVE_BOX) && addon.getIslands().isSafeLocation(l)) {
-                    // Reset home locations
-                    i.getMemberSet().forEach(uuid -> addon.getIslands().setHomeLocation(uuid, l));
-                    try {
-                        i.setProtectionCenter(l);
-                        i.setSpawnPoint(l.getWorld().getEnvironment(), l);
-                        u.getPlayer().playSound(l, Sound.ENTITY_GENERIC_EXPLODE, 2F, 2F);
-                    } catch (IOException e1) {
-                        addon.logError("Could not move box " + e1.getMessage());
-                    }
+
                 }
             });
         }
     }
 
+
+
+    private void moveBox(User u, Island fromIsland, Location l) {
+        // Reset home locations
+        fromIsland.getMemberSet().forEach(uuid -> addon.getIslands().setHomeLocation(uuid, l));
+        try {
+            fromIsland.setProtectionCenter(l);
+            fromIsland.setSpawnPoint(l.getWorld().getEnvironment(), l);
+            u.getPlayer().playSound(l, Sound.ENTITY_GENERIC_EXPLODE, 2F, 2F);
+        } catch (IOException e1) {
+            addon.logError("Could not move box " + e1.getMessage());
+        }
+
+    }
+
 }

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

@@ -15,6 +15,7 @@ boxed:
       already-have-island: '&c You already have a box!'
       no-safe-location: '&c No safe location found in box!'
       not-owner: '&c You are not the owner of your team!'
+      no-teleport-outside: "&c You cannot teleport outside of your box"
   commands:
     boxed:
       help:
@@ -305,6 +306,12 @@ boxed:
         deleted-island: '&a Area at &e [xyz] &a has been successfully regenerated.'
   protection:
     flags:
+      ALLOW_MOVE_BOX:
+        name: Box moving
+        description: |-
+          &a Allow players to move
+          &a their box by throwing
+          &a enderpearls
       ELYTRA:
         description: Toggle use
       ENDERMAN_GRIEFING: