Flags for Block Explode (#1899)

* add Block Explosion support for TNT_DAMAGE flag

* prevent block explosion from damaging entities

* seperated flags for block explode

* invert and cancel

* pattern instanceof

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

@@ -10,6 +10,7 @@ import org.bukkit.entity.Projectile;
 import org.bukkit.event.EventHandler;
 import org.bukkit.event.EventPriority;
 import org.bukkit.event.block.Action;
+import org.bukkit.event.block.BlockExplodeEvent;
 import org.bukkit.event.entity.EntityChangeBlockEvent;
 import org.bukkit.event.entity.EntityDamageByEntityEvent;
 import org.bukkit.event.entity.EntityDamageEvent;
@@ -50,8 +51,8 @@ public class TNTListener extends FlagListener {
         // Stop TNT from being damaged if it is being caused by a visitor with a flaming arrow
         if (e.getEntity() instanceof Projectile projectile) {
             // Find out who fired it
-            if (projectile.getShooter() instanceof Player && projectile.getFireTicks() > 0
+            if (projectile.getShooter() instanceof Player shooter && projectile.getFireTicks() > 0
-                    && !checkIsland(e, (Player)projectile.getShooter(), e.getBlock().getLocation(), Flags.TNT_PRIMING)) {
+                    && !checkIsland(e, shooter, e.getBlock().getLocation(), Flags.TNT_PRIMING)) {
                 // Remove the arrow
                 projectile.remove();
                 e.setCancelled(true);
@@ -82,12 +83,17 @@ public class TNTListener extends FlagListener {
     @EventHandler(priority = EventPriority.LOW, ignoreCancelled = true)
     public void onExplosion(final EntityExplodeEvent e) {
         // Check world and types
-        if (getIWM().inWorld(e.getLocation()) && TNT_TYPES.contains(e.getEntityType())) {
+        if (!getIWM().inWorld(e.getLocation()) || !TNT_TYPES.contains(e.getEntityType())) {
-            // Remove any blocks from the explosion list if required
+            return;
-            e.blockList().removeIf(b -> protect(b.getLocation()));
-            e.setCancelled(protect(e.getLocation()));
         }
 
+        if (protect(e.getLocation())) {
+            // This is protected as a whole, so just cancel the event
+            e.setCancelled(true);
+        } else {
+            // Remove any blocks from the explosion list if required
+            e.blockList().removeIf(b -> protect(b.getLocation()));
+        }
     }
 
     protected boolean protect(Location location) {
@@ -109,4 +115,43 @@ public class TNTListener extends FlagListener {
             e.setCancelled(protect(e.getEntity().getLocation()));
         }
     }
+
+    protected boolean protectBlockExplode(Location location) {
+        return getIslands().getProtectedIslandAt(location).map(i -> !i.isAllowed(Flags.BLOCK_EXPLODE_DAMAGE))
+                .orElseGet(() -> !Flags.WORLD_BLOCK_EXPLODE_DAMAGE.isSetForWorld(location.getWorld()));
+    }
+
+    /**
+     * Prevents block explosion from breaking blocks
+     * @param e - event
+     */
+    @EventHandler(priority = EventPriority.LOW, ignoreCancelled = true)
+    public void onExplosion(final BlockExplodeEvent e) {
+        // Check world
+        if (!getIWM().inWorld(e.getBlock().getLocation())) {
+            return;
+        }
+
+        if (protectBlockExplode(e.getBlock().getLocation())) {
+            // This is protected as a whole, so just cancel the event
+            e.setCancelled(true);
+        } else {
+            // Remove any blocks from the explosion list if required
+            e.blockList().removeIf(b -> protectBlockExplode(b.getLocation()));
+        }
+    }
+
+    /**
+     * Prevents block explosion from damaging entities.
+     * @param e event
+     */
+    @EventHandler(priority = EventPriority.LOW, ignoreCancelled = true)
+    public void onExplosion(final EntityDamageEvent e) {
+        // Check if this in world and a block explosion
+        if (getIWM().inWorld(e.getEntity().getLocation())
+                && e.getCause().equals(EntityDamageEvent.DamageCause.BLOCK_EXPLOSION)) {
+            // Check if it is disallowed, then cancel it.
+            e.setCancelled(protectBlockExplode(e.getEntity().getLocation()));
+        }
+    }
 }

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

@@ -392,6 +392,14 @@ public final class Flags {
     public static final Flag TNT_DAMAGE = new Flag.Builder("TNT_DAMAGE", Material.TNT).type(Type.SETTING)
             .mode(Flag.Mode.ADVANCED).build();
 
+    /**
+     * If {@code false}, prevents Block Explode from breaking blocks and damaging nearby entities.
+     * @since 1.19.1
+     * @see TNTListener
+     */
+    public static final Flag BLOCK_EXPLODE_DAMAGE = new Flag.Builder("BLOCK_EXPLODE_DAMAGE", Material.TNT_MINECART).type(Type.SETTING)
+            .mode(Flag.Mode.ADVANCED).build();
+
     /**
      * If {@code false}, prevents TNT from breaking blocks and damaging nearby entities outside of island boundaries.
      * @since 1.15.3
@@ -401,6 +409,15 @@ public final class Flags {
             .type(Type.WORLD_SETTING)
             .build();
 
+    /**
+     * If {@code false}, prevents Block Explode from breaking blocks and damaging nearby entities outside of island boundaries.
+     * @since 1.19.1
+     * @see TNTListener
+     */
+    public static final Flag WORLD_BLOCK_EXPLODE_DAMAGE = new Flag.Builder("WORLD_BLOCK_EXPLODE_DAMAGE", Material.TNT_MINECART)
+            .type(Type.WORLD_SETTING)
+            .build();
+
     /*
      * World Settings - they apply to every island in the game worlds.
      */

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

@@ -815,6 +815,12 @@ protection:
       name: "Barrels"
       description: "Toggle barrel interaction"
       hint: "Barrel access disabled"
+    BLOCK_EXPLODE_DAMAGE:
+      description: |-
+        &a Allow Bed & Respawn Anchors
+        &a to break blocks and damage
+        &a entities.
+      name: "Block explode damage"
     COMPOSTER:
       name: "Composters"
       description: "Toggle composter interaction"
@@ -1320,6 +1326,12 @@ protection:
       description: |-
         &a If active, withers can
         &a damage blocks and players
+    WORLD_BLOCK_EXPLODE_DAMAGE:
+      description: |-
+        &a Allow Bed & Respawn Anchors
+        &a to break blocks and damage
+        &a entities outside of island limits.
+      name: "World block explode damage"
     WORLD_TNT_DAMAGE:
       description: |-
         &a Allow TNT and TNT minecarts