Added ability to disable mob spawning inside of arenas.

src/main/java/dev/logal/snowbrawl/CommandHandler.java

@@ -404,6 +404,25 @@ public final class CommandHandler {
 		this.snowbrawl.saveConfig();
 	}
 
+	@Command(hook = "set_arena_mobspawningallowed")
+	public void commandArenasMobSpawningAllowed(CommandSender sender, String name, boolean mobSpawningAllowed){
+		Arena arena = this.snowbrawl.getArenaManager().getArenaByName(name);
+		if (arena == null){
+			sender.sendMessage(failMessage("The specified arena does not exist."));
+			return;
+		}
+
+		arena.setMobSpawningAllowed(mobSpawningAllowed);
+
+		if (mobSpawningAllowed){
+			sender.sendMessage(successMessage("Mob spawning is now allowed in arena " + arena.getName() + "."));
+		} else {
+			sender.sendMessage(successMessage("Mob spawning is now blocked in arena " + arena.getName() + "."));
+		}
+
+		this.snowbrawl.saveConfig();
+	}
+
 	/**
 	 * Sets one corner of this arena's bounds to the given coordinates.
 	 *

src/main/java/dev/logal/snowbrawl/Snowbrawl.java

@@ -90,6 +90,7 @@ public final class Snowbrawl extends JavaPlugin {
 			newConfig.set("arenas." + id + ".graceTime", arena.getGraceTime());
 			newConfig.set("arenas." + id + ".matchTime", arena.getMatchTime());
 			newConfig.set("arenas." + id + ".damage", arena.getDamage());
+			newConfig.set("arenas." + id + ".mobspawningallowed", arena.isMobSpawningAllowed());
 			newConfig.set("arenas." + id + ".world", arena.getWorld().getName());
 
 			newConfig.set("arenas." + id + ".pos1.x", arena.getPos1().getX());
@@ -161,6 +162,7 @@ public final class Snowbrawl extends JavaPlugin {
 			arena.setGraceTime(config.getInt("arenas." + id + ".graceTime", Arena.DEFAULT_GRACE_TIME));
 			arena.setMatchTime(config.getInt("arenas." + id + ".matchTime", Arena.DEFAULT_MATCH_TIME));
 			arena.setDamage(config.getInt("arenas." + id + ".damage", Arena.DEFAULT_DAMAGE));
+			arena.setMobSpawningAllowed(config.getBoolean("arenas." + id + ".mobspawningallowed", Arena.DEFAULT_MOB_SPAWNING_ALLOWED));
 
 			// The world can be null because Arena overrides it with the actual world. Only the coordinates matter.
 			arena.setPos1(new Location(null, config.getDouble("arenas." + id + ".pos1.x", Arena.DEFAULT_POS1_X), config.getDouble("arenas." + id + ".pos1.y", Arena.DEFAULT_POS1_Y), config.getDouble("arenas." + id + ".pos1.z", Arena.DEFAULT_POS1_Z)));

src/main/java/dev/logal/snowbrawl/managers/ArenaManager.java

@@ -575,13 +575,16 @@ public class ArenaManager implements Listener {
 	}
 
 	/**
-	 * Not implemented.
+	 * Prevents entities from spawning inside of arenas with mob spawning set to disabled.
 	 *
 	 * @param event The event.
 	 */
 	@EventHandler(ignoreCancelled = true)
 	public void onEntitySpawn(final EntitySpawnEvent event){
-		// TODO: Add configurable option for preventing entity spawns in arenas.
+		final Arena arena = this.getArenaByLocation(event.getEntity().getLocation());
+		if (arena != null && !arena.isMobSpawningAllowed()){
+			event.setCancelled(true);
+		}
 	}
 
 	/**
@@ -902,6 +905,7 @@ public class ArenaManager implements Listener {
 		logger.info(" - Grace Time: " + arena.getGraceTime() + "s");
 		logger.info(" - Match Time: " + arena.getMatchTime() + "s");
 		logger.info(" - Damage: " + arena.getDamage() + " HP");
+		logger.info(" - Mob Spawning Allowed: " + arena.isMobSpawningAllowed());
 		logger.info(" - World: " + arena.getWorld().getName());
 
 		Location pos1 = arena.getPos1(), pos2 = arena.getPos2();

src/main/java/dev/logal/snowbrawl/types/Arena.java

@@ -26,6 +26,7 @@ public class Arena {
 	public static final int DEFAULT_GRACE_TIME = 15 * 20;
 	public static final int DEFAULT_MATCH_TIME = 300 * 20;
 	public static final int DEFAULT_DAMAGE = 4;
+	public static final boolean DEFAULT_MOB_SPAWNING_ALLOWED = false;
 	public static final double DEFAULT_POS1_X = 0, DEFAULT_POS1_Y = 0, DEFAULT_POS1_Z = 0;
 	public static final double DEFAULT_POS2_X = 0, DEFAULT_POS2_Y = 0, DEFAULT_POS2_Z = 0;
 
@@ -39,6 +40,7 @@ public class Arena {
 	private int playerLimit; // Maximum amount of players allowed in this arena in a match.
 	private int graceTime, matchTime;
 	private int damage; // Damage dealt to players per snowball hit.
+	private boolean allowMobSpawning;
 	private World world; // Which world the coordinates apply to.
 	private Location pos1, pos2; // Coordinates identifying the 2 corners of the arena.
 
@@ -60,6 +62,7 @@ public class Arena {
 	public Arena(final String name, final World world){
 		this.setName(name);
 
+		this.setEnabled(DEFAULT_ENABLED);
 		this.setRefill(DEFAULT_REFILL);
 		this.setPlayerLimit(DEFAULT_PLAYER_LIMIT);
 		this.setGraceTime(DEFAULT_GRACE_TIME);
@@ -222,6 +225,24 @@ public class Arena {
 		this.damage = damage;
 	}
 
+	/**
+	 * Gets whether mobs are allowed to naturally spawn in this arena.
+	 *
+	 * @return True if mobs are allowed to spawn, false otherwise.
+	 */
+	public boolean isMobSpawningAllowed(){
+		return this.allowMobSpawning;
+	}
+
+	/**
+	 * Sets whether mobs are allowed to naturally spawn in this arena.
+	 *
+	 * @param allowMobSpawning
+	 */
+	public void setMobSpawningAllowed(final boolean allowMobSpawning){
+		this.allowMobSpawning = allowMobSpawning;
+	}
+
 	/**
 	 * Gets the position of one corner of the bounding box of this arena.
 	 *

src/main/resources/commands.cmd

@@ -96,6 +96,13 @@ command snowbrawl {
 			help Changes the amount of damage done per snowball hit in this arena.;
 		}
 
+		allowmobspawning [boolean:mobspawningallowed] {
+			perm redstoner.snowbrawl.arena.config.mobspawningallowed;
+			run set_arena_mobspawningallowed name mobspawningallowed;
+			type all;
+			help Sets whether mobs are allowed to spawn in this arena.;
+		}
+
 		bounds pos1 {
 			[block_x:x] [block_y:y] [block_z:z] {
 			   run set_arena_pos1 name x y z;