Denies playing hardcore in a no-checkpoint arena

src/main/java/net/knarcraft/minigames/arena/parkour/ParkourArena.java

@@ -222,6 +222,15 @@ public class ParkourArena implements Arena {
         return copy;
     }
 
+    /**
+     * Gets whether this arena has no checkpoints
+     *
+     * @return <p>True if this arena has no checkpoints</p>
+     */
+    public boolean hasNoCheckpoints() {
+        return this.checkpoints.isEmpty();
+    }
+
     /**
      * Gets this arena's sanitized name
      *

src/main/java/net/knarcraft/minigames/arena/parkour/ParkourArenaGameMode.java

@@ -18,7 +18,7 @@ public enum ParkourArenaGameMode implements ConfigurationSerializable, ArenaGame
     DEFAULT,
 
     /**
-     * A hard-core game mode where no checkpoints are allowed
+     * A hardcore game mode where no checkpoints are allowed
      */
     HARDCORE,
     ;

src/main/java/net/knarcraft/minigames/command/parkour/JoinParkourArenaCommand.java

@@ -71,6 +71,12 @@ public class JoinParkourArenaCommand implements CommandExecutor {
             gameMode = ParkourArenaGameMode.DEFAULT;
         }
 
+        // Don't allow joining the hardcore game-mode if there are no checkpoints to skip
+        if (specifiedArena.hasNoCheckpoints() && gameMode == ParkourArenaGameMode.HARDCORE) {
+            player.sendMessage(Message.ERROR_HARDCORE_NO_CHECKPOINTS.getMessage());
+            return false;
+        }
+
         // Make sure the player has beaten the necessary levels
         ParkourArenaGroup arenaGroup = MiniGames.getInstance().getParkourArenaHandler().getGroup(specifiedArena.getArenaId());
         if (arenaGroup != null && !doGroupChecks(specifiedArena, arenaGroup, gameMode, player)) {

src/main/java/net/knarcraft/minigames/config/Message.java

@@ -135,6 +135,11 @@ public enum Message {
      */
     ERROR_ILLEGAL_COMMAND("&cYou cannot use that command while in an arena!"),
 
+    /**
+     * The message displayed if the player is trying to join a parkour arena on hardcore which has no checkpoints
+     */
+    ERROR_HARDCORE_NO_CHECKPOINTS("&cThis arena cannot be played in hardcore mode as it has no checkpoints!"),
+
     /* **************** *
      * Success messages *
      * **************** */