Finishes the changes for parkour arenas, hopefully

src/main/java/net/knarcraft/minigames/command/dropper/CreateDropperArenaCommand.java

@@ -0,0 +1,53 @@
+package net.knarcraft.minigames.command.dropper;
+
+import net.knarcraft.minigames.MiniGames;
+import net.knarcraft.minigames.arena.dropper.DropperArena;
+import net.knarcraft.minigames.arena.dropper.DropperArenaHandler;
+import net.knarcraft.minigames.util.StringSanitizer;
+import org.bukkit.command.Command;
+import org.bukkit.command.CommandExecutor;
+import org.bukkit.command.CommandSender;
+import org.bukkit.entity.Player;
+import org.jetbrains.annotations.NotNull;
+
+/**
+ * The command for creating a new dropper arena
+ */
+public class CreateDropperArenaCommand implements CommandExecutor {
+
+    @Override
+    public boolean onCommand(@NotNull CommandSender commandSender, @NotNull Command command, @NotNull String s,
+                             @NotNull String[] arguments) {
+        if (!(commandSender instanceof Player player)) {
+            commandSender.sendMessage("This command must be used by a player");
+            return false;
+        }
+
+        // Abort if no name was specified
+        if (arguments.length < 1) {
+            return false;
+        }
+
+        // Remove known characters that are likely to cause trouble if used in an arena name
+        String arenaName = StringSanitizer.removeUnwantedCharacters(arguments[0]);
+
+        // An arena name is required
+        if (arenaName.isBlank()) {
+            return false;
+        }
+
+        DropperArenaHandler arenaHandler = MiniGames.getInstance().getDropperArenaHandler();
+
+        DropperArena existingArena = arenaHandler.getArena(arenaName);
+        if (existingArena != null) {
+            commandSender.sendMessage("There already exists a dropper arena with that name!");
+            return false;
+        }
+
+        DropperArena arena = new DropperArena(arenaName, player.getLocation(), arenaHandler);
+        arenaHandler.addArena(arena);
+        commandSender.sendMessage("The arena was successfully created!");
+        return true;
+    }
+
+}