Parkour implementation safety save 2

This is just a safety save in case the code gets too broken to fix.

src/main/java/net/knarcraft/minigames/util/TabCompleteHelper.java

@@ -0,0 +1,46 @@
+package net.knarcraft.minigames.util;
+
+import net.knarcraft.minigames.MiniGames;
+import net.knarcraft.minigames.arena.dropper.DropperArena;
+import net.knarcraft.minigames.arena.dropper.DropperArenaEditableProperty;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.ArrayList;
+import java.util.List;
+
+/**
+ * A helper-class for common tab-completions
+ */
+public final class TabCompleteHelper {
+
+    private TabCompleteHelper() {
+
+    }
+
+    /**
+     * Gets the names of all current arenas
+     *
+     * @return <p>All arena names</p>
+     */
+    public static @NotNull List<String> getArenas() {
+        List<String> arenaNames = new ArrayList<>();
+        for (DropperArena dropperArena : MiniGames.getInstance().getDropperArenaHandler().getArenas().values()) {
+            arenaNames.add(dropperArena.getArenaName());
+        }
+        return arenaNames;
+    }
+
+    /**
+     * Gets the argument strings of all arena properties
+     *
+     * @return <p>All arena properties</p>
+     */
+    public static @NotNull List<String> getArenaProperties() {
+        List<String> arenaProperties = new ArrayList<>();
+        for (DropperArenaEditableProperty property : DropperArenaEditableProperty.values()) {
+            arenaProperties.add(property.getArgumentString());
+        }
+        return arenaProperties;
+    }
+
+}