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/arena/dropper/DropperArenaGameMode.java

@@ -0,0 +1,67 @@
+package net.knarcraft.minigames.arena.dropper;
+
+import net.knarcraft.minigames.arena.ArenaGameMode;
+import org.bukkit.configuration.serialization.ConfigurationSerializable;
+import org.jetbrains.annotations.NotNull;
+
+import java.util.HashMap;
+import java.util.Map;
+
+/**
+ * A representation of possible arena game-modes
+ */
+public enum DropperArenaGameMode implements ConfigurationSerializable, ArenaGameMode {
+
+    /**
+     * The default game-mode. Failing once throws the player out.
+     */
+    DEFAULT,
+
+    /**
+     * A game-mode where the player's directional buttons are inverted
+     */
+    INVERTED,
+
+    /**
+     * A game-mode which swaps between normal and inverted controls on a set schedule of a few seconds
+     */
+    RANDOM_INVERTED,
+    ;
+
+    /**
+     * Tries to match the correct game-mode according to the given string
+     *
+     * @param gameMode <p>The game-mode string to match</p>
+     * @return <p>The specified arena game-mode</p>
+     */
+    public static @NotNull DropperArenaGameMode matchGamemode(@NotNull String gameMode) {
+        String sanitized = gameMode.trim().toLowerCase();
+        if (sanitized.matches("(invert(ed)?|inverse)")) {
+            return DropperArenaGameMode.INVERTED;
+        } else if (sanitized.matches("rand(om)?")) {
+            return DropperArenaGameMode.RANDOM_INVERTED;
+        } else {
+            return DropperArenaGameMode.DEFAULT;
+        }
+    }
+
+    @NotNull
+    @Override
+    public Map<String, Object> serialize() {
+        Map<String, Object> data = new HashMap<>();
+        data.put("name", this.name());
+        return data;
+    }
+
+    /**
+     * Deserializes the arena game-mode specified by the given data
+     *
+     * @param data <p>The data to deserialize</p>
+     * @return <p>The deserialized arena game-mode</p>
+     */
+    @SuppressWarnings("unused")
+    public static DropperArenaGameMode deserialize(Map<String, Object> data) {
+        return DropperArenaGameMode.valueOf((String) data.get("name"));
+    }
+
+}