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/PlayerTeleporter.java

@@ -0,0 +1,67 @@
+package net.knarcraft.minigames.util;
+
+import net.knarcraft.minigames.MiniGames;
+import org.bukkit.Bukkit;
+import org.bukkit.Location;
+import org.bukkit.entity.Entity;
+import org.bukkit.entity.Player;
+import org.bukkit.util.Vector;
+
+/**
+ * A helper class for teleporting players
+ */
+public final class PlayerTeleporter {
+
+    private PlayerTeleporter() {
+
+    }
+
+    /**
+     * Teleports the given player to the given location
+     *
+     * <p>Forcing teleport should only be used inside an arena, to prevent the player from becoming stuck.</p>
+     *
+     * @param player      <p>The player about to teleport</p>
+     * @param location    <p>The location the player should be teleported to</p>
+     * @param force       <p>Whether to force a player teleport, even in a vehicle or a passenger</p>
+     * @param immediately <p>Whether to to the teleportation immediately, not using any timers</p>
+     * @return <p>True if the player was successfully teleported</p>
+     */
+    public static boolean teleportPlayer(Player player, Location location, boolean force, boolean immediately) {
+        if (!player.getPassengers().isEmpty()) {
+            if (force) {
+                for (Entity passenger : player.getPassengers()) {
+                    passenger.eject();
+                    passenger.teleport(location);
+                }
+            } else {
+                player.sendMessage("You cannot be teleported with a passenger!");
+                return false;
+            }
+        }
+        if (player.isInsideVehicle()) {
+            if (force && player.getVehicle() != null) {
+                Entity vehicle = player.getVehicle();
+                player.eject();
+                vehicle.teleport(location);
+            } else {
+                player.sendMessage("You cannot be teleported while in a vehicle");
+                return false;
+            }
+        }
+        //Stop the existing player velocity to prevent unevenness between players
+        player.setVelocity(new Vector(0, 0, 0));
+        player.setInvulnerable(true);
+        player.teleport(location);
+        player.setVelocity(new Vector(0, 0, 0));
+        //When teleporting a player out of the arena, sometimes the move listener is slow to react, giving the player 
+        // lethal velocity, and causing damage. That's why the player is given 5 ticks of invulnerability
+        if (!immediately) {
+            Bukkit.getScheduler().runTaskLater(MiniGames.getInstance(), () -> player.setInvulnerable(false), 5);
+        } else {
+            player.setInvulnerable(false);
+        }
+        return true;
+    }
+
+}