Finishes the changes for parkour arenas, hopefully

src/main/java/net/knarcraft/minigames/arena/AbstractPlayerEntryState.java

@@ -0,0 +1,69 @@
+package net.knarcraft.minigames.arena;
+
+import org.bukkit.GameMode;
+import org.bukkit.Location;
+import org.bukkit.entity.Player;
+import org.bukkit.potion.PotionEffect;
+import org.bukkit.potion.PotionEffectType;
+import org.jetbrains.annotations.NotNull;
+
+/**
+ * An abstract representation of a player's entry state
+ */
+public abstract class AbstractPlayerEntryState implements PlayerEntryState {
+
+    protected final Player player;
+    private final boolean makePlayerInvisible;
+    private final Location entryLocation;
+    private final boolean originalIsFlying;
+    private final GameMode originalGameMode;
+    private final boolean originalAllowFlight;
+    private final boolean originalInvulnerable;
+    private final boolean originalIsSwimming;
+    private final boolean originalCollideAble;
+
+    /**
+     * Instantiates a new abstract player entry state
+     *
+     * @param player              <p>The player whose state this should keep track of</p>
+     * @param makePlayerInvisible <p>Whether players should be made invisible while in the arena</p>
+     */
+    public AbstractPlayerEntryState(@NotNull Player player, boolean makePlayerInvisible) {
+        this.player = player;
+        this.makePlayerInvisible = makePlayerInvisible;
+        this.entryLocation = player.getLocation().clone();
+        this.originalIsFlying = player.isFlying();
+        this.originalGameMode = player.getGameMode();
+        this.originalAllowFlight = player.getAllowFlight();
+        this.originalInvulnerable = player.isInvulnerable();
+        this.originalIsSwimming = player.isSwimming();
+        this.originalCollideAble = player.isCollidable();
+    }
+
+    @Override
+    public void setArenaState() {
+        if (this.makePlayerInvisible) {
+            this.player.addPotionEffect(new PotionEffect(PotionEffectType.INVISIBILITY,
+                    PotionEffect.INFINITE_DURATION, 3));
+        }
+    }
+
+    @Override
+    public void restore() {
+        this.player.setFlying(this.originalIsFlying);
+        this.player.setGameMode(this.originalGameMode);
+        this.player.setAllowFlight(this.originalAllowFlight);
+        this.player.setInvulnerable(this.originalInvulnerable);
+        this.player.setSwimming(this.originalIsSwimming);
+        this.player.setCollidable(this.originalCollideAble);
+        if (this.makePlayerInvisible) {
+            this.player.removePotionEffect(PotionEffectType.INVISIBILITY);
+        }
+    }
+
+    @Override
+    public Location getEntryLocation() {
+        return this.entryLocation;
+    }
+
+}