Add a delay to game closing

Fixes #5

src/main/java/io/github/haykam821/volleyball/game/VolleyballConfig.java

@@ -4,7 +4,10 @@
 import com.mojang.serialization.codecs.RecordCodecBuilder;
 
 import io.github.haykam821.volleyball.entity.BallEntityConfig;
+import net.minecraft.SharedConstants;
 import net.minecraft.util.Identifier;
+import net.minecraft.util.math.intprovider.ConstantIntProvider;
+import net.minecraft.util.math.intprovider.IntProvider;
 import xyz.nucleoid.plasmid.game.common.config.PlayerConfig;
 import xyz.nucleoid.plasmid.game.common.team.GameTeamList;
 
@@ -15,6 +18,7 @@ public class VolleyballConfig {
 			PlayerConfig.CODEC.fieldOf("players").forGetter(VolleyballConfig::getPlayerConfig),
 			GameTeamList.CODEC.fieldOf("teams").forGetter(VolleyballConfig::getTeams),
 			BallEntityConfig.CODEC.optionalFieldOf("ball_entity", BallEntityConfig.DEFAULT).forGetter(VolleyballConfig::getBallEntityConfig),
+			IntProvider.NON_NEGATIVE_CODEC.optionalFieldOf("ticks_until_close", ConstantIntProvider.create(SharedConstants.TICKS_PER_SECOND * 5)).forGetter(VolleyballConfig::getTicksUntilClose),
 			Codec.INT.optionalFieldOf("required_score", 10).forGetter(VolleyballConfig::getRequiredScore),
 			Codec.INT.optionalFieldOf("reset_ball_ticks", 20 * 3).forGetter(VolleyballConfig::getResetBallTicks),
 			Codec.INT.optionalFieldOf("inactive_ball_ticks", 20 * 15).forGetter(VolleyballConfig::getInactiveBallTicks)
@@ -28,12 +32,14 @@ public class VolleyballConfig {
 	private final int requiredScore;
 	private final int resetBallTicks;
 	private final int inactiveBallTicks;
+	private final IntProvider ticksUntilClose;
 
-	public VolleyballConfig(Identifier map, PlayerConfig playerConfig, GameTeamList teams, BallEntityConfig ballEntityConfig, int requiredScore, int resetBallTicks, int inactiveBallTicks) {
+	public VolleyballConfig(Identifier map, PlayerConfig playerConfig, GameTeamList teams, BallEntityConfig ballEntityConfig, IntProvider ticksUntilClose, int requiredScore, int resetBallTicks, int inactiveBallTicks) {
 		this.map = map;
 		this.playerConfig = playerConfig;
 		this.teams = teams;
 		this.ballEntityConfig = ballEntityConfig;
+		this.ticksUntilClose = ticksUntilClose;
 		this.requiredScore = requiredScore;
 		this.resetBallTicks = resetBallTicks;
 		this.inactiveBallTicks = inactiveBallTicks;
@@ -55,6 +61,10 @@ public BallEntityConfig getBallEntityConfig() {
 		return this.ballEntityConfig;
 	}
 
+	public IntProvider getTicksUntilClose() {
+		return this.ticksUntilClose;
+	}
+
 	public int getRequiredScore() {
 		return this.requiredScore;
 	}

src/main/java/io/github/haykam821/volleyball/game/phase/VolleyballActivePhase.java

@@ -58,6 +58,7 @@ public class VolleyballActivePhase implements PlayerAttackEntityEvent, GameActiv
 	private final VolleyballScoreboard scoreboard;
 
 	private BallState ballState;
+	private int ticksUntilClose = -1;
 
 	public VolleyballActivePhase(ServerWorld world, GameSpace gameSpace, VolleyballMap map, TeamManager teamManager, GlobalWidgets widgets, VolleyballConfig config, Text shortName) {
 		this.world = world;
@@ -163,11 +164,21 @@ public void onTick() {
 			entry.onTick();
 		}
 
+		// Decrease ticks until game end to zero
+		if (this.isGameEnding()) {
+			if (this.ticksUntilClose == 0) {
+				this.gameSpace.close(GameCloseReason.FINISHED);
+			}
+
+			this.ticksUntilClose -= 1;
+			return;
+		}
+
 		this.ballState.onTick();
 
 		// Attempt to determine a winner
 		if (this.winManager.checkForWinner()) {
-			gameSpace.close(GameCloseReason.FINISHED);
+			this.endGame();
 		}
 	}
 
@@ -264,6 +275,14 @@ public void setBallState(BallState ballState) {
 		this.ballState = ballState;
 	}
 
+	private void endGame() {
+		this.ticksUntilClose = this.config.getTicksUntilClose().get(this.world.getRandom());
+	}
+
+	private boolean isGameEnding() {
+		return this.ticksUntilClose >= 0;
+	}
+
 	public boolean hasBallLandedOffCourt(Entity ball) {
 		return ball.isOnGround() && !this.map.getBallSpawnBox().intersects(ball.getBoundingBox());
 	}