src/de/steamwar/lobby/boatrace/BoatRace.java

@@ -4,6 +4,7 @@ import de.steamwar.entity.REntity;
 import de.steamwar.entity.REntityServer;
 import de.steamwar.entity.RPlayer;
 import de.steamwar.lobby.LobbySystem;
+import de.steamwar.lobby.util.Leaderboard;
 import de.steamwar.sql.UserConfig;
 import org.bukkit.Bukkit;
 import org.bukkit.Location;
@@ -24,6 +25,8 @@ import org.bukkit.scheduler.BukkitTask;
 
 import java.util.*;
 
+import static de.steamwar.lobby.util.Leaderboard.renderTime;
+
 public class BoatRace implements EventListener, Listener {
 
     private static final double MIN_HEIGHT = 4.3;
@@ -31,17 +34,20 @@ public class BoatRace implements EventListener, Listener {
     public static final REntityServer boatNpcServer;
 
     private static boolean oneNotStarted = false;
+    private static final Leaderboard leaderboard;
 
     static {
         boatNpcServer = new REntityServer();
-        new REntity(boatNpcServer, EntityType.VILLAGER, BoatRacePositions.NPC);
+        REntity starter = new REntity(boatNpcServer, EntityType.VILLAGER, BoatRacePositions.NPC);
         boatNpcServer.setCallback((player, rEntity, entityAction) -> {
+            if (rEntity != starter) return;
             Bukkit.getWorlds().get(0).getEntities().stream().filter(entity -> entity.getType() == EntityType.ENDER_CRYSTAL).forEach(Entity::remove);
             if (entityAction == REntityServer.EntityAction.INTERACT && !oneNotStarted) {
                 oneNotStarted = true;
                 new BoatRace(player);
             }
         });
+        leaderboard = new Leaderboard(boatNpcServer, "lobby@boatrace", BoatRacePositions.LEADERBOARD, 5);
     }
 
     private final Player player;
@@ -101,6 +107,7 @@ public class BoatRace implements EventListener, Listener {
                 if (time < best) {
                     LobbySystem.getMessage().send("BOAT_RACE_NEW_BEST", player);
                     UserConfig.updatePlayerConfig(player.getUniqueId(), "lobby@boatrace", String.valueOf(time));
+                    leaderboard.update();
                 }
             } else {
                 player.playSound(player.getLocation(), Sound.ENTITY_PLAYER_LEVELUP, 1, 1);
@@ -148,12 +155,4 @@ public class BoatRace implements EventListener, Listener {
 
         return p.getLocation().getX() >= x1 && p.getLocation().getY() >= y1 && p.getLocation().getZ() >= z1 && p.getLocation().getX() <= x2 && p.getLocation().getY() <= y2 && p.getLocation().getZ() <= z2;
     }
-
-    private String renderTime(long time) {
-        return String.format(
-                "%d:%02d.%03d",
-                time / 60000,
-                (time / 1000) % 60,
-                time % 1000);
-    }
 }

src/de/steamwar/lobby/util/Leaderboard.java

@@ -0,0 +1,89 @@
+package de.steamwar.lobby.util;
+
+import de.steamwar.entity.RArmorStand;
+import de.steamwar.entity.REntity;
+import de.steamwar.entity.REntityServer;
+import de.steamwar.lobby.LobbySystem;
+import de.steamwar.sql.SteamwarUser;
+import de.steamwar.sql.internal.Statement;
+import lombok.AllArgsConstructor;
+import org.bukkit.Location;
+
+import java.util.ArrayList;
+import java.util.HashMap;
+import java.util.List;
+import java.util.Map;
+
+public class Leaderboard {
+
+    private static final Statement LEADERBOARD = new Statement("SELECT User, CAST(Value as integer) AS Time from UserConfig WHERE Config = ? ORDER BY CAST(Value as integer) LIMIT ?");
+
+    private final REntityServer server;
+    private final String configKey;
+    private final Location location;
+    private final int best;
+    private final List<REntity> entities;
+
+    public Leaderboard(REntityServer server, String configKey, Location location, int best) {
+        this.server = server;
+        this.configKey = configKey;
+        this.location = location;
+        this.best = best;
+        entities = new ArrayList<>(best + 2);
+        update();
+    }
+
+    public void update() {
+        entities.forEach(REntity::die);
+        entities.clear();
+        List<LeaderboardEntry> leaderboard = getLeaderboard();
+        long bestTime = leaderboard.get(0).time;
+        for (int i = 0; i <= best; i++) {
+            if (best - i >= leaderboard.size()) continue;
+            LeaderboardEntry entry = leaderboard.get(best - i);
+            RArmorStand entity = new RArmorStand(server, location.clone().add(0, i * 0.32, 0), RArmorStand.Size.MARKER);
+            SteamwarUser user = SteamwarUser.get(entry.user);
+            if (i == best) {
+                entity.setDisplayName("§6§l" + user.getUserName() + " §8• §6§l" + renderTime(entry.time));
+            } else if (i <= best - 1 && i > best - 3) {
+                entity.setDisplayName("§e" + user.getUserName() + " §8• §e" + renderTime(entry.time) + " §8• §e+" + renderShortTime(entry.time - bestTime));
+            } else {
+                entity.setDisplayName("§7" + user.getUserName() + " §8• §7" + renderTime(entry.time) + " §8• §7+" + renderShortTime(entry.time - bestTime));
+            }
+            entity.setInvisible(true);
+            entities.add(entity);
+        }
+    }
+
+    private List<LeaderboardEntry> getLeaderboard() {
+        return LEADERBOARD.select(resultSet -> {
+            List<LeaderboardEntry> leaderboard = new ArrayList<>();
+            while (resultSet.next()) {
+                leaderboard.add(new LeaderboardEntry(resultSet.getInt("User"), resultSet.getLong("Time")));
+            }
+            return leaderboard;
+        }, configKey, best);
+    }
+
+    public static String renderTime(long time) {
+        return String.format(
+                "%d:%02d.%03d",
+                time / 60000,
+                (time / 1000) % 60,
+                time % 1000);
+    }
+
+    public static String renderShortTime(long time) {
+        return String.format(
+                "%d.%03d",
+                time / 1000,
+                time % 1000);
+    }
+
+    @AllArgsConstructor
+    private class LeaderboardEntry {
+
+        private final int user;
+        private final long time;
+    }
+}