feat: leaderboard placeholders for the built-in score leaderboard

for other types of leaderboard ajLeaderboards is still needed

Author: Misat11

plugin/src/main/java/org/screamingsandals/bedwars/placeholderapi/BedwarsExpansion.java

@@ -25,6 +25,7 @@
 import org.bukkit.entity.Player;
 import org.screamingsandals.bedwars.Main;
 import org.screamingsandals.bedwars.api.game.GameStatus;
+import org.screamingsandals.bedwars.api.statistics.LeaderboardEntry;
 import org.screamingsandals.bedwars.api.statistics.PlayerStatistic;
 import org.screamingsandals.bedwars.game.CurrentTeam;
 import org.screamingsandals.bedwars.game.Game;
@@ -239,9 +240,75 @@ public String onPlaceholderRequest(Player player, String identifier) {
             }
         }
 
+        if (identifier.startsWith("leaderboard_score_")) {
+            if (!Main.isPlayerStatisticsEnabled()) {
+                return null;
+            }
+
+            String remainder = identifier.substring(18);
+            String[] split = remainder.split("_", 2);
+            if (split.length != 2) {
+                return null;
+            }
+
+            int index;
+            try {
+                index = Integer.parseInt(split[0]);
+            } catch (NumberFormatException e) {
+                return null;
+            }
+
+            index--; // 1 -> 0
+            if (index < 0) {
+                return null;
+            }
+
+            LeaderboardEntry entry = Main.getPlayerStatisticsManager().getLeaderboardEntry(index);
+
+            if (entry == null) {
+                switch (split[1].toLowerCase(Locale.ROOT)) {
+                    case "uuid":
+                    case "name":
+                        return "---";
+                    case "score":
+                    case "deaths":
+                    case "destroyed_beds":
+                    case "kills":
+                    case "loses":
+                    case "wins":
+                    case "games":
+                    case "kd":
+                        return "0";
+                }
+            } else {
+                switch (split[1].toLowerCase(Locale.ROOT)) {
+                    case "uuid":
+                        return entry.getPlayer().getUniqueId().toString();
+                    case "name":
+                        return entry.getLatestKnownName();
+                    case "score":
+                        return Integer.toString(entry.getTotalScore());
+                    case "deaths":
+                        return Integer.toString(entry.fetchStatistics().getDeaths());
+                    case "destroyed_beds":
+                        return Integer.toString(entry.fetchStatistics().getDestroyedBeds());
+                    case "kills":
+                        return Integer.toString(entry.fetchStatistics().getKills());
+                    case "loses":
+                        return Integer.toString(entry.fetchStatistics().getLoses());
+                    case "wins":
+                        return Integer.toString(entry.fetchStatistics().getWins());
+                    case "games":
+                        return Integer.toString(entry.fetchStatistics().getGames());
+                    case "kd":
+                        return Double.toString(entry.fetchStatistics().getKD());
+                }
+            }
+        }
+
         // Player
         if (player == null) {
-            return "";
+            return null;
         }
 
         if (identifier.startsWith("current_")) {

plugin/src/main/java/org/screamingsandals/bedwars/statistics/PlayerStatisticManager.java

@@ -143,6 +143,15 @@ public List<LeaderboardEntry> getLeaderboard(int count) {
         return entries;
     }
 
+    public LeaderboardEntry getLeaderboardEntry(int index) {
+        return allScores.entrySet().stream()
+                .sorted((c1, c2) -> Comparator.<Integer>reverseOrder().compare(c1.getValue().getValue(), c2.getValue().getValue()))
+                .skip(index)
+                .findFirst()
+                .map(entry -> new org.screamingsandals.bedwars.statistics.LeaderboardEntry(Bukkit.getOfflinePlayer(entry.getKey()), entry.getValue().getValue(), entry.getValue().getKey()))
+                .orElse(null);
+    }
+
     private PlayerStatistic loadDatabaseStatistic(UUID uuid) {
         if (this.playerStatistic.containsKey(uuid)) {
             return this.playerStatistic.get(uuid);