BauSystem_Main/src/BauSystem.properties

@@ -655,8 +655,10 @@ INVENTORY_FILL_DISABLE = §cInventoryFiller deactivated
 KILLCHECKER_HELP_ENABLE = §8/§ekillchecker enable §8- §7Enables Killchecker / Recalculates kills
 KILLCHECKER_HELP_DISABLE = §8/§ekillchecker disable §8- §7Disables Killchecker
 KILLCHECKER_INFO = §7Shows the overlaps of cannon kills in your build area.
+KILLCHECKER_INFO2 = §7Only colorable blocks like Wool, Terractotta, Stained Glass and Concrete are counted.
 KILLCHECKER_ENABLE = §aKillchecker activated
 KILLCHECKER_DISABLE = §cKillchecker deactivated
+KILLCHECKER_BOSSBAR = §e§l{0} §7(§e{1}%§7)   §e§l{2}§7 cannons
 
 # BlockCounter
 BLOCK_COUNTER_HELP_TOGGLE = §8/§eblockcounter §8- §7Toggle on/off

BauSystem_Main/src/BauSystem_de.properties

@@ -628,8 +628,10 @@ INVENTORY_FILL_DISABLE = §cInventoryFiller deactivated
 KILLCHECKER_HELP_ENABLE = §8/§ekillchecker enable §8- §7Aktiviert Killchecker / Berechnet kills neu
 KILLCHECKER_HELP_DISABLE = §8/§ekillchecker disable §8- §7Deaktiviert Killchecker
 KILLCHECKER_INFO = §7Zeigt Überlappungen der Kanonen Kills im Baubereich an.
+KILLCHECKER_INFO2 = §7Nur farbige Blöcke wie Wolle, Terracotta, Stained Glass und Concrete wird gezählt.
 KILLCHECKER_ENABLE = §aKillchecker aktiviert
 KILLCHECKER_DISABLE = §cKillchecker deaktiviert
+KILLCHECKER_BOSSBAR = §e§l{0} §7(§e{1}%§7)   §e§l{2}§7 Kanonnen
 
 # BlockCounter
 BLOCK_COUNTER_HELP_TOGGLE = §8/§eblockcounter §8- §7Wechsel zwischen an und aus

BauSystem_Main/src/de/steamwar/bausystem/features/killchecker/Cuboid.java

@@ -0,0 +1,34 @@
+/*
+ * This file is a part of the SteamWar software.
+ *
+ * Copyright (C) 2023  SteamWar.de-Serverteam
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package de.steamwar.bausystem.features.killchecker;
+
+import lombok.AllArgsConstructor;
+import lombok.Data;
+
+@Data
+@AllArgsConstructor
+public class Cuboid {
+    private double x;
+    private double y;
+    private double z;
+    private double dx;
+    private double dy;
+    private double dz;
+}

BauSystem_Main/src/de/steamwar/bausystem/features/killchecker/KillcheckerCommand.java

@@ -21,8 +21,10 @@ package de.steamwar.bausystem.features.killchecker;
 
 import de.steamwar.bausystem.BauSystem;
 import de.steamwar.bausystem.region.Region;
+import de.steamwar.bausystem.utils.bossbar.BossBarService;
 import de.steamwar.command.SWCommand;
 import de.steamwar.linkage.Linked;
+import de.steamwar.linkage.LinkedInstance;
 import org.bukkit.Bukkit;
 import org.bukkit.block.Block;
 import org.bukkit.entity.Player;
@@ -42,17 +44,21 @@ public class KillcheckerCommand extends SWCommand implements Listener {
 
     private Map<Region, KillcheckerVisualizer> visualizers = new HashMap<>();
 
+    @LinkedInstance
+    public BossBarService bossBarService;
+
     public KillcheckerCommand() {
         super("killchecker");
         addDefaultHelpMessage("KILLCHECKER_INFO");
+        addDefaultHelpMessage("KILLCHECKER_INFO2");
     }
 
     @Register(value = "enable", description = "KILLCHECKER_HELP_ENABLE")
-    public void genericCommand(Player player) {
+    public void genericCommand(Player player, @OptionalValue("-outline") @StaticValue(value = {"-area", "-outline"}, allowISE = true) boolean onlyOutline) {
         Region region = Region.getRegion(player.getLocation());
-        KillcheckerVisualizer killcheckerVisualizer = visualizers.computeIfAbsent(region, KillcheckerVisualizer::new);
+        KillcheckerVisualizer killcheckerVisualizer = visualizers.computeIfAbsent(region, region1 -> new KillcheckerVisualizer(region1, bossBarService));
         killcheckerVisualizer.recalc();
-        killcheckerVisualizer.show(player);
+        killcheckerVisualizer.show(player, onlyOutline);
         BauSystem.MESSAGE.send("KILLCHECKER_ENABLE", player);
     }
 
@@ -73,7 +79,7 @@ public class KillcheckerCommand extends SWCommand implements Listener {
         Player player = event.getPlayer();
         Set<Region> regions = new HashSet<>();
         visualizers.forEach((region, visualizer) -> {
-            if (visualizer.hide(player)) {
+            if (visualizer.disconnect(player)) {
                 regions.add(region);
             }
         });

BauSystem_Main/src/de/steamwar/bausystem/features/killchecker/KillcheckerVisualizer.java

@@ -19,11 +19,13 @@
 
 package de.steamwar.bausystem.features.killchecker;
 
-import de.steamwar.bausystem.features.slaves.laufbau.Cuboid;
+import de.steamwar.bausystem.BauSystem;
 import de.steamwar.bausystem.region.Point;
 import de.steamwar.bausystem.region.Region;
 import de.steamwar.bausystem.region.utils.RegionExtensionType;
 import de.steamwar.bausystem.region.utils.RegionType;
+import de.steamwar.bausystem.utils.bossbar.BauSystemBossbar;
+import de.steamwar.bausystem.utils.bossbar.BossBarService;
 import de.steamwar.entity.REntity;
 import de.steamwar.entity.REntityServer;
 import de.steamwar.entity.RFallingBlockEntity;
@@ -31,6 +33,9 @@ import org.bukkit.Bukkit;
 import org.bukkit.Material;
 import org.bukkit.World;
 import org.bukkit.block.Block;
+import org.bukkit.boss.BarColor;
+import org.bukkit.boss.BarStyle;
+import org.bukkit.boss.BossBar;
 import org.bukkit.entity.Player;
 
 import java.util.HashMap;
@@ -40,33 +45,59 @@ import java.util.Set;
 
 public class KillcheckerVisualizer {
 
-    private static final Material[] materials = new Material[] {Material.YELLOW_STAINED_GLASS, Material.ORANGE_STAINED_GLASS, Material.RED_STAINED_GLASS, Material.PURPLE_STAINED_GLASS, Material.BLACK_STAINED_GLASS};
+    private static final Material[] MATERIALS = new Material[] {Material.YELLOW_STAINED_GLASS, Material.ORANGE_STAINED_GLASS, Material.RED_STAINED_GLASS, Material.PURPLE_STAINED_GLASS, Material.BLACK_STAINED_GLASS};
     private static final World WORLD = Bukkit.getWorlds().get(0);
     
-    private Point minPoint;
+    private static final double SURROUND = 4;
-    private Point maxPoint;
     
-    private Set<Player> players = new HashSet<>();
+    private final Point minPoint;
+    private final Point maxPoint;
 
-    public KillcheckerVisualizer(Region region) {
+    private final int yArea;
+    private final int zArea;
+    private final int xArea;
+
+    private final Set<Player> players = new HashSet<>();
+    private final Set<Player> areaPlayers = new HashSet<>();
+
+    private final Region region;
+    private final BossBarService bossBarService;
+
+    public KillcheckerVisualizer(Region region, BossBarService bossBarService) {
+        this.region = region;
         this.minPoint = region.getMinPoint(RegionType.BUILD, RegionExtensionType.NORMAL);
         this.maxPoint = region.getMaxPoint(RegionType.BUILD, RegionExtensionType.NORMAL);
+
+        yArea = (maxPoint.getX() - minPoint.getX()) * (maxPoint.getZ() - minPoint.getZ());
+        zArea = (maxPoint.getX() - minPoint.getX()) * (maxPoint.getY() - minPoint.getY());
+        xArea = (maxPoint.getY() - minPoint.getY()) * (maxPoint.getZ() - minPoint.getZ());
+
+        this.bossBarService = bossBarService;
     }
 
-    private REntityServer rEntityServer = new REntityServer();
+    private final REntityServer outline = new REntityServer();
+    private final REntityServer inner = new REntityServer();
 
-    private Map<Point, Integer> killCount = new HashMap<>();
+    private final Map<Point, Integer> killCount = new HashMap<>();
-    private Map<Point, REntity> rEntities = new HashMap<>();
+    private final Set<Point> outlinePointsCache = new HashSet<>();
+    private final Map<Point, REntity> rEntities = new HashMap<>();
+
+    private double percent = 0;
+    private int kills = 0;
+    private int cannonCount = 0;
 
     public void recalc() {
         Set<Cuboid> cuboids = new HashSet<>();
         Set<Point> points = new HashSet<>();
-        for (int x = minPoint.getX() + 1; x < maxPoint.getX() - 1; x++) {
+        for (int x = minPoint.getX() + 1; x < maxPoint.getX(); x++) {
             for (int y = minPoint.getY(); y < maxPoint.getY(); y++) {
-                for (int z = minPoint.getZ() + 1; z < maxPoint.getZ() - 1; z++) {
+                for (int z = minPoint.getZ() + 1; z < maxPoint.getZ(); z++) {
                     if (points.contains(new Point(x, y, z))) continue;
                     Block block = WORLD.getBlockAt(x, y, z);
                     if (block.getType().isAir()) continue;
+                    String name = block.getType().name();
+                    if (!name.endsWith("_WOOL") && !name.endsWith("_STAINED_GLASS") && !name.endsWith("_CONCRETE") && !name.endsWith("_TERRACOTTA")) continue;
+                    if (name.equals("_GLAZED_TERRACOTTA")) continue;
                     Cuboid cuboid = create(block.getType(), x, y, z);
                     cuboids.add(cuboid);
                     for (int dx = (int) cuboid.getX(); dx <= cuboid.getDx(); dx++) {
@@ -79,60 +110,162 @@ public class KillcheckerVisualizer {
                 }
             }
         }
+        cannonCount = cuboids.size();
 
         Map<Point, Integer> kill = new HashMap<>();
-        for (int x = minPoint.getX(); x < maxPoint.getX(); x++) {
+        int yKills = 0;
-            for (int z = minPoint.getZ(); z < maxPoint.getZ(); z++) {
+        int yCount = 0;
+        Set<Point> yPoints = new HashSet<>();
+        for (int x = minPoint.getX(); x <= maxPoint.getX(); x++) {
+            for (int z = minPoint.getZ(); z <= maxPoint.getZ(); z++) {
                 Set<Cuboid> cuboidSet = new HashSet<>();
                 for (Cuboid cuboid : cuboids) {
-                    if (x >= cuboid.getX() - 3.5 && x <= cuboid.getDx() + 3.5 && z >= cuboid.getZ() - 3.5 && z <= cuboid.getDz() + 3.5) {
+                    if (x >= cuboid.getX() - SURROUND && x < cuboid.getDx() + SURROUND && z >= cuboid.getZ() - SURROUND && z < cuboid.getDz() + SURROUND) {
                         cuboidSet.add(cuboid);
                     }
                 }
                 if (cuboidSet.size() > 1) {
-                    Point p1 = new Point(x, minPoint.getY(), z);
+                    yCount++;
-                    kill.put(p1, Math.max(kill.getOrDefault(p1, 0), cuboidSet.size()));
+                    yKills += splitIntoDoubleKills(cuboidSet.size());
-                    Point p2 = new Point(x, maxPoint.getY(), z);
+                    Point p2 = new Point(x, maxPoint.getY() + 1, z);
+                    yPoints.add(p2);
                     kill.put(p2, Math.max(kill.getOrDefault(p2, 0), cuboidSet.size()));
                 }
             }
         }
 
-        for (int y = minPoint.getY(); y < maxPoint.getY(); y++) {
+        int xKills = 0;
-            for (int z = minPoint.getZ(); z < maxPoint.getZ(); z++) {
+        int xCount = 0;
+        Set<Point> xPoints = new HashSet<>();
+        for (int y = minPoint.getY(); y <= maxPoint.getY(); y++) {
+            for (int z = minPoint.getZ(); z <= maxPoint.getZ(); z++) {
                 Set<Cuboid> cuboidSet = new HashSet<>();
                 for (Cuboid cuboid : cuboids) {
-                    if (y >= cuboid.getY() - 3.5 && y <= cuboid.getDy() + 3.5 && z >= cuboid.getZ() - 3.5 && z <= cuboid.getDz() + 3.5) {
+                    if (y >= cuboid.getY() - SURROUND && y < cuboid.getDy() + SURROUND && z >= cuboid.getZ() - SURROUND && z < cuboid.getDz() + SURROUND) {
                         cuboidSet.add(cuboid);
                     }
                 }
                 if (cuboidSet.size() > 1) {
-                    Point p1 = new Point(minPoint.getX(), y, z);
+                    xCount++;
+                    xKills += splitIntoDoubleKills(cuboidSet.size());
+                    Point p1 = new Point(minPoint.getX() - 1, y, z);
+                    xPoints.add(p1);
                     kill.put(p1, Math.max(kill.getOrDefault(p1, 0), cuboidSet.size()));
-                    Point p2 = new Point(maxPoint.getX(), y, z);
+                    Point p2 = new Point(maxPoint.getX() + 1, y, z);
+                    xPoints.add(p2);
                     kill.put(p2, Math.max(kill.getOrDefault(p2, 0), cuboidSet.size()));
                 }
             }
         }
 
-        for (int x = minPoint.getX(); x < maxPoint.getX(); x++) {
+        int zKills = 0;
-            for (int y = minPoint.getY(); y < maxPoint.getY(); y++) {
+        int zCount = 0;
+        Set<Point> zPoints = new HashSet<>();
+        for (int x = minPoint.getX(); x <= maxPoint.getX(); x++) {
+            for (int y = minPoint.getY(); y <= maxPoint.getY(); y++) {
                 Set<Cuboid> cuboidSet = new HashSet<>();
                 for (Cuboid cuboid : cuboids) {
-                    if (x >= cuboid.getX() - 3.5 && x <= cuboid.getDx() + 3.5 && y >= cuboid.getY() - 3.5 && y <= cuboid.getDy() + 3.5) {
+                    if (x >= cuboid.getX() - SURROUND && x < cuboid.getDx() + SURROUND && y >= cuboid.getY() - SURROUND && y < cuboid.getDy() + SURROUND) {
                         cuboidSet.add(cuboid);
                     }
                 }
                 if (cuboidSet.size() > 1) {
-                    Point p1 = new Point(x, y, minPoint.getZ());
+                    zCount++;
+                    zKills += splitIntoDoubleKills(cuboidSet.size());
+                    Point p1 = new Point(x, y, minPoint.getZ() - 1);
+                    zPoints.add(p1);
                     kill.put(p1, Math.max(kill.getOrDefault(p1, 0), cuboidSet.size()));
-                    Point p2 = new Point(x, y, maxPoint.getZ());
+                    Point p2 = new Point(x, y, maxPoint.getZ() + 1);
+                    zPoints.add(p2);
                     kill.put(p2, Math.max(kill.getOrDefault(p2, 0), cuboidSet.size()));
                 }
             }
         }
 
+        Set<Point> outlinePoints = new HashSet<>();
+        yPoints.forEach(point -> {
+            Point p1 = new Point(point.getX() - 1, point.getY(), point.getZ());
+            Point p2 = new Point(point.getX() + 1, point.getY(), point.getZ());
+            Point p3 = new Point(point.getX(), point.getY(), point.getZ() - 1);
+            Point p4 = new Point(point.getX(), point.getY(), point.getZ() + 1);
+
+            Point p5 = new Point(point.getX() - 1, point.getY(), point.getZ() - 1);
+            Point p6 = new Point(point.getX() - 1, point.getY(), point.getZ() + 1);
+            Point p7 = new Point(point.getX() + 1, point.getY(), point.getZ() - 1);
+            Point p8 = new Point(point.getX() + 1, point.getY(), point.getZ() + 1);
+
+            int count = kill.get(point);
+
+            int surrounded = 0;
+            if (kill.getOrDefault(p1, 0) == count) surrounded++;
+            if (kill.getOrDefault(p2, 0) == count) surrounded++;
+            if (kill.getOrDefault(p3, 0) == count) surrounded++;
+            if (kill.getOrDefault(p4, 0) == count) surrounded++;
+            if (surrounded != 4) outlinePoints.add(point);
+            if (kill.getOrDefault(p5, 0) != count) outlinePoints.add(point);
+            if (kill.getOrDefault(p6, 0) != count) outlinePoints.add(point);
+            if (kill.getOrDefault(p7, 0) != count) outlinePoints.add(point);
+            if (kill.getOrDefault(p8, 0) != count) outlinePoints.add(point);
+        });
+        xPoints.forEach(point -> {
+            Point p1 = new Point(point.getX(), point.getY() - 1, point.getZ());
+            Point p2 = new Point(point.getX(), point.getY() + 1, point.getZ());
+            Point p3 = new Point(point.getX(), point.getY(), point.getZ() - 1);
+            Point p4 = new Point(point.getX(), point.getY(), point.getZ() + 1);
+
+            Point p5 = new Point(point.getX(), point.getY() - 1, point.getZ() - 1);
+            Point p6 = new Point(point.getX(), point.getY() - 1, point.getZ() + 1);
+            Point p7 = new Point(point.getX(), point.getY() + 1, point.getZ() - 1);
+            Point p8 = new Point(point.getX(), point.getY() + 1, point.getZ() + 1);
+
+            int count = kill.get(point);
+
+            int surrounded = 0;
+            if (kill.getOrDefault(p1, 0) == count) surrounded++;
+            if (kill.getOrDefault(p2, 0) == count) surrounded++;
+            if (kill.getOrDefault(p3, 0) == count) surrounded++;
+            if (kill.getOrDefault(p4, 0) == count) surrounded++;
+            if (surrounded != 4) outlinePoints.add(point);
+            if (kill.getOrDefault(p5, 0) != count) outlinePoints.add(point);
+            if (kill.getOrDefault(p6, 0) != count) outlinePoints.add(point);
+            if (kill.getOrDefault(p7, 0) != count) outlinePoints.add(point);
+            if (kill.getOrDefault(p8, 0) != count) outlinePoints.add(point);
+        });
+        zPoints.forEach(point -> {
+            Point p1 = new Point(point.getX() - 1, point.getY(), point.getZ());
+            Point p2 = new Point(point.getX() + 1, point.getY(), point.getZ());
+            Point p3 = new Point(point.getX(), point.getY() - 1, point.getZ());
+            Point p4 = new Point(point.getX(), point.getY() + 1, point.getZ());
+
+            Point p5 = new Point(point.getX() - 1, point.getY() - 1, point.getZ());
+            Point p6 = new Point(point.getX() - 1, point.getY() + 1, point.getZ());
+            Point p7 = new Point(point.getX() + 1, point.getY() - 1, point.getZ());
+            Point p8 = new Point(point.getX() + 1, point.getY() + 1, point.getZ());
+
+            int count = kill.get(point);
+
+            int surrounded = 0;
+            if (kill.getOrDefault(p1, 0) == count) surrounded++;
+            if (kill.getOrDefault(p2, 0) == count) surrounded++;
+            if (kill.getOrDefault(p3, 0) == count) surrounded++;
+            if (kill.getOrDefault(p4, 0) == count) surrounded++;
+            if (surrounded != 4) outlinePoints.add(point);
+            if (kill.getOrDefault(p5, 0) != count) outlinePoints.add(point);
+            if (kill.getOrDefault(p6, 0) != count) outlinePoints.add(point);
+            if (kill.getOrDefault(p7, 0) != count) outlinePoints.add(point);
+            if (kill.getOrDefault(p8, 0) != count) outlinePoints.add(point);
+        });
+
+        double xPercent = zCount / (double) xArea;
+        double yPercent = yCount / (double) yArea;
+        double zPercent = xCount / (double) zArea;
+        percent = (xPercent + yPercent + zPercent) / 3;
+        kills = zKills + yKills + xKills;
+        players.forEach(this::updateBossBar);
+
         Set<Point> pointSet = new HashSet<>(killCount.keySet());
+        Set<Point> outlinePointsCacheLast = new HashSet<>(outlinePointsCache);
+        outlinePointsCache.clear();
         for (Point point : pointSet) {
             if (!kill.containsKey(point)) {
                 rEntities.get(point).die();
@@ -142,16 +275,37 @@ public class KillcheckerVisualizer {
         }
         kill.forEach((point, count) -> {
             if (rEntities.containsKey(point)) {
-                if (killCount.get(point) == count) return;
+                if (killCount.get(point) == count && outlinePoints.contains(point) == outlinePointsCacheLast.contains(point)) return;
                 rEntities.get(point).die();
             }
-            RFallingBlockEntity entity = new RFallingBlockEntity(rEntityServer, point.toLocation(WORLD, 0.5, 0, 0.5), materials[Math.min(count - 1, materials.length) - 1]);
+            RFallingBlockEntity entity = new RFallingBlockEntity(outlinePoints.contains(point) ? outline : inner, point.toLocation(WORLD, 0.5, 0, 0.5), MATERIALS[Math.min(count - 1, MATERIALS.length) - 1]);
             entity.setNoGravity(true);
             rEntities.put(point, entity);
+            if (outlinePoints.contains(point)) outlinePointsCache.add(point);
             killCount.put(point, count);
         });
     }
 
+    private int splitIntoDoubleKills(int kills) {
+        return kills * (kills - 1) / 2;
+    }
+
+    private void updateBossBar(Player player) {
+        BauSystemBossbar bossbar = bossBarService.get(player, region, "killchecker");
+        bossbar.setTitle(BauSystem.MESSAGE.parse("KILLCHECKER_BOSSBAR", player, kills, ((int) (percent * 1000) / 10.0), cannonCount));
+        bossbar.setProgress(percent);
+
+        if (percent >= 0.35) {
+            bossbar.setColor(BarColor.RED);
+        } else if (percent >= 0.25) {
+            bossbar.setColor(BarColor.PURPLE);
+        } else if (percent >= 0.15) {
+            bossbar.setColor(BarColor.YELLOW);
+        } else {
+            bossbar.setColor(BarColor.GREEN);
+        }
+    }
+
     private Cuboid create(Material type, int x, int y, int z) {
         Set<Point> checked = new HashSet<>();
         Set<Point> points = new HashSet<>();
@@ -202,16 +356,42 @@ public class KillcheckerVisualizer {
         return new Cuboid(minX, minY, minZ, maxX, maxY, maxZ);
     }
 
-    public boolean show(Player player) {
+    public boolean show(Player player, boolean onlyOutline) {
-        rEntityServer.addPlayer(player);
+        outline.addPlayer(player);
+        if (!onlyOutline) {
+            inner.addPlayer(player);
+            areaPlayers.add(player);
+        } else if (areaPlayers.contains(player)) {
+            inner.removePlayer(player);
+            areaPlayers.remove(player);
+        }
+        updateBossBar(player);
         return players.add(player);
     }
 
     public boolean hide(Player player) {
-        rEntityServer.removePlayer(player);
+        outline.removePlayer(player);
+        if (areaPlayers.contains(player)) {
+            inner.removePlayer(player);
+        }
         players.remove(player);
+        areaPlayers.remove(player);
+        bossBarService.remove(player, region, "killchecker");
         if (players.isEmpty()) {
-            rEntityServer.close();
+            outline.close();
+            inner.close();
+            return true;
+        }
+        return false;
+    }
+
+    public boolean disconnect(Player player) {
+        players.remove(player);
+        areaPlayers.remove(player);
+        bossBarService.remove(player, region, "killchecker");
+        if (players.isEmpty()) {
+            outline.close();
+            inner.close();
             return true;
         }
         return false;

BauSystem_Main/src/de/steamwar/bausystem/utils/bossbar/BauSystemBossbar.java

@@ -0,0 +1,51 @@
+/*
+ * This file is a part of the SteamWar software.
+ *
+ * Copyright (C) 2023  SteamWar.de-Serverteam
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package de.steamwar.bausystem.utils.bossbar;
+
+import de.steamwar.bausystem.region.Region;
+import org.bukkit.boss.BarColor;
+import org.bukkit.boss.BarFlag;
+import org.bukkit.boss.BarStyle;
+
+public interface BauSystemBossbar {
+
+    String getTitle();
+    void setTitle(String title);
+
+    double getProgress();
+    void setProgress(double progress);
+
+    BarColor getColor();
+    void setColor(BarColor color);
+
+    BarStyle getStyle();
+    void setStyle(BarStyle style);
+
+    boolean hasFlag(BarFlag flag);
+    void addFlag(BarFlag flag);
+    void removeFlag(BarFlag flag);
+
+    boolean isVisible();
+    void setVisible(boolean visible);
+
+    Region getRegion();
+
+    void cleanup();
+}

BauSystem_Main/src/de/steamwar/bausystem/utils/bossbar/BossBarService.java

@@ -0,0 +1,90 @@
+/*
+ * This file is a part of the SteamWar software.
+ *
+ * Copyright (C) 2023  SteamWar.de-Serverteam
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package de.steamwar.bausystem.utils.bossbar;
+
+import de.steamwar.bausystem.region.Region;
+import de.steamwar.linkage.Linked;
+import org.bukkit.Bukkit;
+import org.bukkit.boss.BarColor;
+import org.bukkit.boss.BarStyle;
+import org.bukkit.boss.BossBar;
+import org.bukkit.entity.Player;
+import org.bukkit.event.EventHandler;
+import org.bukkit.event.EventPriority;
+import org.bukkit.event.Listener;
+import org.bukkit.event.player.PlayerQuitEvent;
+
+import java.util.HashMap;
+import java.util.Map;
+
+@Linked
+public class BossBarService implements Listener {
+
+    private final Map<Player, Map<Region, Map<String, BauSystemBossbar>>> playerBossBars = new HashMap<>();
+
+    public synchronized BauSystemBossbar get(Player player, Region region, String key) {
+        return playerBossBars.computeIfAbsent(player, p -> new HashMap<>())
+                .computeIfAbsent(region, r -> new HashMap<>())
+                .computeIfAbsent(key, k -> {
+                    BossBar bossBar = Bukkit.createBossBar("", BarColor.WHITE, BarStyle.SOLID);
+                    bossBar.addPlayer(player);
+                    if (region.isGlobal()) {
+                        return new GlobalBossbar(bossBar);
+                    } else {
+                        return new RegionedBossbar(bossBar, region, player);
+                    }
+                });
+    }
+
+    public synchronized void removeAll(Player player, String key) {
+        Map<Region, Map<String, BauSystemBossbar>> regionMap = playerBossBars.get(player);
+        if (regionMap == null) return;
+        for (Map<String, BauSystemBossbar> bossBarMap : regionMap.values()) {
+            BauSystemBossbar bossBar = bossBarMap.remove(key);
+            if (bossBar == null) continue;
+            bossBar.cleanup();
+        }
+    }
+
+    public synchronized void removeAll(Player player) {
+        Map<Region, Map<String, BauSystemBossbar>> regionMap = playerBossBars.remove(player);
+        if (regionMap == null) return;
+        for (Map<String, BauSystemBossbar> bossBarMap : regionMap.values()) {
+            for (BauSystemBossbar bossBar : bossBarMap.values()) {
+                bossBar.cleanup();
+            }
+        }
+    }
+
+    public synchronized void remove(Player player, Region region, String key) {
+        Map<Region, Map<String, BauSystemBossbar>> regionMap = playerBossBars.get(player);
+        if (regionMap == null) return;
+        Map<String, BauSystemBossbar> bossBarMap = regionMap.get(region);
+        if (bossBarMap == null) return;
+        BauSystemBossbar bossBar = bossBarMap.remove(key);
+        if (bossBar == null) return;
+        bossBar.cleanup();
+    }
+
+    @EventHandler(ignoreCancelled = true, priority = EventPriority.MONITOR)
+    public void onPlayerQuit(PlayerQuitEvent event) {
+        removeAll(event.getPlayer());
+    }
+}

BauSystem_Main/src/de/steamwar/bausystem/utils/bossbar/GlobalBossbar.java

@@ -0,0 +1,112 @@
+/*
+ * This file is a part of the SteamWar software.
+ *
+ * Copyright (C) 2023  SteamWar.de-Serverteam
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package de.steamwar.bausystem.utils.bossbar;
+
+import de.steamwar.bausystem.region.GlobalRegion;
+import de.steamwar.bausystem.region.Region;
+import org.bukkit.boss.BarColor;
+import org.bukkit.boss.BarFlag;
+import org.bukkit.boss.BarStyle;
+import org.bukkit.boss.BossBar;
+
+public class GlobalBossbar implements BauSystemBossbar {
+
+    private BossBar bossBar;
+
+    public GlobalBossbar(BossBar bossBar) {
+        this.bossBar = bossBar;
+    }
+
+    @Override
+    public String getTitle() {
+        return bossBar.getTitle();
+    }
+
+    @Override
+    public void setTitle(String title) {
+        bossBar.setTitle(title);
+    }
+
+    @Override
+    public double getProgress() {
+        return bossBar.getProgress();
+    }
+
+    @Override
+    public void setProgress(double progress) {
+        bossBar.setProgress(progress);
+    }
+
+    @Override
+    public BarColor getColor() {
+        return bossBar.getColor();
+    }
+
+    @Override
+    public void setColor(BarColor color) {
+        bossBar.setColor(color);
+    }
+
+    @Override
+    public BarStyle getStyle() {
+        return bossBar.getStyle();
+    }
+
+    @Override
+    public void setStyle(BarStyle style) {
+        bossBar.setStyle(style);
+    }
+
+    @Override
+    public boolean hasFlag(BarFlag flag) {
+        return bossBar.hasFlag(flag);
+    }
+
+    @Override
+    public void addFlag(BarFlag flag) {
+        bossBar.addFlag(flag);
+    }
+
+    @Override
+    public void removeFlag(BarFlag flag) {
+        bossBar.removeFlag(flag);
+    }
+
+    @Override
+    public boolean isVisible() {
+        return bossBar.isVisible();
+    }
+
+    @Override
+    public void setVisible(boolean visible) {
+        bossBar.setVisible(visible);
+    }
+
+    @Override
+    public Region getRegion() {
+        return GlobalRegion.getInstance();
+    }
+
+    @Override
+    public void cleanup() {
+        bossBar.removeAll();
+        bossBar = null;
+    }
+}

BauSystem_Main/src/de/steamwar/bausystem/utils/bossbar/RegionedBossbar.java

@@ -0,0 +1,146 @@
+/*
+ * This file is a part of the SteamWar software.
+ *
+ * Copyright (C) 2023  SteamWar.de-Serverteam
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+package de.steamwar.bausystem.utils.bossbar;
+
+import de.steamwar.bausystem.BauSystem;
+import de.steamwar.bausystem.region.Region;
+import de.steamwar.bausystem.region.utils.RegionExtensionType;
+import de.steamwar.bausystem.region.utils.RegionType;
+import org.bukkit.Bukkit;
+import org.bukkit.boss.BarColor;
+import org.bukkit.boss.BarFlag;
+import org.bukkit.boss.BarStyle;
+import org.bukkit.boss.BossBar;
+import org.bukkit.entity.Player;
+import org.bukkit.event.EventHandler;
+import org.bukkit.event.Listener;
+import org.bukkit.event.player.PlayerMoveEvent;
+import org.bukkit.event.player.PlayerQuitEvent;
+
+public class RegionedBossbar implements BauSystemBossbar, Listener {
+
+    private BossBar bossBar;
+    private Region region;
+    private Player player;
+
+    public RegionedBossbar(BossBar bossBar, Region region, Player player) {
+        this.bossBar = bossBar;
+        this.region = region;
+        this.player = player;
+        Bukkit.getPluginManager().registerEvents(this, BauSystem.getInstance());
+    }
+
+    @Override
+    public String getTitle() {
+        return bossBar.getTitle();
+    }
+
+    @Override
+    public void setTitle(String title) {
+        bossBar.setTitle(title);
+    }
+
+    @Override
+    public double getProgress() {
+        return bossBar.getProgress();
+    }
+
+    @Override
+    public void setProgress(double progress) {
+        bossBar.setProgress(progress);
+    }
+
+    @Override
+    public BarColor getColor() {
+        return bossBar.getColor();
+    }
+
+    @Override
+    public void setColor(BarColor color) {
+        bossBar.setColor(color);
+    }
+
+    @Override
+    public BarStyle getStyle() {
+        return bossBar.getStyle();
+    }
+
+    @Override
+    public void setStyle(BarStyle style) {
+        bossBar.setStyle(style);
+    }
+
+    @Override
+    public boolean hasFlag(BarFlag flag) {
+        return bossBar.hasFlag(flag);
+    }
+
+    @Override
+    public void addFlag(BarFlag flag) {
+        bossBar.addFlag(flag);
+    }
+
+    @Override
+    public void removeFlag(BarFlag flag) {
+        bossBar.removeFlag(flag);
+    }
+
+    @Override
+    public boolean isVisible() {
+        return bossBar.isVisible();
+    }
+
+    @Override
+    public void setVisible(boolean visible) {
+        bossBar.setVisible(visible);
+    }
+
+    @Override
+    public Region getRegion() {
+        return region;
+    }
+
+    @EventHandler
+    public void onPlayerMove(PlayerMoveEvent event) {
+        if (event.getPlayer() != player) return;
+        if (region.inRegion(event.getTo(), RegionType.NORMAL, RegionExtensionType.NORMAL)) {
+            bossBar.addPlayer(player);
+        } else {
+            bossBar.removePlayer(player);
+        }
+    }
+
+    @EventHandler
+    public void onPlayerQuit(PlayerQuitEvent event) {
+        if (event.getPlayer() != player) return;
+        cleanup();
+    }
+
+    @Override
+    public void cleanup() {
+        bossBar.removeAll();
+        bossBar = null;
+        region = null;
+        player = null;
+
+        PlayerMoveEvent.getHandlerList().unregister(this);
+        PlayerQuitEvent.getHandlerList().unregister(this);
+    }
+}