Boss bar colors now work in Bedrock 1.18!!

core/src/main/java/org/geysermc/geyser/session/cache/BossBar.java

@@ -42,7 +42,7 @@ public class BossBar {
     private final long entityId;
     private Component title;
     private float health;
-    private final int color;
+    private int color;
     private final int overlay;
     private final int darkenSky;
 
@@ -86,6 +86,16 @@ public class BossBar {
         session.sendUpstreamPacket(bossEventPacket);
     }
 
+    public void updateColor(int color) {
+        this.color = color;
+        BossEventPacket bossEventPacket = new BossEventPacket();
+        bossEventPacket.setBossUniqueEntityId(entityId);
+        bossEventPacket.setAction(BossEventPacket.Action.UPDATE_STYLE);
+        bossEventPacket.setColor(color);
+
+        session.sendUpstreamPacket(bossEventPacket);
+    }
+
     public void removeBossBar() {
         BossEventPacket bossEventPacket = new BossEventPacket();
         bossEventPacket.setBossUniqueEntityId(entityId);

core/src/main/java/org/geysermc/geyser/translator/protocol/bedrock/BedrockSetLocalPlayerAsInitializedTranslator.java

@@ -46,6 +46,10 @@ public class BedrockSetLocalPlayerAsInitializedTranslator extends PacketTranslat
                     }
                     // else we were able to log the user in
                 }
+                if (session.isLoggedIn()) {
+                    // Sigh
+                    session.getEntityCache().updateBossBars();
+                }
             }
         }
     }

core/src/main/java/org/geysermc/geyser/translator/protocol/java/JavaBossEventTranslator.java

@@ -41,7 +41,7 @@ public class JavaBossEventTranslator extends PacketTranslator<ClientboundBossEve
         switch (packet.getAction()) {
             case ADD:
                 long entityId = session.getEntityCache().getNextEntityId().incrementAndGet();
-                bossBar = new BossBar(session, entityId, packet.getTitle(), packet.getHealth(), 0, 1, 0);
+                bossBar = new BossBar(session, entityId, packet.getTitle(), packet.getHealth(), packet.getColor().ordinal(), 1, 0);
                 session.getEntityCache().addBossBar(packet.getUuid(), bossBar);
                 break;
             case UPDATE_TITLE:
@@ -54,6 +54,8 @@ public class JavaBossEventTranslator extends PacketTranslator<ClientboundBossEve
                 session.getEntityCache().removeBossBar(packet.getUuid());
                 break;
             case UPDATE_STYLE:
+                if (bossBar != null) bossBar.updateColor(packet.getColor().ordinal());
+                break;
             case UPDATE_FLAGS:
                 //todo
         }