Added health bar display in action bar when in range.

plugin-modules/Core/resources-json/bosses.json

@@ -5,6 +5,10 @@
     "editing": true,
     "buyable": true,
     "price": 500000.0,
+    "healthBar": {
+      "radius": 50,
+      "text": "&6&lSkeleton King &8&m  &r &a%currentHealth%&7/&2%maxHealth%"
+    },
     "entityStats": [
       {
         "mainStats": {

plugin-modules/Core/src/com/songoda/epicbosses/EpicBosses.java

@@ -58,6 +58,7 @@ public class EpicBosses extends SongodaPlugin implements IReloadable {
     private BossSkillManager bossSkillManager;
     private BossTauntManager bossTauntManager;
     private BossHookManager bossHookManager;
+    private BossHealthBarManager bossHealthBarManager;
 
     private AutoSpawnManager autoSpawnManager;
 
@@ -119,6 +120,7 @@ public class EpicBosses extends SongodaPlugin implements IReloadable {
         this.bossSkillManager = new BossSkillManager(this);
         this.bossHookManager = new BossHookManager(this);
         this.bossTauntManager = new BossTauntManager(this);
+        this.bossHealthBarManager = new BossHealthBarManager(this);
         this.bossTargetManager = new BossTargetManager(this);
         this.bossEntityContainer = new BossEntityContainer();
         this.minionEntityContainer = new MinionEntityContainer();
@@ -317,6 +319,10 @@ public class EpicBosses extends SongodaPlugin implements IReloadable {
         return this.bossEntityContainer;
     }
 
+    public BossHealthBarManager getBossHealthBarManager() {
+        return bossHealthBarManager;
+    }
+
     public BossMechanicManager getBossMechanicManager() {
         return this.bossMechanicManager;
     }

plugin-modules/Core/src/com/songoda/epicbosses/entity/BossEntity.java

@@ -24,19 +24,22 @@ public class BossEntity {
     @Expose
     private final DropsElement drops;
     @Expose
+    private final HealthBarElement healthBar;
+    @Expose
     private String spawnItem, targeting;
     @Expose
     private boolean editing, buyable;
     @Expose
     private Double price;
 
-    public BossEntity(boolean editing, String spawnItem, String targeting, boolean buyable, Double price, List<EntityStatsElement> entityStats, SkillsElement skills, DropsElement drops, MessagesElement messages, CommandsElement commands) {
+    public BossEntity(boolean editing, String spawnItem, String targeting, boolean buyable, Double price, List<EntityStatsElement> entityStats, SkillsElement skills, DropsElement drops, MessagesElement messages, CommandsElement commands, HealthBarElement healthBar) {
         this.editing = editing;
         this.entityStats = entityStats;
         this.targeting = targeting;
         this.spawnItem = spawnItem;
         this.skills = skills;
         this.drops = drops;
+        this.healthBar = healthBar;
         this.messages = messages;
         this.commands = commands;
         this.buyable = buyable;
@@ -164,4 +167,8 @@ public class BossEntity {
     public DropsElement getDrops() {
         return this.drops;
     }
+
+    public HealthBarElement getHealthBar() {
+        return healthBar;
+    }
 }

plugin-modules/Core/src/com/songoda/epicbosses/entity/elements/HealthBarElement.java

@@ -0,0 +1,33 @@
+package com.songoda.epicbosses.entity.elements;
+
+import com.google.gson.annotations.Expose;
+
+public class HealthBarElement {
+
+    @Expose
+    private String text;
+
+    @Expose
+    private Integer radius;
+
+    public HealthBarElement(String text, Integer radius) {
+        this.text = text;
+        this.radius = radius;
+    }
+
+    public String getText() {
+        return text;
+    }
+
+    public void setText(String text) {
+        this.text = text;
+    }
+
+    public Integer getRadius() {
+        return radius;
+    }
+
+    public void setRadius(Integer radius) {
+        this.radius = radius;
+    }
+}

plugin-modules/Core/src/com/songoda/epicbosses/listeners/pre/BossSpawnListener.java

@@ -8,6 +8,7 @@ import com.songoda.epicbosses.events.PreBossSpawnEvent;
 import com.songoda.epicbosses.events.PreBossSpawnItemEvent;
 import com.songoda.epicbosses.holder.ActiveBossHolder;
 import com.songoda.epicbosses.managers.BossEntityManager;
+import com.songoda.epicbosses.managers.BossHealthBarManager;
 import com.songoda.epicbosses.managers.BossLocationManager;
 import com.songoda.epicbosses.managers.BossTauntManager;
 import com.songoda.epicbosses.utils.*;
@@ -38,11 +39,13 @@ public class BossSpawnListener implements Listener {
     private BossLocationManager bossLocationManager;
     private BossEntityManager bossEntityManager;
     private BossTauntManager bossTauntManager;
+    private BossHealthBarManager bossHealthBarManager;
 
     public BossSpawnListener(EpicBosses epicBosses) {
         this.bossTauntManager = epicBosses.getBossTauntManager();
         this.bossEntityManager = epicBosses.getBossEntityManager();
         this.bossLocationManager = epicBosses.getBossLocationManager();
+        this.bossHealthBarManager = epicBosses.getBossHealthBarManager();
     }
 
     @EventHandler
@@ -120,6 +123,7 @@ public class BossSpawnListener implements Listener {
         List<String> commands = new ArrayList(this.bossEntityManager.getOnSpawnCommands(bossEntity));
         List<String> messages = new ArrayList(this.bossEntityManager.getOnSpawnMessage(bossEntity));
         int messageRadius = this.bossEntityManager.getOnSpawnMessageRadius(bossEntity);
+
         ServerUtils serverUtils = ServerUtils.get();
 
         if (event instanceof PreBossSpawnItemEvent) {
@@ -155,6 +159,9 @@ public class BossSpawnListener implements Listener {
             MessageUtils.get().sendMessage(location, NumberUtils.get().getSquared(messageRadius), messages);
         }
 
+        // Health bar in action bar ;)
+        this.bossHealthBarManager.handleHealthBar(activeBossHolder);
+
         activeBossHolder.getTargetHandler().runTargetCycle();
         this.bossTauntManager.handleTauntSystem(activeBossHolder);
 
@@ -162,5 +169,4 @@ public class BossSpawnListener implements Listener {
 
         ServerUtils.get().callEvent(bossSpawnEvent);
     }
-
-}
+}

plugin-modules/Core/src/com/songoda/epicbosses/managers/BossHealthBarManager.java

@@ -0,0 +1,57 @@
+package com.songoda.epicbosses.managers;
+
+import com.songoda.core.compatibility.ServerVersion;
+import com.songoda.epicbosses.EpicBosses;
+import com.songoda.epicbosses.entity.elements.HealthBarElement;
+import com.songoda.epicbosses.holder.ActiveBossHolder;
+import com.songoda.epicbosses.utils.MessageUtils;
+import com.songoda.epicbosses.utils.NumberUtils;
+import org.bukkit.attribute.Attribute;
+import org.bukkit.entity.LivingEntity;
+import org.bukkit.scheduler.BukkitRunnable;
+
+public class BossHealthBarManager {
+
+    private final EpicBosses epicBosses;
+
+    public BossHealthBarManager(EpicBosses epicBosses) {
+        this.epicBosses = epicBosses;
+    }
+
+    public void handleHealthBar(ActiveBossHolder activeBossHolder) {
+        if (activeBossHolder.getBossEntity().getHealthBar() == null || activeBossHolder.getBossEntity().getHealthBar().getText() == null)
+            return;
+
+        createNewRunnable(activeBossHolder);
+    }
+
+    public void createNewRunnable(ActiveBossHolder activeBossHolder) {
+        HealthBarElement healthBarElement = activeBossHolder.getBossEntity().getHealthBar();
+
+        new BukkitRunnable() {
+            @Override
+            public void run() {
+                if (activeBossHolder.isDead()) {
+                    cancel();
+                    return;
+                }
+
+                if (activeBossHolder.getLivingEntity() == null) return;
+
+                // Parse placeholders
+                String formattedText = healthBarElement.getText().replaceAll("(?i)%currenthealth%", String.valueOf(NumberUtils.get().formatDouble(activeBossHolder.getLivingEntity().getHealth())))
+                        .replaceAll("(?i)%maxhealth%", String.valueOf(NumberUtils.get().formatDouble(getMaxHealth(activeBossHolder.getLivingEntity()))));
+
+                MessageUtils.get().sendActionBar(activeBossHolder.getLocation(), NumberUtils.get().getSquared(healthBarElement.getRadius()), formattedText);
+            }
+        }.runTaskTimer(epicBosses, 10, 20);
+    }
+
+    private double getMaxHealth(LivingEntity entity) {
+        if (ServerVersion.isServerVersionAbove(ServerVersion.V1_8)) {
+            return entity.getAttribute(Attribute.GENERIC_MAX_HEALTH).getValue();
+        } else {
+            return entity.getMaxHealth();
+        }
+    }
+}

plugin-modules/Core/src/com/songoda/epicbosses/utils/MessageUtils.java

@@ -1,9 +1,16 @@
 package com.songoda.epicbosses.utils;
 
+import com.songoda.core.compatibility.ServerVersion;
+import com.songoda.core.utils.NMSUtils;
+import net.md_5.bungee.api.ChatMessageType;
+import net.md_5.bungee.api.chat.TextComponent;
 import org.bukkit.Bukkit;
+import org.bukkit.ChatColor;
 import org.bukkit.Location;
 import org.bukkit.entity.LivingEntity;
+import org.bukkit.entity.Player;
 
+import java.lang.reflect.Method;
 import java.util.Arrays;
 import java.util.List;
 
@@ -42,10 +49,52 @@ public class MessageUtils {
         } else {
             Bukkit.getOnlinePlayers().forEach(player -> {
                 if ((player.getWorld().equals(center.getWorld())) && (player.getLocation().distanceSquared(center) <= radius)) {
-                    messages.forEach(string -> player.sendMessage(string));
+                    messages.forEach(player::sendMessage);
                 }
             });
         }
     }
 
-}
+    public void sendActionBar(Location center, int radius, String message) {
+        if (radius == -1) {
+            if (center.getWorld() == null) return;
+            center.getWorld().getPlayers().forEach(p -> sendActionBar(p, message));
+        } else {
+            Bukkit.getOnlinePlayers().forEach(player -> {
+                if ((player.getWorld().equals(center.getWorld())) && (player.getLocation().distanceSquared(center) <= radius)) {
+                    sendActionBar(player, message);
+                }
+            });
+        }
+    }
+
+    private Class<?> clazzPacketPlayOutChat, clazzChatSerializer, clazzIChatBaseComponent;
+    private Method methodA;
+
+    public void sendActionBar(Player player, String message) {
+        message = ChatColor.translateAlternateColorCodes('&', message);
+
+        if (ServerVersion.isServerVersionAbove(ServerVersion.V1_8)) {
+            player.spigot().sendMessage(ChatMessageType.ACTION_BAR, new TextComponent(message));
+        } else {
+            try {
+                // Cache nms
+                if (clazzPacketPlayOutChat == null) {
+                    clazzPacketPlayOutChat = NMSUtils.getNMSClass("PacketPlayOutChat");
+
+                    clazzChatSerializer = NMSUtils.getNMSClass("IChatBaseComponent$ChatSerializer");
+                    clazzIChatBaseComponent = NMSUtils.getNMSClass("IChatBaseComponent");
+
+                    methodA = clazzChatSerializer.getDeclaredMethod("a", String.class);
+                }
+
+                Object chatBaseComponent = clazzIChatBaseComponent.cast(methodA.invoke(clazzChatSerializer, "{\"text\": \"" + message + "\"}"));
+                Object packetPlayOutChat = clazzPacketPlayOutChat.getConstructor(new Class<?>[]{clazzIChatBaseComponent, byte.class}).newInstance(chatBaseComponent, (byte) 2);
+
+                NMSUtils.sendPacket(player, packetPlayOutChat);
+            } catch (Exception e) {
+                e.printStackTrace();
+            }
+        }
+    }
+}