Add ActionBarHandler

src/main/java/me/waterarchery/litlibs/handlers/ActionBarHandler.java

@@ -0,0 +1,77 @@
+package me.waterarchery.litlibs.handlers;
+
+import me.waterarchery.litlibs.LitLibs;
+import me.waterarchery.litlibs.utils.ChatUtils;
+import me.waterarchery.litlibs.version.Version;
+import me.waterarchery.litlibs.version.VersionHandler;
+import net.md_5.bungee.api.ChatMessageType;
+import net.md_5.bungee.api.chat.TextComponent;
+import org.bukkit.Bukkit;
+import org.bukkit.entity.Player;
+
+import java.lang.reflect.Constructor;
+
+public class ActionBarHandler {
+
+    private final LitLibs litLibs;
+
+    public ActionBarHandler(LitLibs litLibs) {
+        this.litLibs = litLibs;
+    }
+
+    public void sendActionBar(Player player, String message) {
+        if (player == null || message == null) {
+            return;
+        }
+
+        String coloredMessage = ChatUtils.colorizeLegacy(message);
+        VersionHandler versionHandler = VersionHandler.getInstance();
+
+        if (versionHandler.isServerNewerThan(Version.v1_11)) {
+            try {
+                player.spigot().sendMessage(ChatMessageType.ACTION_BAR, new TextComponent(coloredMessage));
+            } catch (Exception ex) {
+                sendLegacyActionBar(player, coloredMessage);
+            }
+        } else {
+            sendLegacyActionBar(player, coloredMessage);
+        }
+    }
+
+    private void sendLegacyActionBar(Player player, String message) {
+        try {
+            Object chatComponent = getNMSClass("IChatBaseComponent").getDeclaredClasses()[0]
+                    .getMethod("a", String.class)
+                    .invoke(null, "{\"text\": \"" + message + "\"}");
+
+            Constructor<?> packetConstructor = getNMSClass("PacketPlayOutChat")
+                    .getConstructor(getNMSClass("IChatBaseComponent"), byte.class);
+
+            Object packet = packetConstructor.newInstance(chatComponent, (byte) 2);
+            sendPacket(player, packet);
+        } catch (Exception ex) {
+            litLibs.getLogger().error(ex.getMessage());
+        }
+    }
+
+    private void sendPacket(Player player, Object packet) {
+        try {
+            Object handle = player.getClass().getMethod("getHandle").invoke(player);
+            Object playerConnection = handle.getClass().getField("playerConnection").get(handle);
+            playerConnection.getClass().getMethod("sendPacket", getNMSClass("Packet")).invoke(playerConnection, packet);
+        } catch (Exception ex) {
+            litLibs.getLogger().error(ex.getMessage());
+        }
+    }
+
+    private Class<?> getNMSClass(String name) {
+        try {
+            return Class.forName("net.minecraft.server" + Bukkit.getServer().getClass().getPackage().getName().split("\\.")[3] + "." + name);
+        } catch (ClassNotFoundException ex) {
+            litLibs.getLogger().error(ex.getMessage());
+        }
+        return null;
+    }
+
+}
+