Make ProtocolLib optional.

src/net/spoothie/chairs/ChairWatcher.java

@@ -0,0 +1,30 @@
+/*
+ * To change this template, choose Tools | Templates
+ * and open the template in the editor.
+ */
+package net.spoothie.chairs;
+
+import java.util.ArrayList;
+import net.minecraft.server.v1_5_R3.DataWatcher;
+import net.minecraft.server.v1_5_R3.WatchableObject;
+
+/**
+ *
+ * @author cnaude
+ */
+public class ChairWatcher extends DataWatcher {
+
+    private byte metadata;
+
+    public ChairWatcher(byte i) {
+        this.metadata = i;
+    }
+
+    @Override
+    public ArrayList<WatchableObject> b() {
+        ArrayList<WatchableObject> list = new ArrayList<WatchableObject>();
+        WatchableObject wo = new WatchableObject(0, 0, Byte.valueOf(this.metadata));
+        list.add(wo);
+        return list;
+    }
+}

src/net/spoothie/chairs/Chairs.java

@@ -10,15 +10,16 @@ import java.util.HashMap;
 import java.util.List;
 import java.util.logging.Level;
 import java.util.logging.Logger;
+import net.minecraft.server.v1_5_R3.Packet40EntityMetadata;
 import org.bukkit.Bukkit;
 import org.bukkit.ChatColor;
 import org.bukkit.Location;
 import org.bukkit.Material;
+import org.bukkit.craftbukkit.v1_5_R3.entity.CraftPlayer;
 import org.bukkit.entity.Player;
 import org.bukkit.event.player.PlayerTeleportEvent;
 import org.bukkit.permissions.Permission;
 import org.bukkit.permissions.PermissionDefault;
-import org.bukkit.plugin.Plugin;
 import org.bukkit.plugin.PluginManager;
 import org.bukkit.plugin.java.JavaPlugin;
 
@@ -49,11 +50,6 @@ public class Chairs extends JavaPlugin {
 
     @Override
     public void onEnable() {
-        if (!checkForProtocolLib()) {
-            logError("This plugin requires ProtocolLib. Please download the latest: http://dev.bukkit.org/server-mods/protocollib/");
-            Bukkit.getServer().getPluginManager().disablePlugin(this);
-            return;
-        } 
         instance = this;
         ignoreList = new ChairsIgnoreList();
         ignoreList.load();
@@ -70,7 +66,12 @@ public class Chairs extends JavaPlugin {
             logInfo("Enabling sitting effects.");
             chairEffects = new ChairEffects(this);
         }
-        protocolManager = ProtocolLibrary.getProtocolManager();
+        if (isProtocolLibLoaded()) {
+            logInfo("ProtocolLib detected.");
+            protocolManager = ProtocolLibrary.getProtocolManager();
+        } else {
+            logInfo("ProtocolLib not detected. Using NMS code methods instead.");
+        }
     }
 
     @Override
@@ -114,6 +115,10 @@ public class Chairs extends JavaPlugin {
         }
     }
     
+    public boolean isProtocolLibLoaded() {
+        return (getServer().getPluginManager().getPlugin("ProtocolLib") != null);
+    }
+
     public void loadConfig() {       
         autoRotate = getConfig().getBoolean("auto-rotate");
         sneaking = getConfig().getBoolean("sneaking");
@@ -228,7 +233,12 @@ public class Chairs extends JavaPlugin {
     
     // Send sit packet to all online players that are on same world and can see player
     public void sendSit(Player p) {              
-        sendPacketToPlayers(getSitPacket(p),p);
+        if (protocolManager != null) {
+            sendPacketToPlayers(getSitPacket(p),p);
+        } else {
+            Packet40EntityMetadata packet = new Packet40EntityMetadata(p.getPlayer().getEntityId(), new ChairWatcher((byte) 4), false);
+            sendPacketToPlayers(packet,p);
+        }
     }        
     
     private void sendPacketToPlayers(PacketContainer pc, Player p) {
@@ -245,6 +255,20 @@ public class Chairs extends JavaPlugin {
         }
     }
     
+    private void sendPacketToPlayers(Packet40EntityMetadata packet, Player p) {
+        for (Player onlinePlayer : Bukkit.getOnlinePlayers()) {
+            if (onlinePlayer.canSee(p)) {
+                if (onlinePlayer.getWorld().equals(p.getWorld())) {
+                    try {         
+                        ((CraftPlayer) p).getHandle().playerConnection.sendPacket(packet);
+                    } catch (Exception ex) {
+                        // Nothing here
+                    }
+                }
+            }
+        }
+    }
+    
     public void sendSit() {
         for (String s : sit.keySet()) {            
             Player p = Bukkit.getPlayer(s);
@@ -262,7 +286,12 @@ public class Chairs extends JavaPlugin {
             }
             sit.remove(p.getName());
         }   
-        sendPacketToPlayers(getStandPacket(p),p);
+        if (protocolManager != null) {
+            sendPacketToPlayers(getStandPacket(p),p);
+        } else {
+            Packet40EntityMetadata packet = new Packet40EntityMetadata(p.getPlayer().getEntityId(), new ChairWatcher((byte) 0), false);
+            sendPacketToPlayers(packet,p);
+        }
     }
     
     public void logInfo(String _message) {
@@ -277,13 +306,4 @@ public class Chairs extends JavaPlugin {
         return instance;
     }
         
-    public boolean checkForProtocolLib() {
-        Plugin plugin = getServer().getPluginManager().getPlugin("ProtocolLib");
-        if (plugin == null) {
-            return false;
-        } else {
-            return true;
-        }
-    }
-    
 }

src/plugin.yml

@@ -1,10 +1,12 @@
 name: Chairs
-version: 2.0.3
+version: 2.1.3
 description: Let players sit on blocks.
 authors: 
  - spoothie
  - cnaude
 main: net.spoothie.chairs.Chairs
+softdepend:
+- ProtocolLib
 commands:
     chairs:
         description: Various commands for Chairs.