Adding new config setting login-attack-delay. Set this in seconds for a delay before players can attack each other after logging on.

Use permission "essentials.pvpdelay.exempt" to bypass this restriction

Essentials/src/com/earth2me/essentials/EssentialsEntityListener.java

@@ -9,8 +9,8 @@ import org.bukkit.entity.Player;
 import org.bukkit.event.EventHandler;
 import org.bukkit.event.EventPriority;
 import org.bukkit.event.Listener;
-import org.bukkit.event.entity.EntityRegainHealthEvent.RegainReason;
 import org.bukkit.event.entity.*;
+import org.bukkit.event.entity.EntityRegainHealthEvent.RegainReason;
 import org.bukkit.inventory.ItemStack;
 
 
@@ -32,10 +32,18 @@ public class EssentialsEntityListener implements Listener
 		{
 			final User defender = ess.getUser(eDefend);
 			final User attacker = ess.getUser(eAttack);
+			
+			if (!attacker.isAuthorized("essentials.pvpdelay.exempt") &&
+				System.currentTimeMillis() < (attacker.getLastLogin() + ess.getSettings().getLoginAttackDelay()))
+			{
+				event.setCancelled(true);
+			}
+			
 			if (attacker.hasInvulnerabilityAfterTeleport() || defender.hasInvulnerabilityAfterTeleport())
 			{
 				event.setCancelled(true);
 			}
+			
 			attacker.updateActivity(true);
 			final List<String> commandList = attacker.getPowertool(attacker.getItemInHand());
 			if (commandList != null && !commandList.isEmpty())

Essentials/src/com/earth2me/essentials/ISettings.java

@@ -175,4 +175,6 @@ public interface ISettings extends IConf
 	long getTeleportInvulnerability();
 
 	boolean isTeleportInvulnerability();
+	
+	long getLoginAttackDelay();
 }

Essentials/src/com/earth2me/essentials/Settings.java

@@ -798,4 +798,16 @@ public class Settings implements ISettings
 	{
 		return teleportInvulnerability;
 	}
+	
+	private long _loginAttackDelay()
+	{
+		return config.getLong("login-attack-delay", 0) * 1000;
+	}
+	
+	@Override
+	public long getLoginAttackDelay()
+	{
+		return _loginAttackDelay();
+	}
+	
 }

Essentials/src/config.yml

@@ -308,6 +308,9 @@ repair-enchanted: true
 #If you set this to true any plugin that uses teleport will have the previous location registered.
 register-back-in-listener: false
 
+#Delay to wait before people can cause attack damage after logging in 
+login-attack-delay: 0
+
 ############################################################
 # +------------------------------------------------------+ #
 # |                   EssentialsHome                     | #