Added Macros prevention

src/net/crystalyx/bukkit/simplyperms/SimplyPrevents.java

@@ -30,6 +30,7 @@ public abstract class SimplyPrevents implements Listener {
 		"chat.Chat",
 		"chat.CapsLock",
 		"chat.Flood",
+		"chat.Macros",
 		"craft.Brew",
 		"craft.Chest",
 		"craft.Dispenser",

src/net/crystalyx/bukkit/simplyperms/preventions/chat/Macros.java

@@ -0,0 +1,45 @@
+package net.crystalyx.bukkit.simplyperms.preventions.chat;
+
+import java.util.HashMap;
+
+import org.bukkit.entity.Player;
+import org.bukkit.event.EventHandler;
+import org.bukkit.event.EventPriority;
+import org.bukkit.event.player.PlayerCommandPreprocessEvent;
+
+import net.crystalyx.bukkit.simplyperms.SimplyPlugin;
+import net.crystalyx.bukkit.simplyperms.SimplyPrevents;
+
+public class Macros extends SimplyPrevents {
+
+	private HashMap<Player, Long> commandsTimestamps = new HashMap<Player, Long>();
+
+	public Macros(SimplyPlugin plugin) {
+		super(plugin);
+	}
+
+	@EventHandler(priority = EventPriority.LOW)
+	public void chat(PlayerCommandPreprocessEvent event) {
+		Player player = event.getPlayer();
+		if (isChatLocked(player)) {
+			prevent(event, player, "macros,spam");
+		} else {
+			setChatLock(player);
+		}
+	}
+
+	private void setChatLock(Player player) {
+		commandsTimestamps.put(player, Long.valueOf(System.currentTimeMillis() + 2000));
+	}
+
+	private boolean isChatLocked(Player player) {
+		Long nextPossible = commandsTimestamps.get(player);
+		if (nextPossible == null) {
+			return false;
+		}
+
+		long currentTime = System.currentTimeMillis();
+		return nextPossible.longValue() >= currentTime;
+	}
+
+}