PermissionManager.java

package fr.Alphart.BAT.Modules.Core;

import net.md_5.bungee.api.CommandSender;
import net.md_5.bungee.api.ProxyServer;
import net.md_5.bungee.api.connection.ProxiedPlayer;
import fr.Alphart.BAT.Modules.IModule;

public class PermissionManager {
	private static final String permPrefix = "bat.";

	public static enum Action {
		BAN("ban"), BANIP("banip"), TEMPBAN("tempban"), TEMPBANIP("tempbanip"), UNBAN("unban"), UNBANIP("unbanip"), banBroadcast(
				"ban.broadcast"),

		MUTE("mute"), MUTEIP("muteip"), TEMPMUTE("tempmute"), TEMPMUTEIP("tempmuteip"), UNMUTE("unmute"), UNMUTEIP(
				"unmuteip"), MUTE_BROADCAST("mute.broadcast"),

		KICK("kick"), WARN("warn"), WARN_BROADCAST("warn.broadcast"), KICK_BROADCAST("kick.broadcast"),
		
		LOOKUP("lookup");

		String permission;

		Action(final String permission) {
			this.permission = permission;
		}

		public String getPermission() {
			return permPrefix + permission;
		}

		@Override
		public String toString() {
			return getPermission();
		}
		
		public String getText() {
		    	return this.permission;
		}
		
		public static Action fromText(String text) {
		    	if (text != null) {
		    	    	for (Action b : Action.values()) {
		    	    	    	if (text.equalsIgnoreCase(b.permission)) {
		    	    	    	    	return b;
		    	    	    	}
		    	    	}
		      }
		      return null;
		}
		
	}

	/**
	 * Check if the command sender can exec this action on this server
	 * 
	 * @param action
	 * @param executor
	 * @param server
	 * @return true if he can otherwise false
	 */
	public static boolean canExecuteAction(final Action action, final CommandSender executor, final String server) {
		if(executor.hasPermission("bat.admin") || executor.hasPermission(permPrefix + "grantall.global")){
			return true;
		}
		// If the user has global perm, check if he has some perm which negates this
		if(executor.hasPermission(permPrefix + "grantall." + server) ||  
			((executor.hasPermission(action.getPermission() + ".global") && // If it's for global server (or any which is the same, don't need to check the permission)
					!(server.equals(IModule.GLOBAL_SERVER) || server.equals(IModule.ANY_SERVER))))){
			
			final String denialPerm = '-' + action.getPermission() + '.' + server;
			
			for(final String perm : Core.getCommandSenderPermission(executor)){
				if(perm.equals(denialPerm)){
					return false;
				}
			}
			return true;
		}
		// Else just check if he has the specified server perm
		return executor.hasPermission(action.getPermission() + '.' + server);
	}

	/**
	 * Check if this entity is an online player (if it's a player) and then
	 * return if it is exempt of the specified action
	 * 
	 * @param action
	 * @param target
	 * @return true if it is exempt from this action otherwise false
	 */
	public static boolean isExemptFrom(final Action action, final String target) {
		final ProxiedPlayer player = ProxyServer.getInstance().getPlayer(target);
		if (player != null) {
			return (player.hasPermission("bat.admin") || player.hasPermission(action.getPermission() + ".exempt"));
		}
		return false;
	}
}