/**
	 * Checks if an entity can attack another.
	 *
	 * @param source
	 *            The source entity.
	 * @param victim
	 *            The target entity.
	 * @return <code>true</code> if so, <code>false</code> if not.
	 */
	public static boolean canAttack(Entity source, Entity victim) {
		/*
		 * Check for the state of life of both entities.
		 */
		if (victim.isDead() || source.isDead())
			return false;
		/*
		 * Check if the victim is already in combat and if the current zone of
		 * both entities allows multicombat.
		 */
		if (victim.isInCombat()
				&& (victim.getZone().getType() == ZoneType.COMBAT_SINGLE || source
						.getZone().getType() == ZoneType.COMBAT_SINGLE)) {
			if (source instanceof Player) {
				Player p = (Player) source;
				p.getActionSender().sendMessage(
						"That opponent is already under attack!");
			}
			return false;
		}
		if ((source instanceof Player) && (victim instanceof Player)) {
			// Player VS Player
		} else if ((source instanceof Player) && (victim instanceof NPC)) {
			// Player VS NPC
		} else if ((source instanceof NPC) && victim instanceof Player) {
			// NPC VS Player
		} else if ((source instanceof NPC && victim instanceof NPC)) {
			// NPC VS NPC
		}
		return true;
	}