<?php
/**
 * CodeIgniter
 *
 * An open source application development framework for PHP
 *
 * This content is released under the MIT License (MIT)
 *
 * Copyright (c) 2014-2019 British Columbia Institute of Technology
 *
 * Permission is hereby granted, free of charge, to any person obtaining a copy
 * of this software and associated documentation files (the "Software"), to deal
 * in the Software without restriction, including without limitation the rights
 * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
 * copies of the Software, and to permit persons to whom the Software is
 * furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice shall be included in
 * all copies or substantial portions of the Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
 * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
 * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
 * THE SOFTWARE.
 *
 * @package    CodeIgniter
 * @author     CodeIgniter Dev Team
 * @copyright  2014-2019 British Columbia Institute of Technology (https://bcit.ca/)
 * @license    https://opensource.org/licenses/MIT	MIT License
 * @link       https://codeigniter.com
 * @since      Version 4.0.0
 * @filesource
 */

namespace CodeIgniter\Throttle;

/**
 * Expected behavior of a Throttler
 */
interface ThrottlerInterface
{

	/**
	 * Restricts the number of requests made by a single key within
	 * a set number of seconds.
	 *
	 * Example:
	 *
	 *  if (! $throttler->checkIPAddress($request->ipAddress(), 60, MINUTE))
	 * {
	 *      die('You submitted over 60 requests within a minute.');
	 * }
	 *
	 * @param string  $key      The name to use as the "bucket" name.
	 * @param integer $capacity The number of requests the "bucket" can hold
	 * @param integer $seconds  The time it takes the "bucket" to completely refill
	 * @param integer $cost     The number of tokens this action uses.
	 *
	 * @return boolean
	 */
	public function check(string $key, int $capacity, int $seconds, int $cost);

	//--------------------------------------------------------------------

	/**
	 * Returns the number of seconds until the next available token will
	 * be released for usage.
	 *
	 * @return integer
	 */
	public function getTokenTime(): int;
}
