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<?php

/*
 * BigBlueButton open source conferencing system -
https://www.bigbluebutton.org/.
 *
 * Copyright (c) 2016-2022 BigBlueButton Inc. and by respective authors
(see below).
 *
 * This program is free software; you can redistribute it and/or modify it
under the
 * terms of the GNU Lesser General Public License as published by the Free
Software
 * Foundation; either version 3.0 of the License, or (at your option) any
later
 * version.
 *
 * BigBlueButton is distributed in the hope that it will be useful, but
WITHOUT ANY
 * WARRANTY; without even the implied warranty of MERCHANTABILITY or
FITNESS FOR A
 * PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
details.
 *
 * You should have received a copy of the GNU Lesser General Public License
along
 * with BigBlueButton; if not, see <http://www.gnu.org/licenses/>.
 */

namespace BigBlueButton\Util;

/**
 * Class UrlBuilder.
 */
class UrlBuilder
{
    /**
     * @var string
     */
    private $securitySalt;

    /**
     * @var string
     */
    private $bbbServerBaseUrl;

    /**
     * UrlBuilder constructor.
     *
     * @param $secret
     * @param $serverBaseUrl
     */
    public function __construct($secret, $serverBaseUrl)
    {
        $this->securitySalt     = $secret;
        $this->bbbServerBaseUrl = $serverBaseUrl;
    }

    /**
     * Builds an API method URL that includes the url + params + its
generated checksum.
     *
     * @param string $method
     * @param string $params
     * @param bool   $append
     *
     * @return string
     */
    public function buildUrl($method = '', $params =
'', $append = true)
    {
        return $this->bbbServerBaseUrl . 'api/' . $method .
($append ? '?' . $this->buildQs($method, $params) :
'');
    }

    /**
     * Builds a query string for an API method URL that includes the params
+ its generated checksum.
     *
     * @param string $method
     * @param string $params
     *
     * @return string
     */
    public function buildQs($method = '', $params = '')
    {
        return $params . '&checksum=' . sha1($method .
$params . $this->securitySalt);
    }
}