<?php
/*
 * Name: invidious
 * Description: Replaces links to youtube.com to an invidious server in all displays of postings on a node.
 * Version: 1.0
 * Author: Tobias Diekershoff <tobias@social.diekershoff.de>
 *
 * Copyright (c) 2020 Tobias Diekershoff
 *
 * 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.
 */

use Friendica\Core\Addon;
use Friendica\DI;

function invidious_install() {
    Addon::registerHook ('prepare_body', 'addon/invidious/invidious.php', 'invidious_render');
}

/*
 *  replace "youtube.com" with "invidio.us"
 * https://invidio.us
 * https://invidious.fdn.fr/
 * https://ytb.trom.tf/
 * https://invidious.exonip.de/
 * 
 */
function invidious_render(&$a, &$o) {
    // this needs to be a system setting

    $invidious = 'https://invidious.fdn.fr';
	$replaced = false;
    if (strstr($o[html],'https://www.youtube.com')) {
		$o['html'] = str_replace('https://www.youtube.com', $invidious, $o[html]);
		$replaced = true;
    }
    if (strstr($o[html],'https://youtube.com')) {
		$o['html'] = str_replace('https://youtube.com', $invidious, $o[html]);
		$replaced = true;
    }
    if (strstr($o[html],'https://youtu.be')) {
		$o['html'] = str_replace('https://youtu.be', $invidious, $o[html]);
		$replaced = true;
	}
	// add a note about the replacement
	if ($replaced) {
        $o['html'] .= '<hr><p>'.DI::l10n()->t('Links to Youtube in this posting were replaced by links to the Nitter instance at %s', $invidious).'</p>';
	}
}