<?php
/**
 * @copyright Copyright (C) 2020, Friendica
 *
 * @license GNU AGPL version 3 or any later version
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 *
 * This program 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 Affero General Public License for more details.
 *
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <https://www.gnu.org/licenses/>.
 *
 */

namespace Friendica\Module\Debug;

use Friendica\BaseModule;
use Friendica\Content\PageInfo;
use Friendica\Content\Text;
use Friendica\Core\Renderer;
use Friendica\DI;
use Friendica\Model\Item;
use Friendica\Protocol\Activity;
use Friendica\Util\XML;

/**
 * Translates input text into different formats (HTML, BBCode, Markdown)
 */
class Babel extends BaseModule
{
	public static function content(array $parameters = [])
	{
		function visible_whitespace($s)
		{
			return '<pre>' . htmlspecialchars($s) . '</pre>';
		}

		$results = [];
		if (!empty($_REQUEST['text'])) {
			switch (($_REQUEST['type'] ?? '') ?: 'bbcode') {
				case 'bbcode':
					$bbcode = $_REQUEST['text'];
					$results[] = [
						'title'   => DI::l10n()->t('Source input'),
						'content' => visible_whitespace($bbcode)
					];

					$plain = Text\BBCode::toPlaintext($bbcode, false);
					$results[] = [
						'title'   => DI::l10n()->t('BBCode::toPlaintext'),
						'content' => visible_whitespace($plain)
					];

					$html = Text\BBCode::convert($bbcode);
					$results[] = [
						'title'   => DI::l10n()->t('BBCode::convert (raw HTML)'),
						'content' => visible_whitespace($html)
					];

					$results[] = [
						'title'   => DI::l10n()->t('BBCode::convert (hex)'),
						'content' => visible_whitespace(bin2hex($html)),
					];

					$results[] = [
						'title'   => DI::l10n()->t('BBCode::convert'),
						'content' => $html
					];

					$bbcode2 = Text\HTML::toBBCode($html);
					$results[] = [
						'title'   => DI::l10n()->t('BBCode::convert => HTML::toBBCode'),
						'content' => visible_whitespace($bbcode2)
					];

					$markdown = Text\BBCode::toMarkdown($bbcode);
					$results[] = [
						'title'   => DI::l10n()->t('BBCode::toMarkdown'),
						'content' => visible_whitespace($markdown)
					];

					$html2 = Text\Markdown::convert($markdown);
					$results[] = [
						'title'   => DI::l10n()->t('BBCode::toMarkdown => Markdown::convert (raw HTML)'),
						'content' => visible_whitespace($html2)
					];
					$results[] = [
						'title'   => DI::l10n()->t('BBCode::toMarkdown => Markdown::convert'),
						'content' => $html2
					];

					$bbcode3 = Text\Markdown::toBBCode($markdown);
					$results[] = [
						'title'   => DI::l10n()->t('BBCode::toMarkdown => Markdown::toBBCode'),
						'content' => visible_whitespace($bbcode3)
					];

					$bbcode4 = Text\HTML::toBBCode($html2);
					$results[] = [
						'title'   => DI::l10n()->t('BBCode::toMarkdown =>  Markdown::convert => HTML::toBBCode'),
						'content' => visible_whitespace($bbcode4)
					];

					$tags = Text\BBCode::getTags($bbcode);

					$body = Item::setHashtags($bbcode);
					$results[] = [
						'title'   => DI::l10n()->t('Item Body'),
						'content' => visible_whitespace($body)
					];
					$results[] = [
						'title'   => DI::l10n()->t('Item Tags'),
						'content' => visible_whitespace(var_export($tags, true)),
					];

					$body2 = PageInfo::searchAndAppendToBody($bbcode, true);
					$results[] = [
						'title'   => DI::l10n()->t('PageInfo::appendToBody'),
						'content' => visible_whitespace($body2)
					];
					$html3 = Text\BBCode::convert($body2);
					$results[] = [
						'title'   => DI::l10n()->t('PageInfo::appendToBody => BBCode::convert (raw HTML)'),
						'content' => visible_whitespace($html3)
					];
					$results[] = [
						'title'   => DI::l10n()->t('PageInfo::appendToBody => BBCode::convert'),
						'content' => $html3
					];
					break;
				case 'diaspora':
					$diaspora = trim($_REQUEST['text']);
					$results[] = [
						'title'   => DI::l10n()->t('Source input (Diaspora format)'),
						'content' => visible_whitespace($diaspora),
					];

					$markdown = XML::unescape($diaspora);
				case 'markdown':
					$markdown = $markdown ?? trim($_REQUEST['text']);

					$results[] = [
						'title'   => DI::l10n()->t('Source input (Markdown)'),
						'content' => visible_whitespace($markdown),
					];

					$html = Text\Markdown::convert($markdown);
					$results[] = [
						'title'   => DI::l10n()->t('Markdown::convert (raw HTML)'),
						'content' => visible_whitespace($html),
					];

					$results[] = [
						'title'   => DI::l10n()->t('Markdown::convert'),
						'content' => $html
					];

					$bbcode = Text\Markdown::toBBCode($markdown);
					$results[] = [
						'title'   => DI::l10n()->t('Markdown::toBBCode'),
						'content' => visible_whitespace($bbcode),
					];
					break;
				case 'html' :
					$html = trim($_REQUEST['text']);
					$results[] = [
						'title'   => DI::l10n()->t('Raw HTML input'),
						'content' => visible_whitespace($html),
					];

					$results[] = [
						'title'   => DI::l10n()->t('HTML Input'),
						'content' => $html
					];

					$config = \HTMLPurifier_Config::createDefault();
					$HTMLPurifier = new \HTMLPurifier($config);
					$purified = $HTMLPurifier->purify($html);

					$results[] = [
						'title'   => DI::l10n()->t('HTML Purified (raw)'),
						'content' => visible_whitespace($purified),
					];

					$results[] = [
						'title'   => DI::l10n()->t('HTML Purified (hex)'),
						'content' => visible_whitespace(bin2hex($purified)),
					];

					$results[] = [
						'title'   => DI::l10n()->t('HTML Purified'),
						'content' => $purified,
					];

					$bbcode = Text\HTML::toBBCode($html);
					$results[] = [
						'title'   => DI::l10n()->t('HTML::toBBCode'),
						'content' => visible_whitespace($bbcode)
					];

					$html2 = Text\BBCode::convert($bbcode);
					$results[] = [
						'title'   => DI::l10n()->t('HTML::toBBCode => BBCode::convert'),
						'content' => $html2
					];

					$results[] = [
						'title'   => DI::l10n()->t('HTML::toBBCode => BBCode::convert (raw HTML)'),
						'content' => htmlspecialchars($html2)
					];

					$bbcode2plain = Text\BBCode::toPlaintext($bbcode);
					$results[] = [
						'title'   => DI::l10n()->t('HTML::toBBCode => BBCode::toPlaintext'),
						'content' => visible_whitespace($bbcode2plain),
					];

					$markdown = Text\HTML::toMarkdown($html);
					$results[] = [
						'title'   => DI::l10n()->t('HTML::toMarkdown'),
						'content' => visible_whitespace($markdown)
					];

					$text = Text\HTML::toPlaintext($html, 0);
					$results[] = [
						'title'   => DI::l10n()->t('HTML::toPlaintext'),
						'content' => visible_whitespace($text),
					];

					$text = Text\HTML::toPlaintext($html, 0, true);
					$results[] = [
						'title'   => DI::l10n()->t('HTML::toPlaintext (compact)'),
						'content' => visible_whitespace($text),
					];
					break;
				case 'twitter':
					$json = trim($_REQUEST['text']);

					if (file_exists('addon/twitter/twitter.php')) {
						require_once 'addon/twitter/twitter.php';

						if (parse_url($json) !== false) {
							preg_match('#^https?://(?:mobile\.|www\.)?twitter.com/[^/]+/status/(\d+).*#', $json, $matches);
							$status = twitter_statuses_show($matches[1]);
						} else {
							$status = json_decode($json);
						}

						$results[] = [
							'title'   => DI::l10n()->t('Decoded post'),
							'content' => visible_whitespace(var_export($status, true)),
						];

						$postarray = [];
						$postarray['object-type'] = Activity\ObjectType::NOTE;

						if (!empty($status->full_text)) {
							$postarray['body'] = $status->full_text;
						} else {
							$postarray['body'] = $status->text;
						}

						// When the post contains links then use the correct object type
						if (count($status->entities->urls) > 0) {
							$postarray['object-type'] = Activity\ObjectType::BOOKMARK;
						}

						$picture = \twitter_media_entities($status, $postarray);

						$results[] = [
							'title'   => DI::l10n()->t('Post array before expand entities'),
							'content' => visible_whitespace(var_export($postarray, true)),
						];

						$converted = \twitter_expand_entities($postarray['body'], $status, $picture);

						$results[] = [
							'title'   => DI::l10n()->t('Post converted'),
							'content' => visible_whitespace(var_export($converted, true)),
						];

						$results[] = [
							'title'   => DI::l10n()->t('Converted body'),
							'content' => visible_whitespace($converted['body']),
						];
					} else {
						$results[] = [
							'title'   => DI::l10n()->t('Error'),
							'content' => DI::l10n()->t('Twitter addon is absent from the addon/ folder.'),
						];
					}

					break;
			}
		}

		$tpl = Renderer::getMarkupTemplate('babel.tpl');
		$o = Renderer::replaceMacros($tpl, [
			'$title'         => DI::l10n()->t('Babel Diagnostic'),
			'$text'          => ['text', DI::l10n()->t('Source text'), $_REQUEST['text'] ?? '', ''],
			'$type_bbcode'   => ['type', DI::l10n()->t('BBCode'), 'bbcode', '', (($_REQUEST['type'] ?? '') ?: 'bbcode') == 'bbcode'],
			'$type_diaspora' => ['type', DI::l10n()->t('Diaspora'), 'diaspora', '', (($_REQUEST['type'] ?? '') ?: 'bbcode') == 'diaspora'],
			'$type_markdown' => ['type', DI::l10n()->t('Markdown'), 'markdown', '', (($_REQUEST['type'] ?? '') ?: 'bbcode') == 'markdown'],
			'$type_html'     => ['type', DI::l10n()->t('HTML'), 'html', '', (($_REQUEST['type'] ?? '') ?: 'bbcode') == 'html'],
			'$flag_twitter'  => file_exists('addon/twitter/twitter.php'),
			'$type_twitter'  => ['type', DI::l10n()->t('Twitter Source / Tweet URL (requires API key)'), 'twitter', '', (($_REQUEST['type'] ?? '') ?: 'bbcode') == 'twitter'],
			'$results'       => $results,
			'$submit'        => DI::l10n()->t('Submit'),
		]);

		return $o;
	}
}