. Licensed under the GNU Affero General Public License v3.0. // See the LICENCE file in the repository root for full licence text. namespace App\Libraries; /* * Note that this class doesn't actually parse random bbcode. * It only does "second pass" parsing of phpbb-preprocessed bbcode. * Nothing in this class does any kind of checking because it should * be already done by phpbb. */ class BBCodeFromDB { public $text; public $uid; public $refId; public $withGallery; private array $options; public function __construct($text, $uid = '', $options = []) { $defaultOptions = [ 'withGallery' => false, 'ignoreLineHeight' => false, 'extraClasses' => '', 'modifiers' => [], ]; $this->text = $text; $this->uid = presence($uid) ?? $GLOBALS['cfg']['osu']['bbcode']['uid']; $this->options = array_merge($defaultOptions, $options); if ($this->options['withGallery']) { $this->refId = rand(); } } public function parseAudio($text) { preg_match_all("#\[audio:{$this->uid}\](?[^[]+)\[/audio:{$this->uid}\]#", $text, $matches, PREG_SET_ORDER); foreach ($matches as $match) { $proxiedSrc = proxy_media(html_entity_decode_better($match['url'])); $tag = '

'; $text = str_replace($match[0], $tag, $text); } return $text; } public function parseBold($text) { $text = str_replace("[b:{$this->uid}]", '', $text); $text = str_replace("[/b:{$this->uid}]", '', $text); return $text; } public function parseBox($text) { $text = preg_replace("#\[box=((\\\[\[\]]|[^][]|\[(\\\[\[\]]|[^][]|(?R))*\])*?):{$this->uid}\]\n*#s", $this->parseBoxHelperPrefix('\\1'), $text); $text = preg_replace("#\n*\[/box:{$this->uid}]\n?#s", $this->parseBoxHelperSuffix(), $text); $text = preg_replace("#\[spoilerbox:{$this->uid}\]\n*#s", $this->parseBoxHelperPrefix(), $text); $text = preg_replace("#\n*\[/spoilerbox:{$this->uid}]\n?#s", $this->parseBoxHelperSuffix(), $text); return $text; } public function parseBoxHelperPrefix($linkText = null) { $linkText = presence($linkText) ?? 'SPOILER'; return "

"; } public function parseBoxHelperSuffix() { return '

'; } public function parseCentre($text) { $text = str_replace("[centre:{$this->uid}]", '', $text); $text = str_replace("[/centre:{$this->uid}]", '', $text); return $text; } public function parseCode($text) { return preg_replace( "#\[code:{$this->uid}\]\n*(.*?)\n*\[/code:{$this->uid}\]\n?#s", '

\\1

', $text ); } public function parseColour($text) { $text = preg_replace("#\[color=([^:]+):{$this->uid}\]#", "", $text); $text = str_replace("[/color:{$this->uid}]", '', $text); return $text; } public function parseEmail($text) { $text = preg_replace( "#\[email:{$this->uid}\](.+?)\[/email:{$this->uid}\]#", "\\1", $text ); $text = preg_replace("#\[email=([^\]]+):{$this->uid}\]#", "", $text); $text = str_replace("[/email:{$this->uid}]", '', $text); return $text; } public function parseHeading($text) { $text = str_replace("[heading:{$this->uid}]", '

', $text); $text = preg_replace("#\[/heading:{$this->uid}\]\n?#", '

', $text); return $text; } public function parseImagemap($text) { return preg_replace_callback( '#(\[imagemap\].+?\[/imagemap\]\n?)#', function ($m) { $unescaped = html_entity_decode_better(BBCodeForDB::extraUnescape($m[1])); $parsed = preg_replace_callback( '#\[imagemap\]\n(?https?://.+)\n(?(?:(?:[0-9.]+ ){4}(?:\#|https?://[^\s]+|mailto:[^\s]+)(?: .*)?\n)+)\[/imagemap\]\n?#', function ($map) { $links = array_map( fn ($rawLink) => explode(' ', $rawLink, 6), explode("\n", $map['links']), ); array_pop($links); // remove the empty string from last newline $linksHtml = implode('', array_map( fn ($link) => tag($link[4] === '#' ? 'span' : 'a', [ 'class' => 'imagemap__link', 'href' => $link[4], 'style' => implode(';', [ "left: {$link[0]}%", "top: {$link[1]}%", "width: {$link[2]}%", "height: {$link[3]}%", ]), 'title' => $link[5] ?? '', ]), $links, )); $imageUrl = proxy_media($map['imageUrl']); $imageAttributes = [ 'class' => 'imagemap__image', 'loading' => 'lazy', 'src' => $imageUrl, ]; $imageSize = fast_imagesize($imageUrl); if ($imageSize !== null) { $imageAttributes['width'] = $imageSize[0]; $imageAttributes['height'] = $imageSize[1]; } $imageHtml = tag('img', $imageAttributes); return tag('div', ['class' => 'imagemap'], $imageHtml.$linksHtml); }, $unescaped, ); return $parsed === $unescaped ? $m[1] : $parsed; }, $text, ); } public function parseItalic($text) { $text = str_replace("[i:{$this->uid}]", '', $text); $text = str_replace("[/i:{$this->uid}]", '', $text); return $text; } public function parseImage($text) { preg_match_all("#\[img:{$this->uid}\](?[^[]+)\[/img:{$this->uid}\]#", $text, $images, PREG_SET_ORDER); $index = 0; $replacements = []; foreach ($images as $i) { $proxiedSrc = proxy_media(html_entity_decode_better($i['url'])); $attributes = [ 'alt' => '', 'src' => $proxiedSrc, 'loading' => 'lazy', ]; $imageSize = fast_imagesize($proxiedSrc); if ($imageSize !== null && $imageSize[1] !== 0) { $aspectRatio = round($imageSize[0] / $imageSize[1], 4); $attributes['style'] = "aspect-ratio: {$aspectRatio}; width: {$imageSize[0]}px;"; if ($this->options['withGallery']) { $attributes = [ ...$attributes, 'class' => 'js-gallery', 'data-width' => $imageSize[0], 'data-height' => $imageSize[1], 'data-index' => $index, 'data-gallery-id' => $this->refId, 'data-src' => $proxiedSrc, ]; } $index += 1; } $replacements[$i[0]] = tag('img', $attributes); } return strtr($text, $replacements); } public function parseInlineCode(string $text): string { return strtr($text, [ "[c:{$this->uid}]" => '

',
            "[/c:{$this->uid}]" => '

', ]); } public function parseList($text) { // basic list. $text = preg_replace("#\[list=[^]]+:{$this->uid}\]\s*\[\*:{$this->uid}\]#", '

', $text); $text = preg_replace("#\[list:{$this->uid}\]\s*\[\*:{$this->uid}\]#", '
1. ', $text); // convert list items. $text = preg_replace("#\[/\*(:m)?:{$this->uid}\]\n?\n?#", '
2. ', $text); // close list tags. $text = preg_replace("#\s*\[/list:(o|u):{$this->uid}\]\n?\n?#", '
', $text); // list with "title", with it being just a list without style. $text = preg_replace("#\[list=[^]]+:{$this->uid}\](.+?)(
|

)#s", '

\\1

[0-9]+))?:{$this->uid}\](?.*?)\[/profile:{$this->uid}\]#", $text, $users, PREG_SET_ORDER); foreach ($users as $user) { $username = html_entity_decode_better($user['name']); $userId = presence($user['id']) ?? "@{$username}"; $userLink = link_to_user($userId, $username, null); $text = str_replace($user[0], $userLink, $text); } return $text; } public function parseQuote($text) { $text = preg_replace("#\[quote="([^:]+)":{$this->uid}\]\s*#", '

\\1 wrote:
', $text); $text = preg_replace("#\[quote:{$this->uid}\]\s*#", '
', $text); $text = preg_replace("#\s*\[/quote:{$this->uid}\]\n?\n?#", '
', $text); return $text; } // stolen from: www/forum/includes/functions.php:2845 public function parseSmilies($text) { return preg_replace('#uid}]", '~~', $text); $text = str_replace("[/s:{$this->uid}]", '~~', $text); $text = str_replace("[strike:{$this->uid}]", '~~', $text); $text = str_replace("[/strike:{$this->uid}]", '~~', $text); return $text; } public function parseUnderline($text) { $text = str_replace("[u:{$this->uid}]", '', $text); $text = str_replace("[/u:{$this->uid}]", '', $text); return $text; } public function parseSpoiler($text) { $text = str_replace("[spoiler:{$this->uid}]", "", $text); $text = str_replace("[/spoiler:{$this->uid}]", '', $text); return $text; } public function parseSize($text) { $text = preg_replace_callback( "#\[size=(\d+):{$this->uid}\]#", fn ($m) => '', $text, ); $text = strtr($text, ["[/size:{$this->uid}]" => '']); return $text; } public function parseUrl($text) { $text = preg_replace("#\[url:{$this->uid}\](.+?)\[/url:{$this->uid}\]#", "\\1", $text); $text = preg_replace("#\[url=([^\]]+):{$this->uid}\]#", "", $text); $text = str_replace("[/url:{$this->uid}]", '', $text); return $text; } public function parseYoutube(string $text): string { return strtr($text, [ "[youtube:{$this->uid}]" => "", ]); } public function toHTML() { $text = $this->text; // block $text = $this->parseImagemap($text); $text = $this->parseBox($text); $text = $this->parseCode($text); $text = $this->parseList($text); $text = $this->parseNotice($text); $text = $this->parseQuote($text); $text = $this->parseHeading($text); // inline $text = $this->parseAudio($text); $text = $this->parseBold($text); $text = $this->parseCentre($text); $text = $this->parseInlineCode($text); $text = $this->parseColour($text); $text = $this->parseEmail($text); $text = $this->parseImage($text); $text = $this->parseItalic($text); $text = $this->parseSize($text); $text = $this->parseSmilies($text); $text = $this->parseSpoiler($text); $text = $this->parseStrike($text); $text = $this->parseUnderline($text); $text = $this->parseUrl($text); $text = $this->parseYoutube($text); $text = $this->parseProfile($text); $text = str_replace("\n", '
', $text); $text = app('clean-html')->purify($text); $className = class_with_modifiers('bbcode', $this->options['modifiers']); if (present($this->options['extraClasses'])) { $className .= " {$this->options['extraClasses']}"; } if ($this->options['ignoreLineHeight']) { $className .= ' bbcode--normal-line-height'; } return "
{$text}
"; } public function toEditor() { $text = $this->text; // remove list item closing tags $text = str_replace("[/*:m:{$this->uid}]", '', $text); // remove list item type marker at closing tags $text = preg_replace("#\[/list:[ou]:{$this->uid}\]#", '[/list]', $text); // strip uids $text = str_replace(":{$this->uid}]", ']', $text); // strip url $text = preg_replace('#.*?#', '\\2', $text); $text = preg_replace('#.*?#', '\\1', $text); // strip relative url $text = preg_replace('#.*?#', '\\1', $text); // strip smilies $text = preg_replace('#.*?#', '\\2', $text); return html_entity_decode_better($text); } public static function removeBBCodeTags($text) { // Don't care if too many characters are stripped; // just don't want tags to go into index because they mess up the highlighting. static $pattern = '#\[/?(\*|\*:m|audio|b|box|color|spoilerbox|centre|code|email|heading|i|img|list|list:o|list:u|notice|profile|quote|s|strike|u|spoiler|size|url|youtube)(=.*?(?=:))?(:[a-zA-Z0-9]{1,5})?\]#'; return preg_replace($pattern, '', $text); } public static function removeBlockQuotes($text) { static $pattern = '#(?\[quote(=.*?(?=:))?(:[a-zA-Z0-9]{1,5})?\])|(?\[/quote(:[a-zA-Z0-9]{1,5})?\])#'; $matchCount = preg_match_all($pattern, $text); $quotePositions = []; for ($_ = 0; $_ < $matchCount; $_++) { $offset = $quotePositions[count($quotePositions) - 1][1] ?? 0; preg_match($pattern, $text, $match, PREG_OFFSET_CAPTURE, $offset); if (present($match['start'][0])) { $quotePositions[] = [ $match['start'][1], $match['start'][1] + strlen($match['start'][0]), ]; } elseif (!empty($quotePositions)) { $quoteEnd = $match['end'][1] + strlen($match['end'][0]); $text = substr($text, 0, array_pop($quotePositions)[0]).substr($text, $quoteEnd); } } return $text; } }