. * */ namespace Friendica\Content\Text; use DOMDocument; use DOMXPath; use Exception; use Friendica\Content\ContactSelector; use Friendica\Content\Item; use Friendica\Content\OEmbed; use Friendica\Content\PageInfo; use Friendica\Content\Smilies; use Friendica\Core\Hook; use Friendica\Core\Logger; use Friendica\Core\Protocol; use Friendica\Core\Renderer; use Friendica\DI; use Friendica\Model\Contact; use Friendica\Model\Event; use Friendica\Model\Photo; use Friendica\Model\Post; use Friendica\Model\Tag; use Friendica\Network\HTTPClient\Client\HttpClientAccept; use Friendica\Network\HTTPClient\Client\HttpClientOptions; use Friendica\Object\Image; use Friendica\Protocol\Activity; use Friendica\Util\Images; use Friendica\Util\Map; use Friendica\Util\ParseUrl; use Friendica\Util\Proxy; use Friendica\Util\Strings; use Friendica\Util\XML; class BBCode { // Update this value to the current date whenever changes are made to BBCode::convert const VERSION = '2021-07-28'; const INTERNAL = 0; const EXTERNAL = 1; const API = 2; const DIASPORA = 3; const CONNECTORS = 4; const OSTATUS = 7; const TWITTER = 8; const BACKLINK = 8; const ACTIVITYPUB = 9; const TOP_ANCHOR = '
'; const BOTTOM_ANCHOR = '
'; /** * Fetches attachment data that were generated the old way * * @param string $body Message body * @return array * 'type' -> Message type ('link', 'video', 'photo') * 'text' -> Text before the shared message * 'after' -> Text after the shared message * 'image' -> Preview image of the message * 'url' -> Url to the attached message * 'title' -> Title of the attachment * 'description' -> Description of the attachment * @throws \Friendica\Network\HTTPException\InternalServerErrorException */ private static function getOldAttachmentData(string $body): array { $post = []; // Simplify image codes $body = preg_replace("/\[img\=([0-9]*)x([0-9]*)\](.*?)\[\/img\]/ism", '[img]$3[/img]', $body); if (preg_match_all("(\[class=(.*?)\](.*?)\[\/class\])ism", $body, $attached, PREG_SET_ORDER)) { foreach ($attached as $data) { if (!in_array($data[1], ['type-link', 'type-video', 'type-photo'])) { continue; } $post['type'] = substr($data[1], 5); $pos = strpos($body, $data[0]); if ($pos > 0) { $post['text'] = trim(substr($body, 0, $pos)); $post['after'] = trim(substr($body, $pos + strlen($data[0]))); } else { $post['text'] = trim(str_replace($data[0], '', $body)); $post['after'] = ''; } $attacheddata = $data[2]; if (preg_match("/\[img\](.*?)\[\/img\]/ism", $attacheddata, $matches)) { $picturedata = Images::getInfoFromURLCached($matches[1]); if ($picturedata) { if (($picturedata[0] >= 500) && ($picturedata[0] >= $picturedata[1])) { $post['image'] = $matches[1]; } else { $post['preview'] = $matches[1]; } } } if (preg_match("/\[bookmark\=(.*?)\](.*?)\[\/bookmark\]/ism", $attacheddata, $matches)) { $post['url'] = $matches[1]; $post['title'] = $matches[2]; } if (!empty($post['url']) && (in_array($post['type'], ['link', 'video'])) && preg_match("/\[url\=(.*?)\](.*?)\[\/url\]/ism", $attacheddata, $matches)) { $post['url'] = $matches[1]; } // Search for description if (preg_match("/\[quote\](.*?)\[\/quote\]/ism", $attacheddata, $matches)) { $post['description'] = $matches[1]; } } } return $post; } /** * Fetches attachment data that were generated with the "attachment" element * * @param string $body Message body * @return array * 'type' -> Message type ('link', 'video', 'photo') * 'text' -> Text before the shared message * 'after' -> Text after the shared message * 'image' -> Preview image of the message * 'url' -> Url to the attached message * 'title' -> Title of the attachment * 'description' -> Description of the attachment * @throws \Friendica\Network\HTTPException\InternalServerErrorException */ public static function getAttachmentData(string $body): array { DI::profiler()->startRecording('rendering'); $data = [ 'type' => '', 'text' => '', 'after' => '', 'image' => null, 'url' => '', 'author_name' => '', 'author_url' => '', 'provider_name' => '', 'provider_url' => '', 'title' => '', 'description' => '', ]; if (!preg_match("/(.*)\[attachment(.*?)\](.*?)\[\/attachment\](.*)/ism", $body, $match)) { DI::profiler()->stopRecording(); return self::getOldAttachmentData($body); } $attributes = $match[2]; $data['text'] = trim($match[1]); foreach (['type', 'url', 'title', 'image', 'preview', 'publisher_name', 'publisher_url', 'author_name', 'author_url'] as $field) { preg_match('/' . preg_quote($field, '/') . '=("|\')(.*?)\1/ism', $attributes, $matches); $value = $matches[2] ?? ''; if ($value != '') { switch ($field) { case 'publisher_name': $data['provider_name'] = html_entity_decode($value, ENT_QUOTES, 'UTF-8'); break; case 'publisher_url': $data['provider_url'] = html_entity_decode($value, ENT_QUOTES, 'UTF-8'); break; case 'author_name': $data['author_name'] = html_entity_decode($value, ENT_QUOTES, 'UTF-8'); if ($data['provider_name'] == $data['author_name']) { $data['author_name'] = ''; } break; case 'author_url': $data['author_url'] = html_entity_decode($value, ENT_QUOTES, 'UTF-8'); if ($data['provider_url'] == $data['author_url']) { $data['author_url'] = ''; } break; case 'title': $value = self::convert(html_entity_decode($value, ENT_QUOTES, 'UTF-8'), false, true); $value = html_entity_decode($value, ENT_QUOTES, 'UTF-8'); $value = str_replace(['[', ']'], ['[', ']'], $value); $data['title'] = $value; default: $data[$field] = html_entity_decode($value, ENT_QUOTES, 'UTF-8'); break; } } } if (!in_array($data['type'], ['link', 'audio', 'photo', 'video'])) { DI::profiler()->stopRecording(); return []; } $data['description'] = trim($match[3]); $data['after'] = trim($match[4]); $parts = parse_url($data['url']); if (!empty($parts['scheme']) && !empty($parts['host'])) { if (empty($data['provider_name'])) { $data['provider_name'] = $parts['host']; } if (empty($data['provider_url']) || empty(parse_url($data['provider_url'], PHP_URL_SCHEME))) { $data['provider_url'] = $parts['scheme'] . '://' . $parts['host']; if (!empty($parts['port'])) { $data['provider_url'] .= ':' . $parts['port']; } } } DI::profiler()->stopRecording(); return $data; } public static function getAttachedData(string $body, array $item = []): array { /* - text: - type: link, video, photo - title: - url: - image: - description: - (thumbnail) */ DI::profiler()->startRecording('rendering'); $has_title = !empty($item['title']); $plink = $item['plink'] ?? ''; $post = self::getAttachmentData($body); // Get all linked images with alternative image description if (preg_match_all("/\[img=(http[^\[\]]*)\]([^\[\]]*)\[\/img\]/Usi", $body, $pictures, PREG_SET_ORDER)) { foreach ($pictures as $picture) { if (Photo::isLocal($picture[1])) { $post['images'][] = ['url' => str_replace('-1.', '-0.', $picture[1]), 'description' => $picture[2]]; } else { $post['remote_images'][] = ['url' => $picture[1], 'description' => $picture[2]]; } } if (!empty($post['images']) && !empty($post['images'][0]['description'])) { $post['image_description'] = $post['images'][0]['description']; } } if (preg_match_all("/\[img\]([^\[\]]*)\[\/img\]/Usi", $body, $pictures, PREG_SET_ORDER)) { foreach ($pictures as $picture) { if (Photo::isLocal($picture[1])) { $post['images'][] = ['url' => str_replace('-1.', '-0.', $picture[1]), 'description' => '']; } else { $post['remote_images'][] = ['url' => $picture[1], 'description' => '']; } } } if (!isset($post['type'])) { $post['text'] = $body; } // Simplify image codes $post['text'] = preg_replace("/\[img\=([0-9]*)x([0-9]*)\](.*?)\[\/img\]/ism", '[img]$3[/img]', $post['text']); $post['text'] = preg_replace("/\[img\=(.*?)\](.*?)\[\/img\]/ism", '[img]$1[/img]', $post['text']); // if nothing is found, it maybe having an image. if (!isset($post['type'])) { if (preg_match_all("#\[url=([^\]]+?)\]\s*\[img\]([^\[]+?)\[/img\]\s*\[/url\]#ism", $post['text'], $pictures, PREG_SET_ORDER)) { if ((count($pictures) == 1) && !$has_title) { if (!empty($item['object-type']) && ($item['object-type'] == Activity\ObjectType::IMAGE)) { // Replace the preview picture with the real picture $url = str_replace('-1.', '-0.', $pictures[0][2]); $data = ['url' => $url, 'type' => 'photo']; } else { // Checking, if the link goes to a picture $data = ParseUrl::getSiteinfoCached($pictures[0][1]); } // Workaround: // Sometimes photo posts to the own album are not detected at the start. // So we seem to cannot use the cache for these cases. That's strange. if (($data['type'] != 'photo') && strstr($pictures[0][1], '/photos/')) { $data = ParseUrl::getSiteinfo($pictures[0][1]); } if ($data['type'] == 'photo') { $post['type'] = 'photo'; if (isset($data['images'][0])) { $post['image'] = $data['images'][0]['src']; $post['url'] = $data['url']; } else { $post['image'] = $data['url']; } $post['preview'] = $pictures[0][2]; $post['text'] = trim(str_replace($pictures[0][0], '', $post['text'])); } else { $imgdata = Images::getInfoFromURLCached($pictures[0][1]); if (($imgdata) && substr($imgdata['mime'], 0, 6) == 'image/') { $post['type'] = 'photo'; $post['image'] = $pictures[0][1]; $post['preview'] = $pictures[0][2]; $post['text'] = trim(str_replace($pictures[0][0], '', $post['text'])); } } } elseif (count($pictures) > 0) { if (count($pictures) > 4) { $post['type'] = 'link'; $post['url'] = $plink; } else { $post['type'] = 'photo'; } $post['image'] = $pictures[0][2]; foreach ($pictures as $picture) { $post['text'] = trim(str_replace($picture[0], '', $post['text'])); } } } elseif (preg_match_all("(\[img\](.*?)\[\/img\])ism", $post['text'], $pictures, PREG_SET_ORDER)) { if ($has_title) { $post['type'] = 'link'; $post['url'] = $plink; } else { $post['type'] = 'photo'; } $post['image'] = $pictures[0][1]; foreach ($pictures as $picture) { $post['text'] = trim(str_replace($picture[0], '', $post['text'])); } } // Test for the external links preg_match_all("(\[url\](.*?)\[\/url\])ism", $post['text'], $links1, PREG_SET_ORDER); preg_match_all("(\[url\=(.*?)\].*?\[\/url\])ism", $post['text'], $links2, PREG_SET_ORDER); $links = array_merge($links1, $links2); // If there is only a single one, then use it. // This should cover link posts via API. if ((count($links) == 1) && !isset($post['preview']) && !$has_title) { $post['type'] = 'link'; $post['url'] = $links[0][1]; } // Simplify "video" element $post['text'] = preg_replace('(\[video.*?\ssrc\s?=\s?([^\s\]]+).*?\].*?\[/video\])ism', '[video]$1[/video]', $post['text']); // Now count the number of external media links preg_match_all("(\[vimeo\](.*?)\[\/vimeo\])ism", $post['text'], $links1, PREG_SET_ORDER); preg_match_all("(\[youtube\\](.*?)\[\/youtube\\])ism", $post['text'], $links2, PREG_SET_ORDER); preg_match_all("(\[video\\](.*?)\[\/video\\])ism", $post['text'], $links3, PREG_SET_ORDER); preg_match_all("(\[audio\\](.*?)\[\/audio\\])ism", $post['text'], $links4, PREG_SET_ORDER); // Add them to the other external links $links = array_merge($links, $links1, $links2, $links3, $links4); // Are there more than one? if (count($links) > 1) { // The post will be the type "text", which means a blog post unset($post['type']); $post['url'] = $plink; } if (!isset($post['type'])) { $post['type'] = 'text'; } if (($post['type'] == 'photo') && empty($post['images']) && !empty($post['remote_images'])) { $post['images'] = $post['remote_images']; $post['image'] = $post['images'][0]['url']; if (!empty($post['images']) && !empty($post['images'][0]['description'])) { $post['image_description'] = $post['images'][0]['description']; } } unset($post['remote_images']); } elseif (isset($post['url']) && ($post['type'] == 'video')) { $data = ParseUrl::getSiteinfoCached($post['url']); if (isset($data['images'][0])) { $post['image'] = $data['images'][0]['src']; } } elseif (preg_match_all("#\[url=([^\]]+?)\]\s*\[img\]([^\[]+?)\[/img\]\s*\[/url\]#ism", $post['text'], $pictures, PREG_SET_ORDER)) { foreach ($pictures as $picture) { $post['text'] = trim(str_replace($picture[0], '', $post['text'])); } } DI::profiler()->stopRecording(); return $post; } /** * Remove [attachment] BBCode and replaces it with a regular [url] * * @param string $body * @param boolean $no_link_desc No link description * @return string with replaced body */ public static function removeAttachment(string $body, bool $no_link_desc = false): string { return preg_replace_callback("/\s*\[attachment (.*?)\](.*?)\[\/attachment\]\s*/ism", function ($match) use ($body, $no_link_desc) { $attach_data = self::getAttachmentData($match[0]); if (empty($attach_data['url'])) { return $match[0]; } elseif (strpos(str_replace($match[0], '', $body), $attach_data['url']) !== false) { return ''; } elseif (empty($attach_data['title']) || $no_link_desc) { return " \n[url]" . $attach_data['url'] . "[/url]\n"; } else { return " \n[url=" . $attach_data['url'] . ']' . $attach_data['title'] . "[/url]\n"; } }, $body); } /** * Converts a BBCode text into plaintext * * @param string $text * @param bool $keep_urls Whether to keep URLs in the resulting plaintext * @return string */ public static function toPlaintext(string $text, bool $keep_urls = true): string { DI::profiler()->startRecording('rendering'); // Remove pictures in advance to avoid unneeded proxy calls $text = preg_replace("/\[img\=(.*?)\](.*?)\[\/img\]/ism", ' $2 ', $text); $text = preg_replace("/\[img.*?\[\/img\]/ism", ' ', $text); // Remove attachment $text = self::removeAttachment($text); $naked_text = HTML::toPlaintext(self::convert($text, false, 0, true), 0, !$keep_urls); DI::profiler()->stopRecording(); return $naked_text; } private static function proxyUrl(string $image, int $simplehtml = self::INTERNAL, int $uriid = 0, string $size = ''): string { // Only send proxied pictures to API and for internal display if (!in_array($simplehtml, [self::INTERNAL, self::API])) { return $image; } elseif ($uriid > 0) { return Post\Link::getByLink($uriid, $image, $size); } else { return Proxy::proxifyUrl($image, $size); } } /** * This function changing the visual size (not the real size) of images. * The function does not work for pictures with an alternate text description. * This could only be changed by using some new "img" BBCode format. * * @param string $srctext The body with images * @return string The body with possibly scaled images */ public static function scaleExternalImages(string $srctext): string { DI::profiler()->startRecording('rendering'); $s = $srctext; // Simplify image links $s = preg_replace("/\[img\=([0-9]*)x([0-9]*)\](.*?)\[\/img\]/ism", '[img]$3[/img]', $s); $matches = null; $c = preg_match_all('/\[img.*?\](.*?)\[\/img\]/ism', $s, $matches, PREG_SET_ORDER); if ($c) { foreach ($matches as $mtch) { Logger::debug('scale_external_image', ['image' => $mtch[1]]); $hostname = str_replace('www.', '', substr(DI::baseUrl(), strpos(DI::baseUrl(), '://') + 3)); if (stristr($mtch[1], $hostname)) { continue; } $curlResult = DI::httpClient()->get($mtch[1], HttpClientAccept::IMAGE); if (!$curlResult->isSuccess()) { continue; } Logger::debug('Got picture', ['Content-Type' => $curlResult->getHeader('Content-Type'), 'url' => $mtch[1]]); $i = $curlResult->getBody(); $type = $curlResult->getContentType(); $type = Images::getMimeTypeByData($i, $mtch[1], $type); if ($i) { $Image = new Image($i, $type); if ($Image->isValid()) { $orig_width = $Image->getWidth(); $orig_height = $Image->getHeight(); if ($orig_width > 640 || $orig_height > 640) { $Image->scaleDown(640); $new_width = $Image->getWidth(); $new_height = $Image->getHeight(); Logger::debug('External images scaled', ['orig_width' => $orig_width, 'new_width' => $new_width, 'orig_height' => $orig_height, 'new_height' => $new_height, 'match' => $mtch[0]]); $s = str_replace( $mtch[0], '[img=' . $new_width . 'x' . $new_height. ']' . $mtch[1] . '[/img]' . "\n", $s ); Logger::debug('New string', ['image' => $s]); } } } } } DI::profiler()->stopRecording(); return $s; } /** * Truncates imported message body string length to max_import_size * * The purpose of this function is to apply system message length limits to * imported messages without including any embedded photos in the length * * @param string $body * @return string * @throws \Friendica\Network\HTTPException\InternalServerErrorException */ public static function limitBodySize(string $body): string { DI::profiler()->startRecording('rendering'); $maxlen = DI::config()->get('config', 'max_import_size', 0); // If the length of the body, including the embedded images, is smaller // than the maximum, then don't waste time looking for the images if ($maxlen && (strlen($body) > $maxlen)) { Logger::info('the total body length exceeds the limit', ['maxlen' => $maxlen, 'body_len' => strlen($body)]); $orig_body = $body; $new_body = ''; $textlen = 0; $img_start = strpos($orig_body, '[img'); $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false); $img_end = ($img_start !== false ? strpos(substr($orig_body, $img_start), '[/img]') : false); while (($img_st_close !== false) && ($img_end !== false)) { $img_st_close++; // make it point to AFTER the closing bracket $img_end += $img_start; $img_end += strlen('[/img]'); if (!strcmp(substr($orig_body, $img_start + $img_st_close, 5), 'data:')) { // This is an embedded image if (($textlen + $img_start) > $maxlen) { if ($textlen < $maxlen) { Logger::debug('the limit happens before an embedded image'); $new_body = $new_body . substr($orig_body, 0, $maxlen - $textlen); $textlen = $maxlen; } } else { $new_body = $new_body . substr($orig_body, 0, $img_start); $textlen += $img_start; } $new_body = $new_body . substr($orig_body, $img_start, $img_end - $img_start); } else { if (($textlen + $img_end) > $maxlen) { if ($textlen < $maxlen) { Logger::debug('the limit happens before the end of a non-embedded image'); $new_body = $new_body . substr($orig_body, 0, $maxlen - $textlen); $textlen = $maxlen; } } else { $new_body = $new_body . substr($orig_body, 0, $img_end); $textlen += $img_end; } } $orig_body = substr($orig_body, $img_end); if ($orig_body === false) { // in case the body ends on a closing image tag $orig_body = ''; } $img_start = strpos($orig_body, '[img'); $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false); $img_end = ($img_start !== false ? strpos(substr($orig_body, $img_start), '[/img]') : false); } if (($textlen + strlen($orig_body)) > $maxlen) { if ($textlen < $maxlen) { Logger::debug('the limit happens after the end of the last image'); $new_body = $new_body . substr($orig_body, 0, $maxlen - $textlen); } } else { Logger::debug('the text size with embedded images extracted did not violate the limit'); $new_body = $new_body . $orig_body; } DI::profiler()->stopRecording(); return $new_body; } else { DI::profiler()->stopRecording(); return $body; } } /** * Processes [attachment] tags * * Note: Can produce a [bookmark] tag in the returned string * * @param string $text * @param integer $simplehtml * @param bool $tryoembed * @param array $data * @param int $uriid * @return string * @throws \Friendica\Network\HTTPException\InternalServerErrorException */ public static function convertAttachment(string $text, int $simplehtml = self::INTERNAL, bool $tryoembed = true, array $data = [], int $uriid = 0): string { DI::profiler()->startRecording('rendering'); $data = $data ?: self::getAttachmentData($text); if (empty($data) || empty($data['url'])) { DI::profiler()->stopRecording(); return $text; } if (isset($data['title'])) { $data['title'] = strip_tags($data['title']); $data['title'] = str_replace(['http://', 'https://'], '', $data['title']); } else { $data['title'] = ''; } if (((strpos($data['text'], '[img=') !== false) || (strpos($data['text'], '[img]') !== false) || DI::config()->get('system', 'always_show_preview')) && !empty($data['image'])) { $data['preview'] = $data['image']; $data['image'] = ''; } $return = ''; try { if ($tryoembed && OEmbed::isAllowedURL($data['url'])) { $return = OEmbed::getHTML($data['url'], $data['title']); } else { throw new Exception('OEmbed is disabled for this attachment.'); } } catch (Exception $e) { $data['title'] = ($data['title'] ?? '') ?: $data['url']; if ($simplehtml != self::CONNECTORS) { $return = sprintf('
', $data['type']); } if (!empty($data['title']) && !empty($data['url'])) { if (!empty($data['image']) && empty($data['text']) && ($data['type'] == 'photo')) { $return .= sprintf('', $data['url'], self::proxyUrl($data['image'], $simplehtml, $uriid), $data['title']); } else { if (!empty($data['image'])) { $return .= sprintf('
', $data['url'], self::proxyUrl($data['image'], $simplehtml, $uriid), $data['title']); } elseif (!empty($data['preview'])) { $return .= sprintf('
', $data['url'], self::proxyUrl($data['preview'], $simplehtml, $uriid), $data['title']); } $return .= sprintf('

%s

', $data['url'], $data['title']); } } if (!empty($data['description']) && $data['description'] != $data['title']) { // Sanitize the HTML $return .= sprintf('
%s
', trim(HTML::purify($data['description']))); } if (!empty($data['provider_url']) && !empty($data['provider_name'])) { if (!empty($data['author_name'])) { $return .= sprintf('%s (%s)', $data['provider_url'], $data['author_name'], $data['provider_name']); } else { $return .= sprintf('%s', $data['provider_url'], $data['provider_name']); } } if ($simplehtml != self::CONNECTORS) { $return .= '
'; } } DI::profiler()->stopRecording(); return trim(($data['text'] ?? '') . ' ' . $return . ' ' . ($data['after'] ?? '')); } public static function removeShareInformation(string $text, bool $plaintext = false, bool $nolink = false): string { DI::profiler()->startRecording('rendering'); $data = self::getAttachmentData($text); if (!$data) { DI::profiler()->stopRecording(); return $text; } elseif ($nolink) { DI::profiler()->stopRecording(); return $data['text'] . ($data['after'] ?? ''); } $title = htmlentities($data['title'] ?? '', ENT_QUOTES, 'UTF-8', false); $text = htmlentities($data['text'], ENT_QUOTES, 'UTF-8', false); if ($plaintext || (($title != '') && strstr($text, $title))) { $data['title'] = $data['url']; } elseif (($text != '') && strstr($title, $text)) { $data['text'] = $data['title']; $data['title'] = $data['url']; } if (empty($data['text']) && !empty($data['title']) && empty($data['url'])) { DI::profiler()->stopRecording(); return $data['title'] . $data['after']; } // If the link already is included in the post, don't add it again if (!empty($data['url']) && strpos($data['text'], $data['url'])) { DI::profiler()->stopRecording(); return $data['text'] . $data['after']; } $text = $data['text']; if (!empty($data['url']) && !empty($data['title'])) { $text .= "\n[url=" . $data['url'] . ']' . $data['title'] . '[/url]'; } elseif (!empty($data['url'])) { $text .= "\n[url]" . $data['url'] . '[/url]'; } DI::profiler()->stopRecording(); return $text . "\n" . $data['after']; } /** * Converts [url] BBCodes in a format that looks fine on Mastodon. (callback function) * * @param array $match Array with the matching values * @return string reformatted link including HTML codes */ private static function convertUrlForActivityPubCallback(array $match): string { $url = $match[1]; if (isset($match[2]) && ($match[1] != $match[2])) { return $match[0]; } $parts = parse_url($url); if (!isset($parts['scheme'])) { return $match[0]; } return self::convertUrlForActivityPub($url); } /** * Converts [url] BBCodes in a format that looks fine on ActivityPub systems. * * @param string $url URL that is about to be reformatted * @return string reformatted link including HTML codes */ private static function convertUrlForActivityPub(string $url): string { return sprintf('%s', $url, self::getStyledURL($url)); } /** * Converts an URL in a nicer format (without the scheme and possibly shortened) * * @param string $url URL that is about to be reformatted * @return string reformatted link */ private static function getStyledURL(string $url): string { $parts = parse_url($url); $scheme = $parts['scheme'] . '://'; $styled_url = str_replace($scheme, '', $url); if (strlen($styled_url) > 30) { $styled_url = substr($styled_url, 0, 30) . "…"; } return $styled_url; } /* * [noparse][i]italic[/i][/noparse] turns into * [noparse][ i ]italic[ /i ][/noparse], * to hide them from parser. * * @param array $match * @return string */ private static function escapeNoparseCallback(array $match): string { $whole_match = $match[0]; $captured = $match[1]; $spacefied = preg_replace("/\[(.*?)\]/", "[ $1 ]", $captured); $new_str = str_replace($captured, $spacefied, $whole_match); return $new_str; } /* * The previously spacefied [noparse][ i ]italic[ /i ][/noparse], * now turns back and the [noparse] tags are trimed * returning [i]italic[/i] * * @param array $match * @return string */ private static function unescapeNoparseCallback(array $match): string { $captured = $match[1]; $unspacefied = preg_replace("/\[ (.*?)\ ]/", "[$1]", $captured); return $unspacefied; } /** * Returns the bracket character positions of a set of opening and closing BBCode tags, optionally skipping first * occurrences * * @param string $text Text to search * @param string $name Tag name * @param int $occurrences Number of first occurrences to skip * @return boolean|array */ public static function getTagPosition(string $text, string $name, int $occurrences = 0) { DI::profiler()->startRecording('rendering'); if ($occurrences < 0) { $occurrences = 0; } $start_open = -1; for ($i = 0; $i <= $occurrences; $i++) { if ($start_open !== false) { $start_open = strpos($text, '[' . $name, $start_open + 1); // allow [name= type tags } } if ($start_open === false) { DI::profiler()->stopRecording(); return false; } $start_equal = strpos($text, '=', $start_open); $start_close = strpos($text, ']', $start_open); if ($start_close === false) { DI::profiler()->stopRecording(); return false; } $start_close++; $end_open = strpos($text, '[/' . $name . ']', $start_close); if ($end_open === false) { DI::profiler()->stopRecording(); return false; } $res = [ 'start' => [ 'open' => $start_open, 'close' => $start_close ], 'end' => [ 'open' => $end_open, 'close' => $end_open + strlen('[/' . $name . ']') ], ]; if ($start_equal !== false) { $res['start']['equal'] = $start_equal + 1; } DI::profiler()->stopRecording(); return $res; } /** * Performs a preg_replace within the boundaries of all named BBCode tags in a text * * @param string $pattern Preg pattern string * @param string $replace Preg replace string * @param string $name BBCode tag name * @param string $text Text to search * @return string */ public static function pregReplaceInTag(string $pattern, string $replace, string $name, string $text): string { DI::profiler()->startRecording('rendering'); $occurrences = 0; $pos = self::getTagPosition($text, $name, $occurrences); while ($pos !== false && $occurrences++ < 1000) { $start = substr($text, 0, $pos['start']['open']); $subject = substr($text, $pos['start']['open'], $pos['end']['close'] - $pos['start']['open']); $end = substr($text, $pos['end']['close']); if ($end === false) { $end = ''; } $subject = preg_replace($pattern, $replace, $subject); $text = $start . $subject . $end; $pos = self::getTagPosition($text, $name, $occurrences); } DI::profiler()->stopRecording(); return $text; } private static function extractImagesFromItemBody(string $body): array { $saved_image = []; $orig_body = $body; $new_body = ''; $cnt = 0; $img_start = strpos($orig_body, '[img'); $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false); $img_end = ($img_start !== false ? strpos(substr($orig_body, $img_start), '[/img]') : false); while (($img_st_close !== false) && ($img_end !== false)) { $img_st_close++; // make it point to AFTER the closing bracket $img_end += $img_start; if (!strcmp(substr($orig_body, $img_start + $img_st_close, 5), 'data:')) { // This is an embedded image $saved_image[$cnt] = substr($orig_body, $img_start + $img_st_close, $img_end - ($img_start + $img_st_close)); $new_body = $new_body . substr($orig_body, 0, $img_start) . '[$#saved_image' . $cnt . '#$]'; $cnt++; } else { $new_body = $new_body . substr($orig_body, 0, $img_end + strlen('[/img]')); } $orig_body = substr($orig_body, $img_end + strlen('[/img]')); if ($orig_body === false) { // in case the body ends on a closing image tag $orig_body = ''; } $img_start = strpos($orig_body, '[img'); $img_st_close = ($img_start !== false ? strpos(substr($orig_body, $img_start), ']') : false); $img_end = ($img_start !== false ? strpos(substr($orig_body, $img_start), '[/img]') : false); } $new_body = $new_body . $orig_body; return ['body' => $new_body, 'images' => $saved_image]; } private static function interpolateSavedImagesIntoItemBody(int $uriid, string $body, array $images): string { $newbody = $body; $cnt = 0; foreach ($images as $image) { // We're depending on the property of 'foreach' (specified on the PHP website) that // it loops over the array starting from the first element and going sequentially // to the last element $newbody = str_replace('[$#saved_image' . $cnt . '#$]', '' . DI::l10n()->t('Image/photo') . '', $newbody); $cnt++; } return $newbody; } /** * @param string $text A BBCode string * @return array Empty array if no share tag is present or the following array, missing attributes end up empty strings: * - comment : Text before the opening share tag * - shared : Text inside the share tags * - author : (Optional) Display name of the shared author * - profile : (Optional) Profile page URL of the shared author * - avatar : (Optional) Profile picture URL of the shared author * - link : (Optional) Canonical URL of the shared post * - posted : (Optional) Date the shared post was initially posted ("Y-m-d H:i:s" in GMT) * - message_id: (Optional) Shared post URI if any * - guid : (Optional) Shared post GUID if any */ public static function fetchShareAttributes(string $text): array { DI::profiler()->startRecording('rendering'); if (preg_match('~(.*?)\[share](.*)\[/share]~ism', $text, $matches)) { DI::profiler()->stopRecording(); return [ 'author' => '', 'profile' => '', 'avatar' => '', 'link' => '', 'posted' => '', 'guid' => '', 'message_id' => trim($matches[2]), 'comment' => trim($matches[1]), 'shared' => '', ]; } // See Issue https://github.com/friendica/friendica/issues/10454 // Hashtags in usernames are expanded to links. This here is a quick fix. $text = preg_replace('~([@!#])\[url=.*?](.*?)\[/url]~ism', '$1$2', $text); if (!preg_match('~(.*?)\[share(.*?)](.*)\[/share]~ism', $text, $matches)) { DI::profiler()->stopRecording(); return []; } $attributes = self::extractShareAttributes($matches[2]); $attributes['comment'] = trim($matches[1]); $attributes['shared'] = trim($matches[3]); DI::profiler()->stopRecording(); return $attributes; } /** * @see BBCode::fetchShareAttributes() * @param string $shareString Internal opening share tag string matched by the regular expression * @return array A fixed attribute array where missing attribute are represented by empty strings */ private static function extractShareAttributes(string $shareString): array { $attributes = []; foreach (['author', 'profile', 'avatar', 'link', 'posted', 'guid', 'message_id'] as $field) { preg_match("/$field=(['\"])(.+?)\\1/ism", $shareString, $matches); $attributes[$field] = html_entity_decode($matches[2] ?? '', ENT_QUOTES, 'UTF-8'); } return $attributes; } /** * Remove the share block * * @param string $body * @return string */ public static function removeSharedData(string $body): string { return trim(preg_replace("/\s*\[share.*?\].*?\[\/share\]\s*/ism", '', $body)); } /** * This function converts a [share] block to text according to a provided callback function whose signature is: * * function(array $attributes, array $author_contact, string $content, boolean $is_quote_share): string * * Where: * - $attributes is an array of attributes of the [share] block itself. Missing keys will be completed by the contact * data lookup * - $author_contact is a contact record array * - $content is the inner content of the [share] block * - $is_quote_share indicates whether there's any content before the [share] block * - Return value is the string that should replace the [share] block in the provided text * * This function is intended to be used by addon connector to format a share block like the target network is expecting it. * * @param string $text A BBCode string * @param callable $callback * @return string The BBCode string with all [share] blocks replaced */ public static function convertShare(string $text, callable $callback, int $uriid = 0): string { DI::profiler()->startRecording('rendering'); $return = preg_replace_callback( '~(.*?)\[share(.*?)](.*)\[/share]~ism', function ($match) use ($callback, $uriid) { $attributes = self::extractShareAttributes($match[2]); $author_contact = Contact::getByURL($attributes['profile'], false, ['id', 'url', 'addr', 'name', 'micro']); $author_contact['url'] = ($author_contact['url'] ?? $attributes['profile']); $author_contact['addr'] = ($author_contact['addr'] ?? ''); $attributes['author'] = ($author_contact['name'] ?? '') ?: $attributes['author']; $attributes['avatar'] = ($author_contact['micro'] ?? '') ?: $attributes['avatar']; $attributes['profile'] = ($author_contact['url'] ?? '') ?: $attributes['profile']; if (!empty($author_contact['id'])) { $attributes['avatar'] = Contact::getAvatarUrlForId($author_contact['id'], Proxy::SIZE_THUMB); } elseif ($attributes['avatar']) { $attributes['avatar'] = self::proxyUrl($attributes['avatar'], self::INTERNAL, $uriid, Proxy::SIZE_THUMB); } $content = preg_replace(Strings::autoLinkRegEx(), '$1', $match[3]); return $match[1] . $callback($attributes, $author_contact, $content, trim($match[1]) != ''); }, $text ); DI::profiler()->stopRecording(); return trim($return); } /** * Convert complex IMG and ZMG elements * * @param [type] $text * @param integer $simplehtml * @param integer $uriid * @return string */ private static function convertImages(string $text, int $simplehtml, int $uriid = 0): string { DI::profiler()->startRecording('rendering'); $return = preg_replace_callback( "/\[[zi]mg(.*?)\]([^\[\]]*)\[\/[zi]mg\]/ism", function ($match) use ($simplehtml, $uriid) { $attribute_string = $match[1]; $attributes = []; foreach (['alt', 'width', 'height'] as $field) { preg_match("/$field=(['\"])(.+?)\\1/ism", $attribute_string, $matches); $attributes[$field] = html_entity_decode($matches[2] ?? '', ENT_QUOTES, 'UTF-8'); } $img_str = ' $value) { if (!empty($value)) { $img_str .= ' ' . $key . '="' . htmlspecialchars($value, ENT_COMPAT) . '"'; } } return $img_str . '>'; }, $text ); DI::profiler()->stopRecording(); return $return; } /** * Default [share] tag conversion callback * * Note: Can produce a [bookmark] tag in the output * * @see BBCode::convertShare() * @param array $attributes [share] block attribute values * @param array $author_contact Contact row of the shared author * @param string $content Inner content of the [share] block * @param boolean $is_quote_share Whether there is content before the [share] block * @param integer $simplehtml Mysterious integer value depending on the target network/formatting style * @return string * @throws \Friendica\Network\HTTPException\InternalServerErrorException */ private static function convertShareCallback(array $attributes, array $author_contact, string $content, bool $is_quote_share, int $simplehtml): string { DI::profiler()->startRecording('rendering'); $mention = $attributes['author'] . ' (' . ($author_contact['addr'] ?? '') . ')'; switch ($simplehtml) { case self::API: $text = ($is_quote_share? '
' : '') . '' . html_entity_decode('♲', ENT_QUOTES, 'UTF-8') . ' ' . $author_contact['addr'] . ":
\n" . '
' . $content . '
'; break; case self::DIASPORA: if (stripos(Strings::normaliseLink($attributes['link']), 'http://twitter.com/') === 0) { $text = ($is_quote_share? '
' : '') . '

' . $attributes['link'] . '

' . "\n"; } else { $headline = '

' . $attributes['author'] . ':

' . "\n"; if (!empty($attributes['posted']) && !empty($attributes['link'])) { $headline = '

' . $attributes['author'] . ' - ' . $attributes['posted'] . ' GMT

' . "\n"; } $text = ($is_quote_share? '
' : '') . $headline . '
' . trim($content) . '
' . "\n"; if (empty($attributes['posted']) && !empty($attributes['link'])) { $text .= '

[Source]

' . "\n"; } } break; case self::CONNECTORS: $headline = '

' . html_entity_decode('♲ ', ENT_QUOTES, 'UTF-8'); $headline .= DI::l10n()->t('%2$s %3$s', $attributes['link'], $mention, $attributes['posted']); $headline .= ':

' . "\n"; $text = ($is_quote_share? '
' : '') . $headline . '
' . trim($content) . '
' . "\n"; break; case self::OSTATUS: $text = ($is_quote_share? '
' : '') . '

' . html_entity_decode('♲ ', ENT_QUOTES, 'UTF-8') . ' @' . $author_contact['addr'] . ': ' . $content . '

' . "\n"; break; case self::ACTIVITYPUB: $author = '@' . $author_contact['addr'] . ':'; $text = '
' . html_entity_decode('♲', ENT_QUOTES, 'UTF-8') . ' ' . $author . '
' . $content . '
' . "\n"; break; default: $text = ($is_quote_share? "\n" : ''); $contact = Contact::getByURL($attributes['profile'], false, ['network']); $network = $contact['network'] ?? Protocol::PHANTOM; $tpl = Renderer::getMarkupTemplate('shared_content.tpl'); $text .= Renderer::replaceMacros($tpl, [ '$profile' => $attributes['profile'], '$avatar' => $attributes['avatar'], '$author' => $attributes['author'], '$link' => $attributes['link'], '$link_title' => DI::l10n()->t('Link to source'), '$posted' => $attributes['posted'], '$guid' => $attributes['guid'], '$network_name' => ContactSelector::networkToName($network, $attributes['profile']), '$network_icon' => ContactSelector::networkToIcon($network, $attributes['profile']), '$content' => self::TOP_ANCHOR . self::setMentions(trim($content), 0, $network) . self::BOTTOM_ANCHOR, ]); break; } return $text; } private static function removePictureLinksCallback(array $match): string { $cache_key = 'remove:' . $match[1]; $text = DI::cache()->get($cache_key); if (is_null($text)) { $curlResult = DI::httpClient()->head($match[1], [HttpClientOptions::TIMEOUT => DI::config()->get('system', 'xrd_timeout')]); if ($curlResult->isSuccess()) { $mimetype = $curlResult->getHeader('Content-Type')[0] ?? ''; } else { $mimetype = ''; } if (substr($mimetype, 0, 6) == 'image/') { $text = '[url=' . $match[1] . ']' . $match[1] . '[/url]'; } else { $text = '[url=' . $match[2] . ']' . $match[2] . '[/url]'; // if its not a picture then look if its a page that contains a picture link $body = DI::httpClient()->fetch($match[1], HttpClientAccept::HTML, 0); if (empty($body)) { DI::cache()->set($cache_key, $text); return $text; } $doc = new DOMDocument(); @$doc->loadHTML($body); $xpath = new DOMXPath($doc); $list = $xpath->query('//meta[@name]'); foreach ($list as $node) { $attr = []; if ($node->attributes->length) { foreach ($node->attributes as $attribute) { $attr[$attribute->name] = $attribute->value; } } if (strtolower($attr['name']) == 'twitter:image') { $text = '[url=' . $attr['content'] . ']' . $attr['content'] . '[/url]'; } } } DI::cache()->set($cache_key, $text); } return $text; } /** * Callback: Expands links from given $match array * * @param array $match Array with link match * @return string BBCode */ private static function expandLinksCallback(array $match): string { if (($match[3] == '') || ($match[2] == $match[3]) || stristr($match[2], $match[3])) { return ($match[1] . '[url]' . $match[2] . '[/url]'); } else { return ($match[1] . $match[3] . ' [url]' . $match[2] . '[/url]'); } } /** * Callback: Cleans picture links * * @param array $match Array with link match * @return string BBCode */ private static function cleanPictureLinksCallback(array $match): string { // When the picture link is the own photo path then we can avoid fetching the link $own_photo_url = preg_quote(Strings::normaliseLink(DI::baseUrl()->get()) . '/photos/'); if (preg_match('|' . $own_photo_url . '.*?/image/|', Strings::normaliseLink($match[1]))) { if (!empty($match[3])) { $text = '[img=' . str_replace('-1.', '-0.', $match[2]) . ']' . $match[3] . '[/img]'; } else { $text = '[img]' . str_replace('-1.', '-0.', $match[2]) . '[/img]'; } return $text; } $cache_key = 'clean:' . $match[1]; $text = DI::cache()->get($cache_key); if (!is_null($text)) { return $text; } $curlResult = DI::httpClient()->head($match[1], [HttpClientOptions::TIMEOUT => DI::config()->get('system', 'xrd_timeout')]); if ($curlResult->isSuccess()) { $mimetype = $curlResult->getHeader('Content-Type')[0] ?? ''; } else { $mimetype = ''; } // if its a link to a picture then embed this picture if (substr($mimetype, 0, 6) == 'image/') { $text = '[img]' . $match[1] . '[/img]'; } else { if (!empty($match[3])) { $text = '[img=' . $match[2] . ']' . $match[3] . '[/img]'; } else { $text = '[img]' . $match[2] . '[/img]'; } // if its not a picture then look if its a page that contains a picture link $body = DI::httpClient()->fetch($match[1], HttpClientAccept::HTML, 0); if (empty($body)) { DI::cache()->set($cache_key, $text); return $text; } $doc = new DOMDocument(); @$doc->loadHTML($body); $xpath = new DOMXPath($doc); $list = $xpath->query('//meta[@name]'); foreach ($list as $node) { $attr = []; if ($node->attributes->length) { foreach ($node->attributes as $attribute) { $attr[$attribute->name] = $attribute->value; } } if (strtolower($attr['name']) == "twitter:image") { if (!empty($match[3])) { $text = "[img=" . $attr['content'] . "]" . $match[3] . "[/img]"; } else { $text = "[img]" . $attr['content'] . "[/img]"; } } } } DI::cache()->set($cache_key, $text); return $text; } /** * Cleans picture links * * @param string $text HTML/BBCode string * @return string Cleaned HTML/BBCode */ public static function cleanPictureLinks(string $text): string { DI::profiler()->startRecording('rendering'); $return = preg_replace_callback("&\[url=([^\[\]]*)\]\[img=(.*)\](.*)\[\/img\]\[\/url\]&Usi", 'self::cleanPictureLinksCallback', $text); $return = preg_replace_callback("&\[url=([^\[\]]*)\]\[img\](.*)\[\/img\]\[\/url\]&Usi", 'self::cleanPictureLinksCallback', $return); DI::profiler()->stopRecording(); return $return; } /** * Removes links * * @param string $text HTML/BBCode string * @return string Cleaned HTML/BBCode */ public static function removeLinks(string $bbcode): string { DI::profiler()->startRecording('rendering'); $bbcode = preg_replace("/\[img\=(.*?)\](.*?)\[\/img\]/ism", ' $1 ', $bbcode); $bbcode = preg_replace("/\[img.*?\[\/img\]/ism", ' ', $bbcode); $bbcode = preg_replace('/[@!#]\[url\=.*?\].*?\[\/url\]/ism', '', $bbcode); $bbcode = preg_replace("/\[url=[^\[\]]*\](.*)\[\/url\]/Usi", ' $1 ', $bbcode); $bbcode = preg_replace('/[@!#]?\[url.*?\[\/url\]/ism', '', $bbcode); DI::profiler()->stopRecording(); return $bbcode; } /** * Replace names in mentions with nicknames * * @param string $body HTML/BBCode * @return string Body with replaced mentions */ public static function setMentionsToNicknames(string $body): string { DI::profiler()->startRecording('rendering'); $regexp = "/([@!])\[url\=([^\[\]]*)\].*?\[\/url\]/ism"; $body = preg_replace_callback($regexp, ['self', 'mentionCallback'], $body); DI::profiler()->stopRecording(); return $body; } /** * Callback function to replace a Friendica style mention in a mention with the nickname * * @param array $match Matching values for the callback * @return string Replaced mention or empty string * @throws \Friendica\Network\HTTPException\InternalServerErrorException */ private static function mentionCallback(array $match): string { if (empty($match[2])) { return ''; } $data = Contact::getByURL($match[2], false, ['url', 'nick']); if (empty($data['nick'])) { return $match[0]; } return $match[1] . '[url=' . $data['url'] . ']' . $data['nick'] . '[/url]'; } /** * Converts a BBCode message for a given URI-ID to a HTML message * * BBcode 2 HTML was written by WAY2WEB.net * extended to work with Mistpark/Friendica - Mike Macgirvin * * Simple HTML values meaning: * - 0: Friendica display * - 1: Unused * - 2: Used for Windows Phone push, Friendica API * - 3: Used before converting to Markdown in bb2diaspora.php * - 4: Used for WordPress, Libertree (before Markdown), pump.io and tumblr * - 5: Unused * - 6: Unused * - 7: Used for dfrn, OStatus * - 8: Used for Twitter, WP backlink text setting * - 9: ActivityPub * * @param int $uriid * @param string $text * @param int $simple_html * @return string * @throws \Friendica\Network\HTTPException\InternalServerErrorException */ public static function convertForUriId(int $uriid = null, string $text = null, int $simple_html = self::INTERNAL): string { $try_oembed = ($simple_html == self::INTERNAL); return self::convert($text ?? '', $try_oembed, $simple_html, false, $uriid ?? 0); } /** * Converts a BBCode message to HTML message * * BBcode 2 HTML was written by WAY2WEB.net * extended to work with Mistpark/Friendica - Mike Macgirvin * * Simple HTML values meaning: * - 0: Friendica display * - 1: Unused * - 2: Used for Windows Phone push, Friendica API * - 3: Used before converting to Markdown in bb2diaspora.php * - 4: Used for WordPress, Libertree (before Markdown), pump.io and tumblr * - 5: Unused * - 6: Unused * - 7: Used for dfrn, OStatus * - 8: Used for Twitter, WP backlink text setting * - 9: ActivityPub * * @param string $text * @param bool $try_oembed * @param int $simple_html * @param bool $for_plaintext * @param int $uriid * @return string Converted code or empty string * @throws \Friendica\Network\HTTPException\InternalServerErrorException */ public static function convert(string $text = null, bool $try_oembed = true, int $simple_html = self::INTERNAL, bool $for_plaintext = false, int $uriid = 0): string { // Accounting for null default column values if (is_null($text) || $text === '') { return ''; } DI::profiler()->startRecording('rendering'); Hook::callAll('bbcode', $text); $a = DI::app(); $text = self::performWithEscapedTags($text, ['code'], function ($text) use ($try_oembed, $simple_html, $for_plaintext, $a, $uriid) { $text = self::performWithEscapedTags($text, ['noparse', 'nobb', 'pre'], function ($text) use ($try_oembed, $simple_html, $for_plaintext, $a, $uriid) { /* * preg_match_callback function to replace potential Oembed tags with Oembed content * * $match[0] = [tag]$url[/tag] or [tag=$url]$title[/tag] * $match[1] = $url * $match[2] = $title or absent */ $try_oembed_callback = function (array $match) { $url = $match[1]; $title = $match[2] ?? ''; try { $return = OEmbed::getHTML($url, $title); } catch (Exception $ex) { $return = $match[0]; } return $return; }; // Remove the abstract element. It is a non visible element. $text = self::stripAbstract($text); // Line ending normalisation $text = str_replace("\r\n", "\n", $text); // Move new lines outside of tags $text = preg_replace("#\[(\w*)](\n*)#ism", '$2[$1]', $text); $text = preg_replace("#(\n*)\[/(\w*)]#ism", '[/$2]$1', $text); // Extract the private images which use data urls since preg has issues with // large data sizes. Stash them away while we do bbcode conversion, and then put them back // in after we've done all the regex matching. We cannot use any preg functions to do this. $extracted = self::extractImagesFromItemBody($text); $text = $extracted['body']; $saved_image = $extracted['images']; // If we find any event code, turn it into an event. // After we're finished processing the bbcode we'll // replace all of the event code with a reformatted version. $ev = Event::fromBBCode($text); // Replace any html brackets with HTML Entities to prevent executing HTML or script // Don't use strip_tags here because it breaks [url] search by replacing & with amp $text = str_replace("<", "<", $text); $text = str_replace(">", ">", $text); // remove some newlines before the general conversion $text = preg_replace("/\s?\[share(.*?)\]\s?(.*?)\s?\[\/share\]\s?/ism", "[share$1]$2[/share]", $text); $text = preg_replace("/\s?\[quote(.*?)\]\s?(.*?)\s?\[\/quote\]\s?/ism", "[quote$1]$2[/quote]", $text); // when the content is meant exporting to other systems then remove the avatar picture since this doesn't really look good on these systems if (!$try_oembed) { $text = preg_replace("/\[share(.*?)avatar\s?=\s?'.*?'\s?(.*?)\]\s?(.*?)\s?\[\/share\]\s?/ism", "\n[share$1$2]$3[/share]", $text); } // Remove linefeeds inside of the table elements. See issue #6799 $search = ["\n[th]", "[th]\n", " [th]", "\n[/th]", "[/th]\n", "[/th] ", "\n[td]", "[td]\n", " [td]", "\n[/td]", "[/td]\n", "[/td] ", "\n[tr]", "[tr]\n", " [tr]", "[tr] ", "\n[/tr]", "[/tr]\n", " [/tr]", "[/tr] ", "\n[hr]", "[hr]\n", " [hr]", "[hr] ", "\n[attachment ", " [attachment ", "\n[/attachment]", "[/attachment]\n", " [/attachment]", "[/attachment] ", "[table]\n", "[table] ", " [table]", "\n[/table]", " [/table]", "[/table] "]; $replace = ["[th]", "[th]", "[th]", "[/th]", "[/th]", "[/th]", "[td]", "[td]", "[td]", "[/td]", "[/td]", "[/td]", "[tr]", "[tr]", "[tr]", "[tr]", "[/tr]", "[/tr]", "[/tr]", "[/tr]", "[hr]", "[hr]", "[hr]", "[hr]", "[attachment ", "[attachment ", "[/attachment]", "[/attachment]", "[/attachment]", "[/attachment]", "[table]", "[table]", "[table]", "[/table]", "[/table]", "[/table]"]; do { $oldtext = $text; $text = str_replace($search, $replace, $text); } while ($oldtext != $text); // Replace these here only once $search = ["\n[table]", "[/table]\n"]; $replace = ["[table]", "[/table]"]; $text = str_replace($search, $replace, $text); // Trim new lines regardless of the system.remove_multiplicated_lines config value $text = trim($text, "\n"); // removing multiplicated newlines if (DI::config()->get('system', 'remove_multiplicated_lines')) { $search = ["\n\n\n", "\n ", " \n", "[/quote]\n\n", "\n[/quote]", "[/li]\n", "\n[li]", "\n[*]", "\n[ul]", "[/ul]\n", "\n\n[share ", "[/attachment]\n", "\n[h1]", "[/h1]\n", "\n[h2]", "[/h2]\n", "\n[h3]", "[/h3]\n", "\n[h4]", "[/h4]\n", "\n[h5]", "[/h5]\n", "\n[h6]", "[/h6]\n"]; $replace = ["\n\n", "\n", "\n", "[/quote]\n", "[/quote]", "[/li]", "[li]", "[*]", "[ul]", "[/ul]", "\n[share ", "[/attachment]", "[h1]", "[/h1]", "[h2]", "[/h2]", "[h3]", "[/h3]", "[h4]", "[/h4]", "[h5]", "[/h5]", "[h6]", "[/h6]"]; do { $oldtext = $text; $text = str_replace($search, $replace, $text); } while ($oldtext != $text); } /// @todo Have a closer look at the different html modes // Handle attached links or videos if (in_array($simple_html, [self::API, self::ACTIVITYPUB])) { $text = self::removeAttachment($text); } elseif (!in_array($simple_html, [self::INTERNAL, self::EXTERNAL, self::CONNECTORS])) { $text = self::removeAttachment($text, true); } else { $text = self::convertAttachment($text, $simple_html, $try_oembed, [], $uriid); } $nosmile = strpos($text, '[nosmile]') !== false; $text = str_replace('[nosmile]', '', $text); // Replace non graphical smilies for external posts if (!$nosmile) { $text = self::performWithEscapedTags($text, ['img'], function ($text) use ($simple_html, $for_plaintext) { return Smilies::replace($text, ($simple_html != self::INTERNAL) || $for_plaintext); }); } // leave open the posibility of [map=something] // this is replaced in Item::prepareBody() which has knowledge of the item location if (strpos($text, '[/map]') !== false) { $text = preg_replace_callback( "/\[map\](.*?)\[\/map\]/ism", function ($match) use ($simple_html) { return str_replace($match[0], '

' . Map::byLocation($match[1], $simple_html) . '

', $match[0]); }, $text ); } if (strpos($text, '[map=') !== false) { $text = preg_replace_callback( "/\[map=(.*?)\]/ism", function ($match) use ($simple_html) { return str_replace($match[0], '

' . Map::byCoordinates(str_replace('/', ' ', $match[1]), $simple_html) . '

', $match[0]); }, $text ); } if (strpos($text, '[map]') !== false) { $text = preg_replace("/\[map\]/", '

', $text); } // Check for headers $text = preg_replace("(\[h1\](.*?)\[\/h1\])ism", '

$1

', $text); $text = preg_replace("(\[h2\](.*?)\[\/h2\])ism", '

$1

', $text); $text = preg_replace("(\[h3\](.*?)\[\/h3\])ism", '

$1

', $text); $text = preg_replace("(\[h4\](.*?)\[\/h4\])ism", '

$1

', $text); $text = preg_replace("(\[h5\](.*?)\[\/h5\])ism", '
$1
', $text); $text = preg_replace("(\[h6\](.*?)\[\/h6\])ism", '
$1
', $text); // Check for paragraph $text = preg_replace("(\[p\](.*?)\[\/p\])ism", '

$1

', $text); // Check for bold text $text = preg_replace("(\[b\](.*?)\[\/b\])ism", '$1', $text); // Check for Italics text $text = preg_replace("(\[i\](.*?)\[\/i\])ism", '$1', $text); // Check for Underline text $text = preg_replace("(\[u\](.*?)\[\/u\])ism", '$1', $text); // Check for strike-through text $text = preg_replace("(\[s\](.*?)\[\/s\])ism", '$1', $text); // Check for over-line text $text = preg_replace("(\[o\](.*?)\[\/o\])ism", '$1', $text); // Check for colored text $text = preg_replace("(\[color=(.*?)\](.*?)\[\/color\])ism", "$2", $text); // Check for sized text // [size=50] --> font-size: 50px (with the unit). if ($simple_html != self::DIASPORA) { $text = preg_replace("(\[size=(\d*?)\](.*?)\[\/size\])ism", '$2', $text); $text = preg_replace("(\[size=(.*?)\](.*?)\[\/size\])ism", '$2', $text); } else { // Issue 2199: Diaspora doesn't interpret the construct above, nor the or element $text = preg_replace("(\[size=(.*?)\](.*?)\[\/size\])ism", "$2", $text); } // Check for centered text $text = preg_replace("(\[center\](.*?)\[\/center\])ism", '
$1
', $text); // Check for list text $text = str_replace("[*]", "
  • ", $text); // Check for block-level custom CSS $text = preg_replace('#(?<=^|\n)\[style=(.*?)](.*?)\[/style](?:\n|$)#ism', '
    $2
    ', $text); // Check for inline custom CSS $text = preg_replace("(\[style=(.*?)\](.*?)\[\/style\])ism", '$2', $text); // Mastodon Emoji (internal tag, do not document for users) $text = preg_replace("(\[emoji=(.*?)](.*?)\[/emoji])ism", '$2', $text); // Check for CSS classes // @deprecated since 2021.12, left for backward-compatibility reasons $text = preg_replace("(\[class=(.*?)\](.*?)\[\/class\])ism", '$2', $text); // Add HTML new lines $text = str_replace("\n", '
    ', $text); // handle nested lists $endlessloop = 0; while ((((strpos($text, "[/list]") !== false) && (strpos($text, "[list") !== false)) || ((strpos($text, "[/ol]") !== false) && (strpos($text, "[ol]") !== false)) || ((strpos($text, "[/ul]") !== false) && (strpos($text, "[ul]") !== false)) || ((strpos($text, "[/li]") !== false) && (strpos($text, "[li]") !== false))) && (++$endlessloop < 20)) { $text = preg_replace("/\[list\](.*?)\[\/list\]/ism", '
      $1
    ', $text); $text = preg_replace("/\[list=\](.*?)\[\/list\]/ism", '
      $1
    ', $text); $text = preg_replace("/\[list=1\](.*?)\[\/list\]/ism", '
      $1
    ', $text); $text = preg_replace("/\[list=((?-i)i)\](.*?)\[\/list\]/ism", '
      $2
    ', $text); $text = preg_replace("/\[list=((?-i)I)\](.*?)\[\/list\]/ism", '
      $2
    ', $text); $text = preg_replace("/\[list=((?-i)a)\](.*?)\[\/list\]/ism", '
      $2
    ', $text); $text = preg_replace("/\[list=((?-i)A)\](.*?)\[\/list\]/ism", '
      $2
    ', $text); $text = preg_replace("/\[ul\](.*?)\[\/ul\]/ism", '
      $1
    ', $text); $text = preg_replace("/\[ol\](.*?)\[\/ol\]/ism", '
      $1
    ', $text); $text = preg_replace("/\[li\](.*?)\[\/li\]/ism", '
  • $1
  • ', $text); } $text = preg_replace("/\[th\](.*?)\[\/th\]/sm", '$1', $text); $text = preg_replace("/\[td\](.*?)\[\/td\]/sm", '$1', $text); $text = preg_replace("/\[tr\](.*?)\[\/tr\]/sm", '$1', $text); $text = preg_replace("/\[table\](.*?)\[\/table\]/sm", '$1
    ', $text); $text = preg_replace("/\[table border=1\](.*?)\[\/table\]/sm", '$1
    ', $text); $text = preg_replace("/\[table border=0\](.*?)\[\/table\]/sm", '$1
    ', $text); $text = str_replace('[hr]', '
    ', $text); if (!$for_plaintext) { $text = self::performWithEscapedTags($text, ['url', 'img', 'audio', 'video', 'youtube', 'vimeo', 'share', 'attachment', 'iframe', 'bookmark'], function ($text) { return preg_replace(Strings::autoLinkRegEx(), '[url]$1[/url]', $text); }); } // Check for font change text $text = preg_replace("/\[font=(.*?)\](.*?)\[\/font\]/sm", "$2", $text); // Declare the format for [spoiler] layout $SpoilerLayout = '
    ' . DI::l10n()->t('Click to open/close') . '$1
    '; // Check for [spoiler] text // handle nested quotes $endlessloop = 0; while ((strpos($text, "[/spoiler]") !== false) && (strpos($text, "[spoiler]") !== false) && (++$endlessloop < 20)) { $text = preg_replace("/\[spoiler\](.*?)\[\/spoiler\]/ism", $SpoilerLayout, $text); } // Check for [spoiler=Title] text // handle nested quotes $endlessloop = 0; while ((strpos($text, "[/spoiler]")!== false) && (strpos($text, "[spoiler=") !== false) && (++$endlessloop < 20)) { $text = preg_replace("/\[spoiler=[\"\']*(.*?)[\"\']*\](.*?)\[\/spoiler\]/ism", '
    $1$2
    ', $text); } // Declare the format for [quote] layout $QuoteLayout = '
    $1
    '; // Check for [quote] text // handle nested quotes $endlessloop = 0; while ((strpos($text, "[/quote]") !== false) && (strpos($text, "[quote]") !== false) && (++$endlessloop < 20)) { $text = preg_replace("/\[quote\](.*?)\[\/quote\]/ism", "$QuoteLayout", $text); } // Check for [quote=Author] text $t_wrote = DI::l10n()->t('$1 wrote:'); // handle nested quotes $endlessloop = 0; while ((strpos($text, "[/quote]")!== false) && (strpos($text, "[quote=") !== false) && (++$endlessloop < 20)) { $text = preg_replace("/\[quote=[\"\']*(.*?)[\"\']*\](.*?)\[\/quote\]/ism", "

    " . $t_wrote . "

    $2
    ", $text); } // [img=widthxheight]image source[/img] $text = preg_replace_callback( "/\[img\=([0-9]*)x([0-9]*)\](.*?)\[\/img\]/ism", function ($matches) use ($simple_html, $uriid) { if (strpos($matches[3], "data:image/") === 0) { return $matches[0]; } $matches[3] = self::proxyUrl($matches[3], $simple_html, $uriid); return "[img=" . $matches[1] . "x" . $matches[2] . "]" . $matches[3] . "[/img]"; }, $text ); $text = preg_replace("/\[img\=([0-9]*)x([0-9]*)\](.*?)\[\/img\]/ism", '', $text); $text = preg_replace("/\[zmg\=([0-9]*)x([0-9]*)\](.*?)\[\/zmg\]/ism", '', $text); $text = preg_replace_callback("/\[img\=(.*?)\](.*?)\[\/img\]/ism", function ($matches) use ($simple_html, $uriid) { $matches[1] = self::proxyUrl($matches[1], $simple_html, $uriid); $matches[2] = htmlspecialchars($matches[2], ENT_COMPAT); return '' . $matches[2] . ''; }, $text); // Images // [img]pathtoimage[/img] $text = preg_replace_callback( "/\[img\](.*?)\[\/img\]/ism", function ($matches) use ($simple_html, $uriid) { if (strpos($matches[1], "data:image/") === 0) { return $matches[0]; } $matches[1] = self::proxyUrl($matches[1], $simple_html, $uriid); return "[img]" . $matches[1] . "[/img]"; }, $text ); $text = preg_replace("/\[img\](.*?)\[\/img\]/ism", '' . DI::l10n()->t('Image/photo') . '', $text); $text = preg_replace("/\[zmg\](.*?)\[\/zmg\]/ism", '' . DI::l10n()->t('Image/photo') . '', $text); $text = self::convertImages($text, $simple_html, $uriid); $text = preg_replace("/\[crypt\](.*?)\[\/crypt\]/ism", '
    ' . DI::l10n()->t('Encrypted content') . '
    ', $text); $text = preg_replace("/\[crypt(.*?)\](.*?)\[\/crypt\]/ism", '
    ' . DI::l10n()->t('Encrypted content') . '
    ', $text); //$text = preg_replace("/\[crypt=(.*?)\](.*?)\[\/crypt\]/ism", '
    ' . DI::l10n()->t('Encrypted content') . '
    ', $text); // Simplify "video" element $text = preg_replace('(\[video[^\]]*?\ssrc\s?=\s?([^\s\]]+)[^\]]*?\].*?\[/video\])ism', '[video]$1[/video]', $text); if ($try_oembed) { // html5 video and audio $text = preg_replace("/\[video\](.*?\.(ogg|ogv|oga|ogm|webm|mp4).*?)\[\/video\]/ism", '', $text); $text = preg_replace_callback("/\[video\](.*?)\[\/video\]/ism", $try_oembed_callback, $text); $text = preg_replace_callback("/\[audio\](.*?)\[\/audio\]/ism", $try_oembed_callback, $text); $text = preg_replace("/\[video\](.*?)\[\/video\]/ism", '$1', $text); $text = preg_replace("/\[audio\](.*?)\[\/audio\]/ism", '', $text); } else { $text = preg_replace("/\[video\](.*?)\[\/video\]/ism", '$1', $text); $text = preg_replace("/\[audio\](.*?)\[\/audio\]/ism", '$1', $text); } // Backward compatibility, [iframe] support has been removed in version 2020.12 $text = preg_replace("/\[iframe\](.*?)\[\/iframe\]/ism", '$1', $text); // Youtube extensions if ($try_oembed) { $text = preg_replace_callback("/\[youtube\](https?:\/\/www.youtube.com\/watch\?v\=.*?)\[\/youtube\]/ism", $try_oembed_callback, $text); $text = preg_replace_callback("/\[youtube\](www.youtube.com\/watch\?v\=.*?)\[\/youtube\]/ism", $try_oembed_callback, $text); $text = preg_replace_callback("/\[youtube\](https?:\/\/www.youtube.com\/shorts\/.*?)\[\/youtube\]/ism", $try_oembed_callback, $text); $text = preg_replace_callback("/\[youtube\](https?:\/\/youtu.be\/.*?)\[\/youtube\]/ism", $try_oembed_callback, $text); } $text = preg_replace("/\[youtube\]https?:\/\/www.youtube.com\/watch\?v\=(.*?)\[\/youtube\]/ism", '[youtube]$1[/youtube]', $text); $text = preg_replace("/\[youtube\]https?:\/\/www.youtube.com\/embed\/(.*?)\[\/youtube\]/ism", '[youtube]$1[/youtube]', $text); $text = preg_replace("/\[youtube\]https?:\/\/www.youtube.com\/shorts\/(.*?)\[\/youtube\]/ism", '[youtube]$1[/youtube]', $text); $text = preg_replace("/\[youtube\]https?:\/\/youtu.be\/(.*?)\[\/youtube\]/ism", '[youtube]$1[/youtube]', $text); if ($try_oembed) { $text = preg_replace("/\[youtube\]([A-Za-z0-9\-_=]+)(.*?)\[\/youtube\]/ism", '', $text); } else { $text = preg_replace("/\[youtube\]([A-Za-z0-9\-_=]+)(.*?)\[\/youtube\]/ism", 'https://www.youtube.com/watch?v=$1', $text); } if ($try_oembed) { $text = preg_replace_callback("/\[vimeo\](https?:\/\/player.vimeo.com\/video\/[0-9]+).*?\[\/vimeo\]/ism", $try_oembed_callback, $text); $text = preg_replace_callback("/\[vimeo\](https?:\/\/vimeo.com\/[0-9]+).*?\[\/vimeo\]/ism", $try_oembed_callback, $text); } $text = preg_replace("/\[vimeo\]https?:\/\/player.vimeo.com\/video\/([0-9]+)(.*?)\[\/vimeo\]/ism", '[vimeo]$1[/vimeo]', $text); $text = preg_replace("/\[vimeo\]https?:\/\/vimeo.com\/([0-9]+)(.*?)\[\/vimeo\]/ism", '[vimeo]$1[/vimeo]', $text); if ($try_oembed) { $text = preg_replace("/\[vimeo\]([0-9]+)(.*?)\[\/vimeo\]/ism", '', $text); } else { $text = preg_replace("/\[vimeo\]([0-9]+)(.*?)\[\/vimeo\]/ism", 'https://vimeo.com/$1', $text); } // oembed tag $text = OEmbed::BBCode2HTML($text); // Avoid triple linefeeds through oembed $text = str_replace("


    ", "

    ", $text); // If we found an event earlier, strip out all the event code and replace with a reformatted version. // Replace the event-start section with the entire formatted event. The other bbcode is stripped. // Summary (e.g. title) is required, earlier revisions only required description (in addition to // start which is always required). Allow desc with a missing summary for compatibility. if ((!empty($ev['desc']) || !empty($ev['summary'])) && !empty($ev['start'])) { $sub = Event::getHTML($ev, $simple_html, $uriid); $text = preg_replace("/\[event\-summary\](.*?)\[\/event\-summary\]/ism", '', $text); $text = preg_replace("/\[event\-description\](.*?)\[\/event\-description\]/ism", '', $text); $text = preg_replace("/\[event\-start\](.*?)\[\/event\-start\]/ism", $sub, $text); $text = preg_replace("/\[event\-finish\](.*?)\[\/event\-finish\]/ism", '', $text); $text = preg_replace("/\[event\-location\](.*?)\[\/event\-location\]/ism", '', $text); $text = preg_replace("/\[event\-id\](.*?)\[\/event\-id\]/ism", '', $text); } if (!$for_plaintext && DI::config()->get('system', 'big_emojis') && ($simple_html != self::DIASPORA)) { $conv = html_entity_decode(str_replace([' ', "\n", "\r"], '', $text)); // Emojis are always 4 byte Unicode characters if (!empty($conv) && (strlen($conv) / mb_strlen($conv) == 4)) { $text = '' . $text . ''; } } // Handle mentions and hashtag links if ($simple_html == self::DIASPORA) { // The ! is converted to @ since Diaspora only understands the @ $text = preg_replace("/([@!])\[url\=(.*?)\](.*?)\[\/url\]/ism", '@$3', $text); } elseif (in_array($simple_html, [self::OSTATUS, self::ACTIVITYPUB])) { $text = preg_replace("/([@!])\[url\=(.*?)\](.*?)\[\/url\]/ism", '$1$3', $text); $text = preg_replace("/([#])\[url\=(.*?)\](.*?)\[\/url\]/ism", '', $text); } elseif (in_array($simple_html, [self::INTERNAL, self::EXTERNAL])) { $text = preg_replace("/([@!])\[url\=(.*?)\](.*?)\[\/url\]/ism", '$1$3', $text); $text = preg_replace("/([#])\[url\=(.*?)\](.*?)\[\/url\]/ism", '', $text); } elseif ($simple_html == self::API) { $text = preg_replace("/([@!])\[url\=(.*?)\](.*?)\[\/url\]/ism", '$1$3', $text); $text = preg_replace("/([#])\[url\=(.*?)\](.*?)\[\/url\]/ism", '', $text); } else { $text = preg_replace("/([#@!])\[url\=(.*?)\](.*?)\[\/url\]/ism", '$1$3', $text); } if (!$for_plaintext) { if (in_array($simple_html, [self::OSTATUS, self::API, self::ACTIVITYPUB])) { $text = preg_replace_callback("/\[url\](.*?)\[\/url\]/ism", 'self::convertUrlForActivityPubCallback', $text); $text = preg_replace_callback("/\[url\=(.*?)\](.*?)\[\/url\]/ism", 'self::convertUrlForActivityPubCallback', $text); } } else { $text = preg_replace("(\[url\](.*?)\[\/url\])ism", " $1 ", $text); $text = preg_replace_callback("&\[url=([^\[\]]*)\]\[img\](.*)\[\/img\]\[\/url\]&Usi", 'self::removePictureLinksCallback', $text); } // Bookmarks in red - will be converted to bookmarks in friendica $text = preg_replace("/#\^\[url\](.*?)\[\/url\]/ism", '[bookmark=$1]$1[/bookmark]', $text); $text = preg_replace("/#\^\[url\=(.*?)\](.*?)\[\/url\]/ism", '[bookmark=$1]$2[/bookmark]', $text); $text = preg_replace("/#\[url\=.*?\]\^\[\/url\]\[url\=(.*?)\](.*?)\[\/url\]/i", "[bookmark=$1]$2[/bookmark]", $text); if (in_array($simple_html, [self::OSTATUS, self::TWITTER])) { $text = preg_replace_callback("/([^#@!])\[url\=([^\]]*)\](.*?)\[\/url\]/ism", "self::expandLinksCallback", $text); //$text = preg_replace("/[^#@!]\[url\=([^\]]*)\](.*?)\[\/url\]/ism", ' $2 [url]$1[/url]', $text); $text = preg_replace("/\[bookmark\=([^\]]*)\](.*?)\[\/bookmark\]/ism", ' $2 [url]$1[/url]', $text); } // Perform URL Search if ($try_oembed) { $text = preg_replace_callback("/\[bookmark\=([^\]]*)\](.*?)\[\/bookmark\]/ism", $try_oembed_callback, $text); } $text = preg_replace("/\[bookmark\=([^\]]*)\](.*?)\[\/bookmark\]/ism", '[url=$1]$2[/url]', $text); // Handle Diaspora posts $text = preg_replace_callback( "&\[url=/?posts/([^\[\]]*)\](.*)\[\/url\]&Usi", function ($match) { return "[url=" . DI::baseUrl() . "/display/" . $match[1] . "]" . $match[2] . "[/url]"; }, $text ); $text = preg_replace_callback( "&\[url=/people\?q\=(.*)\](.*)\[\/url\]&Usi", function ($match) { return "[url=" . DI::baseUrl() . "/search?search=%40" . $match[1] . "]" . $match[2] . "[/url]"; }, $text ); // Server independent link to posts and comments // See issue: https://github.com/diaspora/diaspora_federation/issues/75 $expression = "=diaspora://.*?/post/([0-9A-Za-z\-_@.:]{15,254}[0-9A-Za-z])=ism"; $text = preg_replace($expression, DI::baseUrl()."/display/$1", $text); /* Tag conversion * Supports: * - #[url=][/url] * - [url=]#[/url] */ self::performWithEscapedTags($text, ['url', 'share'], function ($text) use ($simple_html) { $text = preg_replace_callback("/(?:#\[url\=[^\[\]]*\]|\[url\=[^\[\]]*\]#)(.*?)\[\/url\]/ism", function($matches) use ($simple_html) { if ($simple_html == self::ACTIVITYPUB) { return '#' . XML::escape($matches[1]) . ''; } else { return '#'; } }, $text); return $text; }); // We need no target="_blank" rel="noopener noreferrer" for local links // convert links start with DI::baseUrl() as local link without the target="_blank" rel="noopener noreferrer" attribute $escapedBaseUrl = preg_quote(DI::baseUrl(), '/'); $text = preg_replace("/\[url\](".$escapedBaseUrl.".*?)\[\/url\]/ism", '$1', $text); $text = preg_replace("/\[url\=(".$escapedBaseUrl.".*?)\](.*?)\[\/url\]/ism", '$2', $text); $text = preg_replace("/\[url\](.*?)\[\/url\]/ism", '$1', $text); $text = preg_replace("/\[url\=(.*?)\](.*?)\[\/url\]/ism", '$2', $text); // Red compatibility, though the link can't be authenticated on Friendica $text = preg_replace("/\[zrl\=(.*?)\](.*?)\[\/zrl\]/ism", '$2', $text); // we may need to restrict this further if it picks up too many strays // link acct:user@host to a webfinger profile redirector $text = preg_replace('/acct:([^@]+)@((?!\-)(?:[a-zA-Z\d\-]{0,62}[a-zA-Z\d]\.){1,126}(?!\d+)[a-zA-Z\d]{1,63})/', 'acct:$1@$2', $text); // Perform MAIL Search $text = preg_replace("/\[mail\](.*?)\[\/mail\]/", '$1', $text); $text = preg_replace("/\[mail\=(.*?)\](.*?)\[\/mail\]/", '$2', $text); /// @todo What is the meaning of these lines? $text = preg_replace('/\[\&\;([#a-z0-9]+)\;\]/', '&$1;', $text); $text = preg_replace('/\&\#039\;/', '\'', $text); // Currently deactivated, it made problems with " inside of alt texts. //$text = preg_replace('/\"\;/', '"', $text); // fix any escaped ampersands that may have been converted into links $text = preg_replace('/\<([^>]*?)(src|href)=(.*?)\&\;(.*?)\>/ism', '<$1$2=$3&$4>', $text); // sanitizes src attributes (http and redir URLs for displaying in a web page, cid used for inline images in emails) $allowed_src_protocols = ['//', 'http://', 'https://', 'redir/', 'cid:']; array_walk($allowed_src_protocols, function(&$value) { $value = preg_quote($value, '#');}); $text = preg_replace('#<([^>]*?)(src)="(?!' . implode('|', $allowed_src_protocols) . ')(.*?)"(.*?)>#ism', '<$1$2=""$4 data-original-src="$3" class="invalid-src" title="' . DI::l10n()->t('Invalid source protocol') . '">', $text); // sanitize href attributes (only allowlisted protocols URLs) // default value for backward compatibility $allowed_link_protocols = DI::config()->get('system', 'allowed_link_protocols', []); // Always allowed protocol even if config isn't set or not including it $allowed_link_protocols[] = '//'; $allowed_link_protocols[] = 'http://'; $allowed_link_protocols[] = 'https://'; $allowed_link_protocols[] = 'redir/'; array_walk($allowed_link_protocols, function(&$value) { $value = preg_quote($value, '#');}); $regex = '#<([^>]*?)(href)="(?!' . implode('|', $allowed_link_protocols) . ')(.*?)"(.*?)>#ism'; $text = preg_replace($regex, '<$1$2="javascript:void(0)"$4 data-original-href="$3" class="invalid-href" title="' . DI::l10n()->t('Invalid link protocol') . '">', $text); // Shared content $text = self::convertShare( $text, function (array $attributes, array $author_contact, $content, $is_quote_share) use ($simple_html) { return self::convertShareCallback($attributes, $author_contact, $content, $is_quote_share, $simple_html); }, $uriid ); $text = self::interpolateSavedImagesIntoItemBody($uriid, $text, $saved_image); return $text; }); // Escaped noparse, nobb, pre // Remove escaping tags and replace new lines that remain $text = preg_replace_callback('/\[(noparse|nobb)](.*?)\[\/\1]/ism', function ($match) { return str_replace("\n", "
    ", $match[2]); }, $text); // Additionally, [pre] tags preserve spaces $text = preg_replace_callback("/\[pre\](.*?)\[\/pre\]/ism", function ($match) { return str_replace([' ', "\n"], [' ', "
    "], htmlentities($match[1], ENT_NOQUOTES,'UTF-8')); }, $text); return $text; }); // Escaped code $text = preg_replace_callback("#\[code(?:=([^\]]*))?\](.*?)\[\/code\]#ism", function ($matches) { if (strpos($matches[2], "\n") !== false) { $return = '
    ' . htmlentities(trim($matches[2], "\n\r"), ENT_NOQUOTES, 'UTF-8') . '
    '; } else { $return = '' . htmlentities($matches[2], ENT_NOQUOTES, 'UTF-8') . ''; } return $return; }, $text ); // Default iframe allowed domains/path $allowedIframeDomains = [ DI::baseUrl()->getHostname() . (DI::baseUrl()->getUrlPath() ? '/' . DI::baseUrl()->getUrlPath() : '') . '/oembed/', # The path part has to change with the source in Content\Oembed::iframe 'www.youtube.com/embed/', 'player.vimeo.com/video/', ]; $allowedIframeDomains = array_merge( $allowedIframeDomains, DI::config()->get('system', 'allowed_oembed') ? explode(',', DI::config()->get('system', 'allowed_oembed')) : [] ); $text = HTML::purify($text, $allowedIframeDomains); DI::profiler()->stopRecording(); return trim($text); } /** * Strips the "abstract" tag from the provided text * * @param string $text The text with BBCode * @return string The same text - but without "abstract" element */ public static function stripAbstract(string $text): string { DI::profiler()->startRecording('rendering'); $text = BBCode::performWithEscapedTags($text, ['code', 'noparse', 'nobb', 'pre'], function ($text) { $text = preg_replace("/[\s|\n]*\[abstract\].*?\[\/abstract\][\s|\n]*/ism", ' ', $text); $text = preg_replace("/[\s|\n]*\[abstract=.*?\].*?\[\/abstract][\s|\n]*/ism", ' ', $text); return $text; }); DI::profiler()->stopRecording(); return $text; } /** * Returns the value of the "abstract" element * * @param string $text The text that maybe contains the element * @param string $addon The addon for which the abstract is meant for * @return string The abstract */ public static function getAbstract(string $text, string $addon = ''): string { DI::profiler()->startRecording('rendering'); $addon = strtolower($addon); $abstract = BBCode::performWithEscapedTags($text, ['code', 'noparse', 'nobb', 'pre'], function ($text) use ($addon) { if ($addon && preg_match('#\[abstract=' . preg_quote($addon, '#') . '](.*?)\[/abstract]#ism', $text, $matches)) { return $matches[1]; } if (preg_match("#\[abstract](.*?)\[/abstract]#ism", $text, $matches)) { return $matches[1]; } return ''; }); DI::profiler()->stopRecording(); return $abstract; } /** * Callback function to replace a Friendica style mention in a mention for Diaspora * * @param array $match Matching values for the callback * [1] = Mention type (! or @) * [2] = Name * [3] = Address * @return string Replaced mention * @throws \Friendica\Network\HTTPException\InternalServerErrorException * @throws \ImagickException */ private static function bbCodeMention2DiasporaCallback(array $match): string { $contact = Contact::getByURL($match[3], false, ['addr']); if (empty($contact['addr'])) { return $match[0]; } $mention = $match[1] . '{' . $match[2] . '; ' . $contact['addr'] . '}'; return $mention; } /** * Converts a BBCode text into Markdown * * This function converts a BBCode item body to be sent to Markdown-enabled * systems like Diaspora and Libertree * * @param string $text * @param bool $for_diaspora Diaspora requires more changes than Libertree * @return string * @throws \Friendica\Network\HTTPException\InternalServerErrorException */ public static function toMarkdown(string $text, bool $for_diaspora = true): string { DI::profiler()->startRecording('rendering'); $original_text = $text; // Since Diaspora is creating a summary for links, this function removes them before posting if ($for_diaspora) { $text = self::removeShareInformation($text); } /** * Transform #tags, strip off the [url] and replace spaces with underscore */ $url_search_string = "^\[\]"; $text = preg_replace_callback("/#\[url\=([$url_search_string]*)\](.*?)\[\/url\]/i", function ($matches) { return '#' . str_replace(' ', '_', $matches[2]); }, $text ); // Converting images with size parameters to simple images. Markdown doesn't know it. $text = preg_replace("/\[img\=([0-9]*)x([0-9]*)\](.*?)\[\/img\]/ism", '[img]$3[/img]', $text); // Convert it to HTML - don't try oembed if ($for_diaspora) { $text = self::convert($text, false, self::DIASPORA); // Add all tags that maybe were removed if (preg_match_all("/#\[url\=([$url_search_string]*)\](.*?)\[\/url\]/ism", $original_text, $tags)) { $tagline = ''; foreach ($tags[2] as $tag) { $tag = html_entity_decode($tag, ENT_QUOTES, 'UTF-8'); if (!strpos(html_entity_decode($text, ENT_QUOTES, 'UTF-8'), '#' . $tag)) { $tagline .= '#' . $tag . ' '; } } $text = $text . ' ' . $tagline; } } else { $text = self::convert($text, false, self::CONNECTORS); } // If a link is followed by a quote then there should be a newline before it // Maybe we should make this newline at every time before a quote. $text = str_replace(['
    '], ['
    '], $text); // Now convert HTML to Markdown $text = HTML::toMarkdown($text); // Libertree has a problem with escaped hashtags. $text = str_replace(['\#'], ['#'], $text); // Remove any leading or trailing whitespace, as this will mess up // the Diaspora signature verification and cause the item to disappear $text = trim($text); if ($for_diaspora) { $url_search_string = "^\[\]"; $text = preg_replace_callback( "/([@!])\[(.*?)\]\(([$url_search_string]*?)\)/ism", ['self', 'bbCodeMention2DiasporaCallback'], $text ); } Hook::callAll('bb2diaspora', $text); DI::profiler()->stopRecording(); return $text; } /** * Pull out all #hashtags and @person tags from $string. * * We also get @person@domain.com - which would make * the regex quite complicated as tags can also * end a sentence. So we'll run through our results * and strip the period from any tags which end with one. * Returns array of tags found, or empty array. * * @param string $string Post content * @return array List of tag and person names */ public static function getTags(string $string): array { DI::profiler()->startRecording('rendering'); $ret = []; self::performWithEscapedTags($string, ['noparse', 'pre', 'code', 'img'], function ($string) use (&$ret) { // Convert hashtag links to hashtags $string = preg_replace('/#\[url\=([^\[\]]*)\](.*?)\[\/url\]/ism', '#$2 ', $string); // Force line feeds at bbtags $string = str_replace(['[', ']'], ["\n[", "]\n"], $string); // ignore anything in a bbtag $string = preg_replace('/\[(.*?)\]/sm', '', $string); // Match full names against @tags including the space between first and last // We will look these up afterward to see if they are full names or not recognisable. if (preg_match_all('/(@[^ \x0D\x0A,:?]+ [^ \x0D\x0A@,:?]+)([ \x0D\x0A@,:?]|$)/', $string, $matches)) { foreach ($matches[1] as $match) { if (strstr($match, ']')) { // we might be inside a bbcode color tag - leave it alone continue; } if (substr($match, -1, 1) === '.') { $ret[] = substr($match, 0, -1); } else { $ret[] = $match; } } } // Otherwise pull out single word tags. These can be @nickname, @first_last // and #hash tags. if (preg_match_all('/([!#@][^\^ \x0D\x0A,;:?\']*[^\^ \x0D\x0A,;:?!\'.])/', $string, $matches)) { foreach ($matches[1] as $match) { if (strstr($match, ']')) { // we might be inside a bbcode color tag - leave it alone continue; } // try not to catch url fragments if (strpos($string, $match) && preg_match('/[a-zA-z0-9\/]/', substr($string, strpos($string, $match) - 1, 1))) { continue; } $ret[] = $match; } } }); DI::profiler()->stopRecording(); return array_unique($ret); } /** * Expand tags to URLs, checks the tag is at the start of a line or preceded by a non-word character * * @param string $body HTML/BBCode * @return string body with expanded tags */ public static function expandTags(string $body): string { return preg_replace_callback("/(?<=\W|^)([!#@])([^\^ \x0D\x0A,;:?'\"]*[^\^ \x0D\x0A,;:?!'\".])/", function (array $match) { switch ($match[1]) { case '!': case '@': $contact = Contact::getByURL($match[2]); if (!empty($contact)) { return $match[1] . '[url=' . $contact['url'] . ']' . $contact['name'] . '[/url]'; } else { return $match[1] . $match[2]; } break; case '#': default: return $match[1] . '[url=' . DI::baseUrl() . '/search?tag=' . $match[2] . ']' . $match[2] . '[/url]'; } }, $body); } /** * Perform a custom function on a text after having escaped blocks enclosed in the provided tag list. * * @param string $text HTML/BBCode * @param array $tagList A list of tag names, e.g ['noparse', 'nobb', 'pre'] * @param callable $callback * @return string * @see Strings::performWithEscapedBlocks */ public static function performWithEscapedTags(string $text, array $tagList, callable $callback): string { $tagList = array_map('preg_quote', $tagList); return Strings::performWithEscapedBlocks($text, '#\[(?:' . implode('|', $tagList) . ').*?\[/(?:' . implode('|', $tagList) . ')]#ism', $callback); } /** * Replaces mentions in the provided message body in BBCode links for the provided user and network if any * * @param string $body HTML/BBCode * @param int $profile_uid Profile user id * @param string $network Network name * @return string HTML/BBCode with inserted images * @throws \Friendica\Network\HTTPException\InternalServerErrorException * @throws \ImagickException */ public static function setMentions(string $body, $profile_uid = 0, $network = '') { DI::profiler()->startRecording('rendering'); $body = self::performWithEscapedTags($body, ['noparse', 'pre', 'code', 'img'], function ($body) use ($profile_uid, $network) { $tags = self::getTags($body); $tagged = []; foreach ($tags as $tag) { $tag_type = substr($tag, 0, 1); if ($tag_type == Tag::TAG_CHARACTER[Tag::HASHTAG]) { continue; } /* * If we already tagged 'Robert Johnson', don't try and tag 'Robert'. * Robert Johnson should be first in the $tags array */ foreach ($tagged as $nextTag) { if (stristr($nextTag, $tag . ' ')) { continue 2; } } if (($success = Item::replaceTag($body, $profile_uid, $tag, $network)) && $success['replaced']) { $tagged[] = $tag; } } return $body; }); DI::profiler()->stopRecording(); return $body; } /** * @param string $author Author display name * @param string $profile Author profile URL * @param string $avatar Author profile picture URL * @param string $link Post source URL * @param string $posted Post created date * @param string|null $guid Post guid (if any) * @param string|null $uri Post uri (if any) * @return string * @TODO Rewrite to handle over whole record array */ public static function getShareOpeningTag(string $author, string $profile, string $avatar, string $link, string $posted, string $guid = null, string $uri = null): string { DI::profiler()->startRecording('rendering'); $header = "[share author='" . str_replace(["'", "[", "]"], ["'", "[", "]"], $author) . "' profile='" . str_replace(["'", "[", "]"], ["'", "[", "]"], $profile) . "' avatar='" . str_replace(["'", "[", "]"], ["'", "[", "]"], $avatar) . "' link='" . str_replace(["'", "[", "]"], ["'", "[", "]"], $link) . "' posted='" . str_replace(["'", "[", "]"], ["'", "[", "]"], $posted); if ($guid) { $header .= "' guid='" . str_replace(["'", "[", "]"], ["'", "[", "]"], $guid); } if ($uri) { $header .= "' message_id='" . str_replace(["'", "[", "]"], ["'", "[", "]"], $uri); } $header .= "']"; DI::profiler()->stopRecording(); return $header; } /** * Returns the BBCode relevant to embed the provided URL in a post body. * For media type, it will return [img], [video] and [audio] tags. * For regular web pages, it will either output a [bookmark] tag if title and description were provided, * an [attachment] tag or a simple [url] tag depending on $tryAttachment. * * @param string $url * @param bool $tryAttachment * @param string|null $title * @param string|null $description * @param string|null $tags * @return string * @throws \Friendica\Network\HTTPException\InternalServerErrorException * @see ParseUrl::getSiteinfoCached */ public static function embedURL(string $url, bool $tryAttachment = true, string $title = null, string $description = null, string $tags = null): string { DI::profiler()->startRecording('rendering'); DI::logger()->info($url); // If there is already some content information submitted we don't // need to parse the url for content. if (!empty($title) && !empty($description)) { $title = str_replace(["\r", "\n"], ['', ''], $title); $description = '[quote]' . trim($description) . '[/quote]' . "\n"; $str_tags = ''; if (!empty($tags)) { $arr_tags = ParseUrl::convertTagsToArray($tags); if (count($arr_tags)) { $str_tags = "\n" . implode(' ', $arr_tags) . "\n"; } } $result = sprintf('[bookmark=%s]%s[/bookmark]%s', $url, ($title) ? $title : $url, $description) . $str_tags; DI::logger()->info('(unparsed): returns: ' . $result); DI::profiler()->stopRecording(); return $result; } $siteinfo = ParseUrl::getSiteinfoCached($url); if (in_array($siteinfo['type'], ['image', 'video', 'audio'])) { switch ($siteinfo['type']) { case 'video': $bbcode = "\n" . '[video]' . $url . '[/video]' . "\n"; break; case 'audio': $bbcode = "\n" . '[audio]' . $url . '[/audio]' . "\n"; break; default: $bbcode = "\n" . '[img]' . $url . '[/img]' . "\n"; break; } DI::profiler()->stopRecording(); return $bbcode; } unset($siteinfo['keywords']); // Bypass attachment if parse url for a comment if (!$tryAttachment) { DI::profiler()->stopRecording(); return "\n" . '[url=' . $url . ']' . $siteinfo['title'] . '[/url]'; } // Format it as BBCode attachment $bbcode = "\n" . PageInfo::getFooterFromData($siteinfo); DI::profiler()->stopRecording(); return $bbcode; } }