friendica/include/bbcode.php

<?php
/**
 * @file include/bbcode.php
 */
use Friendica\App;
use Friendica\Content\Smilies;
use Friendica\Content\OEmbed;
use Friendica\Content\Text\Plaintext;
use Friendica\Core\Addon;
use Friendica\Core\Cache;
use Friendica\Core\L10n;
use Friendica\Core\System;
use Friendica\Core\Config;
use Friendica\Model\Contact;
use Friendica\Util\Map;

require_once 'include/event.php';
require_once 'mod/proxy.php';

function bb_PictureCacheExt($matches) {
	if (strpos($matches[3], "data:image/") === 0) {
		return $matches[0];
	}

	$matches[3] = proxy_url($matches[3]);
	return "[img=" . $matches[1] . "x" . $matches[2] . "]" . $matches[3] . "[/img]";
}

function bb_PictureCache($matches) {
	if (strpos($matches[1], "data:image/") === 0) {
		return $matches[0];
	}

	$matches[1] = proxy_url($matches[1]);
	return "[img]" . $matches[1] . "[/img]";
}

function bb_map_coords($match) {
	// the extra space in the following line is intentional
	return str_replace($match[0], '<div class="map"  >' . Map::byCoordinates(str_replace('/', ' ', $match[1])) . '</div>', $match[0]);
}
function bb_map_location($match) {
	// the extra space in the following line is intentional
	return str_replace($match[0], '<div class="map"  >' . Map::byLocation($match[1]) . '</div>', $match[0]);
}

/**
 * Processes [attachment] tags
 *
 * Note: Can produce a [bookmark] tag in the returned string
 *
 * @brief Processes [attachment] tags
 * @param string $return
 * @param bool|int $simplehtml
 * @param bool $tryoembed
 * @return string
 */
function bb_attachment($return, $simplehtml = false, $tryoembed = true)
{
	$data = Plaintext::getAttachmentData($return);
	if (!$data) {
		return $return;
	}

	if (isset($data["title"])) {
		$data["title"] = strip_tags($data["title"]);
		$data["title"] = str_replace(["http://", "https://"], "", $data["title"]);
	}

	if (((strpos($data["text"], "[img=") !== false) || (strpos($data["text"], "[img]") !== false) || Config::get('system', 'always_show_preview')) && ($data["image"] != "")) {
		$data["preview"] = $data["image"];
		$data["image"] = "";
	}

	$return = '';
	if ($simplehtml == 7) {
		$return = style_url_for_mastodon($data["url"]);
	} elseif (($simplehtml != 4) && ($simplehtml != 0)) {
		$return = sprintf('<a href="%s" target="_blank">%s</a><br>', $data["url"], $data["title"]);
	} else {
		try {
			if ($tryoembed && OEmbed::isAllowedURL($data['url'])) {
				$return = OEmbed::getHTML($data['url'], $data['title']);
			} else {
				throw new Exception('OEmbed is disabled for this attachment.');
			}
		} catch (Exception $e) {
			if ($simplehtml != 4) {
				$return = sprintf('<div class="type-%s">', $data["type"]);
			}

			if ($data["image"] != "") {
				$return .= sprintf('<a href="%s" target="_blank"><img src="%s" alt="" title="%s" class="attachment-image" /></a><br />', $data["url"], proxy_url($data["image"]), $data["title"]);
			} elseif ($data["preview"] != "") {
				$return .= sprintf('<a href="%s" target="_blank"><img src="%s" alt="" title="%s" class="attachment-preview" /></a><br />', $data["url"], proxy_url($data["preview"]), $data["title"]);
			}

			if (($data["type"] == "photo") && ($data["url"] != "") && ($data["image"] != "")) {
				$return .= sprintf('<a href="%s" target="_blank"><img src="%s" alt="" title="%s" class="attachment-image" /></a>', $data["url"], proxy_url($data["image"]), $data["title"]);
			} else {
				$return .= sprintf('<h4><a href="%s">%s</a></h4>', $data['url'], $data['title']);
			}

			if ($data["description"] != "" && $data["description"] != $data["title"]) {
				$return .= sprintf('<blockquote>%s</blockquote>', trim(bbcode($data["description"])));
			}

			if ($data["type"] == "link") {
				$return .= sprintf('<sup><a href="%s">%s</a></sup>', $data['url'], parse_url($data['url'], PHP_URL_HOST));
			}

			if ($simplehtml != 4) {
				$return .= '</div>';
			}
		}
	}

	return trim($data["text"] . ' ' . $return . ' ' . $data["after"]);
}

function bb_remove_share_information($Text, $plaintext = false, $nolink = false) {

	$data = Plaintext::getAttachmentData($Text);

	if (!$data) {
		return $Text;
	} elseif ($nolink) {
		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 (($data["text"] == "") && ($data["title"] != "") && ($data["url"] == "")) {
		return $data["title"] . $data["after"];
	}

	// If the link already is included in the post, don't add it again
	if (($data["url"] != "") && strpos($data["text"], $data["url"])) {
		return $data["text"] . $data["after"];
	}

	$text = $data["text"];

	if (($data["url"] != "") && ($data["title"] != "")) {
		$text .= "\n[url=" . $data["url"] . "]" . $data["title"] . "[/url]";
	} elseif (($data["url"] != "")) {
		$text .= "\n" . $data["url"];
	}

	return $text . "\n" . $data["after"];
}

function bb_cleanstyle($st) {
	return "<span style=\"" . cleancss($st[1]) . ";\">" . $st[2] . "</span>";
}

function bb_cleanclass($st) {
	return "<span class=\"" . cleancss($st[1]) . "\">" . $st[2] . "</span>";
}

function cleancss($input) {

	$cleaned = "";

	$input = strtolower($input);

	for ($i = 0; $i < strlen($input); $i++) {
		$char = substr($input, $i, 1);

		if (($char >= "a") && ($char <= "z")) {
			$cleaned .= $char;
		}

		if (!(strpos(" #;:0123456789-_.%", $char) === false)) {
			$cleaned .= $char;
		}
	}

	return $cleaned;
}

/**
 * @brief Converts [url] BBCodes in a format that looks fine on Mastodon. (callback function)
 * @param array $match Array with the matching values
 * @return string reformatted link including HTML codes
 */
function bb_style_url($match) {
        $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 style_url_for_mastodon($url);
}

/**
 * @brief Converts [url] BBCodes in a format that looks fine on Mastodon and GNU Social.
 * @param string $url URL that is about to be reformatted
 * @return string reformatted link including HTML codes
 */
function style_url_for_mastodon($url) {
        $styled_url = $url;

        $parts = parse_url($url);
        $scheme = $parts['scheme'].'://';
        $styled_url = str_replace($scheme, '', $styled_url);

        $html = '<a href="%s" class="attachment" rel="nofollow noopener" target="_blank">'.
                 '<span class="invisible">%s</span>';

        if (strlen($styled_url) > 30) {
                $html .= '<span class="ellipsis">%s</span>'.
                        '<span class="invisible">%s</span></a>';

                $ellipsis = substr($styled_url, 0, 30);
                $rest = substr($styled_url, 30);
                return sprintf($html, $url, $scheme, $ellipsis, $rest);
        } else {
                $html .= '%s</a>';
                return sprintf($html, $url, $scheme, $styled_url);
        }
}

function stripcode_br_cb($s) {
	return '[code]' . str_replace('<br />', '', $s[1]) . '[/code]';
}

/*
 * [noparse][i]italic[/i][/noparse] turns into
 * [noparse][ i ]italic[ /i ][/noparse],
 * to hide them from parser.
 */
function bb_spacefy($st) {
	$whole_match = $st[0];
	$captured = $st[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]
 */
function bb_unspacefy_and_trim($st) {
	$captured = $st[1];
	$unspacefied = preg_replace("/\[ (.*?)\ ]/", "[$1]", $captured);
	return $unspacefied;
}

function bb_find_open_close($s, $open, $close, $occurence = 1) {
	if ($occurence < 1) {
		$occurence = 1;
	}

	$start_pos = -1;
	for ($i = 1; $i <= $occurence; $i++) {
		if ($start_pos !== false) {
			$start_pos = strpos($s, $open, $start_pos + 1);
		}
	}

	if ($start_pos === false) {
		return false;
	}

	$end_pos = strpos($s, $close, $start_pos);

	if ($end_pos === false) {
		return false;
	}

	$res = [ 'start' => $start_pos, 'end' => $end_pos ];

	return $res;
}

function get_bb_tag_pos($s, $name, $occurence = 1) {
	if ($occurence < 1) {
		$occurence = 1;
	}

	$start_open = -1;
	for ($i = 1; $i <= $occurence; $i++) {
		if ($start_open !== false) {
			$start_open = strpos($s, '[' . $name, $start_open + 1); // allow [name= type tags
		}
	}

	if ($start_open === false) {
		return false;
	}

	$start_equal = strpos($s, '=', $start_open);
	$start_close = strpos($s, ']', $start_open);

	if ($start_close === false) {
		return false;
	}

	$start_close++;

	$end_open = strpos($s, '[/' . $name . ']', $start_close);

	if ($end_open === false) {
		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;
	}

	return $res;
}

function bb_tag_preg_replace($pattern, $replace, $name, $s) {

	$string = $s;

	$occurence = 1;
	$pos = get_bb_tag_pos($string, $name, $occurence);
	while ($pos !== false && $occurence < 1000) {
		$start = substr($string, 0, $pos['start']['open']);
		$subject = substr($string, $pos['start']['open'], $pos['end']['close'] - $pos['start']['open']);
		$end = substr($string, $pos['end']['close']);
		if ($end === false) {
			$end = '';
		}

		$subject = preg_replace($pattern, $replace, $subject);
		$string = $start . $subject . $end;

		$occurence++;
		$pos = get_bb_tag_pos($string, $name, $occurence);
	}

	return $string;
}

function bb_extract_images($body) {

	$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];
}

function bb_replace_images($body, $images) {

	$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' . $cnt . '#$]', '<img src="' . proxy_url($image) .'" alt="' . L10n::t('Image/photo') . '" />', $newbody);
		$cnt++;
	}

	return $newbody;
}

/**
 * Processes [share] tags
 *
 * Note: Can produce a [bookmark] tag in the output
 *
 * @brief Processes [share] tags
 * @param array    $share      preg_match_callback result array
 * @param bool|int $simplehtml
 * @return string
 */
function bb_ShareAttributes($share, $simplehtml)
{
	$attributes = $share[2];

	$author = "";
	preg_match("/author='(.*?)'/ism", $attributes, $matches);
	if (x($matches, 1)) {
		$author = html_entity_decode($matches[1], ENT_QUOTES, 'UTF-8');
	}

	preg_match('/author="(.*?)"/ism', $attributes, $matches);
	if (x($matches, 1)) {
		$author = $matches[1];
	}

	$profile = "";
	preg_match("/profile='(.*?)'/ism", $attributes, $matches);
	if (x($matches, 1)) {
		$profile = $matches[1];
	}

	preg_match('/profile="(.*?)"/ism', $attributes, $matches);
	if (x($matches, 1)) {
		$profile = $matches[1];
	}

	$avatar = "";
	preg_match("/avatar='(.*?)'/ism", $attributes, $matches);
	if (x($matches, 1)) {
		$avatar = $matches[1];
	}

	preg_match('/avatar="(.*?)"/ism', $attributes, $matches);
	if (x($matches, 1)) {
		$avatar = $matches[1];
	}

	$link = "";
	preg_match("/link='(.*?)'/ism", $attributes, $matches);
	if (x($matches, 1)) {
		$link = $matches[1];
	}

	preg_match('/link="(.*?)"/ism', $attributes, $matches);
	if (x($matches, 1)) {
		$link = $matches[1];
	}

	$posted = "";

	preg_match("/posted='(.*?)'/ism", $attributes, $matches);
	if (x($matches, 1)) {
		$posted = $matches[1];
	}

	preg_match('/posted="(.*?)"/ism', $attributes, $matches);
	if (x($matches, 1)) {
		$posted = $matches[1];
	}

	// We only call this so that a previously unknown contact can be added.
	// This is important for the function "get_contact_details_by_url".
	// This function then can fetch an entry from the contact table.
	Contact::getIdForURL($profile, 0);

	$data = Contact::getDetailsByURL($profile);

	if (x($data, "name") && x($data, "addr")) {
		$userid_compact = $data["name"] . " (" . $data["addr"] . ")";
	} else {
		$userid_compact = GetProfileUsername($profile, $author, true);
	}

	if (x($data, "addr")) {
		$userid = $data["addr"];
	} else {
		$userid = GetProfileUsername($profile, $author, false);
	}

	if (x($data, "name")) {
		$author = $data["name"];
	}

	if (x($data, "micro")) {
		$avatar = $data["micro"];
	}

	$preshare = trim($share[1]);
	if ($preshare != "") {
		$preshare .= "<br />";
	}

	switch ($simplehtml) {
		case 1:
			$text = $preshare . html_entity_decode("&#x2672; ", ENT_QUOTES, 'UTF-8') . ' <a href="' . $profile . '">' . $userid . "</a>: <br />»" . $share[3] . "«";
			break;
		case 2:
			$text = $preshare . html_entity_decode("&#x2672; ", ENT_QUOTES, 'UTF-8') . ' ' . $userid_compact . ": <br />" . $share[3];
			break;
		case 3: // Diaspora
			$headline .= '<b>' . html_entity_decode("&#x2672; ", ENT_QUOTES, 'UTF-8') . $userid . ':</b><br />';

			$text = trim($share[1]);

			if ($text != "") {
				$text .= "<hr />";
			}

			if (stripos(normalise_link($link), 'http://twitter.com/') === 0) {
				$text .= $headline . '<blockquote>' . trim($share[3]) . "</blockquote><br />";

				if ($link != "") {
					$text .= '<br /><a href="' . $link . '">[l]</a>';
				}
			} else {
				$text .= '<br /><a href="' . $link . '">' . $link . '</a>';
			}

			break;
		case 4:
			$headline .= '<br /><b>' . html_entity_decode("&#x2672; ", ENT_QUOTES, 'UTF-8');
			$headline .= L10n::t('<a href="%1$s" target="_blank">%2$s</a> %3$s', $link, $userid, $posted);
			$headline .= ":</b><br />";

			$text = trim($share[1]);

			if ($text != "") {
				$text .= "<hr />";
			}

			$text .= $headline . '<blockquote class="shared_content">' . trim($share[3]) . "</blockquote><br />";

			break;
		case 5:
			$text = $preshare . html_entity_decode("&#x2672; ", ENT_QUOTES, 'UTF-8') . ' ' . $userid_compact . ": <br />" . $share[3];
			break;
		case 6: // app.net
			$text = $preshare . "&gt;&gt; @" . $userid_compact . ": <br />" . $share[3];
			break;
		case 7: // statusnet/GNU Social
			$text = $preshare . html_entity_decode("&#x2672; ", ENT_QUOTES, 'UTF-8') . " @" . $userid_compact . ": " . $share[3];
			break;
		case 8: // twitter
			$text = $preshare . "RT @" . $userid_compact . ": " . $share[3];
			break;
		case 9: // Google+/Facebook
			$text = $preshare . html_entity_decode("&#x2672; ", ENT_QUOTES, 'UTF-8') . ' ' . $userid_compact . ": <br />" . $share[3];

			if ($link != "") {
				$text .= "<br /><br />" . $link;
			}
			break;
		default:
			// Transforms quoted tweets in rich attachments to avoid nested tweets
			if (stripos(normalise_link($link), 'http://twitter.com/') === 0 && OEmbed::isAllowedURL($link)) {
				try {
					$oembed = OEmbed::getHTML($link, $preshare);
				} catch (Exception $e) {
					$oembed = sprintf('[bookmark=%s]%s[/bookmark]', $link, $preshare);
				}

				$text = $preshare . $oembed;
			} else {
				$text = trim($share[1]) . "\n";

				$avatar = proxy_url($avatar, false, PROXY_SIZE_THUMB);

				$tpl = get_markup_template('shared_content.tpl');
				$text .= replace_macros($tpl, [
					'$profile' => $profile,
					'$avatar' => $avatar,
					'$author' => $author,
					'$link' => $link,
					'$posted' => $posted,
					'$content' => trim($share[3])
				]);
			}
			break;
	}

	return $text;
}

function GetProfileUsername($profile, $username, $compact = false, $getnetwork = false) {

	$twitter = preg_replace("=https?://twitter.com/(.*)=ism", "$1@twitter.com", $profile);
	if ($twitter != $profile) {
		if ($getnetwork) {
			return NETWORK_TWITTER;
		} elseif ($compact) {
			return $twitter;
		} else {
			return ($username . " (" . $twitter . ")");
		}
	}

	$appnet = preg_replace("=https?://alpha.app.net/(.*)=ism", "$1@alpha.app.net", $profile);
	if ($appnet != $profile) {
		if ($getnetwork) {
			return NETWORK_APPNET;
		} elseif ($compact) {
			return $appnet;
		} else {
			return ($username . " (" . $appnet . ")");
		}
	}

	$gplus = preg_replace("=https?://plus.google.com/(.*)=ism", "$1@plus.google.com", $profile);
	if ($gplus != $profile) {
		if ($getnetwork) {
			return NETWORK_GPLUS;
		} elseif ($compact) {
			return ($gplususername . " (" . $username . ")");
		} else {
			return ($username . " (" . $gplus . ")");
		}
	}

	$friendica = preg_replace("=https?://(.*)/profile/(.*)=ism", "$2@$1", $profile);
	if ($friendica != $profile) {
		if ($getnetwork) {
			return NETWORK_DFRN;
		} elseif ($compact) {
			return $friendica;
		} else {
			return ($username . " (" . $friendica . ")");
		}
	}

	$diaspora = preg_replace("=https?://(.*)/u/(.*)=ism", "$2@$1", $profile);
	if ($diaspora != $profile) {
		if ($getnetwork) {
			return NETWORK_DIASPORA;
		} elseif ($compact) {
			return $diaspora;
		} else {
			return ($username . " (" . $diaspora . ")");
		}
	}

	$red = preg_replace("=https?://(.*)/channel/(.*)=ism", "$2@$1", $profile);
	if ($red != $profile) {
		if ($getnetwork) {
			// red is identified as Diaspora - friendica can't connect directly to it
			return NETWORK_DIASPORA;
		} elseif ($compact) {
			return $red;
		} else {
			return ($username . " (" . $red . ")");
		}
	}

	$StatusnetHost = preg_replace("=https?://(.*)/user/(.*)=ism", "$1", $profile);
	if ($StatusnetHost != $profile) {
		$StatusnetUser = preg_replace("=https?://(.*)/user/(.*)=ism", "$2", $profile);
		if ($StatusnetUser != $profile) {
			/// @TODO Some hosts run on https, not just http and sometimes http is disabled, let's support both here
			$UserData = fetch_url("http://".$StatusnetHost."/api/users/show.json?user_id=".$StatusnetUser);
			$user = json_decode($UserData);
			if ($user) {
				if ($getnetwork) {
					return NETWORK_STATUSNET;
				} elseif ($compact) {
					return ($user->screen_name . "@" . $StatusnetHost);
				} else {
					return ($username . " (" . $user->screen_name . "@" . $StatusnetHost . ")");
				}
			}
		}
	}

	// pumpio (http://host.name/user)
	$rest = preg_replace("=https?://([\.\w]+)/([\.\w]+)(.*)=ism", "$3", $profile);
	if ($rest == "") {
		$pumpio = preg_replace("=https?://([\.\w]+)/([\.\w]+)(.*)=ism", "$2@$1", $profile);
		if ($pumpio != $profile) {
			if ($getnetwork) {
				return NETWORK_PUMPIO;
			} elseif ($compact) {
				return $pumpio;
			} else {
				return ($username . " (" . $pumpio . ")");
			}
		}
	}

	return $username;
}

function bb_DiasporaLinks($match) {
	return "[url=".System::baseUrl()."/display/".$match[1]."]".$match[2]."[/url]";
}

function bb_RemovePictureLinks($match) {
	$text = Cache::get($match[1]);

	if (is_null($text)) {
		$a = get_app();

		$stamp1 = microtime(true);

		$ch = @curl_init($match[1]);
		@curl_setopt($ch, CURLOPT_NOBODY, true);
		@curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
		@curl_setopt($ch, CURLOPT_USERAGENT, $a->get_useragent());
		@curl_exec($ch);
		$curl_info = @curl_getinfo($ch);

		$a->save_timestamp($stamp1, "network");

		if (substr($curl_info["content_type"], 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
			require_once("include/network.php");

			$body = fetch_url($match[1]);

			$doc = new DOMDocument();
			@$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"]."]".$attr["content"]."[/url]";
			}
		}
		Cache::set($match[1],$text);
	}

	return $text;
}

function bb_expand_links($match) {
	if (($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]");
	}
}

function bb_CleanPictureLinksSub($match) {
	$text = Cache::get($match[1]);

	if (is_null($text)) {
		$a = get_app();

		$stamp1 = microtime(true);

		$ch = @curl_init($match[1]);
		@curl_setopt($ch, CURLOPT_NOBODY, true);
		@curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
		@curl_setopt($ch, CURLOPT_USERAGENT, $a->get_useragent());
		@curl_exec($ch);
		$curl_info = @curl_getinfo($ch);

		$a->save_timestamp($stamp1, "network");

		// if its a link to a picture then embed this picture
		if (substr($curl_info["content_type"], 0, 6) == "image/")
			$text = "[img]".$match[1]."[/img]";
		else {
			$text = "[img]".$match[2]."[/img]";

			// if its not a picture then look if its a page that contains a picture link
			require_once("include/network.php");

			$body = fetch_url($match[1]);

			$doc = new DOMDocument();
			@$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")
					$text = "[img]".$attr["content"]."[/img]";
			}
		}
		Cache::set($match[1],$text);
	}

	return $text;
}

function bb_CleanPictureLinks($text) {
	$text = preg_replace_callback("&\[url=([^\[\]]*)\]\[img\](.*)\[\/img\]\[\/url\]&Usi", 'bb_CleanPictureLinksSub', $text);
	return $text;
}

function bb_highlight($match) {
	if (in_array(strtolower($match[1]), ['php', 'css', 'mysql', 'sql', 'abap', 'diff', 'html', 'perl', 'ruby',
		'vbscript', 'avrc', 'dtd', 'java', 'xml', 'cpp', 'python', 'javascript', 'js', 'sh'])) {
		return text_highlight($match[2], strtolower($match[1]));
	}
	return $match[0];
}

/**
 * @brief 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 Facebook, Google+, 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: Used for Appnet
 * - 7: Used for dfrn, OStatus
 * - 8: Used for WP backlink text setting
 *
 * @staticvar array $allowed_src_protocols
 * @param string $Text
 * @param bool $preserve_nl
 * @param bool $tryoembed
 * @param int $simplehtml
 * @param bool $forplaintext
 * @return string
 */
function bbcode($Text, $preserve_nl = false, $tryoembed = true, $simplehtml = false, $forplaintext = false)
{
	$a = get_app();

	/*
	 * 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
	 */
	$tryoembed_callback = function ($match)
	{
		$url = $match[1];
		$title = defaults($match, 2, null);

		try {
			$return = OEmbed::getHTML($url, $title);
		} catch (Exception $ex) {
			$return = $match[0];
		}

		return $return;
	};

	// Hide all [noparse] contained bbtags by spacefying them
	// POSSIBLE BUG --> Will the 'preg' functions crash if there's an embedded image?

	$Text = preg_replace_callback("/\[noparse\](.*?)\[\/noparse\]/ism", 'bb_spacefy', $Text);
	$Text = preg_replace_callback("/\[nobb\](.*?)\[\/nobb\]/ism", 'bb_spacefy', $Text);
	$Text = preg_replace_callback("/\[pre\](.*?)\[\/pre\]/ism", 'bb_spacefy', $Text);

	// Remove the abstract element. It is a non visible element.
	$Text = remove_abstract($Text);

	// Move all spaces out of the tags
	$Text = preg_replace("/\[(\w*)\](\s*)/ism", '$2[$1]', $Text);
	$Text = preg_replace("/(\s*)\[\/(\w*)\]/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.

	$extracted = bb_extract_images($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.

	$ev = bbtoevent($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("<", "&lt;", $Text);
	$Text = str_replace(">", "&gt;", $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);

	$Text = preg_replace("/\n\[code\]/ism", "[code]", $Text);
	$Text = preg_replace("/\[\/code\]\n/ism", "[/code]", $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 (!$tryoembed) {
		$Text = preg_replace("/\[share(.*?)avatar\s?=\s?'.*?'\s?(.*?)\]\s?(.*?)\s?\[\/share\]\s?/ism", "\n[share$1$2]$3[/share]", $Text);
	}

	// Check for [code] text here, before the linefeeds are messed with.
	// The highlighter will unescape and re-escape the content.
	if (strpos($Text, '[code=') !== false) {
		$Text = preg_replace_callback("/\[code=(.*?)\](.*?)\[\/code\]/ism", 'bb_highlight', $Text);
	}
	// Convert new line chars to html <br /> tags

	// nlbr seems to be hopelessly messed up
	//	$Text = nl2br($Text);

	// We'll emulate it.

	$Text = trim($Text);
	$Text = str_replace("\r\n", "\n", $Text);

	// removing multiplicated newlines
	if (Config::get("system", "remove_multiplicated_lines")) {
		$search = ["\n\n\n", "\n ", " \n", "[/quote]\n\n", "\n[/quote]", "[/li]\n", "\n[li]", "\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);
	}

	// Set up the parameters for a URL search string
	$URLSearchString = "^\[\]";
	// Set up the parameters for a MAIL search string
	$MAILSearchString = $URLSearchString;

	// if the HTML is used to generate plain text, then don't do this search, but replace all URL of that kind to text
	if (!$forplaintext) {
		// Autolink feature (thanks to http://code.seebz.net/p/autolink-php/)
		// Currently disabled, since the function is too greedy
		// $autolink_regex = "`([^\]\=\"']|^)(https?\://[^\s<]+[^\s<\.\)])`ism";
		$autolink_regex = "/([^\]\='".'"'."]|^)(https?\:\/\/[a-zA-Z0-9\:\/\-\?\&\;\.\=\_\~\#\%\$\!\+\,]+)/ism";
		$Text = preg_replace($autolink_regex, '$1[url]$2[/url]', $Text);
		if ($simplehtml == 7) {
			$Text = preg_replace_callback("/\[url\]([$URLSearchString]*)\[\/url\]/ism", 'bb_style_url', $Text);
			$Text = preg_replace_callback("/\[url\=([$URLSearchString]*)\]([$URLSearchString]*)\[\/url\]/ism", 'bb_style_url', $Text);
		}
	} else {
		$Text = preg_replace("(\[url\]([$URLSearchString]*)\[\/url\])ism", " $1 ", $Text);
		$Text = preg_replace_callback("&\[url=([^\[\]]*)\]\[img\](.*)\[\/img\]\[\/url\]&Usi", 'bb_RemovePictureLinks', $Text);
	}


	// Handle attached links or videos
	$Text = bb_attachment($Text, $simplehtml, $tryoembed);

	$Text = str_replace(["\r","\n"], ['<br />', '<br />'], $Text);

	if ($preserve_nl) {
		$Text = str_replace(["\n", "\r"], ['', ''], $Text);
	}

	// Remove all hashtag addresses
	if ((!$tryoembed || $simplehtml) && !in_array($simplehtml, [3, 7])) {
		$Text = preg_replace("/([#@!])\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism", '$1$3', $Text);
	} elseif ($simplehtml == 3) {
		$Text = preg_replace("/([@!])\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
			'$1<a href="$2">$3</a>',
			$Text);
	} elseif ($simplehtml == 7) {
		$Text = preg_replace("/([@!])\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
			'$1<span class="vcard"><a href="$2" class="url" title="$3"><span class="fn nickname mention">$3</span></a></span>',
			$Text);
	} elseif (!$simplehtml) {
		$Text = preg_replace("/([@!])\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
			'$1<a href="$2" class="userinfo mention" title="$3">$3</a>',
			$Text);
	}

	// Bookmarks in red - will be converted to bookmarks in friendica
	$Text = preg_replace("/#\^\[url\]([$URLSearchString]*)\[\/url\]/ism", '[bookmark=$1]$1[/bookmark]', $Text);
	$Text = preg_replace("/#\^\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism", '[bookmark=$1]$2[/bookmark]', $Text);
	$Text = preg_replace("/#\[url\=[$URLSearchString]*\]\^\[\/url\]\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/i",
				"[bookmark=$1]$2[/bookmark]", $Text);

	if (in_array($simplehtml, [2, 6, 7, 8, 9])) {
		$Text = preg_replace_callback("/([^#@!])\[url\=([^\]]*)\](.*?)\[\/url\]/ism", "bb_expand_links", $Text);
		//$Text = preg_replace("/[^#@!]\[url\=([^\]]*)\](.*?)\[\/url\]/ism", ' $2 [url]$1[/url]', $Text);
		$Text = preg_replace("/\[bookmark\=([^\]]*)\](.*?)\[\/bookmark\]/ism", ' $2 [url]$1[/url]',$Text);
	}

	if ($simplehtml == 5) {
		$Text = preg_replace("/[^#@!]\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism", '[url]$1[/url]', $Text);
	}

	// Perform URL Search
	if ($tryoembed) {
		$Text = preg_replace_callback("/\[bookmark\=([^\]]*)\](.*?)\[\/bookmark\]/ism", $tryoembed_callback, $Text);
	}

	if ($simplehtml == 5) {
		$Text = preg_replace("/\[bookmark\=([^\]]*)\](.*?)\[\/bookmark\]/ism", '[url]$1[/url]', $Text);
	} else {
		$Text = preg_replace("/\[bookmark\=([^\]]*)\](.*?)\[\/bookmark\]/ism", '[url=$1]$2[/url]', $Text);
	}

	// Handle Diaspora posts
	$Text = preg_replace_callback("&\[url=/posts/([^\[\]]*)\](.*)\[\/url\]&Usi", 'bb_DiasporaLinks', $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, System::baseUrl()."/display/$1", $Text);

	$Text = preg_replace("/([#])\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism",
				'$1<a href="' . System::baseUrl() . '/search?tag=$3" class="tag" title="$3">$3</a>', $Text);

	$Text = preg_replace("/\[url\=([$URLSearchString]*)\]#(.*?)\[\/url\]/ism",
				'#<a href="' . System::baseUrl() . '/search?tag=$2" class="tag" title="$2">$2</a>', $Text);

	$Text = preg_replace("/\[url\]([$URLSearchString]*)\[\/url\]/ism", '<a href="$1" target="_blank">$1</a>', $Text);
	$Text = preg_replace("/\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism", '<a href="$1" target="_blank">$2</a>', $Text);
	//$Text = preg_replace("/\[url\=([$URLSearchString]*)\]([$URLSearchString]*)\[\/url\]/ism", '<a href="$1" target="_blank">$2</a>', $Text);

	// Red compatibility, though the link can't be authenticated on Friendica
	$Text = preg_replace("/\[zrl\=([$URLSearchString]*)\](.*?)\[\/zrl\]/ism", '<a href="$1" target="_blank">$2</a>', $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})/', '<a href="' . System::baseUrl() . '/acctlink?addr=$1@$2" target="extlink">acct:$1@$2</a>', $Text);

	// Perform MAIL Search
	$Text = preg_replace("/\[mail\]([$MAILSearchString]*)\[\/mail\]/", '<a href="mailto:$1">$1</a>', $Text);
	$Text = preg_replace("/\[mail\=([$MAILSearchString]*)\](.*?)\[\/mail\]/", '<a href="mailto:$1">$2</a>', $Text);

	// leave open the posibility of [map=something]
	// this is replaced in prepare_body() which has knowledge of the item location

	if (strpos($Text, '[/map]') !== false) {
		$Text = preg_replace_callback("/\[map\](.*?)\[\/map\]/ism", 'bb_map_location', $Text);
	}
	if (strpos($Text, '[map=') !== false) {
		$Text = preg_replace_callback("/\[map=(.*?)\]/ism", 'bb_map_coords', $Text);
	}
	if (strpos($Text, '[map]') !== false) {
		$Text = preg_replace("/\[map\]/", '<div class="map"></div>', $Text);
	}

	// Check for headers
	$Text = preg_replace("(\[h1\](.*?)\[\/h1\])ism", '<h1>$1</h1>', $Text);
	$Text = preg_replace("(\[h2\](.*?)\[\/h2\])ism", '<h2>$1</h2>', $Text);
	$Text = preg_replace("(\[h3\](.*?)\[\/h3\])ism", '<h3>$1</h3>', $Text);
	$Text = preg_replace("(\[h4\](.*?)\[\/h4\])ism", '<h4>$1</h4>', $Text);
	$Text = preg_replace("(\[h5\](.*?)\[\/h5\])ism", '<h5>$1</h5>', $Text);
	$Text = preg_replace("(\[h6\](.*?)\[\/h6\])ism", '<h6>$1</h6>', $Text);

	// Check for paragraph
	$Text = preg_replace("(\[p\](.*?)\[\/p\])ism", '<p>$1</p>', $Text);

	// Check for bold text
	$Text = preg_replace("(\[b\](.*?)\[\/b\])ism", '<strong>$1</strong>', $Text);

	// Check for Italics text
	$Text = preg_replace("(\[i\](.*?)\[\/i\])ism", '<em>$1</em>', $Text);

	// Check for Underline text
	$Text = preg_replace("(\[u\](.*?)\[\/u\])ism", '<u>$1</u>', $Text);

	// Check for strike-through text
	$Text = preg_replace("(\[s\](.*?)\[\/s\])ism", '<strike>$1</strike>', $Text);

	// Check for over-line text
	$Text = preg_replace("(\[o\](.*?)\[\/o\])ism", '<span class="overline">$1</span>', $Text);

	// Check for colored text
	$Text = preg_replace("(\[color=(.*?)\](.*?)\[\/color\])ism", "<span style=\"color: $1;\">$2</span>", $Text);

	// Check for sized text
	// [size=50] --> font-size: 50px (with the unit).
	$Text = preg_replace("(\[size=(\d*?)\](.*?)\[\/size\])ism", "<span style=\"font-size: $1px; line-height: initial;\">$2</span>", $Text);
	$Text = preg_replace("(\[size=(.*?)\](.*?)\[\/size\])ism", "<span style=\"font-size: $1; line-height: initial;\">$2</span>", $Text);

	// Check for centered text
	$Text = preg_replace("(\[center\](.*?)\[\/center\])ism", "<div style=\"text-align:center;\">$1</div>", $Text);

	// Check for list text
	$Text = str_replace("[*]", "<li>", $Text);

	// Check for style sheet commands
	$Text = preg_replace_callback("(\[style=(.*?)\](.*?)\[\/style\])ism", "bb_cleanstyle", $Text);

	// Check for CSS classes
	$Text = preg_replace_callback("(\[class=(.*?)\](.*?)\[\/class\])ism", "bb_cleanclass", $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", '<ul class="listbullet" style="list-style-type: circle;">$1</ul>', $Text);
		$Text = preg_replace("/\[list=\](.*?)\[\/list\]/ism", '<ul class="listnone" style="list-style-type: none;">$1</ul>', $Text);
		$Text = preg_replace("/\[list=1\](.*?)\[\/list\]/ism", '<ul class="listdecimal" style="list-style-type: decimal;">$1</ul>', $Text);
		$Text = preg_replace("/\[list=((?-i)i)\](.*?)\[\/list\]/ism", '<ul class="listlowerroman" style="list-style-type: lower-roman;">$2</ul>', $Text);
		$Text = preg_replace("/\[list=((?-i)I)\](.*?)\[\/list\]/ism", '<ul class="listupperroman" style="list-style-type: upper-roman;">$2</ul>', $Text);
		$Text = preg_replace("/\[list=((?-i)a)\](.*?)\[\/list\]/ism", '<ul class="listloweralpha" style="list-style-type: lower-alpha;">$2</ul>', $Text);
		$Text = preg_replace("/\[list=((?-i)A)\](.*?)\[\/list\]/ism", '<ul class="listupperalpha" style="list-style-type: upper-alpha;">$2</ul>', $Text);
		$Text = preg_replace("/\[ul\](.*?)\[\/ul\]/ism", '<ul class="listbullet" style="list-style-type: circle;">$1</ul>', $Text);
		$Text = preg_replace("/\[ol\](.*?)\[\/ol\]/ism", '<ul class="listdecimal" style="list-style-type: decimal;">$1</ul>', $Text);
		$Text = preg_replace("/\[li\](.*?)\[\/li\]/ism", '<li>$1</li>', $Text);
	}

	$Text = preg_replace("/\[th\](.*?)\[\/th\]/sm", '<th>$1</th>', $Text);
	$Text = preg_replace("/\[td\](.*?)\[\/td\]/sm", '<td>$1</td>', $Text);
	$Text = preg_replace("/\[tr\](.*?)\[\/tr\]/sm", '<tr>$1</tr>', $Text);
	$Text = preg_replace("/\[table\](.*?)\[\/table\]/sm", '<table>$1</table>', $Text);

	$Text = preg_replace("/\[table border=1\](.*?)\[\/table\]/sm", '<table border="1" >$1</table>', $Text);
	$Text = preg_replace("/\[table border=0\](.*?)\[\/table\]/sm", '<table border="0" >$1</table>', $Text);

	$Text = str_replace('[hr]', '<hr />', $Text);

	// This is actually executed in prepare_body()

	$Text = str_replace('[nosmile]', '', $Text);

	// Check for font change text
	$Text = preg_replace("/\[font=(.*?)\](.*?)\[\/font\]/sm", "<span style=\"font-family: $1;\">$2</span>", $Text);

	// Declare the format for [code] layout

//	$Text = preg_replace_callback("/\[code\](.*?)\[\/code\]/ism", 'stripcode_br_cb', $Text);

	$CodeLayout = '<code>$1</code>';
	// Check for [code] text
	$Text = preg_replace("/\[code\](.*?)\[\/code\]/ism", "$CodeLayout", $Text);

	// Declare the format for [spoiler] layout
	$SpoilerLayout = '<blockquote class="spoiler">$1</blockquote>';

	// 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=Author] text

	$t_wrote = L10n::t('$1 wrote:');

	// handle nested quotes
	$endlessloop = 0;
	while ((strpos($Text, "[/spoiler]")!== false)  && (strpos($Text, "[spoiler=") !== false) && (++$endlessloop < 20)) {
		$Text = preg_replace("/\[spoiler=[\"\']*(.*?)[\"\']*\](.*?)\[\/spoiler\]/ism",
				     "<br /><strong class=".'"spoiler"'.">" . $t_wrote . "</strong><blockquote class=".'"spoiler"'.">$2</blockquote>",
				     $Text);
	}

	// Declare the format for [quote] layout
	$QuoteLayout = '<blockquote>$1</blockquote>';

	// 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 = 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",
				     "<br /><strong class=".'"author"'.">" . $t_wrote . "</strong><blockquote>$2</blockquote>",
				     $Text);
	}


	// [img=widthxheight]image source[/img]
	$Text = preg_replace_callback("/\[img\=([0-9]*)x([0-9]*)\](.*?)\[\/img\]/ism", 'bb_PictureCacheExt', $Text);

	$Text = preg_replace("/\[img\=([0-9]*)x([0-9]*)\](.*?)\[\/img\]/ism", '<img src="$3" style="width: $1px;" >', $Text);
	$Text = preg_replace("/\[zmg\=([0-9]*)x([0-9]*)\](.*?)\[\/zmg\]/ism", '<img class="zrl" src="$3" style="width: $1px;" >', $Text);

	// Images
	// [img]pathtoimage[/img]
	$Text = preg_replace_callback("/\[img\](.*?)\[\/img\]/ism", 'bb_PictureCache', $Text);

	$Text = preg_replace("/\[img\](.*?)\[\/img\]/ism", '<img src="$1" alt="' . L10n::t('Image/photo') . '" />', $Text);
	$Text = preg_replace("/\[zmg\](.*?)\[\/zmg\]/ism", '<img src="$1" alt="' . L10n::t('Image/photo') . '" />', $Text);

	// Shared content
	$Text = preg_replace_callback("/(.*?)\[share(.*?)\](.*?)\[\/share\]/ism",
		function ($match) use ($simplehtml) {
			return bb_ShareAttributes($match, $simplehtml);
		}, $Text);

	$Text = preg_replace("/\[crypt\](.*?)\[\/crypt\]/ism", '<br/><img src="' .System::baseUrl() . '/images/lock_icon.gif" alt="' . L10n::t('Encrypted content') . '" title="' . L10n::t('Encrypted content') . '" /><br />', $Text);
	$Text = preg_replace("/\[crypt(.*?)\](.*?)\[\/crypt\]/ism", '<br/><img src="' .System::baseUrl() . '/images/lock_icon.gif" alt="' . L10n::t('Encrypted content') . '" title="' . '$1' . ' ' . L10n::t('Encrypted content') . '" /><br />', $Text);
	//$Text = preg_replace("/\[crypt=(.*?)\](.*?)\[\/crypt\]/ism", '<br/><img src="' .System::baseUrl() . '/images/lock_icon.gif" alt="' . L10n::t('Encrypted content') . '" title="' . '$1' . ' ' . L10n::t('Encrypted content') . '" /><br />', $Text);

	// Try to Oembed
	if ($tryoembed) {
		$Text = preg_replace("/\[video\](.*?\.(ogg|ogv|oga|ogm|webm|mp4))\[\/video\]/ism", '<video src="$1" controls="controls" width="' . $a->videowidth . '" height="' . $a->videoheight . '" loop="true"><a href="$1">$1</a></video>', $Text);
		$Text = preg_replace("/\[audio\](.*?\.(ogg|ogv|oga|ogm|webm|mp4|mp3))\[\/audio\]/ism", '<audio src="$1" controls="controls"><a href="$1">$1</a></audio>', $Text);

		$Text = preg_replace_callback("/\[video\](.*?)\[\/video\]/ism", $tryoembed_callback, $Text);
		$Text = preg_replace_callback("/\[audio\](.*?)\[\/audio\]/ism", $tryoembed_callback, $Text);
	} else {
		$Text = preg_replace("/\[video\](.*?)\[\/video\]/",
					'<a href="$1" target="_blank">$1</a>', $Text);
		$Text = preg_replace("/\[audio\](.*?)\[\/audio\]/",
					'<a href="$1" target="_blank">$1</a>', $Text);
	}

	// html5 video and audio


	if ($tryoembed) {
		$Text = preg_replace("/\[iframe\](.*?)\[\/iframe\]/ism", '<iframe src="$1" width="' . $a->videowidth . '" height="' . $a->videoheight . '"><a href="$1">$1</a></iframe>', $Text);
	} else {
		$Text = preg_replace("/\[iframe\](.*?)\[\/iframe\]/ism", '<a href="$1">$1</a>', $Text);
	}

	// Youtube extensions
	if ($tryoembed) {
		$Text = preg_replace_callback("/\[youtube\](https?:\/\/www.youtube.com\/watch\?v\=.*?)\[\/youtube\]/ism", $tryoembed_callback, $Text);
		$Text = preg_replace_callback("/\[youtube\](www.youtube.com\/watch\?v\=.*?)\[\/youtube\]/ism", $tryoembed_callback, $Text);
		$Text = preg_replace_callback("/\[youtube\](https?:\/\/youtu.be\/.*?)\[\/youtube\]/ism", $tryoembed_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?:\/\/youtu.be\/(.*?)\[\/youtube\]/ism", '[youtube]$1[/youtube]', $Text);

	if ($tryoembed) {
		$Text = preg_replace("/\[youtube\]([A-Za-z0-9\-_=]+)(.*?)\[\/youtube\]/ism", '<iframe width="' . $a->videowidth . '" height="' . $a->videoheight . '" src="https://www.youtube.com/embed/$1" frameborder="0" ></iframe>', $Text);
	} else {
		$Text = preg_replace("/\[youtube\]([A-Za-z0-9\-_=]+)(.*?)\[\/youtube\]/ism",
					'<a href="https://www.youtube.com/watch?v=$1" target="_blank">https://www.youtube.com/watch?v=$1</a>', $Text);
	}

	if ($tryoembed) {
		$Text = preg_replace_callback("/\[vimeo\](https?:\/\/player.vimeo.com\/video\/[0-9]+).*?\[\/vimeo\]/ism", $tryoembed_callback, $Text);
		$Text = preg_replace_callback("/\[vimeo\](https?:\/\/vimeo.com\/[0-9]+).*?\[\/vimeo\]/ism", $tryoembed_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 ($tryoembed) {
		$Text = preg_replace("/\[vimeo\]([0-9]+)(.*?)\[\/vimeo\]/ism", '<iframe width="' . $a->videowidth . '" height="' . $a->videoheight . '" src="https://player.vimeo.com/video/$1" frameborder="0" ></iframe>', $Text);
	} else {
		$Text = preg_replace("/\[vimeo\]([0-9]+)(.*?)\[\/vimeo\]/ism",
					'<a href="https://vimeo.com/$1" target="_blank">https://vimeo.com/$1</a>', $Text);
	}

//	$Text = preg_replace("/\[youtube\](.*?)\[\/youtube\]/", '<object width="425" height="350" type="application/x-shockwave-flash" data="http://www.youtube.com/v/$1" ><param name="movie" value="http://www.youtube.com/v/$1"></param><!--[if IE]><embed src="http://www.youtube.com/v/$1" type="application/x-shockwave-flash" width="425" height="350" /><![endif]--></object>', $Text);

	// oembed tag
	$Text = OEmbed::BBCode2HTML($Text);

	// Avoid triple linefeeds through oembed
	$Text = str_replace("<br style='clear:left'></span><br /><br />", "<br style='clear:left'></span><br />", $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 ((x($ev, 'desc') || x($ev, 'summary')) && x($ev, 'start')) {
		$sub = format_event_html($ev, $simplehtml);

		$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("/\[event\-adjust\](.*?)\[\/event\-adjust\]/ism", '', $Text);
		$Text = preg_replace("/\[event\-id\](.*?)\[\/event\-id\]/ism", '', $Text);
	}

	// Replace non graphical smilies for external posts
	if ($simplehtml) {
		$Text = Smilies::replace($Text, false, true);
	}

	// Replace inline code blocks
	$Text = preg_replace_callback("|(?!<br[^>]*>)<code>([^<]*)</code>(?!<br[^>]*>)|ism",
		function ($match) use ($simplehtml) {
			$return = '<key>' . $match[1] . '</key>';
			// Use <code> for Diaspora inline code blocks
			if ($simplehtml === 3) {
				$return = '<code>' . $match[1] . '</code>';
			}
			return $return;
		}
	, $Text);

	// Unhide all [noparse] contained bbtags unspacefying them
	// and triming the [noparse] tag.

	$Text = preg_replace_callback("/\[noparse\](.*?)\[\/noparse\]/ism", 'bb_unspacefy_and_trim', $Text);
	$Text = preg_replace_callback("/\[nobb\](.*?)\[\/nobb\]/ism", 'bb_unspacefy_and_trim', $Text);
	$Text = preg_replace_callback("/\[pre\](.*?)\[\/pre\]/ism", 'bb_unspacefy_and_trim', $Text);


	$Text = preg_replace('/\[\&amp\;([#a-z0-9]+)\;\]/', '&$1;', $Text);
	$Text = preg_replace('/\&\#039\;/', '\'', $Text);
	$Text = preg_replace('/\&quot\;/', '"', $Text);

	// fix any escaped ampersands that may have been converted into links
	$Text = preg_replace('/\<([^>]*?)(src|href)=(.*?)\&amp\;(.*?)\>/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)
	static $allowed_src_protocols = ['http', 'redir', 'cid'];
	$Text = preg_replace('#<([^>]*?)(src)="(?!' . implode('|', $allowed_src_protocols) . ')(.*?)"(.*?)>#ism',
			     '<$1$2=""$4 data-original-src="$3" class="invalid-src" title="' . L10n::t('Invalid source protocol') . '">', $Text);

	// sanitize href attributes (only whitelisted protocols URLs)
	// default value for backward compatibility
	$allowed_link_protocols = Config::get('system', 'allowed_link_protocols', ['ftp', 'mailto', 'gopher', 'cid']);

	// Always allowed protocol even if config isn't set or not including it
	$allowed_link_protocols[] = 'http';
	$allowed_link_protocols[] = 'redir/';

	$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="' . L10n::t('Invalid link protocol') . '">', $Text);

	if ($saved_image) {
		$Text = bb_replace_images($Text, $saved_image);
	}

	// Clean up the HTML by loading and saving the HTML with the DOM.
	// Bad structured html can break a whole page.
	// For performance reasons do it only with ativated item cache or at export.
	if (!$tryoembed || (get_itemcachepath() != "")) {
		$doc = new DOMDocument();
		$doc->preserveWhiteSpace = false;

		$Text = mb_convert_encoding($Text, 'HTML-ENTITIES', "UTF-8");

		$doctype = '<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" "http://www.w3.org/TR/REC-html40/loose.dtd">';
		$encoding = '<?xml encoding="UTF-8">';
		@$doc->loadHTML($encoding.$doctype."<html><body>".$Text."</body></html>");
		$doc->encoding = 'UTF-8';
		$Text = $doc->saveHTML();
		$Text = str_replace(["<html><body>", "</body></html>", $doctype, $encoding], ["", "", "", ""], $Text);

		$Text = str_replace('<br></li>', '</li>', $Text);

		//$Text = mb_convert_encoding($Text, "UTF-8", 'HTML-ENTITIES');
	}

	// Clean up some useless linebreaks in lists
	//$Text = str_replace('<br /><ul', '<ul ', $Text);
	//$Text = str_replace('</ul><br />', '</ul>', $Text);
	//$Text = str_replace('</li><br />', '</li>', $Text);
	//$Text = str_replace('<br /><li>', '<li>', $Text);
	//$Text = str_replace('<br /><ul', '<ul ', $Text);

	Addon::callHooks('bbcode', $Text);

	return trim($Text);
}

/**
 * @brief Removes the "abstract" element from the text
 *
 * @param string $text The text with BBCode
 * @return string The same text - but without "abstract" element
 */
function remove_abstract($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;
}

/**
 * @brief Returns the value of the "abstract" element
 *
 * @param string $text The text that maybe contains the element
 * @param string $addon The addon for which the abstract is meant for
 * @return string The abstract
 */
function fetch_abstract($text, $addon = "") {
	$abstract = "";
	$abstracts = [];
	$addon = strtolower($addon);

	if (preg_match_all("/\[abstract=(.*?)\](.*?)\[\/abstract\]/ism",$text, $results, PREG_SET_ORDER))
		foreach ($results AS $result)
			$abstracts[strtolower($result[1])] = $result[2];

	if (isset($abstracts[$addon]))
		$abstract = $abstracts[$addon];

	if ($abstract == "")
		if (preg_match("/\[abstract\](.*?)\[\/abstract\]/ism",$text, $result))
			$abstract = $result[1];

	return $abstract;
}