friendica/include/bbcode.php

<?php
use \Friendica\Core\Config;

require_once 'include/oembed.php';
require_once 'include/event.php';
require_once 'include/map.php';
require_once 'mod/proxy.php';
require_once 'include/Contact.php';
require_once 'include/plaintext.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"  >' . generate_map(str_replace('/',' ',$match[1])) . '</div>', $match[0]);
}
function bb_map_location($match) {
	// the extra space in the following line is intentional
	return str_replace($match[0],'<div class="map"  >' . generate_named_map($match[1]) . '</div>', $match[0]);
}

function bb_attachment($Text, $simplehtml = false, $tryoembed = true) {

	$data = get_attachment_data($Text);
	if (!$data)
		return $Text;

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

	if (((strpos($data["text"], "[img=") !== false) OR (strpos($data["text"], "[img]") !== false)) AND ($data["image"] != "")) {
		$data["preview"] = $data["image"];
		$data["image"] = "";
	}

	if ($simplehtml == 7) {
		$title2 = $data["title"];

		$test1 = trim(html_entity_decode($data["text"],ENT_QUOTES,'UTF-8'));
		$test2 = trim(html_entity_decode($data["title"],ENT_QUOTES,'UTF-8'));

		// If the link description is similar to the text above then don't add the link description
		if (($data["title"] != "") AND ((strpos($test1,$test2) !== false) OR
			(similar_text($test1,$test2) / strlen($data["title"])) > 0.9))
			$title2 = $data["url"];
		$text = sprintf('<a href="%s" title="%s" class="attachment thumbnail" rel="nofollow external">%s</a><br />',
				$data["url"], $data["title"], $title2);
	} elseif (($simplehtml != 4) AND ($simplehtml != 0))
		$text = sprintf('<a href="%s" target="_blank">%s</a><br>', $data["url"], $data["title"]);
	else {
		$text = sprintf('<span class="type-%s">', $data["type"]);

		$bookmark = array(sprintf('[bookmark=%s]%s[/bookmark]', $data["url"], $data["title"]), $data["url"], $data["title"]);
		if ($tryoembed)
			$oembed = tryoembed($bookmark);
		else
			$oembed = $bookmark[0];

		if (strstr(strtolower($oembed), "<iframe "))
			$text = $oembed;
		else {
			if (($data["image"] != "") AND !strstr(strtolower($oembed), "<img "))
				$text .= 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"] != "") AND !strstr(strtolower($oembed), "<img "))
				$text .= 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 (($data["type"] == "photo") AND ($data["url"] != "") AND ($data["image"] != ""))
				$text .= 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
				$text .= $oembed;

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

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

	$data = get_attachment_data($Text);

	if (!$data)
		return $Text;

	if ($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 ($plaintext OR (($title != "") AND strstr($text, $title)))
		$data["title"] = $data["url"];
	elseif (($text != "") AND strstr($title, $text)) {
		$data["text"] = $data["title"];
		$data["title"] = $data["url"];
	}

	if (($data["text"] == "") AND ($data["title"] != "") AND ($data["url"] == ""))
		return $data["title"].$data["after"];

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

	$text = $data["text"];

	if (($data["url"] != "") AND ($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 (($char >= "a") and ($char <= "z"))
			$cleaned .= $char;

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

	return($cleaned);
}

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

function tryoembed($match) {
	$url = $match[1];

	// Always embed the SSL version
	$url = str_replace(array("http://www.youtube.com/", "http://player.vimeo.com/"),
				array("https://www.youtube.com/", "https://player.vimeo.com/"), $url);


	$o = oembed_fetch_url($url);

	if (!is_object($o))
		return $match[0];

	if (isset($match[2]))
		$o->title = $match[2];

	if ($o->type=="error") return $match[0];

	$html = oembed_format_object($o);
	return $html;
}

// [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) {
	$whole_match = $st[0];
	$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 = array( '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 = array( 'start' => array('open' => $start_open, 'close' => $start_close),
		      'end' => array('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;
}

if(! function_exists('bb_extract_images')) {
function bb_extract_images($body) {

	$saved_image = array();
	$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 array('body' => $new_body, 'images' => $saved_image);
}}

if(! function_exists('bb_replace_images')) {
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="' . t('Image/photo') . '" />', $newbody);
		$cnt++;
	}

	return $newbody;
}}

function bb_ShareAttributes($share, $simplehtml) {
	$attributes = $share[2];

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

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

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

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

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

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

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

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

	$posted = "";

	$itemcache = get_itemcachepath();

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

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

	// relative dates only make sense when they aren't cached
	if ($itemcache == "")
		$reldate = (($posted) ? " " . relative_date($posted) : '');

	// 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.
	get_contact($profile, 0);

	$data = get_contact_details_by_url($profile);

	if (isset($data["name"]) AND ($data["name"] != "") AND isset($data["addr"]) AND ($data["addr"] != ""))
	        $userid_compact = $data["name"]." (".$data["addr"].")";
	else
		$userid_compact = GetProfileUsername($profile,$author, true);

	if (isset($data["addr"]) AND ($data["addr"] != ""))
		$userid = $data["addr"];
	else
		$userid = GetProfileUsername($profile,$author, false);

	if (isset($data["name"]) AND ($data["name"] != ""))
		$author = $data["name"];

	if (isset($data["micro"]) AND ($data["micro"] != ""))
		$avatar = $data["micro"];

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

	if ($preshare != "")
		$preshare .= "<br /><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 (substr(normalise_link($link), 0, 19) != "http://twitter.com/") {
				$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 = '<div class="shared_header">';
			$headline .= '<span><b>'.html_entity_decode("&#x2672; ", ENT_QUOTES, 'UTF-8');
			$headline .= sprintf(t('<a href="%1$s" target="_blank">%2$s</a> %3$s'), $link, $userid, $posted);
			$headline .= ":</b></span></div>";

			$text = trim($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:
			$text = trim($share[1])."\n";

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

			$tpl = get_markup_template('shared_content.tpl');
			$text .= replace_macros($tpl,
					array(
						'$profile' => $profile,
						'$avatar' => $avatar,
						'$author' => $author,
						'$link' => $link,
						'$posted' => $posted,
						'$reldate' => $reldate,
						'$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) {
			$UserData = fetch_url("http://".$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($match) {
	return "[url=".App::get_baseurl()."/display/".$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 = array();

				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] == "") OR ($match[2] == $match[3]) OR stristr($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 = array();

				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();

	// 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'];