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<?php
require_once("include/oembed.php");
require_once('include/event.php');
require_once('library/markdown.php');
require_once('include/html2bbcode.php');
// we don't want to support a bbcode specific markdown interpreter
// and the markdown library we have is pretty good, but provides HTML output.
// So we'll use that to convert to HTML, then convert the HTML back to bbcode,
// and then clean up a few Diaspora specific constructs.
function diaspora2bb($s) {
// for testing purposes: Collect raw markdown articles
// $file = tempnam("/tmp/friendica/", "markdown");
// file_put_contents($file, $s);
$s = html_entity_decode($s,ENT_COMPAT,'UTF-8');
// Too many new lines. So deactivated the following line
// $s = str_replace("\r","\n",$s);
// Simply remove cr.
$s = str_replace("\r","",$s);
// <br/> is invalid. Replace it with the valid expression
$s = str_replace("<br/>","<br />",$s);
$s = preg_replace('/\@\{(.+?)\; (.+?)\@(.+?)\}/','@[url=https://$3/u/$2]$1[/url]',$s);
// Escaping the hash tags - doesn't always seem to work
// $s = preg_replace('/\#([^\s\#])/','\\#$1',$s);
// This seems to work
$s = preg_replace('/\#([^\s\#])/','#$1',$s);
$s = Markdown($s);
$s = str_replace('#','#',$s);
$s = str_replace("\n",'<br />',$s);
$s = html2bbcode($s);
// $s = str_replace('*','*',$s);
// Convert everything that looks like a link to a link
$s = preg_replace("/([^\]\=]|^)(https?\:\/\/)([a-zA-Z0-9\:\/\-\?\&\;\.\=\_\~\#\%\$\!\+\,]+)/ism", '$1[url=$2$3]$2$3[/url]',$s);
//$s = preg_replace("/([^\]\=]|^)(https?\:\/\/)(vimeo|youtu|www\.youtube|soundcloud)([a-zA-Z0-9\:\/\-\?\&\;\.\=\_\~\#\%\$\!\+\,]+)/ism", '$1[url=$2$3$4]$2$3$4[/url]',$s);
$s = preg_replace("/\[url\=?(.*?)\]https?:\/\/www.youtube.com\/watch\?v\=(.*?)\[\/url\]/ism",'[youtube]$2[/youtube]',$s);
$s = preg_replace("/\[url\=https?:\/\/www.youtube.com\/watch\?v\=(.*?)\].*?\[\/url\]/ism",'[youtube]$1[/youtube]',$s);
$s = preg_replace("/\[url\=?(.*?)\]https?:\/\/vimeo.com\/([0-9]+)(.*?)\[\/url\]/ism",'[vimeo]$2[/vimeo]',$s);
$s = preg_replace("/\[url\=https?:\/\/vimeo.com\/([0-9]+)\](.*?)\[\/url\]/ism",'[vimeo]$1[/vimeo]',$s);
// remove duplicate adjacent code tags
$s = preg_replace("/(\[code\])+(.*?)(\[\/code\])+/ism","[code]$2[/code]", $s);
// Don't show link to full picture (until it is fixed)
$s = scale_external_images($s, false);
return $s;
}
function stripdcode_br_cb($s) {
return '[code]' . str_replace('<br />', "\n\t", $s[1]) . '[/code]';
}
function diaspora_ul($s) {
// Replace "[\\*]" followed by any number (including zero) of
// spaces by "* " to match Diaspora's list format
return preg_replace("/\[\\\\\*\]( *)/", "* ", $s[1]);
}
function diaspora_ol($s) {
// A hack: Diaspora will create a properly-numbered ordered list even
// if you use '1.' for each element of the list, like:
// 1. First element
// 1. Second element
// 1. Third element
return preg_replace("/\[\\\\\*\]( *)/", "1. ", $s[1]);
}
function bb2diaspora($Text,$preserve_nl = false) {
$ev = bbtoevent($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("<", "<", $Text);
$Text = str_replace(">", ">", $Text);
// If we find any event code, turn it into an event.
// After we're finished processing the bbcode we'll
// replace all of the event code with a reformatted version.
if($preserve_nl)
$Text = str_replace(array("\n","\r"), array('',''),$Text);
else
// Remove the "return" character, as Diaspora uses only the "newline"
// character, so having the "return" character can cause signature
// failures
$Text = str_replace("\r", "", $Text);
// Set up the parameters for a URL search string
$URLSearchString = "^\[\]";
// Set up the parameters for a MAIL search string
$MAILSearchString = $URLSearchString;
// Perform URL Search
// [img]pathtoimage[/img]
// the following was added on 10-January-2012 due to an inability of Diaspora's
// new javascript markdown processor to handle links with images as the link "text"
// It is not optimal and may be removed if this ability is restored in the future
$Text = preg_replace("/\[url\=([$URLSearchString]*)\]\[img\](.*?)\[\/img\]\[\/url\]/ism",
'' . "\n" . '[' . t('link') . '](' . '$1' . ')', $Text);
$Text = preg_replace("/\[bookmark\]([$URLSearchString]*)\[\/bookmark\]/ism", '[$1]($1)', $Text);
$Text = preg_replace("/\[bookmark\=([$URLSearchString]*)\](.*?)\[\/bookmark\]/ism", '[$2]($1)', $Text);
$Text = preg_replace("/\[url\]([$URLSearchString]*)\[\/url\]/ism", '[$1]($1)', $Text);
$Text = preg_replace("/\#\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism", '[#$2]($1)', $Text);
$Text = preg_replace("/\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism", '[$2]($1)', $Text);
$Text = preg_replace("/\[img\](.*?)\[\/img\]/", '', $Text);
$Text = preg_replace("/\[img\=(.*?)\](.*?)\[\/img\]/", '', $Text);
// Perform MAIL Search
$Text = preg_replace("(\[mail\]([$MAILSearchString]*)\[/mail\])", '[$1](mailto:$1)', $Text);
$Text = preg_replace("/\[mail\=([$MAILSearchString]*)\](.*?)\[\/mail\]/", '[$2](mailto:$1)', $Text);
$Text = str_replace('*', '\\*', $Text);
$Text = str_replace('_', '\\_', $Text);
$Text = str_replace('`','\\`', $Text);
// Check for bold text
$Text = preg_replace("(\[b\](.*?)\[\/b\])is",'**$1**',$Text);
// Check for italics text
$Text = preg_replace("(\[i\](.*?)\[\/i\])is",'_$1_',$Text);
// Check for underline text
// Replace with italics since Diaspora doesn't have underline
$Text = preg_replace("(\[u\](.*?)\[\/u\])is",'_$1_',$Text);
// Check for strike-through text
$Text = preg_replace("(\[s\](.*?)\[\/s\])is",'**[strike]**$1**[/strike]**',$Text);
// Check for over-line text
// $Text = preg_replace("(\[o\](.*?)\[\/o\])is",'<span class="overline">$1</span>',$Text);
// Check for colored text
// Remove color since Diaspora doesn't support it
$Text = preg_replace("(\[color=(.*?)\](.*?)\[\/color\])is","$2",$Text);
// Check for sized text
// Remove it since Diaspora doesn't support sizes very well
$Text = preg_replace("(\[size=(.*?)\](.*?)\[\/size\])is","$2",$Text);
// Check for list text
$Text = preg_replace_callback("/\[list\](.*?)\[\/list\]/is", 'diaspora_ul', $Text);
$Text = preg_replace_callback("/\[ul\](.*?)\[\/ul\]/is", 'diaspora_ul', $Text);
$Text = preg_replace_callback("/\[list=1\](.*?)\[\/list\]/is", 'diaspora_ol', $Text);
$Text = preg_replace_callback("/\[list=i\](.*?)\[\/list\]/s",'diaspora_ol', $Text);
$Text = preg_replace_callback("/\[list=I\](.*?)\[\/list\]/s", 'diaspora_ol', $Text);
$Text = preg_replace_callback("/\[list=a\](.*?)\[\/list\]/s", 'diaspora_ol', $Text);
$Text = preg_replace_callback("/\[list=A\](.*?)\[\/list\]/s", 'diaspora_ol', $Text);
$Text = preg_replace_callback("/\[ol\](.*?)\[\/ol\]/is", 'diaspora_ol', $Text);
// $Text = preg_replace("/\[li\](.*?)\[\/li\]/s", '<li>$1</li>' ,$Text);
// Just get rid of table tags since Diaspora doesn't support tables
$Text = preg_replace("/\[th\](.*?)\[\/th\]/s", '$1' ,$Text);
$Text = preg_replace("/\[td\](.*?)\[\/td\]/s", '$1' ,$Text);
$Text = preg_replace("/\[tr\](.*?)\[\/tr\]/s", '$1' ,$Text);
$Text = preg_replace("/\[table\](.*?)\[\/table\]/s", '$1' ,$Text);
$Text = preg_replace("/\[table border=(.*?)\](.*?)\[\/table\]/s", '$2' ,$Text);
// $Text = preg_replace("/\[table border=0\](.*?)\[\/table\]/s", '<table border="0" >$1</table>' ,$Text);
// $Text = str_replace("[*]", "<li>", $Text);
// Check for font change text
// $Text = preg_replace("(\[font=(.*?)\](.*?)\[\/font\])","<span style=\"font-family: $1;\">$2</span>",$Text);
$Text = preg_replace_callback("/\[code\](.*?)\[\/code\]/is",'stripdcode_br_cb',$Text);
// Check for [code] text
$Text = preg_replace("/(\[code\])+(.*?)(\[\/code\])+/is","\t$2\n", $Text);
// Declare the format for [quote] layout
// $QuoteLayout = '<blockquote>$1</blockquote>';
// Check for [quote] text
$Text = preg_replace("/\[quote\](.*?)\[\/quote\]/is",">$1\n\n", $Text);
$Text = preg_replace("/\[quote=(.*?)\](.*?)\[\/quote\]/is",">$2\n\n", $Text);
// Images
// html5 video and audio
$Text = preg_replace("/\[video\](.*?)\[\/video\]/", '$1', $Text);
$Text = preg_replace("/\[audio\](.*?)\[\/audio\]/", '$1', $Text);
// $Text = preg_replace("/\[iframe\](.*?)\[\/iframe\]/", '<iframe src="$1" width="425" height="350"><a href="$1">$1</a></iframe>', $Text);
// [img=widthxheight]image source[/img]
// $Text = preg_replace("/\[img\=([0-9]*)x([0-9]*)\](.*?)\[\/img\]/", '<img src="$3" style="height:{$2}px; width:{$1}px;" >', $Text);
$Text = preg_replace("/\[youtube\]https?:\/\/www.youtube.com\/watch\?v\=(.*?)\[\/youtube\]/ism",'http://www.youtube.com/watch?v=$1',$Text);
$Text = preg_replace("/\[youtube\]https?:\/\/www.youtube.com\/embed\/(.*?)\[\/youtube\]/ism",'http://www.youtube.com/watch?v=$1',$Text);
$Text = preg_replace("/\[youtube\]https?:\/\/youtu.be\/(.*?)\[\/youtube\]/ism",'http://www.youtube.com/watch?v=$1',$Text);
$Text = preg_replace("/\[youtube\]([A-Za-z0-9\-_=]+)(.*?)\[\/youtube\]/ism", 'http://www.youtube.com/watch?v=$1', $Text);
$Text = preg_replace("/\[vimeo\]https?:\/\/player.vimeo.com\/video\/([0-9]+)(.*?)\[\/vimeo\]/ism",'http://vimeo.com/$1',$Text);
$Text = preg_replace("/\[vimeo\]https?:\/\/vimeo.com\/([0-9]+)(.*?)\[\/vimeo\]/ism",'http://vimeo.com/$1',$Text);
$Text = preg_replace("/\[vimeo\]([0-9]+)(.*?)\[\/vimeo\]/ism", 'http://vimeo.com/$1',$Text);
$Text = str_replace('[nosmile]','',$Text);
// oembed tag
// $Text = oembed_bbcode2html($Text);
// If we found an event earlier, strip out all the event code and replace with a reformatted version.
if(x($ev,'desc') && x($ev,'start')) {
$sub = format_event_diaspora($ev);
$Text = preg_replace("/\[event\-description\](.*?)\[\/event\-description\]/is",$sub,$Text);
$Text = preg_replace("/\[event\-start\](.*?)\[\/event\-start\]/is",'',$Text);
$Text = preg_replace("/\[event\-finish\](.*?)\[\/event\-finish\]/is",'',$Text);
$Text = preg_replace("/\[event\-location\](.*?)\[\/event\-location\]/is",'',$Text);
$Text = preg_replace("/\[event\-adjust\](.*?)\[\/event\-adjust\]/is",'',$Text);
}
$Text = preg_replace("/\<(.*?)(src|href)=(.*?)\&\;(.*?)\>/ism",'<$1$2=$3&$4>',$Text);
$Text = preg_replace_callback('/\[(.*?)\]\((.*?)\)/ism','unescape_underscores_in_links',$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);
call_hooks('bb2diaspora',$Text);
return $Text;
}
function unescape_underscores_in_links($m) {
$y = str_replace('\\_','_', $m[2]);
return('[' . $m[1] . '](' . $y . ')');
}
function format_event_diaspora($ev) {
$a = get_app();
if(! ((is_array($ev)) && count($ev)))
return '';
$bd_format = t('l F d, Y \@ g:i A') ; // Friday January 18, 2011 @ 8 AM
$o = 'Friendica event notification:' . "\n";
$o .= '**' . bb2diaspora($ev['desc']) . '**' . "\n";
$o .= t('Starts:') . ' ' . '['
. (($ev['adjust']) ? day_translate(datetime_convert('UTC', 'UTC',
$ev['start'] , $bd_format ))
: day_translate(datetime_convert('UTC', 'UTC',
$ev['start'] , $bd_format)))
. '](' . $a->get_baseurl() . '/localtime/?f=&time=' . urlencode(datetime_convert('UTC','UTC',$ev['start'])) . ")\n";
if(! $ev['nofinish'])
$o .= t('Finishes:') . ' ' . '['
. (($ev['adjust']) ? day_translate(datetime_convert('UTC', 'UTC',
$ev['finish'] , $bd_format ))
: day_translate(datetime_convert('UTC', 'UTC',
$ev['finish'] , $bd_format )))
. '](' . $a->get_baseurl() . '/localtime/?f=&time=' . urlencode(datetime_convert('UTC','UTC',$ev['finish'])) . ")\n";
if(strlen($ev['location']))
$o .= t('Location:') . bb2diaspora($ev['location'])
. "\n";
$o .= "\n";
return $o;
}
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