<?php /** * @file include/bb2diaspora.php * @brief Some functions for BB conversions for Diaspora protocol. */ require_once("include/oembed.php"); require_once("include/event.php"); require_once("library/markdown.php"); require_once("include/html2bbcode.php"); require_once("include/bbcode.php"); require_once("library/markdownify/markdownify.php"); function get_bb_tag_pos($s, $name, $occurance = 1) { if($occurance < 1) $occurance = 1; $start_open = -1; for($i = 1; $i <= $occurance; $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; $occurance = 1; $pos = get_bb_tag_pos($string, $name, $occurance); while($pos !== false && $occurance < 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; $occurance++; $pos = get_bb_tag_pos($string, $name, $occurance); } return $string; } function share_shield($m) { return str_replace($m[1],'!=+=+=!' . base64url_encode($m[1]) . '=+!=+!=',$m[0]); } function share_unshield($m) { $x = str_replace(array('!=+=+=!','=+!=+!='),array('',''),$m[1]); return str_replace($m[1], base64url_decode($x), $m[0]); } function diaspora_mention_callback($matches) { $webbie = $matches[2] . '@' . $matches[3]; $link = ''; if($webbie) { $r = q("select * from hubloc left join xchan on hubloc_hash = xchan_hash where hubloc_addr = '%s' limit 1", dbesc($webbie) ); if(! $r) { $x = discover_by_webbie($webbie); if($x) { $r = q("select * from hubloc left join xchan on hubloc_hash = xchan_hash where hubloc_addr = '%s' limit 1", dbesc($webbie) ); } } if($r) $link = $r[0]['xchan_url']; } if(! $link) $link = 'https://' . $matches[3] . '/u/' . $matches[2]; if($r && $r[0]['hubloc_network'] === 'zot') return '@[zrl=' . $link . ']' . trim($matches[1]) . ((substr($matches[0],-1,1) === '+') ? '+' : '') . '[/zrl]' ; else return '@[url=' . $link . ']' . trim($matches[1]) . ((substr($matches[0],-1,1) === '+') ? '+' : '') . '[/url]' ; } /** * @brief * * 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. * * @param string $s * @param boolean $use_zrl default false * @return string */ function diaspora2bb($s, $use_zrl = false) { $s = str_replace("
","\r",$s); $s = str_replace("
\n>","",$s); $s = html_entity_decode($s,ENT_COMPAT,'UTF-8'); // first try plustags $s = preg_replace_callback('/\@\{(.+?)\; (.+?)\@(.+?)\}\+/','diaspora_mention_callback',$s); $s = preg_replace_callback('/\@\{(.+?)\; (.+?)\@(.+?)\}/','diaspora_mention_callback',$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); $s = str_replace("\r","",$s); $s = str_replace('#','#',$s); $s = html2bbcode($s); // protect the recycle symbol from turning into a tag, but without unescaping angles and naked ampersands $s = str_replace('♲',html_entity_decode('♲',ENT_QUOTES,'UTF-8'),$s); // Convert everything that looks like a link to a link if($use_zrl) { $s = str_replace(array('[img','/img]'),array('[zmg','/zmg]'),$s); $s = preg_replace("/([^\]\=]|^)(https?\:\/\/)([a-zA-Z0-9\:\/\-\?\&\;\.\=\_\~\#\%\$\!\+\,]+)/ism", '$1[zrl=$2$3]$2$3[/zrl]',$s); } else { $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 = bb_tag_preg_replace("/\[url\=?(.*?)\]https?:\/\/www.youtube.com\/watch\?v\=(.*?)\[\/url\]/ism",'[embed]https://www.youtube.com/watch?v=$2[/embed]','url',$s); $s = bb_tag_preg_replace("/\[url\=https?:\/\/www.youtube.com\/watch\?v\=(.*?)\].*?\[\/url\]/ism",'[embed]https://www.youtube.com/watch?v=$1[/embed]','url',$s); $s = bb_tag_preg_replace("/\[url\=?(.*?)\]https?:\/ \/vimeo.com\/([0-9]+)(.*?)\[\/url\]/ism",'[embed]https://vimeo.com/$2[/embed]','url',$s); $s = bb_tag_preg_replace("/\[url\=https?:\/\/vimeo.com\/([0-9]+)\](.*?)\[\/url\]/ism",'[embed]https://vimeo.com/$1[/embed]','url',$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", $s[1]) . '[/code]'; } ////////////////////// // The following "diaspora_ul" and "diaspora_ol" are only appropriate for the // pre-Markdownify conversion. If Markdownify isn't used, use the non-Markdownify // versions below ////////////////////// /* function diaspora_ul($s) { // Replace "[*]" followed by any number (including zero) of // spaces by "* " to match Diaspora's list format if( strpos($s[0], "[list]") === 0 ) return '<ul class="listbullet" style="list-style-type: circle;">' . preg_replace("/\[\*\]( *)/", "* ", $s[1]) . '</ul>'; elseif( strpos($s[0], "[ul]") === 0 ) return '<ul class="listbullet" style="list-style-type: circle;">' . preg_replace("/\[\*\]( *)/", "* ", $s[1]) . '</ul>'; else return $s[0]; } function diaspora_ol($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 if( strpos($s[0], "[list=1]") === 0 ) return '<ul class="listdecimal" style="list-style-type: decimal;">' . preg_replace("/\[\*\]( *)/", "1. ", $s[1]) . '</ul>'; elseif( strpos($s[0], "[list=i]") === 0 ) return '<ul class="listlowerroman" style="list-style-type: lower-roman;">' . preg_replace("/\[\*\]( *)/", "1. ", $s[1]) . '</ul>'; elseif( strpos($s[0], "[list=I]") === 0 ) return '<ul class="listupperroman" style="list-style-type: upper-roman;">' . preg_replace("/\[\*\]( *)/", "1. ", $s[1]) . '</ul>'; elseif( strpos($s[0], "[list=a]") === 0 ) return '<ul class="listloweralpha" style="list-style-type: lower-alpha;">' . preg_replace("/\[\*\]( *)/", "1. ", $s[1]) . '</ul>'; elseif( strpos($s[0], "[list=A]") === 0 ) return '<ul class="listupperalpha" style="list-style-type: upper-alpha;">' . preg_replace("/\[\*\]( *)/", "1. ", $s[1]) . '</ul>'; elseif( strpos($s[0], "[ol]") === 0 ) return '<ul class="listdecimal" style="list-style-type: decimal;">' . preg_replace("/\[\*\]( *)/", "1. ", $s[1]) . '</ul>'; else return $s[0]; } */ ////////////////////// // Non-Markdownify versions of "diaspora_ol" and "diaspora_ul" ////////////////////// /** * @brief * * Replace "[\\*]" followed by any number (including zero) of * spaces by "* " to match Diaspora's list format. * * @param string $s * @return string */ function diaspora_ul($s) { return preg_replace("/\[\\\\\*\]( *)/", "* ", $s[1]); } /** * @brief * * A hack: Diaspora will create a properly-numbered ordered list even * if you use '1.' for each element of the list, like: * \code * 1. First element * 1. Second element * 1. Third element * \endcode * @param string $s * @return string */ function diaspora_ol($s) { return preg_replace("/\[\\\\\*\]( *)/", "1. ", $s[1]); } function bb2dmention_callback($match) { $r = q("select xchan_addr from xchan where xchan_url = '%s'", dbesc($match[2]) ); if($r) return '@{' . $match[3] . ' ; ' . $r[0]['xchan_addr'] . '}'; return '@' . $match[3]; } function bb2diaspora_itemwallwall(&$item) { // We will provide wallwall (embedded author on the Diaspora side) if // 1. It is a wall-to-wall post // 2. A comment arrived which has no Diaspora signature info $wallwall = false; $author_exists = true; if(! array_key_exists('author',$item)) { $author_exists = false; logger('bb2diaspora_itemwallwall: no author'); $r = q("select * from xchan where xchan_hash = '%s' limit 1", dbesc($item['author_xchan']) ); if($r) $item['author'] = $r[0]; } $has_meta = false; if($item['diaspora_meta'] || get_iconfig($item,'diaspora','fields')) $has_meta = true; if($item['author_xchan'] != $item['owner_xchan']) { if($item['mid'] == $item['parent_mid']) $wallwall = true; else { if(! $has_meta) { $wallwall = true; } } } if(($wallwall) && (is_array($item['author'])) && $item['author']['xchan_url'] && $item['author']['xchan_name'] && $item['author']['xchan_photo_m']) { logger('bb2diaspora_itemwallwall: wall to wall post',LOGGER_DEBUG); // post will come across with the owner's identity. Throw a preamble onto the post to indicate the true author. $item['body'] = "\n\n" . '[img]' . $item['author']['xchan_photo_m'] . '[/img]' . '[url=' . $item['author']['xchan_url'] . ']' . $item['author']['xchan_name'] . '[/url]' . "\n\n" . $item['body']; } // $item['author'] might cause a surprise further down the line if it wasn't expected to be here. if(! $author_exists) unset($item['author']); } function bb2diaspora_itembody($item, $force_update = false, $have_channel = false) { if(! get_iconfig($item,'diaspora','fields')) { $force_update = true; } $matches = array(); if(($item['diaspora_meta']) && (! $force_update)) { $diaspora_meta = json_decode($item['diaspora_meta'],true); if($diaspora_meta) { if(array_key_exists('iv',$diaspora_meta)) { $key = get_config('system','prvkey'); $meta = json_decode(crypto_unencapsulate($diaspora_meta,$key),true); } else { $meta = $diaspora_meta; } if($meta) { logger('bb2diaspora_itembody: cached '); $newitem = $item; $newitem['body'] = $meta['body']; return $newitem['body']; } } } create_export_photo_body($item); $newitem = $item; if(array_key_exists('item_obscured',$item) && intval($item['item_obscured'])) { $key = get_config('system','prvkey'); $b = json_decode($item['body'],true); // if called from diaspora_process_outbound, this decoding has already been done. // Everything else that calls us will not yet be decoded. if($b && is_array($b) && array_key_exists('iv',$b)) { $newitem['title'] = (($item['title']) ? crypto_unencapsulate(json_decode($item['title'],true),$key) : ''); $newitem['body'] = (($item['body']) ? crypto_unencapsulate(json_decode($item['body'],true),$key) : ''); } } if(! $have_channel) bb2diaspora_itemwallwall($newitem); $title = $newitem['title']; $body = preg_replace('/\#\^http/i', 'http', $newitem['body']); // protect tags and mentions from hijacking if(intval(get_pconfig($item['uid'],'system','prevent_tag_hijacking'))) { $new_tag = html_entity_decode('⋕',ENT_COMPAT,'UTF-8'); $new_mention = html_entity_decode('@',ENT_COMPAT,'UTF-8'); // #-tags $body = preg_replace('/\#\[url/i', $new_tag . '[url', $body); $body = preg_replace('/\#\[zrl/i', $new_tag . '[zrl', $body); // @-mentions $body = preg_replace('/\@\!?\[url/i', $new_mention . '[url', $body); $body = preg_replace('/\@\!?\[zrl/i', $new_mention . '[zrl', $body); } // remove multiple newlines do { $oldbody = $body; $body = str_replace("\n\n\n", "\n\n", $body); } while ($oldbody != $body); $body = bb2diaspora($body); if(strlen($title)) $body = "## " . $title . "\n\n" . $body; if($item['attach']) { $cnt = preg_match_all('/href=\"(.*?)\"(.*?)title=\"(.*?)\"/ism', $item['attach'], $matches, PREG_SET_ORDER); if($cnt) { $body .= "\n" . t('Attachments:') . "\n"; foreach($matches as $mtch) { $body .= '[' . $mtch[3] . '](' . $mtch[1] . ')' . "\n"; } } } // logger('bb2diaspora_itembody : ' . $body, LOGGER_DATA); return html_entity_decode($body); } function bb2diaspora($Text,$preserve_nl = false, $fordiaspora = true) { // Re-enabling the converter again. // The bbcode parser now handles youtube-links (and the other stuff) correctly. // Additionally the html code is now fixed so that lists are now working. /* * Transform #tags, strip off the [url] and replace spaces with underscore */ $Text = preg_replace_callback('/#\[([zu])rl\=(\w+.*?)\](\w+.*?)\[\/[(zu)]rl\]/i', create_function('$match', 'return \'#\'. str_replace(\' \', \'_\', $match[3]);' ), $Text); $Text = preg_replace('/#\^\[([zu])rl\=(\w+.*?)\](\w+.*?)\[\/([zu])rl\]/i', '[$1rl=$2]$3[/$4rl]', $Text); $Text = preg_replace_callback('/\@\!?\[([zu])rl\=(\w+.*?)\](\w+.*?)\[\/([zu])rl\]/i', 'bb2dmention_callback', $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]', $Text); // the following was added on 10-January-2012 due to an inability of Diaspora's // new javascript markdown processor to handle links with images as the link "text" // It is not optimal and may be removed if this ability is restored in the future //if ($fordiaspora) // $Text = preg_replace("/\[url\=([^\[\]]*)\]\s*\[img\](.*?)\[\/img\]\s*\[\/url\]/ism", // "[url]$1[/url]\n[img]$2[/img]", $Text); // Convert it to HTML - don't try oembed $Text = bbcode($Text, $preserve_nl, false); // Markdownify does not preserve previously escaped html entities such as <> and &. $Text = str_replace(array('<','>','&'),array('&_lt_;','&_gt_;','&_amp_;'),$Text); // Now convert HTML to Markdown $md = new Markdownify(false, false, false); $Text = $md->parseString($Text); // It also adds backslashes to our attempt at getting around the html entity preservation for some weird reason. $Text = str_replace(array('&\\_lt\\_;','&\\_gt\\_;','&\\_amp\\_;'),array('<','>','&'),$Text); // If the text going into bbcode() has a plain URL in it, i.e. // with no [url] tags around it, it will come out of parseString() // looking like: <http://url.com>, which gets removed by strip_tags(). // So take off the angle brackets of any such URL $Text = preg_replace("/<http(.*?)>/is", "http$1", $Text); // Remove empty zrl links $Text = preg_replace("/\[zrl\=\].*?\[\/zrl\]/is", "", $Text); // Remove all unconverted tags $Text = strip_tags($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 $o = t('$Projectname event notification:') . "\n"; $o .= '**' . (($ev['summary']) ? bb2diaspora($ev['summary']) : bb2diaspora($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'] , $bd_format))) . '](' . z_root() . '/localtime/?f=&time=' . urlencode(datetime_convert('UTC','UTC',$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'] , $bd_format ))) . '](' . z_root() . '/localtime/?f=&time=' . urlencode(datetime_convert('UTC','UTC',$ev['finish'])) . ")\n"; if(strlen($ev['location'])) $o .= t('Location:') . bb2diaspora($ev['location']) . "\n"; $o .= "\n"; return $o; }