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https://codeberg.org/streams/streams.git
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6c79e0c077
The current version 2.0.0 (alpha) throws deprecated warning with PHP7.1 and PHPUnit. Upgrade the HTML to Markdown converter for PHP to the current Markdownify 2.2.1. Used composer to manage this library.
566 lines
17 KiB
PHP
566 lines
17 KiB
PHP
<?php
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/**
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* @file include/markdown.php
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* @brief Some functions for BB conversions for Diaspora protocol.
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*/
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use Michelf\MarkdownExtra;
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use Markdownify\Converter;
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require_once("include/oembed.php");
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require_once("include/event.php");
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require_once("include/html2bbcode.php");
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require_once("include/bbcode.php");
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function get_bb_tag_pos($s, $name, $occurance = 1) {
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if($occurance < 1)
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$occurance = 1;
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$start_open = -1;
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for($i = 1; $i <= $occurance; $i++) {
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if( $start_open !== false)
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$start_open = strpos($s, '[' . $name, $start_open + 1); // allow [name= type tags
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}
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if( $start_open === false)
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return false;
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$start_equal = strpos($s, '=', $start_open);
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$start_close = strpos($s, ']', $start_open);
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if( $start_close === false)
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return false;
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$start_close++;
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$end_open = strpos($s, '[/' . $name . ']', $start_close);
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if( $end_open === false)
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return false;
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$res = array( 'start' => array('open' => $start_open, 'close' => $start_close),
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'end' => array('open' => $end_open, 'close' => $end_open + strlen('[/' . $name . ']')) );
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if( $start_equal !== false)
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$res['start']['equal'] = $start_equal + 1;
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return $res;
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}
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function bb_tag_preg_replace($pattern, $replace, $name, $s) {
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$string = $s;
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$occurance = 1;
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$pos = get_bb_tag_pos($string, $name, $occurance);
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while($pos !== false && $occurance < 1000) {
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$start = substr($string, 0, $pos['start']['open']);
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$subject = substr($string, $pos['start']['open'], $pos['end']['close'] - $pos['start']['open']);
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$end = substr($string, $pos['end']['close']);
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if($end === false)
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$end = '';
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$subject = preg_replace($pattern, $replace, $subject);
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$string = $start . $subject . $end;
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$occurance++;
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$pos = get_bb_tag_pos($string, $name, $occurance);
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}
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return $string;
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}
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function share_shield($m) {
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return str_replace($m[1],'!=+=+=!' . base64url_encode($m[1]) . '=+!=+!=',$m[0]);
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}
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function share_unshield($m) {
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$x = str_replace(array('!=+=+=!','=+!=+!='),array('',''),$m[1]);
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return str_replace($m[1], base64url_decode($x), $m[0]);
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}
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function diaspora_mention_callback($matches) {
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$webbie = $matches[2] . '@' . $matches[3];
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$link = '';
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if($webbie) {
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$r = q("select * from hubloc left join xchan on hubloc_hash = xchan_hash where hubloc_addr = '%s' limit 1",
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dbesc($webbie)
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);
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if(! $r) {
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$x = discover_by_webbie($webbie);
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if($x) {
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$r = q("select * from hubloc left join xchan on hubloc_hash = xchan_hash where hubloc_addr = '%s' limit 1",
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dbesc($webbie)
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);
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}
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}
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if($r)
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$link = $r[0]['xchan_url'];
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}
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if(! $link)
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$link = 'https://' . $matches[3] . '/u/' . $matches[2];
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if($r && $r[0]['hubloc_network'] === 'zot')
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return '@[zrl=' . $link . ']' . trim($matches[1]) . ((substr($matches[0],-1,1) === '+') ? '+' : '') . '[/zrl]' ;
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else
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return '@[url=' . $link . ']' . trim($matches[1]) . ((substr($matches[0],-1,1) === '+') ? '+' : '') . '[/url]' ;
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}
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function diaspora_mention_callback2($matches) {
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$webbie = $matches[1] . '@' . $matches[2];
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$link = '';
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if($webbie) {
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$r = q("select * from hubloc left join xchan on hubloc_hash = xchan_hash where hubloc_addr = '%s' limit 1",
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dbesc($webbie)
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);
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if(! $r) {
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$x = discover_by_webbie($webbie);
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if($x) {
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$r = q("select * from hubloc left join xchan on hubloc_hash = xchan_hash where hubloc_addr = '%s' limit 1",
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dbesc($webbie)
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);
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}
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}
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if($r)
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$link = $r[0]['xchan_url'];
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}
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$name = (($r) ? $r[0]['xchan_name'] : $matches[1]);
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if(! $link)
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$link = 'https://' . $matches[2] . '/u/' . $matches[1];
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if($r && $r[0]['hubloc_network'] === 'zot')
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return '@[zrl=' . $link . ']' . trim($name) . ((substr($matches[0],-1,1) === '+') ? '+' : '') . '[/zrl]' ;
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else
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return '@[url=' . $link . ']' . trim($name) . ((substr($matches[0],-1,1) === '+') ? '+' : '') . '[/url]' ;
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}
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/**
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* @brief
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*
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* We don't want to support a bbcode specific markdown interpreter
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* and the markdown library we have is pretty good, but provides HTML output.
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* So we'll use that to convert to HTML, then convert the HTML back to bbcode,
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* and then clean up a few Diaspora specific constructs.
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*
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* @param string $s
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* @param boolean $use_zrl default false
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* @return string
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*/
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function markdown_to_bb($s, $use_zrl = false) {
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$s = str_replace("
","\r",$s);
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$s = str_replace("
\n>","",$s);
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if(is_array($s)) {
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btlogger('markdown_to_bb called with array. ' . print_r($s,true), LOGGER_NORMAL, LOG_WARNING);
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return '';
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}
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$s = html_entity_decode($s,ENT_COMPAT,'UTF-8');
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// if empty link text replace with the url
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$s = preg_replace("/\[\]\((.*?)\)/ism",'[$1]($1)',$s);
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// first try plustags
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$s = preg_replace_callback('/\@\{(.+?)\; (.+?)\@(.+?)\}\+/','diaspora_mention_callback',$s);
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$s = preg_replace_callback('/\@\{(.+?)\; (.+?)\@(.+?)\}/','diaspora_mention_callback',$s);
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$s = preg_replace_callback('/\@\{(.+?)\@(.+?)\}\+/','diaspora_mention_callback2',$s);
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$s = preg_replace_callback('/\@\{(.+?)\@(.+?)\}/','diaspora_mention_callback2',$s);
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// Escaping the hash tags - doesn't always seem to work
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// $s = preg_replace('/\#([^\s\#])/','\\#$1',$s);
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// This seems to work
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$s = preg_replace('/\#([^\s\#])/','#$1',$s);
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$s = MarkdownExtra::defaultTransform($s);
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$s = str_replace("\r","",$s);
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$s = str_replace('#','#',$s);
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$s = html2bbcode($s);
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// protect the recycle symbol from turning into a tag, but without unescaping angles and naked ampersands
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$s = str_replace('♲',html_entity_decode('♲',ENT_QUOTES,'UTF-8'),$s);
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// Convert everything that looks like a link to a link
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if($use_zrl) {
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$s = str_replace(array('[img','/img]'),array('[zmg','/zmg]'),$s);
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$s = preg_replace("/([^\]\=]|^)(https?\:\/\/)([a-zA-Z0-9\:\/\-\?\&\;\.\=\_\~\#\%\$\!\+\,\(\)]+)/ism", '$1[zrl=$2$3]$2$3[/zrl]',$s);
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}
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else {
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$s = preg_replace("/([^\]\=]|^)(https?\:\/\/)([a-zA-Z0-9\:\/\-\?\&\;\.\=\_\~\#\%\$\!\+\,\(\)]+)/ism", '$1[url=$2$3]$2$3[/url]',$s);
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}
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// remove duplicate adjacent code tags
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$s = preg_replace("/(\[code\])+(.*?)(\[\/code\])+/ism","[code]$2[/code]", $s);
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// Don't show link to full picture (until it is fixed)
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$s = scale_external_images($s, false);
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call_hooks('markdown_to_bb',$s);
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return $s;
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}
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function stripdcode_br_cb($s) {
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return '[code]' . str_replace('<br />', "\n\t", $s[1]) . '[/code]';
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}
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//////////////////////
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// The following "diaspora_ul" and "diaspora_ol" are only appropriate for the
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// pre-Markdownify conversion. If Markdownify isn't used, use the non-Markdownify
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// versions below
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//////////////////////
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/*
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function diaspora_ul($s) {
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// Replace "[*]" followed by any number (including zero) of
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// spaces by "* " to match Diaspora's list format
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if( strpos($s[0], "[list]") === 0 )
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return '<ul class="listbullet" style="list-style-type: circle;">' . preg_replace("/\[\*\]( *)/", "* ", $s[1]) . '</ul>';
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elseif( strpos($s[0], "[ul]") === 0 )
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return '<ul class="listbullet" style="list-style-type: circle;">' . preg_replace("/\[\*\]( *)/", "* ", $s[1]) . '</ul>';
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else
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return $s[0];
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}
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function diaspora_ol($s) {
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// A hack: Diaspora will create a properly-numbered ordered list even
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// if you use '1.' for each element of the list, like:
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// 1. First element
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// 1. Second element
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// 1. Third element
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if( strpos($s[0], "[list=1]") === 0 )
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return '<ul class="listdecimal" style="list-style-type: decimal;">' . preg_replace("/\[\*\]( *)/", "1. ", $s[1]) . '</ul>';
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elseif( strpos($s[0], "[list=i]") === 0 )
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return '<ul class="listlowerroman" style="list-style-type: lower-roman;">' . preg_replace("/\[\*\]( *)/", "1. ", $s[1]) . '</ul>';
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elseif( strpos($s[0], "[list=I]") === 0 )
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return '<ul class="listupperroman" style="list-style-type: upper-roman;">' . preg_replace("/\[\*\]( *)/", "1. ", $s[1]) . '</ul>';
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elseif( strpos($s[0], "[list=a]") === 0 )
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return '<ul class="listloweralpha" style="list-style-type: lower-alpha;">' . preg_replace("/\[\*\]( *)/", "1. ", $s[1]) . '</ul>';
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elseif( strpos($s[0], "[list=A]") === 0 )
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return '<ul class="listupperalpha" style="list-style-type: upper-alpha;">' . preg_replace("/\[\*\]( *)/", "1. ", $s[1]) . '</ul>';
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elseif( strpos($s[0], "[ol]") === 0 )
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return '<ul class="listdecimal" style="list-style-type: decimal;">' . preg_replace("/\[\*\]( *)/", "1. ", $s[1]) . '</ul>';
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else
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return $s[0];
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}
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*/
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//////////////////////
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// Non-Markdownify versions of "diaspora_ol" and "diaspora_ul"
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//////////////////////
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/**
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* @brief
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*
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* Replace "[\\*]" followed by any number (including zero) of
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* spaces by "* " to match Diaspora's list format.
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*
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* @param string $s
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* @return string
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*/
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function diaspora_ul($s) {
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return preg_replace("/\[\\\\\*\]( *)/", "* ", $s[1]);
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}
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/**
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* @brief
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*
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* A hack: Diaspora will create a properly-numbered ordered list even
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* if you use '1.' for each element of the list, like:
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* \code
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* 1. First element
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* 1. Second element
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* 1. Third element
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* \endcode
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* @param string $s
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* @return string
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*/
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function diaspora_ol($s) {
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return preg_replace("/\[\\\\\*\]( *)/", "1. ", $s[1]);
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}
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function bb2dmention_callback($match) {
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$r = q("select xchan_addr from xchan where xchan_url = '%s'",
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dbesc($match[2])
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);
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if($r)
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return '@{' . $match[3] . ' ; ' . $r[0]['xchan_addr'] . '}';
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return '@' . $match[3];
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}
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function bb2diaspora_itemwallwall(&$item,$uplink = false) {
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// We will provide wallwall (embedded author on the Diaspora side) if
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// 1. It is a wall-to-wall post
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// 2. A comment arrived which has no Diaspora signature info
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$wallwall = false;
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$author_exists = true;
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if(! array_key_exists('author',$item)) {
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$author_exists = false;
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logger('bb2diaspora_itemwallwall: no author');
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$r = q("select * from xchan where xchan_hash = '%s' limit 1",
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dbesc($item['author_xchan'])
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);
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if($r)
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$item['author'] = $r[0];
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}
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$has_meta = false;
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if($item['diaspora_meta'] || get_iconfig($item,'diaspora','fields'))
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$has_meta = true;
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if($item['author_xchan'] != $item['owner_xchan']) {
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if($item['mid'] == $item['parent_mid'])
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$wallwall = true;
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else {
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if(! $has_meta) {
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$wallwall = true;
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}
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}
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}
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if($uplink)
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$wallwall = true;
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if(($wallwall) && (is_array($item['author'])) && $item['author']['xchan_url'] && $item['author']['xchan_name'] && $item['author']['xchan_photo_s']) {
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logger('bb2diaspora_itemwallwall: wall to wall post',LOGGER_DEBUG);
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// post will come across with the owner's identity. Throw a preamble onto the post to indicate the true author.
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$item['body'] = "\n\n"
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. '[quote]'
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. '[img]' . $item['author']['xchan_photo_s'] . '[/img]'
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. ' '
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. '[url=' . $item['author']['xchan_url'] . '][b]' . $item['author']['xchan_name'] . '[/b][/url]' . "\n\n"
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. $item['body']
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. '[/quote]';
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}
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// $item['author'] might cause a surprise further down the line if it wasn't expected to be here.
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if(! $author_exists)
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unset($item['author']);
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}
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function bb2diaspora_itembody($item, $force_update = false, $have_channel = false, $uplink = false) {
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if(! get_iconfig($item,'diaspora','fields')) {
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$force_update = true;
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}
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$matches = array();
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if(($item['diaspora_meta']) && (! $force_update)) {
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$diaspora_meta = json_decode($item['diaspora_meta'],true);
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if($diaspora_meta) {
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if(array_key_exists('iv',$diaspora_meta)) {
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$key = get_config('system','prvkey');
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$meta = json_decode(crypto_unencapsulate($diaspora_meta,$key),true);
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}
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else {
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$meta = $diaspora_meta;
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}
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if($meta) {
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logger('bb2diaspora_itembody: cached ');
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$newitem = $item;
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$newitem['body'] = $meta['body'];
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return $newitem['body'];
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}
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}
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}
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create_export_photo_body($item);
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$newitem = $item;
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if(array_key_exists('item_obscured',$item) && intval($item['item_obscured'])) {
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$key = get_config('system','prvkey');
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$b = json_decode($item['body'],true);
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// if called from diaspora_process_outbound, this decoding has already been done.
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// Everything else that calls us will not yet be decoded.
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if($b && is_array($b) && array_key_exists('iv',$b)) {
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$newitem['title'] = (($item['title']) ? crypto_unencapsulate(json_decode($item['title'],true),$key) : '');
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$newitem['body'] = (($item['body']) ? crypto_unencapsulate(json_decode($item['body'],true),$key) : '');
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}
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}
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if(! $have_channel)
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bb2diaspora_itemwallwall($newitem,$uplink);
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$title = $newitem['title'];
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$body = preg_replace('/\#\^http/i', 'http', $newitem['body']);
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// protect tags and mentions from hijacking
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if(intval(get_pconfig($item['uid'],'system','prevent_tag_hijacking'))) {
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$new_tag = html_entity_decode('⋕',ENT_COMPAT,'UTF-8');
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$new_mention = html_entity_decode('＠',ENT_COMPAT,'UTF-8');
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// #-tags
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$body = preg_replace('/\#\[url/i', $new_tag . '[url', $body);
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$body = preg_replace('/\#\[zrl/i', $new_tag . '[zrl', $body);
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// @-mentions
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$body = preg_replace('/\@\!?\[url/i', $new_mention . '[url', $body);
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$body = preg_replace('/\@\!?\[zrl/i', $new_mention . '[zrl', $body);
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}
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// remove multiple newlines
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do {
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$oldbody = $body;
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$body = str_replace("\n\n\n", "\n\n", $body);
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} while ($oldbody != $body);
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$body = bb2diaspora($body);
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if(strlen($title))
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$body = "## " . $title . "\n\n" . $body;
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if($item['attach']) {
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$cnt = preg_match_all('/href=\"(.*?)\"(.*?)title=\"(.*?)\"/ism', $item['attach'], $matches, PREG_SET_ORDER);
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if($cnt) {
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$body .= "\n" . t('Attachments:') . "\n";
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foreach($matches as $mtch) {
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$body .= '[' . $mtch[3] . '](' . $mtch[1] . ')' . "\n";
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}
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}
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}
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// logger('bb2diaspora_itembody : ' . $body, LOGGER_DATA);
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return html_entity_decode($body);
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}
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function bb2diaspora($Text, $preserve_nl = false, $fordiaspora = true) {
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// Re-enabling the converter again.
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// The bbcode parser now handles youtube-links (and the other stuff) correctly.
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// Additionally the html code is now fixed so that lists are now working.
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/*
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* Transform #tags, strip off the [url] and replace spaces with underscore
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*/
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$Text = preg_replace_callback('/#\[([zu])rl\=(\w+.*?)\](\w+.*?)\[\/[(zu)]rl\]/i', create_function('$match',
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'return \'#\'. str_replace(\' \', \'_\', $match[3]);'
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), $Text);
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$Text = preg_replace('/#\^\[([zu])rl\=(\w+.*?)\](\w+.*?)\[\/([zu])rl\]/i', '[$1rl=$2]$3[/$4rl]', $Text);
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$Text = preg_replace_callback('/\@\!?\[([zu])rl\=(\w+.*?)\](\w+.*?)\[\/([zu])rl\]/i', 'bb2dmention_callback', $Text);
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// strip map tags, as the rendering is performed in bbcode() and the resulting output
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// is not compatible with Diaspora (at least in the case of openstreetmap and probably
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// due to the inclusion of an html iframe)
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$Text = preg_replace("/\[map\=(.*?)\]/ism", '$1', $Text);
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$Text = preg_replace("/\[map\](.*?)\[\/map\]/ism", '$1', $Text);
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// Converting images with size parameters to simple images. Markdown doesn't know it.
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$Text = preg_replace("/\[img\=([0-9]*)x([0-9]*)\](.*?)\[\/img\]/ism", '[img]$3[/img]', $Text);
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// the following was added on 10-January-2012 due to an inability of Diaspora's
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// new javascript markdown processor to handle links with images as the link "text"
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// It is not optimal and may be removed if this ability is restored in the future
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//if ($fordiaspora)
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// $Text = preg_replace("/\[url\=([^\[\]]*)\]\s*\[img\](.*?)\[\/img\]\s*\[\/url\]/ism",
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// "[url]$1[/url]\n[img]$2[/img]", $Text);
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// Convert it to HTML - don't try oembed
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$Text = bbcode($Text, $preserve_nl, false);
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// Markdownify does not preserve previously escaped html entities such as <> and &.
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$Text = str_replace(array('<','>','&'),array('&_lt_;','&_gt_;','&_amp_;'),$Text);
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// Now convert HTML to Markdown
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$md = new Converter(Converter::LINK_AFTER_CONTENT, false, false);
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$Text = $md->parseString($Text);
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// It also adds backslashes to our attempt at getting around the html entity preservation for some weird reason.
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$Text = str_replace(array('&\\_lt\\_;','&\\_gt\\_;','&\\_amp\\_;'),array('<','>','&'),$Text);
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// If the text going into bbcode() has a plain URL in it, i.e.
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// with no [url] tags around it, it will come out of parseString()
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// looking like: <http://url.com>, which gets removed by strip_tags().
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// So take off the angle brackets of any such URL
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$Text = preg_replace("/<http(.*?)>/is", "http$1", $Text);
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// Remove empty zrl links
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$Text = preg_replace("/\[zrl\=\].*?\[\/zrl\]/is", "", $Text);
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// Remove all unconverted tags
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$Text = strip_tags($Text);
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// Remove any leading or trailing whitespace, as this will mess up
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// the Diaspora signature verification and cause the item to disappear
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$Text = trim($Text);
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call_hooks('bb2diaspora', $Text);
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return $Text;
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}
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function unescape_underscores_in_links($m) {
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$y = str_replace('\\_','_', $m[2]);
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return('[' . $m[1] . '](' . $y . ')');
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}
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function format_event_diaspora($ev) {
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if(! ((is_array($ev)) && count($ev)))
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return '';
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$bd_format = t('l F d, Y \@ g:i A') ; // Friday January 18, 2011 @ 8 AM
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$o = t('$Projectname event notification:') . "\n";
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$o .= '**' . (($ev['summary']) ? bb2diaspora($ev['summary']) : bb2diaspora($ev['desc'])) . '**' . "\n";
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$o .= t('Starts:') . ' ' . '['
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. (($ev['adjust']) ? day_translate(datetime_convert('UTC', 'UTC',
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$ev['start'] , $bd_format ))
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: day_translate(datetime_convert('UTC', 'UTC',
|
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$ev['start'] , $bd_format)))
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. '](' . z_root() . '/localtime/?f=&time=' . urlencode(datetime_convert('UTC','UTC',$ev['start'])) . ")\n";
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if(! $ev['nofinish'])
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$o .= t('Finishes:') . ' ' . '['
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. (($ev['adjust']) ? day_translate(datetime_convert('UTC', 'UTC',
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$ev['finish'] , $bd_format ))
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: day_translate(datetime_convert('UTC', 'UTC',
|
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$ev['finish'] , $bd_format )))
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. '](' . z_root() . '/localtime/?f=&time=' . urlencode(datetime_convert('UTC','UTC',$ev['finish'])) . ")\n";
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if(strlen($ev['location']))
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$o .= t('Location:') . bb2diaspora($ev['location'])
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. "\n";
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$o .= "\n";
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return $o;
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}
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