mirror of
https://github.com/friendica/friendica
synced 2024-12-23 22:40:17 +00:00
382 lines
16 KiB
PHP
382 lines
16 KiB
PHP
<?php
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require_once("include/oembed.php");
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require_once("include/event.php");
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require_once("library/markdown.php");
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require_once("include/html2bbcode.php");
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require_once("include/bbcode.php");
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require_once("include/markdownify/markdownify.php");
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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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function diaspora2bb($s) {
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// for testing purposes: Collect raw markdown articles
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// $file = tempnam("/tmp/friendica/", "markdown");
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// file_put_contents($file, $s);
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$s = html_entity_decode($s,ENT_COMPAT,'UTF-8');
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// Too many new lines. So deactivated the following line
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// $s = str_replace("\r","\n",$s);
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// Simply remove cr.
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$s = str_replace("\r","",$s);
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// <br/> is invalid. Replace it with the valid expression
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$s = str_replace("<br/>","<br />",$s);
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$s = preg_replace('/\@\{(.+?)\; (.+?)\@(.+?)\}/','@[url=https://$3/u/$2]$1[/url]',$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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$s = Markdown($s);
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$s = str_replace('#','#',$s);
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// we seem to have double linebreaks
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// $s = str_replace("\n",'<br />',$s);
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$s = html2bbcode($s);
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// $s = str_replace('*','*',$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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$s = str_replace('♲',html_entities_decode('♲',ENT_QUOTES,'UTF-8'),$s);
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// Convert everything that looks like a link to a link
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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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//$s = preg_replace("/([^\]\=]|^)(https?\:\/\/)(vimeo|youtu|www\.youtube|soundcloud)([a-zA-Z0-9\:\/\-\?\&\;\.\=\_\~\#\%\$\!\+\,]+)/ism", '$1[url=$2$3$4]$2$3$4[/url]',$s);
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$s = preg_replace("/\[url\=?(.*?)\]https?:\/\/www.youtube.com\/watch\?v\=(.*?)\[\/url\]/ism",'[youtube]$2[/youtube]',$s);
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$s = preg_replace("/\[url\=https?:\/\/www.youtube.com\/watch\?v\=(.*?)\].*?\[\/url\]/ism",'[youtube]$1[/youtube]',$s);
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$s = preg_replace("/\[url\=?(.*?)\]https?:\/\/vimeo.com\/([0-9]+)(.*?)\[\/url\]/ism",'[vimeo]$2[/vimeo]',$s);
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$s = preg_replace("/\[url\=https?:\/\/vimeo.com\/([0-9]+)\](.*?)\[\/url\]/ism",'[vimeo]$1[/vimeo]',$s);
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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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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", $s[1]) . '[/code]';
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}
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function diaspora_ul($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 $s[0];
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}
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function bb2diaspora($Text,$preserve_nl = false) {
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// bbcode() will convert "[*]" into "<li>" with no closing "</li>"
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// Markdownify() is unable to handle these, as it makes each new
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// "<li>" into a deeper nested element until it crashes. So pre-format
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// the lists as Diaspora lists before sending the $Text to bbcode()
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//
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// Note that to get nested lists to work for Diaspora, we would need
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// to define the closing tag for the list elements. So nested lists
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// are going to be flattened out in Diaspora for now
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$endlessloop = 0;
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while ((((strpos($Text, "[/list]") !== false) && (strpos($Text, "[list") !== false)) ||
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((strpos($Text, "[/ol]") !== false) && (strpos($Text, "[ol]") !== false)) ||
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((strpos($Text, "[/ul]") !== false) && (strpos($Text, "[ul]") !== false))) && (++$endlessloop < 20)) {
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$Text = preg_replace_callback("/\[list\](.*?)\[\/list\]/is", 'diaspora_ul', $Text);
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$Text = preg_replace_callback("/\[list=1\](.*?)\[\/list\]/is", 'diaspora_ol', $Text);
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$Text = preg_replace_callback("/\[list=i\](.*?)\[\/list\]/s",'diaspora_ol', $Text);
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$Text = preg_replace_callback("/\[list=I\](.*?)\[\/list\]/s", 'diaspora_ol', $Text);
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$Text = preg_replace_callback("/\[list=a\](.*?)\[\/list\]/s", 'diaspora_ol', $Text);
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$Text = preg_replace_callback("/\[list=A\](.*?)\[\/list\]/s", 'diaspora_ol', $Text);
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$Text = preg_replace_callback("/\[ul\](.*?)\[\/ul\]/is", 'diaspora_ul', $Text);
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$Text = preg_replace_callback("/\[ol\](.*?)\[\/ol\]/is", 'diaspora_ol', $Text);
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}
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//////////////////////
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// An attempt was made to convert bbcode to html and then to markdown
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// consisting of the following lines.
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// I'm undoing this as we have a lot of bbcode constructs which
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// were simply getting lost, for instance bookmark, vimeo, video, youtube, events, etc.
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// We can try this again, but need a very good test sequence to verify
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// all the major bbcode constructs that we use are getting through.
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//////////////////////
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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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// Now convert HTML to Markdown
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// $md = new Markdownify(false, false, false);
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// $Text = $md->parseString($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 all unconverted tags
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// $Text = strip_tags($Text);
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//////
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// end of bb->html->md conversion attempt
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//////
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$ev = bbtoevent($Text);
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// Replace any html brackets with HTML Entities to prevent executing HTML or script
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// Don't use strip_tags here because it breaks [url] search by replacing & with amp
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$Text = str_replace("<", "<", $Text);
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$Text = str_replace(">", ">", $Text);
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// If we find any event code, turn it into an event.
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// After we're finished processing the bbcode we'll
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// replace all of the event code with a reformatted version.
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if($preserve_nl)
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$Text = str_replace(array("\n","\r"), array('',''),$Text);
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else
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// Remove the "return" character, as Diaspora uses only the "newline"
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// character, so having the "return" character can cause signature
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// failures
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$Text = str_replace("\r", "", $Text);
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// Set up the parameters for a URL search string
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$URLSearchString = "^\[\]";
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// Set up the parameters for a MAIL search string
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$MAILSearchString = $URLSearchString;
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// Perform URL Search
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// [img]pathtoimage[/img]
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// the following was added on 10-January-2012 due to an inability of Diaspora's
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// new javascript markdown processor to handle links with images as the link "text"
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// It is not optimal and may be removed if this ability is restored in the future
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$Text = preg_replace("/\[url\=([$URLSearchString]*)\]\[img\](.*?)\[\/img\]\[\/url\]/ism",
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'' . "\n" . '[' . t('link') . '](' . '$1' . ')', $Text);
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$Text = preg_replace("/\[bookmark\]([$URLSearchString]*)\[\/bookmark\]/ism", '[$1]($1)', $Text);
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$Text = preg_replace("/\[bookmark\=([$URLSearchString]*)\](.*?)\[\/bookmark\]/ism", '[$2]($1)', $Text);
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$Text = preg_replace("/\[url\]([$URLSearchString]*)\[\/url\]/ism", '[$1]($1)', $Text);
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$Text = preg_replace("/\#\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism", '[#$2]($1)', $Text);
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$Text = preg_replace("/\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism", '[$2]($1)', $Text);
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$Text = preg_replace("/\[img\](.*?)\[\/img\]/", '', $Text);
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$Text = preg_replace("/\[img\=(.*?)\](.*?)\[\/img\]/", '', $Text);
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// Perform MAIL Search
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$Text = preg_replace("(\[mail\]([$MAILSearchString]*)\[/mail\])", '[$1](mailto:$1)', $Text);
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$Text = preg_replace("/\[mail\=([$MAILSearchString]*)\](.*?)\[\/mail\]/", '[$2](mailto:$1)', $Text);
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$Text = str_replace('*', '\\*', $Text);
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$Text = str_replace('_', '\\_', $Text);
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$Text = str_replace('`','\\`', $Text);
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// Check for bold text
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$Text = preg_replace("(\[b\](.*?)\[\/b\])is",'**$1**',$Text);
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// Check for italics text
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$Text = preg_replace("(\[i\](.*?)\[\/i\])is",'_$1_',$Text);
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// Check for underline text
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// Replace with italics since Diaspora doesn't have underline
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$Text = preg_replace("(\[u\](.*?)\[\/u\])is",'_$1_',$Text);
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// Check for strike-through text
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$Text = preg_replace("(\[s\](.*?)\[\/s\])is",'**[strike]**$1**[/strike]**',$Text);
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// Check for over-line text
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// $Text = preg_replace("(\[o\](.*?)\[\/o\])is",'<span class="overline">$1</span>',$Text);
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// Check for colored text
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// Remove color since Diaspora doesn't support it
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$Text = preg_replace("(\[color=(.*?)\](.*?)\[\/color\])is","$2",$Text);
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// Check for sized text
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// Remove it since Diaspora doesn't support sizes very well
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$Text = preg_replace("(\[size=(.*?)\](.*?)\[\/size\])is","$2",$Text);
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// Check for list text
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$Text = preg_replace_callback("/\[list\](.*?)\[\/list\]/is", 'diaspora_ul', $Text);
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$Text = preg_replace_callback("/\[ul\](.*?)\[\/ul\]/is", 'diaspora_ul', $Text);
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$Text = preg_replace_callback("/\[list=1\](.*?)\[\/list\]/is", 'diaspora_ol', $Text);
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$Text = preg_replace_callback("/\[list=i\](.*?)\[\/list\]/s",'diaspora_ol', $Text);
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$Text = preg_replace_callback("/\[list=I\](.*?)\[\/list\]/s", 'diaspora_ol', $Text);
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$Text = preg_replace_callback("/\[list=a\](.*?)\[\/list\]/s", 'diaspora_ol', $Text);
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$Text = preg_replace_callback("/\[list=A\](.*?)\[\/list\]/s", 'diaspora_ol', $Text);
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$Text = preg_replace_callback("/\[ol\](.*?)\[\/ol\]/is", 'diaspora_ol', $Text);
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// $Text = preg_replace("/\[li\](.*?)\[\/li\]/s", '<li>$1</li>' ,$Text);
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// Just get rid of table tags since Diaspora doesn't support tables
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$Text = preg_replace("/\[th\](.*?)\[\/th\]/s", '$1' ,$Text);
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$Text = preg_replace("/\[td\](.*?)\[\/td\]/s", '$1' ,$Text);
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$Text = preg_replace("/\[tr\](.*?)\[\/tr\]/s", '$1' ,$Text);
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$Text = preg_replace("/\[table\](.*?)\[\/table\]/s", '$1' ,$Text);
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$Text = preg_replace("/\[table border=(.*?)\](.*?)\[\/table\]/s", '$2' ,$Text);
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// $Text = preg_replace("/\[table border=0\](.*?)\[\/table\]/s", '<table border="0" >$1</table>' ,$Text);
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// $Text = str_replace("[*]", "<li>", $Text);
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// Check for font change text
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// $Text = preg_replace("(\[font=(.*?)\](.*?)\[\/font\])","<span style=\"font-family: $1;\">$2</span>",$Text);
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$Text = preg_replace_callback("/\[code\](.*?)\[\/code\]/is",'stripdcode_br_cb',$Text);
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// Check for [code] text
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$Text = preg_replace("/(\[code\])+(.*?)(\[\/code\])+/is","\t$2\n", $Text);
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// Declare the format for [quote] layout
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// $QuoteLayout = '<blockquote>$1</blockquote>';
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// Check for [quote] text
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$Text = preg_replace("/\[quote\](.*?)\[\/quote\]/is",">$1\n\n", $Text);
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$Text = preg_replace("/\[quote=(.*?)\](.*?)\[\/quote\]/is",">$2\n\n", $Text);
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// Images
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// html5 video and audio
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$Text = preg_replace("/\[video\](.*?)\[\/video\]/", '$1', $Text);
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$Text = preg_replace("/\[audio\](.*?)\[\/audio\]/", '$1', $Text);
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// $Text = preg_replace("/\[iframe\](.*?)\[\/iframe\]/", '<iframe src="$1" width="425" height="350"><a href="$1">$1</a></iframe>', $Text);
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// [img=widthxheight]image source[/img]
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// $Text = preg_replace("/\[img\=([0-9]*)x([0-9]*)\](.*?)\[\/img\]/", '<img src="$3" style="height:{$2}px; width:{$1}px;" >', $Text);
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$Text = preg_replace("/\[youtube\]https?:\/\/www.youtube.com\/watch\?v\=(.*?)\[\/youtube\]/ism",'http://www.youtube.com/watch?v=$1',$Text);
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$Text = preg_replace("/\[youtube\]https?:\/\/www.youtube.com\/embed\/(.*?)\[\/youtube\]/ism",'http://www.youtube.com/watch?v=$1',$Text);
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$Text = preg_replace("/\[youtube\]https?:\/\/youtu.be\/(.*?)\[\/youtube\]/ism",'http://www.youtube.com/watch?v=$1',$Text);
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$Text = preg_replace("/\[youtube\]([A-Za-z0-9\-_=]+)(.*?)\[\/youtube\]/ism", 'http://www.youtube.com/watch?v=$1', $Text);
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$Text = preg_replace("/\[vimeo\]https?:\/\/player.vimeo.com\/video\/([0-9]+)(.*?)\[\/vimeo\]/ism",'http://vimeo.com/$1',$Text);
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$Text = preg_replace("/\[vimeo\]https?:\/\/vimeo.com\/([0-9]+)(.*?)\[\/vimeo\]/ism",'http://vimeo.com/$1',$Text);
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$Text = preg_replace("/\[vimeo\]([0-9]+)(.*?)\[\/vimeo\]/ism", 'http://vimeo.com/$1',$Text);
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$Text = str_replace('[nosmile]','',$Text);
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// oembed tag
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// $Text = oembed_bbcode2html($Text);
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// If we found an event earlier, strip out all the event code and replace with a reformatted version.
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if(x($ev,'desc') && x($ev,'start')) {
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$sub = format_event_diaspora($ev);
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$Text = preg_replace("/\[event\-summary\](.*?)\[\/event\-summary\]/is",'',$Text);
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$Text = preg_replace("/\[event\-description\](.*?)\[\/event\-description\]/is",'',$Text);
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$Text = preg_replace("/\[event\-start\](.*?)\[\/event\-start\]/is",$sub,$Text);
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$Text = preg_replace("/\[event\-finish\](.*?)\[\/event\-finish\]/is",'',$Text);
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$Text = preg_replace("/\[event\-location\](.*?)\[\/event\-location\]/is",'',$Text);
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$Text = preg_replace("/\[event\-adjust\](.*?)\[\/event\-adjust\]/is",'',$Text);
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}
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$Text = preg_replace("/\<(.*?)(src|href)=(.*?)\&\;(.*?)\>/ism",'<$1$2=$3&$4>',$Text);
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$Text = preg_replace_callback('/\[(.*?)\]\((.*?)\)/ism','unescape_underscores_in_links',$Text);
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// Remove any leading or trailing whitespace, as this will mess up
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// the Diaspora signature verification and cause the item to disappear
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$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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$a = get_app();
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if(! ((is_array($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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$o = 'Friendica event notification:' . "\n";
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$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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. '](' . $a->get_baseurl() . '/localtime/?f=&time=' . urlencode(datetime_convert('UTC','UTC',$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',
|
|
$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;
|
|
}
|