- <?php
-
- use Friendica\App;
-
- use League\HTMLToMarkdown\HtmlConverter;
-
- 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";
-
- /**
- * @brief Callback function to replace a Diaspora style mention in a mention for Friendica
- *
- * @param array $match Matching values for the callback
- * @return string Replaced mention
- */
- function diaspora_mention2bb($match) {
- if ($match[2] == '') {
- return;
- }
-
- $data = get_contact_details_by_addr($match[2]);
-
- $name = $match[1];
-
- if ($name == '') {
- $name = $data['name'];
- }
-
- return '@[url=' . $data['url'] . ']' . $name . '[/url]';
- }
-
- /*
- * we don't want to support a bbcode specific markdown interpreter
- * and the markdown library we have is pretty good, but provides HTML output.
- * So we'll use that to convert to HTML, then convert the HTML back to bbcode,
- * and then clean up a few Diaspora specific constructs.
- */
- function diaspora2bb($s) {
-
- $s = html_entity_decode($s, ENT_COMPAT, 'UTF-8');
-
- // Handles single newlines
- $s = str_replace("\r\n", "\n", $s);
- $s = str_replace("\n", " \n", $s);
- $s = str_replace("\r", " \n", $s);
-
- // Replace lonely stars in lines not starting with it with literal stars
- $s = preg_replace('/^([^\*]+)\*([^\*]*)$/im', '$1\*$2', $s);
-
- // The parser cannot handle paragraphs correctly
- $s = str_replace(array('</p>', '<p>', '<p dir="ltr">'), array('<br>', '<br>', '<br>'), $s);
-
- // Escaping the hash tags
- $s = preg_replace('/\#([^\s\#])/', '#$1', $s);
-
- $s = Markdown($s);
-
- $regexp = "/@\{(?:([^\}]+?); )?([^\} ]+)\}/";
- $s = preg_replace_callback($regexp, 'diaspora_mention2bb', $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
- $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', '[youtube]$2[/youtube]', 'url', $s);
- $s = bb_tag_preg_replace('/\[url\=https?:\/\/www.youtube.com\/watch\?v\=(.*?)\].*?\[\/url\]/ism' , '[youtube]$1[/youtube]', 'url', $s);
- $s = bb_tag_preg_replace('/\[url\=?(.*?)\]https?:\/\/vimeo.com\/([0-9]+)(.*?)\[\/url\]/ism' , '[vimeo]$2[/vimeo]' , 'url', $s);
- $s = bb_tag_preg_replace('/\[url\=https?:\/\/vimeo.com\/([0-9]+)\](.*?)\[\/url\]/ism' , '[vimeo]$1[/vimeo]' , '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;
- }
-
- /**
- * @brief Callback function to replace a Friendica style mention in a mention for Diaspora
- *
- * @param array $match Matching values for the callback
- * @return string Replaced mention
- */
- function diaspora_mentions($match) {
-
- $contact = get_contact_details_by_url($match[3]);
-
- if (!x($contact, 'addr')) {
- $contact = Probe::uri($match[3]);
- }
-
- if (!x($contact, 'addr')) {
- return $match[0];
- }
-
- $mention = '@{' . $match[2] . '; ' . $contact['addr'] . '}';
- return $mention;
- }
-
- /**
- * @brief Converts a BBCode text into Markdown
- *
- * This function converts a BBCode item body to be sent to Markdown-enabled
- * systems like Diaspora and Libertree
- *
- * @param string $Text
- * @param bool $preserve_nl Effects unclear, unused in Friendica
- * @param bool $fordiaspora Diaspora requires more changes than Libertree
- * @return string
- */
- function bb2diaspora($Text, $preserve_nl = false, $fordiaspora = true) {
- $a = get_app();
-
- $OriginalText = $Text;
-
- // Since Diaspora is creating a summary for links, this function removes them before posting
- if ($fordiaspora) {
- $Text = bb_remove_share_information($Text);
- }
-
- /**
- * Transform #tags, strip off the [url] and replace spaces with underscore
- */
- $URLSearchString = "^\[\]";
- $Text = preg_replace_callback("/#\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/i",
- function ($matches) {
- return '#' . str_replace(' ', '_', $matches[2]);
- }
- , $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);
-
- // Extracting multi-line code blocks before the whitespace processing/code highlighter in bbcode()
- $codeblocks = [];
- $Text = preg_replace_callback('#\[code(?:=([^\]]*))?\](?=\n)(.*?)\[\/code\]#is',
- function ($matches) use (&$codeblocks) {
- $return = '#codeblock-' . count($codeblocks) . '#';
-
- $prefix = '````' . $matches[1] . PHP_EOL;
- $codeblocks[] = $prefix . trim($matches[2]) . PHP_EOL . '````';
- return $return;
- }
- , $Text);
-
- // Convert it to HTML - don't try oembed
- if ($fordiaspora) {
- $Text = bbcode($Text, $preserve_nl, false, 3);
-
- // Add all tags that maybe were removed
- if (preg_match_all("/#\[url\=([$URLSearchString]*)\](.*?)\[\/url\]/ism", $OriginalText, $tags)) {
- $tagline = "";
- foreach ($tags[2] as $tag) {
- $tag = html_entity_decode($tag, ENT_QUOTES, 'UTF-8');
- if (!strpos(html_entity_decode($Text, ENT_QUOTES, 'UTF-8'), '#' . $tag)) {
- $tagline .= '#' . $tag . ' ';
- }
- }
- $Text = $Text." ".$tagline;
- }
- } else {
- $Text = bbcode($Text, $preserve_nl, false, 4);
- }
-
- // mask some special HTML chars from conversation to markdown
- $Text = str_replace(array('<', '>', '&'), array('&_lt_;', '&_gt_;', '&_amp_;'), $Text);
-
- // If a link is followed by a quote then there should be a newline before it
- // Maybe we should make this newline at every time before a quote.
- $Text = str_replace(array("</a><blockquote>"), array("</a><br><blockquote>"), $Text);
-
- $stamp1 = microtime(true);
-
- // Now convert HTML to Markdown
- $converter = new HtmlConverter();
- $Text = $converter->convert($Text);
-
- // unmask the special chars back to HTML
- $Text = str_replace(array('&_lt_;', '&_gt_;', '&_amp_;'), array('<', '>', '&'), $Text);
-
- $a->save_timestamp($stamp1, "parser");
-
- // Libertree has a problem with escaped hashtags.
- $Text = str_replace(array('\#'), array('#'), $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);
-
- if ($fordiaspora) {
- $URLSearchString = "^\[\]";
- $Text = preg_replace_callback("/([@]\[(.*?)\])\(([$URLSearchString]*?)\)/ism", 'diaspora_mentions', $Text);
- }
-
- // Restore code blocks
- $Text = preg_replace_callback('/#codeblock-([0-9]+)#/iU',
- function ($matches) use ($codeblocks) {
- $return = '';
- if (isset($codeblocks[intval($matches[1])])) {
- $return = $codeblocks[$matches[1]];
- }
- return $return;
- }
- , $Text);
-
- call_hooks('bb2diaspora',$Text);
-
- return $Text;
- }
-
- function unescape_underscores_in_links($m) {
- $y = str_replace('\\_', '_', $m[2]);
- return('[' . $m[1] . '](' . $y . ')');
- }
-
- function format_event_diaspora($ev) {
- 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";
-
- $o .= '**' . (($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'] , $bd_format)))
- . '](' . App::get_baseurl() . '/localtime/?f=&time=' . urlencode(datetime_convert('UTC','UTC',$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'] , $bd_format )))
- . '](' . App::get_baseurl() . '/localtime/?f=&time=' . urlencode(datetime_convert('UTC','UTC',$ev['finish'])) . ")\n";
- }
-
- if (strlen($ev['location'])) {
- $o .= t('Location:') . bb2diaspora($ev['location'])
- . "\n";
- }
-
- $o .= "\n";
- return $o;
- }
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