[UTIL][Formatting][COMPONENT][Link][Tag] Refactor code from formatting into Link and Tag, where appropriate. Drop 'perfect url regex' as the one used in v2 is better

This commit is contained in:
Hugo Sales 2021-09-20 13:08:17 +01:00
parent 556b8f8265
commit e8f4563633
Signed by untrusted user: someonewithpc
GPG Key ID: 7D0C7EAFC9D835A0
3 changed files with 246 additions and 239 deletions

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@ -27,17 +27,11 @@ use App\Core\Modules\Component;
use App\Entity;
use App\Entity\NoteToLink;
use App\Util\Common;
use App\Util\HTML;
use InvalidArgumentException;
class Link extends Component
{
/**
* "Perfect URL Regex", courtesy of https://urlregex.com/
*/
const URL_REGEX = <<<END
%(?:(?:https?|ftp)://)(?:\\S+(?::\\S*)?@|\\d{1,3}(?:\\.\\d{1,3}){3}|(?:(?:[a-z\\d\\x{00a1}-\\x{ffff}]+-?)*[a-z\\d\\x{00a1}-\\x{ffff}]+)(?:\\.(?:[a-z\\d\\x{00a1}-\\x{ffff}]+-?)*[a-z\\d\\x{00a1}-\\x{ffff}]+)*(?:\\.[a-z\\x{00a1}-\\x{ffff}]{2,6}))(?::\\d+)?(?:[^\\s]*)?%iu
END;
/**
* Extract URLs from $content and create the appropriate Link and NoteToLink entities
*/
@ -45,10 +39,11 @@ END;
{
if (Common::config('attachments', 'process_links')) {
$matched_urls = [];
preg_match_all(self::URL_REGEX, $content, $matched_urls, PREG_SET_ORDER);
preg_match($this->getURLRegex(), $content, $matched_urls);
$matched_urls = array_unique($matched_urls);
foreach ($matched_urls as $match) {
try {
$link_id = Entity\Link::getOrCreate($match[0])->getId();
$link_id = Entity\Link::getOrCreate($match)->getId();
DB::persist(NoteToLink::create(['link_id' => $link_id, 'note_id' => $note_id]));
} catch (InvalidArgumentException) {
continue;
@ -57,4 +52,212 @@ END;
}
return Event::next;
}
public function onRenderContent(string &$text)
{
$text = $this->replaceURLs($text);
}
public function getURLRegex(): string
{
$geouri_labeltext_regex = '\pN\pL\-';
$geouri_mark_regex = '\-\_\.\!\~\*\\\'\(\)'; // the \\\' is really pretty
$geouri_unreserved_regex = '\pN\pL' . $geouri_mark_regex;
$geouri_punreserved_regex = '\[\]\:\&\+\$';
$geouri_pctencoded_regex = '(?:\%[0-9a-fA-F][0-9a-fA-F])';
$geouri_paramchar_regex = $geouri_unreserved_regex . $geouri_punreserved_regex; //FIXME: add $geouri_pctencoded_regex here so it works
return '#' .
'(?:^|[\s\<\>\(\)\[\]\{\}\\\'\\\";]+)(?![\@\!\#])' .
'(' .
'(?:' .
'(?:' . //Known protocols
'(?:' .
'(?:(?:' . implode('|', $this->URLSchemes(self::URL_SCHEME_COLON_DOUBLE_SLASH)) . ')://)' .
'|' .
'(?:(?:' . implode('|', $this->URLSchemes(self::URL_SCHEME_SINGLE_COLON)) . '):)' .
')' .
'(?:[\pN\pL\-\_\+\%\~]+(?::[\pN\pL\-\_\+\%\~]+)?\@)?' . //user:pass@
'(?:' .
'(?:' .
'\[[\pN\pL\-\_\:\.]+(?<![\.\:])\]' . //[dns]
')|(?:' .
'[\pN\pL\-\_\:\.]+(?<![\.\:])' . //dns
')' .
')' .
')' .
'|(?:' .
'(?:' . implode('|', $this->URLSchemes(self::URL_SCHEME_COLON_COORDINATES)) . '):' .
// There's an order that must be followed here too, if ;crs= is used, it must precede ;u=
// Also 'crsp' (;crs=$crsp) must match $geouri_labeltext_regex
// Also 'uval' (;u=$uval) must be a pnum: \-?[0-9]+
'(?:' .
'(?:[0-9]+(?:\.[0-9]+)?(?:\,[0-9]+(?:\.[0-9]+)?){1,2})' . // 1(.23)?(,4(.56)){1,2}
'(?:\;(?:[' . $geouri_labeltext_regex . ']+)(?:\=[' . $geouri_paramchar_regex . ']+)*)*' .
')' .
')' .
// URLs without domain name, like magnet:?xt=...
'|(?:(?:' . implode('|', $this->URLSchemes(self::URL_SCHEME_NO_DOMAIN)) . '):(?=\?))' . // zero-length lookahead requires ? after :
(Common::config('linkify', 'ipv4') // Convert IPv4 addresses to hyperlinks
? '|(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)'
: '') .
(Common::config('linkify', 'ipv6') // Convert IPv6 addresses to hyperlinks
? '|(?:' . //IPv6
'\[?(?:(?:(?:[0-9A-Fa-f]{1,4}:){7}(?:(?:[0-9A-Fa-f]{1,4})|:))|(?:(?:[0-9A-Fa-f]{1,4}:){6}(?::|(?:(?:25[0-5]|2[0-4]\d|[01]?\d{1,2})(?:\.(?:25[0-5]|2[0-4]\d|[01]?\d{1,2})){3})|(?::[0-9A-Fa-f]{1,4})))|(?:(?:[0-9A-Fa-f]{1,4}:){5}(?:(?::(?:(?:25[0-5]|2[0-4]\d|[01]?\d{1,2})(?:\.(?:25[0-5]|2[0-4]\d|[01]?\d{1,2})){3})?)|(?:(?::[0-9A-Fa-f]{1,4}){1,2})))|(?:(?:[0-9A-Fa-f]{1,4}:){4}(?::[0-9A-Fa-f]{1,4}){0,1}(?:(?::(?:(?:25[0-5]|2[0-4]\d|[01]?\d{1,2})(?:\.(?:25[0-5]|2[0-4]\d|[01]?\d{1,2})){3})?)|(?:(?::[0-9A-Fa-f]{1,4}){1,2})))|(?:(?:[0-9A-Fa-f]{1,4}:){3}(?::[0-9A-Fa-f]{1,4}){0,2}(?:(?::(?:(?:25[0-5]|2[0-4]\d|[01]?\d{1,2})(?:\.(?:25[0-5]|2[0-4]\d|[01]?\d{1,2})){3})?)|(?:(?::[0-9A-Fa-f]{1,4}){1,2})))|(?:(?:[0-9A-Fa-f]{1,4}:){2}(?::[0-9A-Fa-f]{1,4}){0,3}(?:(?::(?:(?:25[0-5]|2[0-4]\d|[01]?\d{1,2})(?:\.(?:25[0-5]|2[0-4]\d|[01]?\d{1,2})){3})?)|(?:(?::[0-9A-Fa-f]{1,4}){1,2})))|(?:(?:[0-9A-Fa-f]{1,4}:)(?::[0-9A-Fa-f]{1,4}){0,4}(?:(?::(?:(?:25[0-5]|2[0-4]\d|[01]?\d{1,2})(?:\.(?:25[0-5]|2[0-4]\d|[01]?\d{1,2})){3})?)|(?:(?::[0-9A-Fa-f]{1,4}){1,2})))|(?::(?::[0-9A-Fa-f]{1,4}){0,5}(?:(?::(?:(?:25[0-5]|2[0-4]\d|[01]?\d{1,2})(?:\.(?:25[0-5]|2[0-4]\d|[01]?\d{1,2})){3})?)|(?:(?::[0-9A-Fa-f]{1,4}){1,2})))|(?:(?:(?:25[0-5]|2[0-4]\d|[01]?\d{1,2})(?:\.(?:25[0-5]|2[0-4]\d|[01]?\d{1,2})){3})))\]?(?<!:)' .
')'
: '') .
(Common::config('linkify', 'bare_domains')
? '|(?:' . //DNS
'(?:[\pN\pL\-\_\+\%\~]+(?:\:[\pN\pL\-\_\+\%\~]+)?\@)?' . //user:pass@
'[\pN\pL\-\_]+(?:\.[\pN\pL\-\_]+)*\.' .
//tld list from http://data.iana.org/TLD/tlds-alpha-by-domain.txt, also added local, loc, and onion
'(?:AC|AD|AE|AERO|AF|AG|AI|AL|AM|AN|AO|AQ|AR|ARPA|AS|ASIA|AT|AU|AW|AX|AZ|BA|BB|BD|BE|BF|BG|BH|BI|BIZ|BJ|BM|BN|BO|BR|BS|BT|BV|BW|BY|BZ|CA|CAT|CC|CD|CF|CG|CH|CI|CK|CL|CM|CN|CO|COM|COOP|CR|CU|CV|CX|CY|CZ|DE|DJ|DK|DM|DO|DZ|EC|EDU|EE|EG|ER|ES|ET|EU|FI|FJ|FK|FM|FO|FR|GA|GB|GD|GE|GF|GG|GH|GI|GL|GM|GN|GOV|GP|GQ|GR|GS|GT|GU|GW|GY|HK|HM|HN|HR|HT|HU|ID|IE|IL|IM|IN|INFO|INT|IO|IQ|IR|IS|IT|JE|JM|JO|JOBS|JP|KE|KG|KH|KI|KM|KN|KP|KR|KW|KY|KZ|LA|LB|LC|LI|LK|LR|LS|LT|LU|LV|LY|MA|MC|MD|ME|MG|MH|MIL|MK|ML|MM|MN|MO|MOBI|MP|MQ|MR|MS|MT|MU|MUSEUM|MV|MW|MX|MY|MZ|NA|NAME|NC|NE|NET|NF|NG|NI|NL|NO|NP|NR|NU|NZ|OM|ORG|PA|PE|PF|PG|PH|PK|PL|PM|PN|PR|PRO|PS|PT|PW|PY|QA|RE|RO|RS|RU|RW|SA|SB|SC|SD|SE|SG|SH|SI|SJ|SK|SL|SM|SN|SO|SR|ST|SU|SV|SY|SZ|TC|TD|TEL|TF|TG|TH|TJ|TK|TL|TM|TN|TO|TP|TR|TRAVEL|TT|TV|TW|TZ|UA|UG|UK|US|UY|UZ|VA|VC|VE|VG|VI|VN|VU|WF|WS|XN--0ZWM56D|测试|XN--11B5BS3A9AJ6G|परीक्षा|XN--80AKHBYKNJ4F|испытание|XN--9T4B11YI5A|테스트|XN--DEBA0AD|טעסט|XN--G6W251D|測試|XN--HGBK6AJ7F53BBA|آزمایشی|XN--HLCJ6AYA9ESC7A|பரிட்சை|XN--JXALPDLP|δοκιμή|XN--KGBECHTV|إختبار|XN--ZCKZAH|テスト|YE|YT|YU|ZA|ZM|ZONE|ZW|local|loc|onion)' .
')(?![\pN\pL\-\_])'
: '') . // if common_config('linkify', 'bare_domains') is false, don't add anything here
')' .
'(?:' .
'(?:\:\d+)?' . //:port
'(?:/[' . URL_REGEX_VALID_PATH_CHARS . ']*)?' . // path
'(?:\?[' . URL_REGEX_VALID_QSTRING_CHARS . ']*)?' . // ?query string
'(?:\#[' . URL_REGEX_VALID_FRAGMENT_CHARS . ']*)?' . // #fragment
')(?<![' . URL_REGEX_EXCLUDED_END_CHARS . '])' .
')' .
'#ixu';
}
const URL_SCHEME_COLON_DOUBLE_SLASH = 1;
const URL_SCHEME_SINGLE_COLON = 2;
const URL_SCHEME_NO_DOMAIN = 4;
const URL_SCHEME_COLON_COORDINATES = 8;
public function URLSchemes($filter = null)
{
// TODO: move these to config
$schemes = [
'http' => self::URL_SCHEME_COLON_DOUBLE_SLASH,
'https' => self::URL_SCHEME_COLON_DOUBLE_SLASH,
'ftp' => self::URL_SCHEME_COLON_DOUBLE_SLASH,
'ftps' => self::URL_SCHEME_COLON_DOUBLE_SLASH,
'mms' => self::URL_SCHEME_COLON_DOUBLE_SLASH,
'rtsp' => self::URL_SCHEME_COLON_DOUBLE_SLASH,
'gopher' => self::URL_SCHEME_COLON_DOUBLE_SLASH,
'news' => self::URL_SCHEME_COLON_DOUBLE_SLASH,
'nntp' => self::URL_SCHEME_COLON_DOUBLE_SLASH,
'telnet' => self::URL_SCHEME_COLON_DOUBLE_SLASH,
'wais' => self::URL_SCHEME_COLON_DOUBLE_SLASH,
'file' => self::URL_SCHEME_COLON_DOUBLE_SLASH,
'prospero' => self::URL_SCHEME_COLON_DOUBLE_SLASH,
'webcal' => self::URL_SCHEME_COLON_DOUBLE_SLASH,
'irc' => self::URL_SCHEME_COLON_DOUBLE_SLASH,
'ircs' => self::URL_SCHEME_COLON_DOUBLE_SLASH,
'aim' => self::URL_SCHEME_SINGLE_COLON,
'bitcoin' => self::URL_SCHEME_SINGLE_COLON,
'fax' => self::URL_SCHEME_SINGLE_COLON,
'jabber' => self::URL_SCHEME_SINGLE_COLON,
'mailto' => self::URL_SCHEME_SINGLE_COLON,
'tel' => self::URL_SCHEME_SINGLE_COLON,
'xmpp' => self::URL_SCHEME_SINGLE_COLON,
'magnet' => self::URL_SCHEME_NO_DOMAIN,
'geo' => self::URL_SCHEME_COLON_COORDINATES,
];
return array_keys(array_filter($schemes, fn ($scheme) => is_null($filter) || ($scheme & $filter)));
}
/**
* Find links in the given text and pass them to the given callback function.
*
* @param string $text
*/
public function replaceURLs(string $text): string
{
$regex = $this->getURLRegex();
return preg_replace_callback($regex, fn ($matches) => $this->callbackHelper($matches, [$this, 'linkify']), $text);
}
/**
* Intermediate callback for `replaceURLs()`, which helps resolve some
* ambiguous link forms before passing on to the final callback.
*
* @param array $matches
* @param callable(string $text): string $callback: return replacement text
*
* @return string
*/
private function callbackHelper(array $matches, callable $callback): string
{
$url = $matches[1];
$left = strpos($matches[0], $url);
$right = $left + strlen($url);
$groupSymbolSets = [
[
'left' => '(',
'right' => ')',
],
[
'left' => '[',
'right' => ']',
],
[
'left' => '{',
'right' => '}',
],
[
'left' => '<',
'right' => '>',
],
];
$cannotEndWith = ['.', '?', ',', '#'];
do {
$original_url = $url;
foreach ($groupSymbolSets as $groupSymbolSet) {
if (substr($url, -1) == $groupSymbolSet['right']) {
$group_left_count = substr_count($url, $groupSymbolSet['left']);
$group_right_count = substr_count($url, $groupSymbolSet['right']);
if ($group_left_count < $group_right_count) {
--$right;
$url = substr($url, 0, -1);
}
}
}
if (in_array(substr($url, -1), $cannotEndWith)) {
--$right;
$url = substr($url, 0, -1);
}
} while ($original_url != $url);
$result = $callback($url);
return substr($matches[0], 0, $left) . $result . substr($matches[0], $right);
}
/**
* Convert a plain text $url to HTML <a>
*/
public function linkify(string $url): string
{
// It comes in special'd, so we unspecial it before passing to the stringifying
// functions
$url = htmlspecialchars_decode($url);
if (strpos($url, '@') !== false && strpos($url, ':') === false && ($email = filter_var($url, FILTER_VALIDATE_EMAIL)) !== false) {
//url is an email address without the mailto: protocol
$url = "mailto:{$email}";
}
$attrs = ['href' => $url, 'title' => $url];
// TODO Check to see whether this is a known "attachment" URL.
// Whether to nofollow
$nf = Common::config('nofollow', 'external');
if ($nf == 'never') {
$attrs['rel'] = 'external';
} else {
$attrs['rel'] = 'noopener nofollow external noreferrer';
}
return HTML::html(['a' => ['attrs' => $attrs, $url]], options: ['indent' => false]);
}
}

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@ -24,18 +24,29 @@ namespace Component\Tag;
use App\Core\DB\DB;
use App\Core\Event;
use App\Core\Modules\Component;
use App\Core\Router\Router;
use App\Entity\NoteTag;
use App\Util\Formatting;
use App\Util\HTML;
/**
* Component responsible for extracting tags from posted notes, as well as normalizing them
*
* @author Hugo Sales <hugo@hsal.es>
* @author Hugo Sales <hugo@hsal.es>
* @copyright 2021 Free Software Foundation, Inc http://www.fsf.org
* @license https://www.gnu.org/licenses/agpl.html GNU AGPL v3 or later
*/
class Tag extends Component
{
const TAG_REGEX = '/(?:^|\s)#([\pL\pN_\-\.]{1,64})/u'; // Brion Vibber 2011-02-23 v2:classes/Notice.php:367 function saveTags
const MAX_TAG_LENGTH = 64;
const TAG_REGEX = '/(^|\\s)(#[\\pL\\pN_\\-\\.]{1,64})/u'; // Brion Vibber 2011-02-23 v2:classes/Notice.php:367 function saveTags
const TAG_SLUG_REGEX = '[A-Za-z0-9]{1,64}';
public function onAddRoute($r): bool
{
$r->connect('tag', '/tag/{tag<' . self::TAG_SLUG_REGEX . '>}' , [Controller\Tag::class, 'tag']);
return Event::next;
}
/**
* Process note by extracting any tags present
@ -46,7 +57,8 @@ class Tag extends Component
$processed_tags = false;
preg_match_all(self::TAG_REGEX, $content, $matched_tags, PREG_SET_ORDER);
foreach ($matched_tags as $match) {
DB::persist($tag = NoteTag::create(['tag' => $match[0], 'note_id' => $note_id]));
$tag = $match[2];
DB::persist(NoteTag::create(['tag' => $tag, 'canonical' => $this->canonicalTag($tag), 'note_id' => $note_id]));
$processed_tags = true;
}
if ($processed_tags) {
@ -54,9 +66,20 @@ class Tag extends Component
}
}
public function onAddRoute($r): bool
public function onRenderContent(string &$text)
{
$r->connect('tag', '/tag/{tag' . self::TAG_REGEX . '}' , [Controller\Tag::class, 'tag']);
return Event::next;
$text = preg_replace_callback(self::TAG_REGEX, fn ($m) => $m[1] . $this->tagLink($m[2]), $text);
}
private function tagLink(string $tag): string
{
$canonical = $this->canonicalTag($tag);
$url = Router::url('tag', ['tag' => $canonical]);
return HTML::html(['a' => ['attrs' => ['href' => $url, 'title' => $tag, 'rel' => 'tag'], $tag]], options: ['indent' => false]);
}
public function canonicalTag(string $tag): string
{
return substr(Formatting::slugify($tag), 0, self::MAX_TAG_LENGTH);
}
}

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@ -32,7 +32,6 @@ namespace App\Util;
use App\Core\Event;
use App\Core\Log;
use App\Core\Router\Router;
use App\Entity\Actor;
use App\Entity\Group;
use App\Entity\Note;
@ -263,11 +262,9 @@ abstract class Formatting
// Split \n\n into paragraphs, process each paragrah and merge
$text = implode("\n", F\map(explode("\n\n", $text), function (string $paragraph) {
$paragraph = nl2br($paragraph, use_xhtml: false);
$paragraph = self::replaceURLs($paragraph, [self::class, 'linkify']);
$paragraph = preg_replace_callback('/(^|\&quot\;|\'|\(|\[|\{|\s+)(#[\pL\pN_\-\.]{1,64})/u',
fn ($m) => "{$m[1]}" . self::tagLink($m[2]), $paragraph);
Event::handle('RenderContent', [&$paragraph]);
return HTML::html(['p' => [$paragraph]], options: ['raw' => true]);
return HTML::html(['p' => [$paragraph]], options: ['raw' => true, 'indent' => false]);
}));
return $text;
@ -286,232 +283,16 @@ abstract class Formatting
return preg_replace(['/[\x{0}-\x{8}\x{b}-\x{c}\x{e}-\x{19}\x{200b}-\x{200f}\x{202a}-\x{202e}]/u', '/\R/u'], ['', "\n"], $text);
}
const URL_SCHEME_COLON_DOUBLE_SLASH = 1;
const URL_SCHEME_SINGLE_COLON = 2;
const URL_SCHEME_NO_DOMAIN = 4;
const URL_SCHEME_COLON_COORDINATES = 8;
public static function URLSchemes($filter = null)
{
// TODO: move these to config
$schemes = [
'http' => self::URL_SCHEME_COLON_DOUBLE_SLASH,
'https' => self::URL_SCHEME_COLON_DOUBLE_SLASH,
'ftp' => self::URL_SCHEME_COLON_DOUBLE_SLASH,
'ftps' => self::URL_SCHEME_COLON_DOUBLE_SLASH,
'mms' => self::URL_SCHEME_COLON_DOUBLE_SLASH,
'rtsp' => self::URL_SCHEME_COLON_DOUBLE_SLASH,
'gopher' => self::URL_SCHEME_COLON_DOUBLE_SLASH,
'news' => self::URL_SCHEME_COLON_DOUBLE_SLASH,
'nntp' => self::URL_SCHEME_COLON_DOUBLE_SLASH,
'telnet' => self::URL_SCHEME_COLON_DOUBLE_SLASH,
'wais' => self::URL_SCHEME_COLON_DOUBLE_SLASH,
'file' => self::URL_SCHEME_COLON_DOUBLE_SLASH,
'prospero' => self::URL_SCHEME_COLON_DOUBLE_SLASH,
'webcal' => self::URL_SCHEME_COLON_DOUBLE_SLASH,
'irc' => self::URL_SCHEME_COLON_DOUBLE_SLASH,
'ircs' => self::URL_SCHEME_COLON_DOUBLE_SLASH,
'aim' => self::URL_SCHEME_SINGLE_COLON,
'bitcoin' => self::URL_SCHEME_SINGLE_COLON,
'fax' => self::URL_SCHEME_SINGLE_COLON,
'jabber' => self::URL_SCHEME_SINGLE_COLON,
'mailto' => self::URL_SCHEME_SINGLE_COLON,
'tel' => self::URL_SCHEME_SINGLE_COLON,
'xmpp' => self::URL_SCHEME_SINGLE_COLON,
'magnet' => self::URL_SCHEME_NO_DOMAIN,
'geo' => self::URL_SCHEME_COLON_COORDINATES,
];
return array_keys(array_filter($schemes, fn ($scheme) => is_null($filter) || ($scheme & $filter)));
}
/**
* Find links in the given text and pass them to the given callback function.
*
* @param string $text
* @param callable(string $text, mixed $arg): string $callback: return replacement text
* @param mixed $arg: optional argument will be passed on to the callback
*/
public static function replaceURLs(string $text, callable $callback, mixed $arg = null)
{
$geouri_labeltext_regex = '\pN\pL\-';
$geouri_mark_regex = '\-\_\.\!\~\*\\\'\(\)'; // the \\\' is really pretty
$geouri_unreserved_regex = '\pN\pL' . $geouri_mark_regex;
$geouri_punreserved_regex = '\[\]\:\&\+\$';
$geouri_pctencoded_regex = '(?:\%[0-9a-fA-F][0-9a-fA-F])';
$geouri_paramchar_regex = $geouri_unreserved_regex . $geouri_punreserved_regex; //FIXME: add $geouri_pctencoded_regex here so it works
// Start off with a regex
$regex = '#' .
'(?:^|[\s\<\>\(\)\[\]\{\}\\\'\\\";]+)(?![\@\!\#])' .
'(' .
'(?:' .
'(?:' . //Known protocols
'(?:' .
'(?:(?:' . implode('|', self::URLSchemes(self::URL_SCHEME_COLON_DOUBLE_SLASH)) . ')://)' .
'|' .
'(?:(?:' . implode('|', self::URLSchemes(self::URL_SCHEME_SINGLE_COLON)) . '):)' .
')' .
'(?:[\pN\pL\-\_\+\%\~]+(?::[\pN\pL\-\_\+\%\~]+)?\@)?' . //user:pass@
'(?:' .
'(?:' .
'\[[\pN\pL\-\_\:\.]+(?<![\.\:])\]' . //[dns]
')|(?:' .
'[\pN\pL\-\_\:\.]+(?<![\.\:])' . //dns
')' .
')' .
')' .
'|(?:' .
'(?:' . implode('|', self::URLSchemes(self::URL_SCHEME_COLON_COORDINATES)) . '):' .
// There's an order that must be followed here too, if ;crs= is used, it must precede ;u=
// Also 'crsp' (;crs=$crsp) must match $geouri_labeltext_regex
// Also 'uval' (;u=$uval) must be a pnum: \-?[0-9]+
'(?:' .
'(?:[0-9]+(?:\.[0-9]+)?(?:\,[0-9]+(?:\.[0-9]+)?){1,2})' . // 1(.23)?(,4(.56)){1,2}
'(?:\;(?:[' . $geouri_labeltext_regex . ']+)(?:\=[' . $geouri_paramchar_regex . ']+)*)*' .
')' .
')' .
// URLs without domain name, like magnet:?xt=...
'|(?:(?:' . implode('|', self::URLSchemes(self::URL_SCHEME_NO_DOMAIN)) . '):(?=\?))' . // zero-length lookahead requires ? after :
(Common::config('linkify', 'ipv4') // Convert IPv4 addresses to hyperlinks
? '|(?:(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)\.){3}(?:25[0-5]|2[0-4][0-9]|[01]?[0-9][0-9]?)'
: '') .
(Common::config('linkify', 'ipv6') // Convert IPv6 addresses to hyperlinks
? '|(?:' . //IPv6
'\[?(?:(?:(?:[0-9A-Fa-f]{1,4}:){7}(?:(?:[0-9A-Fa-f]{1,4})|:))|(?:(?:[0-9A-Fa-f]{1,4}:){6}(?::|(?:(?:25[0-5]|2[0-4]\d|[01]?\d{1,2})(?:\.(?:25[0-5]|2[0-4]\d|[01]?\d{1,2})){3})|(?::[0-9A-Fa-f]{1,4})))|(?:(?:[0-9A-Fa-f]{1,4}:){5}(?:(?::(?:(?:25[0-5]|2[0-4]\d|[01]?\d{1,2})(?:\.(?:25[0-5]|2[0-4]\d|[01]?\d{1,2})){3})?)|(?:(?::[0-9A-Fa-f]{1,4}){1,2})))|(?:(?:[0-9A-Fa-f]{1,4}:){4}(?::[0-9A-Fa-f]{1,4}){0,1}(?:(?::(?:(?:25[0-5]|2[0-4]\d|[01]?\d{1,2})(?:\.(?:25[0-5]|2[0-4]\d|[01]?\d{1,2})){3})?)|(?:(?::[0-9A-Fa-f]{1,4}){1,2})))|(?:(?:[0-9A-Fa-f]{1,4}:){3}(?::[0-9A-Fa-f]{1,4}){0,2}(?:(?::(?:(?:25[0-5]|2[0-4]\d|[01]?\d{1,2})(?:\.(?:25[0-5]|2[0-4]\d|[01]?\d{1,2})){3})?)|(?:(?::[0-9A-Fa-f]{1,4}){1,2})))|(?:(?:[0-9A-Fa-f]{1,4}:){2}(?::[0-9A-Fa-f]{1,4}){0,3}(?:(?::(?:(?:25[0-5]|2[0-4]\d|[01]?\d{1,2})(?:\.(?:25[0-5]|2[0-4]\d|[01]?\d{1,2})){3})?)|(?:(?::[0-9A-Fa-f]{1,4}){1,2})))|(?:(?:[0-9A-Fa-f]{1,4}:)(?::[0-9A-Fa-f]{1,4}){0,4}(?:(?::(?:(?:25[0-5]|2[0-4]\d|[01]?\d{1,2})(?:\.(?:25[0-5]|2[0-4]\d|[01]?\d{1,2})){3})?)|(?:(?::[0-9A-Fa-f]{1,4}){1,2})))|(?::(?::[0-9A-Fa-f]{1,4}){0,5}(?:(?::(?:(?:25[0-5]|2[0-4]\d|[01]?\d{1,2})(?:\.(?:25[0-5]|2[0-4]\d|[01]?\d{1,2})){3})?)|(?:(?::[0-9A-Fa-f]{1,4}){1,2})))|(?:(?:(?:25[0-5]|2[0-4]\d|[01]?\d{1,2})(?:\.(?:25[0-5]|2[0-4]\d|[01]?\d{1,2})){3})))\]?(?<!:)' .
')'
: '') .
(Common::config('linkify', 'bare_domains')
? '|(?:' . //DNS
'(?:[\pN\pL\-\_\+\%\~]+(?:\:[\pN\pL\-\_\+\%\~]+)?\@)?' . //user:pass@
'[\pN\pL\-\_]+(?:\.[\pN\pL\-\_]+)*\.' .
//tld list from http://data.iana.org/TLD/tlds-alpha-by-domain.txt, also added local, loc, and onion
'(?:AC|AD|AE|AERO|AF|AG|AI|AL|AM|AN|AO|AQ|AR|ARPA|AS|ASIA|AT|AU|AW|AX|AZ|BA|BB|BD|BE|BF|BG|BH|BI|BIZ|BJ|BM|BN|BO|BR|BS|BT|BV|BW|BY|BZ|CA|CAT|CC|CD|CF|CG|CH|CI|CK|CL|CM|CN|CO|COM|COOP|CR|CU|CV|CX|CY|CZ|DE|DJ|DK|DM|DO|DZ|EC|EDU|EE|EG|ER|ES|ET|EU|FI|FJ|FK|FM|FO|FR|GA|GB|GD|GE|GF|GG|GH|GI|GL|GM|GN|GOV|GP|GQ|GR|GS|GT|GU|GW|GY|HK|HM|HN|HR|HT|HU|ID|IE|IL|IM|IN|INFO|INT|IO|IQ|IR|IS|IT|JE|JM|JO|JOBS|JP|KE|KG|KH|KI|KM|KN|KP|KR|KW|KY|KZ|LA|LB|LC|LI|LK|LR|LS|LT|LU|LV|LY|MA|MC|MD|ME|MG|MH|MIL|MK|ML|MM|MN|MO|MOBI|MP|MQ|MR|MS|MT|MU|MUSEUM|MV|MW|MX|MY|MZ|NA|NAME|NC|NE|NET|NF|NG|NI|NL|NO|NP|NR|NU|NZ|OM|ORG|PA|PE|PF|PG|PH|PK|PL|PM|PN|PR|PRO|PS|PT|PW|PY|QA|RE|RO|RS|RU|RW|SA|SB|SC|SD|SE|SG|SH|SI|SJ|SK|SL|SM|SN|SO|SR|ST|SU|SV|SY|SZ|TC|TD|TEL|TF|TG|TH|TJ|TK|TL|TM|TN|TO|TP|TR|TRAVEL|TT|TV|TW|TZ|UA|UG|UK|US|UY|UZ|VA|VC|VE|VG|VI|VN|VU|WF|WS|XN--0ZWM56D|测试|XN--11B5BS3A9AJ6G|परीक्षा|XN--80AKHBYKNJ4F|испытание|XN--9T4B11YI5A|테스트|XN--DEBA0AD|טעסט|XN--G6W251D|測試|XN--HGBK6AJ7F53BBA|آزمایشی|XN--HLCJ6AYA9ESC7A|பரிட்சை|XN--JXALPDLP|δοκιμή|XN--KGBECHTV|إختبار|XN--ZCKZAH|テスト|YE|YT|YU|ZA|ZM|ZONE|ZW|local|loc|onion)' .
')(?![\pN\pL\-\_])'
: '') . // if common_config('linkify', 'bare_domains') is false, don't add anything here
')' .
'(?:' .
'(?:\:\d+)?' . //:port
'(?:/[' . URL_REGEX_VALID_PATH_CHARS . ']*)?' . // path
'(?:\?[' . URL_REGEX_VALID_QSTRING_CHARS . ']*)?' . // ?query string
'(?:\#[' . URL_REGEX_VALID_FRAGMENT_CHARS . ']*)?' . // #fragment
')(?<![' . URL_REGEX_EXCLUDED_END_CHARS . '])' .
')' .
'#ixu';
return preg_replace_callback($regex, fn ($matches) => self::callbackHelper($matches, $callback, $arg), $text);
}
/**
* Intermediate callback for common_replace_links(), helps resolve some
* ambiguous link forms before passing on to the final callback.
*
* @param array $matches
* @param callable $callback
* @param mixed $arg optional argument to pass on as second param to callback
*
* @return string
*
*/
private static function callbackHelper(array $matches, callable $callback, mixed $arg = null): string
{
$url = $matches[1];
$left = strpos($matches[0], $url);
$right = $left + strlen($url);
$groupSymbolSets = [
[
'left' => '(',
'right' => ')',
],
[
'left' => '[',
'right' => ']',
],
[
'left' => '{',
'right' => '}',
],
[
'left' => '<',
'right' => '>',
],
];
$cannotEndWith = ['.', '?', ',', '#'];
do {
$original_url = $url;
foreach ($groupSymbolSets as $groupSymbolSet) {
if (substr($url, -1) == $groupSymbolSet['right']) {
$group_left_count = substr_count($url, $groupSymbolSet['left']);
$group_right_count = substr_count($url, $groupSymbolSet['right']);
if ($group_left_count < $group_right_count) {
--$right;
$url = substr($url, 0, -1);
}
}
}
if (in_array(substr($url, -1), $cannotEndWith)) {
--$right;
$url = substr($url, 0, -1);
}
} while ($original_url != $url);
$result = call_user_func_array($callback, [$url, $arg]);
return substr($matches[0], 0, $left) . $result . substr($matches[0], $right);
}
/**
* Convert a plain text $url to HTML <a>
*/
public static function linkify(string $url): string
{
// It comes in special'd, so we unspecial it before passing to the stringifying
// functions
$url = htmlspecialchars_decode($url);
if (strpos($url, '@') !== false && strpos($url, ':') === false && ($email = filter_var($url, FILTER_VALIDATE_EMAIL)) !== false) {
//url is an email address without the mailto: protocol
$url = "mailto:{$email}";
}
$attrs = ['href' => $url, 'title' => $url];
// TODO Check to see whether this is a known "attachment" URL.
// Whether to nofollow
$nf = Common::config('nofollow', 'external');
if ($nf == 'never') {
$attrs['rel'] = 'external';
} else {
$attrs['rel'] = 'noopener nofollow external noreferrer';
}
return HTML::html(['a' => ['attrs' => $attrs, $url]]);
}
public static function tagLink(string $tag): string
{
$canonical = self::canonicalTag($tag);
$url = Router::url('tag', ['tag' => $canonical]);
return HTML::html(['a' => ['attrs' => ['href' => $url, 'title' => $tag, 'rel' => 'tag'], $tag]]);
}
public static function canonicalTag(string $tag): string
{
return substr(self::slugify($tag), 0, 64);
}
/**
* Convert $str to it's closest ASCII representation
*/
public static function slugify(string $str): string
public static function slugify(string $str, int $length = 64): string
{
// php-intl is highly recommended...
if (!function_exists('transliterator_transliterate')) {
$str = preg_replace('/[^\pL\pN]/u', '', $str);
$str = mb_convert_case($str, MB_CASE_LOWER, 'UTF-8');
$str = substr($str, 0, 64);
$str = substr($str, 0, $length);
return $str;
}
$str = transliterator_transliterate('Any-Latin;' . // any charset to latin compatible
@ -522,7 +303,7 @@ abstract class Formatting
'Lower();' . // turn into lowercase
'Latin-ASCII;', // get ASCII equivalents (ð to d for example)
$str);
return preg_replace('/[^\pL\pN]/u', '', $str);
return substr(preg_replace('/[^\pL\pN]/u', '', $str), 0, $length);
}
/**