706 lines
		
	
	
	
		
			17 KiB
		
	
	
	
		
			PHP
		
	
	
	
	
	
			
		
		
	
	
			706 lines
		
	
	
	
		
			17 KiB
		
	
	
	
		
			PHP
		
	
	
	
	
	
<?php
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/**
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 * @file include/text.php
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 */
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use Friendica\App;
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use Friendica\Content\ContactSelector;
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use Friendica\Content\Feature;
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use Friendica\Content\Smilies;
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use Friendica\Content\Text\BBCode;
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use Friendica\Core\Addon;
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use Friendica\Core\Config;
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use Friendica\Core\L10n;
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use Friendica\Core\PConfig;
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use Friendica\Core\Protocol;
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use Friendica\Core\System;
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use Friendica\Database\DBA;
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use Friendica\Model\Contact;
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use Friendica\Model\Event;
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use Friendica\Model\Item;
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use Friendica\Render\FriendicaSmarty;
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use Friendica\Util\DateTimeFormat;
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use Friendica\Util\Map;
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use Friendica\Util\Proxy as ProxyUtils;
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use Friendica\Core\Logger;
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use Friendica\Core\Renderer;
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use Friendica\Model\FileTag;
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use Friendica\Util\XML;
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use Friendica\Content\Text\HTML;
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require_once "include/conversation.php";
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/**
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 * @brief Generates a pseudo-random string of hexadecimal characters
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 *
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 * @param int $size
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 * @return string
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 */
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function random_string($size = 64)
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{
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	$byte_size = ceil($size / 2);
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	$bytes = random_bytes($byte_size);
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	$return = substr(bin2hex($bytes), 0, $size);
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	return $return;
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}
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/**
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 * This is our primary input filter.
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 *
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 * The high bit hack only involved some old IE browser, forget which (IE5/Mac?)
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 * that had an XSS attack vector due to stripping the high-bit on an 8-bit character
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 * after cleansing, and angle chars with the high bit set could get through as markup.
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 *
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 * This is now disabled because it was interfering with some legitimate unicode sequences
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 * and hopefully there aren't a lot of those browsers left.
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 *
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 * Use this on any text input where angle chars are not valid or permitted
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 * They will be replaced with safer brackets. This may be filtered further
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 * if these are not allowed either.
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 *
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 * @param string $string Input string
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 * @return string Filtered string
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 */
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function notags($string) {
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	return str_replace(["<", ">"], ['[', ']'], $string);
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//  High-bit filter no longer used
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//	return str_replace(array("<",">","\xBA","\xBC","\xBE"), array('[',']','','',''), $string);
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}
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/**
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 * use this on "body" or "content" input where angle chars shouldn't be removed,
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 * and allow them to be safely displayed.
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 * @param string $string
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 * @return string
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 */
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function escape_tags($string) {
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	return htmlspecialchars($string, ENT_COMPAT, 'UTF-8', false);
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}
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/**
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 * generate a string that's random, but usually pronounceable.
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 * used to generate initial passwords
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 * @param int $len
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 * @return string
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 */
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function autoname($len) {
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	if ($len <= 0) {
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		return '';
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	}
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	$vowels = ['a','a','ai','au','e','e','e','ee','ea','i','ie','o','ou','u'];
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	if (mt_rand(0, 5) == 4) {
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		$vowels[] = 'y';
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	}
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	$cons = [
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			'b','bl','br',
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			'c','ch','cl','cr',
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			'd','dr',
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			'f','fl','fr',
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			'g','gh','gl','gr',
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			'h',
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			'j',
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			'k','kh','kl','kr',
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			'l',
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			'm',
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			'n',
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			'p','ph','pl','pr',
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			'qu',
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			'r','rh',
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			's','sc','sh','sm','sp','st',
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			't','th','tr',
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			'v',
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			'w','wh',
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			'x',
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			'z','zh'
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			];
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	$midcons = ['ck','ct','gn','ld','lf','lm','lt','mb','mm', 'mn','mp',
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				'nd','ng','nk','nt','rn','rp','rt'];
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	$noend = ['bl', 'br', 'cl','cr','dr','fl','fr','gl','gr',
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				'kh', 'kl','kr','mn','pl','pr','rh','tr','qu','wh','q'];
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	$start = mt_rand(0,2);
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	if ($start == 0) {
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		$table = $vowels;
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	} else {
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		$table = $cons;
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	}
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	$word = '';
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	for ($x = 0; $x < $len; $x ++) {
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		$r = mt_rand(0,count($table) - 1);
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		$word .= $table[$r];
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		if ($table == $vowels) {
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			$table = array_merge($cons,$midcons);
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		} else {
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			$table = $vowels;
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		}
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	}
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	$word = substr($word,0,$len);
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	foreach ($noend as $noe) {
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		$noelen = strlen($noe);
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		if ((strlen($word) > $noelen) && (substr($word, -$noelen) == $noe)) {
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			$word = autoname($len);
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			break;
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		}
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	}
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	return $word;
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}
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/**
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 * Turn user/group ACLs stored as angle bracketed text into arrays
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 *
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 * @param string $s
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 * @return array
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 */
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function expand_acl($s) {
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	// turn string array of angle-bracketed elements into numeric array
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	// e.g. "<1><2><3>" => array(1,2,3);
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	$ret = [];
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	if (strlen($s)) {
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		$t = str_replace('<', '', $s);
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		$a = explode('>', $t);
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		foreach ($a as $aa) {
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			if (intval($aa)) {
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				$ret[] = intval($aa);
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			}
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		}
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	}
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	return $ret;
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}
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/**
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 * Wrap ACL elements in angle brackets for storage
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 * @param string $item
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 */
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function sanitise_acl(&$item) {
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	if (intval($item)) {
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		$item = '<' . intval(notags(trim($item))) . '>';
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	} else {
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		unset($item);
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	}
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}
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/**
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 * Convert an ACL array to a storable string
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 *
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 * Normally ACL permissions will be an array.
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 * We'll also allow a comma-separated string.
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 *
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 * @param string|array $p
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 * @return string
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 */
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function perms2str($p) {
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	$ret = '';
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	if (is_array($p)) {
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		$tmp = $p;
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	} else {
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		$tmp = explode(',', $p);
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	}
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	if (is_array($tmp)) {
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		array_walk($tmp, 'sanitise_acl');
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		$ret = implode('', $tmp);
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	}
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	return $ret;
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}
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/**
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 *  for html,xml parsing - let's say you've got
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 *  an attribute foobar="class1 class2 class3"
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 *  and you want to find out if it contains 'class3'.
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 *  you can't use a normal sub string search because you
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 *  might match 'notclass3' and a regex to do the job is
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 *  possible but a bit complicated.
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 *  pass the attribute string as $attr and the attribute you
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 *  are looking for as $s - returns true if found, otherwise false
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 *
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 * @param string $attr attribute value
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 * @param string $s string to search
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 * @return boolean True if found, False otherwise
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 */
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function attribute_contains($attr, $s) {
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	$a = explode(' ', $attr);
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	return (count($a) && in_array($s,$a));
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}
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/**
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 * Compare activity uri. Knows about activity namespace.
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 *
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 * @param string $haystack
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 * @param string $needle
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 * @return boolean
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 */
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function activity_match($haystack,$needle) {
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	return (($haystack === $needle) || ((basename($needle) === $haystack) && strstr($needle, NAMESPACE_ACTIVITY_SCHEMA)));
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}
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/**
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 * @brief Pull out all #hashtags and @person tags from $string.
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 *
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 * We also get @person@domain.com - which would make
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 * the regex quite complicated as tags can also
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 * end a sentence. So we'll run through our results
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 * and strip the period from any tags which end with one.
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 * Returns array of tags found, or empty array.
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 *
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 * @param string $string Post content
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 * @return array List of tag and person names
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 */
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function get_tags($string) {
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	$ret = [];
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	// Convert hashtag links to hashtags
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	$string = preg_replace('/#\[url\=([^\[\]]*)\](.*?)\[\/url\]/ism', '#$2', $string);
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	// ignore anything in a code block
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	$string = preg_replace('/\[code\](.*?)\[\/code\]/sm', '', $string);
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	// Force line feeds at bbtags
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	$string = str_replace(['[', ']'], ["\n[", "]\n"], $string);
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	// ignore anything in a bbtag
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	$string = preg_replace('/\[(.*?)\]/sm', '', $string);
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	// Match full names against @tags including the space between first and last
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	// We will look these up afterward to see if they are full names or not recognisable.
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	if (preg_match_all('/(@[^ \x0D\x0A,:?]+ [^ \x0D\x0A@,:?]+)([ \x0D\x0A@,:?]|$)/', $string, $matches)) {
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		foreach ($matches[1] as $match) {
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			if (strstr($match, ']')) {
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				// we might be inside a bbcode color tag - leave it alone
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				continue;
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			}
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			if (substr($match, -1, 1) === '.') {
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				$ret[] = substr($match, 0, -1);
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			} else {
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				$ret[] = $match;
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			}
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		}
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	}
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	// Otherwise pull out single word tags. These can be @nickname, @first_last
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	// and #hash tags.
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	if (preg_match_all('/([!#@][^\^ \x0D\x0A,;:?]+)([ \x0D\x0A,;:?]|$)/', $string, $matches)) {
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		foreach ($matches[1] as $match) {
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			if (strstr($match, ']')) {
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				// we might be inside a bbcode color tag - leave it alone
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				continue;
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			}
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			if (substr($match, -1, 1) === '.') {
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				$match = substr($match,0,-1);
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			}
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			// ignore strictly numeric tags like #1
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			if ((strpos($match, '#') === 0) && ctype_digit(substr($match, 1))) {
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				continue;
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			}
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			// try not to catch url fragments
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			if (strpos($string, $match) && preg_match('/[a-zA-z0-9\/]/', substr($string, strpos($string, $match) - 1, 1))) {
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				continue;
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			}
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			$ret[] = $match;
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		}
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	}
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	return $ret;
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}
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/**
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 * quick and dirty quoted_printable encoding
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 *
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 * @param string $s
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 * @return string
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 */
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function qp($s) {
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	return str_replace("%", "=", rawurlencode($s));
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}
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/**
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 * @brief Check for a valid email string
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 *
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 * @param string $email_address
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 * @return boolean
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 */
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function valid_email($email_address)
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{
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	return preg_match('/^[_a-zA-Z0-9\-\+]+(\.[_a-zA-Z0-9\-\+]+)*@[a-zA-Z0-9-]+(\.[a-zA-Z0-9-]+)+$/', $email_address);
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}
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/**
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 * Normalize url
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 *
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 * @param string $url
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 * @return string
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 */
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function normalise_link($url) {
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	$ret = str_replace(['https:', '//www.'], ['http:', '//'], $url);
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	return rtrim($ret,'/');
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}
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/**
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 * Compare two URLs to see if they are the same, but ignore
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 * slight but hopefully insignificant differences such as if one
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 * is https and the other isn't, or if one is www.something and
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 * the other isn't - and also ignore case differences.
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 *
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 * @param string $a first url
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 * @param string $b second url
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 * @return boolean True if the URLs match, otherwise False
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 *
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 */
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function link_compare($a, $b) {
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	return (strcasecmp(normalise_link($a), normalise_link($b)) === 0);
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}
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/**
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 * @brief Find any non-embedded images in private items and add redir links to them
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 *
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 * @param App $a
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 * @param array &$item The field array of an item row
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 */
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function redir_private_images($a, &$item)
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{
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	$matches = false;
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	$cnt = preg_match_all('|\[img\](http[^\[]*?/photo/[a-fA-F0-9]+?(-[0-9]\.[\w]+?)?)\[\/img\]|', $item['body'], $matches, PREG_SET_ORDER);
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	if ($cnt) {
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		foreach ($matches as $mtch) {
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			if (strpos($mtch[1], '/redir') !== false) {
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				continue;
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			}
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			if ((local_user() == $item['uid']) && ($item['private'] == 1) && ($item['contact-id'] != $a->contact['id']) && ($item['network'] == Protocol::DFRN)) {
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				$img_url = 'redir?f=1&quiet=1&url=' . urlencode($mtch[1]) . '&conurl=' . urlencode($item['author-link']);
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				$item['body'] = str_replace($mtch[0], '[img]' . $img_url . '[/img]', $item['body']);
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			}
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		}
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	}
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}
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/**
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 * @brief Given a text string, convert from bbcode to html and add smilie icons.
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 *
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 * @param string $text String with bbcode.
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 * @return string Formattet HTML.
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 */
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function prepare_text($text) {
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	if (stristr($text, '[nosmile]')) {
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		$s = BBCode::convert($text);
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	} else {
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		$s = Smilies::replace(BBCode::convert($text));
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	}
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	return trim($s);
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}
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/**
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 * return array with details for categories and folders for an item
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 *
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 * @param array $item
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 * @return array
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 *
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  * [
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 *      [ // categories array
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 *          {
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 *               'name': 'category name',
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 *               'removeurl': 'url to remove this category',
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 *               'first': 'is the first in this array? true/false',
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 *               'last': 'is the last in this array? true/false',
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 *           } ,
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 *           ....
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 *       ],
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 *       [ //folders array
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 *			{
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 *               'name': 'folder name',
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 *               'removeurl': 'url to remove this folder',
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 *               'first': 'is the first in this array? true/false',
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 *               'last': 'is the last in this array? true/false',
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 *           } ,
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 *           ....
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 *       ]
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 *  ]
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 */
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function get_cats_and_terms($item)
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{
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	$categories = [];
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	$folders = [];
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	$matches = false;
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	$first = true;
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	$cnt = preg_match_all('/<(.*?)>/', $item['file'], $matches, PREG_SET_ORDER);
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	if ($cnt) {
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		foreach ($matches as $mtch) {
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			$categories[] = [
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				'name' => XML::escape(FileTag::decode($mtch[1])),
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				'url' =>  "#",
 | 
						|
				'removeurl' => ((local_user() == $item['uid'])?'filerm/' . $item['id'] . '?f=&cat=' . XML::escape(FileTag::decode($mtch[1])):""),
 | 
						|
				'first' => $first,
 | 
						|
				'last' => false
 | 
						|
			];
 | 
						|
			$first = false;
 | 
						|
		}
 | 
						|
	}
 | 
						|
 | 
						|
	if (count($categories)) {
 | 
						|
		$categories[count($categories) - 1]['last'] = true;
 | 
						|
	}
 | 
						|
 | 
						|
	if (local_user() == $item['uid']) {
 | 
						|
		$matches = false;
 | 
						|
		$first = true;
 | 
						|
		$cnt = preg_match_all('/\[(.*?)\]/', $item['file'], $matches, PREG_SET_ORDER);
 | 
						|
		if ($cnt) {
 | 
						|
			foreach ($matches as $mtch) {
 | 
						|
				$folders[] = [
 | 
						|
					'name' => XML::escape(FileTag::decode($mtch[1])),
 | 
						|
					'url' =>  "#",
 | 
						|
					'removeurl' => ((local_user() == $item['uid']) ? 'filerm/' . $item['id'] . '?f=&term=' . XML::escape(FileTag::decode($mtch[1])) : ""),
 | 
						|
					'first' => $first,
 | 
						|
					'last' => false
 | 
						|
				];
 | 
						|
				$first = false;
 | 
						|
			}
 | 
						|
		}
 | 
						|
	}
 | 
						|
 | 
						|
	if (count($folders)) {
 | 
						|
		$folders[count($folders) - 1]['last'] = true;
 | 
						|
	}
 | 
						|
 | 
						|
	return [$categories, $folders];
 | 
						|
}
 | 
						|
 | 
						|
 | 
						|
/**
 | 
						|
 * get private link for item
 | 
						|
 * @param array $item
 | 
						|
 * @return boolean|array False if item has not plink, otherwise array('href'=>plink url, 'title'=>translated title)
 | 
						|
 */
 | 
						|
function get_plink($item) {
 | 
						|
	$a = get_app();
 | 
						|
 | 
						|
	if ($a->user['nickname'] != "") {
 | 
						|
		$ret = [
 | 
						|
				//'href' => "display/" . $a->user['nickname'] . "/" . $item['id'],
 | 
						|
				'href' => "display/" . $item['guid'],
 | 
						|
				'orig' => "display/" . $item['guid'],
 | 
						|
				'title' => L10n::t('View on separate page'),
 | 
						|
				'orig_title' => L10n::t('view on separate page'),
 | 
						|
			];
 | 
						|
 | 
						|
		if (x($item, 'plink')) {
 | 
						|
			$ret["href"] = $a->removeBaseURL($item['plink']);
 | 
						|
			$ret["title"] = L10n::t('link to source');
 | 
						|
		}
 | 
						|
 | 
						|
	} elseif (x($item, 'plink') && ($item['private'] != 1)) {
 | 
						|
		$ret = [
 | 
						|
				'href' => $item['plink'],
 | 
						|
				'orig' => $item['plink'],
 | 
						|
				'title' => L10n::t('link to source'),
 | 
						|
			];
 | 
						|
	} else {
 | 
						|
		$ret = [];
 | 
						|
	}
 | 
						|
 | 
						|
	return $ret;
 | 
						|
}
 | 
						|
 | 
						|
/**
 | 
						|
 * return number of bytes in size (K, M, G)
 | 
						|
 * @param string $size_str
 | 
						|
 * @return number
 | 
						|
 */
 | 
						|
function return_bytes($size_str) {
 | 
						|
	switch (substr ($size_str, -1)) {
 | 
						|
		case 'M': case 'm': return (int)$size_str * 1048576;
 | 
						|
		case 'K': case 'k': return (int)$size_str * 1024;
 | 
						|
		case 'G': case 'g': return (int)$size_str * 1073741824;
 | 
						|
		default: return $size_str;
 | 
						|
	}
 | 
						|
}
 | 
						|
 | 
						|
/**
 | 
						|
 * @param string $s
 | 
						|
 * @param boolean $strip_padding
 | 
						|
 * @return string
 | 
						|
 */
 | 
						|
function base64url_encode($s, $strip_padding = false) {
 | 
						|
 | 
						|
	$s = strtr(base64_encode($s), '+/', '-_');
 | 
						|
 | 
						|
	if ($strip_padding) {
 | 
						|
		$s = str_replace('=','',$s);
 | 
						|
	}
 | 
						|
 | 
						|
	return $s;
 | 
						|
}
 | 
						|
 | 
						|
/**
 | 
						|
 * @param string $s
 | 
						|
 * @return string
 | 
						|
 */
 | 
						|
function base64url_decode($s) {
 | 
						|
 | 
						|
	if (is_array($s)) {
 | 
						|
		Logger::log('base64url_decode: illegal input: ' . print_r(debug_backtrace(), true));
 | 
						|
		return $s;
 | 
						|
	}
 | 
						|
 | 
						|
/*
 | 
						|
 *  // Placeholder for new rev of salmon which strips base64 padding.
 | 
						|
 *  // PHP base64_decode handles the un-padded input without requiring this step
 | 
						|
 *  // Uncomment if you find you need it.
 | 
						|
 *
 | 
						|
 *	$l = strlen($s);
 | 
						|
 *	if (!strpos($s,'=')) {
 | 
						|
 *		$m = $l % 4;
 | 
						|
 *		if ($m == 2)
 | 
						|
 *			$s .= '==';
 | 
						|
 *		if ($m == 3)
 | 
						|
 *			$s .= '=';
 | 
						|
 *	}
 | 
						|
 *
 | 
						|
 */
 | 
						|
 | 
						|
	return base64_decode(strtr($s,'-_','+/'));
 | 
						|
}
 | 
						|
 | 
						|
 | 
						|
function bb_translate_video($s) {
 | 
						|
 | 
						|
	$matches = null;
 | 
						|
	$r = preg_match_all("/\[video\](.*?)\[\/video\]/ism",$s,$matches,PREG_SET_ORDER);
 | 
						|
	if ($r) {
 | 
						|
		foreach ($matches as $mtch) {
 | 
						|
			if ((stristr($mtch[1], 'youtube')) || (stristr($mtch[1], 'youtu.be'))) {
 | 
						|
				$s = str_replace($mtch[0], '[youtube]' . $mtch[1] . '[/youtube]', $s);
 | 
						|
			} elseif (stristr($mtch[1], 'vimeo')) {
 | 
						|
				$s = str_replace($mtch[0], '[vimeo]' . $mtch[1] . '[/vimeo]', $s);
 | 
						|
			}
 | 
						|
		}
 | 
						|
	}
 | 
						|
	return $s;
 | 
						|
}
 | 
						|
 | 
						|
function normalise_openid($s) {
 | 
						|
	return trim(str_replace(['http://', 'https://'], ['', ''], $s), '/');
 | 
						|
}
 | 
						|
 | 
						|
 | 
						|
function undo_post_tagging($s) {
 | 
						|
	$matches = null;
 | 
						|
	$cnt = preg_match_all('/([!#@])\[url=(.*?)\](.*?)\[\/url\]/ism', $s, $matches, PREG_SET_ORDER);
 | 
						|
	if ($cnt) {
 | 
						|
		foreach ($matches as $mtch) {
 | 
						|
			if (in_array($mtch[1], ['!', '@'])) {
 | 
						|
				$contact = Contact::getDetailsByURL($mtch[2]);
 | 
						|
				$mtch[3] = empty($contact['addr']) ? $mtch[2] : $contact['addr'];
 | 
						|
			}
 | 
						|
			$s = str_replace($mtch[0], $mtch[1] . $mtch[3],$s);
 | 
						|
		}
 | 
						|
	}
 | 
						|
	return $s;
 | 
						|
}
 | 
						|
 | 
						|
function protect_sprintf($s) {
 | 
						|
	return str_replace('%', '%%', $s);
 | 
						|
}
 | 
						|
 | 
						|
/// @TODO Rewrite this
 | 
						|
function is_a_date_arg($s) {
 | 
						|
	$i = intval($s);
 | 
						|
 | 
						|
	if ($i > 1900) {
 | 
						|
		$y = date('Y');
 | 
						|
 | 
						|
		if ($i <= $y + 1 && strpos($s, '-') == 4) {
 | 
						|
			$m = intval(substr($s, 5));
 | 
						|
 | 
						|
			if ($m > 0 && $m <= 12) {
 | 
						|
				return true;
 | 
						|
			}
 | 
						|
		}
 | 
						|
	}
 | 
						|
 | 
						|
	return false;
 | 
						|
}
 | 
						|
 | 
						|
/**
 | 
						|
 * remove intentation from a text
 | 
						|
 */
 | 
						|
function deindent($text, $chr = "[\t ]", $count = NULL) {
 | 
						|
	$lines = explode("\n", $text);
 | 
						|
 | 
						|
	if (is_null($count)) {
 | 
						|
		$m = [];
 | 
						|
		$k = 0;
 | 
						|
		while ($k < count($lines) && strlen($lines[$k]) == 0) {
 | 
						|
			$k++;
 | 
						|
		}
 | 
						|
		preg_match("|^" . $chr . "*|", $lines[$k], $m);
 | 
						|
		$count = strlen($m[0]);
 | 
						|
	}
 | 
						|
 | 
						|
	for ($k = 0; $k < count($lines); $k++) {
 | 
						|
		$lines[$k] = preg_replace("|^" . $chr . "{" . $count . "}|", "", $lines[$k]);
 | 
						|
	}
 | 
						|
 | 
						|
	return implode("\n", $lines);
 | 
						|
}
 | 
						|
 | 
						|
function formatBytes($bytes, $precision = 2) {
 | 
						|
	$units = ['B', 'KB', 'MB', 'GB', 'TB'];
 | 
						|
 | 
						|
	$bytes = max($bytes, 0);
 | 
						|
	$pow = floor(($bytes ? log($bytes) : 0) / log(1024));
 | 
						|
	$pow = min($pow, count($units) - 1);
 | 
						|
 | 
						|
	$bytes /= pow(1024, $pow);
 | 
						|
 | 
						|
	return round($bytes, $precision) . ' ' . $units[$pow];
 | 
						|
}
 | 
						|
 | 
						|
/**
 | 
						|
 * @brief translate and format the networkname of a contact
 | 
						|
 *
 | 
						|
 * @param string $network
 | 
						|
 *	Networkname of the contact (e.g. dfrn, rss and so on)
 | 
						|
 * @param sting $url
 | 
						|
 *	The contact url
 | 
						|
 * @return string
 | 
						|
 */
 | 
						|
function format_network_name($network, $url = 0) {
 | 
						|
	if ($network != "") {
 | 
						|
		if ($url != "") {
 | 
						|
			$network_name = '<a href="'.$url.'">'.ContactSelector::networkToName($network, $url)."</a>";
 | 
						|
		} else {
 | 
						|
			$network_name = ContactSelector::networkToName($network);
 | 
						|
		}
 | 
						|
 | 
						|
		return $network_name;
 | 
						|
	}
 | 
						|
}
 |