Friendica Communications Platform (please note that this is a clone of the repository at github, issues are handled there) https://friendi.ca
You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
 
 
 
 
 

670 lines
16 KiB

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