namespace Friendica\Util;
+use Friendica\Content\ContactSelector;
+use Friendica\Core\Logger;
+
/**
- * @brief This class contains methods to modify/transform strings.
+ * @brief This class handles string functions
*/
class Strings
{
+ /**
+ * @brief Generates a pseudo-random string of hexadecimal characters
+ *
+ * @param int $size
+ * @return string
+ * @throws \Exception
+ */
+ public static function getRandomHex($size = 64)
+ {
+ $byte_size = ceil($size / 2);
+
+ $bytes = random_bytes($byte_size);
+
+ $return = substr(bin2hex($bytes), 0, $size);
+
+ return $return;
+ }
+
+ /**
+ * @brief This is our primary input filter.
+ *
+ * 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 $string Input string
+ * @return string Filtered string
+ */
+ public static function escapeTags($string)
+ {
+ return str_replace(["<", ">"], ['[', ']'], $string);
+ }
+
+ /**
+ * @brief Use this on "body" or "content" input where angle chars shouldn't be removed,
+ * and allow them to be safely displayed.
+ * @param string $string
+ *
+ * @return string
+ */
+ public static function escapeHtml($string)
+ {
+ return htmlspecialchars($string, ENT_COMPAT, 'UTF-8', false);
+ }
+
+ /**
+ * @brief Generate a string that's random, but usually pronounceable. Used to generate initial passwords
+ *
+ * @param int $len length
+ *
+ * @return string
+ */
+ public static function getRandomName($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)) {
+ $word = self::getRandomName($len);
+ break;
+ }
+ }
+
+ return $word;
+ }
+
+ /**
+ * Translate and format the network name of a contact
+ *
+ * @param string $network Network name of the contact (e.g. dfrn, rss and so on)
+ * @param string $url The contact url
+ *
+ * @return string Formatted network name
+ * @throws \Friendica\Network\HTTPException\InternalServerErrorException
+ */
+ public static function formatNetworkName($network, $url = '')
+ {
+ if ($network != '') {
+ if ($url != '') {
+ $network_name = '<a href="' . $url .'">' . ContactSelector::networkToName($network, $url) . '</a>';
+ } else {
+ $network_name = ContactSelector::networkToName($network);
+ }
+
+ return $network_name;
+ }
+ }
+
/**
- * escape text ($str) for XML transport
- * @param string $str
- * @return string Escaped text.
+ * @brief Remove indentation from a text
+ *
+ * @param string $text String to be transformed.
+ * @param string $chr Optional. Indentation tag. Default tab (\t).
+ * @param int $count Optional. Default null.
+ *
+ * @return string Transformed string.
+ */
+ public static function deindent($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);
+ }
+
+ /**
+ * @brief Get byte size returned in a Data Measurement (KB, MB, GB)
+ *
+ * @param int $bytes The number of bytes to be measured
+ * @param int $precision Optional. Default 2.
+ *
+ * @return string Size with measured units.
+ */
+ public static function formatBytes($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 Protect percent characters in sprintf calls
+ *
+ * @param string $s String to transform.
+ *
+ * @return string Transformed string.
+ */
+ public static function protectSprintf($s)
+ {
+ return str_replace('%', '%%', $s);
+ }
+
+ /**
+ * @brief Base64 Encode URL and translate +/ to -_ Optionally strip padding.
+ *
+ * @param string $s URL to encode
+ * @param boolean $strip_padding Optional. Default false
+ *
+ * @return string Encoded URL
+ */
+ public static function base64UrlEncode($s, $strip_padding = false)
+ {
+ $s = strtr(base64_encode($s), '+/', '-_');
+
+ if ($strip_padding) {
+ $s = str_replace('=', '', $s);
+ }
+
+ return $s;
+ }
+
+ /**
+ * @brief Decode Base64 Encoded URL and translate -_ to +/
+ * @param string $s URL to decode
+ *
+ * @return string Decoded URL
+ * @throws \Exception
+ */
+ public static function base64UrlDecode($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, '-_', '+/'));
+ }
+
+ /**
+ * @brief Normalize url
+ *
+ * @param string $url URL to be normalized.
+ *
+ * @return string Normalized URL.
+ */
+ public static function normaliseLink($url)
+ {
+ $ret = str_replace(['https:', '//www.'], ['http:', '//'], $url);
+ return rtrim($ret, '/');
+ }
+
+ /**
+ * @brief Normalize OpenID identity
+ *
+ * @param string $s OpenID Identity
+ *
+ * @return string normalized OpenId Identity
+ */
+ public static function normaliseOpenID($s)
+ {
+ return trim(str_replace(['http://', 'https://'], ['', ''], $s), '/');
+ }
+
+ /**
+ * @brief 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 $b second url
+ * @return boolean True if the URLs match, otherwise False
+ *
+ */
+ public static function compareLink($a, $b)
+ {
+ return (strcasecmp(self::normaliseLink($a), self::normaliseLink($b)) === 0);
+ }
+
+
+ /**
+ * Ensures the provided URI has its query string punctuation in order.
+ *
+ * @param string $uri
+ * @return string
*/
- public static function escape($str)
+ public static function ensureQueryParameter($uri)
{
- $buffer = htmlspecialchars($str, ENT_QUOTES, "UTF-8");
- $buffer = trim($buffer);
+ if (strpos($uri, '?') === false && ($pos = strpos($uri, '&')) !== false) {
+ $uri = substr($uri, 0, $pos) . '?' . substr($uri, $pos + 1);
+ }
- return $buffer;
+ return $uri;
}
+
/**
- * undo an escape
- * @param string $s xml escaped text
- * @return string unescaped text
+ * Check if the trimmed provided string is starting with one of the provided characters
+ *
+ * @param string $string
+ * @param array $chars
+ * @return bool
*/
- public static function unescape($s)
+ public static function startsWith($string, array $chars)
{
- $ret = htmlspecialchars_decode($s, ENT_QUOTES);
- return $ret;
+ $return = in_array(substr(trim($string), 0, 1), $chars);
+
+ return $return;
}
/**
- * apply escape() to all values of array $val, recursively
- * @param array $val
- * @return array
+ * Returns the regular expression string to match URLs in a given text
+ *
+ * @return string
+ * @see https://daringfireball.net/2010/07/improved_regex_for_matching_urls
*/
- public static function arrayEscape($val)
+ public static function autoLinkRegEx()
{
- if (is_bool($val)) {
- return $val?"true":"false";
- } elseif (is_array($val)) {
- return array_map('XML::arrayEscape', $val);
- }
- return self::escape((string) $val);
+ return '@(?xi)
+(?<![=\'\]"/]) # Not preceded by [, =, \', ], ", /
+\b
+( # Capture 1: entire matched URL
+ https?:// # http or https protocol
+ (?:
+ [^/\s`!()\[\]{};:\'",<>?«»“”‘’.] # Domain can\'t start with a .
+ [^/\s`!()\[\]{};:\'",<>?«»“”‘’]+ # Domain can\'t end with a .
+ \.
+ [^/\s`!()\[\]{};:\'".,<>?«»“”‘’]+/? # Followed by a slash
+ )
+ (?: # One or more:
+ [^\s()<>]+ # Run of non-space, non-()<>
+ | # or
+ \(([^\s()<>]+|(\([^\s()<>]+\)))*\) # balanced parens, up to 2 levels
+ | # or
+ [^\s`!()\[\]{};:\'".,<>?«»“”‘’] # not a space or one of these punct chars
+ )*
+)@';
}
}
projects / friendica.git / blobdiff