+<?php declare(strict_types=1);
+
+/*
+ * This file is part of the Rapsys PackBundle package.
+ *
+ * (c) Raphaël Gertz <symfony@rapsys.eu>
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace Rapsys\PackBundle\Util;
+
+/**
+ * Helps manage string conversions
+ */
+class SluggerUtil {
+ //The secret parameter
+ private $secret;
+
+ //The alpha array
+ private $alpha;
+
+ //The rev array
+ private $rev;
+
+ //The alpha array key number
+ private $count;
+
+ //The offset reduced from secret
+ private $offset;
+
+ /**
+ * Creates a new slugger util
+ *
+ * @todo Add a command to generate alpha array or generate it on first run with cache storage ?
+ * @todo Use Cache like in calendar controller through FilesystemAdapter
+ *
+ * @param string $secret The secret string
+ */
+ public function __construct(string $secret) {
+ //Set secret
+ $this->secret = $secret;
+
+ //Pseudo-random alphabet
+ //XXX: use array flip and keys to workaround php "smart" that cast range('0', '9') as int instead of string
+ //XXX: The key count mismatch, count(alpha)>count(rev), resulted in a data corruption due to duplicate numeric values
+ $this->alpha = array_keys(array_flip(array_merge(
+ range('^', '[', -1),
+ range('V', 'Z'),
+ range('9', '7', -1),
+ range('L', 'O'),
+ range('f', 'a', -1),
+ range('_', '`'),
+ range('3', '0', -1),
+ range('E', 'H'),
+ range('v', 'r', -1),
+ range('+', '/'),
+ range('K', 'I', -1),
+ range('g', 'j'),
+ range('=', ':', -1),
+ range('>', '@'),
+ range('m', 'k', -1),
+ range('4', '6'),
+ range('*', '%', -1),
+ range('n', 'q'),
+ range('U', 'P', -1),
+ range(' ', '$'),
+ range('D', 'A', -1),
+ range('w', 'z'),
+ range('~', '!', -1)
+ )));
+
+ //Init rev array
+ $this->count = count($rev = $this->rev = array_flip($this->alpha));
+
+ //Init split
+ $split = str_split($this->secret);
+
+ //Set offset
+ $this->offset = array_reduce($split, function ($res, $a) use ($rev) { return $res += $rev[$a]; }, count($split)) % $this->count;
+ }
+
+ /**
+ * Flatten recursively an array
+ *
+ * @param array $data The data tree
+ * @param string|null $current The current prefix
+ * @param string $sep The key separator
+ * @param string $prefix The key prefix
+ * @param string $suffix The key suffix
+ * @return array The flattened data
+ */
+ public function flatten(array $data, mixed $current = null, string $sep = '.', string $prefix = '', string $suffix = ''): array {
+ //Init result
+ $ret = [];
+
+ //Look for data array
+ if (is_array($data)) {
+ //Iteare on each pair
+ foreach($data as $k => $v) {
+ //Merge flattened value in return array
+ $ret += $this->flatten($v, empty($current) ? $k : $current.$sep.$k, $sep, $prefix, $suffix);
+ }
+ //Look flat data
+ } else {
+ //Store data in flattened key
+ $ret[$prefix.$current.$suffix] = $data;
+ }
+
+ //Return result
+ return $ret;
+ }
+
+ /**
+ * Crypt and base64uri encode string
+ *
+ * @param string $data The data string
+ * @return string The hashed data
+ */
+ public function hash(string $data): string {
+ //Return hashed data
+ //XXX: we use hash_hmac with md5 hash
+ //XXX: crypt was dropped because it provided identical signature for string starting with same pattern
+ return str_replace(['+','/'], ['-','_'], base64_encode(hash_hmac('md5', $data, $this->secret, true)));
+ }
+
+ /**
+ * Serialize then short
+ *
+ * @param array $data The data array
+ * @return string The serialized and shorted data
+ */
+ public function serialize(array $data): string {
+ //Return shorted serialized data
+ return $this->short(serialize($data));
+ }
+
+ /**
+ * Short
+ *
+ * @param string $data The data string
+ * @return string The shorted data
+ */
+ public function short(string $data): string {
+ //Return string
+ $ret = '';
+
+ //Iterate on each character
+ foreach(str_split($data) as $k => $c) {
+ if (isset($this->rev[$c]) && isset($this->alpha[($this->rev[$c]+$this->offset)%$this->count])) {
+ //XXX: Remap char to an other one
+ $ret .= chr(($this->rev[$c] - $this->offset + $this->count) % $this->count);
+ }
+ }
+
+ //Send result
+ return str_replace(['+','/'], ['-','_'], base64_encode($ret));
+ }
+
+ /**
+ * Convert string to safe slug
+ *
+ * @param string $data The data string
+ * @return string The slugged data
+ */
+ function slug(string $data): string {
+ //Use Transliterator if available
+ if (class_exists('Transliterator')) {
+ //Convert from any to latin, then to ascii and lowercase
+ $trans = \Transliterator::create('Any-Latin; Latin-ASCII; Lower()');
+ //Replace every non alphanumeric character by dash then trim dash
+ return trim(preg_replace('/[^a-zA-Z0-9]+/', '-', $trans->transliterate($data)), '-');
+ }
+ //Convert from utf-8 to ascii, replace quotes with space, remove non alphanumericseparator, replace separator with dash and trim dash
+ return trim(preg_replace('/[\/_|+ -]+/', '-', strtolower(preg_replace('/[^a-zA-Z0-9\/_|+ -]/', '', str_replace(['\'', '"'], ' ', iconv('UTF-8', 'ASCII//TRANSLIT', $data))))), '-');
+ }
+
+ /**
+ * Unshort then unserialize
+ *
+ * @param string $data The data string
+ * @return array The unshorted and unserialized data
+ */
+ public function unserialize(string $data): array {
+ //Return unshorted unserialized string
+ return unserialize($this->unshort($data));
+ }
+
+ /**
+ * Unshort
+ *
+ * @param string $data The data string
+ * @return string The unshorted data
+ */
+ public function unshort(string $data): string {
+ //Return string
+ $ret = '';
+
+ //Iterate on each character
+ foreach(str_split(base64_decode(str_replace(['-','_'], ['+','/'], $data))) as $c) {
+ //XXX: Reverse map char to an other one
+ $ret .= $this->alpha[(ord($c) + $this->offset) % $this->count];
+ }
+
+ //Send result
+ return $ret;
+ }
+}
Rapsys Git / packbundle / commitdiff