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Raphaël G. Git Repositories - packbundle/blob - Util/SluggerUtil.php
1 <?php
declare(strict_types
=1);
4 * This file is part of the Rapsys PackBundle package.
6 * (c) Raphaël Gertz <symfony@rapsys.eu>
8 * For the full copyright and license information, please view the LICENSE
9 * file that was distributed with this source code.
12 namespace Rapsys\PackBundle\Util
;
15 * Helps manage string conversions
18 //The secret parameter
27 //The alpha array key number
30 //The offset reduced from secret
34 * Creates a new slugger util
36 * @todo Add a command to generate alpha array or generate it on first run with cache storage ?
37 * @todo Use Cache like in calendar controller through FilesystemAdapter
39 * @param string $secret The secret string
41 public function __construct(string $secret) {
43 $this->secret
= $secret;
45 //Pseudo-random alphabet
46 //XXX: use array flip and keys to workaround php "smart" that cast range('0', '9') as int instead of string
47 //XXX: The key count mismatch, count(alpha)>count(rev), resulted in a data corruption due to duplicate numeric values
48 $this->alpha
= array_keys(array_flip(array_merge(
75 $this->count = count($rev = $this->rev = array_flip($this->alpha));
78 $split = str_split($this->secret);
81 $this->offset = array_reduce($split, function ($res, $a) use ($rev) { return $res += $rev[$a]; }, count($split)) % $this->count;
85 * Flatten recursively an array
87 * @param array|string $data The data tree
88 * @param string|null $current The current prefix
89 * @param string $sep The key separator
90 * @param string $prefix The key prefix
91 * @param string $suffix The key suffix
92 * @return array The flattened data
94 public function flatten($data, ?string $current = null, string $sep = '.', string $prefix = '', string $suffix = ''): array {
99 if (is_array($data)) {
100 //Iteare on each pair
101 foreach($data as $k => $v) {
102 //Merge flattened value in return array
103 $ret += $this->flatten($v, empty($current) ? $k : $current.$sep.$k, $sep, $prefix, $suffix);
107 //Store data in flattened key
108 $ret[$prefix.$current.$suffix] = $data;
116 * Crypt and base64uri encode string
118 * @param string $data The data string
119 * @return string The hashed data
121 public function hash(string $data): string {
123 //XXX: we use hash_hmac with md5 hash
124 //XXX: crypt was dropped because it provided identical signature for string starting with same pattern
125 return str_replace(['+
','/'], ['-','_
'], base64_encode(hash_hmac('md5
', $data, $this->secret, true)));
129 * Serialize then short
131 * @param array $data The data array
132 * @return string The serialized and shorted data
134 public function serialize(array $data): string {
135 //Return shorted serialized data
136 return $this->short(serialize($data));
142 * @param string $data The data string
143 * @return string The shorted data
145 public function short(string $data): string {
149 //Iterate on each character
150 foreach(str_split($data) as $k => $c) {
151 if (isset($this->rev[$c]) && isset($this->alpha[($this->rev[$c]+$this->offset)%$this->count])) {
152 //XXX: Remap char to an other one
153 $ret .= chr(($this->rev[$c] - $this->offset + $this->count) % $this->count);
158 return str_replace(['+
','/'], ['-','_
'], base64_encode($ret));
162 * Convert string to safe slug
164 * @param string $data The data string
165 * @return string The slugged data
167 function slug(string $data): string {
168 //Use Transliterator if available
169 if (class_exists('Transliterator
')) {
170 //Convert from any to latin, then to ascii and lowercase
171 $trans = \Transliterator::create('Any
-Latin
; Latin
-ASCII
; Lower()');
172 //Replace every non alphanumeric character by dash then trim dash
173 return trim(preg_replace('/[^a
-zA
-Z0
-9]+
/', '-', $trans->transliterate($data)), '-');
175 //Convert from utf-8 to ascii, replace quotes with space, remove non alphanumericseparator, replace separator with dash and trim dash
176 return trim(preg_replace('/[\
/_
|+ -]+
/', '-', strtolower(preg_replace('/[^a
-zA
-Z0
-9\
/_
|+ -]/', '', str_replace(['\'
', '"'], ' ', iconv('UTF-8', 'ASCII//TRANSLIT', $data))))), '-');
180 * Unshort then unserialize
182 * @param string $data The data string
183 * @return array The unshorted and unserialized data
185 public function unserialize(string $data): array {
186 //Return unshorted unserialized string
187 return unserialize($this->unshort($data));
193 * @param string $data The data string
194 * @return string The unshorted data
196 public function unshort(string $data): string {
200 //Iterate on each character
201 foreach(str_split(base64_decode(str_replace(['-','_'], ['+','/'], $data))) as $c) {
202 //XXX: Reverse map char to an other one
203 $ret .= $this->alpha[(ord($c) + $this->offset) % $this->count];