Raphaël G. Git Repositories - userbundle/blob - Utils/Slugger.php

   1 <?php
   2
   3 namespace Rapsys\UserBundle\Utils;
   4
   5 class Slugger {
   6         //The secret parameter
   7         private $secret;
   8
   9         //The offset reduced from secret
  10         private $offset;
  11
  12         //Retrieve secret and set offset from reduction
  13         public function __construct(\Symfony\Component\DependencyInjection\ContainerInterface $container) {
  14                 //Set secret
  15                 $this->secret = $container->getParameter('secret');
  16
  17                 //Init rev array
  18                 $rev = array_flip(array_merge(range('0', '9'), range('a', 'z'), range('A', 'Z'), range('!', '~')));
  19
  20                 //Set offset
  21                 $this->offset = array_reduce(str_split($this->secret), function ($res, $a) use ($rev) { return $res += $rev[$a]; }, count($this->secret)) % count($rev);
  22         }
  23
  24         //Short the string
  25         public function short($string) {
  26                 //Return string
  27                 $ret = '';
  28
  29                 //Alphabet
  30                 $alpha = array_merge(range('0', '9'), range('a', 'z'), range('A', 'Z'), range('!', '~'));
  31
  32                 //Reverse alphabet
  33                 $rev = array_flip($alpha);
  34
  35                 //Number characters
  36                 $count = count($alpha);
  37
  38                 //Iterate on each character
  39                 foreach(str_split($string) as $c) {
  40                         if (isset($rev[$c]) && isset($alpha[($rev[$c]+$this->offset)%$count])) {
  41                                 $ret .= $alpha[($rev[$c]+$this->offset)%$count];
  42                         }
  43                 }
  44
  45                 //Send result
  46                 return str_replace(array('+','/'), array('-','_'), base64_encode($ret));
  47         }
  48
  49         //Unshort the string
  50         public function unshort($string) {
  51                 //Return string
  52                 $ret = '';
  53
  54                 //Alphabet
  55                 $alpha = array_merge(range('0', '9'), range('a', 'z'), range('A', 'Z'), range('!', '~'));
  56
  57                 //Reverse alphabet
  58                 $rev = array_flip($alpha);
  59
  60                 //Number characters
  61                 $count = count($alpha);
  62
  63                 //Iterate on each character
  64                 foreach(str_split(base64_decode(str_replace(array('-','_'), array('+','/'), $string))) as $c) {
  65                         if (isset($rev[$c]) && isset($alpha[($rev[$c]-$this->offset+$count)%$count])) {
  66                                 $ret .= $alpha[($rev[$c]-$this->offset+$count)%$count];
  67                         }
  68                 }
  69
  70                 //Send result
  71                 return $ret;
  72         }
  73
  74         //Crypt and base64uri encode string
  75         public function hash($string) {
  76                 return str_replace(array('+','/'), array('-','_'), base64_encode(crypt($string, $this->secret)));
  77         }
  78
  79         //Convert string to safe slug
  80         function slug($string) {
  81                 return preg_replace('/[\/_|+ -]+/', '-', strtolower(trim(preg_replace('/[^a-zA-Z0-9\/_|+ -]/', '', str_replace(array('\'', '"'), ' ', iconv('UTF-8', 'ASCII//TRANSLIT', $string))), '-')));
  82         }
  83
  84 }