Extract slug generator to separate method

src/Knp/DoctrineBehaviors/Model/Sluggable/Sluggable.php

@@ -93,11 +93,29 @@ public function generateSlug()
             }
 
             // generate the slug itself
-            $sluggableText = implode($usableValues, ' ');
-            $urlized = strtolower( trim( preg_replace("/[^a-zA-Z0-9\/_|+ -]/", '', iconv('UTF-8', 'ASCII//TRANSLIT', $sluggableText) ), $this->getSlugDelimiter() ) );
-            $urlized = preg_replace("/[\/_|+ -]+/", $this->getSlugDelimiter(), $urlized);
+            $transliterator = $this->getTransliterator();
 
-            $this->slug = $urlized;
+            if (!is_callable($transliterator)) {
+                throw new \RuntimeException("Sluggable::getTransliterator() method must return callable.");
+            }
+
+            $this->slug = call_user_func($transliterator, implode($usableValues, ' '));
         }
     }
+
+    /**
+     * This method should return any php callable which can create slug from given string.
+     * Feel free to override this any way you want.
+     *
+     * @return callable
+     */
+    protected function getTransliterator()
+    {
+        return function($string) {
+            $string = transliterator_transliterate("Any-Latin; NFD; [:Nonspacing Mark:] Remove; NFC; [:Punctuation:] Remove; Lower();", $string);
+            $string = preg_replace('/[-\s]+/', '-', $string);
+
+            return trim($string, '-');
+        };
+    }
 }

src/Knp/DoctrineBehaviors/Model/Sluggable/Utils.php

@@ -0,0 +1,32 @@
+<?php
+
+namespace Knp\DoctrineBehaviors\Model\Sluggable;
+
+/**
+  * This class contains function which transliterates string in russian using traditional russian way of transliterating instead of ISO transliteration rules.
+ *
+ * @package Knplabs\DoctrineBehaviors\Model\Sluggable
+ * @author Alex Panshin <deadyaga@gmail.com>
+ */
+class Utils
+{
+    private static $ru_alphabet = array( 'а','б','в','г','д','е','ё','ж','з','и','й','к','л','м','н','о','п','р','с','т','у','ф','х','ц','ч','ш','щ','ъ','ы','ь','э','ю','я');
+    private static $translit_alphabet = array('a','b','v','g','d','e','yo','zh', 'z', 'i', 'j', 'k', 'l', 'm', 'n', 'o', 'p', 'r', 's', 't', 'u','f', 'h', 'ts', 'ch', 'sh', 'sch', '', 'y', 'j', 'e', 'yu', 'ya');
+
+    /**
+     * This method prepares string to be an url's part
+     * @param string $string
+     * @return string
+     */
+    public static function transliterateRussian($string)
+    {
+        $string = function_exists('mb_strtolower') ? mb_strtolower($string, 'UTF-8') : strtolower($string);
+
+        $string = str_replace(self::$ru_alphabet, self::$translit_alphabet, $string);
+
+        $string = transliterator_transliterate("Any-Latin; NFD; [:Nonspacing Mark:] Remove; NFC; [:Punctuation:] Remove;", $string);
+        $string = preg_replace('/[-\s]+/', '-', $string);
+
+        return trim($string, '-');
+    }
+} 

tests/Knp/DoctrineBehaviors/ORM/SluggableTest.php

@@ -97,4 +97,40 @@ public function testUpdatedSlug()
 
         $this->assertEquals($entity->getSlug(), $expected);
     }
+
+    /**
+     * @test
+     */
+    public function shouldTransliterateSlug()
+    {
+        $em = $this->getEntityManager();
+        $entity = new \BehaviorFixtures\ORM\SluggableEntity();
+
+        $expected = 'privet';
+
+        $entity->setName('Привет!');
+
+        $em->persist($entity);
+        $em->flush();
+
+        $this->assertEquals($expected, $entity->getSlug());
+    }
+
+    /**
+     * @test
+     */
+    public function shouldTransliterateSlugInRussian()
+    {
+        $em = $this->getEntityManager();
+        $entity = new \BehaviorFixtures\ORM\RussianSluggableEntity();
+
+        $expected = 'ya-budu-zhdatj-tebya';
+
+        $entity->setName('Я буду ждать тебя!');
+
+        $em->persist($entity);
+        $em->flush();
+
+        $this->assertEquals($expected, $entity->getSlug());
+    }
 }

tests/fixtures/BehaviorFixtures/ORM/RussianSluggableEntity.php

@@ -0,0 +1,18 @@
+<?php
+
+namespace BehaviorFixtures\ORM;
+
+use Doctrine\ORM\Mapping as ORM;
+use Knp\DoctrineBehaviors\Model;
+
+/**
+ * @ORM\Entity
+ * @ORM\Table(name="SluggableEntity")
+ */
+class RussianSluggableEntity extends SluggableEntity
+{
+    protected function getTransliterator()
+    {
+        return ['\Knp\DoctrineBehaviors\Model\Sluggable\Utils', 'transliterateRussian'];
+    }
+} 

tests/fixtures/BehaviorFixtures/ORM/SluggableEntity.php

@@ -68,7 +68,7 @@ public function setDate($date)
         return $this;
     }
 
-    protected function getSluggableFields()
+    public function getSluggableFields()
     {
         return [ 'name' ];
     }