Fixing a bug on the normalizer configuration

config/tagging.php

@@ -6,7 +6,7 @@
 	'primary_keys_type' => 'integer', // 'string' or 'integer'
 
 	// Value of are passed through this before save of tags
-	'normalizer' => '\Conner\Tagging\Util::slug',
+	'normalizer' => '\Conner\Tagging\TaggingUtility::slug',
 
 	// Display value of tags are passed through (for front end display)
 	'displayer' => '\Illuminate\Support\Str::title',

src/TaggingUtility.php

@@ -2,6 +2,8 @@
 
 namespace Conner\Tagging;
 
+use Illuminate\Support\Str;
+
 /**
  * Utility functions to help with various tagging functionality.
  *
@@ -44,6 +46,11 @@ public static function displayize($string)
     public static function normalize($string)
     {
         $normalizer = config('tagging.normalizer');
+
+        if(is_string($normalizer) && Str::contains($normalizer, 'Conner\Tagging\Util')) {
+            $normalizer = '\Conner\Tagging\TaggingUtility::slug';
+        }
+
         $normalizer = $normalizer ?: self::class.'::slug';
 
         return call_user_func($normalizer, $string);

tests/TaggingUtilityTest.php

@@ -74,6 +74,26 @@ public function test_normalizer()
         $this->assertEquals('aaa', TaggingUtility::normalize('some string'));
     }
 
+    public function test_normalizer_with_old_class()
+    {
+        $this->assertEquals(TaggingUtility::slug('Sugar Free'), TaggingUtility::normalize('Sugar Free'));
+        $this->assertEquals(TaggingUtility::slug('ПЧ�Цщ'), TaggingUtility::normalize('ПЧ�Цщ'));
+        $this->assertEquals(TaggingUtility::slug('quiénsí'), TaggingUtility::normalize('quiénsí'));
+
+        config(['tagging.normalizer' => '\Conner\Tagging\Util::slug']);
+        $this->assertEquals('some-string', TaggingUtility::normalize('some string'));
+    }
+
+    public function test_normalizer_with_new_class()
+    {
+        $this->assertEquals(TaggingUtility::slug('Sugar Free'), TaggingUtility::normalize('Sugar Free'));
+        $this->assertEquals(TaggingUtility::slug('ПЧ�Цщ'), TaggingUtility::normalize('ПЧ�Цщ'));
+        $this->assertEquals(TaggingUtility::slug('quiénsí'), TaggingUtility::normalize('quiénsí'));
+
+        config(['tagging.normalizer' => '\Conner\Tagging\TaggingUtility::slug']);
+        $this->assertEquals('some-string', TaggingUtility::normalize('some string'));
+    }
+
     public function test_displayize()
     {
         $this->assertEquals('Sugar Free', TaggingUtility::displayize('sugar free'));