feat: implement custom slug generation with fallback and length limitation

Author: cklei-carly

docs/configuration.md

@@ -503,6 +503,13 @@ Control how InspireCMS handles frontend requests:
      * Override with a custom class to implement specialized preview behavior
      */
     'preview_provider' => \SolutionForest\InspireCms\Content\DefaultPreviewProvider::class,
+
+    /**
+     * Controls how URL slugs are generated for content
+     *
+     * Override to implement custom slug generation rules
+     */
+    'slug_generator' => \SolutionForest\InspireCms\Content\DefaultSlugGenerator::class,
 ],
 ```
 

src/Content/DefaultSlugGenerator.php

@@ -8,6 +8,76 @@ class DefaultSlugGenerator implements SlugGeneratorInterface
 {
     public function generate($text) 
     {
-        return Str::slug($text);
+        // return Str::slug($text);
+        
+        $maxLength = 50;
+        
+        // Method 1: Try ICU transliterator (best option)
+        if (function_exists('transliterator_transliterate')) {
+            $slug = self::useTransliterator($text);
+            if ($slug && strlen($slug) > 0) {
+                return self::limitLength($slug, $maxLength);
+            }
+        }
+        
+        // Method 2: Try iconv transliteration
+        $slug = self::useIconv($text);
+        if ($slug && strlen($slug) > 0) {
+            return self::limitLength($slug, $maxLength);
+        }
+        
+        // Method 3: Fallback to meaningful slug
+        return self::fallbackSlug($text);
+    }
+    
+    private static function useTransliterator($text) {
+        try {
+            $transliterated = transliterator_transliterate(
+                'Han-Latin; Latin-ASCII; Lower()', 
+                $text
+            );
+            return self::cleanSlug($transliterated);
+        } catch (Exception $e) {
+            return false;
+        }
+    }
+    
+    private static function useIconv($text) {
+        $transliterated = iconv('UTF-8', 'ASCII//TRANSLIT//IGNORE', $text);
+        if ($transliterated === false) {
+            return false;
+        }
+        return self::cleanSlug($transliterated);
+    }
+    
+    private static function cleanSlug($text) {
+        $slug = strtolower($text);
+        $slug = preg_replace('/[^a-z0-9\s-]/', '', $slug);
+        $slug = preg_replace('/[\s-]+/', '-', $slug);
+        $slug = trim($slug, '-');
+        return $slug;
+    }
+    
+    private static function fallbackSlug($text) {
+        // Create a meaningful fallback
+        $hash = substr(md5($text), 0, 8);
+        $timestamp = date('Ymd');
+        return "article-{$timestamp}-{$hash}";
+    }
+    
+    private static function limitLength($slug, $maxLength) {
+        if (strlen($slug) <= $maxLength) {
+            return $slug;
+        }
+        
+        // Cut at word boundary
+        $slug = substr($slug, 0, $maxLength);
+        $lastDash = strrpos($slug, '-');
+        
+        if ($lastDash !== false && $lastDash > $maxLength * 0.7) {
+            $slug = substr($slug, 0, $lastDash);
+        }
+        
+        return rtrim($slug, '-');
     }
 }