fix: slug name

app/Http/Controllers/MusicPlaylistController.php

@@ -59,7 +59,7 @@ public function store(Request $request)
         ], 422);
     }
 
-    $data['slug'] = Str::slug($data['name']);
+    $data['slug'] = $this->uniqueSlug($data['name']);
 
     // An uploaded image file takes precedence over a provided image_id.
     $data['image_id'] = $this->uploadedImageId($request) ?? ($data['image_id'] ?? null);
@@ -138,7 +138,7 @@ public function update(Request $request, $id)
         ]);
 
         if (isset($data['name'])) {
-            $data['slug'] = Str::slug($data['name']);
+            $data['slug'] = $this->uniqueSlug($data['name'], $playlist->id);
         }
 
         // An uploaded image file takes precedence over a provided image_id.
@@ -165,6 +165,29 @@ public function update(Request $request, $id)
         ]);
     }
     
+    // Build a slug that is unique within music_playlists. Persian names often
+    // transliterate to the same/empty value, so we fall back and add a counter.
+    private function uniqueSlug(string $name, ?int $ignoreId = null): string
+    {
+        $base = Str::slug($name);
+        if ($base === '') {
+            $base = 'playlist';
+        }
+
+        $slug = $base;
+        $i = 2;
+        while (
+            MusicPlaylist::where('slug', $slug)
+                ->when($ignoreId, fn ($q) => $q->where('id', '!=', $ignoreId))
+                ->exists()
+        ) {
+            $slug = "{$base}-{$i}";
+            $i++;
+        }
+
+        return $slug;
+    }
+
     public function destroy($id)
     {
         $playlist = MusicPlaylist::findOrFail($id);