feat: add save feature

app/Traits/HasSaves.php

@@ -0,0 +1,59 @@
+<?php
+// app/Traits/HasSaves.php
+namespace App\Traits;
+
+use App\Models\SavedItem;
+use Illuminate\Database\Eloquent\Relations\MorphMany;
+
+trait HasSaves
+{
+    public function saves()
+    {
+        return $this->morphMany(SavedItem::class, 'saveable');
+    }
+    
+    public function getIsSavedAttribute()
+    {
+        if (!auth()->check()) return false;
+        
+        return $this->saves()
+            ->where('user_id', auth()->id())
+            ->exists();
+    }
+    
+    public function getSavedCountAttribute()
+    {
+        return $this->saves()->count();
+    }
+    
+    public function toggleSaveStatus()
+    {
+        if ($this->getIsSavedAttribute()) {
+            return $this->removeSave();
+        } else {
+            return $this->addSave();
+        }
+    }
+    
+    public function addSave()
+    {
+        if ($this->getIsSavedAttribute()) return false;
+        
+        return SavedItem::create([
+            'user_id' => auth()->id(),
+            'saveable_id' => $this->id,
+            'saveable_type' => get_class($this),
+        ]);
+    }
+    
+    public function removeSave()
+    {
+        if (!$this->getIsSavedAttribute()) return false;
+        
+        return SavedItem::where([
+            'user_id' => auth()->id(),
+            'saveable_id' => $this->id,
+            'saveable_type' => get_class($this),
+        ])->delete();
+    }
+}