gutendex processing implementation

app/Models/Book.php

@@ -14,8 +14,23 @@ class Book extends Model
         'publication_date',
         'description',
         'category_id',
+        'gutenberg_id',
+        'source',
+        'full_text_url',
+        'language',
     ];
 
+    /**
+     * Get the attributes that should be cast.
+     */
+    protected function casts(): array
+    {
+        return [
+            'publication_date' => 'date',
+            'gutenberg_id' => 'integer',
+        ];
+    }
+
     /**
      * Use slug for route model binding and URL generation.
      */
@@ -24,6 +39,38 @@ class Book extends Model
         return 'slug';
     }
 
+    /**
+     * Scope a query to only include books from a specific source.
+     */
+    public function scopeFromSource($query, string $source)
+    {
+        return $query->where('source', $source);
+    }
+
+    /**
+     * Scope a query to only include manually added books.
+     */
+    public function scopeManual($query)
+    {
+        return $query->where('source', 'manual');
+    }
+
+    /**
+     * Scope a query to only include Gutendex imported books.
+     */
+    public function scopeGutendex($query)
+    {
+        return $query->where('source', 'gutendex');
+    }
+
+    /**
+     * Scope a query to only include books in a specific language.
+     */
+    public function scopeInLanguage($query, string $language)
+    {
+        return $query->where('language', $language);
+    }
+
     /**
      * Get the category that owns the book.
      */