feat(Item): added creation methods for expense and income items

Author: ca20110820

projects/Expense-Tracker/item.py

@@ -41,6 +41,22 @@ def create(cls, name: str, amount: float, description: str, date_str: str, categ
         date = datetime.strptime(date_str, "%Y-%m-%d")  # Parse the date string into a datetime object
         return cls(item_id=item_id, name=name, amount=amount, description=description, date=date, category=category)
 
+    @classmethod
+    def create_expense_item(cls, name: str, amount: float, description: str, date_str: str,
+                            category: Optional[Category] = None):
+        if amount >= 0:
+            raise ValueError('Expense Item cannot be positive.')
+
+        return cls.create(name, amount, description, date_str, category=category)
+
+    @classmethod
+    def create_income_item(cls, name: str, amount: float, description: str, date_str: str,
+                           category: Optional[Category] = None):
+        if amount <= 0:
+            raise ValueError('Income Item cannot be negative.')
+
+        return cls.create(name, amount, description, date_str, category=category)
+
     @classmethod
     def from_json_str(cls, json_str):
         data_dict = json.loads(json_str)