feat(2-2): add example

Author: rgomezcasas

02-demeter_tell_dont_ask/2-tell_dont_ask/example.py

@@ -1,16 +1,51 @@
 from user import User
+from product import Product
 
 def bad_example():
     user = User(1, "Javier", "Ferrer")
 
-    full_name = f"{user.full_name.name.value} {user.full_name.last_name.value}"
-    print(f"User ID: {user.id.value}, Full Name: {full_name}")
+    product1 = Product(101, "Smartphone", 799.99)
+    product2 = Product(102, "Headphones", 149.99)
+
+    if product1 not in user.saved_products:
+        user.saved_products.append(product1)
+
+    if product2 not in user.saved_products:
+        user.saved_products.append(product2)
+
+    if not user.saved_products:
+        saved_products_text = "No saved products"
+    else:
+        saved_products_text = f"{user.full_name.name.value} {user.full_name.last_name.value}'s saved products:\n"
+        for saved_product in user.saved_products:
+            product_id = saved_product.id.value
+            product_name = saved_product.name.value
+            product_price = saved_product.price.value
+            saved_products_text += f"- Product ID: {product_id}, Name: {product_name}, Price: ${product_price:.2f}\n"
+
+    print(saved_products_text)
+
+    user.saved_products.remove(product1)
+
+    remaining_products = len(user.saved_products)
+    print(f"Remaining saved products after removal: {remaining_products}")
 
 
 def good_example():
     user = User(1, "Javier", "Ferrer")
 
-    print(user.display_information())
+    product1 = Product(101, "Smartphone", 799.99)
+    product2 = Product(102, "Headphones", 149.99)
+
+    user.add_to_saved_products(product1)
+    user.add_to_saved_products(product2)
+
+    print(user.display_saved_products())
+
+    user.remove_from_saved_products(product1)
+
+    print("After removing a product:")
+    print(user.display_saved_products())
 
 
 if __name__ == "__main__":

02-demeter_tell_dont_ask/2-tell_dont_ask/product.py

@@ -0,0 +1,12 @@
+from product_id import ProductId
+from product_name import ProductName
+from product_price import ProductPrice
+
+class Product:
+    def __init__(self, product_id, name, price):
+        self.id = ProductId(product_id)
+        self.name = ProductName(name)
+        self.price = ProductPrice(price)
+    
+    def display_information(self):
+        return f"Product ID: {self.id}, Name: {self.name}, Price: {self.price}" 

02-demeter_tell_dont_ask/2-tell_dont_ask/product_id.py

@@ -0,0 +1,6 @@
+class ProductId:
+    def __init__(self, value):
+        self.value = value
+        
+    def __str__(self):
+        return str(self.value) 

02-demeter_tell_dont_ask/2-tell_dont_ask/product_name.py

@@ -0,0 +1,6 @@
+class ProductName:
+    def __init__(self, value):
+        self.value = value
+        
+    def __str__(self):
+        return self.value 

02-demeter_tell_dont_ask/2-tell_dont_ask/product_price.py

@@ -0,0 +1,6 @@
+class ProductPrice:
+    def __init__(self, value):
+        self.value = value
+        
+    def __str__(self):
+        return f"${self.value:.2f}" 

02-demeter_tell_dont_ask/2-tell_dont_ask/user.py

@@ -10,6 +10,24 @@ def __init__(self, user_id, name, last_name):
             UserName(name),
             UserLastName(last_name)
         )
+        self.saved_products = []
 
     def display_information(self):
-        return f"User ID: {self.id}, Full Name: {self.full_name}" 
+        return f"User ID: {self.id}, Full Name: {self.full_name}" 
+    
+    def add_to_saved_products(self, product):
+        if product not in self.saved_products:
+            self.saved_products.append(product)
+    
+    def remove_from_saved_products(self, product):
+        if product in self.saved_products:
+            self.saved_products.remove(product)
+    
+    def display_saved_products(self):
+        if not self.saved_products:
+            return "No saved products"
+        
+        result = f"{self.full_name}'s saved products:\n"
+        for product in self.saved_products:
+            result += f"- {product.display_information()}\n"
+        return result 

02-demeter_tell_dont_ask/2-tell_dont_ask/user_full_name.py

@@ -8,3 +8,6 @@ def __init__(self, name, last_name):
 
     def formatted(self):
         return f"{self.name} {self.last_name}"
+        
+    def __str__(self):
+        return self.formatted()

02-demeter_tell_dont_ask/2-tell_dont_ask/user_id.py

@@ -1,3 +1,6 @@
 class UserId:
     def __init__(self, value):
         self.value = value
+    
+    def __str__(self):
+        return str(self.value)

02-demeter_tell_dont_ask/2-tell_dont_ask/user_last_name.py

@@ -1,3 +1,6 @@
 class UserLastName:
     def __init__(self, value):
         self.value = value
+    
+    def __str__(self):
+        return self.value

02-demeter_tell_dont_ask/2-tell_dont_ask/user_name.py

@@ -1,3 +1,6 @@
 class UserName:
     def __init__(self, value):
         self.value = value
+    
+    def __str__(self):
+        return self.value