Cursor rule

1---
2description: 
3globs: [*]
4alwaysApply: true
5---
6always print # Design Patterns in the Project
7 
8# Design Patterns in the Project
9 
10## SOLID Principles
11- **S**ingle Responsibility: Each class should have a single responsibility.
12- **O**pen/Closed: Classes should be open for extension, closed for modification.
13- **L**iskov Substitution: Subclasses must be interchangeable with their base classes.
14- **I**nterface Segregation: Avoid interfaces with unnecessary methods.
15- **D**ependency Inversion: Dependencies should be based on abstractions.
16 
17## Use of Design Patterns
18- **Service Objects**: To encapsulate business logic in separate classes.
19- **Repository Pattern**: To handle data access.
20- **Factory Pattern**: For creating complex objects.
21- **Command Pattern**: For operations that need to be reversible.
22 
23## Example of a Service Object
24```ruby
25class ProcessPaymentService
26  def initialize(user, order)
27    @user = user
28    @order = order
29  end
30 
31  def call
32    process_payment
33    notify_user
34  end
35 
36  private
37 
38  def process_payment
39    PaymentGateway.charge(@user, @order.total_price)
40  end
41 
42  def notify_user
43    NotificationService.send_email(@user, "Payment processed successfully.")
44  end
45end
46```
47```
48 
49```