Adapters instead of switch-case: how we broke down an Angular form into 40 fields

Dmitry Chepaykin, a senior Angular developer at T-Bank, shares his experience refactoring a complex form within a data labeling platform. Initially, the order editing service contained over 700 lines of code, where the logic for processing dozens of fields was implemented using cumbersome switch-case structures, making maintenance and scaling difficult. The team decided to apply the Adapter pattern, separating each form field into its own class with a unified interface. This allowed for the encapsulation of data conversion, validation, and comparison logic. The article details the challenges encountered during implementation, the architectural advantages of the approach, and the final optimization results. Switching to adapters made the code more modular, readable, and easier to extend, which is crucial for complex enterprise solutions. The author also provides practical tips for implementing this pattern in Angular applications.