Typescript Capstone Project Solution

[fpopendyk-wq]

TypeScript Capstone Re-factor

• TS Migration: Converted the custom Observer/Observable implementation and mock setup from JS to TypeScript.
• Type Safety: Added generics (<T>) to Observable and Observer to ensure end-to-end stream data safety.
• Interfaces & Types: Defined structural contracts for ObserverHandlers, Subscription, CustomRequest, and User.
• Enums: Replaced global string/number constants with HttpMethods and HttpStatusCodes enums.
• Encapsulation: Used private modifiers on class properties to enforce proper data hiding.
• Functional Parity: Retained identical runtime execution behavior and teardown logic.