Message Parser Service

Simple TypeScript project for Message Parser.

Overview

• Parses structured message input
• Validates required segments and fields
• Returns normalized JSON output
• Includes unit tests with Vitest

Project Structure

src/
  parser/
  validators/
  types/
  errors/
tests/

Scripts

npm install
npm test
npm run typecheck

Input Format

• Segments are separated by new lines
• Segment fields are separated by |
• Field components are separated by ^

Output

parseMessage(input: string): ParsedMessage

Example

Example input and output can be added here.

Notes

• No database
• Focused on parser logic and validation
• Small, maintainable module layout

What I would do if I've more time

1. Framework

• I would setup a framework, maybe Express or Nest.js(mostly Express due to it's flexibility)
• I would more structure the error handling to be fair with maybe something like Error categories or whatever make sense
• I would implement some runtime validation tools like Zod to catch any type mismatch
• Maybe also would like to cover logging, configuration to limit input size to guard the server and CI