package_dependencies

This module represents an express.js server which gets as an input npm module name and returns its list of dependencies

• Module has been written in ES6, compiled with the help of babel
• Module has been written in eslint linting

first intall package via: npm install

later in order to run this package, enter command: npm run

After running server will run on port 5000 You will be able to run following APIs:

• Get dependecies: GET http://localhost:5000/dependencies?package=express Second run will retrieve dependecies from cache -> after 100seconds cache will get invalidated

• Get dependecies for specific version: http://localhost:5000/dependencies?package=express&&version=4.17.1 Second run will retrieve dependecies from cache -> after 100seconds cache will get invalidated

Error Handling

• GET http://localhost:5000/dependencies -> no package given -> ERROR 404 will get respond
• GET http://localhost:5000/dependencies?package=express&&version=4.17.2 -> package with specific version doesn't exist -> ERROR 404 will get respond
• GET http://localhost:5000/dependencies?package=nonExistingPackage -> package doesn't exist on npm -> ERROR 404 will get response

to run tests run: npm test

You should see this:

• √ respond Not-Found error when getting non-existing package (38ms)
• √ respond Bad Request when not getting package
• √ respond dependencies for latest version
• √ cache dependencies for latest version

Assumptions

• Caching TTL (Time-to-live) configured 'hard-coded' to be 100 seconds
• Following the above, we assume package's dependencies won't change within 100 seconds
• npm service is online

Future work

• CI/CD
• Configurable file to enable config TTL, package's dependencies 3rd party (e.g. Yarn) etc.
• Authorization middleware to enable service only for authorized user
• Login service
• Configure GitHub repo to work with PRs and not push directly to master