Magic Link

This repo shows how to install magic link authentication in an existing Lamdera app. It is still a work-in-progress.

The app is at https://elm-magic-test.lamdera.app/, It was built by applying rules from jxxcarlson/elm-review-codeinstaller to a bare-bones Lamdera counter app. This package is joint work with Matteus Leite. The review rules that install authentication are in review/src/ReviewConfig.elm. They rely on code and ideas from Martin Stewart, Ambue, and Mario Rogic:

vendor/elm-email and vendor/magic-link(Martin and Ambue)
vendor/lamdera-auth(Mario)

If you go to the app, you should be able to sign up, sign in, and have at it. The administrator page is only visible to the the adminstrator. At the moment, that is me. I will make the administrator role configuable.

The code is here, at https://github.com/jxxcarlson/counter-review-test.

The bare-bones counter app is in counter-original-src/
The review rule is in review/src/ReviewConfig.elm
The result of applying the review rule to the bare-bones code is in src

You can use the Makefile to manage things:

Make install: install magic-link authentication on a copy the bare-bones app.
Make uninstall: the inverse of the previous step
Use 'lamdera live` to see the results

If you run make install, you will get an elm-review error message. So far, for me, this is a false positive. Somethng to be fixed. Also, I recommend running make install with lamdera live in the off position.

You will have to manage the Postmark secret youself to make this work. See src/Config.elm for details.

I'm not happy about the number of rules that are applied. Ninety-two! (This is the atomic number of uranium, not a good sign). I would like to reduce the surface area of the auth package.

Part of the reason for the large surface area is that the auth code includes not just authentication, but the batteries needed to make it operational: seeding with atmospheric random numbers (the real deal, never fake), registration of users, a page to sign in and sign up, and an admin page so the administrator can see the user data.

More work to do, but I am getting there. Once I am a bit more happy about the code, I will ask you to look at it so I as to make it better.