the "active cta" should be global state and not isolated to the header button

[joelhooks]

In the header we have this switch statement that uses a small set of factors to determine what CTA the user is currently being shown:

https://github.com/eggheadio/egghead-next/blob/4455fb77e91fb1aeea0e70e8f07af7fe00c0ecdc/src/components/app/header/index.tsx#L48-L73

This is extremely rudimentary and trapped inside the header. If it was global and took into consideration data from egghead, convertkit, customerio, and maybe a small local storage database (for anon users that would sync) we would be able to address the "CTA machine" and be able to more clearly answer the question

"what should we show the learner right now?"

this is an essential question in the context of the site.

• what to show when a learner has read an article?
• what to show after a learner finishes a talk?
• what to show after a learner has watched a lesson video?
• what to show when a learner finishes a podcast?
• what to show when a learner finishes a course?
• what to show when a learner leaves a review?
• what to show when a learner answers a quiz question?
• what to show when a learner answers a survey?

In customer.io we have the idea of "scores" for particular technologies and these can be very handy for this.

context is critical!

This is related to some discussions I had with @ParkerGits about the "sorting hat" which is closer to what we are looking for in a global "CTA Plinko"