Business subscriptions

[joemasilotti]

Clicking Message on a developer profile currently navigates to developers/:id/messages/new. Instead, if the user doesn't have an active Business Subscription then they should be redirected to a Stripe Checkout page. If the user isn't signed in then redirect to users/sign_up. If the user doesn't have a business profile then they should be redirected to businesses/new.

The redirects should remember which developer the business wants to message. This can be done with Devise's #stored_location_for. All of this logic can live in ColdMessagesController for now as a user progresses through the steps.

The Stripe Checkout page should offer a single annual subscription for $99 per month. Upon successful charge, Stripe should redirect via success_url back to the remembered URL (messaging the developer).

Also, a webhook should be caught to create the Customer record with Stripe's identifier and the subscription status. The webhook should also listen for changed and failed events to ensure the database is kept up to date with active subscription records in Stripe.

https://stripe.com/docs/billing/subscriptions/build-subscription?ui=checkout

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Open source considerations

• Should we expect contributors to install the Stripe CLI?
• If so, can I share my test Stripe secret key?
• If not, we will need:
  • Instructions for setting up a Stripe account
  • To ignore the encrypted development credentials and instructions for how to add individual Stripe keys to a new file
  • Instructions for setting up Stripe locally (Stripe CLI)
  • Instructions (or a script) for adding the price to the Stripe account and adding the price ID to credentials

[joemasilotti]

Closed via #168.