Sending notifications

[Jamesllllllllll]

• Need to be able to schedule a serverless function to run at a regular increment (monthly, weekly, etc).
• When it runs, if any links are broken it will trigger an email notification (trying Sendgrid and Postmark).

[Jamesllllllllll]

I set up a CRON job to check a mocked up data set and send emails based on the results.

I need to work on error handling, they currently cause the link checker to bail out and not send an email.

[Jamesllllllllll]

So CRON jobs will only actually run in full "production" - meaning none of the development deployments (good thing, as it could potentially run & send multiple emails).

Currently the CRON job is set to run hourly for a single username and email me. I will monitor today to see if it's working!

[Jamesllllllllll]

I have a CRON job that runs /api/weeklyCron set up to take an array of users from the db and in turn calls /api/checkWeekly for each user.

There was an issue with weeklyCron not being detected as a serverless function by Vercel. One line of code was required on that endpoint to force Vercel to do so:

export const dynamic = 'force-dynamic'

The checkWeekly function is a single function that combines /api/checkBeacons and loops through each link calling /api/checkHeaders - and finally sends an email through SendGrid when it's complete if there are any warnings or errors for the links.

Next steps:

• After authentication & user registration is implemented, allow users to set one username to be checked bi-weekly for free
• Once premium is implemented, allow users to upgrade to check more frequently (daily?)