We just found out that there is a bug in production that our e-mail function was iterating errantly and sending duplicate e-mails to many users. We need to fix this quickly but we don't want to send out a mass apology letter to all of our users.
Our sysadmin gave us the SMTP logs and we need to process the logs and identify which users received multiple e-mails so that we can directly send them a follow up e-mail explaining the situation and offer super cool swag to keep them on as customers.
Also, the boss wants this done ASAP, we don't have time to do this manually...HAAALLLLPPP!
Create a function that takes in the data from the log file, "email_log.json" that has a list of all the email addresses that emails were sent to, and create a report of all of the unique e-mails and the number of times an e-mail was sent to each address.
The result returned from the module pattern should be an object where each key is the email address, and the value should be the number of times we've sent an email to that address.
We're not sure when we'll get out a hotfix for the errant code so this may happen again. Can you write this in a way that we can do this on our own so we don't have to bother you every time this happens?
Thaaaaanks :D