✏️ [ FEAT REQ ] Auto-reply capabilities

[summersab]

Is your feature request related to a problem? If so, please describe the problem.
There are a lot of good reasons to set up auto-replies. Two that come to mind:

• Temporarily let people know you're not available
• Tell people to contact you on another platform

Describe the feature you'd like
My interest is the second use case. Personally, I'm a Signal user, and I've managed to convince the majority of my contacts to switch. One way I did this was to modify another FOSS SMS app so that it would send an auto-reply to people in my contact list telling them to reach me over there.

However, there are a few considerations when adding a blanket auto-reply functionality:

• Contacts only vs all messages (maybe allow limiting to full phone numbers, excluding/including area codes, regex etc).
• Allow excluding specific contacts
  • Some of my friends are too stubborn to switch to Signal, and my auto-reply just annoys them
  • I have professional clients in my contact list who occasionally text me with SMS, and I would like to exclude them
• Add a timer to prevent the auto-reply from sending too frequently (only send once every XX minutes, only send after you have replied and XX minutes have elapsed, etc)

[octoshrimpy]

usecases:

• driving -> when connected to specific bluetooth device
• sleeping hours -> set on schedule
• focus mode -> countdown timer
• known contact
• seen number previously (if in sms db but not saved as contact)
• specific whitelist / blacklist
• regex -> specific country / area codes, any number ending in 6, any number shorter than 6 digits, etc

would definitely need to be a robust system.