Group / Collate / Aggregate notifications

[tomlawesome]

⚠️ Please verify that this feature request has NOT been suggested before.

• I checked and didn't find similar feature request

🏷️ Feature Request Type

New Notification

🔖 Feature description

For someone using Uptime Kuma to monitor plenty of items (~50) Uptime Kuma can spam notification emails when there is internet connectivity/networking problems.

I usually get 50 when it's down, and 50 again when it comes back up.

✔️ Solution

Allow Uptime Kuma to list ALL services that down, or ALL services that are up and then send them in a single email as a list after a configurable timeout.

❓ Alternatives

Some other kind of notification, filtering emails.
Different email inbox.

I would rather not do any of these because I will not notice them as quickly as an email to my personal mail. I also don't like these options as they (for email) create a lot of storage need for no reason.

📝 Additional Context

No response

[Furrypaw]

Would be nice to have some hierarchy so if the main host goes down / internet then only the main notification is sent instead of all the services that are being monitored.

[DusterTheFirst]

I can see this being made possible by allowing users to group monitors together. If one monitor of a group starts alerting, the other monitors will block the notification for the whole group until they update their status. This will let users group together related failures and it can help reduce the spam notifications received from an outage of related monitors.

[CommanderStorm]

@tomlawesome
I have removed the alert filtering from your issue as I think tracking this in a distinct issue like #1233 is a better call

[alkcbs]

To pull my thoughts from 4829 here, I'd love to see nested items within a group being able to have individual notifications off, while notifications for the group is on, and if something goes down, the group notification would specify what went down rather than just saying "child inaccessible." This would be for situations such as:

-Location (group)
--Server1 (child)
--Server2 (child)
--Firewall (child)

If one server goes down, one notification at the Location level, saying which server is down. If the firewall goes down (taking the servers with it), one notification at the Location level, listing all 3 children as down. As it sits, these would generate 2 and 4 emails for the scenarios if all alerts are enabled.

[zwimer]

Small note in case someone implements this, some services (like Telegram) have character limits, so grouped notifications may have to be split into parts at that limit to avoid being truncated or anything like that.