add daily activity digest option

[icewind1991]

• Per user option to enable digest mails
• Digest includes up to 20 activity items from the last day
• If more then 20 activity items exist for the last day, "and %n more" will be added to the mail.
• Email format based on the notification mails:

[rullzer]

@jancborchardt should we also here filter out your own actions?

[nickvergessen]

This can be achieved already via https://docs.nextcloud.com/server/16/admin_manual/configuration_server/activity_configuration.html#better-scheduling-of-activity-emails

But yeah then it affects all users, but we have less duplicate code?

[rullzer]

This can be achieved already via https://docs.nextcloud.com/server/16/admin_manual/configuration_server/activity_configuration.html#better-scheduling-of-activity-emails

But yeah then it affects all users, but we have less duplicate code?

Always good!

[jancborchardt]

@jancborchardt should we also here filter out your own actions?

Yes – any kind of notification should always filter out anything you do yourself.

(The "Activity" list doesn’t notify, so it’s fine to show your own actions there.)

[jancborchardt]

See comments for wording and structure improvements.

Is it possible to get avatars and file previews here instead of only the updated/created/deleted icons? That would be much much nicer.

[icewind1991]

Is it possible to get avatars and file previews here instead of only the updated/created/deleted icons?

that's would be a fair amount of work to properly handle authentication of the preview urls, I'll look into it in a follow up PR if there is enough time.

[rullzer]

As discussed lets do this!