fix(session): Update last_seen when user session is validated

[solracsf]

Summary

While doing some maintenance on my instance, I've saw a lot of users with last_seen timestamp a few months ago, like 7 months ago or even more than a year. So, I've disabled them.

A couple of minutes later, some of them were complaining their user account was disabled 😿

Example:

# occ user:info USER
  - user_id: USER
  - display_name: USER
  - email: [email protected]
  - cloud_id: [email protected]
  - enabled: true
  - groups:
    - Users
  - quota: 10 GB
  - storage:
    - free: 10737418240
    - used: 0
    - total: 10737418240
    - relative: 0
    - quota: 10737418240
  - last_seen: 2024-08-12T17:19:46+00:00
  - user_directory: /var/www/data/USER
  - backend: Database

As you can see, last_seen states user was last seen (wrongly) 6 months ago.
Yet, on the webserver log, we can see that this same user performed some operations only minutes ago:

cat /var/log/nginx/*.log | grep -F 'USER'

"[15/Feb/2025:11:08:49 +0100]" my.instance.com PROPFIND /remote.php/dav/calendars/USER/personal_shared_by_another/ 207 0.077 0.062 "DAVx5/4.3.12.1-ose (2023/12/27; dav4jvm; okhttp/4.12.0) Android/12"
"[15/Feb/2025:11:39:14 +0100]" my.instance.com PROPFIND /remote.php/dav/calendars/USER/personal/ 207 0.324 0.309 "DAVx5/4.3.12.1-ose (2023/12/27; dav4jvm; okhttp/4.12.0) Android/12"

Problem is that those users NEVER use the WebUI, they only use some apps to sync their data, like Calendar or Contacts sync, etc. So, they never complete a full logout + full login.

My proposal here is to update the last_seen timestamp also when we validate their session, since that, in my opinion, as an instance administrator, I want to be able to rely on the last_seen field to really know when the user was last seen (and by last seen, I mean user has done some kind of legit activity on the instance, while being a valid user). As per actual logic, it would be updated, at most, once every 60s.

IMO, this is actually a bug (not a feature) because updating last_seen field only on full logout + login is not reliable.

Please review.

Checklist

• Code is properly formatted
• Sign-off message is added to all commits
• Tests (unit, integration, api and/or acceptance) are included
• Screenshots before/after for front-end changes
• Documentation (manuals or wiki) has been updated or is not required
• Backports requested where applicable (ex: critical bugfixes)

[solracsf]

I've put this change as-is into production 2 days ago (v30). Now I can see that users listed as seen by the system as "months ago", are in fact active, and are now listed as last seen "minutes or hours ago". This is what I expect to be reported.

[come-nc]

How often is that executed?
It turns last login into last activity, no?

I understand the issue though, for webdav each request is a login, no?

[solracsf]

How often is that executed?

As per actual logic, it would be updated, at most, once every 60s.