[Bug]: Better handle network errors

[mgallien]

⚠️ Before submitting, please verify the following: ⚠️

• This is a bug, not a question or a configuration issue.
• This issue is not already reported on Github (I've searched it).
• Nextcloud Server and Desktop Client are up to date. See Server Maintenance and Release Schedule and Desktop Releases for supported versions.
• I agree to follow Nextcloud's Code of Conduct

Bug description

Network errors are currently showing as a big blocker error.
Even errors reported by Qt api as temp network errors will block sync and be reported as an error to the user with a big scary red icon.

Steps to reproduce

1. Trigger sync
2. Have a network disconnection (especially temporary one)
3. See big scary errors pop up
4. See sync starting again and finishing successfully when network connection is working again without user intervention

Expected behavior

We could do two things:

• Wait until the same network error happen 3 times each occurrence separated by a minute before telling it to the user
• Checks if Qt is really able to reliably detect that network is up or down and silence network errors if network is down (no need to tell it to the user given the operating system workspace is probably also showing it as a notification)

Which files are affected by this bug

n/a

Operating system

Mac OS

Which version of the operating system you are running.

macOS 13.0

Package

Other

Nextcloud Server version

24.0.4

Nextcloud Desktop Client version

3.5.82

Is this bug present after an update or on a fresh install?

Fresh desktop client install

Are you using the Nextcloud Server Encryption module?

Encryption is Disabled

Are you using an external user-backend?

• Default internal user-backend
• LDAP/ Active Directory
• SSO - SAML
• Other

Nextcloud Server logs

No response

Additional info

No response