INTERLIS Export - subclass_check

[sjib]

Describe the bug
When exporting data with INTERLIS and the _subclass_check throws and error, the export process is not stopped anymore and the ERROR only shows up in the depth of the tww protocol:

2024-07-26T10:29:03 teksi_wastewater.utils:ERROR: number of subclass elements of structure_part NOT CORRECT in schema tww_od: checksum = 1 (positive number means missing entries, negative means too many subclass entries)

To Reproduce
Exact steps to reproduce the behavior:

1. Create additional data entry in superclass e.g. structure_part (that has no reference subclass entry)
   

2. Click on 'INTERLIS export'

3. Select export file and start export

4. See valid export message

5. Check for ERROR: number of subclass elements of in protocol tab 'tww'

6. Find entry

Expected behavior
A clear and concise description of what you expected to happen.

When subclass_check throws an error, the export process should be canceled and a red error message should appear message bar.

Desktop (please complete the following information):

• TWW version pre-release 2024.0
• QGIS Version 3.34.8
• OS windows 10

Additional context
Add any other context about the problem here.

[sjib]

ilivalidator does not find this error and skips the export of this extra dataset (ch080qwzEE001233) - but the user will not be aware of this because he/she gets a success message.

[sjib]

Adapt error handlinge here in _check_subclass_count:

wastewater/plugin/teksi_wastewater/interlis/interlis_importer_exporter.py

Line 557 in cebe618

logger.error(

[sjib]

@cymed Any quick idea how to improve this? How can we exit the export process in tww?

This is how it is implemented in qgep:
https://github.com/QGEP/qgepqwat2ili/blob/48c8a7fe15f55a26c8ba0c65eb43eee23573cb55/qgepqwat2ili/gui/__init__.py#L424