Fix moin-nonexistent class in itemlinks starting with '+'

[UlrichB22]

Related to #1699.

It is hard to solve the problem with class non-existent. I added a hack in lines 205f of converters/link.py to show a possible solution for view '+meta', for example. IMO adding a dictionary with view_names and endpoint-function-names seems to be too complex.

Any ideas on how to improve this? Need help.

[RogerHaase]

Agree this is the best way to fix the problem.

If constants/misc.py remains as:

VALID_ITEMLINK_VIEWS = ["+meta", "+history", "+download", "+highlight"]

maybe add a comment that +delete, +convert etc. will show as non-existent links,
else just add them all.

[RogerHaase]

Agree this is the best way to fix the problem.

If constants/misc.py remains as:

VALID_ITEMLINK_VIEWS = ["+meta", "+history", "+download", "+highlight"]

maybe add a comment that +delete, +convert etc. will show as non-existent links,
else just add them all.

[UlrichB22]

Fixes #1699.

In create_app a function has been added that retrieves the relationship between view name and endpoint to avoid a manually maintained dictionary with redundant data. I hope this is OK.