News portlet only search for "News item" portal type

[keul]

The news portlet performs a search on basic Plone news using "News Item" portal type:

plone.app.portlets/plone/app/portlets/portlets/news.py

Line 86 in 3f700e1

return catalog(portal_type='News Item',

I'm wondering if we can use the INewsItem interface here. My usecase is a custom add-on that added a new "News" that extends the INewsItem.
If this lead to side effects I think we can add type selection here (with a default to "News Item").

[davilima6]

+1 but I'd suggest type selection widget to be displayed only when there are more than one enabled content types providing INewsItem, so that users don't see useless UI.

[keul]

@davilima6 would be nice. I'm wondering if will simple to know which content types implements an interface.

[davilima6]

Something like this should work:

from plone.dexterity.utils import resolveDottedName
news_types = [type.id for type in api.portal.get_tool(name='portal_types').values() if hasattr(type, 'klass') and INewsItem.implementedBy(resolveDottedName(type.klass))]