Show 'claims_supported' in discovery document

[cicnavi]

Find a way to show which claims are supported by OP using 'claims_supported' property in discovery document as per https://openid.net/specs/openid-connect-discovery-1_0.html

[cicnavi]

Keys from 'claim to attribute translate table' from module config file could be used, however, claim names can have type designations at the beginning...

[pradtke]

I think (even without dealing with the type issue) you would need to get the claims from ClaimTranslatorExtractor since ClaimTranslatorExtractorFactory does all the custom scope/claim prefixing when it builds ClaimTranslatorExtractor (though I've never used the claim prefixing feature, so I easily could be wrong)

Then maybe something like this to remove the types

$claims = [];
foreach ($this->translationTable as $claimWithType) {
            list($type, $claim) = $this->getTypeAndClaimName($claimWithType);
            $claims[] = $claim;
}

Overall I agree with your point in #138 that maybe a different syntax for indicating type would make the code and data structures easier.

[cicnavi]

Great, thanks for sharing this option!