update method to accept either token as string or Token class instance

[hernandev]

This PR allows for verifyIdToken method on Auth class to accept both a string or a Token instance.

Fixes #152

[jeromegamez]

Are you sure? The used Verifier (https://github.com/kreait/firebase-tokens-php/blob/master/src/Verifier.php#L41) parses an ID token string already, and I couldn't recreate the issue.

Just to be sure, I added unit and integration tests with b3bd435.

But indeed, you made me aware of something: values that couldn't be parsed as a token at all (such as integer, bools, null) would trigger an unexpected error, but I believe that I was able to fix it with and f370001.

Could you please rebase your branch and check if this still doesn't work for you? I hope that my second change fixed the real culprit.

You can execute the unit test suite with make tests or vendor/bin/phpunit --testsuite unit.

[hernandev]

Could be some caching, I'll get back to you.

[hernandev]

This is the error:

TypeError: Argument 1 passed to Kreait\Firebase\Exception\Auth\InvalidIdToken::__construct() must be an instance of Lcobucci\JWT\Token, string given, called in /var/www/app/vendor/kreait/firebase-php/src/Firebase/Auth/IdTokenVerifier.php on line 33

[hernandev]

Ok, you got the line, after a exception is raised, the string is being passed to the Exception instance, which does not know how to handle strings.

That's why this PR fixed it, but by the wrong way since it will be trying to parse it on two places.

I would recommend you to parse as soon as possible on the flow to avoid a "is it already parsed" question everywhere.

So, gonna close this, you can solve with the best approach!

See ya!