Store Blender ID OAuth scopes in MongoDB + request badge scope too

This also changes the way we treat Blender ID tokens. Before, the Blender ID
token was discarded and a random token was generated & stored. Now the
actual Blender ID token is stored.

The Facebook and Google OAuth code still uses the old approach of generating
a new token. Not sure what the added value is, though, because once the
Django session is gone there is nothing left to authenticate the user and
thus the random token is useless anyway.

pillar/auth/oauth.py

@@ -1,8 +1,9 @@
 import abc
-import attr
 import json
 import logging
+import typing
 
+import attr
 from rauth import OAuth2Service
 from flask import current_app, url_for, request, redirect, session, Response
 
@@ -15,6 +16,8 @@ class OAuthUserResponse:
 
     id = attr.ib(validator=attr.validators.instance_of(str))
     email = attr.ib(validator=attr.validators.instance_of(str))
+    access_token = attr.ib(validator=attr.validators.instance_of(str))
+    scopes: typing.List[str] = attr.ib(validator=attr.validators.instance_of(list))
 
 
 class OAuthError(Exception):
@@ -127,6 +130,7 @@ class OAuthSignIn(metaclass=abc.ABCMeta):
 
 class BlenderIdSignIn(OAuthSignIn):
     provider_name = 'blender-id'
+    scopes = ['email', 'badge']
 
     def __init__(self):
         from urllib.parse import urljoin
@@ -145,7 +149,7 @@ class BlenderIdSignIn(OAuthSignIn):
 
     def authorize(self):
         return redirect(self.service.get_authorize_url(
-            scope='email',
+            scope=' '.join(self.scopes),
             response_type='code',
             redirect_uri=self.get_callback_url())
         )
@@ -159,7 +163,11 @@ class BlenderIdSignIn(OAuthSignIn):
 
         session['blender_id_oauth_token'] = access_token
         me = oauth_session.get('user').json()
-        return OAuthUserResponse(str(me['id']), me['email'])
+
+        # Blender ID doesn't tell us which scopes were granted by the user, so
+        # for now assume we got all the scopes we requested.
+        # (see https://github.com/jazzband/django-oauth-toolkit/issues/644)
+        return OAuthUserResponse(str(me['id']), me['email'], access_token, self.scopes)
 
 
 class FacebookSignIn(OAuthSignIn):
@@ -189,7 +197,7 @@ class FacebookSignIn(OAuthSignIn):
         me = oauth_session.get('me?fields=id,email').json()
         # TODO handle case when user chooses not to disclose en email
         # see https://developers.facebook.com/docs/graph-api/reference/user/
-        return OAuthUserResponse(me['id'], me.get('email'))
+        return OAuthUserResponse(me['id'], me.get('email'), '', [])
 
 
 class GoogleSignIn(OAuthSignIn):
@@ -217,4 +225,4 @@ class GoogleSignIn(OAuthSignIn):
         oauth_session = self.make_oauth_session()
 
         me = oauth_session.get('userinfo').json()
-        return OAuthUserResponse(str(me['id']), me['email'])
+        return OAuthUserResponse(str(me['id']), me['email'], '', [])