fix: studio registration using the LMS SSO (#30855)

* fix: studio registration using the LMS SSO

Add the social-core settings:
```
INACTIVE_USER_LOGIN = True
INACTIVE_USER_URL = 'http://localhost:18010'
```

Change the registration link's `next` parameter to trigger SSO login
after the registration.

cms/djangoapps/contentstore/tests/tests.py

@@ -6,6 +6,7 @@ This test file will test registration, login, activation, and session activity t
 import datetime
 import time
 from unittest import mock
+from urllib.parse import quote_plus
 
 from ddt import data, ddt, unpack
 from django.conf import settings
@@ -174,10 +175,11 @@ class AuthTestCase(ContentStoreTestCase):
         with mock.patch.dict(settings.FEATURES, {"ALLOW_PUBLIC_ACCOUNT_CREATION": allow_account_creation}):
             response = self.client.get(reverse('homepage'))
             assertion_method = getattr(self, assertion_method_name)
+            login_url = quote_plus(f"http://testserver{settings.LOGIN_URL}")
             assertion_method(
                 response,
-                '<a class="action action-signup" href="{}/register?next=http%3A%2F%2Ftestserver%2F">Sign Up</a>'.format
-                (settings.LMS_ROOT_URL)
+                f'<a class="action action-signup" href="{settings.LMS_ROOT_URL}/register'
+                f'?next={login_url}">Sign Up</a>'
             )
             self.assertContains(
                 response,

cms/envs/common.py

@@ -2686,3 +2686,12 @@ COURSE_LIVE_HELP_URL = "https://edx.readthedocs.io/projects/edx-partner-course-s
 COURSE_LIVE_GLOBAL_CREDENTIALS = {}
 
 PERSONALIZED_RECOMMENDATION_COOKIE_NAME = 'edx-user-personalized-recommendation'
+
+######################## Registration ########################
+
+# Social-core setting that allows inactive users to be able to
+# log in. The only case it's used is when user registering a new account through the LMS.
+INACTIVE_USER_LOGIN = True
+
+# Redirect URL for inactive user. If not set, user will be redirected to /login after the login itself (loop)
+INACTIVE_USER_URL = f'http://{CMS_BASE}'

cms/envs/production.py

@@ -648,3 +648,5 @@ COURSE_LIVE_GLOBAL_CREDENTIALS["BIG_BLUE_BUTTON"] = {
     "SECRET": ENV_TOKENS.get('BIG_BLUE_BUTTON_GLOBAL_SECRET', None),
     "URL": ENV_TOKENS.get('BIG_BLUE_BUTTON_GLOBAL_URL', None),
 }
+
+INACTIVE_USER_URL = f'http{"s" if HTTPS == "on" else ""}://{CMS_BASE}'

cms/templates/howitworks.html

@@ -5,6 +5,7 @@
 <%!
   from django.conf import settings
   from django.utils.translation import gettext as _
+  from urllib.parse import quote_plus
   from openedx.core.djangolib.markup import HTML, Text
 %>
 
@@ -162,7 +163,7 @@
 
     <ul class="list-actions">
       <li class="action-item">
-        <a href="${settings.FRONTEND_REGISTER_URL}?next=${current_url}" class="action action-primary">${_("Sign Up & Start Making Your {platform_name} Course").format(platform_name=settings.PLATFORM_NAME)}</a>
+        <a href="${settings.FRONTEND_REGISTER_URL}?next=${quote_plus(request.build_absolute_uri(settings.LOGIN_URL))}" class="action action-primary">${_("Sign Up & Start Making Your {platform_name} Course").format(platform_name=settings.PLATFORM_NAME)}</a>
       </li>
       <li class="action-item">
         <a href="${settings.LOGIN_URL}?next=${current_url}" class="action action-secondary">${_("Already have a {studio_name} Account? Sign In").format(studio_name=settings.STUDIO_SHORT_NAME)}</a>

cms/templates/widgets/header.html

@@ -6,6 +6,7 @@
   from django.conf import settings
   from django.urls import reverse
   from django.utils.translation import gettext as _
+  from urllib.parse import quote_plus
   from cms.djangoapps.contentstore import toggles
   from cms.djangoapps.contentstore.utils import get_pages_and_resources_url
   from openedx.core.djangoapps.discussions.config.waffle import ENABLE_PAGES_AND_RESOURCES_MICROFRONTEND
@@ -266,7 +267,7 @@
           </li>
           % if static.get_value('ALLOW_PUBLIC_ACCOUNT_CREATION', settings.FEATURES.get('ALLOW_PUBLIC_ACCOUNT_CREATION')):
               <li class="nav-item nav-not-signedin-signup">
-                <a class="action action-signup" href="${settings.FRONTEND_REGISTER_URL}?next=${current_url}">${_("Sign Up")}</a>
+                <a class="action action-signup" href="${settings.FRONTEND_REGISTER_URL}?next=${quote_plus(request.build_absolute_uri(settings.LOGIN_URL))}">${_("Sign Up")}</a>
               </li>
           % endif
           <li class="nav-item nav-not-signedin-signin">