Revert "*: providers and sources -> channels, PolicyModel to PolicyBindingModel that uses custom M2M through"

This reverts commit 7ed3ceb960.

passbook/providers/oauth/models.py

@@ -0,0 +1,43 @@
+"""Oauth2 provider product extension"""
+
+from typing import Optional
+
+from django.http import HttpRequest
+from django.shortcuts import reverse
+from django.utils.translation import gettext as _
+from oauth2_provider.models import AbstractApplication
+
+from passbook.core.models import Provider
+from passbook.lib.utils.template import render_to_string
+
+
+class OAuth2Provider(Provider, AbstractApplication):
+    """Associate an OAuth2 Application with a Product"""
+
+    form = "passbook.providers.oauth.forms.OAuth2ProviderForm"
+
+    def __str__(self):
+        return f"OAuth2 Provider {self.name}"
+
+    def html_setup_urls(self, request: HttpRequest) -> Optional[str]:
+        """return template and context modal with URLs for authorize, token, openid-config, etc"""
+        return render_to_string(
+            "oauth2_provider/setup_url_modal.html",
+            {
+                "provider": self,
+                "authorize_url": request.build_absolute_uri(
+                    reverse("passbook_providers_oauth:oauth2-authorize")
+                ),
+                "token_url": request.build_absolute_uri(
+                    reverse("passbook_providers_oauth:token")
+                ),
+                "userinfo_url": request.build_absolute_uri(
+                    reverse("passbook_api:openid")
+                ),
+            },
+        )
+
+    class Meta:
+
+        verbose_name = _("OAuth2 Provider")
+        verbose_name_plural = _("OAuth2 Providers")