erp5_oauth_[google|facebook]_login: Normalize get*Connector so we can use on login page

  This is helpfull to display or not the buttons on login page

bt5/erp5_oauth_facebook_login/ExtensionTemplateItem/portal_components/extension.erp5.FacebookLoginUtility.py

@@ -9,11 +9,8 @@ def _getFacebookClientIdAndSecretKey(portal, reference="default"):
 
   Internal function.
   """
-  result_list = unrestrictedSearchFacebookConnector(portal, reference=reference)
-  assert result_list, "Facebook Connector not found"
-  if len(result_list) == 2:
-    raise ValueError("Impossible to select one Facebook Connector")
-  facebook_connector = result_list[0]
+  facebook_connector = unrestrictedSearchFacebookConnector(portal, reference=reference)
+  assert facebook_connector, "Facebook Connector not found"
   return facebook_connector.getClientId(), facebook_connector.getSecretKey()
 
 def redirectToFacebookLoginPage(self, came_from=None):
@@ -34,11 +31,18 @@ def getAccessTokenFromCode(self, code, redirect_uri):
     app_id=client_id, app_secret=secret_key)
 
 def unrestrictedSearchFacebookConnector(self, reference="default"):
-  return self.getPortalObject().portal_catalog.unrestrictedSearchResults(
+  result_list = self.getPortalObject().portal_catalog.unrestrictedSearchResults(
             portal_type="Facebook Connector",
             reference=reference,
             validation_state="validated",
             limit=2)
+  if not result_list:
+    return
+
+  if len(result_list) != 1:
+    raise ValueError('Impossible to select Facebook Connector')
+
+  return result_list[0].getObject()
 
 def unrestrictedSearchFacebookLogin(self, login, REQUEST=None):
   if REQUEST is not None:

bt5/erp5_oauth_facebook_login/SkinTemplateItem/portal_skins/erp5_oauth_facebook_login/ERP5Site_getFacebookConnector.xml → bt5/erp5_oauth_facebook_login/SkinTemplateItem/portal_skins/erp5_oauth_facebook_login/ERP5Site_getDefaultFacebookConnector.xml

@@ -16,7 +16,7 @@
         </item>
         <item>
             <key> <string>id</string> </key>
-            <value> <string>ERP5Site_getFacebookConnector</string> </value>
+            <value> <string>ERP5Site_getDefaultFacebookConnector</string> </value>
         </item>
         <item>
             <key> <string>title</string> </key>

bt5/erp5_oauth_google_login/SkinTemplateItem/portal_skins/erp5_oauth_google_login/ERP5Site_getDefaultGoogleConnector.py

@@ -4,6 +4,9 @@ result_list = portal.portal_catalog(
   reference=reference,
   validation_state="validated",
   limit=2)
+if not result_list:
+  return
+
 if len(result_list) != 1:
   raise ValueError("Impossible to select one Google Connector")
 return result_list[0].getObject()

product/ERP5/bootstrap/erp5_core/SkinTemplateItem/portal_skins/erp5_core/ERP5Site_getAvailableOAuthLoginList.py

@@ -3,13 +3,13 @@ oauth_login_list = []
 portal_skin = context.getPortalObject().portal_skins
 
 if getattr(portal_skin, "erp5_oauth_google_login", None) is not None:
-  connector = context.ERP5Site_getGoogleConnector()
-  if connector and connector[0].getClientId() is not None:
+  connector = context.ERP5Site_getDefaultGoogleConnector()
+  if connector is not None and connector.getClientId() is not None:
     oauth_login_list.append("google")
 
 if getattr(portal_skin, "erp5_oauth_facebook_login", None) is not None:
-  connector = context.ERP5Site_getFacebookConnector()
-  if connector and connector[0].getClientId() is not None:
+  connector = context.ERP5Site_getDefaultFacebookConnector()
+  if connector is not None and connector.getClientId() is not None:
     oauth_login_list.append("facebook")
 
 if getattr(portal_skin, "erp5_openid_connect_client", None) is not None: