Prevent double-clicks on SSO login providers (#5842)

src/pretix/presale/templates/pretixpresale/organizers/customer_login.html

@@ -60,7 +60,7 @@
             {% endif %}
 
             {% if providers %}
-                <ul class="list-inline text-center blank-after">
+                <ul id="customer-account-login-providers" class="list-inline text-center blank-after">
                 {% for provider in providers %}
                     <li>
                         <a href="{% eventurl request.organizer "presale:organizer.customer.login" provider=provider.pk %}?{{ request.META.QUERY_STRING }}"

src/pretix/static/pretixpresale/js/ui/main.js

@@ -731,6 +731,11 @@ $(function () {
             $(countInput).trigger("change");
         });
     });
+
+    $("#customer-account-login-providers a").click(function () {
+        // Prevent double-submit, see also https://github.com/pretix/pretix/issues/5836
+        $(this).addClass("disabled");
+    });
 });
 
 function copy_answers(elements, answers) {