Fix UI on edit auth source page (#14137 An error occurred )

* do not override OAuth URLs with default values when editing an auth source (fixes #12014
  
An error occurred
 
)
* show custom url inputs by default for providers that don't provide an official hosted service

web_src/js/index.js

@@ -1832,17 +1832,19 @@ function initAdmin() {
     }
   }
 
-  function onOAuth2Change() {
+  function onOAuth2Change(applyDefaultValues) {
     $('.open_id_connect_auto_discovery_url, .oauth2_use_custom_url').hide();
     $('.open_id_connect_auto_discovery_url input[required]').removeAttr('required');
 
     const provider = $('#oauth2_provider').val();
     switch (provider) {
-      case 'github':
-      case 'gitlab':
       case 'gitea':
       case 'nextcloud':
       case 'mastodon':
+        $('#oauth2_use_custom_url').attr('checked', 'checked');
+        // fallthrough intentional
+      case 'github':
+      case 'gitlab':
         $('.oauth2_use_custom_url').show();
         break;
       case 'openidConnect':
@@ -1850,19 +1852,21 @@ function initAdmin() {
         $('.open_id_connect_auto_discovery_url').show();
         break;
     }
-    onOAuth2UseCustomURLChange();
+    onOAuth2UseCustomURLChange(applyDefaultValues);
   }
 
-  function onOAuth2UseCustomURLChange() {
+  function onOAuth2UseCustomURLChange(applyDefaultValues) {
     const provider = $('#oauth2_provider').val();
     $('.oauth2_use_custom_url_field').hide();
     $('.oauth2_use_custom_url_field input[required]').removeAttr('required');
 
     if ($('#oauth2_use_custom_url').is(':checked')) {
-      $('#oauth2_token_url').val($(`#${provider}_token_url`).val());
-      $('#oauth2_auth_url').val($(`#${provider}_auth_url`).val());
-      $('#oauth2_profile_url').val($(`#${provider}_profile_url`).val());
-      $('#oauth2_email_url').val($(`#${provider}_email_url`).val());
+      if (applyDefaultValues) {
+        $('#oauth2_token_url').val($(`#${provider}_token_url`).val());
+        $('#oauth2_auth_url').val($(`#${provider}_auth_url`).val());
+        $('#oauth2_profile_url').val($(`#${provider}_profile_url`).val());
+        $('#oauth2_email_url').val($(`#${provider}_email_url`).val());
+      }
 
       switch (provider) {
         case 'github':
@@ -1923,7 +1927,7 @@ function initAdmin() {
         case '6': // OAuth2
           $('.oauth2').show();
           $('.oauth2 div.required:not(.oauth2_use_custom_url,.oauth2_use_custom_url_field,.open_id_connect_auto_discovery_url) input').attr('required', 'required');
-          onOAuth2Change();
+          onOAuth2Change(true);
           break;
         case '7': // SSPI
           $('.sspi').show();
@@ -1941,8 +1945,8 @@ function initAdmin() {
     $('#auth_type').trigger('change');
     $('#security_protocol').on('change', onSecurityProtocolChange);
     $('#use_paged_search').on('change', onUsePagedSearchChange);
-    $('#oauth2_provider').on('change', onOAuth2Change);
-    $('#oauth2_use_custom_url').on('change', onOAuth2UseCustomURLChange);
+    $('#oauth2_provider').on('change', () => onOAuth2Change(true));
+    $('#oauth2_use_custom_url').on('change', () => onOAuth2UseCustomURLChange(true));
     $('#groups_enabled').on('change', onVerifyGroupMembershipChange);
   }
   // Edit authentication
@@ -1956,9 +1960,9 @@ function initAdmin() {
         $('#use_paged_search').on('change', onUsePagedSearchChange);
       }
     } else if (authType === '6') {
-      $('#oauth2_provider').on('change', onOAuth2Change);
-      $('#oauth2_use_custom_url').on('change', onOAuth2UseCustomURLChange);
-      onOAuth2Change();
+      $('#oauth2_provider').on('change', () => onOAuth2Change(true));
+      $('#oauth2_use_custom_url').on('change', () => onOAuth2UseCustomURLChange(false));
+      onOAuth2Change(false);
     }
   }