If the User Function Style template is cut or deleted, use the Fail Safe template instead. Fixes bug #11729

docs/changelog/7.x.x.txt

@@ -1,5 +1,6 @@
 7.9.10
  - fixed #11721: spamStopWords not in WebGUI.conf.original
+ - fixed #11729: Trash your User Function Style, and WebGUI locks you out
 
 7.9.9
  - fixed #11693: Shopping cart does not show for visitor user

lib/WebGUI/Asset/Template.pm

@@ -47,6 +47,24 @@ These methods are available from this class:
 
 #-------------------------------------------------------------------
 
+=head2 cut ( )
+
+Extend the base method to handle cutting the User Function Style template and destroying your site.
+If the current template is the User Function Style template with the Fail Safe template.
+
+=cut
+
+sub cut {
+    my ( $self )    = @_;
+    my $returnValue = $self->SUPER::cut();
+    if ($returnValue && $self->getId eq $self->session->setting->get('userFunctionStyleId')) {
+        $self->session->setting->set('userFunctionStyleId', 'PBtmpl0000000000000060');
+    }
+    return $returnValue;
+}
+
+#-------------------------------------------------------------------
+
 =head2 definition ( session, definition )
 
 Defines the properties of this asset.
@@ -658,6 +676,24 @@ sub processRaw {
 
 #-------------------------------------------------------------------
 
+=head2 purge ( )
+
+Extend the base method to handle purging the User Function Style template and destroying your site.
+If the current template is the User Function Style template with the Fail Safe template.
+
+=cut
+
+sub purge {
+	my $self = shift;
+    my $returnValue = $self->SUPER::purge;
+    if ($returnValue && $self->getId eq $self->session->setting->get('userFunctionStyleId')) {
+        $self->session->setting->set('userFunctionStyleId', 'PBtmpl0000000000000060');
+    }
+	return $returnValue;
+}
+
+#-------------------------------------------------------------------
+
 =head2 update
 
 Override update from Asset.pm to handle backwards compatibility with the old

t/Asset/Template.t

@@ -16,7 +16,7 @@ use WebGUI::Test;
 use WebGUI::Session;
 use WebGUI::Asset::Template;
 use Exception::Class;
-use Test::More tests => 44; # increment this value for each test you create
+use Test::More tests => 48; # increment this value for each test you create
 use Test::Deep;
 use Data::Dumper;
 use JSON qw{ from_json };
@@ -183,3 +183,35 @@ WebGUI::Test->restoreLogging;
 
 WebGUI::Test->addToCleanup(WebGUI::VersionTag->getWorking($session));
 
+my $userStyleTemplate = $importNode->addChild({
+    className => "WebGUI::Asset::Template",
+    title     => "user function style",
+    url       => "ufs",
+    template  => "user function style",
+    namespace => 'WebGUI Test Template',
+});
+
+my $someOtherTemplate = $importNode->addChild({
+    className => "WebGUI::Asset::Template",
+    title     => "some other template",
+    url       => "sot",
+    template  => "some other template",
+    namespace => 'WebGUI Test Template',
+});
+
+$session->setting->set('userFunctionStyleId', $userStyleTemplate->getId);
+
+my $purgeCutTag = WebGUI::VersionTag->getWorking($session);
+WebGUI::Test->addToCleanup($purgeCutTag);
+
+is($session->setting->get('userFunctionStyleId'), $userStyleTemplate->getId, 'Setup for cut tests.');
+
+$userStyleTemplate->cut;
+is($session->setting->get('userFunctionStyleId'), 'PBtmpl0000000000000060', 'cut resets the user function style template to Fail Safe');
+
+$userStyleTemplate->publish;
+$session->setting->set('userFunctionStyleId', $userStyleTemplate->getId);
+is($session->setting->get('userFunctionStyleId'), $userStyleTemplate->getId, 'Reset for purge test');
+
+$userStyleTemplate->purge;
+is($session->setting->get('userFunctionStyleId'), 'PBtmpl0000000000000060', 'purge resets the user function style template to Fail Safe');