Allow to clear flags by trigger

Bugzilla/Bug.pm

@@ -3046,7 +3046,7 @@ sub flags
 {
     my $self = shift;
 
-    # Don't cache it as it must be in sync with ->flag_types.
+    # FIXME (Is it true?) Don't cache it as it must be in sync with ->flag_types.
     $self->{flags} = [ map { @{$_->{flags}} } @{$self->flag_types} ];
     return $self->{flags};
 }

Bugzilla/Checker.pm

@@ -177,7 +177,7 @@ sub except_fields
 # { field_name => value }
 # Change field 'field_name' to 'value'. For multivalued fields field_name may also
 # by 'add_<field_name>' or 'remove_<field_name>', which means add or remove something.
-# FIXME Now the only function supported is 'add_cc'
+# FIXME Now the only functions supported are 'add_cc' and 'clear_flags'
 sub triggers
 {
     my $self = shift;

Bugzilla/CheckerUtils.pm

@@ -249,15 +249,32 @@ sub run_triggers
         my $checker = $bug->{failed_checkers}->[$i];
         if ($checker->triggers)
         {
+            # FIXME Only "add CC" and "clear flag" triggers are supported by now, but it's not that hard to support more
             if ($checker->triggers->{add_cc})
             {
-                # FIXME Only "add CC" trigger is supported by now, but it's not that hard to support more
                 for (split /[\s,]+/, $checker->triggers->{add_cc})
                 {
                     $bug->add_cc($_);
                     $modified = 1;
                 }
             }
+            if ($checker->triggers->{clear_flags})
+            {
+                my %del_flags = map { $_ => 1 } split /[\s,]*,+[\s,]*/, $checker->triggers->{clear_flags};
+                for my $flag (@{$bug->flags})
+                {
+                    if ($del_flags{$flag->name})
+                    {
+                        $bug->make_dirty;
+                        Bugzilla::Flag->set_flag($bug, {
+                            id => $flag->id,
+                            status => 'X',
+                            requestee => $flag->requestee && $flag->requestee->login,
+                        });
+                        $modified = 1;
+                    }
+                }
+            }
         }
         # FIXME Show information about the applied trigger (use result_messages)
         splice @{$bug->{failed_checkers}}, $i, 1;

template/en/default/admin/edit-checkers.html.tmpl

@@ -156,6 +156,10 @@
    <th>Добавить CC:</th>
    <td><input type="text" id="triggers_add_cc" name="triggers_add_cc" value="[% checker.triggers.add_cc | html %]" /></td>
   </tr>
+  <tr>
+   <th>Снять флаги (через ,):</th>
+   <td><input type="text" id="triggers_clear_flags" name="triggers_clear_flags" value="[% checker.triggers.clear_flags | html %]" /></td>
+  </tr>
  </tbody>
  <tbody>
   <tr><td></td><td><input type="submit" value=" Сохранить " /></td></tr>
@@ -204,9 +208,10 @@ function check_trigger()
 {
   var f = document.getElementById('is_trigger').checked;
   var cc = document.getElementById('triggers_add_cc');
+  var fl = document.getElementById('triggers_clear_flags');
   if (!f)
-    cc.value = '';
-  else if (!cc.value)
+    cc.value = fl.value = '';
+  else if (!cc.value && !fl.value)
   {
     alert('Задайте действие триггера!');
     return false;