Fix PHP Fatal error: Uncaught Error: Using $this when not in object (#6959)

plugins/managesieve/lib/Roundcube/rcube_sieve_engine.php

@@ -2237,7 +2237,7 @@ class rcube_sieve_engine
                 'type'  => 'text',
                 'name'  => '_action_interval[' . $id . ']',
                 'id'    => 'action_interval' . $id,
-                'value' => rcube_sieve_vacation::vacation_interval($action),
+                'value' => rcube_sieve_vacation::vacation_interval($action, $this->exts),
                 'size'  => 2,
                 'class' => $this->error_class($id, 'action', 'interval', 'action_interval'),
             ));

plugins/managesieve/lib/Roundcube/rcube_sieve_vacation.php

@@ -125,7 +125,7 @@ class rcube_sieve_vacation extends rcube_sieve_engine
         return $this->sieve->error();
     }
 
-    private function vacation_rule()
+    protected function vacation_rule()
     {
         if ($this->script_name === false || $this->script_name === null || !$this->sieve->load($this->script_name)) {
             return;
@@ -164,7 +164,7 @@ class rcube_sieve_vacation extends rcube_sieve_engine
         $this->vacation['list'] = $list;
     }
 
-    private function vacation_post()
+    protected function vacation_post()
     {
         if (empty($_POST)) {
             return;
@@ -388,7 +388,7 @@ class rcube_sieve_vacation extends rcube_sieve_engine
             }
         }
 
-        $interval_txt = $interval->show(self::vacation_interval($this->vacation));
+        $interval_txt = $interval->show(self::vacation_interval($this->vacation, $this->exts));
         if ($seconds_extension) {
             $interval_select = new html_select(array('name' => 'vacation_interval_type'));
             $interval_select->add($this->plugin->gettext('days'), 'days');
@@ -521,7 +521,7 @@ class rcube_sieve_vacation extends rcube_sieve_engine
         return $out;
     }
 
-    public static function build_regexp_tests($date_from, $date_to, &$error)
+    protected static function build_regexp_tests($date_from, $date_to, &$error)
     {
         $tests    = array();
         $dt_from  = rcube_utils::anytodatetime($date_from);
@@ -562,7 +562,7 @@ class rcube_sieve_vacation extends rcube_sieve_engine
         return $tests;
     }
 
-    public static function parse_regexp_tests($tests)
+    protected static function parse_regexp_tests($tests)
     {
         $rx_from = '/^\(([0-9]{2}).*\)\s([A-Za-z]+)\s([0-9]{4})/';
         $rx_to   = '/^\(.*([0-9]{2})\)\s([A-Za-z]+)\s([0-9]{4})/';
@@ -588,10 +588,10 @@ class rcube_sieve_vacation extends rcube_sieve_engine
     /**
      * Get current vacation interval
      */
-    public static function vacation_interval(&$vacation)
+    public static function vacation_interval(&$vacation, $extensions = array())
     {
         $rcube = rcube::get_instance();
-        $seconds_extension = in_array('vacation-seconds', $this->exts);
+        $seconds_extension = in_array('vacation-seconds', $extensions);
 
         if (isset($vacation['seconds'])) {
             $interval = $vacation['seconds'];