Fix handling of header test with one-element array as header name

plugins/managesieve/Changelog

@@ -1,4 +1,7 @@
+* version 8.3 [2015-03-12]
+-----------------------------------------------------------
 - Fix PHP fatal error when visiting Vacation interface and there's no sieve script yet
+- Fix handling of header test with one-element array as header name
 
 * version 8.2 [2015-01-14]
 -----------------------------------------------------------

plugins/managesieve/composer.json

@@ -3,7 +3,7 @@
     "type": "roundcube-plugin",
     "description": "Adds a possibility to manage Sieve scripts (incoming mail filters). It's clickable interface which operates on text scripts and communicates with server using managesieve protocol. Adds Filters tab in Settings.",
     "license": "GPLv3+",
-    "version": "8.2",
+    "version": "8.3",
     "authors": [
         {
             "name": "Aleksander Machniak",

plugins/managesieve/lib/Roundcube/rcube_sieve_engine.php

@@ -63,7 +63,7 @@ class rcube_sieve_engine
         1 => 'notifyimportancehigh'
     );
 
-    const VERSION  = '8.2';
+    const VERSION  = '8.3';
     const PROGNAME = 'Roundcube (Managesieve)';
     const PORT     = 4190;
 
@@ -1394,19 +1394,21 @@ class rcube_sieve_engine
         }
 
         if (isset($rule['test'])) {
-            if (in_array($rule['test'], array('header', 'address', 'envelope'))
-                && !is_array($rule['arg1'])
-                && ($header = strtolower($rule['arg1']))
-                && isset($this->headers[$header])
-            ) {
-                $test = $header;
+            if (in_array($rule['test'], array('header', 'address', 'envelope'))) {
+                if (is_array($rule['arg1']) && count($rule['arg1']) == 1) {
+                    $rule['arg1'] = $rule['arg1'][0];
+                }
+
+                $matches = ($header = strtolower($rule['arg1'])) && isset($this->headers[$header]);
+                $test    = $matches ? $header : '...';
             }
-            else if ($rule['test'] == 'exists'
-                && !is_array($rule['arg'])
-                && ($header = strtolower($rule['arg']))
-                && isset($this->headers[$header])
-            ) {
-                $test = $header;
+            else if ($rule['test'] == 'exists') {
+                if (is_array($rule['arg']) && count($rule['arg']) == 1) {
+                    $rule['arg'] = $rule['arg'][0];
+                }
+
+                $matches = ($header = strtolower($rule['arg'])) && isset($this->headers[$header]);
+                $test    = $matches ? $header : '...';
             }
             else if (in_array($rule['test'], array('size', 'body', 'date', 'currentdate'))) {
                 $test = $rule['test'];