Optionally append original email subject to out-of-office auto-replies

plugins/managesieve/lib/Roundcube/rcube_sieve_engine.php

@@ -662,6 +662,7 @@ function save()
             $interval_types = rcube_utils::get_input_value('_action_interval_type', rcube_utils::INPUT_POST);
             $from           = rcube_utils::get_input_value('_action_from', rcube_utils::INPUT_POST, true);
             $subject        = rcube_utils::get_input_value('_action_subject', rcube_utils::INPUT_POST, true);
+            $subject_append_original = rcube_utils::get_input_value('_action_subject_append_original', rcube_utils::INPUT_POST);
             $flags          = rcube_utils::get_input_value('_action_flags', rcube_utils::INPUT_POST);
             $varnames       = rcube_utils::get_input_value('_action_varname', rcube_utils::INPUT_POST);
             $varvalues      = rcube_utils::get_input_value('_action_varvalue', rcube_utils::INPUT_POST);
@@ -1149,6 +1150,7 @@ function save()
                     $this->form['actions'][$i]['reason']    = str_replace("\r\n", "\n", $reason);
                     $this->form['actions'][$i]['from']      = $from[$idx];
                     $this->form['actions'][$i]['subject']   = $subject[$idx];
+                    $this->form['actions'][$i]['subject_append_original'] = $subject_append_original[$idx];
                     $this->form['actions'][$i]['addresses'] = $addresses[$idx];
                     $this->form['actions'][$i][$interval_type] = $intervals[$idx];
 
@@ -2434,6 +2436,14 @@ function action_div($fid, $id, $div = true)
                 'size'  => 35,
                 'class' => $this->error_class($id, 'action', 'subject', 'action_subject'),
         ]);
+        $out .= '<br>' . html::label('action_subject_append_original' . $id,
+                    html::tag('input', array(
+                        'type'    => 'checkbox',
+                        'name'    => '_action_subject_append_original[' . $id . ']',
+                        'id'      => 'action_subject_append_original' . $id,
+                        'value'   => 1,
+                        'checked' => isset($action['subject_append_original']) && $action['subject_append_original'] == 1,
+                    )) . ' ' . rcube::Q($this->plugin->gettext('vacation.subjectappendoriginal')));
         $out .= '<br><span class="label">' .rcube::Q($this->plugin->gettext('vacationfrom')) . '</span><br>';
         $out .= html::tag('input', [
                 'type'  => 'text',

plugins/managesieve/lib/Roundcube/rcube_sieve_script.php

@@ -53,6 +53,9 @@ class rcube_sieve_script
         // @TODO: virustest, mailbox
     ];
 
+    private $vacation_subject_var = 'subject';
+    private $vacation_subject_suffix = '${subject}';
+
     /**
      * Object constructor
      *
@@ -209,6 +212,12 @@ public function as_text()
         $exts   = [];
         $idx    = 0;
 
+        $add_vacation_subject_rule = $this->should_generate_vacation_subject_rule();
+        if ($add_vacation_subject_rule) {
+            $this->set_var($this->vacation_subject_var, '');
+        }
+
+
         if (!empty($this->vars)) {
             if (in_array('variables', (array)$this->supported)) {
                 $has_vars = true;
@@ -232,6 +241,12 @@ public function as_text()
         $imapflags = in_array('imap4flags', $this->supported) ? 'imap4flags' : 'imapflags';
         $notify    = in_array('enotify', $this->supported) ? 'enotify' : 'notify';
 
+        if ($add_vacation_subject_rule) {
+            $output .= 'if header :matches "subject" "*" {' . "\r\n" .
+                       "\t" . 'set "' . $this->vacation_subject_var . '" "${1}";' . "\r\n" .
+                       "}\r\n";
+        }
+
         // rules
         foreach ($this->content as $rule) {
             $script    = '';
@@ -567,7 +582,11 @@ public function as_text()
                             $action_script .= " :addresses " . self::escape_string($action['addresses']);
                         }
                         if (!empty($action['subject'])) {
-                            $action_script .= " :subject " . self::escape_string($action['subject']);
+                            $subject = trim($action['subject']);
+                            if ($action['subject_append_original'] == 1) {
+                                $subject .= $this->ends_with($subject, ':') ? ' ' : ': ' . $this->vacation_subject_suffix;
+                            }
+                            $action_script .= " :subject " . self::escape_string($subject);
                         }
                         if (!empty($action['handle'])) {
                             $action_script .= " :handle " . self::escape_string($action['handle']);
@@ -708,6 +727,13 @@ private function _parse_text($script)
                 }
             }
 
+            // Skip the rule if it is a internal vacation rule (see more at is_vacation_subject_rule function) 
+            if (!empty($rule)) {
+                if ($this->is_vacation_subject_rule($rule)) {
+                    unset($rule);
+                }
+            }
+
             if (!empty($rule)) {
                 $this->content[] = $rule;
             }
@@ -974,6 +1000,12 @@ private function _parse_actions($content, &$position, $end = '}')
                 $vargs   = ['seconds', 'days', 'addresses', 'subject', 'handle', 'from'];
                 $action += $this->action_arguments($tokens, $args, $vargs);
 
+                $subject = isset($action['subject']) ? $action['subject'] : '';
+                if (!empty($subject) && $this->ends_with($subject, ': ' . $this->vacation_subject_suffix)) {
+                    $action['subject_append_original'] = 1;
+                    $action['subject'] = trim(substr($subject, 0, -(strlen($this->vacation_subject_suffix) + 2)));
+                }
+
                 $result[] = $action;
                 break;
 
@@ -1478,4 +1510,56 @@ static function ltrim_position($content, $position, $br = true)
 
         return $position;
     }
+
+    /**
+     * Checks if the following unnamed rule is found:
+     *
+     * if header :matches "subject" "*" {
+     *    set "subject" "${1}";
+     * }
+     *
+     * This is used by Sieverules and a commonly recommended solution to append the original subject to the vacation's subject
+     * This rule is usually preceeded by setting a global variable to empty, like this:
+     *
+     * set "subject" "";
+     * if header :matches "subject" "*" { ...
+     */
+    private function is_vacation_subject_rule($rule) {
+        $name = isset($rule['name']) ? $rule['name'] : '';
+        $type = isset($rule['type']) ? $rule['type'] : '';
+        if (!empty($name) || $type != "if" || count($rule['tests']) != 1 || count($rule['actions']) != 1) {
+            return false;
+        }
+
+        $test = $rule['tests'][0];
+        $action = $rule['actions'][0];
+
+        return $test['test'] == 'header' && $test['type'] == 'matches' && $test['arg1'] == 'subject' && $test['arg2'] == '*'
+                && $action['type'] == 'set' && $action['name'] == 'subject' && $action['value'] == '${1}';
+    }
+
+    /**
+     * Checks if there is any vacation rule that wants to append original subject to the vacation's subject
+     */
+    private function should_generate_vacation_subject_rule() {
+        foreach ($this->content as $rule) {
+            foreach ($rule['actions'] as $action) {
+                if ($action['type'] == 'vacation' && isset($action['subject_append_original']) && $action['subject_append_original'] == 1) {
+                    return true;
+                }
+            }
+        }
+        return false;
+    }
+
+    function ends_with($haystack, $needle) {
+        if ('' === $needle) {
+            return true;
+        }
+        if ('' === $haystack && '' !== $needle) {
+            return false;
+        }
+        $length = strlen($needle);
+        return strlen($haystack) >= $length && 0 === substr_compare($haystack, $needle, -$length, $length);
+    }
 }

plugins/managesieve/lib/Roundcube/rcube_sieve_vacation.php

@@ -187,6 +187,7 @@ protected function vacation_post()
         $status        = rcube_utils::get_input_string('vacation_status', rcube_utils::INPUT_POST);
         $from          = rcube_utils::get_input_string('vacation_from', rcube_utils::INPUT_POST, true);
         $subject       = rcube_utils::get_input_string('vacation_subject', rcube_utils::INPUT_POST, true);
+        $subject_append_original = rcube_utils::get_input_value('vacation_subject_append_original', rcube_utils::INPUT_POST);
         $reason        = rcube_utils::get_input_string('vacation_reason', rcube_utils::INPUT_POST, true);
         $addresses     = rcube_utils::get_input_value('vacation_addresses', rcube_utils::INPUT_POST, true);
         $interval      = rcube_utils::get_input_string('vacation_interval', rcube_utils::INPUT_POST);
@@ -204,6 +205,7 @@ protected function vacation_post()
         $vacation_action['type']         = 'vacation';
         $vacation_action['reason']       = $this->strip_value(str_replace("\r\n", "\n", $reason), true);
         $vacation_action['subject']      = trim($subject);
+        $vacation_action['subject_append_original'] = $subject_append_original == 1 ? 1 : NULL;
         $vacation_action['from']         = trim($from);
         $vacation_action['addresses']    = $addresses;
         $vacation_action[$interval_type] = $interval;
@@ -393,6 +395,7 @@ public function vacation_form($attrib)
         // form elements
         $from      = new html_inputfield(['name' => 'vacation_from', 'id' => 'vacation_from', 'size' => 50, 'class' => 'form-control']);
         $subject   = new html_inputfield(['name' => 'vacation_subject', 'id' => 'vacation_subject', 'size' => 50, 'class' => 'form-control']);
+        $subject_append_original = new html_inputfield(['name' => 'vacation_subject_append_original', 'id' => 'vacation_subject_append_original', 'type' => 'checkbox', 'class' => 'form-control']);
         $reason    = new html_textarea(['name' => 'vacation_reason', 'id' => 'vacation_reason', 'cols' => 60, 'rows' => 8]);
         $interval  = new html_inputfield(['name' => 'vacation_interval', 'id' => 'vacation_interval', 'size' => 5, 'class' => 'form-control']);
         $addresses = '<textarea name="vacation_addresses" id="vacation_addresses" data-type="list" data-size="30" style="display: none">'
@@ -524,6 +527,9 @@ public function vacation_form($attrib)
 
         $table->add('title', html::label('vacation_subject', $this->plugin->gettext('vacation.subject')));
         $table->add(null, $subject->show(!empty($this->vacation['subject']) ? $this->vacation['subject'] : null));
+        $table->add('title', '');
+        $table->add(null, $subject_append_original->show('1', ['checked' => isset($this->vacation['subject_append_original']) && $this->vacation['subject_append_original'] == 1 ? 'checked' : ''])
+            . html::label('vacation_subject_append_original', $this->plugin->gettext('vacation.subjectappendoriginal')));
         $table->add('title', html::label('vacation_reason', $this->plugin->gettext('vacation.body')));
         $table->add(null, $reason->show(!empty($this->vacation['reason']) ? $this->vacation['reason'] : null));
 

plugins/managesieve/localization/de_DE.inc

@@ -201,6 +201,7 @@ $labels['vacation.reply'] = 'Antwort';
 $labels['vacation.advanced'] = 'Erweiterte Einstellungen';
 $labels['vacation.from'] = 'Antwort E-Mail-Adresse:';
 $labels['vacation.subject'] = 'Betreff';
+$labels['vacation.subjectappendoriginal'] = 'Anhängen des ursprünglichen Betreffs an die Antwort';
 $labels['vacation.body'] = 'Nachricht';
 $labels['vacation.start'] = 'Beginn der Abwesenheit';
 $labels['vacation.end'] = 'Ende der Abwesenheit';

plugins/managesieve/localization/en_GB.inc

@@ -201,6 +201,7 @@ $labels['vacation.reply'] = 'Reply message';
 $labels['vacation.advanced'] = 'Advanced settings';
 $labels['vacation.from'] = 'Reply sender address';
 $labels['vacation.subject'] = 'Subject';
+$labels['vacation.subjectappendoriginal'] = 'Append original subject to the reply';
 $labels['vacation.body'] = 'Body';
 $labels['vacation.start'] = 'Start time';
 $labels['vacation.end'] = 'End time';

plugins/managesieve/localization/en_US.inc

@@ -201,6 +201,7 @@ $labels['vacation.reply'] = 'Reply message';
 $labels['vacation.advanced'] = 'Advanced settings';
 $labels['vacation.from'] = 'Reply sender address';
 $labels['vacation.subject'] = 'Subject';
+$labels['vacation.subjectappendoriginal'] = 'Append original subject to the reply';
 $labels['vacation.body'] = 'Body';
 $labels['vacation.start'] = 'Start time';
 $labels['vacation.end'] = 'End time';

plugins/managesieve/localization/hu_HU.inc

@@ -201,6 +201,7 @@ $labels['vacation.reply'] = 'Válasz az üzenetre';
 $labels['vacation.advanced'] = 'Haladó beállítások';
 $labels['vacation.from'] = 'Válasz küldőjének címe:';
 $labels['vacation.subject'] = 'Tárgy';
+$labels['vacation.subjectappendoriginal'] = 'Eredeti tárgy hozzáfűzése a válaszhoz';
 $labels['vacation.body'] = 'Törzs';
 $labels['vacation.start'] = 'Kezdő időpontja';
 $labels['vacation.end'] = 'Befejezés időpontja';

plugins/managesieve/tests/src/parser_vacation_append_original_subject

@@ -0,0 +1,10 @@
+require ["vacation","variables"];
+set "subject" "";
+if header :matches "subject" "*" {
+	set "subject" "${1}";
+}
+# rule:[Out of Office]
+if true
+{
+	vacation :days 3 :subject "Out of office: ${subject}" "Went for holiday";
+}