Merge branch 'master' of github.com:roundcube/roundcubemail

1 files changed, 1154 insertions, 0 deletions

diff --git a/plugins/managesieve/lib/Roundcube/rcube_sieve_script.php b/plugins/managesieve/lib/Roundcube/rcube_sieve_script.php
new file mode 100644
index 000000000..36eb1bcf8
--- /dev/null
+++ b/plugins/managesieve/lib/Roundcube/rcube_sieve_script.php
@@ -0,0 +1,1154 @@
+<?php
+
+/**
+ *  Class for operations on Sieve scripts
+ *
+ * Copyright (C) 2008-2011, The Roundcube Dev Team
+ * Copyright (C) 2011, Kolab Systems AG
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2
+ * as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License along
+ * with this program; if not, write to the Free Software Foundation, Inc.,
+ * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
+ */
+
+class rcube_sieve_script
+{
+    public $content = array();      // script rules array
+
+    private $vars = array();        // "global" variables
+    private $prefix = '';           // script header (comments)
+    private $supported = array(     // Sieve extensions supported by class
+        'fileinto',                 // RFC5228
+        'envelope',                 // RFC5228
+        'reject',                   // RFC5429
+        'ereject',                  // RFC5429
+        'copy',                     // RFC3894
+        'vacation',                 // RFC5230
+        'relational',               // RFC3431
+        'regex',                    // draft-ietf-sieve-regex-01
+        'imapflags',                // draft-melnikov-sieve-imapflags-06
+        'imap4flags',               // RFC5232
+        'include',                  // draft-ietf-sieve-include-12
+        'variables',                // RFC5229
+        'body',                     // RFC5173
+        'subaddress',               // RFC5233
+        'enotify',                  // RFC5435
+        'notify',                   // draft-ietf-sieve-notify-00
+        // @TODO: spamtest+virustest, mailbox, date
+    );
+
+    /**
+     * Object constructor
+     *
+     * @param  string  Script's text content
+     * @param  array   List of capabilities supported by server
+     */
+    public function __construct($script, $capabilities=array())
+    {
+        $capabilities = array_map('strtolower', (array) $capabilities);
+
+        // disable features by server capabilities
+        if (!empty($capabilities)) {
+            foreach ($this->supported as $idx => $ext) {
+                if (!in_array($ext, $capabilities)) {
+                    unset($this->supported[$idx]);
+                }
+            }
+        }
+
+        // Parse text content of the script
+        $this->_parse_text($script);
+    }
+
+    /**
+     * Adds rule to the script (at the end)
+     *
+     * @param string Rule name
+     * @param array  Rule content (as array)
+     *
+     * @return int The index of the new rule
+     */
+    public function add_rule($content)
+    {
+        // TODO: check this->supported
+        array_push($this->content, $content);
+        return sizeof($this->content)-1;
+    }
+
+    public function delete_rule($index)
+    {
+        if(isset($this->content[$index])) {
+            unset($this->content[$index]);
+            return true;
+        }
+        return false;
+    }
+
+    public function size()
+    {
+        return sizeof($this->content);
+    }
+
+    public function update_rule($index, $content)
+    {
+        // TODO: check this->supported
+        if ($this->content[$index]) {
+            $this->content[$index] = $content;
+            return $index;
+        }
+        return false;
+    }
+
+    /**
+     * Sets "global" variable
+     *
+     * @param string $name  Variable name
+     * @param string $value Variable value
+     * @param array  $mods  Variable modifiers
+     */
+    public function set_var($name, $value, $mods = array())
+    {
+        // Check if variable exists
+        for ($i=0, $len=count($this->vars); $i<$len; $i++) {
+            if ($this->vars[$i]['name'] == $name) {
+                break;
+            }
+        }
+
+        $var = array_merge($mods, array('name' => $name, 'value' => $value));
+        $this->vars[$i] = $var;
+    }
+
+    /**
+     * Unsets "global" variable
+     *
+     * @param string $name  Variable name
+     */
+    public function unset_var($name)
+    {
+        // Check if variable exists
+        foreach ($this->vars as $idx => $var) {
+            if ($var['name'] == $name) {
+                unset($this->vars[$idx]);
+                break;
+            }
+        }
+    }
+
+    /**
+     * Gets the value of  "global" variable
+     *
+     * @param string $name  Variable name
+     *
+     * @return string Variable value
+     */
+    public function get_var($name)
+    {
+        // Check if variable exists
+        for ($i=0, $len=count($this->vars); $i<$len; $i++) {
+            if ($this->vars[$i]['name'] == $name) {
+                return $this->vars[$i]['name'];
+            }
+        }
+    }
+
+    /**
+     * Sets script header content
+     *
+     * @param string $text  Header content
+     */
+    public function set_prefix($text)
+    {
+        $this->prefix = $text;
+    }
+
+    /**
+     * Returns script as text
+     */
+    public function as_text()
+    {
+        $output = '';
+        $exts   = array();
+        $idx    = 0;
+
+        if (!empty($this->vars)) {
+            if (in_array('variables', (array)$this->supported)) {
+                $has_vars = true;
+                array_push($exts, 'variables');
+            }
+            foreach ($this->vars as $var) {
+                if (empty($has_vars)) {
+                    // 'variables' extension not supported, put vars in comments
+                    $output .= sprintf("# %s %s\n", $var['name'], $var['value']);
+                }
+                else {
+                    $output .= 'set ';
+                    foreach (array_diff(array_keys($var), array('name', 'value')) as $opt) {
+                        $output .= ":$opt ";
+                    }
+                    $output .= self::escape_string($var['name']) . ' ' . self::escape_string($var['value']) . ";\n";
+                }
+            }
+        }
+
+        $imapflags = in_array('imap4flags', $this->supported) ? 'imap4flags' : 'imapflags';
+        $notify    = in_array('enotify', $this->supported) ? 'enotify' : 'notify';
+
+        // rules
+        foreach ($this->content as $rule) {
+            $extension = '';
+            $script    = '';
+            $tests     = array();
+            $i         = 0;
+
+            // header
+            if (!empty($rule['name']) && strlen($rule['name'])) {
+                $script .= '# rule:[' . $rule['name'] . "]\n";
+            }
+
+            // constraints expressions
+            if (!empty($rule['tests'])) {
+                foreach ($rule['tests'] as $test) {
+                    $tests[$i] = '';
+                    switch ($test['test']) {
+                    case 'size':
+                        $tests[$i] .= ($test['not'] ? 'not ' : '');
+                        $tests[$i] .= 'size :' . ($test['type']=='under' ? 'under ' : 'over ') . $test['arg'];
+                        break;
+
+                    case 'true':
+                        $tests[$i] .= ($test['not'] ? 'false' : 'true');
+                        break;
+
+                    case 'exists':
+                        $tests[$i] .= ($test['not'] ? 'not ' : '');
+                        $tests[$i] .= 'exists ' . self::escape_string($test['arg']);
+                        break;
+
+                    case 'header':
+                        $tests[$i] .= ($test['not'] ? 'not ' : '');
+                        $tests[$i] .= 'header';
+
+                        if (!empty($test['type'])) {
+                            // relational operator + comparator
+                            if (preg_match('/^(value|count)-([gteqnl]{2})/', $test['type'], $m)) {
+                                array_push($exts, 'relational');
+                                array_push($exts, 'comparator-i;ascii-numeric');
+
+                                $tests[$i] .= ' :' . $m[1] . ' "' . $m[2] . '" :comparator "i;ascii-numeric"';
+                            }
+                            else {
+                                $this->add_comparator($test, $tests[$i], $exts);
+
+                                if ($test['type'] == 'regex') {
+                                    array_push($exts, 'regex');
+                                }
+
+                                $tests[$i] .= ' :' . $test['type'];
+                            }
+                        }
+
+                        $tests[$i] .= ' ' . self::escape_string($test['arg1']);
+                        $tests[$i] .= ' ' . self::escape_string($test['arg2']);
+                        break;
+
+                    case 'address':
+                    case 'envelope':
+                        if ($test['test'] == 'envelope') {
+                            array_push($exts, 'envelope');
+                        }
+
+                        $tests[$i] .= ($test['not'] ? 'not ' : '');
+                        $tests[$i] .= $test['test'];
+
+                        if (!empty($test['part'])) {
+                            $tests[$i] .= ' :' . $test['part'];
+                            if ($test['part'] == 'user' || $test['part'] == 'detail') {
+                                array_push($exts, 'subaddress');
+                            }
+                        }
+
+                        $this->add_comparator($test, $tests[$i], $exts);
+
+                        if (!empty($test['type'])) {
+                            if ($test['type'] == 'regex') {
+                                array_push($exts, 'regex');
+                            }
+                            $tests[$i] .= ' :' . $test['type'];
+                        }
+
+                        $tests[$i] .= ' ' . self::escape_string($test['arg1']);
+                        $tests[$i] .= ' ' . self::escape_string($test['arg2']);
+                        break;
+
+                    case 'body':
+                        array_push($exts, 'body');
+
+                        $tests[$i] .= ($test['not'] ? 'not ' : '') . 'body';
+
+                        $this->add_comparator($test, $tests[$i], $exts);
+
+                        if (!empty($test['part'])) {
+                            $tests[$i] .= ' :' . $test['part'];
+
+                            if (!empty($test['content']) && $test['part'] == 'content') {
+                                $tests[$i] .= ' ' . self::escape_string($test['content']);
+                            }
+                        }
+
+                        if (!empty($test['type'])) {
+                            if ($test['type'] == 'regex') {
+                                array_push($exts, 'regex');
+                            }
+                            $tests[$i] .= ' :' . $test['type'];
+                        }
+
+                        $tests[$i] .= ' ' . self::escape_string($test['arg']);
+                        break;
+                    }
+                    $i++;
+                }
+            }
+
+            // disabled rule: if false #....
+            if (!empty($tests)) {
+                $script .= 'if ' . ($rule['disabled'] ? 'false # ' : '');
+
+                if (count($tests) > 1) {
+                    $tests_str = implode(', ', $tests);
+                }
+                else {
+                    $tests_str = $tests[0];
+                }
+
+                if ($rule['join'] || count($tests) > 1) {
+                    $script .= sprintf('%s (%s)', $rule['join'] ? 'allof' : 'anyof', $tests_str);
+                }
+                else {
+                    $script .= $tests_str;
+                }
+                $script .= "\n{\n";
+            }
+
+            // action(s)
+            if (!empty($rule['actions'])) {
+                foreach ($rule['actions'] as $action) {
+                    $action_script = '';
+
+                    switch ($action['type']) {
+
+                    case 'fileinto':
+                        array_push($exts, 'fileinto');
+                        $action_script .= 'fileinto ';
+                        if ($action['copy']) {
+                            $action_script .= ':copy ';
+                            array_push($exts, 'copy');
+                        }
+                        $action_script .= self::escape_string($action['target']);
+                        break;
+
+                    case 'redirect':
+                        $action_script .= 'redirect ';
+                        if ($action['copy']) {
+                            $action_script .= ':copy ';
+                            array_push($exts, 'copy');
+                        }
+                        $action_script .= self::escape_string($action['target']);
+                        break;
+
+                    case 'reject':
+                    case 'ereject':
+                        array_push($exts, $action['type']);
+                        $action_script .= $action['type'].' '
+                            . self::escape_string($action['target']);
+                        break;
+
+                    case 'addflag':
+                    case 'setflag':
+                    case 'removeflag':
+                        array_push($exts, $imapflags);
+                        $action_script .= $action['type'].' '
+                            . self::escape_string($action['target']);
+                        break;
+
+                    case 'keep':
+                    case 'discard':
+                    case 'stop':
+                        $action_script .= $action['type'];
+                        break;
+
+                    case 'include':
+                        array_push($exts, 'include');
+                        $action_script .= 'include ';
+                        foreach (array_diff(array_keys($action), array('target', 'type')) as $opt) {
+                            $action_script .= ":$opt ";
+                        }
+                        $action_script .= self::escape_string($action['target']);
+                        break;
+
+                    case 'set':
+                        array_push($exts, 'variables');
+                        $action_script .= 'set ';
+                        foreach (array_diff(array_keys($action), array('name', 'value', 'type')) as $opt) {
+                            $action_script .= ":$opt ";
+                        }
+                        $action_script .= self::escape_string($action['name']) . ' ' . self::escape_string($action['value']);
+                        break;
+
+                    case 'notify':
+                        array_push($exts, $notify);
+                        $action_script .= 'notify';
+
+                        // Here we support only 00 version of notify draft, there
+                        // were a couple regressions in 00 to 04 changelog, we use
+                        // the version used by Cyrus
+                        if ($notify == 'notify') {
+                            switch ($action['importance']) {
+                                case 1: $action_script .= " :high"; break;
+                                case 2: $action_script .= " :normal"; break;
+                                case 3: $action_script .= " :low"; break;
+
+                            }
+                            unset($action['importance']);
+                        }
+
+                        foreach (array('from', 'importance', 'options', 'message') as $n_tag) {
+                            if (!empty($action[$n_tag])) {
+                                $action_script .= " :$n_tag " . self::escape_string($action[$n_tag]);
+                            }
+                        }
+
+                        if (!empty($action['address'])) {
+                            $method = 'mailto:' . $action['address'];
+                            if (!empty($action['body'])) {
+                                $method .= '?body=' . rawurlencode($action['body']);
+                            }
+                        }
+                        else {
+                            $method = $action['method'];
+                        }
+
+                        // method is optional in notify extension
+                        if (!empty($method)) {
+                            $action_script .= ($notify == 'notify' ? " :method " : " ") . self::escape_string($method);
+                        }
+
+                        break;
+
+                    case 'vacation':
+                        array_push($exts, 'vacation');
+                        $action_script .= 'vacation';
+                        if (!empty($action['days']))
+                            $action_script .= " :days " . $action['days'];
+                        if (!empty($action['addresses']))
+                            $action_script .= " :addresses " . self::escape_string($action['addresses']);
+                        if (!empty($action['subject']))
+                            $action_script .= " :subject " . self::escape_string($action['subject']);
+                        if (!empty($action['handle']))
+                            $action_script .= " :handle " . self::escape_string($action['handle']);
+                        if (!empty($action['from']))
+                            $action_script .= " :from " . self::escape_string($action['from']);
+                        if (!empty($action['mime']))
+                            $action_script .= " :mime";
+                        $action_script .= " " . self::escape_string($action['reason']);
+                        break;
+                    }
+
+                    if ($action_script) {
+                        $script .= !empty($tests) ? "\t" : '';
+                        $script .= $action_script . ";\n";
+                    }
+                }
+            }
+
+            if ($script) {
+                $output .= $script . (!empty($tests) ? "}\n" : '');
+                $idx++;
+            }
+        }
+
+        // requires
+        if (!empty($exts))
+            $output = 'require ["' . implode('","', array_unique($exts)) . "\"];\n" . $output;
+
+        if (!empty($this->prefix)) {
+            $output = $this->prefix . "\n\n" . $output;
+        }
+
+        return $output;
+    }
+
+    /**
+     * Returns script object
+     *
+     */
+    public function as_array()
+    {
+        return $this->content;
+    }
+
+    /**
+     * Returns array of supported extensions
+     *
+     */
+    public function get_extensions()
+    {
+        return array_values($this->supported);
+    }
+
+    /**
+     * Converts text script to rules array
+     *
+     * @param string Text script
+     */
+    private function _parse_text($script)
+    {
+        $prefix     = '';
+        $options = array();
+
+        while ($script) {
+            $script = trim($script);
+            $rule   = array();
+
+            // Comments
+            while (!empty($script) && $script[0] == '#') {
+                $endl = strpos($script, "\n");
+                $line = $endl ? substr($script, 0, $endl) : $script;
+
+                // Roundcube format
+                if (preg_match('/^# rule:\[(.*)\]/', $line, $matches)) {
+                    $rulename = $matches[1];
+                }
+                // KEP:14 variables
+                else if (preg_match('/^# (EDITOR|EDITOR_VERSION) (.+)$/', $line, $matches)) {
+                    $this->set_var($matches[1], $matches[2]);
+                }
+                // Horde-Ingo format
+                else if (!empty($options['format']) && $options['format'] == 'INGO'
+                    && preg_match('/^# (.*)/', $line, $matches)
+                ) {
+                    $rulename = $matches[1];
+                }
+                else if (empty($options['prefix'])) {
+                    $prefix .= $line . "\n";
+                }
+
+                $script = ltrim(substr($script, strlen($line) + 1));
+            }
+
+            // handle script header
+            if (empty($options['prefix'])) {
+                $options['prefix'] = true;
+                if ($prefix && strpos($prefix, 'horde.org/ingo')) {
+                    $options['format'] = 'INGO';
+                }
+            }
+
+            // Control structures/blocks
+            if (preg_match('/^(if|else|elsif)/i', $script)) {
+                $rule = $this->_tokenize_rule($script);
+                if (strlen($rulename) && !empty($rule)) {
+                    $rule['name'] = $rulename;
+                }
+            }
+            // Simple commands
+            else {
+                $rule = $this->_parse_actions($script, ';');
+                if (!empty($rule[0]) && is_array($rule)) {
+                    // set "global" variables
+                    if ($rule[0]['type'] == 'set') {
+                        unset($rule[0]['type']);
+                        $this->vars[] = $rule[0];
+                    }
+                    else {
+                        $rule = array('actions' => $rule);
+                    }
+                }
+            }
+
+            $rulename = '';
+
+            if (!empty($rule)) {
+                $this->content[] = $rule;
+            }
+        }
+
+        if (!empty($prefix)) {
+            $this->prefix = trim($prefix);
+        }
+    }
+
+    /**
+     * Convert text script fragment to rule object
+     *
+     * @param string Text rule
+     *
+     * @return array Rule data
+     */
+    private function _tokenize_rule(&$content)
+    {
+        $cond = strtolower(self::tokenize($content, 1));
+
+        if ($cond != 'if' && $cond != 'elsif' && $cond != 'else') {
+            return null;
+        }
+
+        $disabled = false;
+        $join     = false;
+
+        // disabled rule (false + comment): if false # .....
+        if (preg_match('/^\s*false\s+#/i', $content)) {
+            $content = preg_replace('/^\s*false\s+#\s*/i', '', $content);
+            $disabled = true;
+        }
+
+        while (strlen($content)) {
+            $tokens = self::tokenize($content, true);
+            $separator = array_pop($tokens);
+
+            if (!empty($tokens)) {
+                $token = array_shift($tokens);
+            }
+            else {
+                $token = $separator;
+            }
+
+            $token = strtolower($token);
+
+            if ($token == 'not') {
+                $not = true;
+                $token = strtolower(array_shift($tokens));
+            }
+            else {
+                $not = false;
+            }
+
+            switch ($token) {
+            case 'allof':
+                $join = true;
+                break;
+            case 'anyof':
+                break;
+
+            case 'size':
+                $size = array('test' => 'size', 'not'  => $not);
+                for ($i=0, $len=count($tokens); $i<$len; $i++) {
+                    if (!is_array($tokens[$i])
+                        && preg_match('/^:(under|over)$/i', $tokens[$i])
+                    ) {
+                        $size['type'] = strtolower(substr($tokens[$i], 1));
+                    }
+                    else {
+                        $size['arg'] = $tokens[$i];
+                    }
+                }
+
+                $tests[] = $size;
+                break;
+
+            case 'header':
+                $header = array('test' => 'header', 'not' => $not, 'arg1' => '', 'arg2' => '');
+                for ($i=0, $len=count($tokens); $i<$len; $i++) {
+                    if (!is_array($tokens[$i]) && preg_match('/^:comparator$/i', $tokens[$i])) {
+                        $header['comparator'] = $tokens[++$i];
+                    }
+                    else if (!is_array($tokens[$i]) && preg_match('/^:(count|value)$/i', $tokens[$i])) {
+                        $header['type'] = strtolower(substr($tokens[$i], 1)) . '-' . $tokens[++$i];
+                    }
+                    else if (!is_array($tokens[$i]) && preg_match('/^:(is|contains|matches|regex)$/i', $tokens[$i])) {
+                        $header['type'] = strtolower(substr($tokens[$i], 1));
+                    }
+                    else {
+                        $header['arg1'] = $header['arg2'];
+                        $header['arg2'] = $tokens[$i];
+                    }
+                }
+
+                $tests[] = $header;
+                break;
+
+            case 'address':
+            case 'envelope':
+                $header = array('test' => $token, 'not' => $not, 'arg1' => '', 'arg2' => '');
+                for ($i=0, $len=count($tokens); $i<$len; $i++) {
+                    if (!is_array($tokens[$i]) && preg_match('/^:comparator$/i', $tokens[$i])) {
+                        $header['comparator'] = $tokens[++$i];
+                    }
+                    else if (!is_array($tokens[$i]) && preg_match('/^:(is|contains|matches|regex)$/i', $tokens[$i])) {
+                        $header['type'] = strtolower(substr($tokens[$i], 1));
+                    }
+                    else if (!is_array($tokens[$i]) && preg_match('/^:(localpart|domain|all|user|detail)$/i', $tokens[$i])) {
+                        $header['part'] = strtolower(substr($tokens[$i], 1));
+                    }
+                    else {
+                        $header['arg1'] = $header['arg2'];
+                        $header['arg2'] = $tokens[$i];
+                    }
+                }
+
+                $tests[] = $header;
+                break;
+
+            case 'body':
+                $header = array('test' => 'body', 'not' => $not, 'arg' => '');
+                for ($i=0, $len=count($tokens); $i<$len; $i++) {
+                    if (!is_array($tokens[$i]) && preg_match('/^:comparator$/i', $tokens[$i])) {
+                        $header['comparator'] = $tokens[++$i];
+                    }
+                    else if (!is_array($tokens[$i]) && preg_match('/^:(is|contains|matches|regex)$/i', $tokens[$i])) {
+                        $header['type'] = strtolower(substr($tokens[$i], 1));
+                    }
+                    else if (!is_array($tokens[$i]) && preg_match('/^:(raw|content|text)$/i', $tokens[$i])) {
+                        $header['part'] = strtolower(substr($tokens[$i], 1));
+
+                        if ($header['part'] == 'content') {
+                            $header['content'] = $tokens[++$i];
+                        }
+                    }
+                    else {
+                        $header['arg'] = $tokens[$i];
+                    }
+                }
+
+                $tests[] = $header;
+                break;
+
+            case 'exists':
+                $tests[] = array('test' => 'exists', 'not'  => $not,
+                    'arg'  => array_pop($tokens));
+                break;
+
+            case 'true':
+                $tests[] = array('test' => 'true', 'not'  => $not);
+                break;
+
+            case 'false':
+                $tests[] = array('test' => 'true', 'not'  => !$not);
+                break;
+            }
+
+            // goto actions...
+            if ($separator == '{') {
+                break;
+            }
+        }
+
+        // ...and actions block
+        $actions = $this->_parse_actions($content);
+
+        if ($tests && $actions) {
+            $result = array(
+                'type'     => $cond,
+                'tests'    => $tests,
+                'actions'  => $actions,
+                'join'     => $join,
+                'disabled' => $disabled,
+            );
+        }
+
+        return $result;
+    }
+
+    /**
+     * Parse body of actions section
+     *
+     * @param string $content  Text body
+     * @param string $end      End of text separator
+     *
+     * @return array Array of parsed action type/target pairs
+     */
+    private function _parse_actions(&$content, $end = '}')
+    {
+        $result = null;
+
+        while (strlen($content)) {
+            $tokens = self::tokenize($content, true);
+            $separator = array_pop($tokens);
+
+            if (!empty($tokens)) {
+                $token = array_shift($tokens);
+            }
+            else {
+                $token = $separator;
+            }
+
+            switch ($token) {
+            case 'discard':
+            case 'keep':
+            case 'stop':
+                $result[] = array('type' => $token);
+                break;
+
+            case 'fileinto':
+            case 'redirect':
+                $copy   = false;
+                $target = '';
+
+                for ($i=0, $len=count($tokens); $i<$len; $i++) {
+                    if (strtolower($tokens[$i]) == ':copy') {
+                        $copy = true;
+                    }
+                    else {
+                        $target = $tokens[$i];
+                    }
+                }
+
+                $result[] = array('type' => $token, 'copy' => $copy,
+                    'target' => $target);
+                break;
+
+            case 'reject':
+            case 'ereject':
+                $result[] = array('type' => $token, 'target' => array_pop($tokens));
+                break;
+
+            case 'vacation':
+                $vacation = array('type' => 'vacation', 'reason' => array_pop($tokens));
+
+                for ($i=0, $len=count($tokens); $i<$len; $i++) {
+                    $tok = strtolower($tokens[$i]);
+                    if ($tok == ':days') {
+                        $vacation['days'] = $tokens[++$i];
+                    }
+                    else if ($tok == ':subject') {
+                        $vacation['subject'] = $tokens[++$i];
+                    }
+                    else if ($tok == ':addresses') {
+                        $vacation['addresses'] = $tokens[++$i];
+                    }
+                    else if ($tok == ':handle') {
+                        $vacation['handle'] = $tokens[++$i];
+                    }
+                    else if ($tok == ':from') {
+                        $vacation['from'] = $tokens[++$i];
+                    }
+                    else if ($tok == ':mime') {
+                        $vacation['mime'] = true;
+                    }
+                }
+
+                $result[] = $vacation;
+                break;
+
+            case 'setflag':
+            case 'addflag':
+            case 'removeflag':
+                $result[] = array('type' => $token,
+                    // Flags list: last token (skip optional variable)
+                    'target' => $tokens[count($tokens)-1]
+                );
+                break;
+
+            case 'include':
+                $include = array('type' => 'include', 'target' => array_pop($tokens));
+
+                // Parameters: :once, :optional, :global, :personal
+                for ($i=0, $len=count($tokens); $i<$len; $i++) {
+                    $tok = strtolower($tokens[$i]);
+                    if ($tok[0] == ':') {
+                        $include[substr($tok, 1)] = true;
+                    }
+                }
+
+                $result[] = $include;
+                break;
+
+            case 'set':
+                $set = array('type' => 'set', 'value' => array_pop($tokens), 'name' => array_pop($tokens));
+
+                // Parameters: :lower :upper :lowerfirst :upperfirst :quotewildcard :length
+                for ($i=0, $len=count($tokens); $i<$len; $i++) {
+                    $tok = strtolower($tokens[$i]);
+                    if ($tok[0] == ':') {
+                        $set[substr($tok, 1)] = true;
+                    }
+                }
+
+                $result[] = $set;
+                break;
+
+            case 'require':
+                // skip, will be build according to used commands
+                // $result[] = array('type' => 'require', 'target' => $tokens);
+                break;
+
+            case 'notify':
+                $notify = array('type' => 'notify');
+                $priorities = array(':high' => 1, ':normal' => 2, ':low' => 3);
+
+                // Parameters: :from, :importance, :options, :message
+                //     additional (optional) :method parameter for notify extension
+                for ($i=0, $len=count($tokens); $i<$len; $i++) {
+                    $tok = strtolower($tokens[$i]);
+                    if ($tok[0] == ':') {
+                        // Here we support only 00 version of notify draft, there
+                        // were a couple regressions in 00 to 04 changelog, we use
+                        // the version used by Cyrus
+                        if (isset($priorities[$tok])) {
+                            $notify['importance'] = $priorities[$tok];
+                        }
+                        else {
+                            $notify[substr($tok, 1)] = $tokens[++$i];
+                        }
+                    }
+                    else {
+                        // unnamed parameter is a :method in enotify extension
+                        $notify['method'] = $tokens[$i];
+                    }
+                }
+
+                $method_components = parse_url($notify['method']);
+                if ($method_components['scheme'] == 'mailto') {
+                    $notify['address'] = $method_components['path'];
+                    $method_params = array();
+                    if (array_key_exists('query', $method_components)) {
+                        parse_str($method_components['query'], $method_params);
+                    }
+                    $method_params = array_change_key_case($method_params, CASE_LOWER);
+                    // magic_quotes_gpc and magic_quotes_sybase affect the output of parse_str
+                    if (ini_get('magic_quotes_gpc') || ini_get('magic_quotes_sybase')) {
+                        array_map('stripslashes', $method_params);
+                    }
+                    $notify['body'] = (array_key_exists('body', $method_params)) ? $method_params['body'] : '';
+                }
+
+                $result[] = $notify;
+                break;
+
+            }
+
+            if ($separator == $end)
+                break;
+        }
+
+        return $result;
+    }
+
+    /**
+     *
+     */
+    private function add_comparator($test, &$out, &$exts)
+    {
+        if (empty($test['comparator'])) {
+            return;
+        }
+
+        if ($test['comparator'] == 'i;ascii-numeric') {
+            array_push($exts, 'relational');
+            array_push($exts, 'comparator-i;ascii-numeric');
+        }
+        else if (!in_array($test['comparator'], array('i;octet', 'i;ascii-casemap'))) {
+            array_push($exts, 'comparator-' . $test['comparator']);
+        }
+
+        // skip default comparator
+        if ($test['comparator'] != 'i;ascii-casemap') {
+            $out .= ' :comparator ' . self::escape_string($test['comparator']);
+        }
+    }
+
+    /**
+     * Escape special chars into quoted string value or multi-line string
+     * or list of strings
+     *
+     * @param string $str Text or array (list) of strings
+     *
+     * @return string Result text
+     */
+    static function escape_string($str)
+    {
+        if (is_array($str) && count($str) > 1) {
+            foreach($str as $idx => $val)
+                $str[$idx] = self::escape_string($val);
+
+            return '[' . implode(',', $str) . ']';
+        }
+        else if (is_array($str)) {
+            $str = array_pop($str);
+        }
+
+        // multi-line string
+        if (preg_match('/[\r\n\0]/', $str) || strlen($str) > 1024) {
+            return sprintf("text:\n%s\n.\n", self::escape_multiline_string($str));
+        }
+        // quoted-string
+        else {
+            return '"' . addcslashes($str, '\\"') . '"';
+        }
+    }
+
+    /**
+     * Escape special chars in multi-line string value
+     *
+     * @param string $str Text
+     *
+     * @return string Text
+     */
+    static function escape_multiline_string($str)
+    {
+        $str = preg_split('/(\r?\n)/', $str, -1, PREG_SPLIT_DELIM_CAPTURE);
+
+        foreach ($str as $idx => $line) {
+            // dot-stuffing
+            if (isset($line[0]) && $line[0] == '.') {
+                $str[$idx] = '.' . $line;
+            }
+        }
+
+        return implode($str);
+    }
+
+    /**
+     * Splits script into string tokens
+     *
+     * @param string &$str    The script
+     * @param mixed  $num     Number of tokens to return, 0 for all
+     *                        or True for all tokens until separator is found.
+     *                        Separator will be returned as last token.
+     * @param int    $in_list Enable to call recursively inside a list
+     *
+     * @return mixed Tokens array or string if $num=1
+     */
+    static function tokenize(&$str, $num=0, $in_list=false)
+    {
+        $result = array();
+
+        // remove spaces from the beginning of the string
+        while (($str = ltrim($str)) !== ''
+            && (!$num || $num === true || count($result) < $num)
+        ) {
+            switch ($str[0]) {
+
+            // Quoted string
+            case '"':
+                $len = strlen($str);
+
+                for ($pos=1; $pos<$len; $pos++) {
+                    if ($str[$pos] == '"') {
+                        break;
+                    }
+                    if ($str[$pos] == "\\") {
+                        if ($str[$pos + 1] == '"' || $str[$pos + 1] == "\\") {
+                            $pos++;
+                        }
+                    }
+                }
+                if ($str[$pos] != '"') {
+                    // error
+                }
+                // we need to strip slashes for a quoted string
+                $result[] = stripslashes(substr($str, 1, $pos - 1));
+                $str      = substr($str, $pos + 1);
+                break;
+
+            // Parenthesized list
+            case '[':
+                $str = substr($str, 1);
+                $result[] = self::tokenize($str, 0, true);
+                break;
+            case ']':
+                $str = substr($str, 1);
+                return $result;
+                break;
+
+            // list/test separator
+            case ',':
+            // command separator
+            case ';':
+            // block/tests-list
+            case '(':
+            case ')':
+            case '{':
+            case '}':
+                $sep = $str[0];
+                $str = substr($str, 1);
+                if ($num === true) {
+                    $result[] = $sep;
+                    break 2;
+                }
+                break;
+
+            // bracket-comment
+            case '/':
+                if ($str[1] == '*') {
+                    if ($end_pos = strpos($str, '*/')) {
+                        $str = substr($str, $end_pos + 2);
+                    }
+                    else {
+                        // error
+                        $str = '';
+                    }
+                }
+                break;
+
+            // hash-comment
+            case '#':
+                if ($lf_pos = strpos($str, "\n")) {
+                    $str = substr($str, $lf_pos);
+                    break;
+                }
+                else {
+                    $str = '';
+                }
+
+            // String atom
+            default:
+                // empty or one character
+                if ($str === '' || $str === null) {
+                    break 2;
+                }
+                if (strlen($str) < 2) {
+                    $result[] = $str;
+                    $str = '';
+                    break;
+                }
+
+                // tag/identifier/number
+                if (preg_match('/^([a-z0-9:_]+)/i', $str, $m)) {
+                    $str = substr($str, strlen($m[1]));
+
+                    if ($m[1] != 'text:') {
+                        $result[] = $m[1];
+                    }
+                    // multiline string
+                    else {
+                        // possible hash-comment after "text:"
+                        if (preg_match('/^( |\t)*(#[^\n]+)?\n/', $str, $m)) {
+                            $str = substr($str, strlen($m[0]));
+                        }
+                        // get text until alone dot in a line
+                        if (preg_match('/^(.*)\r?\n\.\r?\n/sU', $str, $m)) {
+                            $text = $m[1];
+                            // remove dot-stuffing
+                            $text = str_replace("\n..", "\n.", $text);
+                            $str = substr($str, strlen($m[0]));
+                        }
+                        else {
+                            $text = '';
+                        }
+
+                        $result[] = $text;
+                    }
+                }
+                // fallback, skip one character as infinite loop prevention
+                else {
+                    $str = substr($str, 1);
+                }
+
+                break;
+            }
+        }
+
+        return $num === 1 ? (isset($result[0]) ? $result[0] : null) : $result;
+    }
+
+}