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mirror of https://github.com/salesagility/SuiteCRM.git synced 2024-11-21 23:47:57 +00:00
salesagility_SuiteCRM/include/Imap/ImapHandler.php
2023-08-22 17:26:37 +01:00

1052 lines
28 KiB
PHP

<?php
/**
*
* SugarCRM Community Edition is a customer relationship management program developed by
* SugarCRM, Inc. Copyright (C) 2004-2013 SugarCRM Inc.
*
* SuiteCRM is an extension to SugarCRM Community Edition developed by SalesAgility Ltd.
* Copyright (C) 2011 - 2019 SalesAgility Ltd.
*
* This program is free software; you can redistribute it and/or modify it under
* the terms of the GNU Affero General Public License version 3 as published by the
* Free Software Foundation with the addition of the following permission added
* to Section 15 as permitted in Section 7(a): FOR ANY PART OF THE COVERED WORK
* IN WHICH THE COPYRIGHT IS OWNED BY SUGARCRM, SUGARCRM DISCLAIMS THE WARRANTY
* OF NON INFRINGEMENT OF THIRD PARTY RIGHTS.
*
* 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 Affero General Public License for more
* details.
*
* You should have received a copy of the GNU Affero General Public License along with
* this program; if not, see http://www.gnu.org/licenses or write to the Free
* Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
* 02110-1301 USA.
*
* You can contact SugarCRM, Inc. headquarters at 10050 North Wolfe Road,
* SW2-130, Cupertino, CA 95014, USA. or at email address contact@sugarcrm.com.
*
* The interactive user interfaces in modified source and object code versions
* of this program must display Appropriate Legal Notices, as required under
* Section 5 of the GNU Affero General Public License version 3.
*
* In accordance with Section 7(b) of the GNU Affero General Public License version 3,
* these Appropriate Legal Notices must retain the display of the "Powered by
* SugarCRM" logo and "Supercharged by SuiteCRM" logo. If the display of the logos is not
* reasonably feasible for technical reasons, the Appropriate Legal Notices must
* display the words "Powered by SugarCRM" and "Supercharged by SuiteCRM".
*/
if (!defined('sugarEntry') || !sugarEntry) {
die('Not A Valid Entry Point');
}
require_once __DIR__ . '/ImapHandlerInterface.php';
/**
* ImapHandler
* Wrapper class for functions of IMAP PHP built in extension.
*
* @author gyula
*/
#[\AllowDynamicProperties]
class ImapHandler implements ImapHandlerInterface
{
/**
*
* @var LoggerManager
*/
protected $logger;
/**
*
* @var resource|boolean
*/
protected $stream;
/**
*
* @var bool
*/
protected $logErrors;
/**
*
* @var bool
*/
protected $logCalls;
/**
*
* @var string
*/
protected $charset;
/**
*
* @param bool $logErrors
* @param bool $logCalls
* @param null $charset
*/
public function __construct($logErrors = true, $logCalls = true, $charset = null)
{
$this->logCall(__FUNCTION__, func_get_args());
$this->logErrors = $logErrors;
$this->logCalls = $logCalls;
$this->logger = LoggerManager::getLogger();
$this->charset = $charset;
}
/**
*
* @param resource $stream
* @param bool $validate
*/
protected function setStream($stream, $validate = true)
{
if ($validate && !is_resource($stream)) {
$this->logger->warn('ImapHandler trying to set a non valid resource az stream.');
}
$this->stream = $stream;
}
/**
*
* @param bool $validate
* @return resource
*/
protected function getStream($validate = true)
{
if ($validate && !is_resource($this->stream)) {
$this->logger->warn('ImapHandler trying to use a non valid resource stream.');
}
return $this->stream;
}
/**
*
* @param array|string $errors
*/
protected function log($errors)
{
if (is_string($errors)) {
$this->log([$errors]);
} elseif ($errors && $this->logErrors) {
foreach ($errors as $error) {
if ($error) {
$this->logger->warn('An Imap error detected: ' . json_encode($error));
}
}
}
}
/**
*
* @param string $func
* @param array $args
*/
protected function logCall($func, $args)
{
if ($this->logCalls) {
$this->logger->debug('IMAP wrapper called: ' . self::class . "::$func(" . json_encode($args) . ')');
}
}
/**
*
* @param string $func
* @param mixed $ret
*/
protected function logReturn($func, $ret)
{
if ($this->logCalls) {
$this->logger->debug('IMAP wrapper return: ' . self::class . "::$func(...) => " . json_encode($ret));
}
}
/**
*
* @return boolean
*/
public function close()
{
$this->logCall(__FUNCTION__, func_get_args());
if (!$ret = imap_close($this->getStream())) {
$this->log('IMAP close error');
}
$this->logReturn(__FUNCTION__, $ret);
return $ret;
}
/**
*
* @return array
*/
public function getAlerts()
{
$this->logCall(__FUNCTION__, func_get_args());
$ret = imap_alerts();
$this->log($ret);
$this->logReturn(__FUNCTION__, $ret);
return $ret;
}
/**
*
* @return resource|boolean
*/
public function getConnection()
{
$this->logCall(__FUNCTION__, func_get_args());
$ret = $this->getStream();
$this->logReturn(__FUNCTION__, $ret);
return $ret;
}
/**
*
* @return array
*/
public function getErrors()
{
$this->logCall(__FUNCTION__, func_get_args());
$ret = imap_errors();
$this->log($ret);
$this->logReturn(__FUNCTION__, $ret);
return $ret;
}
/**
*
* @return string|boolean
*/
public function getLastError()
{
$this->logCall(__FUNCTION__, func_get_args());
$ret = imap_last_error();
$this->log($ret);
$this->logReturn(__FUNCTION__, $ret);
return $ret;
}
/**
*
* @param string $ref
* @param string $pattern
* @return array
*/
public function getMailboxes($ref, $pattern)
{
$this->logCall(__FUNCTION__, func_get_args());
$ret = imap_getmailboxes($this->getStream(), $ref, $pattern);
$this->logReturn(__FUNCTION__, $ret);
return $ret;
}
/**
*
* @return boolean
*/
public function isAvailable()
{
$this->logCall(__FUNCTION__, func_get_args());
$ret = function_exists('imap_open') && function_exists('imap_timeout');
$this->logReturn(__FUNCTION__, $ret);
return $ret;
}
/**
*
* @param string $mailbox
* @param string $username
* @param string $password
* @param int $options
* @param int $n_retries
* @param array|null $params
* @return resource|boolean
*/
public function open($mailbox, $username, $password, $options = 0, $n_retries = 0, $params = null)
{
$this->logCall(__FUNCTION__, func_get_args());
// TODO: it makes a php notice, should be fixed on a way like this:
// $stream = false;
// if ($username) {
// $stream = @imap_open($mailbox, $username, $password, $options, $n_retries, $params);
// } else {
// LoggerManager::getLogger()->error('Trying to connect to an IMAP server without username.');
// }
// if (!$stream) {
// LoggerManager::getLogger()->warn('Unable to connecting and get a stream to IMAP server.');
// }
// $this->setStream($stream);
$this->setStream(@imap_open($mailbox, $username, $password, $options, $n_retries, $params));
if (!$this->getStream()) {
$this->log('IMAP open error');
}
$this->logReturn(__FUNCTION__, $this->getStream());
return $this->getStream();
}
/**
*
* @return boolean
*/
public function ping()
{
$this->logCall(__FUNCTION__, func_get_args());
$ret = imap_ping($this->getStream());
$this->logReturn(__FUNCTION__, $ret);
return $ret;
}
/**
*
* @param string $mailbox
* @param int $options
* @param int $n_retries
* @return boolean
*/
public function reopen($mailbox, $options = 0, $n_retries = 0)
{
$this->logCall(__FUNCTION__, func_get_args());
$ret = imap_reopen($this->getStream(), $mailbox, $options, $n_retries);
if (!$ret) {
$this->log('IMAP reopen error');
}
$this->logReturn(__FUNCTION__, $ret);
return $ret;
}
/**
*
* @param int $timeout_type
* @param int $timeout
* @return mixed
*/
public function setTimeout($timeout_type, $timeout = -1)
{
$this->logCall(__FUNCTION__, func_get_args());
$ret = imap_timeout($timeout_type, $timeout);
if (!$ret) {
$this->log('IMAP set timeout error');
}
$this->logReturn(__FUNCTION__, $ret);
return $ret;
}
/**
* Execute callback and check IMAP errors for retry
* @param callback $callback
* @param string|null $charset
* @return array
*/
protected function executeImapCmd($callback, $charset=null)
{
// Default to class charset if none is specified
$emailCharset = !empty($charset) ? $charset : $this->charset;
$ret = false;
try {
$ret = $callback($emailCharset);
// catch if we have BADCHARSET as exception is not thrown
if (empty($ret) || $ret === false){
$err = imap_last_error();
if (strpos($err, 'BADCHARSET')) {
imap_errors();
throw new Exception($err);
}
}
} catch (Exception $e) {
if (strpos($e, ' [BADCHARSET (US-ASCII)]')) {
LoggerManager::getLogger()->debug("Encoding changed dynamically from {$emailCharset} to US-ASCII");
$emailCharset = 'US-ASCII';
$this->charset = $emailCharset;
$ret = $callback($emailCharset);
}
}
return $ret;
}
/**
*
* @param int $criteria
* @param int $reverse
* @param int $options
* @param string $search_criteria
* @param string $charset
* @return array
*/
public function sort($criteria, $reverse, $options = 0, $search_criteria = null, $charset = null)
{
$this->logCall(__FUNCTION__, func_get_args());
$call = function($charset) use ($criteria, $reverse, $options, $search_criteria){
return imap_sort($this->getStream(), $criteria, $reverse, $options, $search_criteria, $charset);
};
$ret = $this->executeImapCmd($call, $charset);
if (!$ret) {
$this->log('IMAP sort error');
}
$this->logReturn(__FUNCTION__, $ret);
return $ret;
}
/**
*
* @param int $uid
* @return int
*/
public function getMessageNo($uid)
{
$this->logCall(__FUNCTION__, func_get_args());
$ret = imap_msgno($this->getStream(), $uid);
$this->logReturn(__FUNCTION__, $ret);
return $ret;
}
/**
*
* @param int $msg_number
* @param int $fromLength
* @param int $subjectLength
* @param string $defaultHost
* @return bool|object Returns FALSE on error or, if successful, the information in an object
*/
public function getHeaderInfo($msg_number, $fromLength = 0, $subjectLength = 0, $defaultHost = null)
{
$this->logCall(__FUNCTION__, func_get_args());
$ret = imap_headerinfo($this->getStream(), $msg_number, $fromLength, $subjectLength, $defaultHost);
if (!$ret) {
$this->log('IMAP get header info error');
}
$this->logReturn(__FUNCTION__, $ret);
return $ret;
}
/**
*
* @param int $msg_number
* @param int $options
* @return string
*/
public function fetchHeader($msg_number, $options = 0)
{
$this->logCall(__FUNCTION__, func_get_args());
$ret = imap_fetchheader($this->getStream(), $msg_number, $options);
$this->logReturn(__FUNCTION__, $ret);
return $ret;
}
/**
*
* @param string $mailbox
* @param string $message
* @param string $options
* @param string $internal_date
* @return bool
*/
public function append($mailbox, $message, $options = null, $internal_date = null)
{
$this->logCall(__FUNCTION__, func_get_args());
// ..to evolve a warning about an invalid internal date format
// BUG at: https://github.com/php/php-src/blob/master/ext/imap/php_imap.c#L1357
// -->
if (null === $internal_date) {
$ret = imap_append($this->getStream(), $mailbox, $message, $options);
} else {
$ret = imap_append($this->getStream(), $mailbox, $message, $options, $internal_date);
}
if (!$ret) {
$this->log('IMAP append error');
}
$this->logReturn(__FUNCTION__, $ret);
return $ret;
}
/**
*
* @param int $msg_number
* @return int
*/
public function getUid($msg_number)
{
$this->logCall(__FUNCTION__, func_get_args());
$ret = imap_uid($this->getStream(), $msg_number);
$this->logReturn(__FUNCTION__, $ret);
return $ret;
}
/**
* @return bool
*/
public function expunge()
{
$this->logCall(__FUNCTION__, func_get_args());
$ret = imap_expunge($this->getStream());
if (!$ret) {
$this->log('IMAP expunge error');
}
$this->logReturn(__FUNCTION__, $ret);
return $ret;
}
/**
* @return object|bool Returns FALSE on failure.
*/
public function check()
{
$this->logCall(__FUNCTION__, func_get_args());
$ret = imap_check($this->getStream());
if (!$ret) {
$this->log('IMAP check error');
}
$this->logReturn(__FUNCTION__, $ret);
return $ret;
}
/**
*
* @param string $sequence
* @param string $flag
* @param int $options
* @return bool Returns TRUE on success or FALSE on failure.
*/
public function clearFlagFull($sequence, $flag, $options = 0)
{
$this->logCall(__FUNCTION__, func_get_args());
$ret = imap_clearflag_full($this->getStream(), $sequence, $flag, $options);
if (!$ret) {
$this->log('IMAP clearFlagFull error');
}
$this->logReturn(__FUNCTION__, $ret);
return $ret;
}
/**
*
* @param string $mailbox
* @return bool Returns TRUE on success or FALSE on failure.
*/
public function createMailbox($mailbox)
{
$this->logCall(__FUNCTION__, func_get_args());
$ret = imap_createmailbox($this->getStream(), $mailbox);
if (!$ret) {
$this->log('IMAP createMailbox error');
}
$this->logReturn(__FUNCTION__, $ret);
return $ret;
}
/**
*
* @param int $msg_number
* @param int $options
* @return bool Returns TRUE.
*/
public function delete($msg_number, $options = 0)
{
$this->logCall(__FUNCTION__, func_get_args());
$ret = imap_delete($this->getStream(), $msg_number, $options);
if (!$ret) {
$this->log('IMAP delete error');
}
$this->logReturn(__FUNCTION__, $ret);
return $ret;
}
/**
*
* @param string $mailbox
* @return bool Returns TRUE on success or FALSE on failure.
*/
public function deleteMailbox($mailbox)
{
$this->logCall(__FUNCTION__, func_get_args());
$ret = imap_deletemailbox($this->getStream(), $mailbox);
if (!$ret) {
$this->log('IMAP deleteMailbox error');
}
$this->logReturn(__FUNCTION__, $ret);
return $ret;
}
/**
*
* @param int $msg_number
* @param string $section
* @param int $options
* @return string
*/
public function fetchBody($msg_number, $section, $options = 0)
{
$this->logCall(__FUNCTION__, func_get_args());
$ret = imap_fetchbody($this->getStream(), $msg_number, $section, $options);
$this->logReturn(__FUNCTION__, $ret);
return $ret;
}
/**
*
* @param string $sequence
* @param int $options
* @return array
*/
public function fetchOverview($sequence, $options = 0)
{
$this->logCall(__FUNCTION__, func_get_args());
$ret = imap_fetch_overview($this->getStream(), $sequence, $options);
$this->logReturn(__FUNCTION__, $ret);
return $ret;
}
/**
*
* @param int $msg_number
* @param int $options
* @return object
*/
public function fetchStructure($msg_number, $options = 0)
{
$this->logCall(__FUNCTION__, func_get_args());
$ret = imap_fetchstructure($this->getStream(), $msg_number, $options);
$this->logReturn(__FUNCTION__, $ret);
return $ret;
}
/**
*
* @param int $msg_number
* @param int $options
* @return string
*/
public function getBody($msg_number, $options)
{
$this->logCall(__FUNCTION__, func_get_args());
$ret = imap_body($this->getStream(), $msg_number, $options);
$this->logReturn(__FUNCTION__, $ret);
return $ret;
}
/**
* @return int|bool Return the number of messages in the current mailbox, as an integer, or FALSE on error.
*/
public function getNumberOfMessages()
{
$this->logCall(__FUNCTION__, func_get_args());
$ret = imap_num_msg($this->getStream());
if (!$ret) {
$this->log('IMAP getNumberOfMessages error');
}
$this->logReturn(__FUNCTION__, $ret);
return $ret;
}
/**
*
* @param string $mailbox
* @param int $options
* @return object
*/
public function getStatus($mailbox, $options)
{
$this->logCall(__FUNCTION__, func_get_args());
$ret = imap_status($this->getStream(), $mailbox, $options);
$this->logReturn(__FUNCTION__, $ret);
return $ret;
}
/**
*
* @param string $msgList
* @param string $mailbox
* @param int $options
* @return bool Returns TRUE on success or FALSE on failure.
*/
public function mailCopy($msgList, $mailbox, $options = 0)
{
$this->logCall(__FUNCTION__, func_get_args());
$ret = imap_mail_copy($this->getStream(), $msgList, $mailbox, $options);
if (!$ret) {
$this->log('IMAP mailCopy error');
}
$this->logReturn(__FUNCTION__, $ret);
return $ret;
}
/**
*
* @param string $msgList
* @param string $mailbox
* @param int $options
* @return bool Returns TRUE on success or FALSE on failure.
*/
public function mailMove($msgList, $mailbox, $options = 0)
{
$this->logCall(__FUNCTION__, func_get_args());
$ret = imap_mail_move($this->getStream(), $msgList, $mailbox, $options);
if (!$ret) {
$this->log('IMAP mailMove error');
}
$this->logReturn(__FUNCTION__, $ret);
return $ret;
}
/**
*
* @param string $text
* @return array
*/
public function mimeHeaderDecode($text)
{
$this->logCall(__FUNCTION__, func_get_args());
$ret = imap_mime_header_decode($text);
$this->logReturn(__FUNCTION__, $ret);
return $ret;
}
/**
*
* @param string $old_mbox
* @param string $new_mbox
* @return bool Returns TRUE on success or FALSE on failure.
*/
public function renameMailbox($old_mbox, $new_mbox)
{
$this->logCall(__FUNCTION__, func_get_args());
$ret = imap_renamemailbox($this->getStream(), $old_mbox, $new_mbox);
if (!$ret) {
$this->log('IMAP renameMailbox error');
}
$this->logReturn(__FUNCTION__, $ret);
return $ret;
}
/**
*
* @param string $headers
* @param string $defaultHost
* @return object
*/
public function rfc822ParseHeaders($headers, $defaultHost = 'UNKNOWN')
{
$this->logCall(__FUNCTION__, func_get_args());
$ret = imap_rfc822_parse_headers($headers, $defaultHost);
$this->logReturn(__FUNCTION__, $ret);
return $ret;
}
/**
*
* @param string $criteria
* @param int $options
* @param string $charset
* @return array|bool Return FALSE if it does not understand the search criteria or no messages have been found.
*/
public function search($criteria, $options = SE_FREE, $charset = null)
{
$this->logCall(__FUNCTION__, func_get_args());
$call = function($charset) use ($criteria, $options){
return imap_search($this->getStream(), $criteria, $options, $charset);
};
$ret = $this->executeImapCmd($call, $charset);
if (!$ret) {
$this->log('IMAP search error');
}
$this->logReturn(__FUNCTION__, $ret);
return $ret;
}
/**
*
* @param string $sequence
* @param string $flag
* @param int $options
* @return bool Returns TRUE on success or FALSE on failure.
*/
public function setFlagFull($sequence, $flag, $options = NIL)
{
$this->logCall(__FUNCTION__, func_get_args());
$ret = imap_setflag_full($this->getStream(), $sequence, $flag, $options);
if (!$ret) {
$this->log('IMAP setFlagFull error');
}
$this->logReturn(__FUNCTION__, $ret);
return $ret;
}
/**
*
* @param string $mailbox
* @return bool Returns TRUE on success or FALSE on failure.
*/
public function subscribe($mailbox)
{
$this->logCall(__FUNCTION__, func_get_args());
$ret = imap_subscribe($this->getStream(), $mailbox);
if (!$ret) {
$this->log('IMAP subscribe error');
}
$this->logReturn(__FUNCTION__, $ret);
return $ret;
}
/**
*
* @param string $mailbox
* @return bool Returns TRUE on success or FALSE on failure.
*/
public function unsubscribe($mailbox)
{
$this->logCall(__FUNCTION__, func_get_args());
$ret = imap_unsubscribe($this->getStream(), $mailbox);
if (!$ret) {
$this->log('IMAP unsubscribe error');
}
$this->logReturn(__FUNCTION__, $ret);
return $ret;
}
/**
*
* @param string $data
* @return string|bool FALSE if text contains invalid modified UTF-7 sequence or text contains a character that is not part of ISO-8859-1 character set.
*/
public function utf7Encode($data)
{
$this->logCall(__FUNCTION__, func_get_args());
$ret = imap_utf7_decode($data);
if (!$ret) {
$this->log('IMAP utf7Encode error');
}
$this->logReturn(__FUNCTION__, $ret);
return $ret;
}
/**
*
* @param string $mime_encoded_text
* @return string
*/
public function utf8($mime_encoded_text)
{
$this->logCall(__FUNCTION__, func_get_args());
$ret = imap_utf8($mime_encoded_text);
$this->logReturn(__FUNCTION__, $ret);
return $ret;
}
/**
* @param $stream
* @return bool
*/
public function isValidStream($stream): bool
{
return is_resource($stream);
}
/**
* @inheritDoc
*/
public function getMessageList(
?string $filterCriteria,
$sortCriteria,
$sortOrder,
int $offset,
int $pageSize,
array &$mailboxInfo,
array $columns,
$auth_type
): array {
if (empty($filterCriteria) && $sortCriteria === SORTDATE) {
// Performance fix when no filters are enabled
$totalMsgs = $this->getNumberOfMessages();
$mailboxInfo['Nmsgs'] = $totalMsgs;
if ($sortOrder === 0) {
// Ascending order
if ($offset === "end") {
$firstMsg = $totalMsgs - (int)$pageSize;
$lastMsg = $totalMsgs;
} elseif ($offset <= 0) {
$firstMsg = 1;
$lastMsg = $firstMsg + (int)$pageSize;
} else {
$firstMsg = (int)$offset;
$lastMsg = $firstMsg + (int)$pageSize;
}
} else {
// Descending order
if ($offset === "end") {
$firstMsg = 1;
$lastMsg = $firstMsg + (int)$pageSize;
} elseif ($offset <= 0) {
$firstMsg = $totalMsgs - (int)$pageSize;
$lastMsg = $totalMsgs;
} else {
$offset = ($totalMsgs - (int)$offset) - (int)$pageSize;
$firstMsg = $offset;
$lastMsg = $firstMsg + (int)$pageSize;
}
}
$firstMsg = $firstMsg < 1 ? 1 : $firstMsg;
$firstMsg = $firstMsg > $totalMsgs ? $totalMsgs : $firstMsg;
$lastMsg = $lastMsg < $firstMsg ? $firstMsg : $lastMsg;
$lastMsg = $lastMsg > $totalMsgs ? $totalMsgs : $lastMsg;
$sequence = $firstMsg . ':' . $lastMsg;
$emailSortedHeaders = $this->fetchOverview($sequence);
$uids = [];
if (!empty($emailSortedHeaders)) {
$uids = array_map(
function ($x) {
return $x->uid;
},
$emailSortedHeaders // TODO: this should be an array!
);
}
} else {
// Filtered case and other sorting cases
// Returns an array of msgno's which are sorted and filtered
$emailSortedHeaders = $this->sort(
$sortCriteria,
$sortOrder,
SE_UID,
$filterCriteria
);
if ($emailSortedHeaders === false) {
return [];
}
$uids = array_slice($emailSortedHeaders, $offset, $pageSize);
$lastSequenceNumber = $mailboxInfo['Nmsgs'] = count($emailSortedHeaders);
// paginate
if ($offset === "end") {
$offset = $lastSequenceNumber - $pageSize;
} elseif ($offset <= 0) {
$offset = 0;
}
}
if (empty($uids)) {
return [];
}
// TODO: uids could be invalid for implode!
$uids = implode(',', $uids);
// Get result
$emailHeaders = $this->fetchOverview(
$uids,
FT_UID
);
$emailHeaders = json_decode(json_encode($emailHeaders), true);
if (isset($columns['has_attachment'])) {
// get attachment status
foreach ($emailHeaders as $i => $emailHeader) {
$structure = $this->fetchStructure($emailHeader['uid'], FT_UID);
$emailHeaders[$i]['has_attachment'] = $this->messageStructureHasAttachment($structure);
}
}
return $emailHeaders;
}
/**
* @param $structure
* @return bool
*/
public function messageStructureHasAttachment($structure): bool
{
if (($structure->type !== 0) && ($structure->type !== 1)) {
return true;
}
$attachments = [];
if (empty($structure->parts)) {
return false;
}
foreach ($structure->parts as $i => $part) {
if (empty($part) || empty($part->dparameters[0])) {
continue;
}
if (is_string($part->dparameters[0]->value)) {
$attachments[] = $part->dparameters[0]->value;
}
}
return !empty($attachments);
}
}