Current File : /www/varak.net/dmarc.varak.net/classes/Mail/MailMessage.php
<?php
/**
* dmarc-srg - A php parser, viewer and summary report generator for incoming DMARC reports.
* Copyright (C) 2020-2024 Aleksey Andreev (liuch)
*
* Available at:
* https://github.com/liuch/dmarc-srg
*
* This program is free software: you can redistribute it and/or modify it
* under the terms of the GNU General Public License as published by the Free
* Software Foundation, either version 3 of the License.
*
* 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, see <http://www.gnu.org/licenses/>.
*/
namespace Liuch\DmarcSrg\Mail;
use Liuch\DmarcSrg\Core;
use Liuch\DmarcSrg\Exception\SoftException;
use Liuch\DmarcSrg\Exception\MailboxException;
class MailMessage
{
private $conn;
private $number;
private $attachment;
private $attachments_cnt;
public function __construct($conn, $number)
{
$this->conn = $conn;
$this->number = $number;
$this->attachment = null;
$this->attachments_cnt = -1;
}
public function overview()
{
$res = @imap_fetch_overview($this->conn, strval($this->number), FT_UID);
if (!isset($res[0])) {
if ($error_message = imap_last_error()) {
Core::instance()->logger()->error("imap_fetch_overview failed: {$error_message}");
}
MailBox::resetErrorStack();
return false;
}
return $res[0];
}
public function setSeen()
{
MailBox::resetErrorStack();
@imap_setflag_full($this->conn, strval($this->number), '\\Seen', ST_UID);
if (($error_message = imap_last_error())) {
MailBox::resetErrorStack();
Core::instance()->logger()->error("imap_setflag_full failed: {$error_message}");
throw new MailboxException("Failed to make a message seen: {$error_message}");
}
}
public function validate()
{
$this->ensureAttachment();
if ($this->attachments_cnt !== 1) {
throw new SoftException("Attachment count is not valid ({$this->attachments_cnt})");
}
$bytes = $this->attachment->size();
if ($bytes === -1) {
throw new SoftException("Failed to get attached file size. Wrong message format?");
}
if ($bytes < 50 || $bytes > 1 * 1024 * 1024) {
throw new SoftException("Attachment file size is not valid ({$bytes} bytes)");
}
$mime_type = $this->attachment->mimeType();
if (!in_array($mime_type, [ 'application/zip', 'application/gzip', 'application/x-gzip', 'text/xml' ])) {
throw new SoftException("Attachment file type is not valid ({$mime_type})");
}
}
public function attachment()
{
return $this->attachment;
}
private function ensureAttachment()
{
if ($this->attachments_cnt === -1) {
$structure = imap_fetchstructure($this->conn, $this->number, FT_UID);
if ($structure === false) {
throw new MailboxException('FetchStructure failed: ' . imap_last_error());
}
$this->attachments_cnt = 0;
$parts = isset($structure->parts) ? $structure->parts : [ $structure ];
$allParts = [];
foreach ($parts as $index => &$part) {
$msgIndex = $index + 1;
// when it's an entire attached message: MESSAGE/RFC822
if (isset($part->parts) && count($part->parts) > 0) {
foreach ($part->parts as $subIndex => &$subPart) {
$allParts[$msgIndex . '.' . ($subIndex + 1)] = $subPart;
}
unset($subPart);// Remove the last dangling reference
continue;
}
$allParts[$msgIndex] = $part;
}
unset($part);// Remove the last dangling reference
foreach ($allParts as $parNbr => &$part) {
$att_part = $this->scanAttachmentPart($part, $parNbr);
if ($att_part) {
++$this->attachments_cnt;
if (!$this->attachment) {
$this->attachment = new MailAttachment($this->conn, $att_part);
}
}
}
unset($part);// Remove the last dangling reference
}
}
/**
* @param string $parNbr
* @return array|null
*/
private function scanAttachmentPart(&$part, $parNbr)
{
$filename = null;
if ($part->ifdparameters) {
$filename = $this->getAttribute($part->dparameters, 'filename');
}
if (empty($filename) && $part->ifparameters) {
$filename = $this->getAttribute($part->parameters, 'name');
}
if (empty($filename)) {
return null;
}
return [
'filename' => imap_utf8($filename),
'bytes' => isset($part->bytes) ? $part->bytes : -1,
'number' => $parNbr,
'mnumber' => $this->number,
'encoding' => $part->encoding
];
}
private function getAttribute(&$params, $name)
{
// need to check all objects as imap_fetchstructure
// returns multiple objects with the same attribute name,
// but first entry contains a truncated value
$value = null;
foreach ($params as &$obj) {
if (strcasecmp($obj->attribute, $name) === 0) {
$value = $obj->value;
}
}
return $value;
}
}
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