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- <?php
- /**
- * Insipid
- * Personal web-bookmark-system
- *
- * Copyright 2016-2022 Johannes Keßler
- *
- * Development starting from 2011: Johannes Keßler
- * https://www.bananas-playground.net/projekt/insipid/
- *
- * creator:
- * Luke Reeves <luke@neuro-tech.net>
- *
- * 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, or
- * (at your option) any later version.
- *
- * 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/gpl-3.0.
- *
- */
- /**
- * a static helper class for email importer
- */
- class EmailImportHelper {
- /**
- * extract from given string (eg. email body) any links we want to add
- * should be in the right format. See documentation
- * return an array with links and the infos about them
- *
- * @param string $string
- * @return array $ret
- */
- static function extractEmailLinks(string $string): array {
- $ret = array();
- #this matches a valid URL. An URL with | is still valid...
- $urlpattern = '#(?i)\b((?:[a-z][\w-]+:(?:/{1,3}|[a-z0-9%])|www\d{0,3}[.]|[a-z0-9.\-]+[.][a-z]{2,4}/)(?:[^\s()<>]+|\(([^\s()<>]+|(\([^\s()<>]+\)))*\))+(?:\(([^\s()<>]+|(\([^\s()<>]+\)))*\)|[^\s`!()\[\]{};:\'".,<>?«»“”‘’]))#';
- preg_match_all($urlpattern, $string, $matches);
- if(isset($matches[0]) && !empty($matches[0])) {
- foreach($matches[0] as $match) {
- $ret[md5($match)] = $match;
- }
- }
- return $ret;
- }
- /**
- * Check if given from is in the valid EMAIL_REPLY_BACK_VALID
- *
- * @param string $replyTo
- * @return bool
- */
- static function canSendReplyTo(string $replyTo): bool {
- if(defined("EMAIL_REPORT_BACK") && EMAIL_REPORT_BACK === true
- && defined("EMAIL_REPLY_BACK_VALID") && !empty(EMAIL_REPLY_BACK_VALID)) {
- if(strstr($replyTo,EMAIL_REPLY_BACK_VALID)) {
- return true;
- }
- }
- return false;
- }
- /**
- * check if given email header identify the email as a autoreply
- * if so, you should do nothing with this email
- *
- * based an some code from:
- * https://github.com/r-a-y/bp-reply-by-email
- * https://arp242.net/autoreply.html
- * https://github.com/jpmckinney/multi_mail/wiki/Detecting-autoresponders
- * https://github.com/Exim/exim/wiki/EximAutoReply#Router-1
- * https://stackoverflow.com/questions/6317714/apache-camel-mail-to-identify-auto-generated-messages/6383675#6383675
- *
- * this does not really quality check the values. It just checks if some headers are set
- *
- * @param array $headers complete email headers as an array
- * @return bool
- */
- static function isAutoReplyMessage(array $headers): bool {
- if(empty($headers)) {
- return true;
- }
- foreach($headers as $k=>$v) {
- $headers[strtolower($k)] = $v;
- }
- if(isset($headers['auto-submitted'])
- || isset($headers['x-autoreply'])
- || isset($headers['x-autorespond'])
- || isset($headers['x-auto-response-suppress'])
- || isset($headers['list-id'])
- || isset($headers['list-subscribe'])
- || isset($headers['list-archive'])
- || isset($headers['list-help'])
- || isset($headers['list-post'])
- || isset($headers['mailing-list'])
- || isset($headers['x-mailing-list'])
- || isset($headers['list-unsubscribe'])
- || isset($headers['list-owner'])
- || isset($headers['x-autoreply-from'])
- || isset($headers['x-mail-autoreply'])
- || isset($headers['x-mc-system'])
- || isset($headers['x-fc-machinegenerated'])
- || isset($headers['x-facebook-notify'])
- || isset($headers['x-autogenerated'])
- || isset($headers['feedback-id'])
- || isset($headers['x-msfbl'])
- || isset($headers['x-loop'])
- || isset($headers['x-cron-env'])
- || isset($headers['x-ebay-mailtracker'])
- || (isset($headers['precedence']) && $headers['precedence'] == "list")
- || (isset($headers['x-precedence']) && $headers['x-precedence'] == "list")
- || (isset($headers['precedence']) && $headers['precedence'] == "auto_reply")
- || (isset($headers['x-precedence']) && $headers['x-precedence'] == "auto_reply")
- || (isset($headers['x-post-messageclass']) && $headers['x-post-messageclass'] == "9; Autoresponder")
- || (isset($headers['delivered-to']) && $headers['delivered-to'] == "Autoresponder")
- || (isset($headers['x-spam-flag']) && $headers['x-spam-flag'] == "yes")
- || (isset($headers['x-spam-status']) && $headers['x-spam-status'] == "yes")
- ) {
- return true;
- }
- $_autoreplymail = array(
- "reply", "mailer-daemon", "delivery", "owner-", "request-", "bounce", "-confirm", "-errors", "donotreply",
- "postmaster", "daemon", "listserv", "majordom", "mailman", "mdaemon", "root"
- );
- foreach ($_autoreplymail as $entry) {
- if(
- (isset($headers['from']) && stripos($headers['from'],$entry))
- || (isset($headers['reply-to']) && stripos($headers['reply-to'],$entry))
- || (isset($headers['return-path']) &&stripos($headers['return-path'],$entry))
- ) {
- return true;
- }
- }
- return false;
- }
- }
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