| 1 |
<?php |
| 2 |
|
| 3 |
/** |
| 4 |
* Plugin Name: Mail Queue |
| 5 |
* Plugin URI: https://www.webdesign-muenchen.de/wordpress-plugin-mail-queue/ |
| 6 |
* Description: Take Control and improve Security of wp_mail(). Queue outgoing emails, log their sendings and get alerted, if your website wants to send more emails than usual. |
| 7 |
* Version: 1.3 |
| 8 |
* Requires at least: 5.9 |
| 9 |
* Requires PHP: 7.2 |
| 10 |
* Author: WDM |
| 11 |
* Author URI: https://www.webdesign-muenchen.de |
| 12 |
* License: GPLv3 or later |
| 13 |
* License URI: https://www.gnu.org/licenses/gpl-3.0.html |
| 14 |
*/ |
| 15 |
|
| 16 |
if (!defined('ABSPATH')) { exit; } |
| 17 |
|
| 18 |
|
| 19 |
/* *************************************************************** |
| 20 |
PLUGIN DEFAULT SETTINGS |
| 21 |
**************************************************************** */ |
| 22 |
function wdm_wpma_get_settings() { |
| 23 |
$defaults = array( |
| 24 |
'enabled' => '0', |
| 25 |
'alert_enabled' => '0', |
| 26 |
'email' => get_option('admin_email'), |
| 27 |
'email_amount' => '10', |
| 28 |
'queue_amount' => '1', |
| 29 |
'queue_interval' => '5', |
| 30 |
'queue_interval_unit' => 'minutes', |
| 31 |
'clear_queue' => '14', |
| 32 |
'tableName' => 'mail_queue', |
| 33 |
'triggercount' => 0, |
| 34 |
); |
| 35 |
$args = get_option('wdm_wpma_settings'); |
| 36 |
$options = wp_parse_args($args,$defaults); |
| 37 |
|
| 38 |
if ($options['queue_interval_unit'] == 'seconds') { |
| 39 |
$options['queue_interval'] = intval($options['queue_interval']); |
| 40 |
if ($options['queue_interval'] < 10) { $options['queue_interval'] = 10; } // Minimum Interval 10 Seconds |
| 41 |
} else { |
| 42 |
$options['queue_interval'] = intval($options['queue_interval']) * 60; |
| 43 |
} |
| 44 |
|
| 45 |
$options['clear_queue'] = intval($options['clear_queue']) * 24; |
| 46 |
return $options; |
| 47 |
} |
| 48 |
|
| 49 |
|
| 50 |
|
| 51 |
|
| 52 |
|
| 53 |
/* *************************************************************** |
| 54 |
Overwrite wp_mail() if Plugin enabled and no Cron is running |
| 55 |
**************************************************************** */ |
| 56 |
$wdm_wpma_mailid = 0; |
| 57 |
$wdm_wpma_options = wdm_wpma_get_settings(); // Get Settings |
| 58 |
|
| 59 |
if ($wdm_wpma_options['enabled'] == '1' && wp_doing_cron() == false) { |
| 60 |
add_filter( 'pre_wp_mail' , 'wdm_wpma_prewpmail', 10, 2); |
| 61 |
} |
| 62 |
|
| 63 |
// pre WP Mail Filter |
| 64 |
function wdm_wpma_prewpmail($null, $atts) { |
| 65 |
|
| 66 |
global $wpdb, $wdm_wpma_options; |
| 67 |
|
| 68 |
// Mail Variables |
| 69 |
$to = $atts['to']; |
| 70 |
$subject = $atts['subject']; |
| 71 |
$message = $atts['message']; |
| 72 |
$headers = $atts['headers']; |
| 73 |
$attachments = $atts['attachments']; |
| 74 |
$status = 'queue'; |
| 75 |
|
| 76 |
// Instant Sending or Prio Mail? |
| 77 |
if (isset($headers) && is_array($headers) && count($headers) > 0) { |
| 78 |
foreach($headers as $index => $val) { |
| 79 |
if (preg_match("#^X-Mail-Queue-Prio: +Instant *$#i",$val)) { |
| 80 |
array_splice($headers,$index,1); |
| 81 |
$status = 'instant'; |
| 82 |
break; |
| 83 |
} else if (preg_match("#^X-Mail-Queue-Prio: +High *$#i",$val)) { |
| 84 |
array_splice($headers,$index,1); |
| 85 |
$status = 'high'; |
| 86 |
break; |
| 87 |
} |
| 88 |
} |
| 89 |
} |
| 90 |
|
| 91 |
// Write email in Queue |
| 92 |
$tableName = $wpdb->prefix.$wdm_wpma_options['tableName']; |
| 93 |
$data = array( |
| 94 |
'timestamp'=> current_time('mysql',false), |
| 95 |
'recipient'=> maybe_serialize($to), |
| 96 |
'subject'=> $subject, |
| 97 |
'message'=> $message, |
| 98 |
'status' => $status, |
| 99 |
'attachments' => '' |
| 100 |
); |
| 101 |
if (isset($headers) && $headers) { $data['headers'] = maybe_serialize($headers); } |
| 102 |
|
| 103 |
// store attachments in /attachments/ Folder, to address them later |
| 104 |
if (isset($attachments) && $attachments && $attachments != '') { |
| 105 |
|
| 106 |
$subfolder = time().'-'.rand(0,999999); |
| 107 |
$foldercreated = wp_mkdir_p(plugin_dir_path(__FILE__).'attachments/'.$subfolder); |
| 108 |
if (!$foldercreated) { |
| 109 |
error_log('Could not create Subfolder for Email attachment'); |
| 110 |
$data['info'] = 'Error: Could not store attachments'; |
| 111 |
} else { |
| 112 |
if (!is_array($attachments)) { $attachments = array($attachments); } |
| 113 |
$newattachments = array(); |
| 114 |
global $wp_filesystem; |
| 115 |
if ( ! is_a( $wp_filesystem, 'WP_Filesystem_Base') ){ |
| 116 |
include_once(ABSPATH . 'wp-admin/includes/file.php'); |
| 117 |
WP_Filesystem(); |
| 118 |
} |
| 119 |
foreach($attachments as $item) { |
| 120 |
$newfile = plugin_dir_path(__FILE__).'attachments/'.$subfolder.'/'.basename($item); |
| 121 |
$wp_filesystem->copy($item,$newfile); |
| 122 |
array_push($newattachments,$newfile); |
| 123 |
} |
| 124 |
$data['attachments'] = maybe_serialize($newattachments); |
| 125 |
} |
| 126 |
} |
| 127 |
$wpdb->insert($tableName,$data); |
| 128 |
|
| 129 |
if ($status == 'instant') { |
| 130 |
return null; |
| 131 |
} else { |
| 132 |
// Fake Submit by returning 'True' |
| 133 |
return true; |
| 134 |
} |
| 135 |
|
| 136 |
} |
| 137 |
|
| 138 |
|
| 139 |
|
| 140 |
// show wp_mail() errors |
| 141 |
function wdm_wpma_mail_failed( $wp_error ) { |
| 142 |
global $wpdb,$wdm_wpma_options,$wdm_wpma_mailid; |
| 143 |
if (isset($wdm_wpma_mailid) && $wdm_wpma_mailid != 0) { |
| 144 |
$tableName = $wpdb->prefix.$wdm_wpma_options['tableName']; |
| 145 |
$wpMailFailedError = isset( $wp_error->errors ) && isset( $wp_error->errors['wp_mail_failed'][0] ) ? implode( '; ', $wp_error->errors['wp_mail_failed'] ) : '<em>Unknown</em>'; |
| 146 |
$wpdb->update($tableName,array('timestamp'=>current_time('mysql',false),'status'=>'error', 'info'=>$wpMailFailedError),array('id'=>intval($wdm_wpma_mailid)),array('%s', '%s', '%s'),'%d'); |
| 147 |
} |
| 148 |
return error_log(print_r($wp_error, true)); |
| 149 |
} |
| 150 |
add_action('wp_mail_failed','wdm_wpma_mail_failed',10,1); |
| 151 |
|
| 152 |
|
| 153 |
|
| 154 |
|
| 155 |
/* *************************************************************** |
| 156 |
CRON |
| 157 |
**************************************************************** */ |
| 158 |
function wdm_wpma_search_mail_from_queue() { |
| 159 |
|
| 160 |
global $wpdb,$wdm_wpma_options,$wdm_wpma_mailid; |
| 161 |
if ($wdm_wpma_options['enabled'] != '1') { return; } |
| 162 |
$tableName = $wpdb->prefix.$wdm_wpma_options['tableName']; |
| 163 |
|
| 164 |
// Triggercount to avoid multiple runs |
| 165 |
$wdm_wpma_options['triggercount']++; |
| 166 |
if ($wdm_wpma_options['triggercount'] > 1) { return; } |
| 167 |
|
| 168 |
// Mails in Queue? |
| 169 |
$mailjobs = $wpdb->get_results("SELECT * FROM `$tableName` WHERE `status` = 'queue' ORDER BY `id`",'ARRAY_A'); |
| 170 |
$mailsInQueue = is_array($mailjobs) ? count($mailjobs) : 0; |
| 171 |
|
| 172 |
// Alert Admin, if too many mails in the Queue. |
| 173 |
if ($wdm_wpma_options['alert_enabled'] == '1' && $mailsInQueue > intval($wdm_wpma_options['email_amount'])) { |
| 174 |
|
| 175 |
// Last alerts older than 6 hours? |
| 176 |
$alerts = $wpdb->get_results("SELECT * FROM `$tableName` WHERE `status` = 'alert' AND `timestamp` > NOW() - INTERVAL 6 HOUR",'ARRAY_A'); |
| 177 |
|
| 178 |
// If no alerts, then send one |
| 179 |
if (!$alerts) { |
| 180 |
$alertMessage = 'Hi,'; |
| 181 |
$alertMessage .= "\n\n"; |
| 182 |
$alertMessage .= 'this is an important message from your WordPress website '.esc_url(get_option('siteurl')).'.'; |
| 183 |
$alertMessage .= "\n"; |
| 184 |
$alertMessage .= "\n".'The Mail Queue Plugin has detected that your website tries to send more emails than expected (currently '.$mailsInQueue.').'; |
| 185 |
$alertMessage .= "\n".'Please take a close look at the email queue, because it contains more messages than the specified limit.'; |
| 186 |
$alertMessage .= "\n"; |
| 187 |
$alertMessage .= "\n".'In case this is the usual amount of emails, you can adjust the threshold for alerts in the settings of your Mail Queue Plugin.'; |
| 188 |
$alertMessage .= "\n\n"; |
| 189 |
$alertMessage .= "-- "; |
| 190 |
$alertMessage .= "\n"; |
| 191 |
$alertMessage .= admin_url(); |
| 192 |
$alertSubject = '🔴 WordPress Mail Queue Alert - '.esc_html(get_option('blogname')); |
| 193 |
$data = array( |
| 194 |
'timestamp'=> current_time('mysql',false), |
| 195 |
'recipient'=> sanitize_email($wdm_wpma_options['email']), |
| 196 |
'subject' => $alertSubject, |
| 197 |
'message' => $alertMessage, |
| 198 |
'status' => 'alert', |
| 199 |
'info' => json_encode([ |
| 200 |
'in_queue' => strval( $mailsInQueue ), |
| 201 |
'email_amount' => intval($wdm_wpma_options['email_amount']), |
| 202 |
'queue_amount' => intval($wdm_wpma_options['queue_amount']), |
| 203 |
'queue_interval' => intval($wdm_wpma_options['queue_interval']), |
| 204 |
]), |
| 205 |
); |
| 206 |
$wpdb->insert($tableName,$data); |
| 207 |
wp_mail($wdm_wpma_options['email'],$alertSubject,$alertMessage); |
| 208 |
} |
| 209 |
|
| 210 |
} |
| 211 |
|
| 212 |
// Send Mails in Queue |
| 213 |
if ($mailsInQueue > 0) { |
| 214 |
$results = array_slice($mailjobs,0,intval($wdm_wpma_options['queue_amount'])); |
| 215 |
if ($results && count($results) > 0) { |
| 216 |
foreach($results as $index => $item) { |
| 217 |
if ($item['recipient'] && $item['recipient'] != '') { $to = maybe_unserialize($item['recipient']); } else { $to = $wdm_wpma_options['email']; $item['subject'] = 'ERROR // '.$item['subject']; } |
| 218 |
if ($item['headers'] && $item['headers'] != '') { $headers = maybe_unserialize($item['headers']); } else { $headers = ''; } |
| 219 |
if ($item['attachments'] && $item['attachments'] != '') { $attachments = maybe_unserialize($item['attachments']); } else { $attachments = ''; } |
| 220 |
$wdm_wpma_mailid = $item['id']; |
| 221 |
|
| 222 |
//$item['subject'] .= ' // Timestamp '.time().' // BlogID '.$wpdb->blogid.' // Cron '.wp_doing_cron().' // Resultscount '.count($results).' // Index '.$index; |
| 223 |
|
| 224 |
remove_filter('pre_wp_mail','wdm_wpma_prewpmail',10); |
| 225 |
$sendstatus = wp_mail($to,$item['subject'],$item['message'],$headers,$attachments); // Finally sends the email for real |
| 226 |
if ($sendstatus) { |
| 227 |
$wpdb->update($tableName,array('timestamp'=>current_time('mysql',false),'status'=>'sent'),array('id'=>$item['id']),'%s','%d'); |
| 228 |
} |
| 229 |
if (is_array($attachments)) { |
| 230 |
global $wp_filesystem; |
| 231 |
if ( ! is_a( $wp_filesystem, 'WP_Filesystem_Base') ){ |
| 232 |
include_once(ABSPATH . 'wp-admin/includes/file.php'); |
| 233 |
WP_Filesystem(); |
| 234 |
} |
| 235 |
$attachmentfolder = pathinfo($attachments[0]); |
| 236 |
$wp_filesystem->delete($attachmentfolder['dirname'],true,'d'); |
| 237 |
} |
| 238 |
} |
| 239 |
} |
| 240 |
} |
| 241 |
|
| 242 |
// Delete old logs |
| 243 |
$wpdb->query("DELETE FROM `$tableName` WHERE `status` != 'queue' AND `timestamp` < NOW() - INTERVAL ".esc_sql($wdm_wpma_options['clear_queue'])." HOUR"); |
| 244 |
|
| 245 |
} |
| 246 |
add_action('wp_mail_queue_hook','wdm_wpma_search_mail_from_queue'); |
| 247 |
|
| 248 |
// Custom Cron Interval |
| 249 |
function wdm_wpma_cron_interval( $schedules ) { |
| 250 |
global $wdm_wpma_options; |
| 251 |
$schedules['wdm_wpma_interval'] = array( |
| 252 |
'interval' => $wdm_wpma_options['queue_interval'], |
| 253 |
'display' => esc_html__('WP Mail Queue'), ); |
| 254 |
return $schedules; |
| 255 |
} |
| 256 |
add_filter('cron_schedules','wdm_wpma_cron_interval'); |
| 257 |
|
| 258 |
// Set or Remove Cron |
| 259 |
$next_wpma_cron_timestamp = wp_next_scheduled('wp_mail_queue_hook'); |
| 260 |
if ($next_wpma_cron_timestamp && $wdm_wpma_options['enabled'] != '1') { |
| 261 |
wp_unschedule_event($next_wpma_cron_timestamp,'wp_mail_queue_hook'); |
| 262 |
} else if (!$next_wpma_cron_timestamp && $wdm_wpma_options['enabled'] == '1') { |
| 263 |
wp_schedule_event(time(),'wdm_wpma_interval','wp_mail_queue_hook'); |
| 264 |
} |
| 265 |
|
| 266 |
|
| 267 |
|
| 268 |
/* *************************************************************** |
| 269 |
Install/Uninstall |
| 270 |
**************************************************************** */ |
| 271 |
|
| 272 |
|
| 273 |
/* Delete plugin options and database table */ |
| 274 |
function wdm_wpma_uninstall () { |
| 275 |
global $wpdb; |
| 276 |
|
| 277 |
$optionName = 'wdm_wpma_settings'; |
| 278 |
delete_option( $optionName ); |
| 279 |
|
| 280 |
$tableName = $wpdb->prefix.'mail_queue'; |
| 281 |
$wpdb->query( "DROP TABLE IF EXISTS $tableName" ); |
| 282 |
} |
| 283 |
|
| 284 |
/* Delete Cron when Plugin deactivated */ |
| 285 |
function wdm_wpma_deactivate() { |
| 286 |
wp_clear_scheduled_hook( 'wp_mail_queue_hook' ); |
| 287 |
} |
| 288 |
|
| 289 |
/* Create MySQL Table on Activation: https://codex.wordpress.org/Creating_Tables_with_Plugins */ |
| 290 |
function wdm_wpma_installDatabaseTables() { |
| 291 |
global $wpdb; |
| 292 |
|
| 293 |
$tableName = $wpdb->prefix.'mail_queue'; |
| 294 |
|
| 295 |
$charset_collate = $wpdb->get_charset_collate(); |
| 296 |
|
| 297 |
$sql = "CREATE TABLE $tableName ( |
| 298 |
id mediumint(9) NOT NULL AUTO_INCREMENT, |
| 299 |
timestamp TIMESTAMP NOT NULL, |
| 300 |
status varchar(55) DEFAULT '' NOT NULL, |
| 301 |
recipient varchar(255) DEFAULT '' NOT NULL, |
| 302 |
subject varchar(255) DEFAULT '' NOT NULL, |
| 303 |
message text NOT NULL, |
| 304 |
headers text NOT NULL, |
| 305 |
attachments text NOT NULL, |
| 306 |
info varchar(255) DEFAULT '' NOT NULL, |
| 307 |
PRIMARY KEY (id) |
| 308 |
) $charset_collate;"; |
| 309 |
|
| 310 |
require_once( ABSPATH . 'wp-admin/includes/upgrade.php' ); |
| 311 |
dbDelta( $sql ); |
| 312 |
|
| 313 |
register_uninstall_hook( __FILE__, 'wdm_wpma_uninstall' ); |
| 314 |
|
| 315 |
register_deactivation_hook( __FILE__, 'wdm_wpma_deactivate' ); |
| 316 |
|
| 317 |
} |
| 318 |
register_activation_hook( __FILE__, 'wdm_wpma_installDatabaseTables' ); |
| 319 |
|
| 320 |
|
| 321 |
/* *************************************************************** |
| 322 |
Options Page |
| 323 |
**************************************************************** */ |
| 324 |
if (is_admin()) { |
| 325 |
require_once( plugin_dir_path( __FILE__ ) . 'mail-queue-options.php' ); |
| 326 |
} |
| 327 |
|
