function qa_mailing_perform_step()
{
require_once QA_INCLUDE_DIR . 'qa-db-users.php';
$lastuserid = qa_opt('mailing_last_userid');
if (strlen($lastuserid)) {
$thistime = time();
$lasttime = qa_opt('mailing_last_timestamp');
$perminute = qa_opt('mailing_per_minute');
if ($lasttime - $thistime > 60) {
// if it's been a while, we assume there hasn't been continuous mailing...
$lasttime = $thistime - 1;
} else {
// otherwise...
$lasttime = max($lasttime, $thistime - 6);
}
// ... don't do more than 6 seconds' worth
$count = min(floor(($thistime - $lasttime) * $perminute / 60), 100);
// don't do more than 100 messages at a time
if ($count > 0) {
qa_opt('mailing_last_timestamp', $thistime + 30);
// prevents a parallel call to qa_mailing_perform_step() from sending messages, unless we're very unlucky with timing (poor man's mutex)
$sentusers = 0;
$users = qa_db_users_get_mailing_next($lastuserid, $count);
if (count($users)) {
foreach ($users as $user) {
$lastuserid = max($lastuserid, $user['userid']);
}
qa_opt('mailing_last_userid', $lastuserid);
qa_opt('mailing_done_users', qa_opt('mailing_done_users') + count($users));
foreach ($users as $user) {
if (!($user['flags'] & QA_USER_FLAGS_NO_MAILINGS)) {
qa_mailing_send_one($user['userid'], $user['handle'], $user['email'], $user['emailcode']);
$sentusers++;
}
}
qa_opt('mailing_last_timestamp', $lasttime + $sentusers * 60 / $perminute);
// can be floating point result, based on number of mails actually sent
} else {
qa_mailing_stop();
}
}
}
}
} else {
$errors['avatar_default_show'] = qa_lang_sub('main/image_not_read', implode(', ', qa_gd_image_formats()));
}
}
}
}
}
// Mailings management
if ($adminsection == 'mailing') {
if (qa_clicked('domailingtest') || qa_clicked('domailingstart') || qa_clicked('domailingresume') || qa_clicked('domailingcancel')) {
if (!qa_check_form_security_code('admin/' . $adminsection, qa_post_text('code'))) {
$securityexpired = true;
} else {
if (qa_clicked('domailingtest')) {
$email = qa_get_logged_in_email();
if (qa_mailing_send_one(qa_get_logged_in_userid(), qa_get_logged_in_handle(), $email, qa_get_logged_in_user_field('emailcode'))) {
$formokhtml = qa_lang_html_sub('admin/test_sent_to_x', qa_html($email));
} else {
$formokhtml = qa_lang_html('main/general_error');
}
}
if (qa_clicked('domailingstart')) {
qa_mailing_start();
$startmailing = true;
}
if (qa_clicked('domailingresume')) {
$startmailing = true;
}
if (qa_clicked('domailingcancel')) {
qa_mailing_stop();
}
