public function schedule()
{
if ($this->is_scheduled()) {
return new WP_Error('hm_backdrop_scheduled', __('Task is already scheduled to run', 'hm_backdrop'));
}
$data = array('callback' => $this->callback, 'params' => $this->params);
WP_Temporary::set('hm_backdrop-' . $this->key, $data, 5 * MINUTE_IN_SECONDS);
add_action('shutdown', array($this, 'spawn_server'));
return true;
}
/**
* Process items from queue.
*
* By default, every six minutes send ten emails.
*
* @since 1.0
* @access public
*/
public function process_queue()
{
// Look for existing addresses
$existing = $this->get_queue();
if (!is_array($existing) && $existing) {
return false;
}
// Check how much emails are already sent in this interval
$sent = WP_Temporary::get('simple_email_queue_sent');
if (!$sent) {
$sent = 0;
}
/*
* Maximum number of allowed email to send
* is difference between maximum allowed and
* number of sent emails in this interval.
*/
$max = $this->max() - $sent;
$num_sent = 0;
foreach ($existing as $key => $value) {
if ($num_sent >= $max) {
break;
}
$email_to = key($value);
$email_key = $value[$email_to];
$this->send_email($email_to, $email_key);
// Remove item from array
unset($existing[$key]);
// Increase number of sent emails
$num_sent++;
}
// Save temporary that stores existing of temporary based on existence mail in queue
if ($existing) {
WP_Temporary::set('simple_email_queue_exist', 1, WEEK_IN_SECONDS);
} else {
WP_Temporary::delete('simple_email_queue_exist');
}
// Save new queue
$this->set_queue($existing);
// Save new number of sent emails in this interval
$new_sent = $sent + $num_sent;
WP_Temporary::update('simple_email_queue_sent', $new_sent, $this->interval());
}
/**
* Update the value of a temporary with existing timeout.
*
* You do not need to serialize values. If the value needs to be serialized, then
* it will be serialized before it is updated.
*
* @since 1.0.0
* @access public
*
* @param string $temporary Temporary name. Expected to not be SQL-escaped. Must be
* 45 characters or fewer in length.
* @param mixed $value Temporary value. Must be serializable if non-scalar.
* Expected to not be SQL-escaped.
* @param int $expiration Optional. Time until expiration in seconds. Default 0.
* @return bool False if value was not updated and true if value was updated.
*/
public static function update($temporary, $value, $expiration = 0)
{
/**
* Filter a specific temporary before its value is updated.
*
* The dynamic portion of the hook name, `$temporary`, refers to the temporary name.
*
* @since 1.0.0
*
* @param mixed $value New value of temporary.
* @param string $temporary Temporary name.
*/
$value = apply_filters('pre_update_temporary_' . $temporary, $value, $temporary);
$temporary_option = '_temporary_' . $temporary;
// If temporary doesn't exist, create new one,
// otherwise update it with new value
if (false === WP_Temporary::get($temporary)) {
$result = WP_Temporary::set($temporary, $value, $expiration);
} else {
$temporary_option = '_temporary_' . $temporary;
$result = update_option($temporary_option, $value);
}
if ($result) {
/**
* Fires after the value for a specific temporary has been updated.
*
* The dynamic portion of the hook name, `$temporary`, refers to the temporary name.
*
* @since 1.0.0
*
* @param mixed $value Temporary value.
* @param int $expiration Time until expiration in seconds. Default 0.
* @param string $temporary Temporary name.
*/
do_action('update_temporary_' . $temporary, $value, $expiration, $temporary);
/**
* Fires after the value for a temporary has been updated.
*
* @since 1.0.0
*
* @param string $temporary The name of the temporary.
* @param mixed $value Temporary value.
* @param int $expiration Time until expiration in seconds. Default 0.
*/
do_action('updated_temporary', $temporary, $value, $expiration);
}
return $result;
}
