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<?php

use Automattic\Jetpack\Constants;
defined('ABSPATH') || exit;
if (!class_exists('WC_Background_Process', false)) {
    include_once dirname(__FILE__) . '/abstracts/class-wc-background-process.php';
}
class WC_Background_Emailer extends WC_Background_Process
{
    public function __construct()
    {
        $this->prefix = 'wp_' . get_current_blog_id();
        $this->action = 'wc_emailer';
        add_action('shutdown', array($this, 'dispatch_queue'), 100);
        parent::__construct();
    }
    protected function schedule_event()
    {
        if (!wp_next_scheduled($this->cron_hook_identifier)) {
            wp_schedule_event(time() + 10, $this->cron_interval_identifier, $this->cron_hook_identifier);
        }
    }
    protected function task($callback)
    {
        if (isset($callback['filter'], $callback['args'])) {
            try {
                WC_Emails::send_queued_transactional_email($callback['filter'], $callback['args']);
            } catch (Exception $e) {
                if (Constants::is_true('WP_DEBUG')) {
                    trigger_error('Transactional email triggered fatal error for callback ' . esc_html($callback['filter']), E_USER_WARNING);
                }
            }
        }
        return false;
    }
    protected function close_http_connection()
    {
        if (session_id()) {
            session_write_close();
        }
        wc_set_time_limit(0);
        if (is_callable('fastcgi_finish_request')) {
            fastcgi_finish_request();
        } else {
            if (!headers_sent()) {
                header('Connection: close');
            }
            @ob_end_flush();
            flush();
        }
    }
    public function dispatch_queue()
    {
        if (!empty($this->data)) {
            $this->close_http_connection();
            $this->save()->dispatch();
        }
    }
    protected function get_post_args()
    {
        if (property_exists($this, 'post_args')) {
            return $this->post_args;
        }
        $cookies = array();
        foreach ($_COOKIE as $name => $value) {
            if ('PHPSESSID' === $name) {
                continue;
            }
            $cookies[] = new WP_Http_Cookie(array('name' => $name, 'value' => $value));
        }
        return array('timeout' => 0.01, 'blocking' => false, 'body' => $this->data, 'cookies' => $cookies, 'sslverify' => apply_filters('https_local_ssl_verify', false));
    }
    protected function handle()
    {
        $this->lock_process();
        do {
            $batch = $this->get_batch();
            if (empty($batch->data)) {
                break;
            }
            foreach ($batch->data as $key => $value) {
                $task = $this->task($value);
                if (false !== $task) {
                    $batch->data[$key] = $task;
                } else {
                    unset($batch->data[$key]);
                }
                $this->update($batch->key, $batch->data);
                if ($this->time_exceeded() || $this->memory_exceeded()) {
                    break;
                }
            }
            if (empty($batch->data)) {
                $this->delete($batch->key);
            }
        } while (!$this->time_exceeded() && !$this->memory_exceeded() && !$this->is_queue_empty());
        $this->unlock_process();
        if (!$this->is_queue_empty()) {
            $this->dispatch();
        } else {
            $this->complete();
        }
    }
}