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186
includes/class-wc-background-emailer.php
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186
includes/class-wc-background-emailer.php
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<?php
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/**
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* Background Emailer
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*
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* @version 3.0.1
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* @package WooCommerce\Classes
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*/
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use Automattic\Jetpack\Constants;
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defined( 'ABSPATH' ) || exit;
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if ( ! class_exists( 'WC_Background_Process', false ) ) {
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include_once dirname( __FILE__ ) . '/abstracts/class-wc-background-process.php';
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}
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/**
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* WC_Background_Emailer Class.
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*/
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class WC_Background_Emailer extends WC_Background_Process {
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/**
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* Initiate new background process.
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*/
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public function __construct() {
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// Uses unique prefix per blog so each blog has separate queue.
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$this->prefix = 'wp_' . get_current_blog_id();
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$this->action = 'wc_emailer';
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// Dispatch queue after shutdown.
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add_action( 'shutdown', array( $this, 'dispatch_queue' ), 100 );
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parent::__construct();
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}
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/**
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* Schedule fallback event.
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*/
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protected function schedule_event() {
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if ( ! wp_next_scheduled( $this->cron_hook_identifier ) ) {
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wp_schedule_event( time() + 10, $this->cron_interval_identifier, $this->cron_hook_identifier );
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}
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}
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/**
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* Task
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*
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* Override this method to perform any actions required on each
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* queue item. Return the modified item for further processing
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* in the next pass through. Or, return false to remove the
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* item from the queue.
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*
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* @param array $callback Update callback function.
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* @return mixed
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*/
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protected function task( $callback ) {
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if ( isset( $callback['filter'], $callback['args'] ) ) {
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try {
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WC_Emails::send_queued_transactional_email( $callback['filter'], $callback['args'] );
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} catch ( Exception $e ) {
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if ( Constants::is_true( 'WP_DEBUG' ) ) {
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trigger_error( 'Transactional email triggered fatal error for callback ' . esc_html( $callback['filter'] ), E_USER_WARNING ); // phpcs:ignore WordPress.PHP.DevelopmentFunctions.error_log_trigger_error
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}
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}
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}
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return false;
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}
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/**
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* Finishes replying to the client, but keeps the process running for further (async) code execution.
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*
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* @see https://core.trac.wordpress.org/ticket/41358 .
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*/
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protected function close_http_connection() {
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// Only 1 PHP process can access a session object at a time, close this so the next request isn't kept waiting.
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// @codingStandardsIgnoreStart
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if ( session_id() ) {
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session_write_close();
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}
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// @codingStandardsIgnoreEnd
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wc_set_time_limit( 0 );
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// fastcgi_finish_request is the cleanest way to send the response and keep the script running, but not every server has it.
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if ( is_callable( 'fastcgi_finish_request' ) ) {
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fastcgi_finish_request();
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} else {
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// Fallback: send headers and flush buffers.
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if ( ! headers_sent() ) {
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header( 'Connection: close' );
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}
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@ob_end_flush(); // phpcs:ignore Generic.PHP.NoSilencedErrors.Discouraged
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flush();
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}
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}
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/**
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* Save and run queue.
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*/
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public function dispatch_queue() {
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if ( ! empty( $this->data ) ) {
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$this->close_http_connection();
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$this->save()->dispatch();
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}
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}
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/**
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* Get post args
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*
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* @return array
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*/
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protected function get_post_args() {
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if ( property_exists( $this, 'post_args' ) ) {
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return $this->post_args;
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}
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// Pass cookies through with the request so nonces function.
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$cookies = array();
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foreach ( $_COOKIE as $name => $value ) { // WPCS: input var ok.
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if ( 'PHPSESSID' === $name ) {
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continue;
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}
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$cookies[] = new WP_Http_Cookie( array(
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'name' => $name,
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'value' => $value,
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) );
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}
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return array(
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'timeout' => 0.01,
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'blocking' => false,
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'body' => $this->data,
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'cookies' => $cookies,
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'sslverify' => apply_filters( 'https_local_ssl_verify', false ),
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);
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}
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/**
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* Handle
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*
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* Pass each queue item to the task handler, while remaining
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* within server memory and time limit constraints.
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*/
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protected function handle() {
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$this->lock_process();
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do {
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$batch = $this->get_batch();
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if ( empty( $batch->data ) ) {
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break;
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}
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foreach ( $batch->data as $key => $value ) {
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$task = $this->task( $value );
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if ( false !== $task ) {
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$batch->data[ $key ] = $task;
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} else {
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unset( $batch->data[ $key ] );
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}
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// Update batch before sending more to prevent duplicate email possibility.
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$this->update( $batch->key, $batch->data );
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if ( $this->time_exceeded() || $this->memory_exceeded() ) {
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// Batch limits reached.
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break;
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}
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}
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if ( empty( $batch->data ) ) {
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$this->delete( $batch->key );
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}
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} while ( ! $this->time_exceeded() && ! $this->memory_exceeded() && ! $this->is_queue_empty() );
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$this->unlock_process();
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// Start next batch or complete process.
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if ( ! $this->is_queue_empty() ) {
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$this->dispatch();
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} else {
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$this->complete();
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}
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}
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}
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