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<?php
if ( ! defined( 'ABSPATH' ) ) {
exit; // Exit if accessed directly
}
/**
* WooCommerce Webhook class.
*
* This class handles storing and retrieving webhook data from the associated.
* `shop_webhook` custom post type, as well as delivery logs from the `webhook_delivery`.
* comment type.
*
* Webhooks are enqueued to their associated actions, delivered, and logged.
*
* @author WooThemes
* @category Webhooks
* @package WooCommerce/Webhooks
* @since 2.2
*/
class WC_Webhook {
/** @var int webhook ID (post ID) */
public $id;
/**
* Setup webhook & load post data.
*
* @since 2.2
* @param string|int $id
*/
public function __construct( $id ) {
$id = absint( $id );
if ( ! $id ) {
return;
}
$this->id = $id;
$this->post_data = get_post( $id );
}
/**
* Magic isset as a wrapper around metadata_exists().
*
* @since 2.2
* @param string $key
* @return bool true if $key isset, false otherwise
*/
public function __isset( $key ) {
if ( ! $this->id ) {
return false;
}
return metadata_exists( 'post', $this->id, '_' . $key );
}
/**
* Magic get, wraps get_post_meta() for all keys except $status.
*
* @since 2.2
* @param string $key
* @return mixed value
*/
public function __get( $key ) {
if ( 'status' === $key ) {
$value = $this->get_status();
} else {
$value = get_post_meta( $this->id, '_' . $key, true );
}
return $value;
}
/**
* Enqueue the hooks associated with the webhook.
*
* @since 2.2
*/
public function enqueue() {
$hooks = $this->get_hooks();
$url = $this->get_delivery_url();
if ( is_array( $hooks ) && ! empty( $url ) ) {
foreach ( $hooks as $hook ) {
add_action( $hook, array( $this, 'process' ) );
}
}
}
/**
* Process the webhook for delivery by verifying that it should be delivered.
* and scheduling the delivery (in the background by default, or immediately).
*
* @since 2.2
* @param mixed $arg the first argument provided from the associated hooks
*/
public function process( $arg ) {
// verify that webhook should be processed for delivery
if ( ! $this->should_deliver( $arg ) ) {
return;
}
// webhooks are processed in the background by default
// so as to avoid delays or failures in delivery from affecting the
// user who triggered it
if ( apply_filters( 'woocommerce_webhook_deliver_async', true, $this, $arg ) ) {
// deliver in background
wp_schedule_single_event( time(), 'woocommerce_deliver_webhook_async', array( $this->id, $arg ) );
} else {
// deliver immediately
$this->deliver( $arg );
}
}
/**
* Helper to check if the webhook should be delivered, as some hooks.
* (like `wp_trash_post`) will fire for every post type, not just ours.
*
* @since 2.2
* @param mixed $arg first hook argument
* @return bool true if webhook should be delivered, false otherwise
*/
private function should_deliver( $arg ) {
$should_deliver = true;
$current_action = current_action();
// only active webhooks can be delivered
if ( 'active' != $this->get_status() ) {
$should_deliver = false;
} elseif ( in_array( $current_action, array( 'delete_post', 'wp_trash_post', 'untrashed_post' ), true ) ) {
// Only deliver deleted/restored event for coupons, orders, and products.
if ( isset( $GLOBALS['post_type'] ) && ! in_array( $GLOBALS['post_type'], array( 'shop_coupon', 'shop_order', 'product' ) ) ) {
$should_deliver = false;
}
// Check if is delivering for the correct resource.
if ( isset( $GLOBALS['post_type'] ) && str_replace( 'shop_', '', $GLOBALS['post_type'] ) !== $this->get_resource() ) {
$should_deliver = false;
}
} elseif ( 'delete_user' == $current_action ) {
$user = get_userdata( absint( $arg ) );
// only deliver deleted customer event for users with customer role
if ( ! $user || ! in_array( 'customer', (array) $user->roles ) ) {
$should_deliver = false;
}
// check if the custom order type has chosen to exclude order webhooks from triggering along with its own webhooks.
} elseif ( 'order' == $this->get_resource() && ! in_array( get_post_type( absint( $arg ) ), wc_get_order_types( 'order-webhooks' ) ) ) {
$should_deliver = false;
} elseif ( 0 === strpos( $current_action, 'woocommerce_process_shop' ) || 0 === strpos( $current_action, 'woocommerce_process_product' ) ) {
// the `woocommerce_process_shop_*` and `woocommerce_process_product_*` hooks
// fire for create and update of products and orders, so check the post
// creation date to determine the actual event
$resource = get_post( absint( $arg ) );
// Drafts don't have post_date_gmt so calculate it here
$gmt_date = get_gmt_from_date( $resource->post_date );
// a resource is considered created when the hook is executed within 10 seconds of the post creation date
$resource_created = ( ( time() - 10 ) <= strtotime( $gmt_date ) );
if ( 'created' == $this->get_event() && ! $resource_created ) {
$should_deliver = false;
} elseif ( 'updated' == $this->get_event() && $resource_created ) {
$should_deliver = false;
}
}
/*
* Let other plugins intercept deliver for some messages queue like rabbit/zeromq
*/
return apply_filters( 'woocommerce_webhook_should_deliver', $should_deliver, $this, $arg );
}
/**
* Deliver the webhook payload using wp_safe_remote_request().
*
* @since 2.2
* @param mixed $arg First hook argument.
*/
public function deliver( $arg ) {
$payload = $this->build_payload( $arg );
// Setup request args.
$http_args = array(
'method' => 'POST',
'timeout' => MINUTE_IN_SECONDS,
'redirection' => 0,
'httpversion' => '1.0',
'blocking' => true,
'user-agent' => sprintf( 'WooCommerce/%s Hookshot (WordPress/%s)', WC_VERSION, $GLOBALS['wp_version'] ),
'body' => trim( json_encode( $payload ) ),
'headers' => array( 'Content-Type' => 'application/json' ),
'cookies' => array(),
);
$http_args = apply_filters( 'woocommerce_webhook_http_args', $http_args, $arg, $this->id );
// Add custom headers.
$http_args['headers']['X-WC-Webhook-Source'] = home_url( '/' ); // Since 2.6.0.
$http_args['headers']['X-WC-Webhook-Topic'] = $this->get_topic();
$http_args['headers']['X-WC-Webhook-Resource'] = $this->get_resource();
$http_args['headers']['X-WC-Webhook-Event'] = $this->get_event();
$http_args['headers']['X-WC-Webhook-Signature'] = $this->generate_signature( $http_args['body'] );
$http_args['headers']['X-WC-Webhook-ID'] = $this->id;
$http_args['headers']['X-WC-Webhook-Delivery-ID'] = $delivery_id = $this->get_new_delivery_id();
$start_time = microtime( true );
// Webhook away!
$response = wp_safe_remote_request( $this->get_delivery_url(), $http_args );
$duration = round( microtime( true ) - $start_time, 5 );
$this->log_delivery( $delivery_id, $http_args, $response, $duration );
do_action( 'woocommerce_webhook_delivery', $http_args, $response, $duration, $arg, $this->id );
}
/**
* Get Legacy API payload.
*
* @since 3.0.0
* @param string $resource Resource type.
* @param int $resource_id Resource ID.
* @param string $event Event type.
* @return array
*/
private function get_legacy_api_payload( $resource, $resource_id, $event ) {
// Include & load API classes.
WC()->api->includes();
WC()->api->register_resources( new WC_API_Server( '/' ) );
switch ( $resource ) {
case 'coupon' :
$payload = WC()->api->WC_API_Coupons->get_coupon( $resource_id );
break;
case 'customer' :
$payload = WC()->api->WC_API_Customers->get_customer( $resource_id );
break;
case 'order' :
$payload = WC()->api->WC_API_Orders->get_order( $resource_id, null, apply_filters( 'woocommerce_webhook_order_payload_filters', array() ) );
break;
case 'product' :
// Bulk and quick edit action hooks return a product object instead of an ID.
if ( 'updated' === $event && is_a( $resource_id, 'WC_Product' ) ) {
$resource_id = $resource_id->get_id();
}
$payload = WC()->api->WC_API_Products->get_product( $resource_id );
break;
// Custom topics include the first hook argument.
case 'action' :
$payload = array(
'action' => current( $this->get_hooks() ),
'arg' => $resource_id,
);
break;
default :
$payload = array();
break;
}
return $payload;
}
/**
* Get WP API integration payload.
*
* @since 3.0.0
* @param string $resource Resource type.
* @param int $resource_id Resource ID.
* @param string $event Event type.
* @return array
*/
private function get_wp_api_payload( $resource, $resource_id, $event ) {
$version_suffix = 'wp_api_v1' === $this->get_api_version() ? '_V1' : '';
switch ( $resource ) {
case 'coupon' :
case 'customer' :
case 'order' :
case 'product' :
$class = 'WC_REST_' . ucfirst( $resource ) . 's' . $version_suffix . '_Controller';
$request = new WP_REST_Request( 'GET' );
$controller = new $class;
// Bulk and quick edit action hooks return a product object instead of an ID.
if ( 'product' === $resource && 'updated' === $event && is_a( $resource_id, 'WC_Product' ) ) {
$resource_id = $resource_id->get_id();
}
$request->set_param( 'id', $resource_id );
$result = $controller->get_item( $request );
$payload = isset( $result->data ) ? $result->data : array();
break;
// Custom topics include the first hook argument.
case 'action' :
$payload = array(
'action' => current( $this->get_hooks() ),
'arg' => $resource_id,
);
break;
default :
$payload = array();
break;
}
return $payload;
}
/**
* Build the payload data for the webhook.
*
* @since 2.2
* @param mixed $resource_id first hook argument, typically the resource ID
* @return mixed payload data
*/
public function build_payload( $resource_id ) {
// build the payload with the same user context as the user who created
// the webhook -- this avoids permission errors as background processing
// runs with no user context
$current_user = get_current_user_id();
wp_set_current_user( $this->get_user_id() );
$resource = $this->get_resource();
$event = $this->get_event();
// If a resource has been deleted, just include the ID.
if ( 'deleted' == $event ) {
$payload = array(
'id' => $resource_id,
);
} else {
if ( in_array( $this->get_api_version(), array( 'wp_api_v1', 'wp_api_v2' ), true ) ) {
$payload = $this->get_wp_api_payload( $resource, $resource_id, $event );
} else {
$payload = $this->get_legacy_api_payload( $resource, $resource_id, $event );
}
}
// Restore the current user.
wp_set_current_user( $current_user );
return apply_filters( 'woocommerce_webhook_payload', $payload, $resource, $resource_id, $this->id );
}
/**
* Generate a base64-encoded HMAC-SHA256 signature of the payload body so the.
* recipient can verify the authenticity of the webhook. Note that the signature.
* is calculated after the body has already been encoded (JSON by default).
*
* @since 2.2
* @param string $payload payload data to hash
* @return string hash
*/
public function generate_signature( $payload ) {
$hash_algo = apply_filters( 'woocommerce_webhook_hash_algorithm', 'sha256', $payload, $this->id );
return base64_encode( hash_hmac( $hash_algo, $payload, $this->get_secret(), true ) );
}
/**
* Create a new comment for log the delivery request/response and.
* return the ID for inclusion in the webhook request.
*
* @since 2.2
* @return int delivery (comment) ID
*/
public function get_new_delivery_id() {
$comment_data = apply_filters( 'woocommerce_new_webhook_delivery_data', array(
'comment_author' => __( 'WooCommerce', 'woocommerce' ),
'comment_author_email' => sanitize_email( sprintf( '%s@%s', strtolower( __( 'WooCommerce', 'woocommerce' ) ), isset( $_SERVER['HTTP_HOST'] ) ? str_replace( 'www.', '', $_SERVER['HTTP_HOST'] ) : 'noreply.com' ) ),
'comment_post_ID' => $this->id,
'comment_agent' => 'WooCommerce Hookshot',
'comment_type' => 'webhook_delivery',
'comment_parent' => 0,
'comment_approved' => 1,
), $this->id );
$comment_id = wp_insert_comment( $comment_data );
return $comment_id;
}
/**
* Log the delivery request/response.
*
* @since 2.2
* @param int $delivery_id previously created comment ID
* @param array $request request data
* @param array|WP_Error $response response data
* @param float $duration request duration
*/
public function log_delivery( $delivery_id, $request, $response, $duration ) {
// save request data
add_comment_meta( $delivery_id, '_request_method', $request['method'] );
add_comment_meta( $delivery_id, '_request_headers', array_merge( array( 'User-Agent' => $request['user-agent'] ), $request['headers'] ) );
add_comment_meta( $delivery_id, '_request_body', wp_slash( $request['body'] ) );
// parse response
if ( is_wp_error( $response ) ) {
$response_code = $response->get_error_code();
$response_message = $response->get_error_message();
$response_headers = array();
$response_body = '';
} else {
$response_code = wp_remote_retrieve_response_code( $response );
$response_message = wp_remote_retrieve_response_message( $response );
$response_headers = wp_remote_retrieve_headers( $response );
$response_body = wp_remote_retrieve_body( $response );
}
// save response data
add_comment_meta( $delivery_id, '_response_code', $response_code );
add_comment_meta( $delivery_id, '_response_message', $response_message );
add_comment_meta( $delivery_id, '_response_headers', $response_headers );
add_comment_meta( $delivery_id, '_response_body', $response_body );
// save duration
add_comment_meta( $delivery_id, '_duration', $duration );
// set a summary for quick display
$args = array(
'comment_ID' => $delivery_id,
'comment_content' => sprintf( 'HTTP %s %s: %s', $response_code, $response_message, $response_body ),
);
wp_update_comment( $args );
// track failures
if ( intval( $response_code ) >= 200 && intval( $response_code ) < 300 ) {
delete_post_meta( $this->id, '_failure_count' );
} else {
$this->failed_delivery();
}
// keep the 25 most recent delivery logs
$log = wp_count_comments( $this->id );
if ( $log->total_comments > apply_filters( 'woocommerce_max_webhook_delivery_logs', 25 ) ) {
global $wpdb;
$comment_id = $wpdb->get_var( $wpdb->prepare( "SELECT comment_ID FROM {$wpdb->comments} WHERE comment_post_ID = %d ORDER BY comment_date_gmt ASC LIMIT 1", $this->id ) );
if ( $comment_id ) {
wp_delete_comment( $comment_id, true );
}
}
}
/**
* Track consecutive delivery failures and automatically disable the webhook.
* if more than 5 consecutive failures occur. A failure is defined as a.
* non-2xx response.
*
* @since 2.2
*/
private function failed_delivery() {
$failures = $this->get_failure_count();
if ( $failures > apply_filters( 'woocommerce_max_webhook_delivery_failures', 5 ) ) {
$this->update_status( 'disabled' );
} else {
update_post_meta( $this->id, '_failure_count', ++$failures );
}
}
/**
* Get the delivery logs for this webhook.
*
* @since 2.2
* @return array
*/
public function get_delivery_logs() {
$args = array(
'post_id' => $this->id,
'status' => 'approve',
'type' => 'webhook_delivery',
);
remove_filter( 'comments_clauses', array( 'WC_Comments', 'exclude_webhook_comments' ), 10, 1 );
$logs = get_comments( $args );
add_filter( 'comments_clauses', array( 'WC_Comments', 'exclude_webhook_comments' ), 10, 1 );
$delivery_logs = array();
foreach ( $logs as $log ) {
$log = $this->get_delivery_log( $log->comment_ID );
$delivery_logs[] = ( ! empty( $log ) ? $log : array() );
}
return $delivery_logs;
}
/**
* Get the delivery log specified by the ID. The delivery log includes:
*
* + duration
* + summary
* + request method/url
* + request headers/body
* + response code/message/headers/body
*
* @since 2.2
* @param int $delivery_id
* @return bool|array false if invalid delivery ID, array of log data otherwise
*/
public function get_delivery_log( $delivery_id ) {
$log = get_comment( $delivery_id );
// valid comment and ensure delivery log belongs to this webhook
if ( is_null( $log ) || $log->comment_post_ID != $this->id ) {
return false;
}
$delivery_log = array(
'id' => intval( $delivery_id ),
'duration' => get_comment_meta( $delivery_id, '_duration', true ),
'summary' => $log->comment_content,
'request_method' => get_comment_meta( $delivery_id, '_request_method', true ),
'request_url' => $this->get_delivery_url(),
'request_headers' => get_comment_meta( $delivery_id, '_request_headers', true ),
'request_body' => get_comment_meta( $delivery_id, '_request_body', true ),
'response_code' => get_comment_meta( $delivery_id, '_response_code', true ),
'response_message' => get_comment_meta( $delivery_id, '_response_message', true ),
'response_headers' => get_comment_meta( $delivery_id, '_response_headers', true ),
'response_body' => get_comment_meta( $delivery_id, '_response_body', true ),
'comment' => $log,
);
return apply_filters( 'woocommerce_webhook_delivery_log', $delivery_log, $delivery_id, $this->id );
}
/**
* Set the webhook topic and associated hooks. The topic resource & event.
* are also saved separately.
*
* @since 2.2
* @param string $topic
*/
public function set_topic( $topic ) {
$topic = strtolower( $topic );
list( $resource, $event ) = explode( '.', $topic );
update_post_meta( $this->id, '_topic', $topic );
update_post_meta( $this->id, '_resource', $resource );
update_post_meta( $this->id, '_event', $event );
// custom topics are mapped to a single hook
if ( 'action' === $resource ) {
update_post_meta( $this->id, '_hooks', array( $event ) );
} else {
// API topics have multiple hooks
update_post_meta( $this->id, '_hooks', $this->get_topic_hooks( $topic ) );
}
}
/**
* Get the associated hook names for a topic.
*
* @since 2.2
* @param string $topic
* @return array hook names
*/
private function get_topic_hooks( $topic ) {
$topic_hooks = array(
'coupon.created' => array(
'woocommerce_process_shop_coupon_meta',
'woocommerce_api_create_coupon',
),
'coupon.updated' => array(
'woocommerce_process_shop_coupon_meta',
'woocommerce_api_edit_coupon',
),
'coupon.deleted' => array(
'wp_trash_post',
),
'coupon.restored' => array(
'untrashed_post',
),
'customer.created' => array(
'user_register',
'woocommerce_created_customer',
'woocommerce_api_create_customer',
),
'customer.updated' => array(
'profile_update',
'woocommerce_api_edit_customer',
'woocommerce_customer_save_address',
),
'customer.deleted' => array(
'delete_user',
),
'order.created' => array(
'woocommerce_checkout_order_processed',
'woocommerce_process_shop_order_meta',
'woocommerce_api_create_order',
),
'order.updated' => array(
'woocommerce_process_shop_order_meta',
'woocommerce_api_edit_order',
'woocommerce_order_edit_status',
'woocommerce_order_status_changed',
),
'order.deleted' => array(
'wp_trash_post',
),
'order.restored' => array(
'untrashed_post',
),
'product.created' => array(
'woocommerce_process_product_meta',
'woocommerce_api_create_product',
),
'product.updated' => array(
'woocommerce_process_product_meta',
'woocommerce_api_edit_product',
'woocommerce_product_quick_edit_save',
'woocommerce_product_bulk_edit_save',
),
'product.deleted' => array(
'wp_trash_post',
),
'product.restored' => array(
'untrashed_post',
),
);
$topic_hooks = apply_filters( 'woocommerce_webhook_topic_hooks', $topic_hooks, $this );
return isset( $topic_hooks[ $topic ] ) ? $topic_hooks[ $topic ] : array();
}
/**
* Send a test ping to the delivery URL, sent when the webhook is first created.
*
* @since 2.2
* @return bool|WP_Error
*/
public function deliver_ping() {
$args = array(
'user-agent' => sprintf( 'WooCommerce/%s Hookshot (WordPress/%s)', WC_VERSION, $GLOBALS['wp_version'] ),
'body' => "webhook_id={$this->id}",
);
$test = wp_safe_remote_post( $this->get_delivery_url(), $args );
$response_code = wp_remote_retrieve_response_code( $test );
if ( is_wp_error( $test ) ) {
return new WP_Error( 'error', sprintf( __( 'Error: Delivery URL cannot be reached: %s', 'woocommerce' ), $test->get_error_message() ) );
}
if ( 200 !== $response_code ) {
return new WP_Error( 'error', sprintf( __( 'Error: Delivery URL returned response code: %s', 'woocommerce' ), absint( $response_code ) ) );
}
delete_post_meta( $this->id, '_webhook_pending_delivery' );
return true;
}
/**
* Get the webhook status:
*
* + `active` - delivers payload.
* + `paused` - does not deliver payload, paused by admin.
* + `disabled` - does not delivery payload, paused automatically due to.
* consecutive failures.
*
* @since 2.2
* @return string status
*/
public function get_status() {
switch ( $this->get_post_data()->post_status ) {
case 'publish':
$status = 'active';
break;
case 'draft':
$status = 'paused';
break;
case 'pending':
$status = 'disabled';
break;
default:
$status = 'paused';
}
return apply_filters( 'woocommerce_webhook_status', $status, $this->id );
}
/**
* Get the webhook i18n status.
*
* @return string
*/
public function get_i18n_status() {
$status = $this->get_status();
$statuses = wc_get_webhook_statuses();
return isset( $statuses[ $status ] ) ? $statuses[ $status ] : $status;
}
/**
* Update the webhook status, see get_status() for valid statuses.
*
* @since 2.2
* @param $status
*/
public function update_status( $status ) {
global $wpdb;
switch ( $status ) {
case 'active' :
$post_status = 'publish';
break;
case 'paused' :
$post_status = 'draft';
break;
case 'disabled' :
$post_status = 'pending';
break;
default :
$post_status = 'draft';
break;
}
$wpdb->update( $wpdb->posts, array( 'post_status' => $post_status ), array( 'ID' => $this->id ) );
clean_post_cache( $this->id );
}
/**
* Set the delivery URL.
*
* @since 2.2
* @param string $url
*/
public function set_delivery_url( $url ) {
if ( update_post_meta( $this->id, '_delivery_url', esc_url_raw( $url, array( 'http', 'https' ) ) ) ) {
update_post_meta( $this->id, '_webhook_pending_delivery', true );
}
}
/**
* Get the delivery URL.
*
* @since 2.2
* @return string
*/
public function get_delivery_url() {
return apply_filters( 'woocommerce_webhook_delivery_url', $this->delivery_url, $this->id );
}
/**
* Set the secret used for generating the HMAC-SHA256 signature.
*
* @since 2.2
* @param string $secret
*/
public function set_secret( $secret ) {
update_post_meta( $this->id, '_secret', $secret );
}
/**
* Get the secret used for generating the HMAC-SHA256 signature.
*
* @since 2.2
* @return string
*/
public function get_secret() {
return apply_filters( 'woocommerce_webhook_secret', $this->secret, $this->id );
}
/**
* Get the friendly name for the webhook.
*
* @since 2.2
* @return string
*/
public function get_name() {
return apply_filters( 'woocommerce_webhook_name', $this->get_post_data()->post_title, $this->id );
}
/**
* Get the webhook topic, e.g. `order.created`.
*
* @since 2.2
* @return string
*/
public function get_topic() {
return apply_filters( 'woocommerce_webhook_topic', $this->topic, $this->id );
}
/**
* Get the hook names for the webhook.
*
* @since 2.2
* @return array hook names
*/
public function get_hooks() {
return apply_filters( 'woocommerce_webhook_hooks', $this->hooks, $this->id );
}
/**
* Get the resource for the webhook, e.g. `order`.
*
* @since 2.2
* @return string
*/
public function get_resource() {
return apply_filters( 'woocommerce_webhook_resource', $this->resource, $this->id );
}
/**
* Get the event for the webhook, e.g. `created`.
*
* @since 2.2
* @return string
*/
public function get_event() {
return apply_filters( 'woocommerce_webhook_event', $this->event, $this->id );
}
/**
* Get the failure count.
*
* @since 2.2
* @return int
*/
public function get_failure_count() {
return intval( $this->failure_count );
}
/**
* Get the user ID for this webhook.
*
* @since 2.2
* @return int|string user ID
*/
public function get_user_id() {
return $this->get_post_data()->post_author;
}
/**
* Get the post data for the webhook.
*
* @since 2.2
* @return null|WP_Post
*/
public function get_post_data() {
return $this->post_data;
}
/**
* Set API version.
*
* @since 3.0.0
* @param string $version REST API version.
*/
public function set_api_version( $version ) {
$versions = array(
'wp_api_v2',
'wp_api_v1',
'legacy_v3',
);
if ( ! in_array( $version, $versions, true ) ) {
$version = 'wp_api_v2';
}
update_post_meta( $this->id, '_api_version', $version );
}
/**
* API version.
*
* @since 3.0.0
* @return string
*/
public function get_api_version() {
return $this->api_version ? $this->api_version : 'legacy_v3';
}
}