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<?php
namespace WPForms\Integrations\Square\Api;
use RuntimeException;
use WPForms\Integrations\Square\Helpers;
use WPForms\Vendor\Square\Utils\WebhooksHelper;
/**
* Webhook event handler.
*
* @since 1.9.5
*/
class WebhookEvent {
/**
* Construct and validate the Square webhook event.
*
* @since 1.9.5
*
* @param string $payload The raw JSON payload from Square.
* @param string $signature The Square webhook signature from headers.
* @param string $webhook_secret The webhook signing secret from Square Developer Dashboard.
*
* @return object The decoded event data.
*
* @throws RuntimeException If the webhook payload structure is invalid.
*/
public static function construct_event( string $payload, string $signature, string $webhook_secret ) {
// Validate the webhook signature.
if ( ! WebhooksHelper::isValidWebhookEventSignature( $payload, $signature, $webhook_secret, Helpers::get_webhook_url() ) ) {
throw new RuntimeException( 'Invalid webhook signature. Possible unauthorized request.' );
}
// Decode JSON payload.
$event = json_decode( $payload, false );
// Check for JSON decoding errors.
if ( json_last_error() !== JSON_ERROR_NONE ) {
throw new RuntimeException( 'Invalid JSON payload' );
}
if ( ! $event || ! isset( $event->type, $event->data ) ) {
throw new RuntimeException( 'Invalid webhook payload structure.' );
}
return $event;
}
}