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Edit File: PysServerEvent.php

<?php namespace PixelYourSite; use PYS_PRO_GLOBAL\FacebookAds\Object\ServerSide\Event; defined( 'ABSPATH' ) || exit; if ( ! class_exists( __NAMESPACE__ . '\PysServerEvent', false ) ) { /** * Server event with the top-level `referrer_url` parameter, which the * vendored SDK's Event has no field for. Old queued events are plain * Event objects and simply lack it. */ class PysServerEvent extends Event { /** @var string */ private $referrer_url = ''; public function setReferrerUrl( $referrer_url ) { $this->referrer_url = (string) $referrer_url; return $this; } public function getReferrerUrl() { return $this->referrer_url; } public function normalize() { $payload = parent::normalize(); if ( '' !== $this->referrer_url ) { $payload['referrer_url'] = $this->referrer_url; } // UserData::dedup() returns array_keys(), and PHP turns the numeric // string key of a raw account id into an int -- which would leave as // a JSON number while Meta types external_id as list<string> and the // browser pixel sends the decimal string. Put the strings back, so // both channels name the person identically. if ( isset( $payload['user_data']['external_id'] ) && is_array( $payload['user_data']['external_id'] ) ) { $payload['user_data']['external_id'] = array_map( 'strval', $payload['user_data']['external_id'] ); } return $payload; } } }