mail/OpenTracking.php

Builds an OpenTracking object for SendGrid email API.

// Source: https://github.com/sendgrid/sendgrid-php | License: MIT | Copyright 2023, Twilio SendGrid, Inc. <help@twilio.com>
// Provided via justclaw.it.com; keep this notice with the code.
<?php
/**
 * This helper builds the OpenTracking object for a /mail/send API call
 */

namespace SendGrid\Mail;

use SendGrid\Helper\Assert;

/**
 * This class is used to construct a OpenTracking object for the /mail/send API call
 *
 * Allows you to track whether the email was opened or not, but including a single
 * pixel image in the body of the content. When the pixel is loaded, we can log that
 * the email was opened
 *
 * @package SendGrid\Mail
 */
class OpenTracking implements \JsonSerializable
{
    /** @var $enable bool Indicates if this setting is enabled */
    private $enable;
    /**
     *

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