sendKeapEmail.php

<?php

namespace App\Services;

use App\Services\Contracts\CRM as CRMContract;

class CRM implements CRMContract
{
  
    public function sendEmail(array $contactIds, $emailEntry) : array
    {
        $htmlContent = $emailEntry->content;

        // replace escaped braces in html content
        $htmlContent = strtr($htmlContent, [
            '%5B%5B' => '[[', // [[
            '%5D%5D' => ']]', // ]]
            '%7B%7B' => '{{', // {{
            '%7D%7D' => '}}', // }}
        ]);

        $emailPayload = [
            'contacts' => $contactIds,
            'html_content' => base64_encode($htmlContent),
            'plain_content' => base64_encode($this->htmlToText($htmlContent)),
            'subject' => $emailEntry->subject,
            'user_id' => $emailEntry->from ? intval($emailEntry->from->value()) : self::KEAP_USER_ID,
        ];

        return $this->keapApi()
            ->post("emails/queue", $emailPayload)
            ->json();
    }
}