notification.php

См. документацию.

<?php
 
namespace Bitrix\Rest\Configuration;

class Notification
{
    public const TYPE_NOTICE = 'notice';
    public const TYPE_ERROR = 'error';
    public const TYPE_EXCEPTION = 'exception';
 
    private $setting;
    private $notificationList;
    private $holdSaveToBase = false;

    public function __construct(Setting $setting)
    {
        $this->setting = $setting;
        $this->notificationList = $this->setting->get(Setting::SETTING_NOTICE_COLLECTION) ?? [];
    }

    public function save($result): bool
    {
        $this->holdSaveToBase = true;
 
        if (isset($result['ERROR_ACTION']) && $result['ERROR_ACTION'])
        {
            $this->add($result['ERROR_ACTION'], '', self::TYPE_NOTICE);
        }
 
        if (isset($result['ERROR_MESSAGES']) && $result['ERROR_MESSAGES'])
        {
            $this->add($result['ERROR_MESSAGES'], '', self::TYPE_ERROR);
        }
 
        if (isset($result['ERROR_EXCEPTION']) && $result['ERROR_EXCEPTION'])
        {
            $this->add($result['ERROR_EXCEPTION'], '', self::TYPE_EXCEPTION);
        }
 
        $this->holdSaveToBase = false;
 
        return $this->setting->set(Setting::SETTING_NOTICE_COLLECTION, $this->notificationList);
    }

    public function add($message, $code, $type): bool
    {
        if (is_array($message))
        {
            foreach ($message as $mess)
            {
                $this->notificationList[] = [
                    'code' => $code,
                    'message' => $mess,
                    'type' => $type,
                ];
            }
        }
        else
        {
            $this->notificationList[] = [
                'code' => $code,
                'message' => $message,
                'type' => $type,
            ];
        }
 
        return
            !$this->holdSaveToBase
            && $this->setting->set(
                Setting::SETTING_NOTICE_COLLECTION,
                $this->notificationList
            );
    }

    public function list(array $filter = []): ?array
    {
        $result = $this->notificationList;
 
        if ($filter['type'] !== null)
        {
            foreach ($result as $key => $item)
            {
                if ($item['type'] !== $filter['type'])
                {
                    unset($result[$key]);
                }
            }
        }
 
        return $result;
    }

    public function clean(): bool
    {
        return $this->setting->delete(Setting::SETTING_NOTICE_COLLECTION);
    }
}