Visitor.php

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<?php
namespace Magento\Customer\Model;

use Magento\Framework\App\ObjectManager;
use Magento\Framework\App\RequestSafetyInterface;

class Visitor extends \Magento\Framework\Model\AbstractModel
{
    const VISITOR_TYPE_CUSTOMER = 'c';

    const VISITOR_TYPE_VISITOR = 'v';

    const DEFAULT_ONLINE_MINUTES_INTERVAL = 15;

    const XML_PATH_ONLINE_INTERVAL = 'customer/online_customers/online_minutes_interval';

    protected $ignoredUserAgents;

    protected $session;

    protected $httpHeader;

    protected $skipRequestLogging = false;

    protected $ignores;

    protected $scopeConfig;

    protected $dateTime;

    protected $indexerRegistry;

    private $requestSafety;

    public function __construct(
        \Magento\Framework\Model\Context $context,
        \Magento\Framework\Registry $registry,
        \Magento\Framework\Session\SessionManagerInterface $session,
        \Magento\Framework\HTTP\Header $httpHeader,
        \Magento\Framework\App\Config\ScopeConfigInterface $scopeConfig,
        \Magento\Framework\Stdlib\DateTime $dateTime,
        \Magento\Framework\Indexer\IndexerRegistry $indexerRegistry,
        \Magento\Framework\Model\ResourceModel\AbstractResource $resource = null,
        \Magento\Framework\Data\Collection\AbstractDb $resourceCollection = null,
        array $ignoredUserAgents = [],
        array $ignores = [],
        array $data = [],
        RequestSafetyInterface $requestSafety = null
    ) {
        $this->session = $session;
        $this->httpHeader = $httpHeader;
        $this->ignoredUserAgents = $ignoredUserAgents;
        parent::__construct($context, $registry, $resource, $resourceCollection, $data);
        $this->ignores = $ignores;
        $this->scopeConfig = $scopeConfig;
        $this->dateTime = $dateTime;
        $this->indexerRegistry = $indexerRegistry;
        $this->requestSafety = $requestSafety ?? ObjectManager::getInstance()->get(RequestSafetyInterface::class);
    }

    protected function _construct()
    {
        $this->_init(\Magento\Customer\Model\ResourceModel\Visitor::class);
        $userAgent = $this->httpHeader->getHttpUserAgent();
        if ($this->ignoredUserAgents) {
            if (in_array($userAgent, $this->ignoredUserAgents)) {
                $this->skipRequestLogging = true;
            }
        }
    }

    public function setSkipRequestLogging($skipRequestLogging)
    {
        $this->skipRequestLogging = (bool)$skipRequestLogging;
        return $this;
    }

    public function initByRequest($observer)
    {
        if ($this->skipRequestLogging || $this->isModuleIgnored($observer)) {
            return $this;
        }

        if ($this->session->getVisitorData()) {
            $this->setData($this->session->getVisitorData());
            if ($this->getSessionId() != $this->session->getSessionId()) {
                $this->setSessionId($this->session->getSessionId());
            }
        }

        $this->setLastVisitAt((new \DateTime())->format(\Magento\Framework\Stdlib\DateTime::DATETIME_PHP_FORMAT));

        // prevent saving Visitor for safe methods, e.g. GET request
        if ($this->requestSafety->isSafeMethod()) {
            return $this;
        }
        if (!$this->getId()) {
            $this->setSessionId($this->session->getSessionId());
            $this->save();
            $this->_eventManager->dispatch('visitor_init', ['visitor' => $this]);
            $this->session->setVisitorData($this->getData());
        }
        return $this;
    }

    public function saveByRequest($observer)
    {
        // prevent saving Visitor for safe methods, e.g. GET request
        if ($this->skipRequestLogging || $this->requestSafety->isSafeMethod() || $this->isModuleIgnored($observer)) {
            return $this;
        }

        try {
            $this->save();
            $this->_eventManager->dispatch('visitor_activity_save', ['visitor' => $this]);
            $this->session->setVisitorData($this->getData());
        } catch (\Exception $e) {
            $this->_logger->critical($e);
        }
        return $this;
    }

    public function isModuleIgnored($observer)
    {
        if (is_array($this->ignores) && $observer) {
            $curModule = $observer->getEvent()->getControllerAction()->getRequest()->getRouteName();
            if (isset($this->ignores[$curModule])) {
                return true;
            }
        }
        return false;
    }

    public function bindCustomerLogin($observer)
    {
        $customer = $observer->getEvent()->getCustomer();
        if (!$this->getCustomerId()) {
            $this->setDoCustomerLogin(true);
            $this->setCustomerId($customer->getId());
        }
        return $this;
    }

    public function bindCustomerLogout($observer)
    {
        if ($this->getCustomerId()) {
            $this->setDoCustomerLogout(true);
        }
        return $this;
    }

    public function bindQuoteCreate($observer)
    {
        $quote = $observer->getEvent()->getQuote();
        if ($quote) {
            if ($quote->getIsCheckoutCart()) {
                $this->setQuoteId($quote->getId());
                $this->setDoQuoteCreate(true);
            }
        }
        return $this;
    }

    public function bindQuoteDestroy($observer)
    {
        $quote = $observer->getEvent()->getQuote();
        if ($quote) {
            $this->setDoQuoteDestroy(true);
        }
        return $this;
    }

    public function getCleanTime()
    {
        return $this->scopeConfig->getValue(
            \Magento\Framework\Session\Config::XML_PATH_COOKIE_LIFETIME,
            \Magento\Store\Model\ScopeInterface::SCOPE_STORE
        ) + 86400;
    }

    public function clean()
    {
        $this->getResource()->clean($this);
        return $this;
    }

    public function getOnlineInterval()
    {
        $configValue = intval(
            $this->scopeConfig->getValue(
                static::XML_PATH_ONLINE_INTERVAL,
                \Magento\Store\Model\ScopeInterface::SCOPE_STORE
            )
        );
        return $configValue ?: static::DEFAULT_ONLINE_MINUTES_INTERVAL;
    }
}