How does the PayPal Express payment method detect whether it is available?

dmitry_fedyuk · February 7, 2016, 2:17am

magento/magento2/blob/6ce74b2/app/code/Magento/Paypal/Model/Express.php#L332-L340


/**
 * Check whether payment method can be used
 * @param \Magento\Quote\Api\Data\CartInterface|Quote|null $quote
 * @return bool
 */
public function isAvailable(\Magento\Quote\Api\Data\CartInterface $quote = null)
{
    return parent::isAvailable($quote) && $this->_pro->getConfig()->isMethodAvailable();
}

github.com

magento/magento2/blob/6ce74b2/app/code/Magento/Payment/Model/Method/AbstractMethod.php#L807-L807


if (!$this->isActive($quote ? $quote->getStoreId() : null)) {

github.com

magento/magento2/blob/6ce74b2/app/code/Magento/Paypal/Model/Express.php#L876-L884


public function isActive($storeId = null)
{
    $pathStandardExpress = 'payment/' . Config::METHOD_WPS_EXPRESS . '/active';
    $pathPaypalExpress = 'payment/' . Config::METHOD_WPP_EXPRESS . '/active';


    return parent::isActive($storeId)
    || (bool)(int)$this->_scopeConfig->getValue($pathStandardExpress, ScopeInterface::SCOPE_STORE, $storeId)
    || (bool)(int)$this->_scopeConfig->getValue($pathPaypalExpress, ScopeInterface::SCOPE_STORE, $storeId);
}

github.com

magento/magento2/blob/6ce74b2/app/code/Magento/Paypal/Model/Config.php#L628-L636


/**
 * Check whether method available for checkout or not
 * Logic based on merchant country, methods dependence
 *
 * @param string|null $methodCode
 * @return bool
 * @SuppressWarnings(PHPMD.CyclomaticComplexity)
 */
public function isMethodAvailable($methodCode = null)

github.com

magento/magento2/blob/6ce74b2/app/code/Magento/Paypal/Model/AbstractConfig.php#L226-L238


/**
 * Check whether method available for checkout or not
 *
 * @param null $methodCode
 *
 * @return bool
 */
public function isMethodAvailable($methodCode = null)
{
    $methodCode = $methodCode ?: $this->_methodCode;


    return $this->isMethodActive($methodCode);
}

github.com

magento/magento2/blob/6ce74b2/app/code/Magento/Paypal/Model/AbstractConfig.php#L240-L249


/**
 * Check whether method active in configuration and supported for merchant country or not
 *
 * @param string $method Method code
 * @return bool
 *
 * @todo: refactor this
 * @SuppressWarnings(PHPMD.CyclomaticComplexity)
 */
public function isMethodActive($method)

github.com

magento/magento2/blob/6ce74b2/app/code/Magento/Paypal/Model/AbstractConfig.php#L251-L265


switch ($method) {
    case Config::METHOD_WPS_EXPRESS:
    case Config::METHOD_WPP_EXPRESS:
        $isEnabled = $this->_scopeConfig->isSetFlag(
            'payment/' . Config::METHOD_WPS_EXPRESS .'/active',
            ScopeInterface::SCOPE_STORE,
            $this->_storeId
        )
        || $this->_scopeConfig->isSetFlag(
            'payment/' . Config::METHOD_WPP_EXPRESS .'/active',
            ScopeInterface::SCOPE_STORE,
            $this->_storeId
        );
        $method = Config::METHOD_WPP_EXPRESS;
        break;

github.com

magento/magento2/blob/6ce74b2/app/code/Magento/Paypal/Model/AbstractConfig.php#L302-L302


return $this->isMethodSupportedForCountry($method) && $isEnabled;

github.com

magento/magento2/blob/6ce74b2/app/code/Magento/Paypal/Model/Config.php#L719-L736


/**
 * Check whether method supported for specified country or not
 * Use $_methodCode and merchant country by default
 *
 * @param string|null $method
 * @param string|null $countryCode
 * @return bool
 */
public function isMethodSupportedForCountry($method = null, $countryCode = null)
{
    if ($method === null) {
        $method = $this->getMethodCode();
    }
    if ($countryCode === null) {
        $countryCode = $this->getMerchantCountry();
    }
    return in_array($method, $this->getCountryMethods($countryCode));
}

github.com

magento/magento2/blob/6ce74b2/app/code/Magento/Paypal/Model/Config.php#L701-L717


/**
 * Return merchant country code, use default country if it not specified in General settings
 *
 * @return string
 */
public function getMerchantCountry()
{
    $countryCode = $this->_scopeConfig->getValue(
        $this->_mapGeneralFieldset('merchant_country'),
        \Magento\Store\Model\ScopeInterface::SCOPE_STORE,
        $this->_storeId
    );
    if (!$countryCode) {
        $countryCode = $this->directoryHelper->getDefaultCountry($this->_storeId);
    }
    return $countryCode;
}

dmitry_fedyuk · February 7, 2016, 2:17am