/**
* Implements #element_validate for the rounding step element.
*/
public function validateRoundingStep(array $element, FormStateInterface $form_state, array $form)
{
$rounding_step = $this->inputParser->parseAmount($element['#value']);
if ($rounding_step === FALSE) {
$form_state->setError($element, $this->t('The rounding step is not numeric.'));
}
$form_state->setValueForElement($element, $rounding_step);
}
/**
* Implements preg_replace_callback() callback.
*
* @see self::process()
*/
function processCallback(array $matches)
{
$currency_code = $matches[1];
$amount = $this->input->parseAmount($matches[2]);
// The amount is invalid, so return the token.
if (!$amount) {
return $matches[0];
}
/** @var \Drupal\currency\Entity\CurrencyInterface $currency */
$currency = $this->currencyStorage->load($currency_code);
$this->currentFilterProcessResult->addCacheableDependency($currency);
if ($currency) {
return $currency->formatAmount($amount);
}
// The currency code is invalid, so return the token.
return $matches[0];
}
/**
* Implements preg_replace_callback() callback.
*
* @see self::process()
*/
function processCallback(array $matches)
{
$currency_code_from = $matches[1];
$currency_code_to = $matches[2];
$amount = str_replace(':', '', $matches[3]);
if (strlen($amount) !== 0) {
$amount = $this->input->parseAmount($amount);
// The amount is invalid, so return the token.
if (!$amount) {
return $matches[0];
}
} else {
$amount = 1;
}
$exchange_rate = $this->exchangeRateProvider->load($currency_code_from, $currency_code_to);
$this->currentFilterProcessResult->addCacheableDependency($exchange_rate);
if ($exchange_rate) {
return bcmul($amount, $exchange_rate->getRate(), 6);
}
// No exchange rate could be loaded, so return the token.
return $matches[0];
}
/**
* Implements form #element_validate callback.
*/
public function elementValidate($element, FormStateInterface $form_state, array $form)
{
$values = $form_state->getValues();
$value = NestedArray::getValue($values, $element['#parents']);
$amount = $value['amount'];
$currency_code = $value['currency_code'];
// Confirm that the amount is numeric.
$amount = $this->input->parseAmount($amount);
if ($amount === FALSE) {
$form_state->setError($element['amount'], $this->t('%title is not numeric.', ['%title' => $element['#title']]));
}
// Confirm the amount lies within the allowed range.
/** @var \Drupal\currency\Entity\CurrencyInterface $currency */
$currency = $this->currencyStorage->load($currency_code);
if ($element['#minimum_amount'] !== FALSE && bccomp($element['#minimum_amount'], $amount, 6) > 0) {
$form_state->setError($element['amount'], $this->t('The minimum amount is @amount.', ['@amount' => $currency->formatAmount($element['#minimum_amount'])]));
} elseif ($element['#maximum_amount'] !== FALSE && bccomp($amount, $element['#maximum_amount'], 6) > 0) {
$form_state->setError($element['amount'], $this->t('The maximum amount is @amount.', ['@amount' => $currency->formatAmount($element['#maximum_amount'])]));
}
// The amount in $form_state is a human-readable, optionally localized
// string, which cannot be used by other code. $amount is a numeric string
// after running it through \Drupal::service('currency.input')->parseAmount().
$form_state->setValueForElement($element, ['amount' => $amount, 'currency_code' => $currency_code]);
}