Fix 387 paid multi-participant registration fails

CRM/Core/Payment/Stripe.php

@@ -636,9 +636,36 @@ class CRM_Core_Payment_Stripe extends CRM_Core_Payment {
     $intentParams['statement_descriptor_suffix'] = $this->getDescription($params, 'statement_descriptor_suffix');
     $intentParams['statement_descriptor'] = $this->getDescription($params, 'statement_descriptor');
 
+    if (!$propertyBag->has('paymentIntentID') && !empty($paymentMethodID)) {
+      // We came in via a flow that did not know the amount before submit (eg. multiple event participants)
+      // We need to create a paymentIntent
+      $stripePaymentIntent = new CRM_Stripe_PaymentIntent($this);
+      $stripePaymentIntent->setDescription($this->getDescription($params));
+      $stripePaymentIntent->setReferrer($_SERVER['HTTP_REFERER'] ?? '');
+      $stripePaymentIntent->setExtraData($params['extra_data'] ?? []);
+
+      $paymentIntentParams = [
+        'paymentMethodID' => $paymentMethodID,
+        'customer' => $stripeCustomer->id,
+        'capture' => FALSE,
+        'amount' => $propertyBag->getAmount(),
+        'currency' => $propertyBag->getCurrency(),
+      ];
+      $processIntentResult = $stripePaymentIntent->processPaymentIntent($paymentIntentParams);
+      if ($processIntentResult->ok && !empty($processIntentResult->data['success'])) {
+        $paymentIntentID = $processIntentResult->data['paymentIntent']['id'];
+      }
+      else {
+        \Civi::log('stripe')->error('Attempted to create paymentIntent from paymentMethod during doPayment failed: ' . print_r($processIntentResult, TRUE));
+      }
+    }
+
     // This is where we actually charge the customer
     try {
-      $intent = $this->stripeClient->paymentIntents->retrieve($propertyBag->getCustomProperty('paymentIntentID'));
+      if (empty($paymentIntentID)) {
+        $paymentIntentID = $propertyBag->getCustomProperty('paymentIntentID');
+      }
+      $intent = $this->stripeClient->paymentIntents->retrieve($paymentIntentID);
       if ($intent->amount != $this->getAmount($params)) {
         $intentParams['amount'] = $this->getAmount($params);
       }

CRM/Stripe/PaymentIntent.php

@@ -308,12 +308,19 @@ class CRM_Stripe_PaymentIntent {
     return $resultObject;
   }
 
+  /**
+   * @param array $params
+   *
+   * @return object
+   * @throws \Stripe\Exception\ApiErrorException
+   */
   public function processPaymentIntent($params) {
     /*
     $params = [
       // Either paymentIntentID or paymentMethodID must be set
       'paymentIntentID' => 'pi_xx',
       'paymentMethodID' => 'pm_xx',
+      'customer' => 'cus_xx', // required if paymentMethodID is set
       'capture' => TRUE/FALSE,
       'amount' => '12.05',
       'currency' => 'USD',
@@ -348,9 +355,12 @@ class CRM_Stripe_PaymentIntent {
         $intentParams['capture_method'] = 'manual';
         // Setup the card to be saved and used later
         $intentParams['setup_future_usage'] = 'off_session';
-        if ($params['paymentMethodID']) {
+        if (isset($params['paymentMethodID'])) {
           $intentParams['payment_method'] = $params['paymentMethodID'];
         }
+        if (isset($params['customer'])) {
+          $intentParams['customer'] = $params['customer'];
+        }
         $intent = $this->paymentProcessor->stripeClient->paymentIntents->create($intentParams);
       } catch (Exception $e) {
         // Save the "error" in the paymentIntent table in in case investigation is required.