[Payment Request] Makes sure only complete credit cards can be selected

ios/chrome/browser/payments/payment_request.mm

 // Copyright 2017 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "ios/chrome/browser/payments/payment_request.h"
 
+#include <algorithm>
+
 #include "base/containers/adapters.h"
 #include "base/memory/ptr_util.h"
 #include "base/strings/utf_string_conversions.h"
 #include "components/autofill/core/browser/autofill_data_util.h"
 #include "components/autofill/core/browser/autofill_profile.h"
 #include "components/autofill/core/browser/credit_card.h"
 #include "components/autofill/core/browser/personal_data_manager.h"
 #include "components/autofill/core/browser/region_data_loader_impl.h"
+#include "components/autofill/core/browser/validation.h"
 #include "components/payments/core/currency_formatter.h"
 #include "components/payments/core/payment_request_data_util.h"
 #include "ios/chrome/browser/application_context.h"
 #include "ios/chrome/browser/autofill/validation_rules_storage_factory.h"
+#import "ios/chrome/browser/payments/payment_request_util.h"
 #include "ios/web/public/payments/payment_request.h"
 #include "third_party/libaddressinput/chromium/chrome_metadata_source.h"
 #include "third_party/libaddressinput/src/cpp/include/libaddressinput/source.h"
 #include "third_party/libaddressinput/src/cpp/include/libaddressinput/storage.h"
 
 #if !defined(__has_feature) || !__has_feature(objc_arc)
 #error "This file requires ARC support."
 #endif
 
 namespace {
@@ skipping 37 matching lines @@
     selected_shipping_profile_ = shipping_profiles_[0];
   }
 
   // If the highest-ranking contact profile is usable, select it. Otherwise,
   // select none.
   if (!contact_profiles_.empty() &&
       profile_comparator_.IsContactInfoComplete(contact_profiles_[0])) {
     selected_contact_profile_ = contact_profiles_[0];
   }
 
-  // Select the highest ranking credit card.
-  if (!credit_cards_.empty())
-    selected_credit_card_ = credit_cards_[0];
+  // TODO(crbug.com/702063): Change this code to prioritize credit cards by use
+  // count and other means.
+  auto first_complete_credit_card = std::find_if(
+      credit_cards_.begin(), credit_cards_.end(),
+      [this](const autofill::CreditCard* credit_card) {
+        DCHECK(credit_card);
+        return payment_request_util::IsCreditCardCompleteForPayment(
+            *credit_card, billing_profiles());
+      });
+  if (first_complete_credit_card != credit_cards_.end())
+    selected_credit_card_ = *first_complete_credit_card;
 }
 
 PaymentRequest::~PaymentRequest() {}
 
 void PaymentRequest::UpdatePaymentDetails(const web::PaymentDetails& details) {
   web_payment_request_.details = details;
   PopulateAvailableShippingOptions();
   SetSelectedShippingOption();
 }
 
@@ skipping 90 matching lines @@
   PopulateAvailableCreditCards();
 
   return credit_card_cache_.back().get();
 }
 
 payments::PaymentsProfileComparator* PaymentRequest::profile_comparator() {
   return &profile_comparator_;
 }
 
 bool PaymentRequest::CanMakePayment() const {
-  return !credit_cards_.empty();
+  for (const autofill::CreditCard* credit_card : credit_cards_) {
+    DCHECK(credit_card);
+    autofill::CreditCardCompletionStatus status =
+        autofill::GetCompletionStatusForCard(
+            *credit_card, GetApplicationContext()->GetApplicationLocale(),
+            billing_profiles());
+    // A card only has to have a cardholder name and a number for the purposes
+    // of CanMakePayment. An expired card or one without a billing address is
+    // valid for this purpose.
+    return !(status & autofill::CREDIT_CARD_NO_CARDHOLDER ||
+             status & autofill::CREDIT_CARD_NO_NUMBER);
+  }
+  return false;
 }
 
 void PaymentRequest::PopulateCreditCardCache() {
   // TODO(crbug.com/709036): Validate method data.
   payments::data_util::ParseBasicCardSupportedNetworks(
       web_payment_request_.method_data, &supported_card_networks_,
       &basic_card_specified_networks_);
 
   const std::vector<autofill::CreditCard*>& credit_cards_to_suggest =
       personal_data_manager_->GetCreditCardsToSuggest();
@@ skipping 46 matching lines @@
 void PaymentRequest::SetSelectedShippingOption() {
   // If more than one option has |selected| set, the last one in the sequence
   // should be treated as the selected item.
   for (auto* shipping_option : base::Reversed(shipping_options_)) {
     if (shipping_option->selected) {
       selected_shipping_option_ = shipping_option;
       break;
     }
   }
 }