MBL-1123: Implement CreatePaymentIntent

Kickstarter-iOS/Features/PledgePaymentMethods/Controller/PledgePaymentMethodsViewController.swift

@@ -89,6 +89,8 @@ final class PledgePaymentMethodsViewController: UIViewController {
           self.tableView.reloadData()
         } else {
           switch selectedPaymentMethod {
+          case let .paymentIntentClientSecret(selectedPaymentSheetCardId):
+            fallthrough
           case let .setupIntentClientSecret(selectedPaymentSheetCardId):
             self.tableView.visibleCells
               .compactMap { $0 as? PledgePaymentSheetPaymentMethodCell }
@@ -144,33 +146,48 @@ final class PledgePaymentMethodsViewController: UIViewController {
   // MARK: - Functions
 
   private func goToPaymentSheet(data: PaymentSheetSetupData) {
-    PaymentSheet.FlowController
-      .create(
-        setupIntentClientSecret: data.clientSecret,
-        configuration: data.configuration
-      ) { [weak self] result in
-        guard let strongSelf = self else { return }
+    let completion: (Result<PaymentSheet.FlowController, Error>) -> Void = { [weak self] result in
+      guard let strongSelf = self else { return }
 
-        switch result {
-        case let .failure(error):
-          strongSelf.viewModel.inputs.shouldCancelPaymentSheetAppearance(state: true)
-          strongSelf.messageDisplayingDelegate?
-            .pledgeViewController(strongSelf, didErrorWith: error.localizedDescription)
-        case let .success(paymentSheetFlowController):
-          let topViewController = strongSelf.navigationController?.topViewController
-          let paymentSheetShownWithinPledgeContext = topViewController is PledgeViewController
-
-          if paymentSheetShownWithinPledgeContext {
-            strongSelf.paymentSheetFlowController = paymentSheetFlowController
-            strongSelf.paymentSheetFlowController?.presentPaymentOptions(from: strongSelf) { [weak self] in
-              guard let strongSelf = self else { return }
-
-              strongSelf.confirmPaymentResult(with: data.clientSecret)
-            }
-          }
-          strongSelf.viewModel.inputs.stripePaymentSheetDidAppear()
+      switch result {
+      case let .failure(error):
+        strongSelf.viewModel.inputs.shouldCancelPaymentSheetAppearance(state: true)
+        strongSelf.messageDisplayingDelegate?
+          .pledgeViewController(strongSelf, didErrorWith: error.localizedDescription)
+      case let .success(paymentSheetFlowController):
+        let topViewController = strongSelf.navigationController?.topViewController
+
+        assert(
+          topViewController is PledgeViewController ||
+            topViewController is PostCampaignCheckoutViewController,
+          "PledgePaymentMethodsViewController is only intended to be presented as part of a pledge flow."
+        )
+
+        strongSelf.paymentSheetFlowController = paymentSheetFlowController
+        strongSelf.paymentSheetFlowController?.presentPaymentOptions(from: strongSelf) { [weak self] in
+          guard let strongSelf = self else { return }
+
+          strongSelf.confirmPaymentResult(with: data.clientSecret)
         }
+        strongSelf.viewModel.inputs.stripePaymentSheetDidAppear()
       }
+    }
+
+    switch data.paymentSheetType {
+    case .setupIntent:
+      PaymentSheet.FlowController.create(
+        setupIntentClientSecret: data.clientSecret,
+        configuration: data.configuration,
+        completion: completion
+      )
+    case .paymentIntent:
+      PaymentSheet.FlowController
+        .create(
+          paymentIntentClientSecret: data.clientSecret,
+          configuration: data.configuration,
+          completion: completion
+        )
+    }
   }
 
   private func confirmPaymentResult(with clientSecret: String) {
@@ -195,7 +212,7 @@ final class PledgePaymentMethodsViewController: UIViewController {
           label: existingPaymentOption.label
         )
         strongSelf.viewModel.inputs
-          .paymentSheetDidAdd(newCard: paymentDisplayData, setupIntent: clientSecret)
+          .paymentSheetDidAdd(newCard: paymentDisplayData, clientSecret: clientSecret)
       case .canceled:
         strongSelf.messageDisplayingDelegate?
           .pledgeViewController(strongSelf, didErrorWith: Strings.general_error_something_wrong())

Kickstarter-iOS/Features/PledgePaymentMethods/Controller/PledgePaymentMethodsViewControllerTests.swift

@@ -50,7 +50,9 @@ final class PledgePaymentMethodsViewControllerTests: TestCase {
           project: project,
           reward: reward,
           context: .pledge,
-          refTag: nil
+          refTag: nil,
+          pledgeTotal: Double.nan,
+          paymentSheetType: .setupIntent
         )
 
         controller.configure(with: data)
@@ -89,7 +91,9 @@ final class PledgePaymentMethodsViewControllerTests: TestCase {
           project: project,
           reward: reward,
           context: .pledge,
-          refTag: nil
+          refTag: nil,
+          pledgeTotal: Double.nan,
+          paymentSheetType: .setupIntent
         )
 
         controller.configure(with: data)

Kickstarter-iOS/Features/PledgePaymentMethods/Datasource/PledgePaymentMethodsDataSourceTests.swift

@@ -44,14 +44,14 @@ final class PledgePaymentMethodsDataSourceTests: XCTestCase {
       (
         image: UIImage(),
         redactedCardNumber: "test1",
-        setupIntent: "seti_1LVlHO4VvJ2PtfhK43R6p7FI_secret_MEDiGbxfYVnHGsQy8v8TbZJTQhlNKLZ",
+        clientSecret: "seti_1LVlHO4VvJ2PtfhK43R6p7FI_secret_MEDiGbxfYVnHGsQy8v8TbZJTQhlNKLZ",
         isSelected: true,
         isEnabled: true
       ),
       (
         image: UIImage(),
         redactedCardNumber: "test2",
-        setupIntent: "seti_2LVlHO4VvJ2PtfhK43R6p7FI_secret_MEDiGbxfYVnHGsQy8v8TbZJTQhlNKLP",
+        clientSecret: "seti_2LVlHO4VvJ2PtfhK43R6p7FI_secret_MEDiGbxfYVnHGsQy8v8TbZJTQhlNKLP",
         isSelected: false,
         isEnabled: true
       )
@@ -92,14 +92,14 @@ final class PledgePaymentMethodsDataSourceTests: XCTestCase {
       (
         image: UIImage(),
         redactedCardNumber: "test1",
-        setupIntent: "seti_1LVlHO4VvJ2PtfhK43R6p7FI_secret_MEDiGbxfYVnHGsQy8v8TbZJTQhlNKLZ",
+        clientSecret: "seti_1LVlHO4VvJ2PtfhK43R6p7FI_secret_MEDiGbxfYVnHGsQy8v8TbZJTQhlNKLZ",
         isSelected: true,
         isEnabled: true
       ),
       (
         image: UIImage(),
         redactedCardNumber: "test2",
-        setupIntent: "seti_2LVlHO4VvJ2PtfhK43R6p7FI_secret_MEDiGbxfYVnHGsQy8v8TbZJTQhlNKLP",
+        clientSecret: "seti_2LVlHO4VvJ2PtfhK43R6p7FI_secret_MEDiGbxfYVnHGsQy8v8TbZJTQhlNKLP",
         isSelected: false,
         isEnabled: true
       )

Kickstarter-iOS/Features/PledgeView/Controllers/PostCampaignCheckoutViewController.swift

@@ -1,6 +1,7 @@
 import KsApi
 import Library
 import Prelude
+import Stripe
 import UIKit
 
 private enum PostCampaignCheckoutLayout {
@@ -204,6 +205,13 @@ final class PostCampaignCheckoutViewController: UIViewController {
       }
 
     self.paymentMethodsViewController.view.rac.hidden = self.viewModel.outputs.paymentMethodsViewHidden
+
+    self.viewModel.outputs.configureStripeIntegration
+      .observeForUI()
+      .observeValues { merchantIdentifier, publishableKey in
+        STPAPIClient.shared.publishableKey = publishableKey
+        STPAPIClient.shared.configuration.appleMerchantIdentifier = merchantIdentifier
+      }
   }
 
   // MARK: - Functions

Library/ViewModels/PaymentMethodsViewModel.swift

@@ -86,13 +86,13 @@ public final class PaymentMethodsViewModel: PaymentMethodsViewModelType,
         return (
           image: displayData.image,
           redactedCardNumber: displayData.label,
-          setupIntent: setupIntent,
+          clientSecret: setupIntent,
           isSelected: false,
           isEnabled: true
         )
       }
       .map { paymentMethodData -> String? in
-        guard let selectedPaymentSheetPaymentMethodCardId = paymentMethodData?.setupIntent else {
+        guard let selectedPaymentSheetPaymentMethodCardId = paymentMethodData?.clientSecret else {
           return nil
         }
 
@@ -155,7 +155,8 @@ public final class PaymentMethodsViewModel: PaymentMethodsViewModelType,
             configuration.allowsDelayedPaymentMethods = true
             let data = PaymentSheetSetupData(
               clientSecret: envelope.clientSecret,
-              configuration: configuration
+              configuration: configuration,
+              paymentSheetType: .setupIntent
             )
             return SignalProducer(value: data)
           }

Library/ViewModels/PaymentSourceSelected.swift

@@ -2,6 +2,7 @@ import Foundation
 public enum PaymentSourceSelected: Equatable {
   case paymentSourceId(String)
   case setupIntentClientSecret(String)
+  case paymentIntentClientSecret(String)
 
   public var paymentSourceId: String? {
     switch self {
@@ -20,4 +21,13 @@ public enum PaymentSourceSelected: Equatable {
       return nil
     }
   }
+
+  public var paymentIntentClientSecret: String? {
+    switch self {
+    case let .paymentIntentClientSecret(value):
+      return value
+    default:
+      return nil
+    }
+  }
 }