OPApplePayContext

@objc
public class OPApplePayContext : NSObject, OloApplePayContextDelegateInternal, OPApplePayContextProtocol

A helper class that implements and simplifies ApplePay.

Use of this class looks like this:

1. Create a button for ApplePay and connect it to a click handler
2. Enable/Disable or Hide/Show the ApplePay button by calling OloPayAPI.deviceSupportsApplePay()
3. In the click handler, do the following
   1. Check the device supports ApplePay
   2. Create a PKPaymentRequest describing the request (amount, line items, etc)… An easy way to do this is to use the OloPayAPI.createPaymentRequest(...) helper function
   3. Initialize this class with the payment request from the previous step
   4. Call presentApplePay() to present the Apple Pay sheet and begin the payment process
4. Implement OPApplePayContextDelegate.applePaymentMethodCreated(...) to submit the basket to Olo’s Ordering API
5. Optionally implement OPApplePayContextDelegate.applePaymentCompleted(...) to handle success and error states when the ApplePay sheet is dimissed

Example Implementation

class ViewController: UIViewController, OPApplePayContextDelegate {
    // This needs to be a class member variable or it can go out of
    // scope during the ApplePay flow and become nil, preventing callbacks
    // from executing
    var _applePayContext: OPApplePayContextProtocol? = nil

    // Called when user taps on ApplePay button to begin ApplePay flow
    func submitApplePay() {
        let api: OloPayAPIProtocol = OloPayAPI() //This can be mocked for testing purposes
        guard api.deviceSupportsApplePay() else {
            return
        }

        do {
            let pkPaymentRequest = try api.createPaymentRequest(forAmount: 2.99, inCountry: "US", withCurrency: "USD")
            _applePayContext = OPApplePayContext(paymentRequest: pkPaymentRequest, delegate: self) //This can be mocked for testing purposes
            _applePayContext?.presentApplePay() {
                // Optional logic for when the ApplePay flow is displayed
            }
        }
        catch {
            // Handle error conditions. See docs for `OPApplePayContext.presentApplePay()` for more information
        }
    }

    func applePaymentMethodCreated(_ context: OPApplePayContextProtocol, didCreatePaymentMethod paymentMethod: OPPaymentMethod) -> NSError? {
        // Use the payment method to submit the basket to Olo's Ordering API (the basket id can be retrieved with `context.basketId`
        // If the API returns an error, return that error. If the API call is successful, return nil
    }

    func applePaymentCompleted(_ context: OPApplePayContextProtocol, didCompleteWith status: OPPaymentStatus, error: Error?) {
        // This is called after the payment sheet has been dismissed
        // Use the status and error parameters to determine if payment was successful
    }
}