purchases-ios/RevenueCatUI/View+OnRedeemWebPurchaseAttempt.swift

//
//  Copyright RevenueCat Inc. All Rights Reserved.
//
//  Licensed under the MIT License (the "License");
//  you may not use this file except in compliance with the License.
//  You may obtain a copy of the License at
//
//      https://opensource.org/licenses/MIT
//
//  View+OnRedeemWebPurchaseAttempt.swift
//
//  Created by Antonio Rico Diez on 7/11/24.

import RevenueCat
import SwiftUI

@available(iOS 14.0, macOS 11.0, tvOS 14.0, watchOS 7.0, *)
extension View {

    /// If an URL is found by using onOpenUrl, it will parse the URL and if it's a RevenueCat
    /// web purchase redemption link, it will perform the redemption automatically
    /// and return the result in the completion lambda.
    /// Example:
    /// ```swift
    /// var body: some View {
    ///    YourApp()
    ///      .onWebPurchaseRedemptionAttempt { result in
    ///          handleWebPurchaseRedemptionResult(result)
    ///      }
    /// }
    /// ```
    /// - Note: If the SDK is not configured when the URL is received, the URL will be ignored
    /// - Note: If you need to control better when to perform the redemption, see our docs for examples.
    public func onWebPurchaseRedemptionAttempt(
        perform completion: @escaping @Sendable (WebPurchaseRedemptionResult) -> Void
    ) -> some View {
        return self.modifier(PresentingPaywallModifier(completion: completion))
    }
}

@available(iOS 14.0, macOS 11.0, tvOS 14.0, watchOS 7.0, *)
private struct PresentingPaywallModifier: ViewModifier {

    var completion: (WebPurchaseRedemptionResult) -> Void

    init(completion: @escaping @Sendable (WebPurchaseRedemptionResult) -> Void) {
        self.completion = completion
    }

    func body(content: Content) -> some View {
        content.onOpenURL { url in
            if let webPurchaseRedemption = url.asWebPurchaseRedemption,
                Purchases.isConfigured {
                Task {
                    let result = await Purchases.shared.redeemWebPurchase(webPurchaseRedemption)
                    completion(result)
                }
            }
        }
    }
}