OAuthService

func getAuthCode(
    clientId: String, 
    scopes: Set<String>, 
    type: IAPWalletOAuthCodeFlowType = .standard, 
    extendedInfo: [String : String] = [:], 
    in context: IAPWalletAPIContext? = nil, 
    callback: @escaping (IAPWalletOAuthResult) -> Void
) -> Void

func showAuthPage(
    clientId: String,
    name: String,
    logo: String,
    scopes: Set<String>,
    extendedInfo: [String: String]? = [:],
    in context: IAPWalletAPIContext? = nil,
    callback: @escaping (IAPWalletAuthPageConfirmResult) -> Void
) -> Void

func getAuthorizedScopes(
    clientId: String, 
    extendedInfo: [String: String] = [:], 
    in context: IAPWalletAPIContext? = nil, 
    callback: @escaping (IAPWalletOAuthScopeQueryResult) -> Void
) -> Void

final class OAuthService: IAPWalletOAuthServiceSignature {

    // MARK: getAuthCode
    override func getAuthCode(
        clientId: String, scopes: Set<String>, 
        type: IAPWalletOAuthCodeFlowType = .standard, 
        extendedInfo: [String : String] = [:], 
        in context: IAPWalletAPIContext? = nil, 
        callback: @escaping (IAPWalletOAuthResult) -> Void
    ) {
        //The logic to be executed if the requested scopes require the user's consent
        let oAuthSuccessful: Bool = xxx
        if (oAuthSuccessful) { //The logic to be executed if OAuth is successful 
            let oAuthResult = IAPWalletOAuthResult(
                authCode: "AUTH_CODE",
                authErrorScopes: [:],
                authSuccessScopes: []
            )
            callback(oAuthResult)
        } else { //The logic to be executed if Oauth fails
            let oAuthResult = IAPWalletOAuthResult()
            oAuthResult.error = NSError(
                domain: "OAuthError",
                code: IAPWalletBaseServiceResult.ERROR_CODE_AUTH_PENDING_AGREEMENT,
                userInfo: [NSLocalizedDescriptionKey: "OAuth Params invalid"]
            )
            callback(oAuthResult)
        }
    }

    // MARK: getAuthorizedScopes
    override func getAuthorizedScopes(
        clientId: String, 
        extendedInfo: [String : String] = [:], 
        in context: IAPWalletAPIContext? = nil, 
        callback: @escaping (IAPWalletOAuthScopeQueryResult) -> Void
    ) {
        //The logic to retrieve a list of the authorized scopes
        let authorizedScopes = ["xxx"]
        let oAuthResult = IAPWalletOAuthScopeQueryResult(authorizedScopes: authorizedScopes)
        callback(oAuthResult)
    }

    // MARK: showAuthPage
    override func showAuthPage(
        clientId: String, 
        name: String, 
        logo: String, 
        scopes: Set<String>, 
        extendedInfo: [String : String]? = [:], 
        in context: IAPWalletAPIContext? = nil, 
        callback: @escaping (IAPWalletAuthPageConfirmResult) -> Void
    ) {
        //Show user authorization dialog
        let alertController = UIAlertController(
            title: "xxx auth page", 
            message: "Do you allow this service to get your auth code?", 
            preferredStyle: .alert
        )

        let cancelAction = UIAlertAction(title: "NO", style: .cancel) { _ in
            let oAuthResult = IAPWalletAuthPageConfirmResult()
            oAuthResult.error = NSError(
                domain: "OAuthError", 
                code: IAPWalletBaseServiceResult.ERROR_CODE_USER_CANCEL, 
                userInfo: [NSLocalizedDescriptionKey: "USER CANCEL"]
            )
            callback(oAuthResult)
        }

        let confirmAction = UIAlertAction(title: "YES", style: .default) { _ in
            let cacheAuthKey = "xxx"
            UserDefaults.standard.set(true, forKey: cacheAuthKey)
            callback(IAPWalletAuthPageConfirmResult(referenceAgreementId: "AGREEMENT_ID"))
        }

        alertController.addAction(cancelAction)
        alertController.addAction(confirmAction)

        DispatchQueue.main.async {
            UIApplication.shared.keyWindow?.rootViewController?.dismiss(animated: true, completion: {
                UIApplication.shared.keyWindow?.rootViewController?.present(alertController, animated: true)
            })
        }
    }
}