/// <summary>
/// Returns credit-card-collection hidden fields and a JavaScript function call getter that opens a Stripe Checkout modal window. If the window's submit
/// button is clicked, the credit card is charged or otherwise used. Do not execute the getter until after the page tree has been built.
/// </summary>
/// <param name="testPublishableKey">Your test publishable API key. Will be used in non-live installations. Do not pass null.</param>
/// <param name="livePublishableKey">Your live publishable API key. Will be used in live installations. Do not pass null.</param>
/// <param name="name">See https://stripe.com/docs/checkout. Do not pass null.</param>
/// <param name="description">See https://stripe.com/docs/checkout. Do not pass null.</param>
/// <param name="amountInDollars">See https://stripe.com/docs/checkout, but note that this parameter is in dollars, not cents</param>
/// <param name="testSecretKey">Your test secret API key. Will be used in non-live installations. Do not pass null.</param>
/// <param name="liveSecretKey">Your live secret API key. Will be used in live installations. Do not pass null.</param>
/// <param name="successHandler">A method that executes if the credit-card submission is successful. The first parameter is the charge ID and the second
/// parameter is the amount of the charge, in dollars.</param>
/// <param name="prefilledEmailAddressOverride">By default, the email will be prefilled with AppTools.User.Email if AppTools.User is not null. You can
/// override this with either a specified email address (if user is paying on behalf of someone else) or the empty string (to force the user to type in the
/// email address).</param>
public static Tuple <IReadOnlyCollection <EtherealComponentOrElement>, Func <string> > GetCreditCardCollectionHiddenFieldsAndJsFunctionCall(
string testPublishableKey, string livePublishableKey, string name, string description, decimal?amountInDollars, string testSecretKey, string liveSecretKey,
Func <string, decimal, StatusMessageAndDestination> successHandler, string prefilledEmailAddressOverride = null)
{
if (!EwfApp.Instance.RequestIsSecure(HttpContext.Current.Request))
{
throw new ApplicationException("Credit-card collection can only be done from secure pages.");
}
EwfPage.Instance.ClientScript.RegisterClientScriptInclude(typeof(PaymentProcessingStatics), "Stripe Checkout", "https://checkout.stripe.com/checkout.js");
if (amountInDollars.HasValue && amountInDollars.Value.DollarValueHasFractionalCents())
{
throw new ApplicationException("Amount must not include fractional cents.");
}
ResourceInfo successDestination = null;
var postBack = PostBack.CreateFull(
id: PostBack.GetCompositeId("ewfCreditCardCollection", description),
actionGetter: () => new PostBackAction(successDestination));
var token = new DataValue <string>();
var hiddenFieldId = new HiddenFieldId();
List <EtherealComponentOrElement> hiddenFields = new List <EtherealComponentOrElement>();
FormState.ExecuteWithDataModificationsAndDefaultAction(
postBack.ToCollection(),
() => hiddenFields.Add(new EwfHiddenField("", (postBackValue, validator) => token.Value = postBackValue.Value, id: hiddenFieldId).PageComponent));
postBack.AddModificationMethod(
() => {
// We can add support later for customer creation, subscriptions, etc. as needs arise.
if (!amountInDollars.HasValue)
{
throw new ApplicationException("Only simple charges are supported at this time.");
}
StripeCharge response;
try {
response =
new StripeGateway(ConfigurationStatics.IsLiveInstallation ? liveSecretKey : testSecretKey).Post(
new ChargeStripeCustomer
{
Amount = (int)(amountInDollars.Value * 100),
Currency = "usd",
Description = description.Any() ? description : null,
Card = token.Value
});
}
catch (StripeException e) {
if (e.Type == "card_error")
{
throw new DataModificationException(e.Message);
}
throw new ApplicationException("A credit-card charge failed.", e);
}
try {
var messageAndDestination = successHandler(response.Id, amountInDollars.Value);
if (messageAndDestination.Message.Any())
{
EwfPage.AddStatusMessage(StatusMessageType.Info, messageAndDestination.Message);
}
successDestination = messageAndDestination.Destination;
}
catch (Exception e) {
throw new ApplicationException("An exception occurred after a credit card was charged.", e);
}
});
FormAction action = new PostBackFormAction(postBack);
action.AddToPageIfNecessary();
return(Tuple.Create <IReadOnlyCollection <EtherealComponentOrElement>, Func <string> >(
hiddenFields,
() => {
var jsTokenHandler = "function( token, args ) { " + hiddenFieldId.GetJsValueModificationStatements("token.id") + " " + action.GetJsStatements() + " }";
return "StripeCheckout.open( { key: '" + (ConfigurationStatics.IsLiveInstallation ? livePublishableKey : testPublishableKey) + "', token: " +
jsTokenHandler + ", name: '" + name + "', description: '" + description + "', " +
(amountInDollars.HasValue ? "amount: " + amountInDollars.Value * 100 + ", " : "") + "email: '" +
(prefilledEmailAddressOverride ?? (AppTools.User == null ? "" : AppTools.User.Email)) + "' } )";
}));
}