Integrasi PayPal Bagian 2: REST API PayPal

public static Payment CreatePayment(string baseUrl, string intent)

{

    // ### Api Context

    // Pass in a `APIContext` object to authenticate 

    // the call and to send a unique request id 

    // (that ensures idempotency). The SDK generates

    // a request id if you do not pass one explicitly. 

    var apiContext = PayPalConfiguration.GetAPIContext();

    // Payment Resource

    var payment = new Payment()

    {

        intent = intent,    // `sale` or `authorize`

        payer = new Payer() { payment_method = "paypal" },

        transactions = GetTransactionsList(),

        redirect_urls = GetReturnUrls(baseUrl, intent)

    };

    // Create a payment using a valid APIContext

    var createdPayment = payment.Create(apiContext);

    return createdPayment;

}

private static List<Transaction> GetTransactionsList()

{

    // A transaction defines the contract of a payment

    // what is the payment for and who is fulfilling it. 

    var transactionList = new List<Transaction>();

    // The Payment creation API requires a list of Transaction; 

    // add the created Transaction to a List

    transactionList.Add(new Transaction()

    {

        description = "Transaction description.",

        invoice_number = GetRandomInvoiceNumber(),

        amount = new Amount()

        {

            currency = "USD",

            total = "100.00",       // Total must be equal to sum of shipping, tax and subtotal.

            details = new Details() // Details: Let's you specify details of a payment amount.

            {

                tax = "15",

                shipping = "10",

                subtotal = "75"

            }

        },

        item_list = new ItemList()

        {

            items = new List<Item>()

            {

                new Item()

                {

                    name = "Item Name",

                    currency = "USD",

                    price = "15",

                    quantity = "5",

                    sku = "sku"

                }

            }

        }

    });

    return transactionList;

}

private static RedirectUrls GetReturnUrls(string baseUrl, string intent)

{

    var returnUrl = intent == "sale" ? "/Home/PaymentSuccessful" : "/Home/AuthorizeSuccessful";

    // Redirect URLS

    // These URLs will determine how the user is redirected from PayPal 

    // once they have either approved or canceled the payment.

    return new RedirectUrls()

    {

        cancel_url = baseUrl + "/Home/PaymentCancelled",

        return_url = baseUrl + returnUrl

    };

}

public static Payment ExecutePayment(string paymentId, string payerId)

{

    // ### Api Context

    // Pass in a `APIContext` object to authenticate 

    // the call and to send a unique request id 

    // (that ensures idempotency). The SDK generates

    // a request id if you do not pass one explicitly. 

    var apiContext = PayPalConfiguration.GetAPIContext();

    var paymentExecution = new PaymentExecution() { payer_id = payerId };

    var payment = new Payment() { id = paymentId };

    // Execute the payment.

    var executedPayment = payment.Execute(apiContext, paymentExecution);

    return executedPayment;

}

public IActionResult CreatePayment()

{

    var payment = PayPalPaymentService.CreatePayment(GetBaseUrl(), "sale");

    return Redirect(payment.GetApprovalUrl());

}

public IActionResult PaymentCancelled()

{

    // TODO: Handle cancelled payment

    return RedirectToAction("Error");

}

public IActionResult PaymentSuccessful(string paymentId, string token, string PayerID)

{

    // Execute Payment

    var payment = PayPalPaymentService.ExecutePayment(paymentId, PayerID);

    return View();

}

public static Capture CapturePayment(string paymentId)

{

    var apiContext = PayPalConfiguration.GetAPIContext();

    var payment = Payment.Get(apiContext, paymentId);

    var auth = payment.transactions[0].related_resources[0].authorization;

    // Specify an amount to capture.  By setting 'is_final_capture' to true, all remaining funds held by the authorization will be released from the funding instrument.

    var capture = new Capture()

    {

        amount = new Amount()

        {

            currency = "USD",

            total = "4.54"

        },

        is_final_capture = true

    };

    // Capture an authorized payment by POSTing to

    // URI v1/payments/authorization/{authorization_id}/capture

    var responseCapture = auth.Capture(apiContext, capture);

    return responseCapture;

}

public IActionResult AuthorizePayment()

{

    var payment = PayPalPaymentService.CreatePayment(GetBaseUrl(), "authorize");

    return Redirect(payment.GetApprovalUrl());

}

public IActionResult AuthorizeSuccessful(string paymentId, string token, string PayerID)

{

    // Capture Payment

    var capture = PayPalPaymentService.CapturePayment(paymentId);

    return View();

}

// Define the plan and attach the payment definitions and merchant preferences.

// More Information: https://developer.paypal.com/webapps/developer/docs/api/#create-a-plan

var billingPlan = new Plan

{

    name = "Tuts+ Plus",

    description = "Monthly plan for courses.",

    type = "fixed",

    // Define the merchant preferences.

    // More Information: https://developer.paypal.com/webapps/developer/docs/api/#merchantpreferences-object

    merchant_preferences = new MerchantPreferences()

    {

        setup_fee = GetCurrency("0"), // $0

        return_url = "returnURL", // Retrieve from config

        cancel_url = "cancelURL", // Retrieve from config

        auto_bill_amount = "YES",

        initial_fail_amount_action = "CONTINUE",

        max_fail_attempts = "0"

    },

    payment_definitions = new List<PaymentDefinition>

    {

        // Define a trial plan that will only charge $9.99 for the first

        // month. After that, the standard plan will take over for the

        // remaining 11 months of the year.

        new PaymentDefinition()

        {

            name = "Trial Plan",

            type = "TRIAL",

            frequency = "MONTH",

            frequency_interval = "1",

            amount = GetCurrency("0"), // Free for the 1st month

            cycles = "1",

            charge_models = new List<ChargeModel>

            {

                new ChargeModel()

                {

                    type = "TAX",

                    amount = GetCurrency("1.65") // If we need to charge Tax

                },

                new ChargeModel()

                {

                    type = "SHIPPING",

                    amount = GetCurrency("9.99") // If we need to charge for Shipping

                }

            }

        },

        // Define the standard payment plan. It will represent a monthly

        // plan for $19.99 USD that charges once month for 11 months.

        new PaymentDefinition

        {

            name = "Standard Plan",

            type = "REGULAR",

            frequency = "MONTH",

            frequency_interval = "1",

            amount = GetCurrency("15.00"),

            // > NOTE: For `IFNINITE` type plans, `cycles` should be 0 for a `REGULAR` `PaymentDefinition` object.

            cycles = "11",

            charge_models = new List<ChargeModel>

            {

                new ChargeModel

                {

                    type = "TAX",

                    amount = GetCurrency("2.47")

                },

                new ChargeModel()

                {

                    type = "SHIPPING",

                    amount = GetCurrency("9.99")

                }

            }

        }

    }

};

// Get PayPal Config

var apiContext = PayPalConfiguration.GetAPIContext();

// Create Plan

plan.Create(apiContext);

// Activate the plan

var patchRequest = new PatchRequest()

{

    new Patch()

    {

        op = "replace",

        path = "/",

        value = new Plan() { state = "ACTIVE" }

    }

};

plan.Update(apiContext, patchRequest);

public static Plan CreatePlanObject(string planName, string planDescription, string returnUrl, string cancelUrl,

    string frequency, int frequencyInterval, decimal planPrice,

    decimal shippingAmount = 0, decimal taxPercentage = 0, bool trial = false, int trialLength = 0, decimal trialPrice = 0)

{

    // Define the plan and attach the payment definitions and merchant preferences.

    // More Information: https://developer.paypal.com/docs/rest/api/payments.billing-plans/

    return new Plan

    {

        name = planName,

        description = planDescription,

        type = PlanType.Fixed,

        // Define the merchant preferences.

        // More Information: https://developer.paypal.com/webapps/developer/docs/api/#merchantpreferences-object

        merchant_preferences = new MerchantPreferences()

        {

            setup_fee = GetCurrency("1"),

            return_url = returnUrl,

            cancel_url = cancelUrl,

            auto_bill_amount = "YES",

            initial_fail_amount_action = "CONTINUE",

            max_fail_attempts = "0"

        },

        payment_definitions = GetPaymentDefinitions(trial, trialLength, trialPrice, frequency, frequencyInterval, planPrice, shippingAmount, taxPercentage)

    };

}

private static List<PaymentDefinition> GetPaymentDefinitions(bool trial, int trialLength, decimal trialPrice,

    string frequency, int frequencyInterval, decimal planPrice, decimal shippingAmount, decimal taxPercentage)

{

    var paymentDefinitions = new List<PaymentDefinition>();

    if (trial)

    {

        // Define a trial plan that will charge 'trialPrice' for 'trialLength'

        // After that, the standard plan will take over.

        paymentDefinitions.Add(

            new PaymentDefinition()

            {

                name = "Trial",

                type = "TRIAL",

                frequency = frequency,

                frequency_interval = frequencyInterval.ToString(),

                amount = GetCurrency(trialPrice.ToString()),

                cycles = trialLength.ToString(),

                charge_models = GetChargeModels(trialPrice, shippingAmount, taxPercentage)

            });

    }

    // Define the standard payment plan. It will represent a 'frequency' (monthly, etc)

    // plan for 'planPrice' that charges 'planPrice' (once a month) for #cycles.

    var regularPayment = new PaymentDefinition

    {

        name = "Standard Plan",

        type = "REGULAR",

        frequency = frequency,

        frequency_interval = frequencyInterval.ToString(),

        amount = GetCurrency(planPrice.ToString()),

        // > NOTE: For `IFNINITE` type plans, `cycles` should be 0 for a `REGULAR` `PaymentDefinition` object.

        cycles = "11",

        charge_models = GetChargeModels(trialPrice, shippingAmount, taxPercentage)

    };

    paymentDefinitions.Add(regularPayment);

    return paymentDefinitions;

}

private static List<ChargeModel> GetChargeModels(decimal planPrice, decimal shippingAmount, decimal taxPercentage)

{

    // Create the Billing Plan

    var chargeModels = new List<ChargeModel>();

    if (shippingAmount > 0)

    {

        chargeModels.Add(new ChargeModel()

        {

            type = "SHIPPING",

            amount = GetCurrency(shippingAmount.ToString())

        });

    }

    if (taxPercentage > 0)

    {

        chargeModels.Add(new ChargeModel()

        {

            type = "TAX",

            amount = GetCurrency(String.Format("{0:f2}", planPrice * taxPercentage / 100))

        });

    }

    return chargeModels;

}

public static void UpdateBillingPlan(string planId, string path, object value)

{

    // PayPal Authentication tokens

    var apiContext = PayPalConfiguration.GetAPIContext();

    // Retrieve Plan

    var plan = Plan.Get(apiContext, planId);

    // Activate the plan

    var patchRequest = new PatchRequest()

    {

        new Patch()

        {

            op = "replace",

            path = path,

            value = value

        }

    };

    plan.Update(apiContext, patchRequest);

}

UpdateBillingPlan(

    planId: "P-5FY40070P6526045UHFWUVEI", 

    path: "/", 

    value: new Plan { description = "new description" });

public IActionResult Subscribe()

{

    var plan = PayPalSubscriptionsService.CreateBillingPlan("Tuts+ Plan", "Test plan for this article", GetBaseUrl());

    var subscription = PayPalSubscriptionsService.CreateBillingAgreement(plan.id, 

        new PayPal.Api.ShippingAddress

        {

            city = "London", 

            line1 = "line 1",

            postal_code = "SW1A 1AA",

            country_code = "GB"

        }, "Pedro Alonso", "Tuts+", DateTime.Now);

    return Redirect(subscription.GetApprovalUrl());

}

public IActionResult SubscribeSuccess(string token)

{

    // Execute approved agreement

    PayPalSubscriptionsService.ExecuteBillingAgreement(token);

    return View();

}

public IActionResult SubscribeCancel(string token)

{

    // TODO: Handle cancelled payment

    return RedirectToAction("Error");

}

public static Agreement CreateBillingAgreement(string planId, ShippingAddress shippingAddress, 

    string name, string description, DateTime startDate)

{

    // PayPal Authentication tokens

    var apiContext = PayPalConfiguration.GetAPIContext();

    var agreement = new Agreement()

    {

        name = name,

        description = description,

        start_date = startDate.ToString("yyyy-MM-ddTHH:mm:ss") + "Z",

        payer = new Payer() { payment_method = "paypal" },

        plan = new Plan() { id = planId },

        shipping_address = shippingAddress

    };

    var createdAgreement = agreement.Create(apiContext);

    return createdAgreement;

}

public static void ExecuteBillingAgreement(string token)

{

    // PayPal Authentication tokens

    var apiContext = PayPalConfiguration.GetAPIContext();

    var agreement = new Agreement() { token = token };

    var executedAgreement = agreement.Execute(apiContext);

}

public static void SuspendBillingAgreement(string agreementId)

{

    var apiContext = PayPalConfiguration.GetAPIContext();

    var agreement = new Agreement() { id = agreementId };

    agreement.Suspend(apiContext, new AgreementStateDescriptor()

        { note = "Suspending the agreement" });

}

public static void ReactivateBillingAgreement(string agreementId)

{

    var apiContext = PayPalConfiguration.GetAPIContext();

    var agreement = new Agreement() { id = agreementId };

    agreement.ReActivate(apiContext, new AgreementStateDescriptor()

        { note = "Reactivating the agreement" });

}

public static void CancelBillingAgreement(string agreementId)

{

    var apiContext = PayPalConfiguration.GetAPIContext();

    var agreement = new Agreement() { id = agreementId };

    agreement.Cancel(apiContext, new AgreementStateDescriptor()

        { note = "Cancelling the agreement" });

}