(Lianja) PayPal - Create Direct Credit Card Payment

Creates a direct credit card payment where your application passes the credit card, shipping, and payment information to PayPal.

Note: For sandbox calls, you can use the credit card numbers provided in your sandbox test accounts.

Note: This is an example where you handle the card data directly, and therefore you would need to ensure you are PCI compliant. There are other ways to create a payment where your application does NOT handle the credit card data directly.

Note: This example requires Chilkat v9.5.0.64 or greater.

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// Note: Requires Chilkat v9.5.0.64 or greater.

// This requires the Chilkat API to have been previously unlocked.
// See Global Unlock Sample for sample code.

// Load our previously obtained access token. (see PayPal OAuth2 Access Token)
loJsonToken = createobject("CkJsonObject")
loJsonToken.LoadFile("qa_data/tokens/paypal.json")

// Build the Authorization request header field value.
loSbAuth = createobject("CkStringBuilder")
// token_type should be "Bearer"
loSbAuth.Append(loJsonToken.StringOf("token_type"))
loSbAuth.Append(" ")
loSbAuth.Append(loJsonToken.StringOf("access_token"))

// Make the initial connection.
// A single REST object, once connected, can be used for many PayPal REST API calls.
// The auto-reconnect indicates that if the already-established HTTPS connection is closed,
// then it will be automatically re-established as needed.
loRest = createobject("CkRest")
llBAutoReconnect = .T.
llSuccess = loRest.Connect("api.sandbox.paypal.com",443,.T.,llBAutoReconnect)
if (llSuccess <> .T.) then
    ? loRest.LastErrorText
    release loJsonToken
    release loSbAuth
    release loRest
    return
endif

// ----------------------------------------------------------------------------------------------
// The code above this comment could be placed inside a function/subroutine within the application
// because the connection does not need to be made for every request.  Once the connection is made
// the app may send many requests..
// ----------------------------------------------------------------------------------------------

// Build the JSON containing the credit card data and transaction information.
loJson = createobject("CkJsonObject")
loJson.EmitCompact = .F.
loJson.UpdateString("intent","sale")
loJson.UpdateString("payer.payment_method","credit_card")
loJson.UpdateString("payer.funding_instruments[0].credit_card.number","4032031087659974")
loJson.UpdateString("payer.funding_instruments[0].credit_card.type","visa")
// Do NOT include a leading zero.  For example, do not use "09" for the month.
loJson.UpdateNumber("payer.funding_instruments[0].credit_card.expire_month","9")
loJson.UpdateNumber("payer.funding_instruments[0].credit_card.expire_year","2021")
loJson.UpdateNumber("payer.funding_instruments[0].credit_card.cvv2","111")
loJson.UpdateString("payer.funding_instruments[0].credit_card.first_name","Joe")
loJson.UpdateString("payer.funding_instruments[0].credit_card.last_name","Buyer")
loJson.UpdateString("transactions[0].amount.total","7.47")
loJson.UpdateString("transactions[0].amount.currency","USD")
loJson.UpdateString("transactions[0].description","This is the payment transaction description.")

? loJson.Emit()

// The JSON created by the above code is this:

// 	{ 
// 	  "intent": "sale",
// 	  "payer": { 
// 	    "payment_method": "credit_card",
// 	    "funding_instruments": [
// 	      { 
// 	        "credit_card": { 
// 	          "number": "4032031087659974",
// 	          "type": "visa",
// 	          "expire_month": 9,
// 	          "expire_year": 2021,
// 	          "cvv2": 111,
// 	          "first_name": "Joe",
// 	          "last_name": "Buyer"
// 	        }
// 	      }
// 	    ]
// 	  },
// 	  "transactions": [
// 	    { 
// 	      "amount": { 
// 	        "total": "7.47",
// 	        "currency": "USD"
// 	      },
// 	      "description": "This is the payment transaction description."
// 	    }
// 	  ]
// 	}

loRest.AddHeader("Authorization",loSbAuth.GetAsString())
loRest.AddHeader("Content-Type","application/json")

// Send the POST request containign the JSON in the request body, and get the JSON response.
loSbJsonRequest = createobject("CkStringBuilder")
loJson.EmitCompact = .T.
loJson.EmitSb(loSbJsonRequest)
loSbJsonResponse = createobject("CkStringBuilder")
llSuccess = loRest.FullRequestSb("POST","/v1/payments/payment",loSbJsonRequest,loSbJsonResponse)
if (llSuccess <> .T.) then
    ? loRest.LastErrorText
    release loJsonToken
    release loSbAuth
    release loRest
    release loJson
    release loSbJsonRequest
    release loSbJsonResponse
    return
endif

loJson.EmitCompact = .F.
loJson.LoadSb(loSbJsonResponse)

? "Response Status Code = " + str(loRest.ResponseStatusCode)

// Did we get a 201 success response?
if (loRest.ResponseStatusCode <> 201) then
    ? loJson.Emit()
    ? "Failed."
    release loJsonToken
    release loSbAuth
    release loRest
    release loJson
    release loSbJsonRequest
    release loSbJsonResponse
    return
endif

// Sample response JSON is shown below.
? loJson.Emit()

// Demonstrate how to access a few parts of the JSON response..
? "cc number: " + loJson.StringOf("payer.funding_instruments[0].credit_card.number")
? "subtotal: " + loJson.StringOf("transactions[0].amount.details.subtotal")
? "refund href: " + loJson.StringOf("transactions[0].related_resources[0].sale.links[1].href")

// 	{ 
// 	  "id": "PAY-66A12106PU3254228LA3BYKI",
// 	  "create_time": "2016-11-23T22:46:01Z",
// 	  "update_time": "2016-11-23T22:46:07Z",
// 	  "state": "approved",
// 	  "intent": "sale",
// 	  "payer": { 
// 	    "payment_method": "credit_card",
// 	    "funding_instruments": [
// 	      { 
// 	        "credit_card": { 
// 	          "type": "visa",
// 	          "number": "xxxxxxxxxxxx9974",
// 	          "expire_month": "9",
// 	          "expire_year": "2021",
// 	          "first_name": "Joe",
// 	          "last_name": "Buyer"
// 	        }
// 	      }
// 	    ]
// 	  },
// 	  "transactions": [
// 	    { 
// 	      "amount": { 
// 	        "total": "7.47",
// 	        "currency": "USD",
// 	        "details": { 
// 	          "subtotal": "7.47"
// 	        }
// 	      },
// 	      "description": "This is the payment transaction description.",
// 	      "related_resources": [
// 	        { 
// 	          "sale": { 
// 	            "id": "70L88278E6781074B",
// 	            "create_time": "2016-11-23T22:46:01Z",
// 	            "update_time": "2016-11-23T22:46:07Z",
// 	            "amount": { 
// 	              "total": "7.47",
// 	              "currency": "USD"
// 	            },
// 	            "state": "completed",
// 	            "parent_payment": "PAY-66A12106PU3254228LA3BYKI",
// 	            "links": [
// 	              { 
// 	                "href": "https://api.sandbox.paypal.com/v1/payments/sale/70L88278E6781074B",
// 	                "rel": "self",
// 	                "method": "GET"
// 	              },
// 	              { 
// 	                "href": "https://api.sandbox.paypal.com/v1/payments/sale/70L88278E6781074B/refund",
// 	                "rel": "refund",
// 	                "method": "POST"
// 	              },
// 	              { 
// 	                "href": "https://api.sandbox.paypal.com/v1/payments/payment/PAY-66A12106PU3254228LA3BYKI",
// 	                "rel": "parent_payment",
// 	                "method": "GET"
// 	              }
// 	            ],
// 	            "fmf_details": {},
// 	            "processor_response": { 
// 	              "avs_code": "X",
// 	              "cvv_code": "M"
// 	            }
// 	          }
// 	        }
// 	      ]
// 	    }
// 
// 	  ],
// 	  "links": [
// 	    { 
// 	      "href": "https://api.sandbox.paypal.com/v1/payments/payment/PAY-66A12106PU3254228LA3BYKI",
// 	      "rel": "self",
// 	      "method": "GET"
// 	    }
// 	  ]
// 	}
// 


release loJsonToken
release loSbAuth
release loRest
release loJson
release loSbJsonRequest
release loSbJsonResponse