(JavaScript) PayPal - Generate Invoice Number

Generates the next invoice number that is available to the user.

Note: This example requires Chilkat v9.5.0.65 or greater.

Note

This example is intended for running within a Chilkat.Js embedded JavaScript engine. All Chilkat JavaScript examples require Chilkat v11.4.0 or greater.

var success = false;

// Note: Requires Chilkat v9.5.0.65 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)
var jsonToken = new CkJsonObject();
jsonToken.LoadFile("qa_data/tokens/paypal.json");

// Build the Authorization request header field value.
var sbAuth = new CkStringBuilder();
// token_type should be "Bearer"
sbAuth.Append(jsonToken.StringOf("token_type"));
sbAuth.Append(" ");
sbAuth.Append(jsonToken.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.
var rest = new CkRest();
var bAutoReconnect = true;
success = rest.Connect("api.sandbox.paypal.com",443,true,bAutoReconnect);
if (success !== true) {
    console.log(rest.LastErrorText);
    return;
}

// ----------------------------------------------------------------------------------------------
// 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..
// ----------------------------------------------------------------------------------------------

// Clear the REST object of any headers or query params from previous requests.
rest.ClearAllHeaders();
rest.ClearAllQueryParams();

rest.AddHeader("Authorization",sbAuth.GetAsString());

// Send the POST request with an emtpy body and get the JSON response.
var sbJsonRequest = new CkStringBuilder();
var sbJsonResponse = new CkStringBuilder();
success = rest.FullRequestSb("POST","/v1/invoicing/invoices/next-invoice-number",sbJsonRequest,sbJsonResponse);
if (success !== true) {
    console.log(rest.LastErrorText);
    return;
}

var json = new CkJsonObject();
json.EmitCompact = false;
json.LoadSb(sbJsonResponse);

console.log("Response Status Code = " + rest.ResponseStatusCode);

// Did we get a 200 success response?
if (rest.ResponseStatusCode !== 200) {
    console.log(json.Emit());
    console.log("Failed.");
    return;
}

// Sample JSON response is shown below.
console.log(json.Emit());
console.log("----------------------");
console.log("Next invoice number: " + json.StringOf("number"));
console.log("success");

// ------------------------------------------------
// A sample JSON response:

// 	{ 
// 	  "number": "0003"
// 	}