(Swift 3,4,5...) PayPal Send Invoice

Sends a PayPal invoice to a customer.

See also Send Invoice

Chilkat Downloads for the Swift Programming Language MAC OS X (Cocoa) Objective-C/Swift Libs iOS Objective-C/Swift Libs

func chilkatTest() {
    // 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)
    let jsonToken = CkoJsonObject()!
    jsonToken.loadFile("qa_data/tokens/paypal.json")

    // Build the Authorization request header field value.
    let sbAuth = CkoStringBuilder()!
    // token_type should be "Bearer"
    sbAuth.append(jsonToken.string(of: "token_type"))
    sbAuth.append(" ")
    sbAuth.append(jsonToken.string(of: "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.
    let rest = CkoRest()!
    var bAutoReconnect: Bool = true
    var success: Bool = rest.connect("api.sandbox.paypal.com", port: 443, tls: true, autoReconnect: bAutoReconnect)
    if success != true {
        print("\(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..
    // ----------------------------------------------------------------------------------------------

    // Build a path using a draft invoice ID.
    let sbPath = CkoStringBuilder()!
    sbPath.append("/v1/invoicing/invoices/invoice_id/send")
    var numReplacements: Int = sbPath.replace("invoice_id", replacement: "INV2-QCHR-QHSD-M2VU-AVXC").intValue

    rest.addHeader("Authorization", value: sbAuth.getAsString())
    rest.addQueryParam("notify_merchant", value: "true")

    var responseBody: String? = rest.fullRequestFormUrlEncoded("POST", uriPath: sbPath.getAsString())
    if rest.lastMethodSuccess != true {
        print("\(rest.lastErrorText!)")
        return
    }

    print("Response Status Code = \(rest.responseStatusCode.intValue)")

    // Did we get a 202 accepted response?
    if rest.responseStatusCode.intValue != 202 {
        print("\(responseBody!)")
        print("Failed.")
        return
    }

    // If the 202 response is received, the response body would be empty...
    print("Success.")

}