(Swift 2) PayPal - Find Completed Sales

List payments and find completed payments (sales transactions). Get the sales id, state, and total amount for each.

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

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func chilkatTest() {
    // 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)
    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.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.
    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..
    // ----------------------------------------------------------------------------------------------

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

    rest.AddHeader("Authorization", value: sbAuth.GetAsString())

    // To find sales transactions, we list payments and look for those
    // containing "sale" transactions
    rest.AddQueryParam("count", value: "100")
    rest.AddQueryParam("start_index", value: "0")
    rest.AddQueryParam("sort_by", value: "update_time")
    rest.AddQueryParam("sort_order", value: "asc")

    // Send the GET request and get the JSON response.
    let sbJsonResponse = CkoStringBuilder()
    success = rest.FullRequestNoBodySb("GET", uriPath: "/v1/payments/payment", sb: sbJsonResponse)
    if success != true {
        print("\(rest.LastErrorText)")
        return
    }

    let json = CkoJsonObject()
    json.EmitCompact = false
    json.LoadSb(sbJsonResponse)

    // (optional) Save the entire JSON response to a file to examine if desired..
    let sbTemp = CkoStringBuilder()
    json.EmitSb(sbTemp)
    sbTemp.WriteFile("qa_output/paypal_payments.json", charset: "utf-8", emitBom: false)

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

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

    // We are looking for sales transactions .
    // As shown below, we are looking in the "transactions" for "related_resources"
    // containing "sale" JSON objects. 

    // 	{ 
    // 	  "payments": [
    // 	    { 
    // 	      "id": "PAY-66A12106PU3254228LA3BYKI",
    // 	      "create_time": "2016-11-23T22:46:01Z",
    // 	      "update_time": "2016-11-23T22:46:07Z",
    // 	      "state": "approved",
    // 	      "intent": "sale",
    // 	      "payer": { 
    // 	          ...
    // 	          }
    // 	        ]
    // 	      },
    // 	      "transactions": [
    // 	        { 
    // 	          ...
    // 	          "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",

    // Iterate over the payments and show each sale transaction.
    var numPayments: Int = json.SizeOfArray("payments").intValue
    var i: Int = 0
    while i < numPayments {

        json.I = i
        var j: Int = 0
        var numTransactions: Int = json.SizeOfArray("payments[i].transactions").intValue
        while j < numTransactions {
            json.J = j
            var numRelatedResources: Int = json.SizeOfArray("payments[i].transactions[j].related_resources").intValue
            var k: Int = 0
            while k < numRelatedResources {
                json.K = k
                if json.HasMember("payments[i].transactions[j].related_resources[k].sale") == true {
                    var jsonSale: CkoJsonObject? = json.ObjectOf("payments[i].transactions[j].related_resources[k].sale")
                    print("sale id: \(jsonSale!.StringOf("id"))")
                    print("state: \(jsonSale!.StringOf("state"))")
                    print("total: \(jsonSale!.StringOf("amount.total"))")
                    print("----")
                    jsonSale = nil
                }

                k = k + 1
            }

            j = j + 1
        }

        i = i + 1
    }

    print("success")

}