(Unicode C++) 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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#include <CkJsonObjectW.h>
#include <CkStringBuilderW.h>
#include <CkRestW.h>

void ChilkatSample(void)
    {
    // 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)
    CkJsonObjectW jsonToken;
    jsonToken.LoadFile(L"qa_data/tokens/paypal.json");

    // Build the Authorization request header field value.
    CkStringBuilderW sbAuth;
    // token_type should be "Bearer"
    sbAuth.Append(jsonToken.stringOf(L"token_type"));
    sbAuth.Append(L" ");
    sbAuth.Append(jsonToken.stringOf(L"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.
    CkRestW rest;
    bool bAutoReconnect = true;
    bool success = rest.Connect(L"api.sandbox.paypal.com",443,true,bAutoReconnect);
    if (success != true) {
        wprintf(L"%s\n",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(L"Authorization",sbAuth.getAsString());

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

    // Send the GET request and get the JSON response.
    CkStringBuilderW sbJsonResponse;
    success = rest.FullRequestNoBodySb(L"GET",L"/v1/payments/payment",sbJsonResponse);
    if (success != true) {
        wprintf(L"%s\n",rest.lastErrorText());
        return;
    }

    CkJsonObjectW json;
    json.put_EmitCompact(false);
    json.LoadSb(sbJsonResponse);

    // (optional) Save the entire JSON response to a file to examine if desired..
    CkStringBuilderW sbTemp;
    json.EmitSb(sbTemp);
    sbTemp.WriteFile(L"qa_output/paypal_payments.json",L"utf-8",false);

    wprintf(L"Response Status Code = %d\n",rest.get_ResponseStatusCode());

    // Did we get a 200 success response?
    if (rest.get_ResponseStatusCode() != 200) {
        wprintf(L"%s\n",json.emit());
        wprintf(L"Failed.\n");
        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.
    int numPayments = json.SizeOfArray(L"payments");
    int i = 0;
    while (i < numPayments) {

        json.put_I(i);
        int j = 0;
        int numTransactions = json.SizeOfArray(L"payments[i].transactions");
        while (j < numTransactions) {
            json.put_J(j);
            int numRelatedResources = json.SizeOfArray(L"payments[i].transactions[j].related_resources");
            int k = 0;
            while (k < numRelatedResources) {
                json.put_K(k);
                if (json.HasMember(L"payments[i].transactions[j].related_resources[k].sale") == true) {
                    CkJsonObjectW *jsonSale = json.ObjectOf(L"payments[i].transactions[j].related_resources[k].sale");
                    wprintf(L"sale id: %s\n",jsonSale->stringOf(L"id"));
                    wprintf(L"state: %s\n",jsonSale->stringOf(L"state"));
                    wprintf(L"total: %s\n",jsonSale->stringOf(L"amount.total"));
                    wprintf(L"----\n");
                    delete jsonSale;
                }

                k = k + 1;
            }

            j = j + 1;
        }

        i = i + 1;
    }

    wprintf(L"success\n");
    }