(Delphi ActiveX) QuickBooks - Read an Employee (with Error Response)

Demonstrates how to fetch the information for a specific Quickbooks employee, but tries to fetch using an invalid employee id. Shows the error response and how to parse it.

For more information, see https://developer.intuit.com/app/developer/qbo/docs/api/accounting/all-entities/employee#read-an-employee

Chilkat for Delphi Downloads Chilkat ActiveX DLL for Delphi Chilkat non-ActiveX DLL for Delphi * The examples here use the ActiveX DLL.

uses
    Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
    Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, Chilkat_TLB;

...

procedure TForm1.Button1Click(Sender: TObject);
var
jsonToken: TChilkatJsonObject;
success: Integer;
rest: TChilkatRest;
bAutoReconnect: Integer;
sbAuth: TChilkatStringBuilder;
responseBody: WideString;
json: TChilkatJsonObject;
numErrors: Integer;
i: Integer;

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

// Get our previously obtained OAuth2 access token, which should contain JSON like this:
// {
//   "expires_in": 3600,
//   "x_refresh_token_expires_in": 8726400,
//   "refresh_token": "L011546037639r ... 3vR2DrbOmg0Sdagw",
//   "access_token": "eyJlbmMiOiJBMTI4Q0 ... oETJEMbeggg",
//   "token_type": "bearer"
// }

jsonToken := TChilkatJsonObject.Create(Self);
success := jsonToken.LoadFile('qa_data/tokens/qb-access-token.json');

rest := TChilkatRest.Create(Self);

// Connect using TLS.
// A single REST object, once connected, can be used for many Quickbooks 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.
bAutoReconnect := 1;
success := rest.Connect('sandbox-quickbooks.api.intuit.com',443,1,bAutoReconnect);
if (success <> 1) then
  begin
    Memo1.Lines.Add(rest.LastErrorText);
    Exit;
  end;

sbAuth := TChilkatStringBuilder.Create(Self);
sbAuth.Append('Bearer ');
sbAuth.Append(jsonToken.StringOf('access_token'));
rest.Authorization := sbAuth.GetAsString();

rest.AddHeader('Accept','application/json');
rest.AllowHeaderFolding := 0;

// The company ID is 123146096291789
// The employee ID is 999  (There is no employee with this ID and we should get a 400 response code w/ a response body indicating the error.)
responseBody := rest.FullRequestNoBody('GET','/v3/company/123146096291789/employee/999?minorversion=45');
if (rest.LastMethodSuccess <> 1) then
  begin
    Memo1.Lines.Add(rest.LastErrorText);
    Exit;
  end;

// Load the JSON response into a JSON object for parsing.
// A sample JSON response is shown below.
json := TChilkatJsonObject.Create(Self);
json.Load(responseBody);
json.EmitCompact := 0;
Memo1.Lines.Add(json.Emit());

// A 400 response is what we'd expect if trying to query for a non-existent employee ID
if (rest.ResponseStatusCode <> 400) then
  begin
    Memo1.Lines.Add('Request Header: ');
    Memo1.Lines.Add(rest.LastRequestHeader);
    Memo1.Lines.Add('----');
    Memo1.Lines.Add('Response StatusCode = ' + IntToStr(rest.ResponseStatusCode));
    Memo1.Lines.Add('Response StatusLine: ' + rest.ResponseStatusText);
    Memo1.Lines.Add('Response Header:');
    Memo1.Lines.Add(rest.ResponseHeader);
    Exit;
  end;

// If we got here, the response status code was 400..
// Iterate over the errors..
numErrors := json.SizeOfArray('Fault.Error');
i := 0;
while i < numErrors do
  begin

    json.I := i;
    Memo1.Lines.Add('Message: ' + json.StringOf('Fault.Error[i].Message'));
    Memo1.Lines.Add('Detail: ' + json.StringOf('Fault.Error[i].Detail'));
    Memo1.Lines.Add('code: ' + json.StringOf('Fault.Error[i].code'));
    Memo1.Lines.Add('----');
    i := i + 1;
  end;

// ------------------------------------------------------
// The JSON error response looks like this:

// {
//   "Fault": {
//     "Error": [
//       {
//         "Message": "Object Not Found",
//         "Detail": "Object Not Found : Something you're trying to use has been made inactive. Check the fields with accounts, customers, items, vendors or employees.",
//         "code": "610",
//         "element": ""
//       }
//     ],
//     "type": "ValidationFault"
//   },
//   "time": "2020-03-07T10:21:19.089-08:00"
// }
end;