Pascal (Lazarus/Delphi)

Quickbooks Delete an Invoice

See more QuickBooks Examples

Demonstrates how to delete an invoice using the Quickbooks REST API. Pascal (Lazarus/Delphi)

program ChilkatDemo;

// Demonstrates using the Chilkat Pascal wrapper via the C bridge DLL.
// Builds as a console application under Lazarus (FPC) or Delphi.

{$IFDEF FPC}
  {$MODE DELPHI}
{$ENDIF}
{$APPTYPE CONSOLE}

uses
  {$IFDEF UNIX}
  cthreads,
  {$ENDIF}
  SysUtils,
  CkDllLoader,
  Chilkat.StringBuilder,
  Chilkat.Rest,
  Chilkat.JsonObject;

// ---------------------------------------------------------------------------

procedure RunDemo;
var
  success: Boolean;
  jsonToken: TJsonObject;
  rest: TRest;
  bTls: Boolean;
  port: Integer;
  bAutoReconnect: Boolean;
  sbAuth: TStringBuilder;
  jsonReq: TJsonObject;
  sbRequestBody: TStringBuilder;
  sbResponseBody: TStringBuilder;
  respStatusCode: Integer;
  jsonResponse: TJsonObject;
  InvoiceStatus: string;
  InvoiceDomain: string;
  InvoiceId: string;
  time: string;

begin
  success := False;

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

  //  First get our previously obtained OAuth2 access token.
  jsonToken := TJsonObject.Create;
  success := jsonToken.LoadFile('qa_data/tokens/qb-access-token.json');

  rest := TRest.Create;

  //  Connect to the REST server.
  bTls := True;
  port := 443;
  bAutoReconnect := True;
  success := rest.Connect('sandbox-quickbooks.api.intuit.com',port,bTls,bAutoReconnect);

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

  //  --------------------------------------------------------------------------
  //  Note: The above code to setup the initial REST connection
  //  can be done once.  After connecting, any number of REST calls can be made.
  //  If the connection is lost, the next REST method call will automatically
  //  reconnect if needed.
  //  --------------------------------------------------------------------------

  //  Create the following JSON:

  //  {
  //    "SyncToken": "3",
  //    "Id": "33"
  //  }
  //  
  //  Use the this online tool to generate the code from sample JSON: 
  //  Generate Code to Create JSON

  jsonReq := TJsonObject.Create;
  jsonReq.UpdateString('SyncToken','3');
  jsonReq.UpdateString('Id','33');

  sbRequestBody := TStringBuilder.Create;
  jsonReq.EmitSb(sbRequestBody);

  rest.AddHeader('Content-Type','application/json');
  rest.AddHeader('Accept','application/json');
  rest.AllowHeaderFolding := False;

  sbResponseBody := TStringBuilder.Create;
  success := rest.FullRequestSb('POST','/v3/company/<realmID>/invoice?operation=delete',sbRequestBody,sbResponseBody);
  if (success <> True) then
    begin
      WriteLn(rest.LastErrorText);
      Exit;
    end;

  respStatusCode := rest.ResponseStatusCode;

  //  Success is indicated by a 200 response status code.
  WriteLn('response status code = ' + respStatusCode);

  jsonResponse := TJsonObject.Create;
  jsonResponse.LoadSb(sbResponseBody);
  jsonResponse.EmitCompact := False;
  WriteLn(jsonResponse.Emit());

  if (rest.ResponseStatusCode <> 200) then
    begin
      WriteLn('Failed.');
      Exit;
    end;

  //  Sample output...
  //  (See the parsing code below..)
  //  
  //  Use the this online tool to generate parsing code from sample JSON: 
  //  Generate Parsing Code from JSON

  //  {
  //    "Invoice": {
  //      "status": "Deleted",
  //      "domain": "QBO",
  //      "Id": "33"
  //    },
  //    "time": "2013-03-15T00:18:15.322-07:00"
  //  }
  //  

  InvoiceStatus := jsonResponse.StringOf('Invoice.status');
  InvoiceDomain := jsonResponse.StringOf('Invoice.domain');
  InvoiceId := jsonResponse.StringOf('Invoice.Id');
  time := jsonResponse.StringOf('time');


  jsonToken.Free;
  rest.Free;
  sbAuth.Free;
  jsonReq.Free;
  sbRequestBody.Free;
  sbResponseBody.Free;
  jsonResponse.Free;

end;

// ---------------------------------------------------------------------------

begin

  try
    RunDemo;
  except
    on E: Exception do
      WriteLn('Unhandled exception: ', E.ClassName, ': ', E.Message);
  end;

  WriteLn;
  {$IFDEF MSWINDOWS}
  WriteLn('Press Enter to exit...');
  ReadLn;
  {$ENDIF}
end.