(Delphi ActiveX) Update a Task's Status to "completed"

Demonstrates how to update a Google task's status to "completed".

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
fac: TCkFileAccess;
accessToken: WideString;
success: Integer;
http: TChilkatHttp;
taskId: WideString;
json: TChilkatJsonObject;
url: WideString;
resp: IChilkatHttpResponse;

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

// Get the previously obtained access token.
// See Get Google Tasks Access Token.

fac := TCkFileAccess.Create(Self);
accessToken := fac.ReadEntireTextFile('qa_data/tokens/googleTasks.txt','utf-8');
if (fac.LastMethodSuccess <> 1) then
  begin
    Memo1.Lines.Add(fac.LastErrorText);
    Exit;
  end;

http := TChilkatHttp.Create(Self);

http.AuthToken := accessToken;

taskId := 'MDM4MzQ4NTA3NDQwMDUxMzQ2OTQ6NzAwOTA4MDA1NzU2ODYwMzoyMDg3OTcyMDA1MTQ5NTA0';

// Create the JSON to update the task status to completed.
json := TChilkatJsonObject.Create(Self);
json.UpdateString('id',taskId);
json.UpdateString('status','completed');

// Specify the ID's for both the task list and the task.
http.SetUrlVar('tasklist','MDM4MzQ4NTA3NDQwMDUxMzQ2OTQ6NzAwOTA4MDA1NzU2ODYwMzow');
http.SetUrlVar('task',taskId);

url := 'https://www.googleapis.com/tasks/v1/lists/{$tasklist}/tasks/{$task}';
resp := http.PText('PUT',url,json.Emit(),'utf-8','application/json',0,0);
if (http.LastMethodSuccess = 0) then
  begin
    Memo1.Lines.Add(http.LastErrorText);
    Exit;
  end;

// Show the response body.
Memo1.Lines.Add(resp.BodyStr);

// Examine the response status code.
Memo1.Lines.Add('response status code: ' + IntToStr(resp.StatusCode));

// Sample response:
// Use this online tool to generate parsing code from sample JSON: 
// Generate Parsing Code from JSON

// 
// {
//  "kind": "tasks#task",
//  "id": "MDM4MzQ4NTA3NDQwMDUxMzQ2OTQ6NzAwOTA4MDA1NzU2ODYwMzoyMDg3OTcyMDA1MTQ5NTA0",
//  "etag": "\"84_7Cubo3y98GMV9bE3zQclHxhc/MTQyMDUzMzQ4MA\"",
//  "title": "Get haircut",
//  "updated": "2019-04-04T18:07:58.000Z",
//  "selfLink": "https://www.googleapis.com/tasks/v1/lists/MDM4MzQ4NTA3NDQwMDUxMzQ2OTQ6NzAwOTA4MDA1NzU2ODYwMzow/tasks/MDM4MzQ4NTA3NDQwMDUxMzQ2OTQ6NzAwOTA4MDA1NzU2ODYwMzoyMDg3OTcyMDA1MTQ5NTA0",
//  "position": "00000000001610612734",
//  "notes": "Check in online first.",
//  "status": "completed",
//  "completed": "2019-04-04T18:38:56.000Z"
// }
// 
// response status code: 200
end;