Delphi ActiveX Google Calendar: Change the Color of an Event

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Changes the color of a particular event. The calendar and event are specified by ID. This example changes the color for an event (id = 52e7uk7j7vl5dosj7b25memov0) on the calendar (id = support@chilkatcloud.com).
This changes the event to colorId = "6" which seems to be an orange-ish color..

Documentation: https://developers.google.com/google-apps/calendar/v3/reference/events/patch

var
rest: TChilkatRest;
success: Integer;
oauth2: TChilkatOAuth2;
jsonReq: TChilkatJsonObject;
sbReq: TChilkatStringBuilder;
sbJson: TChilkatStringBuilder;
json: TChilkatJsonObject;
kind: WideString;
etag: WideString;
id: WideString;
status: WideString;
htmlLink: WideString;
created: WideString;
updated: WideString;
summary: WideString;
colorId: WideString;
creatorEmail: WideString;
creatorSelf: Integer;
organizerEmail: WideString;
organizerSelf: Integer;
startDateTime: WideString;
endDateTime: WideString;
iCalUID: WideString;
sequence: Integer;
hangoutLink: WideString;
remindersUseDefault: Integer;

begin
rest := TChilkatRest.Create(Self);

//   Provide a previously obtained OAuth2 access token.
oauth2 := TChilkatOAuth2.Create(Self);
oauth2.AccessToken := 'OAUTH2_ACCESS_TOKEN';
rest.SetAuthOAuth2(oauth2.ControlInterface);

success := rest.Connect('www.googleapis.com',443,1,1);
if (success <> 1) then
  begin
    Memo1.Lines.Add(rest.LastErrorText);
    Exit;
  end;

//  The following code creates the JSON request body.
//  The JSON created by this code is shown below.
jsonReq := TChilkatJsonObject.Create(Self);
jsonReq.UpdateString('colorId','6');

sbReq := TChilkatStringBuilder.Create(Self);
jsonReq.EmitSb(sbReq.ControlInterface);

rest.AddHeader('Content-Type','application/json');

sbJson := TChilkatStringBuilder.Create(Self);
success := rest.FullRequestSb('PATCH','/calendar/v3/calendars/support@chilkatcloud.com/events/52e7uk7j7vl5dosj7b25memov0',sbReq.ControlInterface,sbJson.ControlInterface);
if (success <> 1) then
  begin
    Memo1.Lines.Add(rest.LastErrorText);
    Exit;
  end;

if (rest.ResponseStatusCode <> 200) then
  begin
    Memo1.Lines.Add('Received error response code: ' + IntToStr(rest.ResponseStatusCode));
    Memo1.Lines.Add('Response body:');
    Memo1.Lines.Add(sbJson.GetAsString());
    Exit;
  end;

json := TChilkatJsonObject.Create(Self);
json.LoadSb(sbJson.ControlInterface);

//  The following code parses the JSON response.
//  A sample JSON response is shown below the sample code.

kind := json.StringOf('kind');
etag := json.StringOf('etag');
id := json.StringOf('id');
status := json.StringOf('status');
htmlLink := json.StringOf('htmlLink');
created := json.StringOf('created');
updated := json.StringOf('updated');
summary := json.StringOf('summary');
colorId := json.StringOf('colorId');
creatorEmail := json.StringOf('creator.email');
creatorSelf := json.BoolOf('creator.self');
organizerEmail := json.StringOf('organizer.email');
organizerSelf := json.BoolOf('organizer.self');
startDateTime := json.StringOf('start.dateTime');
endDateTime := json.StringOf('end.dateTime');
iCalUID := json.StringOf('iCalUID');
sequence := json.IntOf('sequence');
hangoutLink := json.StringOf('hangoutLink');
remindersUseDefault := json.BoolOf('reminders.useDefault');

Memo1.Lines.Add('Example Completed.');

Sample JSON Request Body

{
    "colorId": "6"
}

Sample JSON Response Body

{
  "kind": "calendar#event",
  "etag": "\"3021538600038000\"",
  "id": "52e7uk7j7vl5dosj7b25memov0",
  "status": "confirmed",
  "htmlLink": "https://www.google.com/calendar/event?eid=NTJlN3VrN2o3dmw1ZG9zajdiMjVtZW1vdjAgc3VwcG9ydEBjaGlsa2F0Y2xvdWQuY29t",
  "created": "2017-11-08T21:27:50.000Z",
  "updated": "2017-11-15T18:08:20.019Z",
  "summary": "Dentist Appointment",
  "colorId": "6",
  "creator": {
    "email": "support@chilkatcloud.com",
    "self": true
  },
  "organizer": {
    "email": "support@chilkatcloud.com",
    "self": true
  },
  "start": {
    "dateTime": "2017-11-27T10:30:00-06:00"
  },
  "end": {
    "dateTime": "2017-11-27T11:30:00-06:00"
  },
  "iCalUID": "52e7uk7j7vl5dosj7b25memov0@google.com",
  "sequence": 1,
  "hangoutLink": "https://plus.google.com/hangouts/_/chilkatcloud.com/support?hceid=c3VwcG9ydEBjaGlsa2F0Y2xvdWQuY29t.52e7uk7j7vl5dosj7b25memov0",
  "reminders": {
    "useDefault": true
  }
}