Delphi ActiveX Google Calendar: Get Instances of a Recurring Event

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Returns instances of the specified recurring event.
This example gets instances for an event from the calendar having the ID = "support@chilkatcloud.com", where the event ID equals "6li3bfqqq65edprt4ms6vdld2j"

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

var
rest: TChilkatRest;
success: Integer;
oauth2: TChilkatOAuth2;
sbJson: TChilkatStringBuilder;
json: TChilkatJsonObject;
kind: WideString;
etag: WideString;
summary: WideString;
updated: WideString;
timeZone: WideString;
accessRole: WideString;
nextSyncToken: WideString;
i: Integer;
count_i: Integer;
method: WideString;
minutes: Integer;
id: WideString;
status: WideString;
htmlLink: WideString;
created: WideString;
description: WideString;
location: WideString;
creatorEmail: WideString;
creatorSelf: Integer;
organizerEmail: WideString;
organizerSelf: Integer;
startDateTime: WideString;
startTimeZone: WideString;
endDateTime: WideString;
endTimeZone: WideString;
recurringEventId: WideString;
originalStartTimeDateTime: WideString;
originalStartTimeTimeZone: WideString;
iCalUID: WideString;
sequence: Integer;
hangoutLink: WideString;
remindersUseDefault: Integer;
j: Integer;
count_j: 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;

sbJson := TChilkatStringBuilder.Create(Self);
success := rest.FullRequestNoBodySb('GET','/calendar/v3/calendars/support@chilkatcloud.com/events/6li3bfqqq65edprt4ms6vdld2j/instances',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');
summary := json.StringOf('summary');
updated := json.StringOf('updated');
timeZone := json.StringOf('timeZone');
accessRole := json.StringOf('accessRole');
nextSyncToken := json.StringOf('nextSyncToken');
i := 0;
count_i := json.SizeOfArray('defaultReminders');
while i < count_i do
  begin
    json.I := i;
    method := json.StringOf('defaultReminders[i].method');
    minutes := json.IntOf('defaultReminders[i].minutes');
    i := i + 1;
  end;

i := 0;
count_i := json.SizeOfArray('items');
while i < count_i do
  begin
    json.I := i;
    kind := json.StringOf('items[i].kind');
    etag := json.StringOf('items[i].etag');
    id := json.StringOf('items[i].id');
    status := json.StringOf('items[i].status');
    htmlLink := json.StringOf('items[i].htmlLink');
    created := json.StringOf('items[i].created');
    updated := json.StringOf('items[i].updated');
    summary := json.StringOf('items[i].summary');
    description := json.StringOf('items[i].description');
    location := json.StringOf('items[i].location');
    creatorEmail := json.StringOf('items[i].creator.email');
    creatorSelf := json.BoolOf('items[i].creator.self');
    organizerEmail := json.StringOf('items[i].organizer.email');
    organizerSelf := json.BoolOf('items[i].organizer.self');
    startDateTime := json.StringOf('items[i].start.dateTime');
    startTimeZone := json.StringOf('items[i].start.timeZone');
    endDateTime := json.StringOf('items[i].end.dateTime');
    endTimeZone := json.StringOf('items[i].end.timeZone');
    recurringEventId := json.StringOf('items[i].recurringEventId');
    originalStartTimeDateTime := json.StringOf('items[i].originalStartTime.dateTime');
    originalStartTimeTimeZone := json.StringOf('items[i].originalStartTime.timeZone');
    iCalUID := json.StringOf('items[i].iCalUID');
    sequence := json.IntOf('items[i].sequence');
    hangoutLink := json.StringOf('items[i].hangoutLink');
    remindersUseDefault := json.BoolOf('items[i].reminders.useDefault');
    j := 0;
    count_j := json.SizeOfArray('items[i].reminders.overrides');
    while j < count_j do
      begin
        json.J := j;
        method := json.StringOf('items[i].reminders.overrides[j].method');
        minutes := json.IntOf('items[i].reminders.overrides[j].minutes');
        j := j + 1;
      end;

    i := i + 1;
  end;

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

Sample JSON Response Body

{
  "kind": "calendar#events",
  "etag": "\"p33se7k7armnte0g\"",
  "summary": "support@chilkatcloud.com",
  "updated": "2017-11-08T19:40:49.131Z",
  "timeZone": "America/Chicago",
  "accessRole": "owner",
  "defaultReminders": [
    {
      "method": "popup",
      "minutes": 10
    }
  ],
  "nextSyncToken": "CPjj0Ordr9cCEPjj0Ordr9cCGAU=",
  "items": [
    {
      "kind": "calendar#event",
      "etag": "\"3020339874608000\"",
      "id": "6li3bfqqq65edprt4ms6vdld2j_20171111T000000Z",
      "status": "confirmed",
      "htmlLink": "https://www.google.com/calendar/event?eid=NmxpM2JmcXFxNjVlZHBydDRtczZ2ZGxkMmpfMjAxNzExMTFUMDAwMDAwWiBzdXBwb3J0QGNoaWxrYXRjbG91ZC5jb20",
      "created": "2017-11-08T19:35:30.000Z",
      "updated": "2017-11-08T19:40:49.019Z",
      "summary": "TGIF Happy Hour",
      "description": "Friday Night Happy Hour",
      "location": "Shannon's Irish Pub, 428 N Main St, Glen Ellyn, IL 60137, USA",
      "creator": {
        "email": "support@chilkatcloud.com",
        "self": true
      },
      "organizer": {
        "email": "support@chilkatcloud.com",
        "self": true
      },
      "start": {
        "dateTime": "2017-11-10T18:00:00-06:00",
        "timeZone": "America/Chicago"
      },
      "end": {
        "dateTime": "2017-11-10T19:00:00-06:00",
        "timeZone": "America/Chicago"
      },
      "recurringEventId": "6li3bfqqq65edprt4ms6vdld2j",
      "originalStartTime": {
        "dateTime": "2017-11-10T18:00:00-06:00",
        "timeZone": "America/Chicago"
      },
      "iCalUID": "6li3bfqqq65edprt4ms6vdld2j@google.com",
      "sequence": 1,
      "hangoutLink": "https://plus.google.com/hangouts/_/chilkatcloud.com/support?hceid=c3VwcG9ydEBjaGlsa2F0Y2xvdWQuY29t.6li3bfqqq65edprt4ms6vdld2j",
      "reminders": {
        "useDefault": false,
        "overrides": [
          {
            "method": "popup",
            "minutes": 180
          }
        ]
      }
    },
    {
      "kind": "calendar#event",
      "etag": "\"3020339874608000\"",
      "id": "6li3bfqqq65edprt4ms6vdld2j_20171118T000000Z",
      "status": "confirmed",
      "htmlLink": "https://www.google.com/calendar/event?eid=NmxpM2JmcXFxNjVlZHBydDRtczZ2ZGxkMmpfMjAxNzExMThUMDAwMDAwWiBzdXBwb3J0QGNoaWxrYXRjbG91ZC5jb20",
      "created": "2017-11-08T19:35:30.000Z",
      "updated": "2017-11-08T19:40:49.019Z",
      "summary": "TGIF Happy Hour",
      "description": "Friday Night Happy Hour",
      "location": "Shannon's Irish Pub, 428 N Main St, Glen Ellyn, IL 60137, USA",
      "creator": {
        "email": "support@chilkatcloud.com",
        "self": true
      },
      "organizer": {
        "email": "support@chilkatcloud.com",
        "self": true
      },
      "start": {
        "dateTime": "2017-11-17T18:00:00-06:00",
        "timeZone": "America/Chicago"
      },
      "end": {
        "dateTime": "2017-11-17T19:00:00-06:00",
        "timeZone": "America/Chicago"
      },
      "recurringEventId": "6li3bfqqq65edprt4ms6vdld2j",
      "originalStartTime": {
        "dateTime": "2017-11-17T18:00:00-06:00",
        "timeZone": "America/Chicago"
      },
      "iCalUID": "6li3bfqqq65edprt4ms6vdld2j@google.com",
      "sequence": 1,
      "hangoutLink": "https://plus.google.com/hangouts/_/chilkatcloud.com/support?hceid=c3VwcG9ydEBjaGlsa2F0Y2xvdWQuY29t.6li3bfqqq65edprt4ms6vdld2j",
      "reminders": {
        "useDefault": false,
        "overrides": [
          {
            "method": "popup",
            "minutes": 180
          }
        ]
      }
    },
    {
      "kind": "calendar#event",
      "etag": "\"3020339874608000\"",
      "id": "6li3bfqqq65edprt4ms6vdld2j_20171125T000000Z",
      "status": "confirmed",
      "htmlLink": "https://www.google.com/calendar/event?eid=NmxpM2JmcXFxNjVlZHBydDRtczZ2ZGxkMmpfMjAxNzExMjVUMDAwMDAwWiBzdXBwb3J0QGNoaWxrYXRjbG91ZC5jb20",
      "created": "2017-11-08T19:35:30.000Z",
      "updated": "2017-11-08T19:40:49.019Z",
      "summary": "TGIF Happy Hour",
      "description": "Friday Night Happy Hour",
      "location": "Shannon's Irish Pub, 428 N Main St, Glen Ellyn, IL 60137, USA",
      "creator": {
        "email": "support@chilkatcloud.com",
        "self": true
      },
      "organizer": {
        "email": "support@chilkatcloud.com",
        "self": true
      },
      "start": {
        "dateTime": "2017-11-24T18:00:00-06:00",
        "timeZone": "America/Chicago"
      },
      "end": {
        "dateTime": "2017-11-24T19:00:00-06:00",
        "timeZone": "America/Chicago"
      },
      "recurringEventId": "6li3bfqqq65edprt4ms6vdld2j",
      "originalStartTime": {
        "dateTime": "2017-11-24T18:00:00-06:00",
        "timeZone": "America/Chicago"
      },
      "iCalUID": "6li3bfqqq65edprt4ms6vdld2j@google.com",
      "sequence": 1,
      "hangoutLink": "https://plus.google.com/hangouts/_/chilkatcloud.com/support?hceid=c3VwcG9ydEBjaGlsa2F0Y2xvdWQuY29t.6li3bfqqq65edprt4ms6vdld2j",
      "reminders": {
        "useDefault": false,
        "overrides": [
          {
            "method": "popup",
            "minutes": 180
          }
        ]
      }
    },
    {
      "kind": "calendar#event",
      "etag": "\"3020339874608000\"",
      "id": "6li3bfqqq65edprt4ms6vdld2j_20171202T000000Z",
      "status": "confirmed",
      "htmlLink": "https://www.google.com/calendar/event?eid=NmxpM2JmcXFxNjVlZHBydDRtczZ2ZGxkMmpfMjAxNzEyMDJUMDAwMDAwWiBzdXBwb3J0QGNoaWxrYXRjbG91ZC5jb20",
      "created": "2017-11-08T19:35:30.000Z",
      "updated": "2017-11-08T19:40:49.019Z",
      "summary": "TGIF Happy Hour",
      "description": "Friday Night Happy Hour",
      "location": "Shannon's Irish Pub, 428 N Main St, Glen Ellyn, IL 60137, USA",
      "creator": {
        "email": "support@chilkatcloud.com",
        "self": true
      },
      "organizer": {
        "email": "support@chilkatcloud.com",
        "self": true
      },
      "start": {
        "dateTime": "2017-12-01T18:00:00-06:00",
        "timeZone": "America/Chicago"
      },
      "end": {
        "dateTime": "2017-12-01T19:00:00-06:00",
        "timeZone": "America/Chicago"
      },
      "recurringEventId": "6li3bfqqq65edprt4ms6vdld2j",
      "originalStartTime": {
        "dateTime": "2017-12-01T18:00:00-06:00",
        "timeZone": "America/Chicago"
      },
      "iCalUID": "6li3bfqqq65edprt4ms6vdld2j@google.com",
      "sequence": 1,
      "hangoutLink": "https://plus.google.com/hangouts/_/chilkatcloud.com/support?hceid=c3VwcG9ydEBjaGlsa2F0Y2xvdWQuY29t.6li3bfqqq65edprt4ms6vdld2j",
      "reminders": {
        "useDefault": false,
        "overrides": [
          {
            "method": "popup",
            "minutes": 180
          }
        ]
      }
    }
  ]
}