Delphi DLL 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: HCkRest;
success: Boolean;
oauth2: HCkOAuth2;
sbJson: HCkStringBuilder;
json: HCkJsonObject;
kind: PWideChar;
etag: PWideChar;
summary: PWideChar;
updated: PWideChar;
timeZone: PWideChar;
accessRole: PWideChar;
nextSyncToken: PWideChar;
i: Integer;
count_i: Integer;
method: PWideChar;
minutes: Integer;
id: PWideChar;
status: PWideChar;
htmlLink: PWideChar;
created: PWideChar;
description: PWideChar;
location: PWideChar;
creatorEmail: PWideChar;
creatorSelf: Boolean;
organizerEmail: PWideChar;
organizerSelf: Boolean;
startDateTime: PWideChar;
startTimeZone: PWideChar;
endDateTime: PWideChar;
endTimeZone: PWideChar;
recurringEventId: PWideChar;
originalStartTimeDateTime: PWideChar;
originalStartTimeTimeZone: PWideChar;
iCalUID: PWideChar;
sequence: Integer;
hangoutLink: PWideChar;
remindersUseDefault: Boolean;
j: Integer;
count_j: Integer;

begin
rest := CkRest_Create();

//   Provide a previously obtained OAuth2 access token.
oauth2 := CkOAuth2_Create();
CkOAuth2_putAccessToken(oauth2,'OAUTH2_ACCESS_TOKEN');
CkRest_SetAuthOAuth2(rest,oauth2);

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

sbJson := CkStringBuilder_Create();
success := CkRest_FullRequestNoBodySb(rest,'GET','/calendar/v3/calendars/support@chilkatcloud.com/events/6li3bfqqq65edprt4ms6vdld2j/instances',sbJson);
if (success <> True) then
  begin
    Memo1.Lines.Add(CkRest__lastErrorText(rest));
    Exit;
  end;

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

json := CkJsonObject_Create();
CkJsonObject_LoadSb(json,sbJson);

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

kind := CkJsonObject__stringOf(json,'kind');
etag := CkJsonObject__stringOf(json,'etag');
summary := CkJsonObject__stringOf(json,'summary');
updated := CkJsonObject__stringOf(json,'updated');
timeZone := CkJsonObject__stringOf(json,'timeZone');
accessRole := CkJsonObject__stringOf(json,'accessRole');
nextSyncToken := CkJsonObject__stringOf(json,'nextSyncToken');
i := 0;
count_i := CkJsonObject_SizeOfArray(json,'defaultReminders');
while i < count_i do
  begin
CkJsonObject_putI(json,i);
    method := CkJsonObject__stringOf(json,'defaultReminders[i].method');
    minutes := CkJsonObject_IntOf(json,'defaultReminders[i].minutes');
    i := i + 1;
  end;

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

    i := i + 1;
  end;

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

CkRest_Dispose(rest);
CkOAuth2_Dispose(oauth2);
CkStringBuilder_Dispose(sbJson);
CkJsonObject_Dispose(json);

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
          }
        ]
      }
    }
  ]
}