Delphi DLL

List Google Calendars

See more Google Calendar Examples

Demonstrates how to list the Google Calendars for an account. Delphi DLL

uses
    Winapi.Windows, Winapi.Messages, System.SysUtils, System.Variants, System.Classes, Vcl.Graphics,
    Vcl.Controls, Vcl.Forms, Vcl.Dialogs, Vcl.StdCtrls, JsonObject, Http;

...

procedure TForm1.Button1Click(Sender: TObject);
var
success: Boolean;
jsonToken: HCkJsonObject;
http: HCkHttp;
jsonResponse: PWideChar;
json: HCkJsonObject;
numCalendars: Integer;
i: Integer;
numSettings: Integer;
j: Integer;

begin
success := False;

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

// This example uses a previously obtained access token having permission for the 
// Google Calendar scope.

// In this example, Get Google Calendar OAuth2 Access Token, the access
// token was saved to a JSON file.  This example fetches the access token from the file..
jsonToken := CkJsonObject_Create();
success := CkJsonObject_LoadFile(jsonToken,'qa_data/tokens/googleCalendar.json');
if (CkJsonObject_HasMember(jsonToken,'access_token') = False) then
  begin
    Memo1.Lines.Add('No access token found.');
    Exit;
  end;
http := CkHttp_Create();
CkHttp_putAuthToken(http,CkJsonObject__stringOf(jsonToken,'access_token'));

jsonResponse := CkHttp__quickGetStr(http,'https://www.googleapis.com/calendar/v3/users/me/calendarList');
if (CkHttp_getLastMethodSuccess(http) <> True) then
  begin
    Memo1.Lines.Add(CkHttp__lastErrorText(http));
    Exit;
  end;

Memo1.Lines.Add(jsonResponse);
Memo1.Lines.Add('-----------------------------');

// This is a sample JSON response:
// (Sample code to iterate over the JSON response is shown below.)

// {
//  "kind": "calendar#calendarList",
//  "etag": "\"p32cfpufit76da0g\"",
//  "nextSyncToken": "CJj8-fLpzNUCEhhzdXBwb3J0QGNoaWxrYXRjbG91ZC5jb20=",
//  "items": [
//   {
//    "kind": "calendar#calendarListEntry",
//    "etag": "\"1465249947472000\"",
//    "id": "support@chilkatcloud.com",
//    "summary": "support@chilkatcloud.com",
//    "timeZone": "America/Chicago",
//    "colorId": "14",
//    "backgroundColor": "#9fe1e7",
//    "foregroundColor": "#000000",
//    "selected": true,
//    "accessRole": "owner",
//    "defaultReminders": [
//     {
//      "method": "popup",
//      "minutes": 10
//     }
//    ],
//    "notificationSettings": {
//     "notifications": [
//      {
//       "type": "eventCreation",
//       "method": "email"
//      },
//      {
//       "type": "eventChange",
//       "method": "email"
//      },
//      {
//       "type": "eventCancellation",
//       "method": "email"
//      },
//      {
//       "type": "eventResponse",
//       "method": "email"
//      }
//     ]
//    },
//    "primary": true
//   },
//   {
//    "kind": "calendar#calendarListEntry",
//    "etag": "\"1502373382732000\"",
//    "id": "#contacts@group.v.calendar.google.com",
//    "summary": "Contacts",
//    "timeZone": "America/Chicago",
//    "colorId": "13",
//    "backgroundColor": "#92e1c0",
//    "foregroundColor": "#000000",
//    "selected": true,
//    "accessRole": "reader",
//    "defaultReminders": []
//   },
//   {
//    "kind": "calendar#calendarListEntry",
//    "etag": "\"1502373376447000\"",
//    "id": "en.usa#holiday@group.v.calendar.google.com",
//    "summary": "Holidays in United States",
//    "timeZone": "America/Chicago",
//    "colorId": "8",
//    "backgroundColor": "#16a765",
//    "foregroundColor": "#000000",
//    "selected": true,
//    "accessRole": "reader",
//    "defaultReminders": []
//   }
//  ]
// }
// 

// Iterate over the JSON response..
json := CkJsonObject_Create();
CkJsonObject_Load(json,jsonResponse);

numCalendars := CkJsonObject_SizeOfArray(json,'items');
i := 0;
while i < numCalendars do
  begin
    Memo1.Lines.Add('--- ' + IntToStr(i) + ' ---');
    CkJsonObject_putI(json,i);
    Memo1.Lines.Add('kind: ' + CkJsonObject__stringOf(json,'items[i].kind'));
    Memo1.Lines.Add('id: ' + CkJsonObject__stringOf(json,'items[i].id'));

    // Examine the notification settings, if any..
    numSettings := CkJsonObject_SizeOfArray(json,'items[i].notificationSettings.notifications');
    if (numSettings > 0) then
      begin
        j := 0;
        while j < numSettings do
          begin
            CkJsonObject_putJ(json,j);
            Memo1.Lines.Add('Notification Type: ' + CkJsonObject__stringOf(json,'items[i].notificationSettings.notifications[j].type'));
            Memo1.Lines.Add('Notification Method: ' + CkJsonObject__stringOf(json,'items[i].notificationSettings.notifications[j].method'));
            j := j + 1;
          end;

      end;
    i := i + 1;
  end;

CkJsonObject_Dispose(jsonToken);
CkHttp_Dispose(http);
CkJsonObject_Dispose(json);

end;