B4X

List Events on a Specified Google Calendar

See more Google Calendar Examples

Demonstrates how to fetch the list of events on a particular Google Calendar. The calendar can be referenced by the calendar ID, or by the keyword "primary". B4X

Dim success As Boolean = 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..
Dim jsonToken As ChilkatJsonObject
jsonToken.Initialize
success = jsonToken.LoadFile("qa_data/tokens/googleCalendar.json")
If jsonToken.HasMember("access_token") = False Then
    Log("No access token found.")
    Return
End If

Dim http As ChilkatHttp
http.Initialize("http")
http.AuthToken = jsonToken.StringOf("access_token")

'  Let's get the primary calendar.  A calendar ID could have be used instead of "primary".
http.SetUrlVar("calendarId", "primary")
Dim sbResponse As ChilkatStringBuilder
sbResponse.Initialize
success = http.QuickGetSb("https://www.googleapis.com/calendar/v3/calendars/{$calendarId}/events", sbResponse)
If success <> True Then
    Log(http.LastErrorText)
    Return
End If


If http.LastStatus <> 200 Then
    '  Note: If a 401 unauthorized response is received, it likely means that the OAuth2 access token needs
    '  to be refreshed or re-fetched.
    Log("Error response status: " & http.LastStatus)
    Log(sbResponse.GetAsString)
    Return
End If


'  A sample JSON response:
'  (Code for parsing the Google Calendar events is shown below.)

'  {
'   "kind": "calendar#events",
'   "etag": "\"p32cfpufit76da0g\"",
'   "summary": "support@chilkatcloud.com",
'   "updated": "2017-08-10T14:00:27.199Z",
'   "timeZone": "America/Chicago",
'   "accessRole": "owner",
'   "defaultReminders": [
'    {
'     "method": "popup",
'     "minutes": 10
'    }
'   ],
'   "nextSyncToken": "CJj8-fLpzNUCEJj8-fLpzNUCGAU=",
'   "items": [
'    {
'     "kind": "calendar#event",
'     "etag": "\"3004746854620000\"",
'     "id": "5jt9fopfg3rr9eftegiuq7gc5k",
'     "status": "confirmed",
'     "htmlLink": "https://www.google.com/calendar/event?eid=NWp0OWZvcGZnM3JyOWVmdGVnaXVxN2djNWsgc3VwcG9ydEBjaGlsa2F0Y2xvdWQuY29t",
'     "created": "2017-08-10T13:57:07.000Z",
'     "updated": "2017-08-10T13:57:07.310Z",
'     "summary": "Run 10 miles",
'     "creator": {
'      "email": "support@chilkatcloud.com",
'      "self": true
'     },
'     "organizer": {
'      "email": "support@chilkatcloud.com",
'      "self": true
'     },
'     "start": {
'      "dateTime": "2017-08-10T12:00:00-05:00"
'     },
'     "end": {
'      "dateTime": "2017-08-10T13:00:00-05:00"
'     },
'     "iCalUID": "5jt9fopfg3rr9eftegiuq7gc5k@google.com",
'     "sequence": 0,
'     "hangoutLink": "https://plus.google.com/hangouts/_/chilkatcloud.com/support?hceid=c3VwcG9ydEBjaGlsa2F0Y2xvdWQuY29t.5jt9fopfg3rr9eftegiuq7gc5k",
'     "reminders": {
'      "useDefault": true
'     }
'    },
'    {
'     "kind": "calendar#event",
'     "etag": "\"3004746898118000\"",
'     "id": "7dvh49vd219r3sq7jdueieu8rc",
'     "status": "confirmed",
'     "htmlLink": "https://www.google.com/calendar/event?eid=N2R2aDQ5dmQyMTlyM3NxN2pkdWVpZXU4cmMgc3VwcG9ydEBjaGlsa2F0Y2xvdWQuY29t",
'     "created": "2017-08-10T13:57:29.000Z",
'     "updated": "2017-08-10T13:57:29.059Z",
'     "summary": "Eat Giordano's Pizza",
'     "creator": {
'      "email": "support@chilkatcloud.com",
'      "self": true
'     },
'     "organizer": {
'      "email": "support@chilkatcloud.com",
'      "self": true
'     },
'     "start": {
'      "dateTime": "2017-08-10T15:00:00-05:00"
'     },
'     "end": {
'      "dateTime": "2017-08-10T16:00:00-05:00"
'     },
'     "iCalUID": "7dvh49vd219r3sq7jdueieu8rc@google.com",
'     "sequence": 0,
'     "hangoutLink": "https://plus.google.com/hangouts/_/chilkatcloud.com/support?hceid=c3VwcG9ydEBjaGlsa2F0Y2xvdWQuY29t.7dvh49vd219r3sq7jdueieu8rc",
'     "reminders": {
'      "useDefault": true
'     }
'    },
'    {
'     "kind": "calendar#event",
'     "etag": "\"3004746915224000\"",
'     "id": "5btd89ljn07bg3tlgpimcaqrro",
'     "status": "confirmed",
'     "htmlLink": "https://www.google.com/calendar/event?eid=NWJ0ZDg5bGpuMDdiZzN0bGdwaW1jYXFycm8gc3VwcG9ydEBjaGlsa2F0Y2xvdWQuY29t",
'     "created": "2017-08-10T13:57:37.000Z",
'     "updated": "2017-08-10T13:57:37.612Z",
'     "summary": "Nap",
'     "creator": {
'      "email": "support@chilkatcloud.com",
'      "self": true
'     },
'     "organizer": {
'      "email": "support@chilkatcloud.com",
'      "self": true
'     },
'     "start": {
'      "dateTime": "2017-08-10T16:30:00-05:00"
'     },
'     "end": {
'      "dateTime": "2017-08-10T17:30:00-05:00"
'     },
'     "iCalUID": "5btd89ljn07bg3tlgpimcaqrro@google.com",
'     "sequence": 0,
'     "hangoutLink": "https://plus.google.com/hangouts/_/chilkatcloud.com/support?hceid=c3VwcG9ydEBjaGlsa2F0Y2xvdWQuY29t.5btd89ljn07bg3tlgpimcaqrro",
'     "reminders": {
'      "useDefault": true
'     }
'    }
'   ]
'  }
'  

Dim json As ChilkatJsonObject
json.Initialize
json.LoadSb(sbResponse)

Dim numEvents As Int = json.SizeOfArray("items")
Dim i As Int = 0
Do While i < numEvents
    json.I = i
    Log(json.StringOf("items[i].summary"))
    Log(json.StringOf("items[i].start.dateTime"))
    Log(json.StringOf("items[i].end.dateTime"))
    Log("--")
    i = i + 1
Loop

'  Sample output:

'  Run 10 miles
'  2017-08-10T12:00:00-05:00
'  2017-08-10T13:00:00-05:00
'  --
'  Eat Giordano's Pizza
'  2017-08-10T15:00:00-05:00
'  2017-08-10T16:00:00-05:00
'  --
'  Nap
'  2017-08-10T16:30:00-05:00
'  2017-08-10T17:30:00-05:00
'  --
'