B4X

Google Calendar Search Events (List Events with Optional Query Parameters)

See more Google Calendar Examples

Demonstrates how to specify optional query parameters for listing events. This example uses the "q" parameter to free-text search for events, and uses the "timeMin" parameter to specify a lower bound for an event's end time. 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")

'  We'll want to build a URL with the query params..
Dim sbUrl As ChilkatStringBuilder
sbUrl.Initialize
sbUrl.Append("https://www.googleapis.com/calendar/v3/calendars/{$calendarId}/events?")

'  Use the HTTP request object as a helper for creating the URL encoded query param list..
Dim req As ChilkatHttpRequest
req.Initialize

'  Find events with the word "pizza".
req.AddParam("q", "pizza")

'  Get events for the current date/time or later.
Dim dt As ChilkatDateTime
dt.Initialize
dt.SetFromCurrentSystemTime
req.AddParam("timeMin", dt.GetAsTimestamp(False))

'  Add these query params to the URL:
sbUrl.Append(req.GetUrlEncodedParams)

'  Examine the URL..
Log("URL: " & sbUrl.GetAsString)

'  The URL looks like this:
'  https://www.googleapis.com/calendar/v3/calendars/{$calendarId}/events?q=pizza&timeMin=2017-08-11T13%3A35%3A28Z

'  Let's get events in 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(sbUrl.GetAsString, 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


Log(sbResponse.GetAsString)

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

'  {
'   "kind": "calendar#events",
'   "etag": "\"p32cafkumkb7ta0g\"",
'   "summary": "support@chilkatcloud.com",
'   "updated": "2017-08-11T13:19:48.143Z",
'   "timeZone": "America/Chicago",
'   "accessRole": "owner",
'   "defaultReminders": [
'    {
'     "method": "popup",
'     "minutes": 10
'    }
'   ],
'   "nextSyncToken": "CJin09aiz9UCEJin09aiz9UCGAU=",
'   "items": [
'    {
'     "kind": "calendar#event",
'     "etag": "\"3004915160212000\"",
'     "id": "02pv1cpdp7vm11htnfi3ii7iie",
'     "status": "confirmed",
'     "htmlLink": "https://www.google.com/calendar/event?eid=MDJwdjFjcGRwN3ZtMTFodG5maTNpaTdpaWUgc3VwcG9ydEBjaGlsa2F0Y2xvdWQuY29t",
'     "created": "2017-08-11T13:19:40.000Z",
'     "updated": "2017-08-11T13:19:40.106Z",
'     "summary": "Eat Lou Malnati's Pizza",
'     "creator": {
'      "email": "support@chilkatcloud.com",
'      "self": true
'     },
'     "organizer": {
'      "email": "support@chilkatcloud.com",
'      "self": true
'     },
'     "start": {
'      "dateTime": "2017-08-12T12:00:00-05:00"
'     },
'     "end": {
'      "dateTime": "2017-08-12T13:00:00-05:00"
'     },
'     "iCalUID": "02pv1cpdp7vm11htnfi3ii7iie@google.com",
'     "sequence": 0,
'     "hangoutLink": "https://plus.google.com/hangouts/_/chilkatcloud.com/support?hceid=c3VwcG9ydEBjaGlsa2F0Y2xvdWQuY29t.02pv1cpdp7vm11htnfi3ii7iie",
'     "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:

'  Eat Lou Malnati's Pizza
'  2017-08-12T12:00:00-05:00
'  2017-08-12T13:00:00-05:00
'  --