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

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.

Chilkat ActiveX Downloads

ActiveX for 32-bit and 64-bit Windows

integer li_rc
oleobject loo_JsonToken
integer li_Success
oleobject loo_Http
oleobject loo_SbUrl
oleobject loo_Req
oleobject loo_Dt
oleobject loo_SbResponse
oleobject loo_Json
integer li_NumEvents
integer i

//  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..
loo_JsonToken = create oleobject
li_rc = loo_JsonToken.ConnectToNewObject("Chilkat_9_5_0.JsonObject")
if li_rc < 0 then
    destroy loo_JsonToken
    MessageBox("Error","Connecting to COM object failed")
    return
end if
li_Success = loo_JsonToken.LoadFile("qa_data/tokens/googleCalendar.json")
if loo_JsonToken.HasMember("access_token") = 0 then
    Write-Debug "No access token found."
    destroy loo_JsonToken
    return
end if

loo_Http = create oleobject
li_rc = loo_Http.ConnectToNewObject("Chilkat_9_5_0.Http")

loo_Http.AuthToken = loo_JsonToken.StringOf("access_token")

//  We'll want to build a URL with the query params..
loo_SbUrl = create oleobject
li_rc = loo_SbUrl.ConnectToNewObject("Chilkat_9_5_0.StringBuilder")

loo_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..
loo_Req = create oleobject
li_rc = loo_Req.ConnectToNewObject("Chilkat_9_5_0.HttpRequest")

//  Find events with the word "pizza".
loo_Req.AddParam("q","pizza")

//  Get events for the current date/time or later.
loo_Dt = create oleobject
li_rc = loo_Dt.ConnectToNewObject("Chilkat_9_5_0.CkDateTime")

loo_Dt.SetFromCurrentSystemTime()
loo_Req.AddParam("timeMin",loo_Dt.GetAsTimestamp(0))

//  Add these query params to the URL:
loo_SbUrl.Append(loo_Req.GetUrlEncodedParams())

//  Examine the URL..
Write-Debug "URL: " + loo_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".
loo_Http.SetUrlVar("calendarId","primary")
loo_SbResponse = create oleobject
li_rc = loo_SbResponse.ConnectToNewObject("Chilkat_9_5_0.StringBuilder")

li_Success = loo_Http.QuickGetSb(loo_SbUrl.GetAsString(),loo_SbResponse)
if li_Success <> 1 then
    Write-Debug loo_Http.LastErrorText
    destroy loo_JsonToken
    destroy loo_Http
    destroy loo_SbUrl
    destroy loo_Req
    destroy loo_Dt
    destroy loo_SbResponse
    return
end if

if loo_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.
    Write-Debug "Error response status: " + string(loo_Http.LastStatus)
    Write-Debug loo_SbResponse.GetAsString()
    destroy loo_JsonToken
    destroy loo_Http
    destroy loo_SbUrl
    destroy loo_Req
    destroy loo_Dt
    destroy loo_SbResponse
    return
end if

Write-Debug loo_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
//     }
//    }
//   ]
//  }
// 
// 

loo_Json = create oleobject
li_rc = loo_Json.ConnectToNewObject("Chilkat_9_5_0.JsonObject")

loo_Json.LoadSb(loo_SbResponse)

li_NumEvents = loo_Json.SizeOfArray("items")
i = 0
do while i < li_NumEvents
    loo_Json.I = i
    Write-Debug loo_Json.StringOf("items[i].summary")
    Write-Debug loo_Json.StringOf("items[i].start.dateTime")
    Write-Debug loo_Json.StringOf("items[i].end.dateTime")
    Write-Debug "--"
    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
//  --


destroy loo_JsonToken
destroy loo_Http
destroy loo_SbUrl
destroy loo_Req
destroy loo_Dt
destroy loo_SbResponse
destroy loo_Json

 

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