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(Go) 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.

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    // 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 := chilkat.NewJsonObject()
    success := jsonToken.LoadFile("qa_data/tokens/googleCalendar.json")
    if jsonToken.HasMember("access_token") == false {
        fmt.Println("No access token found.")
        return
    }

    http := chilkat.NewHttp()
    http.SetAuthToken(jsonToken.StringOf("access_token"))

    // We'll want to build a URL with the query params..
    sbUrl := chilkat.NewStringBuilder()
    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..
    req := chilkat.NewHttpRequest()

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

    // Get events for the current date/time or later.
    dt := chilkat.NewCkDateTime()
    dt.SetFromCurrentSystemTime()
    req.AddParam("timeMin",*dt.GetAsTimestamp(false))

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

    // Examine the URL..
    fmt.Println("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")
    sbResponse := chilkat.NewStringBuilder()
    success = http.QuickGetSb(*sbUrl.GetAsString(),sbResponse)
    if success != true {
        fmt.Println(http.LastErrorText())
        return
    }

    if http.LastStatus() != 200 {
        // Note: If a 401 unauthorized response is received, it likely means that the OAuth2 access token needs
        // to be refreshed or re-fetched.
        fmt.Println("Error response status: ", http.LastStatus())
        fmt.Println(*sbResponse.GetAsString())
        return
    }

    fmt.Println(*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
    //    }
    //   }
    //  ]
    // }
    // 
    // 

    json := chilkat.NewJsonObject()
    json.LoadSb(sbResponse)

    numEvents := json.SizeOfArray("items")
    i := 0
    for i < numEvents {
        json.SetI(i)
        fmt.Println(*json.StringOf("items[i].summary"))
        fmt.Println(*json.StringOf("items[i].start.dateTime"))
        fmt.Println(*json.StringOf("items[i].end.dateTime"))
        fmt.Println("--")
        i = i + 1
    }

    // Sample output:

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

 

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