Java

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. Chilkat2 Java

import com.chilkatsoft.chilkat2.ChilkatException;
import com.chilkatsoft.chilkat2.DateTime;
import com.chilkatsoft.chilkat2.Http;
import com.chilkatsoft.chilkat2.HttpRequest;
import com.chilkatsoft.chilkat2.JsonObject;
import com.chilkatsoft.chilkat2.StringBuilder;

public class ChilkatExample {

    public static void main(String[] args) {
        // 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..
        JsonObject jsonToken = new JsonObject();
        jsonToken.loadFile("qa_data/tokens/googleCalendar.json");
        if (!jsonToken.hasMember("access_token")) {
            System.out.println("No access token found.");
            return;
        }

        Http http = new Http();
        http.setAuthToken(jsonToken.stringOf("access_token"));

        // We'll want to build a URL with the query params..
        StringBuilder sbUrl = new StringBuilder();
        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..
        HttpRequest req = new HttpRequest();

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

        // Get events for the current date/time or later.
        DateTime dt = new DateTime();
        dt.setFromCurrentSystemTime();
        req.addParam("timeMin", dt.getAsTimestamp(false));

        // Add these query params to the URL:
        sbUrl.append(req.getUrlEncodedParams());

        // Examine the URL..
        System.out.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");
        StringBuilder sbResponse = new StringBuilder();
        try {
            http.quickGetSb(sbUrl.getAsString(), sbResponse);
        } catch (ChilkatException e) {
            System.out.println(e.getLastErrorText());
            return;
        }

        if (http.getLastStatus() != 200) {
            // Note: If a 401 unauthorized response is received, it likely means that the OAuth2 access token needs
            // to be refreshed or re-fetched.
            System.out.println("Error response status: " + http.getLastStatus());
            System.out.println(sbResponse.getAsString());
            return;
        }

        System.out.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
        //    }
        //   }
        //  ]
        // }
        //
        //

        JsonObject json = new JsonObject();
        json.loadSb(sbResponse);

        int numEvents = json.sizeOfArray("items");
        int i = 0;
        while (i < numEvents) {
            json.setI(i);
            System.out.println(json.stringOf("items[i].summary"));
            System.out.println(json.stringOf("items[i].start.dateTime"));
            System.out.println(json.stringOf("items[i].end.dateTime"));
            System.out.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
        // --
    }
}