Lua

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. Lua

local chilkat = require("chilkat")

-- 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..
local jsonToken = chilkat.JsonObject.new()
local success = jsonToken:load_file("qa_data/tokens/googleCalendar.json")
if not jsonToken:has_member("access_token") then
    print("No access token found.")
    return
end

local http = chilkat.Http.new()
http.auth_token = jsonToken:string_of("access_token")

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

-- Find events with the word "pizza".
req:add_param("q", "pizza")

-- Get events for the current date/time or later.
local dt = chilkat.DateTime.new()
dt:set_from_current_system_time()
req:add_param("timeMin", dt:get_as_timestamp(false))

-- Add these query params to the URL:
sbUrl:append(req:get_url_encoded_params())

-- Examine the URL..
print("URL: " .. sbUrl:get_as_string())

-- 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:set_url_var("calendarId", "primary")
local sbResponse = chilkat.StringBuilder.new()
success = http:quick_get_sb(sbUrl:get_as_string(), sbResponse)
if not success then
    print(http.last_error_text)
    return
end

if http.last_status ~= 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.
    print("Error response status: " .. http.last_status)
    print(sbResponse:get_as_string())
    return
end

print(sbResponse:get_as_string())

-- 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
--    }
--   }
--  ]
-- }
--
--

local json = chilkat.JsonObject.new()
json:load_sb(sbResponse)

local numEvents = json:size_of_array("items")
local i = 0
while i < numEvents do
    json.i = i
    print(json:string_of("items[i].summary"))
    print(json:string_of("items[i].start.dateTime"))
    print(json:string_of("items[i].end.dateTime"))
    print("--")
    i = i + 1
end

-- Sample output:

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