Lua

List Events on a Specified Google Calendar

See more Google Calendar Examples

Demonstrates how to fetch the list of events on a particular Google Calendar. The calendar can be referenced by the calendar ID, or by the keyword "primary". 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")

-- Let's get 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("https://www.googleapis.com/calendar/v3/calendars/{$calendarId}/events", 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

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

-- {
--  "kind": "calendar#events",
--  "etag": "\"p32cfpufit76da0g\"",
--  "summary": "support@chilkatcloud.com",
--  "updated": "2017-08-10T14:00:27.199Z",
--  "timeZone": "America/Chicago",
--  "accessRole": "owner",
--  "defaultReminders": [
--   {
--    "method": "popup",
--    "minutes": 10
--   }
--  ],
--  "nextSyncToken": "CJj8-fLpzNUCEJj8-fLpzNUCGAU=",
--  "items": [
--   {
--    "kind": "calendar#event",
--    "etag": "\"3004746854620000\"",
--    "id": "5jt9fopfg3rr9eftegiuq7gc5k",
--    "status": "confirmed",
--    "htmlLink": "https://www.google.com/calendar/event?eid=NWp0OWZvcGZnM3JyOWVmdGVnaXVxN2djNWsgc3VwcG9ydEBjaGlsa2F0Y2xvdWQuY29t",
--    "created": "2017-08-10T13:57:07.000Z",
--    "updated": "2017-08-10T13:57:07.310Z",
--    "summary": "Run 10 miles",
--    "creator": {
--     "email": "support@chilkatcloud.com",
--     "self": true
--    },
--    "organizer": {
--     "email": "support@chilkatcloud.com",
--     "self": true
--    },
--    "start": {
--     "dateTime": "2017-08-10T12:00:00-05:00"
--    },
--    "end": {
--     "dateTime": "2017-08-10T13:00:00-05:00"
--    },
--    "iCalUID": "5jt9fopfg3rr9eftegiuq7gc5k@google.com",
--    "sequence": 0,
--    "hangoutLink": "https://plus.google.com/hangouts/_/chilkatcloud.com/support?hceid=c3VwcG9ydEBjaGlsa2F0Y2xvdWQuY29t.5jt9fopfg3rr9eftegiuq7gc5k",
--    "reminders": {
--     "useDefault": true
--    }
--   },
--   {
--    "kind": "calendar#event",
--    "etag": "\"3004746898118000\"",
--    "id": "7dvh49vd219r3sq7jdueieu8rc",
--    "status": "confirmed",
--    "htmlLink": "https://www.google.com/calendar/event?eid=N2R2aDQ5dmQyMTlyM3NxN2pkdWVpZXU4cmMgc3VwcG9ydEBjaGlsa2F0Y2xvdWQuY29t",
--    "created": "2017-08-10T13:57:29.000Z",
--    "updated": "2017-08-10T13:57:29.059Z",
--    "summary": "Eat Giordano's Pizza",
--    "creator": {
--     "email": "support@chilkatcloud.com",
--     "self": true
--    },
--    "organizer": {
--     "email": "support@chilkatcloud.com",
--     "self": true
--    },
--    "start": {
--     "dateTime": "2017-08-10T15:00:00-05:00"
--    },
--    "end": {
--     "dateTime": "2017-08-10T16:00:00-05:00"
--    },
--    "iCalUID": "7dvh49vd219r3sq7jdueieu8rc@google.com",
--    "sequence": 0,
--    "hangoutLink": "https://plus.google.com/hangouts/_/chilkatcloud.com/support?hceid=c3VwcG9ydEBjaGlsa2F0Y2xvdWQuY29t.7dvh49vd219r3sq7jdueieu8rc",
--    "reminders": {
--     "useDefault": true
--    }
--   },
--   {
--    "kind": "calendar#event",
--    "etag": "\"3004746915224000\"",
--    "id": "5btd89ljn07bg3tlgpimcaqrro",
--    "status": "confirmed",
--    "htmlLink": "https://www.google.com/calendar/event?eid=NWJ0ZDg5bGpuMDdiZzN0bGdwaW1jYXFycm8gc3VwcG9ydEBjaGlsa2F0Y2xvdWQuY29t",
--    "created": "2017-08-10T13:57:37.000Z",
--    "updated": "2017-08-10T13:57:37.612Z",
--    "summary": "Nap",
--    "creator": {
--     "email": "support@chilkatcloud.com",
--     "self": true
--    },
--    "organizer": {
--     "email": "support@chilkatcloud.com",
--     "self": true
--    },
--    "start": {
--     "dateTime": "2017-08-10T16:30:00-05:00"
--    },
--    "end": {
--     "dateTime": "2017-08-10T17:30:00-05:00"
--    },
--    "iCalUID": "5btd89ljn07bg3tlgpimcaqrro@google.com",
--    "sequence": 0,
--    "hangoutLink": "https://plus.google.com/hangouts/_/chilkatcloud.com/support?hceid=c3VwcG9ydEBjaGlsa2F0Y2xvdWQuY29t.5btd89ljn07bg3tlgpimcaqrro",
--    "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:

-- Run 10 miles
-- 2017-08-10T12:00:00-05:00
-- 2017-08-10T13:00:00-05:00
-- --
-- Eat Giordano's Pizza
-- 2017-08-10T15:00:00-05:00
-- 2017-08-10T16:00:00-05:00
-- --
-- Nap
-- 2017-08-10T16:30:00-05:00
-- 2017-08-10T17:30:00-05:00
-- --
--