Get-OnHolidayToday.php

<?php
# Taken almost entirely from:
# https://developers.google.com/calendar/quickstart/php

#CHANGE THIS STRING FOR WHAT YOUR CALENDAR HAS BOOKED
$checkstring = "BOOKED OFF";
$statusfile  = "token.holidaystatus";

// [START calendar_quickstart]
require __DIR__ . '/vendor/autoload.php';
if (php_sapi_name() != 'cli') {
    throw new Exception('This application must be run on the command line.');
}
/**
 * Returns an authorized API client.
 * @return Google_Client the authorized client object
 */
function getClient()
{
    $client = new Google_Client();
    $client->setApplicationName('Google Calendar API PHP Quickstart');
    $client->setScopes(Google_Service_Calendar::CALENDAR_READONLY);
    $client->setAuthConfig('credentials.json');
    $client->setAccessType('offline');
    $client->setPrompt('select_account consent');
    // Load previously authorized token from a file, if it exists.
    // The file token.json stores the user's access and refresh tokens, and is
    // created automatically when the authorization flow completes for the first
    // time.
    $tokenPath = 'token.json';
    if (file_exists($tokenPath)) {
        $accessToken = json_decode(file_get_contents($tokenPath), true);
        $client->setAccessToken($accessToken);
    }
    // If there is no previous token or it's expired.
    if ($client->isAccessTokenExpired()) {
        // Refresh the token if possible, else fetch a new one.
        if ($client->getRefreshToken()) {
            $client->fetchAccessTokenWithRefreshToken($client->getRefreshToken());
        } else {
            // Request authorization from the user.
            $authUrl = $client->createAuthUrl();
            printf("Open the following link in your browser:\n%s\n", $authUrl);
            print 'Enter verification code: ';
            $authCode = trim(fgets(STDIN));
            // Exchange authorization code for an access token.
            $accessToken = $client->fetchAccessTokenWithAuthCode($authCode);
            $client->setAccessToken($accessToken);
            // Check to see if there was an error.
            if (array_key_exists('error', $accessToken)) {
                throw new Exception(join(', ', $accessToken));
            }
        }
        // Save the token to a file.
        if (!file_exists(dirname($tokenPath))) {
            mkdir(dirname($tokenPath), 0700, true);
        }
        file_put_contents($tokenPath, json_encode($client->getAccessToken()));
    }
    return $client;
}
// Get the API client and construct the service object.
$client = getClient();
$service = new Google_Service_Calendar($client);


// Print the next 10 events on the user's calendar.
$calendarId = 'primary';
$optParams = array(
  'maxResults' => 10,
  'orderBy' => 'startTime',
  'singleEvents' => true,
  'timeMin' => date('c'),
);
$results = $service->events->listEvents($calendarId, $optParams);
$events = $results->getItems();
if (empty($events)) {
    print "ERROR1";
} else {
    foreach ($events as $event) {
        $start = $event->start->dateTime;
        if (empty($start)) {
            $start = $event->start->date;
        }
        $desc = $event->getSummary();
        $todayYMD = date("Y-m-d");
        if (strlen($start) == 20) {
            $caldate = substr($start, 0, -10);
        } else {
            $caldate = $start;
        }
        if (($desc == $checkstring) && ($caldate == $todayYMD)) {
            $status = "True";
            $myfile = fopen($statusfile, "w") or die("ERROR2");
            fwrite($myfile, $status);
            exit;
        } else {
            $status = "False";
            $myfile = fopen($statusfile, "w") or die("ERROR3");
            fwrite($myfile, $status);
            exit;
        };
    }
}
// [END calendar_quickstart]