insert.php

<?php
session_start();
if ((!isset($_SESSION['logged-in']))){
  echo "<script>location.replace(\"login.html\");</script>";
}
error_reporting(E_ERROR | E_PARSE);

require_once './google-api/src/Google_Client.php';
require_once './google-api/src/contrib/Google_CalendarService.php';

// Set your client id, service account name, and the path to your private key.
// For more information about obtaining these keys, visit:
// https://developers.google.com/console/help/#service_accounts
const CLIENT_ID = '1008297730734-8r5dchmunmk0sejh4k0l39paih4dk5uj.apps.googleusercontent.com';
const SERVICE_ACCOUNT_NAME = '1008297730734-8r5dchmunmk0sejh4k0l39paih4dk5uj@developer.gserviceaccount.com';

// Make sure you keep your key.p12 file in a secure location, and isn't
// readable by others.
const KEY_FILE = '9a4635f8858236680fc947a7c4bcbbb426fdfa3d-privatekey.p12';

const CAL_ID = 'od31imc8pbfs6n9mhiros5ff30@group.calendar.google.com';

$client = new Google_Client();
$client->setApplicationName("UCMom");

// Set your cached access token. Remember to replace $_SESSION with a
// real database or memcached.
//session_start();
if (isset($_SESSION['token'])) {
 $client->setAccessToken($_SESSION['token']);
}

// Load the key in PKCS 12 format (you need to download this from the
// Google API Console when the service account was created.
$key = file_get_contents(KEY_FILE);
$client->setAssertionCredentials(new Google_AssertionCredentials(
    SERVICE_ACCOUNT_NAME,
    array('https://www.googleapis.com/auth/calendar'),
    $key)
);

$client->setClientId(CLIENT_ID);
//$service = new Google_CalendarService($client);

$client->setAssertionCredentials(new Google_AssertionCredentials(
  SERVICE_ACCOUNT_NAME,
  'https://www.google.com/calendar/feeds/' . CAL_ID . '/private/full/',
  $key)
);
$dup = False;
$count = 0;
$input_time = $_POST["input_time"];
$location = $_POST["input_location"];
$date = $_POST["input_date"];

$time = $input_time . ":00-08:00";
$s_datetime = $date . "T" . $time;
$e_format = date('H:i:s', strtotime($input_time) + (29*60));
$e_datetime = $date . "T" . $e_format . "-08:00";
$username = "May";
//TODO: parse username
$client->setUseObjects(true); 
$cal = new Google_CalendarService($client);
$event = new Google_Event();
$event->setSummary($username);
$event->setLocation($location);
$start = new Google_EventDateTime();
$start->setDateTime($s_datetime);
$event->setStart($start);
$end = new Google_EventDateTime();
$end->setDateTime($e_datetime);
$event->setEnd($end);
$params = array('timeMin' => $checkstart);
$eventlist = $cal->events->listEvents(CAL_ID, $params);
foreach ($eventlist->getItems() as $cevent){
	if ($event->getStart()->getDateTime() == $cevent->getStart()->getDateTime()){
		echo "<script>alert('This slot has already been reserved!');</script>";
		$dup = True;
	}
	if ($event->getSummary() == $username){
		$count += 1;
	}
}
if ($count > 4){
	$dup = True;
	echo "<script>alert('You have reached a max of 4 reservations');</script>";
}

if(!$dup){
	$createdEvent = $cal->events->insert(CAL_ID, $event);
}

if ($client->getAccessToken()) {
  $_SESSION['token'] = $client->getAccessToken();
}

echo "<script>location.replace(\"index.html\");</script>";

?>