iflrandevu/application/libraries/Google_sync.php

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<?php defined('BASEPATH') or exit('No direct script access allowed');
/* ----------------------------------------------------------------------------
* Easy!Appointments - Open Source Web Scheduler
*
* @package EasyAppointments
* @author A.Tselegidis <alextselegidis@gmail.com>
* @copyright Copyright (c) 2013 - 2020, Alex Tselegidis
* @license http://opensource.org/licenses/GPL-3.0 - GPLv3
* @link http://easyappointments.org
* @since v1.0.0
* ---------------------------------------------------------------------------- */
/**
* Google Synchronization Class
*
* This class implements all the core synchronization between the Google Calendar
* and the Easy!Appointments system. Do not place any model handling inside this
* library.
*
* @package Libraries
*/
class Google_Sync {
/**
* CodeIgniter Instance
*
* @var CI_Controller
*/
protected $framework;
/**
* Google API Client
*
* @var Google_Client
*/
protected $client;
/**
* Google Calendar Service
*
* @var Google_Service_Calendar
*/
protected $service;
/**
* Class Constructor
*
* This method initializes the Google client class and the Calendar service
* class so that they can be used by the other methods.
*/
public function __construct()
{
$this->framework =& get_instance();
$this->framework->load->library('session');
// Initialize google client and calendar service.
$this->client = new Google_Client();
$this->client->setApplicationName($this->framework->config->item('google_application_name'));
$this->client->setClientId($this->framework->config->item('google_client_id'));
$this->client->setClientSecret($this->framework->config->item('google_client_secret'));
$this->client->setDeveloperKey($this->framework->config->item('google_api_key'));
$this->client->setRedirectUri(site_url('google/oauth_callback'));
$this->client->setAccessType('offline');
$this->client->addScope([
Google_Service_Calendar::CALENDAR,
Google_Service_Calendar::CALENDAR_READONLY
]);
$this->service = new Google_Service_Calendar($this->client);
}
/**
* Get Google OAuth authorization url.
*
* This url must be used to redirect the user to the Google user consent page,
* where the user grants access to his data for the Easy!Appointments app.
*/
public function get_auth_url()
{
// "max_auth_age" is needed because the user needs to always log in
// and not use an existing session.
return $this->client->createAuthUrl() . '&max_auth_age=0';
}
/**
* Authenticate the Google API usage.
*
* When the user grants consent for his data usage, google is going to redirect
* the browser back to the given redirect url. There a authentication code is
* provided. Using this code, we can authenticate the API usage and store the
* token information to the database.
*
* @param $code
*
* @return array
*
* @throws Exception
*/
public function authenticate($code)
{
$response = $this->client->fetchAccessTokenWithAuthCode($code);
if (isset($response['error']))
{
throw new Exception('Google Authentication Error (' . $response['error'] . '): ' . $response['error_description']);
}
return $response;
}
/**
* Refresh the Google Client access token.
*
* This method must be executed every time we need to make actions on a
* provider's Google Calendar account. A new token is necessary and the
* only way to get it is to use the stored refresh token that was provided
* when the provider granted consent to Easy!Appointments for use his
* Google Calendar account.
*
* @param string $refresh_token The provider's refresh token. This value is
* stored in the database and used every time we need to make actions to his
* Google Caledar account.
*/
public function refresh_token($refresh_token)
{
$this->client->refreshToken($refresh_token);
}
/**
* Add an appointment record to its providers Google Calendar account.
*
* This method checks whether the appointment's provider has enabled the Google Sync utility of Easy!Appointments
* and the stored access token is still valid. If yes, the selected appointment record is going to be added to the
* Google Calendar account.
*
* @param array $appointment Contains the appointment record data.
* @param array $provider Contains the provider record data.
* @param array $service Contains the service record data.
* @param array $customer Contains the customer recod data.
* @param array $settings Contains some company settings that are used by this method.
*
* @return Google_Service_Calendar_Event Returns the Google_Event class object.
*/
public function add_appointment($appointment, $provider, $service, $customer, $settings)
{
$this->framework->load->helper('general');
$event = new Google_Service_Calendar_Event();
$event->setSummary(($service != NULL) ? $service['name'] : 'Unavailable');
$event->setDescription($appointment['notes']);
$event->setLocation(isset($appointment['location']) ? $appointment['location'] : $settings['company_name']);
$start = new Google_Service_Calendar_EventDateTime();
$start->setDateTime(date3339(strtotime($appointment['start_datetime'])));
$event->setStart($start);
$end = new Google_Service_Calendar_EventDateTime();
$end->setDateTime(date3339(strtotime($appointment['end_datetime'])));
$event->setEnd($end);
$event->attendees = [];
$event_provider = new Google_Service_Calendar_EventAttendee();
$event_provider->setDisplayName($provider['first_name'] . ' '
. $provider['last_name']);
$event_provider->setEmail($provider['email']);
$event->attendees[] = $event_provider;
if ($customer != NULL)
{
$event_customer = new Google_Service_Calendar_EventAttendee();
$event_customer->setDisplayName($customer['first_name'] . ' '
. $customer['last_name']);
$event_customer->setEmail($customer['email']);
$event->attendees[] = $event_customer;
}
// Add the new event to the google calendar.
$created_event = $this->service->events->insert($provider['settings']['google_calendar'], $event);
return $created_event;
}
/**
* Update an existing appointment that is already synced with Google Calendar.
*
* This method updates the google calendar event item that is connected with the
* provided appointment record of Easy!Appointments.
*
* @param array $appointment Contains the appointment record data.
* @param array $provider Contains the provider record data.
* @param array $service Contains the service record data.
* @param array $customer Contains the customer recod data.
* @parma array $settings Contains some company settings that are used by this method.
*
* @return Google_Service_Calendar_Event Returns the Google_Service_Calendar_Event class object.
*/
public function update_appointment($appointment, $provider, $service, $customer, $settings)
{
$this->framework->load->helper('general');
$event = $this->service->events->get($provider['settings']['google_calendar'],
$appointment['id_google_calendar']);
$event->setSummary($service['name']);
$event->setDescription($appointment['notes']);
$event->setLocation(isset($appointment['location']) ? $appointment['location'] : $settings['company_name']);
$start = new Google_Service_Calendar_EventDateTime();
$start->setDateTime(date3339(strtotime($appointment['start_datetime'])));
$event->setStart($start);
$end = new Google_Service_Calendar_EventDateTime();
$end->setDateTime(date3339(strtotime($appointment['end_datetime'])));
$event->setEnd($end);
$event->attendees = [];
$event_provider = new Google_Service_Calendar_EventAttendee();
$event_provider->setDisplayName($provider['first_name'] . ' '
. $provider['last_name']);
$event_provider->setEmail($provider['email']);
$event->attendees[] = $event_provider;
if ($customer != NULL)
{
$event_customer = new Google_Service_Calendar_EventAttendee();
$event_customer->setDisplayName($customer['first_name'] . ' '
. $customer['last_name']);
$event_customer->setEmail($customer['email']);
$event->attendees[] = $event_customer;
}
$updated_event = $this->service->events->update($provider['settings']['google_calendar'],
$event->getId(), $event);
return $updated_event;
}
/**
* Delete an existing appointment from Google Calendar.
*
* @param array $provider Contains the provider record data.
* @param string $google_event_id The Google Calendar event id to
* be deleted.
*/
public function delete_appointment($provider, $google_event_id)
{
try
{
$this->service->events->delete($provider['settings']['google_calendar'], $google_event_id);
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}
catch (Exception $ex)
{
// Event was not found on Google Calendar.
}
}
/**
* Add unavailable period event to Google Calendar.
*
* @param array $provider Contains the provider record data.
* @param array $unavailable Contains unavailable period's data.
*
* @return Google_Service_Calendar_Event Returns the google event's object.
*/
public function add_unavailable($provider, $unavailable)
{
$this->framework->load->helper('general');
$event = new Google_Service_Calendar_Event();
$event->setSummary('Unavailable');
$event->setDescription($unavailable['notes']);
$start = new Google_Service_Calendar_EventDateTime();
$start->setDateTime(date3339(strtotime($unavailable['start_datetime'])));
$event->setStart($start);
$end = new Google_Service_Calendar_EventDateTime();
$end->setDateTime(date3339(strtotime($unavailable['end_datetime'])));
$event->setEnd($end);
// Add the new event to the google calendar.
$created_event = $this->service->events->insert($provider['settings']['google_calendar'], $event);
return $created_event;
}
/**
* Update Google Calendar unavailable period event.
*
* @param array $provider Contains the provider record data.
* @param array $unavailable Contains the unavailable period data.
*
* @return Google_Service_Calendar_Event Returns the Google_Service_Calendar_Event object.
*/
public function update_unavailable($provider, $unavailable)
{
$this->framework->load->helper('general');
$event = $this->service->events->get($provider['settings']['google_calendar'],
$unavailable['id_google_calendar']);
$event->setDescription($unavailable['notes']);
$start = new Google_Service_Calendar_EventDateTime();
$start->setDateTime(date3339(strtotime($unavailable['start_datetime'])));
$event->setStart($start);
$end = new Google_Service_Calendar_EventDateTime();
$end->setDateTime(date3339(strtotime($unavailable['end_datetime'])));
$event->setEnd($end);
$updated_event = $this->service->events->update($provider['settings']['google_calendar'],
$event->getId(), $event);
return $updated_event;
}
/**
* Delete unavailable period event from Google Calendar.
*
* @param array $provider Contains the provider record data.
* @param string $google_event_id Google Calendar event id to be deleted.
*/
public function delete_unavailable($provider, $google_event_id)
{
try
{
$this->service->events->delete($provider['settings']['google_calendar'], $google_event_id);
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}
catch (Exception $ex)
{
// Event was not found on Google Calendar.
}
}
/**
* Get an event object from gcal
*
* @param array $provider Contains the provider record data.
* @param string $google_event_id Id of the google calendar event.
*
* @return Google_Service_Calendar_Event Returns the google event object.
*/
public function get_event($provider, $google_event_id)
{
return $this->service->events->get($provider['settings']['google_calendar'], $google_event_id);
}
/**
* Get all the events between the sync period.
*
* @param string $google_calendar The name of the google calendar to be used.
* @param string $start The start date of sync period.
* @param string $end The end date of sync period.
*
* @return object Returns an array with Google_Service_Calendar_Event objects that belong on the given
* sync period (start, end).
*/
public function get_sync_events($google_calendar, $start, $end)
{
$this->framework->load->helper('general');
$params = [
'timeMin' => date3339($start),
'timeMax' => date3339($end),
'singleEvents' => TRUE,
];
return $this->service->events->listEvents($google_calendar, $params);
}
/**
* Return available google calendars for specific user.
*
* The given user's token must already exist in db in order to get access to his
* Google Calendar account.
*
* @param string $google_token The user's token will be used to grant access to google calendar.
*
* @return array Returns an array with the available calendars.
*/
public function get_google_calendars()
{
$calendarList = $this->service->calendarList->listCalendarList();
$calendars = [];
foreach ($calendarList->items as $google_calendar)
{
if ($google_calendar->getAccessRole() === 'reader')
{
continue;
}
$calendars[] = [
'id' => $google_calendar->id,
'summary' => $google_calendar->summary
];
}
return $calendars;
}
}