easyappointments/src/application/controllers/google.php

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<?php if ( ! defined('BASEPATH')) exit('No direct script access allowed');
class Google extends CI_Controller {
/**
* Authorize Google Calendar API usage for a specific provider.
*
* Since it is required to follow the web application flow, in order to retrieve
* a refresh token from the Google API service, this method is going to authorize
* the given provider.
*
* @param int $provider_id The provider id, for whom the sync authorization is
* made.
*/
public function oauth($provider_id) {
// Store the provider id for use on the callback function.
if (!isset($_SESSION)) {
@session_start();
}
$_SESSION['oauth_provider_id'] = $provider_id;
// Redirect browser to google user content page.
$this->load->library('Google_Sync');
header('Location: ' . $this->google_sync->get_auth_url());
}
/**
* Callback method for the Google Calendar API authorization process.
*
* Once the user grants consent with his Google Calendar data usage, the Google
* OAuth service will redirect him back in this page. Here we are going to store
* the refresh token, because this is what will be used to generate access tokens
* in the future.
*
* <strong>IMPORTANT!</strong> Because it is necessary to authorize the application
* using the web server flow (see official documentation of OAuth), every
* Easy!Appointments installation should use its own calendar api key. So in every
* api console account, the "http://path-to-e!a/google/oauth_callback" should be
* included in an allowed redirect url.
*/
public function oauth_callback() {
if (isset($_GET['code'])) {
$this->load->library('Google_Sync');
$token = $this->google_sync->authenticate($_GET['code']);
// Store the token into the database for future reference.
if (!isset($_SESSION)) {
@session_start();
}
if (isset($_SESSION['oauth_provider_id'])) {
$this->load->model('Providers_Model');
$this->Providers_Model->set_setting('google_sync', TRUE,
$_SESSION['oauth_provider_id']);
$this->Providers_Model->set_setting('google_token', $token,
$_SESSION['oauth_provider_id']);
} else {
echo '<h1>Sync provider id not specified!</h1>';
}
} else {
echo '<h1>Authorization Failed!</h1>';
}
}
}
/* End of file google.php */
/* Location: ./application/controllers/google.php */