oauth2callback.php

<?php
// Copyright 2017 DAIMTO ([Linda Lawton](https://twitter.com/LindaLawtonDK)) :  [www.daimto.com](http://www.daimto.com/)
//
// Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except in compliance with
// the License. You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on
// an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the License for the
// specific language governing permissions and limitations under the License.
//------------------------------------------------------------------------------
// <auto-generated>
//     This code was generated by DAIMTO-Google-apis-Sample-generator 1.0.0
//     Template File Name:  ServiceAccount.tt
//     Build date: 2017-10-08
//     PHP generator version: 1.0.0
//     
//     Changes to this file may cause incorrect behavior and will be lost if
//     the code is regenerated.
// </auto-generated>
//------------------------------------------------------------------------------
// Installation
//
// The preferred method is via https://getcomposer.org. Follow the installation instructions https://getcomposer.org/doc/00-intro.md 
// if you do not already have composer installed.
//
// Once composer is installed, execute the following command in your project root to install this library:
//
// composer require google/apiclient:^2.0
//
//------------------------------------------------------------------------------ 
require_once __DIR__ . '/vendor/autoload.php';
require_once __DIR__ . '/Oauth2Authentication.php';

// Start a session to persist credentials.
session_start();

// Handle authorization flow from the server.
if (!isset($_GET['code'])) {
	$client = buildClient();
	$auth_url = $client->createAuthUrl();
	header('Location: ' . filter_var($auth_url, FILTER_SANITIZE_URL));
} else {
	$client = buildClient();
	$client->fetchAccessTokenWithAuthCode($_GET['code']); // Exchange the authentication code for a refresh token and access token.

  // Save token to credentials file.
  $credentialsPath = __DIR__ . DIRECTORY_SEPARATOR . 'credentials' . DIRECTORY_SEPARATOR . 'credentials.json';
  writeToCredentials($client, $credentialsPath);

  //Redirect back to main script
  $redirect_uri = str_replace("oauth2callback.php", $_SESSION['mainScript'] ?? '', $client->getRedirectUri());

  header('Location: ' . filter_var($redirect_uri, FILTER_SANITIZE_URL));
}