<?php
namespace App\Http\Controllers;
use Google\Client as GoogleClient;
use Google\Service\Slides;
use Google\Service\Slides\BatchUpdatePresentationRequest;
use Google\Service\Slides\Presentation;
use Google\Service\Slides\CreateSlideRequest;
use Google\Service\Slides\LayoutPlaceholderIdMapping;
use Google\Service\Slides\InsertTextRequest;
class SlideController extends Controller
{
    public function index()
    {
        $credentialsPath = storage_path('app/slide-api-credential.json');
        $client = new GoogleClient();
        $client->setAuthConfig($credentialsPath);
        $client->addScope('Slides::PRESENTATIONS');
        $slides = new Slides($client);
        
        $presentation = new Presentation([
            'title' => 'My First Slide'
        ]);
        $slideRequests = [
            new CreateSlideRequest([
                'slideLayoutReference' => [
                    'predefinedLayout' => 'BLANK'
                ],
                'placeholderIdMappings' => [
                    new LayoutPlaceholderIdMapping([
                        'objectId' => 'TITLE',
                        'layoutPlaceholder' => [
                            'type' => 'TITLE'
                        ]
                    ]),
                    new LayoutPlaceholderIdMapping([
                        'objectId' => 'SUBTITLE',
                        'layoutPlaceholder' => [
                            'type' => 'SUBTITLE'
                        ]
                    ])
                ]
            ]),
            new InsertTextRequest([
                'objectId' => 'TITLE',
                'text' => 'Hello,'
            ]),
            new InsertTextRequest([
                'objectId' => 'SUBTITLE',
                'text' => 'World!'
            ])
        ];
        $batchUpdateRequest = new BatchUpdatePresentationRequest([
            'requests' => $slideRequests
        ]);
        $createdPresentation = $slides->presentations->create($presentation);
        $presentationId = $createdPresentation->presentationId;
        $slides->presentations->batchUpdate($presentationId, $batchUpdateRequest);
        return "Slide created with ID: $presentationId";
    }
}

public function index()
{
  /********* 生成客户端和OAuthToken ******************/
  $redirect_uri = 'http://' . $_SERVER['HTTP_HOST'] . $_SERVER['PHP_SELF'];
  $client = new GoogleClient();
  $client->setScopes('Slides::PRESENTATIONS');
  $client->setAuthConfig('app/slide-api-credential.json');
  $client->setRedirectUri($redirect_uri);
  $client->setAccessType('offline');
  $client->setPrompt('select_account consent');
  // 从文件中加载以前授权的令牌，如果存在。
  // 文件token.json存储用户的访问令牌和刷新令牌，在首次完成授权流程时会自动创建。
  $tokenPath = 'token.json';
  if (file_exists($tokenPath)) {
    $accessToken = json_decode(file_get_contents($tokenPath), true);
    $client->setAccessToken($accessToken);
  }
  // 如果没有以前的令牌或令牌已过期。
  if ($client->isAccessTokenExpired()) {
    // 如果可能，刷新令牌，否则获取一个新令牌。
    if ($client->getRefreshToken()) {
      $client->fetchAccessTokenWithRefreshToken($client->getRefreshToken());
    } else {
      // 请求用户授权。
      $authUrl = $client->createAuthUrl();
      header('Location:' . $authUrl);
      if (isset($_GET['code'])) {
        $accessToken = $client->fetchAccessTokenWithAuthCode($_GET['code'], $_SESSION['code_verifier']);
        $client->setAccessToken($accessToken);
        // 重定向回示例
        header('Location: ' . filter_var($redirect_uri, FILTER_SANITIZE_URL));
        $client->setAccessToken($accessToken);
      }
    }
    // 将令牌保存到文件中。
    if (!file_exists(dirname($tokenPath))) {
      mkdir(dirname($tokenPath), 0700, true);
    }
    file_put_contents($tokenPath, json_encode($client->getAccessToken()));
  }
  /******** 授权流程结束 *********/
  $slides = new Slides($client);
  $presentation = new Presentation([
    'title' => 'My First Slide'
  ]);
  ...