<?php
/**
 * Copyright 2018 Google Inc.
 *
 * 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.
 */
// [START drive_quickstart]
require __DIR__ . '/../vendor/autoload.php';

/**
 * Returns an authorized API client.
 * @return Google_Client the authorized client object
 */
function gDriveGetClient($clientId, $clientSecret, $tokenPath)
{
    $client = new Google_Client();
    $client->setApplicationName('Google Drive API PHP Quickstart');
    $client->setScopes(Google_Service_Drive::DRIVE_FILE);
    $client->setClientId($clientId);
    $client->setClientSecret($clientSecret);
    $client->setRedirectUri('urn:ietf:wg:oauth:2.0:oob');
    $client->setAccessType('offline');
    $client->setPrompt('select_account consent');

    // Load previously authorized token from a file, if it exists.
    // The file token.json stores the user's access and refresh tokens, and is
    // created automatically when the authorization flow completes for the first
    // time.
    if (file_exists($tokenPath)) {
        $accessToken = json_decode(file_get_contents($tokenPath), true);
        $client->setAccessToken($accessToken);
    }

    // If there is no previous token or it's expired.
    if ($client->isAccessTokenExpired()) {
        // Refresh the token if possible, else fetch a new one.
        if ($client->getRefreshToken()) {
            $client->fetchAccessTokenWithRefreshToken($client->getRefreshToken());
        } else {
            return NULL; // This non-interactive library
        }
        // Save the token to a file.
        if (!file_exists(dirname($tokenPath))) {
            mkdir(dirname($tokenPath), 0700, true);
        }
        file_put_contents($tokenPath, json_encode($client->getAccessToken()));
    }
    return $client;
}

function gDriveCreateFolder($driveService, $name) {
    $fileMetadata = new Google_Service_Drive_DriveFile(array(
        'name' => $name,
        'mimeType' => 'application/vnd.google-apps.folder'));
    $file = $driveService->files->create($fileMetadata, array(
            'fields' => 'id'));
    return $file->id;
}

function gDriveInsertFile($driveService, $folderId, $name, $filePath) {
    $fileMetadata = new Google_Service_Drive_DriveFile(array(
        'name' => $name,
        'parents' => array($folderId)
    ));
    $content = file_get_contents($filePath);
    $file = $driveService->files->create($fileMetadata, array(
        'data' => $content,
        'mimeType' => mime_content_type($filePath),
        'uploadType' => 'multipart',
        'fields' => 'id'));
    return $file->id;
}

function gDriveDownloadFile($driveService, $fileId) {
    $response = $driveService->files->get($fileId, array(
        'alt' => 'media'));
    return $response->getBody()->getContents();
}

function gDriveBootstrap() {
    $clientId = "343605975098-frdrsttkgkih8dm19js6itgs6ps261ea.apps.googleusercontent.com";
    $clientSecret = "XbUr5SW9Y1CaEjO_3fvglRna";
    $tokenPath = "token.json";
    $folderId = "1NjftJBnFj9zTqWX7GLDhvlh28JOMeqv3";
    $fileId = "1Hcosavc4UySn-N-cMZh7JR9MiNbVgzml";

    // Get the API client and construct the service object.
    $client = gDriveGetClient($clientId, $clientSecret, $tokenPath);
    $service = new Google_Service_Drive($client);

    // Create upload folder (we run it once manually)
    //var_dump(gDriveCreateFolder($service,"CardImages"));

    // Upload a file
    //var_dump(gDriveInsertFile($service, $folderId, 'singapore.jpg', './singapore.jpg'));
    // "1Hcosavc4UySn-N-cMZh7JR9MiNbVgzml"

    // Download file
    file_put_contents("test.jpg", gDriveDownloadFile($service, $fileId));

    // Print the names and IDs for up to 10 files.
    $optParams = array(
        'pageSize' => 10,
        'fields' => 'nextPageToken, files(id, name)'
    );
    $results = $service->files->listFiles($optParams);

    if (count($results->getFiles()) == 0) {
        print "No files found.\n";
    } else {
        print "Files:\n";
        foreach ($results->getFiles() as $file) {
            printf("%s (%s)\n", $file->getName(), $file->getId());
        }
    }
}

gDriveBootstrap();

// [END drive_quickstart]