formAction.php

<?php
/*
 * Created on Mon Jan 17 2022
 *
 *  Devlan - devlan.co.ke 
 *
 * hello@devlan.info
 *
 *
 * The Devlan End User License Agreement
 *
 * Copyright (c) 2022 Devlan
 *
 * 1. GRANT OF LICENSE
 * Devlan hereby grants to you (an individual) the revocable, personal, non-exclusive, and nontransferable right to
 * install and activate this system on two separated computers solely for your personal and non-commercial use,
 * unless you have purchased a commercial license from Devlan. Sharing this Software with other individuals, 
 * or allowing other individuals to view the contents of this Software, is in violation of this license.
 * You may not make the Software available on a network, or in any way provide the Software to multiple users
 * unless you have first purchased at least a multi-user license from Devlan.
 *
 * 2. COPYRIGHT 
 * The Software is owned by Devlan and protected by copyright law and international copyright treaties. 
 * You may not remove or conceal any proprietary notices, labels or marks from the Software.
 *
 * 3. RESTRICTIONS ON USE
 * You may not, and you may not permit others to
 * (a) reverse engineer, decompile, decode, decrypt, disassemble, or in any way derive source code from, the Software;
 * (b) modify, distribute, or create derivative works of the Software;
 * (c) copy (other than one back-up copy), distribute, publicly display, transmit, sell, rent, lease or 
 * otherwise exploit the Software.  
 *
 * 4. TERM
 * This License is effective until terminated. 
 * You may terminate it at any time by destroying the Software, together with all copies thereof.
 * This License will also terminate if you fail to comply with any term or condition of this Agreement.
 * Upon such termination, you agree to destroy the Software, together with all copies thereof.
 *
 * 5. NO OTHER WARRANTIES. 
 * Devlan  DOES NOT WARRANT THAT THE SOFTWARE IS ERROR FREE. 
 * Devlan SOFTWARE DISCLAIMS ALL OTHER WARRANTIES WITH RESPECT TO THE SOFTWARE, 
 * EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO IMPLIED WARRANTIES OF MERCHANTABILITY, 
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT OF THIRD PARTY RIGHTS. 
 * SOME JURISDICTIONS DO NOT ALLOW THE EXCLUSION OF IMPLIED WARRANTIES OR LIMITATIONS
 * ON HOW LONG AN IMPLIED WARRANTY MAY LAST, OR THE EXCLUSION OR LIMITATION OF 
 * INCIDENTAL OR CONSEQUENTIAL DAMAGES,
 * SO THE ABOVE LIMITATIONS OR EXCLUSIONS MAY NOT APPLY TO YOU. 
 * THIS WARRANTY GIVES YOU SPECIFIC LEGAL RIGHTS AND YOU MAY ALSO 
 * HAVE OTHER RIGHTS WHICH VARY FROM JURISDICTION TO JURISDICTION.
 *
 * 6. SEVERABILITY
 * In the event of invalidity of any provision of this license, the parties agree that such invalidity shall not
 * affect the validity of the remaining portions of this license.
 *
 * 7. NO LIABILITY FOR CONSEQUENTIAL DAMAGES IN NO EVENT SHALL DEVLAN  OR ITS SUPPLIERS BE LIABLE TO YOU FOR ANY
 * CONSEQUENTIAL, SPECIAL, INCIDENTAL OR INDIRECT DAMAGES OF ANY KIND ARISING OUT OF THE DELIVERY, PERFORMANCE OR 
 * USE OF THE SOFTWARE, EVEN IF DEVLAN HAS BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES
 * IN NO EVENT WILL DEVLAN  LIABILITY FOR ANY CLAIM, WHETHER IN CONTRACT 
 * TORT OR ANY OTHER THEORY OF LIABILITY, EXCEED THE LICENSE FEE PAID BY YOU, IF ANY.
 */

require_once 'google-api-php-client/src/Google/Client.php';
require_once 'google-api-php-client/src/Google/Service/Oauth2.php';
require_once 'google-api-php-client/src/Google/Service/Drive.php';
session_start();

header('Content-Type: text/html; charset=utf-8');

// Init the variables
$driveInfo = "";
$folderName = "";
$folderDesc = "";

// Get the file path from the variable
$file_tmp_name = $_FILES["file"]["tmp_name"];

// Get the client Google credentials
$credentials = $_COOKIE["credentials"];

// Get your app info from JSON downloaded from google dev console
$json = json_decode(file_get_contents("GoogleCloud.json"), true);
$CLIENT_ID = '';
$CLIENT_SECRET = '';
$REDIRECT_URI = '';

// Create a new Client
$client = new Google_Client();
$client->setClientId($CLIENT_ID);
$client->setClientSecret($CLIENT_SECRET);
$client->setRedirectUri($REDIRECT_URI);
$client->addScope(
	"https://www.googleapis.com/auth/drive",
	"https://www.googleapis.com/auth/drive.appfolder"
);

// Refresh the user token and grand the privileges
$client->setAccessToken($credentials);
$service = new Google_Service_Drive($client);

// Set the file metadata for drive
$mimeType = $_FILES["file"]["type"];
$title = $_FILES["file"]["name"];
$description = "Uploaded from your very first google drive application!";

// Get the folder metadata
if (!empty($_POST["folderName"]))
	$folderName = $_POST["folderName"];
if (!empty($_POST["folderDesc"]))
	$folderDesc = $_POST["folderDesc"];

// Call the insert function with parameters listed below
$driveInfo = insertFile($service, $title, $description, $mimeType, $file_tmp_name, $folderName, $folderDesc);

/**
 * Get the folder ID if it exists, if it doesnt exist, create it and return the ID
 *
 * @param Google_DriveService $service Drive API service instance.
 * @param String $folderName Name of the folder you want to search or create
 * @param String $folderDesc Description metadata for Drive about the folder (optional)
 * @return Google_Drivefile that was created or got. Returns NULL if an API error occured
 */
function getFolderExistsCreate($service, $folderName, $folderDesc)
{
	// List all user files (and folders) at Drive root
	$files = $service->files->listFiles();
	$found = false;

	// Go through each one to see if there is already a folder with the specified name
	foreach ($files['items'] as $item) {
		if ($item['title'] == $folderName) {
			$found = true;
			return $item['id'];
			break;
		}
	}

	// If not, create one
	if ($found == false) {
		$folder = new Google_Service_Drive_DriveFile();

		//Setup the folder to create
		$folder->setTitle($folderName);

		if (!empty($folderDesc))
			$folder->setDescription($folderDesc);

		$folder->setMimeType('application/vnd.google-apps.folder');

		//Create the Folder
		try {
			$createdFile = $service->files->insert($folder, array(
				'mimeType' => 'application/vnd.google-apps.folder',
			));

			// Return the created folder's id
			return $createdFile->id;
		} catch (Exception $e) {
			print "An error occurred: " . $e->getMessage();
		}
	}
}

/**
 * Insert new file in the Application Data folder.
 *
 * @param Google_DriveService $service Drive API service instance.
 * @param string $title Title of the file to insert, including the extension.
 * @param string $description Description of the file to insert.
 * @param string $mimeType MIME type of the file to insert.
 * @param string $filename Filename of the file to insert.
 * @return Google_DriveFile The file that was inserted. NULL is returned if an API error occurred.
 */
function insertFile($service, $title, $description, $mimeType, $filename, $folderName, $folderDesc)
{
	$file = new Google_Service_Drive_DriveFile();

	// Set the metadata
	$file->setTitle($title);
	$file->setDescription($description);
	$file->setMimeType($mimeType);

	// Setup the folder you want the file in, if it is wanted in a folder
	if (isset($folderName)) {
		if (!empty($folderName)) {
			$parent = new Google_Service_Drive_ParentReference();
			$parent->setId(getFolderExistsCreate($service, $folderName, $folderDesc));
			$file->setParents(array($parent));
		}
	}
	try {
		// Get the contents of the file uploaded
		$data = file_get_contents($filename);

		// Try to upload the file, you can add the parameters e.g. if you want to convert a .doc to editable google format, add 'convert' = 'true'
		$createdFile = $service->files->insert($file, array(
			'data' => $data,
			'mimeType' => $mimeType,
			'uploadType' => 'multipart'
		));

		// Return a bunch of data including the link to the file we just uploaded
		return $createdFile;
	} catch (Exception $e) {
		print "An error occurred: " . $e->getMessage();
	}
}

echo "<br>Link to file: " . $driveInfo["alternateLink"];