Add files via upload
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Giandonato Inverso
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<?php
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/**
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* PHP Dynamic Qr code
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*
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* @author Giandonato Inverso <info@giandonatoinverso.it>
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* @copyright Copyright (c) 2020-2021
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* @license https://opensource.org/licenses/MIT MIT License
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* @link https://github.com/giandonatoinverso/PHP-Dynamic-Qr-code
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* @version 1.0
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*/
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require_once 'config/config.php';
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class Dynamic_Qrcode
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{
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/**
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*
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*/
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public function __construct()
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{
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}
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/**
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*
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*/
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public function __destruct()
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{
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}
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/**
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* Set friendly columns\' names to order tables\' entries
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* N.B. This function is called to generate the "list all" table
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*/
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public function setOrderingValues()
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{
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$ordering = [
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'id' => 'ID',
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'filename' => 'File Name',
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'identifier' => 'Identifier',
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'link' => 'Link',
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'qrcode' => 'Qr Code',
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'created_at' => 'Created at',
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'updated_at' => 'Updated at'
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];
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return $ordering;
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}
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/**
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* This private function is used by both add () and edit () of this class to initially store in the array that will be sent to the database the:
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* filename, created_at, link
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*/
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private function collect()
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{
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$data_to_db['filename'] = htmlspecialchars($_POST['filename'], ENT_QUOTES, 'UTF-8');
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$data_to_db['created_at'] = date('Y-m-d H:i:s');
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$data_to_db['link'] = htmlspecialchars($_POST['link'], ENT_QUOTES, 'UTF-8');
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return $data_to_db;
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}
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/**
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* Set option for qr code like:
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* Error Correction Level, size (default = 100), foreground, background
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* return array of values
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*/
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private function setOptions()
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{
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$errorCorrectionLevel = 'L';
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if (isset($_POST['level']) && in_array($_POST['level'], array('L','M','Q','H')))
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$errorCorrectionLevel = $_POST['level'];
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$size = 100;
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if (isset($_POST['size']))
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$size = min(max((int)$_POST['size'], 100), 1000);
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$foreground = substr($_POST['foreground'], 1); // We eliminate the character "#" for the hexadecimal color
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$background = substr($_POST['background'], 1);
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//$logo = $_POST['optionlogo'];
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return array(
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"errorCorrectionLevel" => $errorCorrectionLevel,
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"size" => $size,
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"foreground" => $foreground,
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"background" => $background,
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//"optionlogo" => $logo,
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);
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}
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/**
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* Add qr code
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* Check out http://goqr.me/api/ for more information
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* We save the file obtained with the chosen name and in the selected folder
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* We save into db the url of qrcode image
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*/
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public function add()
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{
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$data_to_db['created_by'] = $_SESSION['user_id'];
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$data_to_db = $this->collect();
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$data_to_db['format'] = $_POST['format'];
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// for the identifier we create a random alphanumeric string through the function "randomString" in helpers.php > config.php
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$data_to_db['identifier'] = randomString(rand(5,8));
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$data_to_db['qrcode'] = $data_to_db['filename'].'.'.$data_to_db['format'];
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$options = $this->setOptions();
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if(!file_exists(DIRECTORY.$data_to_db['filename'].'.'.$data_to_db['format'])){
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$content = file_get_contents('https://api.qrserver.com/v1/create-qr-code/?data='.READ_PATH.$data_to_db['identifier'].'&&size='.$options['size'].'x'.$options['size'].'&ecc='.$options['errorCorrectionLevel'].'&margin=0&color='.$options['foreground'].'&bgcolor='.$options['background'].'&qzone=2'.'&format='.$data_to_db['format']);
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$filename = DIRECTORY.$data_to_db['filename'].'.'.$data_to_db['format'];
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try{
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file_put_contents($filename, $content);
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}
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catch(Exception $e){
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$this->failure($e->getMessage());
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}
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// If you want you can customide qr code with logo
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//$this->addLogo($data_to_db['qrcode'], $options['optionlogo']);
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$db = getDbInstance();
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$last_id = $db->insert('dynamic_qrcodes', $data_to_db);
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}
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else
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$this->failure('You cannot create a new qr code with an existing name on the server!');
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if ($last_id){
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$this->success('Qr code added successfully!');
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}
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else{
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echo 'Insert failed: ' . $db->getLastError();
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exit();
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}
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}
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/**
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* Edit qr code
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*
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*/
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public function edit()
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{
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$db = getDbInstance();
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$dynamic_id = htmlspecialchars($_GET['dynamic_id'], ENT_QUOTES, 'UTF-8'); // get dynamic id
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$old_filename = htmlspecialchars($_GET['filename'], ENT_QUOTES, 'UTF-8'); // get filename
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$query = $db->query("SELECT format FROM dynamic_qrcodes WHERE id=$dynamic_id"); // get format
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$format = $query[0]['format'];
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$data_to_db = $this->collect();
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$data_to_db['state'] = $_POST['state']; // update link state
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$data_to_db['qrcode'] = $data_to_db['filename'].'.'.$format; // update qrcode in db
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if(!file_exists(DIRECTORY.$data_to_db['filename'].'.'.$format) || $data_to_db['filename'] == $old_filename){
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$db->where('id', $dynamic_id);
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$stat = $db->update('dynamic_qrcodes', $data_to_db);
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try{
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rename(DIRECTORY.$old_filename.'.'.$format, DIRECTORY.$data_to_db['filename'].'.'.$format);
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}
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catch(Exception $e){
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$this->failure($e->getMessage());
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}
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}
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else
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$this->failure('You cannot edit a qr code with an existing name on the server!');
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if ($stat){
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$this->success('Qr code updated successfully!');
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}
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else{
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echo 'Insert failed: ' . $db->getLastError();
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exit();
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}
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}
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/**
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* Delete qr code
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*
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*/
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public function cancel($dynamic_id, $filename)
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{
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if($_SESSION['admin_type']!='super')
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$this->failure('You don\'t have permission to perform this action');
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$db = getDbInstance();
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$query = $db->query("SELECT format FROM dynamic_qrcodes WHERE id=$dynamic_id");
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$format = $query[0]['format'];
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$db->where('id', $dynamic_id);
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$status = $db->delete('dynamic_qrcodes');
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try{
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unlink(DIRECTORY.$filename.'.'.$format);
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}
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catch(Exception $e){
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$this->failure($e->getMessage());
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}
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if ($status)
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$this->info('Qr code deleted successfully!');
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else
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$this->failure('Unable to delete qr code');
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}
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/**
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* Add logo
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* IMPORTANT: I do not recommend to use this option because there may be problems with the scanning of the qr code as some readers may not recognize the code
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*/
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private function addLogo($src, $logo = 'none')
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{
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try
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{
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if($logo != 'none')
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{
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$logo = imagecreatefrompng($_SERVER['HTTP_HOST'].'/admin'.$logo);
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$QR = imagecreatefrompng(BASE_PATH.$src);
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$QR_width = imagesx($QR);
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$QR_height = imagesy($QR);
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$logo_width = imagesx($logo);
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$logo_height = imagesy($logo);
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// Scale logo to fit in the QR Code
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$logo_qr_width = $QR_width/3;
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$scale = $logo_width/$logo_qr_width;
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$logo_qr_height = $logo_height/$scale;
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// You can try also with imagecopymerge() with same arguments
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imagecopyresampled($QR, $logo, $QR_width/3, $QR_height/3, 0, 0, $logo_qr_width, $logo_qr_height, $logo_width, $logo_height);
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//$output = Set directory for saving image;
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header('Content-Type: image/png');
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imagepng($QR /*, $output*/);
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imagedestroy($QR);
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}
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}
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catch(Exception $e)
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{
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$this->failure($e->getMessage());
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}
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}
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/* FLASH MESSAGE */
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/* 3 functions for 3 types of messages with different styles defined in the flash_message.php file
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Each function takes a string as input and after a redirection it prints the desired message
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*/
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/**
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* Flash message Failure process
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*/
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private function failure($message)
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{
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$_SESSION['failure'] = $message;
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// Redirect to the listing page
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header('Location: dynamic_qrcodes.php');
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// Important! Don't execute the rest put the exit/die.
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exit();
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}
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/**
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* Flash message Success process
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*/
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private function success($message)
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{
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$_SESSION['success'] = $message;
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// Redirect to the listing page
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header('Location: dynamic_qrcodes.php');
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// Important! Don't execute the rest put the exit/die.
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exit();
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}
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/**
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* Flash message Info process
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*/
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private function info($message)
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{
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$_SESSION['info'] = $message;
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// Redirect to the listing page
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header('Location: dynamic_qrcodes.php');
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// Important! Don't execute the rest put the exit/die.
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exit();
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}
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}
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?>
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