307 lines
9.7 KiB
PHP
Executable File
307 lines
9.7 KiB
PHP
Executable File
<?php // This file is part of LibreQR, which is distributed under the GNU AGPLv3+ license
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use Endroid\QrCode\Builder\Builder;
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use Endroid\QrCode\ErrorCorrectionLevel\ErrorCorrectionLevelLow;
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use Endroid\QrCode\ErrorCorrectionLevel\ErrorCorrectionLevelMedium;
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use Endroid\QrCode\ErrorCorrectionLevel\ErrorCorrectionLevelQuartile;
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use Endroid\QrCode\ErrorCorrectionLevel\ErrorCorrectionLevelHigh;
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use Endroid\QrCode\Color\Color;
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require "config.inc.php";
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require "vendor/autoload.php";
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define("LIBREQR_VERSION", "2.0.0");
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// Defines the locale to be used
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$locale = DEFAULT_LOCALE;
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if (isset($_SERVER['HTTP_ACCEPT_LANGUAGE'])) {
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$clientLocales = $_SERVER['HTTP_ACCEPT_LANGUAGE'];
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$clientLocales = preg_replace("#[A-Z0-9]|q=|;|-|\.#", "", $clientLocales);
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$clientLocales = explode(',', $clientLocales);
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foreach (array_diff(scandir("locales"), array('..', '.')) as $key => $localeFile)
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$availableLocales[$key] = basename($localeFile, ".php");
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foreach ($clientLocales as $clientLocale) {
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if (in_array($clientLocale, $availableLocales)) {
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$locale = $clientLocale;
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break;
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}
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}
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}
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require "locales/" . $locale . ".php";
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$params = array(
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"txt" => "",
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"redundancy" => DEFAULT_REDUNDANCY,
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"margin" => DEFAULT_MARGIN,
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"size" => DEFAULT_SIZE,
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"bgColor" => DEFAULT_BGCOLOR,
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"fgColor" => DEFAULT_FGCOLOR,
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);
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$qrCodeAvailable = NULL;
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if (
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isset($_POST['txt'])
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AND isset($_POST['redundancy'])
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AND isset($_POST['margin'])
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AND isset($_POST['size'])
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AND isset($_POST['bgColor'])
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AND isset($_POST['fgColor'])
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) {
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$qrCodeAvailable = true;
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if (strlen($_POST['txt']) >= 1 AND strlen($_POST['txt']) <= 4096) {
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$params['txt'] = $_POST['txt'];
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} else {
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http_response_code(400);
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exit("Wrong value for txt");
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}
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if ($_POST['redundancy'] === "low" OR $_POST['redundancy'] === "medium" OR $_POST['redundancy'] === "quartile" OR $_POST['redundancy'] === "high") {
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$params['redundancy'] = $_POST['redundancy'];
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} else {
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http_response_code(400);
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exit("Wrong value for redundancy");
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}
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if (is_numeric($_POST['margin']) AND $_POST['margin'] >= 0 AND $_POST['margin'] <= 1024) {
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$params['margin'] = $_POST['margin'];
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} else if (empty($_POST['margin'])) {
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$params['margin'] = NULL;
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} else {
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http_response_code(400);
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exit("Wrong value for margin");
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}
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if (is_numeric($_POST['size']) AND $_POST['size'] >= 21 AND $_POST['size'] <= 4096) {
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$params['size'] = $_POST['size'];
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} else if (empty($_POST['size'])) {
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$params['size'] = NULL;
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} else {
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http_response_code(400);
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exit("Wrong value for size");
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}
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if (preg_match("/^#[abcdefABCDEF0-9]{6}$/", $_POST['bgColor'])) {
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$params['bgColor'] = substr($_POST['bgColor'], -6);
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} else {
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http_response_code(400);
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exit("Wrong value for bgColor");
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}
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if (preg_match("/^#[abcdefABCDEF0-9]{6}$/", $_POST['fgColor'])) {
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$params['fgColor'] = substr($_POST['fgColor'], -6);
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} else {
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http_response_code(400);
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exit("Wrong value for fgColor");
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}
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$validFormSubmitted = true;
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$rgbBgColor = array(
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'r' => hexdec(substr($params['bgColor'],0,2)),
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'g' => hexdec(substr($params['bgColor'],2,2)),
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'b' => hexdec(substr($params['bgColor'],4,2)),
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);
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$qrCode = Builder::create()
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->data($params['txt']);
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if (!is_null($params['margin']))
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$qrCode->margin($params['margin']);
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if (!is_null($params['size']))
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$qrCode->size($params['size']);
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if ($params['redundancy'] === "high")
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$qrCode->errorCorrectionLevel(new ErrorCorrectionLevelHigh());
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else if ($params['redundancy'] === "quartile")
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$qrCode->errorCorrectionLevel(new ErrorCorrectionLevelQuartile());
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else if ($params['redundancy'] === "medium")
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$qrCode->errorCorrectionLevel(new ErrorCorrectionLevelMedium());
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else if ($params['redundancy'] === "low")
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$qrCode->errorCorrectionLevel(new ErrorCorrectionLevelLow());
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$qrCode
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->backgroundColor(new Color(
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$rgbBgColor['r'],
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$rgbBgColor['g'],
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$rgbBgColor['b']
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))
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->foregroundColor(new Color(
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hexdec(substr($params['fgColor'],0,2)),
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hexdec(substr($params['fgColor'],2,2)),
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hexdec(substr($params['fgColor'],4,2))
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));
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try {
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$result = $qrCode->build();
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} catch (Exception $ex) {
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http_response_code(500);
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$qrCodeAvailable = false;
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error_log("LibreQR encountered an error while generating a QR code: " . $ex);
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}
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}
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?>
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<!DOCTYPE html>
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<html lang="<?= $locale ?>">
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<head>
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<meta charset="utf-8">
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<title>LibreQR · <?= $loc['subtitle'] ?></title>
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<meta name="description" content="<?= $loc['description'] ?>">
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<meta name="viewport" content="width=device-width, initial-scale=1">
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<meta name="color-scheme" content="dark light">
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<meta name="application-name" content="LibreQR">
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<meta name="referrer" content="no-referrer">
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<meta http-equiv="Content-Security-Policy" content="default-src 'none'; img-src 'self' data:; style-src 'self'; form-action 'self';">
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<?php
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require "themes/" . THEME . "/theme.php";
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$colorScheme['theme'] = THEME;
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$options = array('cache_dir' => 'css/', 'compress' => true);
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$cssFileName = Less_Cache::Get(array("style.less" => ""), $options, $colorScheme);
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?>
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<link rel="stylesheet" media="screen" href="css/<?= $cssFileName ?>">
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<?php
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foreach($themeDimensionsIcons as $dimFav) // Set all icons dimensions
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echo ' <link rel="icon" type="image/png" href="themes/' . THEME . '/icons/' . $dimFav . '.png" sizes="' . $dimFav . 'x' . $dimFav . '">' . "\n";
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?>
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</head>
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<body>
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<header>
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<a id="linkTitles" href="./">
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<div id="titles">
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<h1>LibreQR</h1>
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<h2><?= $loc['subtitle'] ?></h2>
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</div>
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</a>
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</header>
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<form method="post" action="./#output">
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<div class="param" id="txtParam">
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<details>
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<summary><label for="txt"><?= $loc['label_content'] ?></label></summary>
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<div class="helpText">
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<?= $loc['help_content'] ?>
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</div>
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</details>
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<textarea rows="3" required="" id="txt" placeholder="<?= $loc['placeholder'] ?>" name="txt"><?= htmlspecialchars($params['txt']) ?></textarea>
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</div>
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<div id="sideParams">
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<div class="param">
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<details>
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<summary><label for="redundancy"><?= $loc['label_redundancy'] ?></label></summary>
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<p class="helpText">
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<?= $loc['help_redundancy'] ?>
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</p>
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</details>
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<select id="redundancy" name="redundancy">
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<option <?php if ($params['redundancy'] === "low") echo 'selected="" '; ?>value="low">L - 7%</option>
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<option <?php if ($params['redundancy'] === "medium") echo 'selected="" '; ?>value="medium">M - 15%</option>
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<option <?php if ($params['redundancy'] === "quartile") echo 'selected="" '; ?>value="quartile">Q - 25%</option>
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<option <?php if ($params['redundancy'] === "high") echo 'selected="" '; ?>value="high">H - 30%</option>
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</select>
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</div>
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<div class="param">
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<details>
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<summary><label for="margin"><?= $loc['label_margin'] ?></label></summary>
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<p class="helpText">
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<?= $loc['help_margin'] ?>
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</p>
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</details>
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<input type="number" id="margin" placeholder="<?= DEFAULT_MARGIN ?>" name="margin" required="" min="0" max="1024" value="<?= htmlspecialchars($params['margin']) ?>">
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</div>
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<div class="param">
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<details>
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<summary><label for="size"><?= $loc['label_size'] ?></label></summary>
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<p class="helpText">
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<?= $loc['help_size'] ?>
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</p>
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</details>
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<input type="number" id="size" placeholder="<?= DEFAULT_SIZE ?>" name="size" required="" min="21" max="4096" value="<?= htmlspecialchars($params['size']) ?>">
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</div>
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</div>
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<div id="colors">
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<div class="param">
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<label for="bgColor"><?= $loc['label_bgColor'] ?></label>
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<input type="color" name="bgColor" id="bgColor" value="#<?= htmlspecialchars($params['bgColor']) ?>">
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</div>
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<div class="param">
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<label for="fgColor"><?= $loc['label_fgColor'] ?></label>
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<input type="color" name="fgColor" id="fgColor" value="#<?= htmlspecialchars($params['fgColor']) ?>">
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</div>
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</div>
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<div class="centered">
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<input class="button" type="submit" value="<?= $loc['button_create'] ?>" />
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</div>
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</form>
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<?php
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if ($qrCodeAvailable) {
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$dataUri = $result->getDataUri();
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$qrSize = $params['size'] + 2 * $params['margin'];
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?>
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<section id="output">
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<div class="centered" id="downloadQR">
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<a href="<?= $dataUri ?>" class="button" download="<?= htmlspecialchars($params['txt']); ?>.png"><?= $loc['button_download'] ?></a>
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</div>
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<div class="centered" id="showOnlyQR">
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<a title="<?= $loc['title_showOnlyQR'] ?>" href="<?= $dataUri ?>"><img width="<?= $qrSize ?>" height="<?= $qrSize ?>" alt='<?= $loc['alt_QR_before'] ?><?= htmlspecialchars($params['txt']); ?><?= $loc['alt_QR_after'] ?>' id="qrCode"<?php
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// Compute the difference between the QR code and theme background colors
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$diffLight = abs($rgbBgColor['r']-hexdec(substr($colorScheme['bg-light'],-6,2))) + abs($rgbBgColor['g']-hexdec(substr($colorScheme['bg-light'],-4,2))) + abs($rgbBgColor['b']-hexdec(substr($colorScheme['bg-light'],-2,2)));
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$diffDark = abs($rgbBgColor['r']-hexdec(substr($colorScheme['bg-dark'],-6,2))) + abs($rgbBgColor['g']-hexdec(substr($colorScheme['bg-dark'],-4,2))) + abs($rgbBgColor['b']-hexdec(substr($colorScheme['bg-dark'],-2,2)));
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// Determine whether a CSS corner is needed to let the user see the margin of the QR code
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$contrastThreshold = 64;
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if ($diffLight < $contrastThreshold)
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echo " class='needLightContrast'";
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if ($diffDark < $contrastThreshold)
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echo " class='needDarkContrast'";
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?> src="<?= $dataUri ?>"></a>
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</div>
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</section>
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<?php
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} else if ($qrCodeAvailable === false) {
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echo " <p><strong>" . $loc['error_generation'] . "</strong></p></body></html>";
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}
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?>
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<footer>
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<section id="info" class="metaText">
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<?= $loc['metaText_qr'] ?>
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</section>
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<?php if (CUSTOM_TEXT_ENABLED) { ?>
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<section class="metaText">
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<?= CUSTOM_TEXT ?>
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</section>
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<?php } ?>
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<section class="metaText">
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<small><?= $loc['metaText_legal'] ?></small>
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</section>
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</footer>
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</body>
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</html>
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