init commit

addons/qrcode/library/Endroid/QrCode/Writer/AbstractWriter.php

@@ -0,0 +1,92 @@
+<?php
+
+declare(strict_types=1);
+
+/*
+ * (c) Jeroen van den Enden <info@endroid.nl>
+ *
+ * This source file is subject to the MIT license that is bundled
+ * with this source code in the file LICENSE.
+ */
+
+namespace Endroid\QrCode\Writer;
+
+use Endroid\QrCode\Exception\GenerateImageException;
+use Endroid\QrCode\Exception\InvalidLogoException;
+use Endroid\QrCode\Exception\MissingExtensionException;
+use Endroid\QrCode\QrCodeInterface;
+
+abstract class AbstractWriter implements WriterInterface
+{
+    protected function getMimeType(string $path): string
+    {
+        if (false !== filter_var($path, FILTER_VALIDATE_URL)) {
+            return $this->getMimeTypeFromUrl($path);
+        }
+
+        return $this->getMimeTypeFromPath($path);
+    }
+
+    private function getMimeTypeFromUrl(string $url): string
+    {
+        /** @var mixed $format */
+        $format = PHP_VERSION > 80000 ? true : 1;
+
+        $headers = get_headers($url, $format);
+
+        if (!is_array($headers) || !isset($headers['Content-Type'])) {
+            throw new InvalidLogoException(sprintf('Content type could not be determined for logo URL "%s"', $url));
+        }
+
+        return $headers['Content-Type'];
+    }
+
+    private function getMimeTypeFromPath(string $path): string
+    {
+        if (!function_exists('mime_content_type')) {
+            throw new MissingExtensionException('You need the ext-fileinfo extension to determine logo mime type');
+        }
+
+        $mimeType = mime_content_type($path);
+
+        if (!is_string($mimeType)) {
+            throw new InvalidLogoException('Could not determine mime type');
+        }
+
+        if (!preg_match('#^image/#', $mimeType)) {
+            throw new GenerateImageException('Logo path is not an image');
+        }
+
+        // Passing mime type image/svg results in invisible images
+        if ('image/svg' === $mimeType) {
+            return 'image/svg+xml';
+        }
+
+        return $mimeType;
+    }
+
+    public function writeDataUri(QrCodeInterface $qrCode): string
+    {
+        $dataUri = 'data:'.$this->getContentType().';base64,'.base64_encode($this->writeString($qrCode));
+
+        return $dataUri;
+    }
+
+    public function writeFile(QrCodeInterface $qrCode, string $path): void
+    {
+        $string = $this->writeString($qrCode);
+        file_put_contents($path, $string);
+    }
+
+    public static function supportsExtension(string $extension): bool
+    {
+        return in_array($extension, static::getSupportedExtensions());
+    }
+
+    public static function getSupportedExtensions(): array
+    {
+        return [];
+    }
+
+    abstract public function getName(): string;
+}