Next major version 2 with PHP 8.1, Symfony 6, Tabler UI, 2FA ... (#2902)

src/Pdf/MPdfConverter.php

@@ -0,0 +1,102 @@
+<?php
+
+/*
+ * This file is part of the Kimai time-tracking app.
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+namespace App\Pdf;
+
+use App\Constants;
+use App\Utils\FileHelper;
+use Mpdf\Config\ConfigVariables;
+use Mpdf\Config\FontVariables;
+use Mpdf\Mpdf;
+use Mpdf\Output\Destination;
+
+final class MPdfConverter implements HtmlToPdfConverter
+{
+    public function __construct(private FileHelper $fileHelper, private string $cacheDirectory)
+    {
+    }
+
+    private function sanitizeOptions(array $options): array
+    {
+        $configs = new ConfigVariables();
+        $fonts = new FontVariables();
+        $allowed = [
+            'mode', 'format', 'default_font_size', 'default_font', 'margin_left', 'margin_right', 'margin_top',
+            'margin_bottom', 'margin_header', 'margin_footer', 'orientation',
+        ];
+
+        $filtered = array_filter($options, function ($key) use ($allowed, $configs, $fonts): bool {
+            if (!\in_array($key, $allowed)) {
+                if (!\array_key_exists($key, $configs->getDefaults())) {
+                    return \array_key_exists($key, $fonts->getDefaults());
+                }
+            }
+
+            return true;
+        }, ARRAY_FILTER_USE_KEY);
+
+        if (\array_key_exists('tempDir', $filtered)) {
+            unset($filtered['tempDir']);
+        }
+
+        return $filtered;
+    }
+
+    /**
+     * @param string $html
+     * @param array $options
+     * @return string
+     * @throws \Mpdf\MpdfException
+     */
+    public function convertToPdf(string $html, array $options = []): string
+    {
+        $sanitized = array_merge(
+            $this->sanitizeOptions($options),
+            ['tempDir' => $this->cacheDirectory, 'exposeVersion' => false]
+        );
+
+        $mpdf = new Mpdf($sanitized);
+        $mpdf->creator = Constants::SOFTWARE;
+
+        if (\array_key_exists('fonts', $options)) {
+            $mpdf->AddFontDirectory($this->fileHelper->getDataDirectory('fonts'));
+            foreach ($options['fonts'] as $fontName => $fontConfig) {
+                $mpdf->AddFont($fontName, $fontConfig);
+            }
+        }
+
+        // some OS'es do not follow the PHP default settings
+        if ((int) \ini_get('pcre.backtrack_limit') < 1000000) {
+            @ini_set('pcre.backtrack_limit', '1000000');
+        }
+
+        // large amount of data take time
+        @ini_set('max_execution_time', '120');
+
+        // reduce the size of content parts that are passed to MPDF, to prevent
+        // https://mpdf.github.io/troubleshooting/known-issues.html#blank-pages-or-some-sections-missing
+        $parts = explode('<pagebreak>', $html);
+        for ($i = 0; $i < \count($parts); $i++) {
+            if (stripos($parts[$i], '<!-- CONTENT_PART -->') !== false) {
+                $subParts = explode('<!-- CONTENT_PART -->', $parts[$i]);
+                foreach ($subParts as $subPart) {
+                    $mpdf->WriteHTML($subPart);
+                }
+            } else {
+                $mpdf->WriteHTML($parts[$i]);
+            }
+
+            if ($i < \count($parts) - 1) {
+                $mpdf->WriteHTML('<pagebreak>');
+            }
+        }
+
+        return $mpdf->Output('', Destination::STRING_RETURN);
+    }
+}