Added a basic text to PDF renderer.

src/Controller/LabelController.php

@@ -0,0 +1,59 @@
+<?php
+/**
+ * This file is part of Part-DB (https://github.com/Part-DB/Part-DB-symfony).
+ *
+ * Copyright (C) 2019 - 2020 Jan Böhmer (https://github.com/jbtronics)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published
+ * by the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+namespace App\Controller;
+
+
+use App\Entity\LabelSystem\LabelProfile;
+use App\Entity\Parts\Part;
+use App\Helpers\LabelResponse;
+use App\Services\LabelSystem\LabelGenerator;
+use Symfony\Bundle\FrameworkBundle\Controller\AbstractController;
+use Symfony\Component\HttpFoundation\BinaryFileResponse;
+use Symfony\Component\HttpFoundation\Response;
+use Symfony\Component\HttpFoundation\ResponseHeaderBag;
+use Symfony\Component\Routing\Annotation\Route;
+
+/**
+ * @Route("/label")
+ * @package App\Controller
+ */
+class LabelController extends AbstractController
+{
+    protected $labelGenerator;
+
+    public function __construct(LabelGenerator $labelGenerator)
+    {
+        $this->labelGenerator = $labelGenerator;
+    }
+
+    /**
+     * @Route("/{profile}/{part}/view")
+     */
+    public function view(LabelProfile $profile, Part $part)
+    {
+        $label = $this->labelGenerator->generateLabel($profile->getOptions(), $part);
+
+        $response = new LabelResponse($label);
+        $response->setContentDisposition(ResponseHeaderBag::DISPOSITION_INLINE, 'label.pdf');
+
+        return $response;
+    }
+}

src/Helpers/LabelResponse.php

@@ -0,0 +1,110 @@
+<?php
+/**
+ * This file is part of Part-DB (https://github.com/Part-DB/Part-DB-symfony).
+ *
+ * Copyright (C) 2019 - 2020 Jan Böhmer (https://github.com/jbtronics)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published
+ * by the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+namespace App\Helpers;
+
+
+use Symfony\Component\HttpFoundation\BinaryFileResponse;
+use Symfony\Component\HttpFoundation\File\File;
+use Symfony\Component\HttpFoundation\Request;
+use Symfony\Component\HttpFoundation\Response;
+
+class LabelResponse extends Response
+{
+    public function __construct($content = '', int $status = 200, array $headers = [])
+    {
+        parent::__construct($content, $status, $headers);
+    }
+
+    public function setContent($content)
+    {
+        parent::setContent($content);
+
+        $this->setAutoEtag();
+        $this->setAutoLastModified();
+        return $this;
+    }
+
+    public function prepare(Request $request)
+    {
+        parent::prepare($request);
+
+        $this->headers->set('Content-Type','application/pdf');
+
+
+        if ('HTTP/1.0' !== $request->server->get('SERVER_PROTOCOL')) {
+            $this->setProtocolVersion('1.1');
+        }
+
+        $this->ensureIEOverSSLCompatibility($request);
+    }
+
+    /**
+     * Automatically sets the Last-Modified header according the file modification date.
+     */
+    public function setAutoLastModified()
+    {
+        $this->setLastModified(new \DateTime());
+
+        return $this;
+    }
+
+    /**
+     * Automatically sets the ETag header according to the checksum of the file.
+     */
+    public function setAutoEtag()
+    {
+        $this->setEtag(base64_encode(hash('sha256', $this->content, true)));
+
+        return $this;
+    }
+
+    /**
+     * Sets the Content-Disposition header with the given filename.
+     *
+     * @param string $disposition      ResponseHeaderBag::DISPOSITION_INLINE or ResponseHeaderBag::DISPOSITION_ATTACHMENT
+     * @param string $filename         Optionally use this UTF-8 encoded filename instead of the real name of the file
+     * @param string $filenameFallback A fallback filename, containing only ASCII characters. Defaults to an automatically encoded filename
+     *
+     * @return $this
+     */
+    public function setContentDisposition($disposition, $filename, $filenameFallback = '')
+    {
+        if ('' === $filenameFallback && (!preg_match('/^[\x20-\x7e]*$/', $filename) || false !== strpos($filename, '%'))) {
+            $encoding = mb_detect_encoding($filename, null, true) ?: '8bit';
+
+            for ($i = 0, $filenameLength = mb_strlen($filename, $encoding); $i < $filenameLength; ++$i) {
+                $char = mb_substr($filename, $i, 1, $encoding);
+
+                if ('%' === $char || \ord($char) < 32 || \ord($char) > 126) {
+                    $filenameFallback .= '_';
+                } else {
+                    $filenameFallback .= $char;
+                }
+            }
+        }
+
+        $dispositionHeader = $this->headers->makeDisposition($disposition, $filename, $filenameFallback);
+        $this->headers->set('Content-Disposition', $dispositionHeader);
+
+        return $this;
+    }
+
+}

src/Services/LabelSystem/LabelGenerator.php

@@ -0,0 +1,81 @@
+<?php
+/**
+ * This file is part of Part-DB (https://github.com/Part-DB/Part-DB-symfony).
+ *
+ * Copyright (C) 2019 - 2020 Jan Böhmer (https://github.com/jbtronics)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published
+ * by the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+namespace App\Services\LabelSystem;
+
+
+use App\Entity\Contracts\NamedElementInterface;
+use App\Entity\LabelSystem\LabelOptions;
+use App\Entity\Parts\Part;
+use App\Services\ElementTypeNameGenerator;
+use Dompdf\Dompdf;
+use Twig\Environment;
+
+class LabelGenerator
+{
+    protected const CLASS_SUPPORT_MAPPING = [
+        'part' => Part::class,
+    ];
+
+    public const MM_TO_POINTS_FACTOR = 2.83465;
+
+    protected $labelHTMLGenerator;
+
+    public function __construct(LabelHTMLGenerator $labelHTMLGenerator)
+    {
+        $this->labelHTMLGenerator = $labelHTMLGenerator;
+    }
+
+    public function generateLabel(LabelOptions $options, object $element): string
+    {
+        if (!$this->supports($options, $element)) {
+            throw new \InvalidArgumentException('The given options are not compatible with the given element!');
+        }
+
+        $dompdf = new Dompdf();
+        $dompdf->loadHtml($this->labelHTMLGenerator->getLabelHTML($options, $element));
+
+        $dompdf->setPaper($this->mmToPointsArray($options->getWidth(), $options->getHeight()));
+
+        $dompdf->render();
+        return $dompdf->output();
+    }
+
+    /**
+     * Check if the given LabelOptions can be used with $element.
+     * @param  LabelOptions  $options
+     * @param  object  $element
+     * @return bool
+     */
+    public function supports(LabelOptions $options, object $element)
+    {
+        $supported_type = $options->getSupportedElement();
+        if (!isset(static::CLASS_SUPPORT_MAPPING[$supported_type])) {
+            throw new \InvalidArgumentException('Supported type name of the Label options not known!');
+        }
+
+        return is_a($element, static::CLASS_SUPPORT_MAPPING[$supported_type]);
+    }
+
+    public function mmToPointsArray(float $width, float $height): array
+    {
+        return [0, 0, $width * self::MM_TO_POINTS_FACTOR, $height * self::MM_TO_POINTS_FACTOR];
+    }
+}

src/Services/LabelSystem/LabelHTMLGenerator.php

@@ -0,0 +1,55 @@
+<?php
+/**
+ * This file is part of Part-DB (https://github.com/Part-DB/Part-DB-symfony).
+ *
+ * Copyright (C) 2019 - 2020 Jan Böhmer (https://github.com/jbtronics)
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published
+ * by the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+namespace App\Services\LabelSystem;
+
+use App\Entity\Contracts\NamedElementInterface;
+use App\Entity\LabelSystem\LabelOptions;
+use App\Services\ElementTypeNameGenerator;
+use Twig\Environment;
+
+class LabelHTMLGenerator
+{
+    protected $twig;
+    protected $elementTypeNameGenerator;
+
+    public function __construct(ElementTypeNameGenerator $elementTypeNameGenerator, Environment $twig)
+    {
+        $this->twig = $twig;
+        $this->elementTypeNameGenerator = $elementTypeNameGenerator;
+    }
+
+    public function getLabelHTML(LabelOptions $options, object $element): string
+    {
+        return $this->twig->render('labels/base_label.html.twig', [
+            'meta_title' => $this->getPDFTitle($options, $element),
+            'lines' => $options->getLines(),
+        ]);
+    }
+
+    protected function getPDFTitle(LabelOptions $options, object $element)
+    {
+        if ($element instanceof NamedElementInterface) {
+            return $this->elementTypeNameGenerator->getTypeNameCombination($element, false);
+        }
+
+        return 'Part-DB label';
+    }
+}