Allow to specifiy a path to a builtin ressource via the url field.

src/Validator/Constraints/UrlOrBuiltin.php

@@ -0,0 +1,46 @@
+<?php
+/**
+ *
+ * part-db version 0.1
+ * Copyright (C) 2005 Christoph Lechner
+ * http://www.cl-projects.de/
+ *
+ * part-db version 0.2+
+ * Copyright (C) 2009 K. Jacobs and others (see authors.php)
+ * http://code.google.com/p/part-db/
+ *
+ * Part-DB Version 0.4+
+ * Copyright (C) 2016 - 2019 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 General Public License
+ * as published by the Free Software Foundation; either version 2
+ * 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
+ *
+ */
+
+namespace App\Validator\Constraints;
+
+
+use App\Entity\Attachments\Attachment;
+use Symfony\Component\Validator\Constraints\Url;
+
+/**
+ * Constraints the field that way that the content is either a url or a path to a builtin ressource (like %FOOTPRINTS%)
+ * @package App\Validator\Constraints
+ */
+class UrlOrBuiltin extends Url
+{
+    /** @var array A list of the placeholders that are treated as builtin */
+    public $allowed_placeholders = Attachment::BUILTIN_PLACEHOLDER;
+}

src/Validator/Constraints/UrlOrBuiltinValidator.php

@@ -0,0 +1,76 @@
+<?php
+/**
+ *
+ * part-db version 0.1
+ * Copyright (C) 2005 Christoph Lechner
+ * http://www.cl-projects.de/
+ *
+ * part-db version 0.2+
+ * Copyright (C) 2009 K. Jacobs and others (see authors.php)
+ * http://code.google.com/p/part-db/
+ *
+ * Part-DB Version 0.4+
+ * Copyright (C) 2016 - 2019 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 General Public License
+ * as published by the Free Software Foundation; either version 2
+ * 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA
+ *
+ */
+
+namespace App\Validator\Constraints;
+
+
+use Symfony\Component\Validator\Constraint;
+use Symfony\Component\Validator\Constraints\UrlValidator;
+use Symfony\Component\Validator\Exception\UnexpectedTypeException;
+use Symfony\Component\Validator\Exception\UnexpectedValueException;
+
+/**
+ * The validator for UrlOrBuiltin.
+ * It checks if the value is either a builtin ressource or a valid url.
+ * In both cases it is not checked, if the ressource is really existing.
+ * @package App\Validator\Constraints
+ */
+class UrlOrBuiltinValidator extends UrlValidator
+{
+    public function validate($value, Constraint $constraint)
+    {
+        if (!$constraint instanceof UrlOrBuiltin) {
+            throw new UnexpectedTypeException($constraint, UrlOrBuiltin::class);
+        }
+
+        if (null === $value || '' === $value) {
+            return;
+        }
+        if (!is_scalar($value) && !(\is_object($value) && method_exists($value, '__toString'))) {
+            throw new UnexpectedValueException($value, 'string');
+        }
+        $value = (string) $value;
+        if ('' === $value) {
+            return;
+        }
+
+        //After the %PLACEHOLDER% comes a slash, so we can check if we have a placholder via explode
+        $tmp = explode('/', $value);
+        //Builtins must have a %PLACEHOLDER% construction
+        if (!empty($tmp) && in_array($tmp[0], $constraint->allowed_placeholders, false)) {
+            return;
+        }
+
+        parent::validate($value, $constraint); // TODO: Change the autogenerated stub
+    }
+
+
+}