Added basic placeholder providers for parts.

src/Services/LabelSystem/PlaceholderProviders/AbstractDBElementProvider.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\PlaceholderProviders;
+
+
+use App\Entity\Base\AbstractDBElement;
+use App\Services\ElementTypeNameGenerator;
+
+class AbstractDBElementProvider implements PlaceholderProviderInterface
+{
+    protected $elementTypeNameGenerator;
+
+    public function __construct(ElementTypeNameGenerator $elementTypeNameGenerator)
+    {
+        $this->elementTypeNameGenerator = $elementTypeNameGenerator;
+    }
+
+    /**
+     * @inheritDoc
+     */
+    public function replace(string $placeholder, object $label_target, array $options = []): ?string
+    {
+        if ($label_target instanceof AbstractDBElement) {
+
+            if ($placeholder === '%%TYPE%%') {
+                return $this->elementTypeNameGenerator->getLocalizedTypeLabel($label_target);
+            }
+
+            if ($placeholder === '%%ID%%') {
+                return (string) ($label_target->getID() ?? 'unknown');
+            }
+
+        }
+
+        return null;
+    }
+}