Added an basic table to show log entries.

src/Repository/LogEntryRepository.php

@@ -0,0 +1,75 @@
+<?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 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\Repository;
+
+
+use App\Entity\Base\DBElement;
+use App\Entity\LogSystem\AbstractLogEntry;
+use Doctrine\ORM\EntityRepository;
+
+class LogEntryRepository extends EntityRepository
+{
+
+    public function findBy(array $criteria, array $orderBy = null, $limit = null, $offset = null)
+    {
+        //Emulate a target element criteria by splitting it manually in the needed criterias
+        if (isset($criteria['target']) && $criteria['target'] instanceof DBElement) {
+            $element = $criteria['target'];
+            $criteria['target_id'] = $element;
+            $criteria['target_type'] = AbstractLogEntry::targetTypeClassToID(get_class($element));
+            unset($criteria['target']);
+        }
+
+        return parent::findBy($criteria, $orderBy, $limit, $offset); // TODO: Change the autogenerated stub
+    }
+
+    /**
+     * Find log entries associated with the given element (the history of the element)
+     * @param  DBElement  $element The element for which the history should be generated
+     * @param  string  $order By default newest entries are shown first. Change this to ASC to show oldest entries first.
+     * @param  null  $limit
+     * @param  null  $offset
+     * @return AbstractLogEntry[]
+     */
+    public function getElementHistory(DBElement $element, $order = 'DESC', $limit = null, $offset = null)
+    {
+        return $this->findBy(['element' => $element], ['timestamp' => $order], $limit, $offset);
+    }
+
+    /**
+     * Gets the target element associated with the logentry.
+     * @param AbstractLogEntry $logEntry
+     * @return DBElement|null Returns the associated DBElement or null if the log either has no target or the element
+     * was deleted from DB.
+     */
+    public function getTargetElement(AbstractLogEntry $logEntry): ?DBElement
+    {
+        $class = $logEntry->getTargetClass();
+        $id = $logEntry->getTargetID();
+
+        if ($class === null || $id === null) {
+            return null;
+        }
+
+        return $this->getEntityManager()->find($class, $id);
+    }
+}