Added an menu to show some simple statistics.

src/Services/StatisticsHelper.php

@@ -0,0 +1,149 @@
+<?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\Services;
+
+
+use App\Entity\Attachments\Attachment;
+use App\Entity\Attachments\AttachmentType;
+use App\Entity\Devices\Device;
+use App\Entity\Parts\Category;
+use App\Entity\Parts\Footprint;
+use App\Entity\Parts\Manufacturer;
+use App\Entity\Parts\MeasurementUnit;
+use App\Entity\Parts\Part;
+use App\Entity\Parts\Storelocation;
+use App\Entity\Parts\Supplier;
+use App\Entity\PriceInformations\Currency;
+use Doctrine\ORM\EntityManagerInterface;
+use Doctrine\ORM\EntityRepository;
+
+class StatisticsHelper
+{
+    protected $em;
+    protected $part_repo;
+    protected $attachment_repo;
+
+    public function __construct(EntityManagerInterface $em)
+    {
+        $this->em = $em;
+        $this->part_repo = $this->em->getRepository(Part::class);
+        $this->attachment_repo = $this->em->getRepository(Attachment::class);
+    }
+
+    /**
+     *  Returns the count of distinct parts
+     */
+    public function getDistinctPartsCount(): int
+    {
+        return $this->part_repo->count([]);
+    }
+
+    /**
+     * Returns the summed instocked over all parts (only parts without a measurement unit)
+     * @return string
+     * @throws \Doctrine\ORM\NoResultException
+     * @throws \Doctrine\ORM\NonUniqueResultException
+     */
+    public function getPartsInstockSum(): string
+    {
+        return $this->part_repo->getPartsInstockSum();
+    }
+
+    /**
+     * Returns the number of all parts which have price informations
+     * @return int
+     * @throws \Doctrine\ORM\NoResultException
+     * @throws \Doctrine\ORM\NonUniqueResultException
+     */
+    public function getPartsCountWithPrice(): int
+    {
+        return $this->part_repo->getPartsCountWithPrice();
+    }
+
+    /**
+     * Returns the number of datastructures for the given type.
+     * @param  string  $type
+     * @return int
+     */
+    public function getDataStructuresCount(string $type): int
+    {
+        $arr = [
+            'attachment_type' => AttachmentType::class,
+            'category' => Category::class,
+            'device' => Device::class,
+            'footprint' => Footprint::class,
+            'manufacturer' => Manufacturer::class,
+            'measurement_unit' => MeasurementUnit::class,
+            'storelocation' => Storelocation::class,
+            'supplier' => Supplier::class,
+            'currency' => Currency::class,
+        ];
+
+        if (!isset($arr[$type])) {
+            throw new \InvalidArgumentException('No count for the given type available!');
+        }
+
+        /** @var EntityRepository $repo */
+        $repo = $this->em->getRepository($arr[$type]);
+        return $repo->count([]);
+    }
+
+    /**
+     * Gets the count of all attachments.
+     * @return int
+     */
+    public function getAttachmentsCount(): int
+    {
+        return $this->attachment_repo->count([]);
+    }
+
+    /**
+     * Gets the count of all private/secure attachments
+     * @return int
+     */
+    public function getPrivateAttachmentsCount(): int
+    {
+        return $this->attachment_repo->getPrivateAttachmentsCount();
+    }
+
+    /**
+     * Gets the count of all external (only containing an URL) attachments
+     * @return int
+     * @throws \Doctrine\ORM\NoResultException
+     * @throws \Doctrine\ORM\NonUniqueResultException
+     */
+    public function getExternalAttachmentsCount(): int
+    {
+        return $this->attachment_repo->getExternalAttachments();
+    }
+
+    /**
+     * Gets the count of all attachments where the user uploaded an file.
+     * @return int
+     * @throws \Doctrine\ORM\NoResultException
+     * @throws \Doctrine\ORM\NonUniqueResultException
+     */
+    public function getUserUploadedAttachmentsCount(): int
+    {
+        return $this->attachment_repo->getUserUploadedAttachments();
+    }
+}