Add MPLS Support (#10263)

* WIP - Add MPLS Support
This introduce the generic MPLS support
- New database tables for MPLS LSPs
- actually discovery and polling on NOKIA SR OS (Timetra) devices
- new routing->MPLS HTML pages

- ToDo MPLS LSP paths table and views
Suggestions and improvements are welcome

* add db schema

* some fixes

* add path table, discovery and polling

* add path views

* add test data

* Convert MPLS module to new style
Implement a SyncsModels trait to simplify code a lot

* abs() for negative value from snmp (bug?), test data

* fix db schema

* Fix up test data, remove uneeded data in json

* fix whitespace

LibreNMS/DB/SyncsModels.php

@@ -0,0 +1,60 @@
+<?php
+/**
+ * SyncsModels.php
+ *
+ * -Description-
+ *
+ * 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 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ * @package    LibreNMS
+ * @link       http://librenms.org
+ * @copyright  2019 Tony Murray
+ * @author     Tony Murray <murraytony@gmail.com>
+ */
+
+namespace LibreNMS\DB;
+
+trait SyncsModels
+{
+    /**
+     * Sync several models for a device's relationship
+     * Model must implement \LibreNMS\Interfaces\Models\Keyable interface
+     *
+     * @param \App\Models\Device $device
+     * @param string $relationship
+     * @param \Illuminate\Support\Collection $models
+     * @return \Illuminate\Support\Collection
+     */
+    protected function syncModels($device, $relationship, $models)
+    {
+        $models = $models->keyBy->getCompositeKey();
+        $existing = $device->$relationship->keyBy->getCompositeKey();
+
+        foreach ($existing as $key => $existing_lsp) {
+            if ($models->offsetExists($key)) {
+                // update
+                $existing_lsp->fill($models->get($key)->getAttributes())->save();
+            } else {
+                // delete
+                $existing_lsp->delete();
+                $existing->forget($key);
+            }
+        }
+
+        $new = $models->diffKeys($existing);
+        $device->$relationship()->saveMany($new);
+
+        return $existing->merge($new);
+    }
+}