Eventlog updates (#9633)

* Eventlog updates
remove host from eventlog table, retain in api
allow most fields nullable

* updated schema

* revert auth for legacy log_event function
safer check in the model

* add function modifiers

app/Models/Device.php

@@ -487,7 +487,7 @@ class Device extends BaseModel
 
     public function eventlogs()
     {
-        return $this->hasMany('App\Models\General\Eventlog', 'host', 'device_id');
+        return $this->hasMany('App\Models\Eventlog', 'device_id', 'device_id');
     }
 
     public function groups()

app/Models/Eventlog.php

@@ -25,11 +25,43 @@
 
 namespace App\Models;
 
+use Carbon\Carbon;
+
 class Eventlog extends BaseModel
 {
     protected $table = 'eventlog';
     protected $primaryKey = 'event_id';
     public $timestamps = false;
+    protected $fillable = ['datetime', 'message', 'type', 'reference', 'username', 'severity'];
+
+    // ---- Helper Functions ----
+
+    /**
+     * Log events to the event table
+     *
+     * @param string $text message describing the event
+     * @param Device $device related device
+     * @param string $type brief category for this event. Examples: sensor, state, stp, system, temperature, interface
+     * @param int $severity 1: ok, 2: info, 3: notice, 4: warning, 5: critical, 0: unknown
+     * @param int $reference the id of the referenced entity.  Supported types: interface
+     */
+    public static function log($text, $device = null, $type = null, $severity = 2, $reference = null)
+    {
+        $log = new static([
+            'reference' => $reference,
+            'type' => $type,
+            'datetime' => Carbon::now(),
+            'severity' => $severity,
+            'message' => $text,
+            'username'  => (class_exists('\Auth') && \Auth::check()) ? \Auth::user()->username : '',
+        ]);
+
+        if ($device instanceof Device) {
+            $device->eventlogs()->save($log);
+        } else {
+            $log->save();
+        }
+    }
 
     // ---- Query scopes ----