Refactor more old code and get tests to pass

src/Database/Concerns/ResourceSyncing.php

@@ -0,0 +1,34 @@
+<?php
+
+namespace Stancl\Tenancy\Database\Concerns;
+
+use Stancl\Tenancy\Contracts\Syncable;
+use Stancl\Tenancy\Contracts\UniqueIdentifierGenerator;
+use Stancl\Tenancy\Events\SyncedResourceSaved;
+
+trait ResourceSyncing
+{
+    public static function bootResourceSyncing()
+    {
+        static::saved(function (Syncable $model) {
+            /** @var ResourceSyncing $model */
+
+            $model->triggerSyncEvent();
+        });
+
+        static::creating(function (self $model) {
+            if (! $model->getAttribute($model->getGlobalIdentifierKeyName()) && app()->bound(UniqueIdentifierGenerator::class)) {
+                $model->setAttribute(
+                    $model->getGlobalIdentifierKeyName(),
+                    app(UniqueIdentifierGenerator::class)->generate($model)
+                );
+            }
+        });
+    }
+
+    public function triggerSyncEvent()
+    {
+        /** @var Syncable $this */
+        event(new SyncedResourceSaved($this, tenant()));
+    }
+}