Add load balancer (#453)

app/Actions/Site/UpdateLoadBalancer.php

@@ -0,0 +1,63 @@
+<?php
+
+namespace App\Actions\Site;
+
+use App\Enums\LoadBalancerMethod;
+use App\Models\LoadBalancerServer;
+use App\Models\Site;
+use Illuminate\Validation\Rule;
+
+class UpdateLoadBalancer
+{
+    public function update(Site $site, array $input): void
+    {
+        $site->loadBalancerServers()->delete();
+
+        foreach ($input['servers'] as $server) {
+            $loadBalancerServer = new LoadBalancerServer([
+                'load_balancer_id' => $site->id,
+                'ip' => $server['server'],
+                'port' => $server['port'],
+                'weight' => $server['weight'],
+                'backup' => (bool) $server['backup'],
+            ]);
+            $loadBalancerServer->save();
+        }
+
+        $site->webserver()->updateVHost($site);
+    }
+
+    public static function rules(Site $site): array
+    {
+        return [
+            'servers' => [
+                'required',
+                'array',
+            ],
+            'servers.*.server' => [
+                'required',
+                Rule::exists('servers', 'local_ip')
+                    ->where('project_id', $site->project->id),
+            ],
+            'servers.*.port' => [
+                'required',
+                'numeric',
+                'min:1',
+                'max:65535',
+            ],
+            'servers.*.weight' => [
+                'nullable',
+                'numeric',
+                'min:0',
+            ],
+            'servers.*.backup' => [
+                'required',
+                'boolean',
+            ],
+            'method' => [
+                'required',
+                Rule::in(LoadBalancerMethod::all()),
+            ],
+        ];
+    }
+}