Middleware to generate unique ID for Firefly III installation.

app/Http/Middleware/InstallationId.php

@@ -0,0 +1,61 @@
+<?php
+/**
+ * InstallationId.php
+ * Copyright (c) 2020 james@firefly-iii.org
+ *
+ * This file is part of Firefly III (https://github.com/firefly-iii).
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero 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 Affero General Public License for more details.
+ *
+ * You should have received a copy of the GNU Affero General Public License
+ * along with this program.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+declare(strict_types=1);
+
+
+namespace FireflyIII\Http\Middleware;
+
+use Closure;
+use FireflyIII\Exceptions\FireflyException;
+use Log;
+use Ramsey\Uuid\Uuid;
+
+/**
+ *
+ * Class InstallationId
+ */
+class InstallationId
+{
+    /**
+     * Handle an incoming request.
+     *
+     * @param \Illuminate\Http\Request $request
+     * @param Closure                  $next
+     *
+     * @return mixed
+     *
+     * @throws FireflyException
+     *
+     */
+    public function handle($request, Closure $next)
+    {
+        $config = app('fireflyconfig')->get('installation_id', null);
+        if (null === $config) {
+            $uuid5    = Uuid::uuid5(Uuid::NAMESPACE_URL, 'firefly-iii.org');
+            $uniqueId = (string)$uuid5;
+            Log::info(sprintf('Created Firefly III installation ID %s', $uniqueId));
+            app('fireflyconfig')->set('installation_id', $uniqueId);
+        }
+
+        return $next($request);
+    }
+}