Add interface to additional roles/permissions

app/Database/migrations/2017_06_08_0001_roles_permissions_tables.php

@@ -74,11 +74,6 @@ class RolesPermissionsTables extends Migration
                 'name'         => 'admin',
                 'display_name' => 'Administrators',
             ],
-            [
-                'id'           => 2,
-                'name'         => 'user',
-                'display_name' => 'Pilot',
-            ],
         ];
 
         $this->addData('roles', $roles);

app/Database/migrations/2019_06_19_220910_add_readonly_to_roles.php

@@ -0,0 +1,37 @@
+<?php
+
+use Illuminate\Support\Facades\Schema;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Database\Migrations\Migration;
+
+class AddReadonlyToRoles extends Migration
+{
+    /**
+     * Run the migrations.
+     *
+     * @return void
+     */
+    public function up(): void
+    {
+        Schema::table('roles', static function (Blueprint $table) {
+            $table->boolean('read_only');
+        });
+
+        // Set the two main roles as read-only
+        DB::table('roles')
+            ->whereIn('name', ['admin', 'user'])
+            ->update(['read_only' => true]);
+    }
+
+    /**
+     * Reverse the migrations.
+     *
+     * @return void
+     */
+    public function down(): void
+    {
+        Schema::table('roles', static function (Blueprint $table) {
+            $table->dropColumn('read_only');
+        });
+    }
+}