feat: basic admin interface

server/api/admin/instance.put.ts

@@ -0,0 +1,43 @@
+import * as z from 'zod';
+import { INSTANCE_SETTINGS_ID, REGISTRATION_MODES, instanceSettings } from '~~/drizzle/schema';
+import { db } from '~~/server/lib/db';
+
+export default defineEventHandler(async (event) => {
+    await protectAdminRoute(event);
+
+    const result = await readValidatedBody(event, (body) =>
+        z
+            .object({
+                registration: z.enum(REGISTRATION_MODES),
+            })
+            .safeParse(body),
+    );
+
+    if (!result.success) {
+        throw createError({
+            statusCode: 400,
+            message: result.error.issues[0]!.message,
+        });
+    }
+
+    if (isRegistrationLocked()) {
+        throw createError({
+            statusCode: 409,
+            statusMessage: 'Registration is locked by the environment',
+            data: {
+                code: 'REGISTRATION_LOCKED',
+            },
+        });
+    }
+
+    const { registration } = result.data;
+
+    await db.insert(instanceSettings)
+        .values({ id: INSTANCE_SETTINGS_ID, registration })
+        .onConflictDoUpdate({
+            target: instanceSettings.id,
+            set: { registration, updatedAt: new Date() },
+        });
+
+    return { registration, registrationLocked: false };
+});