Implement maintenance

src/middleware/maintenance.global.ts

@@ -0,0 +1,23 @@
+export default defineNuxtRouteMiddleware(async (to) => {
+  let isMaintenance = ref<Boolean>(true)
+  const { $trpc } = useNuxtApp()
+
+  try {
+    isMaintenance.value = await $trpc.maintenance.is.query()
+  } catch (error) {
+    return navigateTo('/maintenance')
+  }
+
+  if (isMaintenance.value && to.path !== '/maintenance') {
+    return navigateTo('/maintenance', {
+      redirectCode: 301,
+    })
+  }
+
+  if (!isMaintenance.value && to.path === '/maintenance') {
+    return navigateTo('/', {
+      redirectCode: 301,
+      replace: true,
+    })
+  }
+})