feat(imports): Add minimal stubs useAuth and useAuthState imports

WHne nuxt-auth module is disabled all #auth imports were failing. For mocking and testing this presented a situation which was impossible to handle properly. This commit adds a stub for these imports on the client side when the module is disabled, opening a way to mock the modules properly.

src/module.ts

@@ -129,7 +129,6 @@ export default defineNuxtModule<ModuleOptions>({
     // 1. Check if module should be enabled at all
     if (!options.isEnabled) {
       logger.info(`Skipping ${PACKAGE_NAME} setup, as module is disabled`)
-      return
     }
 
     logger.info('`nuxt-auth` setup starting')
@@ -154,18 +153,32 @@ export default defineNuxtModule<ModuleOptions>({
     const { resolve } = createResolver(import.meta.url)
 
     // 4. Add the correct nuxt-auth app composable, for the desired backend
-    addImports([
-      {
-        name: 'useAuth',
-        from: resolve(`./runtime/composables/${options.provider.type}/useAuth`)
-      },
-      {
-        name: 'useAuthState',
-        from: resolve(
-          `./runtime/composables/${options.provider.type}/useAuthState`
-        )
-      }
-    ])
+    if (options.isEnabled) {
+      addImports([
+        {
+          name: 'useAuth',
+          from: resolve(`./runtime/composables/${options.provider.type}/useAuth`)
+        },
+        {
+          name: 'useAuthState',
+          from: resolve(
+            `./runtime/composables/${options.provider.type}/useAuthState`
+          )
+        }
+      ])
+    } else {
+      // In case nuxt-auth is disabled, we add stubs for the imports
+      addImports([
+        {
+          name: 'useAuth',
+          from: resolve('./runtime/composables/stub/useAuth')
+        },
+        {
+          name: 'useAuthState',
+          from: resolve('./runtime/composables/stub/useAuthState')
+        }
+      ])
+    }
 
     // 5. Create virtual imports for server-side
     nuxt.hook('nitro:config', (nitroConfig) => {

src/runtime/composables/stub/useAuth.ts

@@ -0,0 +1,47 @@
+import { ref, readonly } from 'vue'
+import {
+  CommonUseAuthStateReturn,
+  SignOutFunc,
+  SignInFunc,
+  // SessionStatus,
+  GetSessionFunc
+} from '../../types'
+import { useAuthState } from './useAuthState'
+
+export const useAuth = (): CommonUseAuthStateReturn<null> => {
+  const {
+    data,
+    status,
+    lastRefreshedAt
+  } = useAuthState()
+
+  const getters = {
+    status,
+    data: readonly(data),
+    lastRefreshedAt: readonly(lastRefreshedAt),
+    loading: ref(false),
+    refresh: () => null,
+    _internal: {
+      baseURL: ''
+    }
+  }
+
+  const getSession:GetSessionFunc<any> = async (_) => {
+    return await data.value
+  }
+  const signIn:SignInFunc<unknown, any> = async (_) => {}
+  const signOut:SignOutFunc = async () => {}
+
+  const actions = {
+    getSession,
+    signIn,
+    signOut,
+    getProviders: () => [],
+    getCsrfToken: () => ''
+  }
+
+  return {
+    ...getters,
+    ...actions
+  }
+}

src/runtime/composables/stub/useAuthState.ts

@@ -0,0 +1,15 @@
+import { ref, readonly } from 'vue'
+import { CommonUseAuthStateReturn } from '../../types'
+import { makeCommonAuthState } from '../commonAuthState'
+
+export const useAuthState = (): CommonUseAuthStateReturn<null> & {
+    token: ReturnType<typeof ref>
+    refreshToken: ReturnType<typeof ref>
+} => {
+  return {
+    ...makeCommonAuthState<null>(),
+    token: readonly(ref('')),
+    refreshToken: readonly(ref(''))
+  }
+}
+export default useAuthState