feat: generate middleware types

packages/bridge-schema/src/config/index.ts

@@ -1,4 +1,3 @@
-
 import app from './app'
 import build from './build'
 import cli from './cli'

packages/bridge/src/app.ts

@@ -2,7 +2,7 @@ import { useNuxt, addTemplate, resolveAlias, addWebpackPlugin, addVitePlugin, ad
 import { NuxtModule } from '@nuxt/schema'
 import { normalize, resolve } from 'pathe'
 import { resolveImports } from 'mlly'
-import { componentsTypeTemplate, schemaTemplate } from './type-templates'
+import { componentsTypeTemplate, schemaTemplate, middlewareTypeTemplate } from './type-templates'
 import { distDir } from './dirs'
 import { VueCompat } from './vue-compat'
 
@@ -57,8 +57,12 @@ export async function setupAppBridge (_options: any) {
     ...componentsTypeTemplate,
     options: { components, buildDir: nuxt.options.buildDir }
   })
+
+  addTemplate(middlewareTypeTemplate)
+
   nuxt.hook('prepare:types', ({ references }) => {
     references.push({ path: resolve(nuxt.options.buildDir, 'types/components.d.ts') })
+    references.push({ path: resolve(nuxt.options.buildDir, 'types/middleware.d.ts') })
   })
 
   // Augment schema with module types

packages/bridge/src/runtime/app.ts

@@ -1,4 +1,3 @@
-
 import type { NuxtAppCompat } from '@nuxt/bridge-schema'
 import { defineComponent, getCurrentInstance } from './composables'
 export const isVue2 = true

packages/bridge/src/type-templates.ts

@@ -1,4 +1,3 @@
-
 import { isAbsolute, relative, join } from 'pathe'
 import type { Component, Nuxt, NuxtApp } from '@nuxt/schema'
 import { genDynamicImport, genString } from 'knitwork'
@@ -10,6 +9,11 @@ type ComponentsTemplateOptions = {
   components: Component[]
 }
 
+interface TemplateContext {
+  nuxt: Nuxt
+  app: NuxtApp & { templateVars: Record<string, any> }
+}
+
 export const componentsTypeTemplate = {
   filename: 'types/components.d.ts',
   getContents: ({ options }: { options: ComponentsTemplateOptions }) => {
@@ -28,9 +32,22 @@ export const componentNames: string[]
   }
 }
 
-interface TemplateContext {
-  nuxt: Nuxt
-  app: NuxtApp
+export const middlewareTypeTemplate = {
+  filename: 'types/middleware.d.ts',
+  getContents: ({ app }: TemplateContext) => {
+    const middleware = app.templateVars.middleware
+
+    return [
+      'import type { NuxtAppCompat } from \'@nuxt/bridge-schema\'',
+      `export type MiddlewareKey = ${middleware.map(mw => genString(mw.name)).join(' | ') || 'string'}`,
+      'declare module \'vue/types/options\' {',
+      '  export type Middleware = MiddlewareKey | ((ctx: NuxtAppCompat, cb: Function) => Promise<void> | void)',
+      '  interface ComponentOptions<V extends Vue> {',
+      '    middleware?: Middleware | Middleware[]',
+      '  }',
+      '}'
+    ].join('\n')
+  }
 }
 
 const adHocModules = ['router', 'pages', 'auto-imports', 'meta', 'components']