renderer-usage.ts

import { Hono } from 'hono'
import { feedRenderer } from './renderer'

const app = new Hono()

app.get('/feed', feedRenderer({ baseUrl: 'https://example.com' }), (c) => c.render(items, { format: 'atom' }))

export default app

renderer.ts

import type { MiddlewareHandler } from 'hono'
import type { Feed } from './feed'
import { serveFeed } from './serve'
import type { FeedInput, ServeFeedOptions } from './types'

declare module 'hono' {
  interface ContextRenderer {
    (input: FeedInput | Feed, options?: ServeFeedOptions): Response
  }
}

export function feedRenderer(defaults: ServeFeedOptions = {}): MiddlewareHandler {
  return async (c, next) => {
    c.setRenderer((input, options) => serveFeed(c, input, { ...defaults, ...options }))
    await next()
  }
}