blank/src/server/api/base.ts

import { createRoute, OpenAPIHono } from '@hono/zod-openapi'
import { z } from 'zod'

const app = new OpenAPIHono()

const QuerySchema = z.object({
  name: z.string().optional().openapi({
    param: {
      name: 'name',
      in: 'query'
    },
    example: 'John'
  })
})

const ResponseSchema = z.object({
  message: z.string().openapi({
    example: 'Hello from API, John'
  })
})

const route = createRoute({
  method: 'get',
  path: '/',
  request: {
    query: QuerySchema
  },
  responses: {
    200: {
      content: {
        'application/json': {
          schema: ResponseSchema
        }
      },
      description: 'Successful response'
    },
    400: {
      description: 'Invalid request'
    }
  }
})

app.openapi(route, (c) => {
  const { name } = c.req.valid('query')
  return c.json({ message: `Hello from API${name ? `, ${name}` : ''}` })
})

export default app
export type BaseAppType = typeof app