feat: new @scalar/mock-server package

[hanspagel]

This PR separates the mock server from the CLI. I’m not sure whether this will be something we’ll really provide to the users, but definitely something we’ll need in other places. That’s why I didn’t bother to make the API too simple.

Here is a small example with the current approach:

import { serve } from '@hono/node-server'
import { createMockServer } from '@scalar/mock-server'

// Your OpenAPI specification
const openapi = {
  openapi: '3.1.0',
  info: {
    title: 'Hello World',
    version: '1.0.0',
  },
  paths: {
    '/foobar': {
      get: {
        responses: {
          '200': {
            description: 'OK',
            content: {
              'application/json': {
                example: {
                  foo: 'bar',
                },
              },
            },
          },
        },
      },
    },
  },
}

// Create the mocked routes
const app = await createMockServer({
  openapi,
  onRequest({ context, operation }) {
    console.log(context.req.method, context.req.path)
  },
})

// Start the server
serve({
  fetch: app.fetch,
  port: 3000,
}, (info) => {
  console.log(`Listening on http://localhost:${info.port}`)
})

[marclave]

🔥