pmcelhaney / counterfact / 9310610020

import { pathToFileURL } from "node:url";

import createDebug from "debug";

import Koa from "koa";

import bodyParser from "koa-bodyparser";

import { koaSwagger } from "koa2-swagger-ui";

import type { Config } from "./config.js";

import { openapiMiddleware } from "./openapi-middleware.js";

import { pageMiddleware } from "./page-middleware.js";

import type { Registry } from "./registry.js";

const debug = createDebug("counterfact:server:create-koa-app");

// eslint-disable-next-line max-statements

export function createKoaApp(

  registry: Registry,

  koaMiddleware: Koa.Middleware,

  config: Config,

) {

  const app = new Koa();

  app.use(

    openapiMiddleware(

      config.openApiPath,

      `//localhost:${config.port}${config.routePrefix}`,

    ),

  );

  app.use(

    koaSwagger({

      routePrefix: "/counterfact/swagger",

      swaggerOptions: {

        url: "/counterfact/openapi",

      },

    }),

  );

  debug("basePath: %s", config.basePath);

  debug("routes", registry.routes);

  app.use(

    pageMiddleware("/counterfact/", "index", {

      basePath: config.basePath,

      methods: ["get", "post", "put", "delete", "patch"],

      openApiHref: config.openApiPath.includes("://")

        ? config.openApiPath

        : pathToFileURL(config.openApiPath).href,

      openApiPath: config.openApiPath,

      get routes() {

        return registry.routes;

      },

    }),

  );

  app.use(async (ctx, next) => {

    if (ctx.URL.pathname === "/counterfact") {

      ctx.redirect("/counterfact/");

      return;

    }

    // eslint-disable-next-line  n/callback-return

    await next();

  });

  app.use(

    pageMiddleware("/counterfact/rapidoc", "rapi-doc", {

      basePath: config.basePath,

      get routes() {

        return registry.routes;

      },

    }),

  );

  app.use(bodyParser());

  app.use(koaMiddleware);

  return app;

}