const webpackDev = require('webpack-dev-middleware');

function applyMiddleware(middleware, req, res) {

    const _send = res.send;

    return new Promise((resolve, reject) => {

      try {

        res.send = function () {

          _send.apply(res, arguments) && resolve(false);

        };

        middleware(req, res, resolve.bind(null, true));

      } catch (error) {

        reject(error);

      }

    });

  }

module.exports = ({compiler, others}) => {

    const middleware = webpackDev(compiler, others);

    return async (ctx, next) => {

        const hasNext = await applyMiddleware(middleware, ctx.req, Object.assign(ctx.res, {

            send: content => {return ctx.body = content}

        }))

        if(hasNext){

            await next();

        }

    }

}