Koa passport.authenticate wrapper

koa-passport-auth.js

// koa-passport-authenticate.js
'use strict'

const _ = require('lodash')
const passport = require('koa-passport')

'use strict'

// Middleware wrapper for koa passport to have proper error handling on authenticate.

const _ = require('lodash')
const passport = require('koa-passport')

module.exports = function (strategyName){
    return function *(next){
        let self = this
        yield passport.authenticate(strategyName,
            function *(err,user,reason){
                if(err){
                    throw new Error(err)
                }
                _.set(self.state,`passport.${strategyName}`,{
                    user: user,
                    reason: reason
                });
                yield next
            }
        ).bind(this)(next);
    }
}

// routes.js
'use strict'

const koaPassportAuth = require('koa-passport-authenticate');

router.post('/login', koaPassportAuth('local'), function *(next){
    // You can get the results from passport's middleware from context.state
    // under this.state.passport.${yourStrategyName} - In this case, 'local'
    
    if(this.state.passport.local.user){
        this.redirect('/success');
    }else{
        this.flash.error = this.state.passport.local.reason;
        this.redirect('/login');
    }
});