javascript - Show inline field validation errors along with email sent message to an end user filling up a form -

i'm working on app being developed on nodejs, expressjs, mongoose stack. i'm building form on submission of if there validation errors[ want use mongoose validation, keep validation code @ 1 place] re-render these error messages form , if fields valid send email end user if email not available in mongoose.

so form usual form except i'm doing rendering form expressjs , want enduser should info there field errors send email , notify end user @ same time email in process of being sent, , if email exists notify user instantly on form.

some psuedocode can me think in nodejs way appreciated. i'm coming python/django stack.

below email sender module returns promise object.

mailer.js

var path           = require('path') , templatesdir   = path.resolve(__dirname, '..', 'email_templates') , emailtemplates = require('email-templates') , nodemailer     = require('nodemailer') , rsvp           = require('rsvp') ;  var sendemail = function (template_name, locals) { return new rsvp.promise(function(resolve,reject){     emailtemplates(templatesdir, function(err, template) {       if (err) {         return reject({error: err})       } else {          emailfrom = 'an_email_address',          mailer = {             host: 'some_amazon_instance',             port: 25,             service: 'smtp', // gmail, smtp, zoho             auth: {                 user: 'credential',                 pass: 'credential'             }         };          var transport = nodemailer.createtransport("smtp", mailer);         var emailto = emailfrom;         if (!locals.admin) {           emailto = locals.email;         }          // send single email         template(template_name, locals, function(err, html, text) {           if (err) {           } else {             transport.sendmail({               from: emailfrom,               to: emailto,               subject: locals.title,               html: html,               text: text             }, function(err, responsestatus) {               if (err) {                 transport.close();                 return reject({error: err});               } else {                 resolve({result: responsestatus.message});               }               transport.close();             });           }         });       }     }); }); }  exports.sendemail = sendemail; 

below mongoose model handle form data, validation , email sending.

invite.js

'use strict';  /**  * module dependencies.  */ var mongoose = require('mongoose')    , schema = mongoose.schema    , sendemail = require('meanio').loadconfig().sendemail    , rsvp   = require('rsvp')    ;  var studioinviteschema = new schema({ name: {     type: string, required: [true, 'name required'] }, email: {     type: string,     index: true,      unique: true,     required: [true, 'email required'] }, phone: {     type: number,     index: true,      unique: true,      required: [true, 'phone required'] }, address: {     type: string, required: [true, 'address required'] }, email_template: {type: string, required: true}, title: {type: string, require: true} });  studioinviteschema.path('phone').validate(function (value) {  return parseint(value)!=nan && value.tostring().length == 10; }, 'enter valid phone number');   studioinviteschema.path('email').validate(function (value) {   var re = /^(([^<>()[\]\\.,;:\s@\"]+(\.[^<>()[\]\\.,;:\s@\"]+)*)|    (\".+\"))@((\[[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\.[0-9]{1,3}\])|(([a-za-z\-0-9]+\.)+[a-za-z]{2,}))$/;  return re.test(value) }, 'enter valid email');  studioinviteschema.methods = { saveandemailtoadmin: function () {     var instance = this;     console.log(instance, this, 42);     return new rsvp.promise(function (resolve, reject) {          instance.save(function (err) {             if (err) {                 if (err.code == 11000) {                     return reject({message: 'duplicate invite'})                 }                 return reject({message: err})             }              var admin_email_context = {                 name: instance.name,                 email: instance.email,                 phone: instance.phone,                 address: instance.address,                 title: instance.title,                 admin: true             }              var studio_email_context = {                 name: instance.name,                 message: "we'll contact shortly",                 email: instance.email,                 title: 'invite received',                 admin: false             }              var admin_email = sendemail(instance.email_template, admin_email_context)             var studio_email = sendemail('userinvite', studio_email_context)              rsvp.allsettled([admin_email, studio_email])                 .then(function (array) {                     console.log(array)                     resolve({message: 'success'})                 }, function (error) {                     resolve({message: 'error'})                 })          })     }); } };  mongoose.model('studioinvite', studioinviteschema); 

and below controller of html view invoke saveandemailtoadmin of invite.js model form validation , email sending.

invite_controller.js

exports.studioinvite = function (req, res) {   var invite = new studioinvite({ name: req.body.name, email: req.body.email, phone: req.body.phone, address: req.body.address, email_template: 'studioinvite', title: 'invite request studio'   });    /*   todo: have use notifications send messages end users invite sent or there duplicacy   */   invite.saveandemailtoadmin()     .then(function (result) {   console.log(result)   return [ send success messages ] }, function (error) {   console.log(error);   return [ send error messages] });  return [ dont want return @ line if email sending takes time have return response ]  } 

i've found can use blocking code means i've put user on hold untill done on server, can use socket.io send realtime notifications end users validation messages , email sent notifications. solution doesn't seem me.