import { assert, presence, email } from 'property-validator';

let user = {
  username: 'nettofarah',
  email_address: 'invalid@email'
}

assert(user, [
  presence('username'),
  email('email_address')
]);

// will throw a ValidationError

// /Users/netto/projects/property-validator/lib/request_assertions.js:8
//    throw new ValidationError(validation);

import { validate, presence, email } from 'property-validator';

let user = {
  username: 'nettofarah',
  email_address: 'invalid@email'
}

validate(user, [
  presence('username'),
  email('email_address')
]);

// returns
{
  valid: false,
  errors :[
    {
      field: "email_address",
      message: "\"email_address\" should look like an email address"
    }
  ],
  messages: [
    "\"email_address\" should look like an email address"
  ]
}

import express from 'express';
import { assertAll, presence, email, assertMiddleware } from 'property-validator';

const app = express();

app.get('/hello', function(req, res){
  assertAll(req, [
    presence('username'),
    email('email_address')
  ]);

  res.status(200).json({ name: req.query.username });
});

app.use(assertMiddleware);

import { validateParams, presence } from 'property-validator';

app.get('/hello/:username', function(req, res){
  const validation = validateParams(req, [
    presence('username')
  ]);

  if (validation.valid) {
    res.status(200).json({ name: req.query.username });
  } else {
    res.status(422).json({ errors: validation.errors });
  }
});

import { assertParams, presence } from 'property-validator';

app.get('/hello/:username', function(req, res){
  assertParams(req, [
    presence('username')
  ]);

  // No need to check the validation result
  res.status(200).json({ name: req.query.username });
});

import { validateQuery, email } from 'property-validator';

app.get('/hi', function(req, res){
  const validation = validateQuery(req, [
    email('primary_email_address')
  ]);

  if (validation.valid) {
    res.status(200).send('We promise not to send spam!');
  } else {
    res.status(422).json({ errors: validation.errors });
  }
});

import { assertQuery, email } from 'property-validator';

app.get('/hi', function(req, res){
  assertQuery(req, [
    email('primary_email_address')
  ]);

  // No need to check the validation result
  res.status(200).send('We promise not to send spam!');
});

import { validateBody, presence, email } from 'property-validator';

app.post('/sign-up', function(req, res){
  const validation = validateBody(req, [
    email('user.email'),
    presence('user.password'),
    presence('user.password_confirmation')
  ]);

  if (validation.valid) {
    res.status(200).send('Welcome!');
  } else {
    res.status(422).send({ errors: validation.errors });
  }
});

import { assertBody, presence, email } from 'property-validator';

app.post('/sign-up', function(req, res){
  assertBody(req, [
    email('user.email'),
    presence('user.password'),
    presence('user.password_confirmation')
  ]);

  // No need to check the validation result
  res.status(200).send('Welcome!');
});

import { validateHeaders, presence, format } from 'property-validator';

app.get('/secret-stuff', function(req, res){
  const validation = validateHeaders(req, [
    presence('Authorization'),
    format('Authorization', /Token token="\w+"/)
  ]);

  if (validation.valid) {
    res.status(200).send('Here is all your secret stuff!');
  } else {
    res.status(401).send('You shall not pass!');
  }
});

import { assertHeaders, presence, format } from 'property-validator';

app.get('/secret-stuff', function(req, res){
  assertHeaders(req, [
    presence('Authorization'),
    format('Authorization', /Token token="\w+"/)
  ]);

  // No need to check the validation result
  res.status(200).send('Here is all your secret stuff!');
});

import express from 'express';
import { assertAll, presence, email, assertMiddleware } from 'property-validator';

const app = express();

app.get('/hello', function(req, res){
  assertAll(req, [
    presence('username'),
    email('email_address')
  ]);

  res.status(200).json({ name: req.query.username });
});

app.post('/bla', ...);
...

app.get('/test', ...);

app.use(assertMiddleware);

import { ValidationError } from 'property-validator';

app.use(function(err, req, res, next) {
  // Do not swallow all kinds of errors
  const isValidationError = (err instanceof ValidationError);
  if (!isValidationError) {
    return next(err);
  }

  const messages = err.messages;
  res.status(422);

  res.json({
    notice: "Your request is invalid",
    errors: messages
  })
});

var validation = validate(params, [
  optional(isNumeric('limit')),
  optional(isNumeric('offset'))
]);

var validation = validate(params, [
  presence('name', 'Oops, you forgot to tell us your name'),
  isCurrency('rent_in_brl', { symbol: 'R$' }, 'Reais should be prefixed with R$'),
  isCurrency('rent', 'This does not look like money')
]);

var validation = validate(params, [
  presence('name', 'Oops, you forgot to tell us your :paramName'),
  isLength('value', { min: 10, max: 99 }, 'The :paramName should be between :min and :max')
]);

//Oops, you forgot to tell us your name
//The value should be between 10 and 99

import { assert, presence, isLength, email, setLocals } from 'property-validator';
setLocals({
  required: 'Oops, you forgot to tell us your :paramName'
});

var validation = validate(params, [
  presence('name'),
  isLength('value', { min: 10, max: 99 }, 'The :paramName should be between :min and :max'),
  email('email')
]);

//Oops, you forgot to tell us your name
//The value should be between 10 and 99
//"email" should look like an email address

import { restoreDefaultLocals } from 'property-validator';

restoreDefaultLocals();

// Your function will receive a property name as its argument
function isTheUltimateAnswer(propertyName) {
  // and then return a function that takes the
  // actual object you want to validate
  return function(subject) {
    var value = subject[propertyName]
    var isAnswer = value === 42

    // Make sure your function returns `result`, `message`
    // and `field`
    return {
      result: isAnswer,
      message: value + " is not the Answer to the Ultimate Question of Life, The Universe, and Everything",
      field: propertyName
    }
  }
}

var subject = {
  'guess': 43
}

var validation = validate(subject, [
  isTheUltimateAnswer('guess')
]);