Implement interactive signup form

lib/actions/auth.coffee

@@ -1,5 +1,5 @@
+_ = require('lodash')
 url = require('url')
-open = require('open')
 async = require('async')
 resin = require('../resin')
 ui = require('../ui')
@@ -26,9 +26,20 @@ exports.logout = permissions.user ->
 	resin.auth.logout()
 
 exports.signup = ->
-	signupUrl = resin.settings.get('urls.signup')
-	absUrl = url.resolve(resin.settings.get('remoteUrl'), signupUrl)
-	open(absUrl)
+	async.waterfall([
+
+		(callback) ->
+			ui.widgets.register(callback)
+
+		(credentials, callback) ->
+			resin.auth.register credentials, (error, token) ->
+				return callback(error, credentials)
+
+		(credentials, callback) ->
+			credentials = _.omit(credentials, 'email')
+			resin.auth.login(credentials, callback)
+
+	], errors.handle)
 
 exports.whoami = permissions.user ->
 	resin.auth.whoami (error, username) ->

lib/app.coffee

@@ -93,12 +93,19 @@ capitano.command
 	help: '''
 		Use this command to signup for a resin.io account.
 
-		In the future, this command may display a form in the terminal and handle
-		the registration purely from the command line, but for reasons of simplicity,
-		it opens your default web browser at the web based signup form.
+		If signup is successful, you'll be logged in to your new user automatically.
+
+		TODO: We need to provide a non interactive way to use this command,
+		however it's not clear to me how to do it easily for now.
 
 		Examples:
 			$ resin signup
+			Email: me@mycompany.com
+			Username: johndoe
+			Password: ***********
+
+			$ resin whoami
+			johndoe
 	'''
 	action: actions.auth.signup
 

lib/ui/widgets/widgets.coffee

@@ -3,6 +3,30 @@ inquirer = require('inquirer')
 
 exports.table = require('./table/table')
 
+exports.register = (callback) ->
+	inquirer.prompt([
+		{
+			type: 'input'
+			name: 'email'
+			message: 'Email'
+		}
+		{
+			type: 'input'
+			name: 'username'
+			message: 'Username'
+		}
+		{
+			type: 'password'
+			name: 'password'
+			message: 'Password'
+			validate: (input) ->
+				if input.length < 8
+					return 'Password should be 8 characters long'
+
+				return true
+		}
+	], _.partial(callback, null))
+
 exports.login = (callback) ->
 	inquirer.prompt([
 		{