Grails mail plugin: implementing email validation (part 2)

Continuing the 1st part of email validation.

In my urlmappings the default controller is user:

//"/"(view:"/index")

"/"(controller:"user", action:"index")

Inside the UserController :

def index() {

if(params.id){

Map model = [queueId: params.id]

redirect(controller:'queue', action:'view', params:model)

}

if(params.confirmationCode){

print "email confirmation code: '${params.confirmationCode}'"

Map params = [confirmationCode: params.confirmationCode]

redirect(controller:'user', action:'confirmEmail', params: params)

}

}

When user opens the link from email like www.yourapp.com/?confirmationCode=32irm4oifjij then the flow passes to the confirmEmail action

confirmEmail action:

def confirmEmail(){

def confirmationCode = params.confirmationCode

def decoded = new String(params.confirmationCode.decodeBase64())

def separatorIndex = decoded.indexOf("QQQ")

def userId = decoded.substring(0, separatorIndex).toInteger()

def user = User.findById(userId)

def proceed = true

if(!user){

proceed = false

flash.message = "User not found with such id."

}

if(confirmationCode != user.temp){

proceed = false

flash.message = "Wrong confirmation code!"

}

if(proceed){

user.temp = null

user.emailVerified = true

user.save(flush:true)

flash.message = "Email was successfully verified for user '${user.userName}'."

}

redirect(controller:'user', action:'index')

}

This is a string decoded in base64 format. For my application queit the format was next: [user id]QQQ[confirmation code]

So the decoded string would look like "1QQQ#@FR$G#ESD", while the encoded string looks something like "ferGW$GFHWgweroih6"

The id is used to fetch user from DB. The user table has a "temp" field where i stored the confirmation code when registering and then sending email.

I believe the rest is self explanatory.