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Lift Framework example source code file (MongoPasswordField.scala)

This example Lift Framework source code file (MongoPasswordField.scala) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" TM.

Java - Lift Framework tags/keywords

box, box, full, full, jsonobjectmeta, list, mongopasswordfield, nil, ownertype, password, password, string, string, text

The Lift Framework MongoPasswordField.scala source code

 * Copyright 2010-2011 WorldWide Conferencing, LLC
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *     http://www.apache.org/licenses/LICENSE-2.0
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * See the License for the specific language governing permissions and
 * limitations under the License.

package net.liftweb 
package mongodb 
package record 
package field 

import scala.xml.{Node, NodeSeq, Text}

import net.liftweb.common.{Box, Empty, Failure, Full}
import net.liftweb.http.S
import net.liftweb.http.js.JE._
import net.liftweb.util.{FatLazy, FieldError, Helpers, Safe}

import Helpers._

case class Password(pwd: String, salt: String) extends JsonObject[Password] {
  def meta = Password

object Password extends JsonObjectMeta[Password] {
  def apply(in: String): Password = Password(in, "")

object MongoPasswordField {
  val blankPw = "*******"

  def encrypt(s: String, salt: String) = hash("{"+s+"} salt={" + salt + "}")

class MongoPasswordField[OwnerType <: BsonRecord[OwnerType]](rec: OwnerType, minLen: Int) extends JsonObjectField[OwnerType, Password](rec, Password) {

  def this(rec: OwnerType) = {
    this(rec, 3)

  def setPassword(in: String) = set(Password(in))

  private val salt_i = FatLazy(Safe.randomString(16))

  var validatorValue: Box[Password] = valueBox

  override def set_!(in: Box[Password]): Box[Password] = {
    validatorValue = in
    in.map(p =>
      if (p.salt.length == 0) // only encrypt the password if it hasn't already been encrypted
        Password(MongoPasswordField.encrypt(p.pwd, salt_i.get), salt_i.get)

  override def validate: List[FieldError] = runValidation(validatorValue)

  private def elem = S.fmapFunc(S.SFuncHolder(this.setPassword(_))) {
    funcName => <input type="password"
      tabindex={tabIndex toString}/>}

  override def toForm: Box[NodeSeq] =
    uniqueFieldId match {
      case Full(id) => Full(elem % ("id" -> id))
      case _ => Full(elem)

  private def validatePassword(pwd: Password): List[FieldError] = pwd match {
    case null | Password("", _) | Password("*", _) | Password(MongoPasswordField.blankPw, _) =>
    case Password(pwd, _) if pwd.length < minLen =>
    case _ => Nil

  override def validations = validatePassword _ :: Nil

  override def defaultValue = Password("")

  override def asJs = valueBox.map(vb => Str(vb.pwd)) openOr Str(defaultValue.pwd)

  def isMatch(toMatch: String): Boolean =
    MongoPasswordField.encrypt(toMatch, value.salt) == value.pwd

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