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/*
* Copyright 2010 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,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package net.liftweb {
package example {
package snippet {
import _root_.net.liftweb._
import http._
import util._
import Helpers._
import js.JsCmds._
import js.jquery._
import _root_.scala.xml.{NodeSeq, Text}
case class Line(guid: String, name: String, price: Double, taxable: Boolean)
/**
* An invoice system with subtotals, tax, etc.
*/
class InvoiceWiring {
private object Info {
val invoices = ValueCell(List(newLine))
val taxRate = ValueCell(0.05d)
val subtotal = invoices.lift(_.foldLeft(0d)(_ + _.price))
val taxable = invoices.lift(_.filter(_.taxable).
foldLeft(0D)(_ + _.price))
val tax = taxRate.lift(taxable) {_ * _}
val total = subtotal.lift(tax) {_ + _}
}
def subtotal(in: NodeSeq) = WiringUI.asText(in, Info.subtotal)
def taxable(in: NodeSeq) = WiringUI.asText(in, Info.taxable)
def tax(in: NodeSeq) = WiringUI.asText(in, Info.tax, JqWiringSupport.fade)
def total(in: NodeSeq) = WiringUI.asText(in, Info.total, JqWiringSupport.fade)
def taxRate = SHtml.ajaxText(Info.taxRate.get.toString,
s => {
Helpers.asDouble(s).foreach {
Info.taxRate.set
}
Noop
})
def showLines = "* *" #> (Info.invoices.get.flatMap(renderLine): NodeSeq)
def addLine(ns: NodeSeq): NodeSeq = {
val div = S.attr("div") openOr "where"
SHtml.ajaxButton(ns, () => {
val theLine = appendLine
val guid = theLine.guid
JqJsCmds.AppendHtml(div, renderLine(theLine))
})
}
private def renderLine(theLine: Line): NodeSeq =
<div id={theLine.guid}>{
SHtml.ajaxText(theLine.name,
s => {
mutateLine(theLine.guid) {
l => Line(l.guid, s, l.price, l.taxable)
}
Noop
})
}
{
SHtml.ajaxText(theLine.price.toString,
s => {
Helpers.asDouble(s).foreach {
d =>
mutateLine(theLine.guid) {
l => Line(l.guid, l.name, d, l.taxable)
}
}
Noop
})
}
{
SHtml.ajaxCheckbox(theLine.taxable,
b => {
mutateLine(theLine.guid) {
l => Line(l.guid, l.name, l.price, b)
}
Noop
})
}
</div>
private def newLine = Line(nextFuncName, "", 0, false)
private def appendLine: Line = {
val ret = newLine
Info.invoices.set(ret :: Info.invoices.get)
ret
}
private def mutateLine(guid: String)(f: Line => Line) {
val all = Info.invoices.get
val head = all.filter(_.guid == guid).map(f)
val rest = all.filter(_.guid != guid)
Info.invoices.set(head ::: rest)
}
}
}
}
}
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