Growl-style Notifications with Lift's CometActors

NotificationCenter.scala

object NotificationCenter extends LiftActor with ListenerManager {

    def createUpdate = "dummy"

    override def lowPriority = {
        case s: NotificationMessage => updateListeners(s)
    }

}

NotificationMessage.scala

case class NotificationMessage(title: String, text: String, image: Box[String], sticky: Boolean, time: Box[Int], customer: Box[Long]) {

    def toJsCmd = JsRaw("""
        $.gritter.add({
            // (string | mandatory) the heading of the notification
            title: "%s",
            // (string | mandatory) the text inside the notification
            text: "%s",
            // (string | optional) the image to display on the left
            image: "%s",
            // (bool | optional) if you want it to fade out on its own or just sit there
            sticky: %s,
            // (int | optional) the time you want it to be alive for before fading out
            time: %s,
            // (string | optional) the class name you want to apply to that specific message
            class_name: 'sticky'
        })
    """.format(
        title.replaceAll("\"", "\\\""),
        text.replaceAll("\"", "\\\""),
        image match { case Full(a) => a case _ => "" },
        sticky,
        time match { case Full(a) => a case _ => "''" }))

}

send.html

<span lift="SendNotification">
        <h3><lift:loc locid="new.notification">New Notification</lift:loc></h3>
        <label><lift:loc locid="title">Title</lift:loc>:</label>
        <input class="notification_title"/><br/>

        <label><lift:loc locid="text">Text</lift:loc>:</label>
        <input class="notification_text"/><br/>

        <label><lift:loc locid="sticky">Sticky?</lift:loc>:</label>
        <input class="notification_sticky"/><br/>

        <label><lift:loc locid="Customer">Customer</lift:loc>:</label>
        <input class="notification_customer" placeholder="e.g. 10100"/><br/>

        <button class="notification_send"></button>
</span> 

SendNotification.scala

class SendNotification extends StatefulSnippet {

    def dispatch = {
        case "render" => render
    }

    var title = "Admin Message"
    var text = ""
    var customer = ""
    var sticky = false

    def notification = NotificationMessage(
        title,
        text.replaceAll("\r?\n", "<br/>"),
        Full("http://uberblo.gs/me.png"),
        sticky,
        Empty,
        if (customer == "") Empty else Full(customer.toLong))

    def render: CssSel =
        ".notification_title" #> SHtml.ajaxText(title, (v: String) => { title = v; Noop }) &
        ".notification_text" #> SHtml.ajaxTextarea(text, (v: String) => { text = v; Noop }) &
        ".notification_sticky" #> SHtml.ajaxCheckbox(sticky, (v: Boolean) => { sticky = v; Noop }) &
        ".notification_customer" #> SHtml.ajaxText(customer, (v: String) => { customer = v; Noop }) &
        ".notification_send" #> SHtml.ajaxButton("Send Notification", () => { NotificationCenter ! notification; Noop })

}

template.html

<span lift="Users.isLoggedIn">
        <span lift="comet?type=UserNotification"></span>
</span>

UserNotification.scala

class UserNotification extends CometActor with CometListener {

    def registerWith = NotificationCenter

    private var msgs: List[NotificationMessage] = List()

    override def lowPriority = {
        case v: NotificationMessage => v.customer match {
            case Full(c) if User.currentUser != Empty => if (c == User.currentUser.open_!.customer.is) submit(v)
            case Full(c) if User.currentUser == Empty =>
            case Empty => submit(v)
            case _ =>
        }
    }

    private def submit(v: NotificationMessage) {
        v :: msgs
        partialUpdate(v.toJsCmd)
    }

    def render = "*" #> ""

}