Don't know if this will be useful to anyone else, but I wanted my
error/warning/notice messages to replace a default bit of text (a
tagline). After some fiddling, I came up with this, which works quite
nicely. (Feel free to suggest improvements.)
(Note: I removed some other code I didn't need and this is my own
version, hence "Messages.")
class Messages {
def render(styles: NodeSeq): NodeSeq = {
val f = noIdMessages _
val msgs = List((f(S.errors),
(styles \\ "error_msg"), S.??("msg.error"),
((styles \\ "error_class") ++
(styles \\ "error_msg" \\ "@class")), 0),
(f(S.warnings),
(styles \\ "warning_msg"), S.??("msg.warning"),
((styles \\ "warning_class")++
(styles \\ "warning_msg" \\ "@class")), 1),
(f(S.notices),
(styles \\ "notice_msg"), S.??("msg.notice"),
((styles \\ "notice_class")) ++
(styles \\ "notice_msg" \\ "@class"), 2)).flatMap
{
case (msg, titleList, defaultTitle, styleList, ord) =>
val title: String = titleList.toList. filter(_.prefix ==
"lift"). map(_.text.trim).filter(_.length > 0) headOr defaultTitle
val styles = styleList.toList.map(_.text.trim)
if (!styles.isEmpty) {
ord match {
case 0 => MsgsErrorMeta(Full(AjaxMessageMeta(Full(title),
Full(styles.mkString(" ")))))
case 1 => MsgsWarningMeta(Full(AjaxMessageMeta(Full(title),
Full(styles.mkString(" ")))))
case 2 => MsgsNoticeMeta(Full(AjaxMessageMeta(Full(title),
Full(styles.mkString(" ")))))
}
}
msg.toList.map(e => (<li>{e}</li>) ) match {
case Nil => Nil
case msgList => val ret = (<div><ul>{msgList}</ul></div>)
styles.foldLeft(ret)((xml, style) => xml % new
UnprefixedAttribute("class", Text(style), Null))
}
}
<div>{if (msgs.isEmpty) styles \\ "default" else msgs}</div>
}
}
Then I do this in the template:
<lift:Messages>
<lift:error_class>errorBox</lift:error_class>
<lift:warning_class>warningBox</lift:warning_class>
<lift:notice_class>noticeBox</lift:notice_class>
<lift:default><span id="tagline">Just do it</span></lift:default>
</lift:Messages>
So now I get a span with "Just do it" that is replaced by the error,
warning, or notice message.
Chas.
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