> I have a form which allows a user to upload a file. The form is
> patterned after upload Wicket example.
>
> If the file being uploaded will overwrite an existing file I need to
> prompt the user if they want to replace the existing file or not.
> What's the best way to implement this functionality?
There is nothing special about it. Just display a confirmation page. Only
if the user chooses to go ahead, will it save the file. Below is an example
doing that written in Scala (as my exercise in learning Scala):
class MyPage extends WebPage {
val f = new Form[Unit]("f") {
override def onSubmit = {
val exists = true
if (exists) {
setResponsePage(new ConfirmSavePage(upload.getFileUpload))
} else {
Console.println("saving the file
"+upload.getFileUpload.getClientFileName)
}
}
}
add(f)
val upload = new FileUploadField("upload")
f.add(upload)
}
class ConfirmSavePage(upload: FileUpload) extends WebPage {
val f = new Form[Unit]("f") {
override def onSubmit = {
Console.println("saving the file "+upload.getClientFileName)
}
}
add(f)
val cancel = new Button("cancel") {
override def onSubmit = {
Console.println("Aborting")
setResponsePage(classOf[MyPage])
}
}
f.add(cancel)
}
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