Question

If a user enters a URL with a action=editDocument, I want to be able to redirect them to the same URL but with action=openDocument.

I assume that I would use the beforePageLoad event?

How could I prevent them from going to the action=editDocument and redirect them to a action=openDocument url?

Answer 1

The following will redirect back to the same page if the parameter action is “editDocument” (and thereby prevent the user from editing the document):

<xp:this.beforePageLoad>
    <![CDATA[#{javascript:
        if (param.get("action")=="editDocument") {
            context.redirectToPage(view.getPageName())
        }
    }]]>
</xp:this.beforePageLoad>

Update: As Mark points out in his answer, the above answer will not preserve a documentId parameter if included. You can check if the documentId parameter is included and then do a proper redirect using that parameter:

<xp:this.beforePageLoad>
    <![CDATA[#{javascript:
        if (param.get("action")=="editDocument") {
            context.redirectToPage(view.getPageName() + "?action=openDocument&documentId=" + param.get("documentId")
        }
    }]]>
</xp:this.beforePageLoad>