Convert Struct to XML

Question

I received xml from javascript and parse it to the struct.

 struct gcrInfoStruct {
    var folderView = " "
    var actionType = " "
    var isProtocolReview = " "
    var folder: [folderDetail] = []
}

How could i convert this struct back to xml in order to pass to javascript?

Answer 1

From your code I do not know what a folderDetail type looks like, but let's suppose it is something like this:

struct folderDetail {
    var desc:String
    var value:String
}

I also do not know what the pattern of your XML is but let's suppose it is something like this:

<?xml version="1.0" encoding="UTF-8"?>
    <gcrInfoStruct>
        <folderView>Folder View String</folderView>
        <actionType>Action Type String</actionType>
        <isProtocolReview>True or False</isProtocolReview>
        <folder>
            <folder1desc>folder1value</folder1desc>
            <folder2desc>folder2value</folder2desc>
        </folder>
    </gcrInfoStruct>"

If I'm guessing along the right lines then to generate the XML we simply need to generate a string that matches the pattern based on the struct, e.g.

extension gcrInfoStruct {
    func xml() -> String {
        var string = "<?xml version=\"1.0\" encoding=\"UTF-8\"?><gcrInfoStruct><folderView>\(folderView)</folderView><actionType>\(actionType)</actionType><isProtocolReview>\(isProtocolReview)</isProtocolReview><folder>"
        for i in self.folder {
            string.appendContentsOf("<\(i.desc)>\(i.value)</\(i.desc)>")
        }
        string.appendContentsOf("</folder></gcrInfoStruct>")
        return string
    }
}

To implement we'd do something like this:

var gcr = gcrInfoStruct()
// update properties
let xml = gcr.xml()

But if we wanted to return XML as NSData then we'd add this additional code:

extension gcrInfoStruct {
    func xmlData() -> NSData? {
        return self.xml().dataUsingEncoding(NSUTF8StringEncoding)
    }
}

and to implement we'd do something like this:

var gcr = gcrInfoStruct()
// update properties
let data = gcr.xmlData()

It might be that the folderDetail is not simply a pair of strings or that the XML pattern varies but hopefully there is enough here to get you started.