PARSE LOCAL OPML FILE IN OS X 10.10 JXA USING $.NSXMLDocument (parsing 'text' + all other attributes)

ParseAllOPMLAttributes.js

// PARSE LOCAL OPML FILE IN OS X 10.10 JXA USING $.NSXMLDocument
// Ver 2.0 Parse all attributes (ver 1 just parsed text)
function run() {
    var app = Application.currentApplication();
    app.includeStandardAdditions = true;
    
    function readTextFromFile(strPath) {
        return $.NSString.stringWithContentsOfFile(strPath);
    }
    
    var strPath = (
            app.chooseFile({withPrompt: "Choose OPML file:"})
        ).toString(), // Path --> String
        strXML = strPath ? readTextFromFile(strPath) : '';
        
    if (!strXML) return;
    
    // JSExport convention:
    // The letter following each ":" is capitalized, and then the ":"s are removed:
    // initWithXMLString:options:error: --> initWithXMLStringOptionsError
    var oXMLDoc1 = $.NSXMLDocument.alloc.initWithXMLStringOptionsError(strXML, 0, null),
        // Outline nodes are children of Body - the second child of the Root
        lstOutline = ObjC.unwrap(oXMLDoc1.rootElement.childAtIndex(1).children),
        lstParse, strJSON;
        
    function parseOPML(lst) {
        var lstParse = [],
            lstAttribs = [],
            lstChiln = [],
            lng = lst.length,
            oNode, dctNode, i, j;
    
    
        for (i = 0; i < lng; i++) {
            oNode = lst[i];
            dctNode = {};
            // Now transfer all keyvalue pairs in outline attributes
            // (Rewriting '_note' if found, as 'note')
            
            lstAttribs = ObjC.unwrap(oNode.attributes);
            j = lstAttribs.length;
            while (j--) {
                oAttrib = lstAttribs[j];
                strKey = ObjC.unwrap(oAttrib.name);
                strValue = ObjC.unwrap(oAttrib.stringValue);
                if (strKey === '_note')
                    dctNode.note = strValue;
                else dctNode[strKey] = strValue;
            }
            lstChiln = ObjC.unwrap(oNode.children);
            if (lstChiln)
                dctNode.chiln = parseOPML(lstChiln);
            lstParse.push(dctNode);
        }
        return lstParse;
    }
        
    lstParse = parseOPML(lstOutline);

    strJSON = JSON.stringify(lstParse,null, 2);
    app.setTheClipboardTo(strJSON);
    return lstParse
}