Export a list of hyperlinks used in file with location

As noted in the link Mike posted, which contained an incomplete solution, hyperlinks can be a bit fickle and there can be lots of different kinds of hyperlinks in a given document, so I tried to encapsulate all of them below. Let me know if you encounter any bugs.  

//HyperlinkExporter.jsx
//Creates a 5-column, tab-delimited .txt file on your desktop called 
//hyperExporter.txt with hyperlink information
//"Null" will be reported for any invalid hyperlinks
//"PB" will be reported for page source items that are on the pasteboard
//Author: Brian Pifer, www.designtimesolutions.com

var main = function() {
    var doc = app.documents[0];
    if (!doc || !doc.isValid) { return; }
    var f = File("~/Desktop/hyperExporter.txt");
        f.encoding = "UTF-8";
        f.open("w");

    var hypers = doc.hyperlinks.everyItem().getElements();
    var hld, hls, arr;
    f.writeln("Hyperlink Name\tHyperlink Source Type\tHyperlink Source Page\tHyperlink Destination Type\tHyperlink Destination");
    for (var i = 0; i < hypers.length; i++) {
        arr = [];
        if (!hypers[i]) {
            f.writeln("null\tnull\tnull\tnull\tnull");
            continue;
        }
        if (!hypers[i].isValid) {
            f.writeln(hypers[i].name + "\tnull\tnull\tnull\tnull");
            continue;
        }
        arr.push(hypers[i].name);
        hls = hypers[i].source;
        getSourceInfo(hls, arr);
        hld = hypers[i].destination;
        getDestInfo(hld, arr);
        f.writeln(arr.join("\t"));
    }
    f.close();
    alert("Done!\nCheck your desktop for hyperExporter.txt");
}

var getSourceInfo = function(source, arr) {
    var type = source.constructor.name;
    switch(type) {
        case "HyperlinkPageItemSource":
            arr.push("Page Item");
            try {
                arr.push(source.sourcePageItem.parentPage.name);
            } catch(e) {
                arr.push("PB");
            }
            break;
        case "HyperlinkTextSource":
            arr.push("Text Source");
            try {
                arr.push(source.sourceText.parentTextFrames[0].parentPage.name);
            } catch(e) {
                arr.push("PB");
            }
            break;
        case "CrossReferenceSource":
            arr.push("Crossreference");
            try {
                arr.push(source.sourceText.parentTextFrames[0].parentPage.name);
            } catch(e) {
                arr.push("PB")
            }
            break;
        default:
            arr.push("null", "null");
            break;
    }
}

var getDestInfo = function(dest, arr) {
    var type = dest.constructor.name;
    switch(type) {
        case "HyperlinkExternalPageDestination":
            arr.push("External Page");
            arr.push(dest.parent.name + ": Page " + dest.name);
            break;
        case "HyperlinkPageDestination":
            arr.push("Page");
            arr.push(dest.destinationPage.name);
            break;
        case "HyperlinkTextDestination":
            arr.push("Text");
            arr.push(dest.name);
            break;
        case "HyperlinkURLDestination":
            arr.push("URL/Email");
            arr.push(dest.destinationURL);
            break;
        case "ParagraphDestination":
            arr.push("Paragraph");
            try {
                arr.push(dest.destinationText.contents);
            } catch(e) {
                arr.push(dest.name);
            }
            break;
        default: 
            arr.push("null", "null");
            break;
    }
}
main();