Report on fonts from batch of documents

Array.prototype.unique = function () { var i, a = {}, r = [], n = this.length; for (i = 0; i < n; ++i) a[this] = 1; for (i in a) r.push(i); return r; }
if (app.documents.length == 0) {
    fontReporter();
} else {
    alert("Please close all documents!", "Font Report Creator");
}

function fontReporter() {
    app.scriptPreferences.userInteractionLevel = UserInteractionLevels.NEVER_INTERACT;
    // write report to file
    var writeReport = function (myData, myFile) { myFile.open('w'); myFile.encoding = 'UTF-8'; for (var d = 0; d < myData.length; d++)myFile.write(myData); myFile.close(); }
    // collect info from document
    var createFontReport = function () {
        var myDoc = app.documents[0];
        var myDocFonts = myDoc.fonts;
        var myDocName = myDoc.name;
        myFonts.push("//// Font report for file: [ " + myDocName + " ] ////\r\r");
        for (var f = 0; f < myDocFonts.length; f++){
            var myString = myDocFonts[f].fontFamily + "\t" + myDocFonts[f].fontStyleName + "\t" + myDocFonts[f].location + "\r";
            myFonts.push(myString); myFontsAll.push(myString);
        }
        //myFonts.sort();
        myFonts.push("\r//// Fonts used count: " + f + " ////\r\r\r");
    }
    var myFonts = [];
    var myFontsAll = [];
    // open/report/close
    var myFolder = Folder.selectDialog("Please select a folder containing the InDesign files.");
    if (myFolder == null) { alert("No folder selected!", "Font Report Creator"); exit(); }
    var myFolderContents = myFolder.getFiles("*.indd");
    if (myFolderContents.lenght == 0) { alert("No InDesign files in folder!", "Font Report Creator"); exit(); }
    for (var i = 0; i < myFolderContents.length; i++) {
        app.open(File(myFolderContents[i]), false);
        if (app.documents[0].saved == true) createFontReport();
        app.documents[0].close(SaveOptions.no);
    }
    var myReportFile = File(myFolder + "/" + "Separate document report - Font Report.txt");
    writeReport(myFonts, myReportFile);
    // complete report
    myFontsAll = myFontsAll.unique();
    myFontsAll.sort();
    myFontsAll.unshift("//// Font report for folder: [ " + myFolder + " ]////\r\r");
    myFontsAll.push("\r//// Fonts used count: " + (myFontsAll.length - 1) + " ////");
    myReportFile = File(myFolder + "/All [INDD] Documents Font Report.txt");
    writeReport(myFontsAll, myReportFile);
    app.scriptPreferences.userInteractionLevel = UserInteractionLevels.INTERACT_WITH_ALL;
    alert("Font reports created!", "Font Report Creator");
}

-Manan