Best way to determine if document is truly unsaved

Question

Is there a preferred method for determining whether a file is truly unsaved? I'm distinguishing between files that have have been saved and then had some changes made to them (but have a valid name and filePath) and files that have just been created during this session and have not been saved anywhere (other than a temp directory). The only thing I can think of is checking whether an error is thrown by the filePath property; is this really the best way?
(I have looked into both the saved and modified properties, but neither provide this information I am looking for. In theory I could check the name property to see if it starts with "Untitled" but there's nothing stopping a user from actually calling a file that so I'd rather not.)
Quick background: I have a script that lets a user browse to some files and get information about them. Files should be closed after processing, unless of course they were open to begin with. So, I do a check of each file against the documents open when the script starts running and set a flag. Just want to make sure that there isn't a better solution than catching the error.
Brief code:
    var openDocs = app.documents.everyItem().getElements();
    for (var i = 0; i < funcDocs.length; i++)
        var funcDoc = funcDocs[i];
        var fileInUse = false;
        if (funcDoc instanceof File)
            if (openDocs.length == 0) {fileInUse = false;}
            else
                for (var f = 0; f < openDocs.length; f++)
                    try{
                         openDocs[f].filePath;
                    }catch(e){continue;}
                    if (openDocs[f].name == funcDoc.name && openDocs[f].filePath == funcDoc.path)
                        fileInUse = true;
                        break;
            var openDoc = app.open(funcDoc, false, 1147563124);
        else
            var openDoc = funcDoc;
            fileInUse = true;
       //Do something...
        if (fileInUse == false) {openDoc.close();}
I guess I'm looking for a bit of a sanity check that I'm not missing some more straightforward method here. Thanks in advance!

Answer 1

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