Windows File Explorer auto extract zips like Mac Finder

AutoUnZip.wsh.js

function CheckFolderExistsAndCreate(folder) {
    if (fso.FolderExists(folder)) {
        WScript.Echo("destination folder already exists: " + folder);
        WScript.Quit(1);
    }

    fso.CreateFolder(folder);
}

//probe the zip file for depth/complexity
//report back if it is a simple folder to immediately expand into concrete files
//or prompt for just viewing the zip as-is
function isBiggish(items, depth, why) {
    var folderCount = 0;
    var fileCount = 0;

    //WScript.Echo("foldercount: " + folderCount + ", depth: " + depth + ", count: " + items.Count);

    if (depth === 2) { why.why = "is at least 3 folders deep"; return true; }

    for (var i = 0; i < items.Count; i++) {
        var thisitem = items.Item(i);

        //these don't count, would like to avoid them on the extract as well but that's even more "unecessary" enumeration
        if (thisitem.Name == "__MACOSX") continue;

        //WScript.Echo("depth: " + depth + ", name: " + thisitem.Name);

        if (thisitem.IsFolder) {
            folderCount++;
            if (folderCount > 3) { why.why = "has more than 3 folders"; return true; }
            if (isBiggish(thisitem.GetFolder.Items(), depth + 1, why)) { /*we already have a why from call stack*/ return true; }
        }

        if (!thisitem.IsFolder && ++fileCount > 5) { why.why = "has more than 5 files"; return true; }

        if (fso.GetExtensionName(thisitem) == "zip") { why.why = "has zips inside"; return true; };
    }
    return false;
}

var objArgs = WScript.Arguments;
if (objArgs.length === 0) {
    WScript.Echo("please pass zip file as first and only argument")
    WScript.Quit(1);
}

var fso = new ActiveXObject("Scripting.FileSystemObject");
var sh = new ActiveXObject("Shell.Application");

var zipFileFullPath = objArgs.Item(0);

var zipItems = sh.NameSpace(zipFileFullPath).Items();

// if empty, bail out
if (zipItems.Count === 0) {
    WScript.Echo("zip file empty. nothing to do.");
    WScript.Quit(0);
}

var fileObj = fso.GetFile(zipFileFullPath);
var zipFileName = fso.GetBaseName(fileObj); //no path nor extension
var parentPath = fso.GetParentFolderName(fileObj); //yep this is full path not just individual FolderName, despite the name of the method!?
var extractToPath = parentPath + "\\" + zipFileName;

// cool convenience - pull files up out of single nested root folder
var firstItem = zipItems.Item(0);
if (zipItems.Count === 1) {
    if (firstItem.IsFolder) {
        zipItems = firstItem.GetFolder.Items();
        //removed: zipFileName = firstItem.Name;
        //keep full zip file name for single root folders
        //this often preserves a more specfic zip file name with for example version numbers
    }
    else {
        //single file inside zip, don't even create a subfolder, just put it right at the path where the zip itself is
        extractToPath = parentPath;
    }
}

var whyIsBig = { why: null };

// if many files, prompt for full extract versus just view
if (isBiggish(zipItems, 0, whyIsBig)) {
    // https://ss64.com/vb/popup.html
    var wsh = new ActiveXObject("WScript.Shell");
    var result = wsh.Popup(
        "This zip file " + whyIsBig.why + ".\n\n" +
        "Yes = Extract All & ** DELETE .zip **\n" +
        "No = Simply view the zip contents and leave it intact",
        0 /* seconds to wait, 0 = no timeout */,
        "Extract or View",
        3 /* Yes / No / Cancel */ + 32 /* question mark icon */
    );

    switch (result) {

        case 2 /*cancel*/: WScript.Quit(1); break;

        case 7 /* no */:
            //we have to specially fire the "open" verb via ShellExecute since we've overridden the default that would fire via sh.Open()
            sh.ShellExecute(zipFileFullPath, "" /*args*/, "" /*working dir*/, "open" /*operation aka "verb"*/, 1 /*window style, 1=normal*/);
            WScript.Quit(1);
            break;
    }
}

extractToPath !== parentPath && CheckFolderExistsAndCreate(extractToPath);

// finally! we get to do the extract
sh.NameSpace(extractToPath).Copyhere(zipItems);

// automatically pop open file explorer in our new folder, nice!! :)
sh.Open(extractToPath);

// delete the zip file, to recycle bin
// (FYI fso.DeleteFile() deletes permanently, doesn't preserve in recycle bin)
sh.NameSpace(parentPath).ParseName(zipFileName + ".zip").InvokeVerb("Delete");

AutoUnzip_setup.cmd

::create the entry
reg add "HKEY_CURRENT_USER\Software\Classes\CompressedFolder\shell\AutoUnZip" /f /ve /d "AutoUnZip"

::and the actual command to execute
reg add "HKEY_CURRENT_USER\Software\Classes\CompressedFolder\shell\AutoUnZip\command" /f /ve /t REG_EXPAND_SZ /d "wscript /e:javascript \"%~dp0AutoUnZip.wsh.js\" \"^%%L\""

::set as the default command on .zip file double click
reg add "HKEY_CURRENT_USER\Software\Classes\CompressedFolder\shell" /f /ve /t REG_SZ /d AutoUnZip

@timeout /t 5