Can I make an existing script (for replacing text in layer names) loop only through selected layers?

Hello, comunity.

A while back, I have found the script below on this forum, courtesy of @Inventsable. It's function is to batch rename layers based on replacing an existing string with another input string. I have modified this script a little bit for personal use, making sure that the string I want to replace is captured through a prompt inside Illustrator, as oposed to the original which was hard-coded.

I'm not much of a coder, so my question now is this: Is it possible to modify this script in a way that will allow it to work only on layers that have been selected?

Looking forward to hearing your thoughts!

// You can change these settings:

var settings = {
    // Should the script guess the name for unnamed items like <Group>, <Path>, etc:
    replaceGenerics: true,
    // Should the script replace "HELLO" when findText is "Hello":
    caseSensitive: false
}

    var findText = Window.prompt ('Enter Search String', 'text 1', 'Find/Replace Layer Names');
    
    if (findText == null) {
        alert ('Cancelled by user');
    }

    var replaceText = Window.prompt ('Enter Replace String', 'text 2', 'Find/Replace Layer Names');
    
    if (replaceText == null) {
        alert ('Cancelled by user');
    }

/**
 * 
 * Don't edit below unless you know what you're doing
 * 
 */

Array.prototype.forEach = function (callback) {
    for (var i = 0; i < this.length; i++) callback(this[i], i, this);
};
function get(type, parent) {
    if (arguments.length == 1 || !parent) parent = app.activeDocument;
    var result = [];
    if (!parent[type]) return [];
    for (var i = 0; i < parent[type].length; i++) {
        result.push(parent[type][i]);
        if (parent[type][i][type])
            result = [].concat(result, get(type, parent[type][i]));
    }
    return result || [];
}

function findReplace(find, replace, options) {
    var layers = get('layers');
    var pageItems = get('pageItems');
    var list = [].concat(layers, pageItems);
    var findRX = new RegExp(getEscapedRXString(find), !options.caseSensitive ? 'i' : null)
    list.forEach(function (item) {
        if (item.name.length)
            item.name = item.name.replace(findRX, replace)
        else
            item.name = options.replaceGenerics && findRX.test(item.typename)
                ? item.typename.replace(/item/i, '').replace(findRX, replace)
                : item.name
    })
}

function getEscapedRXString(string) {
    return string.replace(/[|\\{}()[\]^$+*?.]/g, '\\$&');
}

findReplace(findText, replaceText, settings)