[SharePoint 2013] Set value for people editor with JSOM

function PeoplePicker() {
    this.context = null;
    this.web = null;
    this.currentUser = null;
    this.parentTagId = null

    this.SetParentTagId = function (id) {
        this.parentTagId = id;
    }

    this.SetLoggedInUser = function () {
        if (this.parentTagId != null) {
            this.getWebUserData();
        }
    }

    this.getWebUserData = function () {
        this.context = new SP.ClientContext.get_current();
        this.web = this.context.get_web();
        this.currentUser = this.web.get_currentUser();
        this.currentUser.retrieve();
        this.context.load(this.web);
        this.context.executeQueryAsync(Function.createDelegate(this, this.onSuccessMethod),
                                       Function.createDelegate(this, this.onFailureMethod));
    }

    this.onSuccessMethod = function () {
        this.setDefaultValue(this.currentUser.get_title());
    }

    this.onFailureMethod = function () {
        alert('request failed ' + args.get_message() + '\n' + args.get_stackTrace());
    }

    this.setDefaultValue = function (value) {
        var parentTag = document.getElementById(this.parentTagId);
        if (parentTag != null) {
            var _ppe = $("input[title='" + $(parentTagId).attr('title') + "']");
            _ppe.val(value);
            var _ppo = SPClientPeoplePicker.SPClientPeoplePickerDict[this.parentTagId];
            _ppo.AddUnresolvedUserFromEditor(true);
        }
    }
}

function SetWebUserData() {
    var pplPicker = new PeoplePicker();
    var controlId = $('td.ms-formlabel:contains("field name")').siblings('td').find('div[title="field name"]').prop("id");
    pplPicker.SetParentTagId(controlId);
    pplPicker.SetLoggedInUser();
}


$(document).ready(function(){
    ExecuteOrDelayUntilScriptLoaded(SetWebUserData, "sp.js");
});