inesonic-ninja-forms-password-validator.php

<?php
/**
 * Plugin Name: Inesonic NinjaForms Password Validator
 * Plugin URI: http://www.inesonic.com
 * Description: A small proprietary plug-in to validate passwords entered using NinjaForms
 * Version: 1.0.0
 * Author: Inesonic, LLC
 * Author URI: http://www.inesonic.com
 */

/***********************************************************************************************************************
 * Copyright 2020 - 2022, Inesonic, LLC.
 *
 * GNU Public License, Version 3:
 *   This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public
 *   License as published by the Free Software Foundation, either version 3 of the License, or (at your option) any
 *   later version.
 *
 *   This program is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied
 *   warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
 *   details.
 *
 *   You should have received a copy of the GNU General Public License along with this program.  If not, see
 *   <https://www.gnu.org/licenses/>.
 ***********************************************************************************************************************
 * Code is heavily inspired by an example on GitHub by Kyle B. Johnson, found
 * at:
 *
 * https://github.com/kjohnson/ninja-forms-custom-field-validation
 */

/* Password validator plug-in class. */
final class InesonicNinjaFormsPasswordValidator {
    const VERSION = '1.0.0';
    const SLUG    = 'inesonic-ninja-forms-password-validator';
    const NAME    = 'Inesonic NinjaForms Password Validator';
    const AUTHOR  = 'Inesonic, LLC';
    const PREFIX  = 'InesonicNinjaFormsPasswordValidator';

    private static $instance;  /* Plug-in instance */
    public static  $dir = '';  /* Plug-in directory */
    public static  $url = '';  /* Plug-in URL */

    /* Method that is called to initialize a single instance of the plug-in */
    public static function instance() {
        if (!isset(self::$instance)                                           &&
            !(self::$instance instanceof InesonicNinjaFormsPasswordValidator)    ) {
            self::$instance = new InesonicNinjaFormsPasswordValidator();
            self::$dir      = plugin_dir_path(__FILE__);
            self::$url      = plugin_dir_url(__FILE__);

            spl_autoload_register(array(self::$instance, 'autoloader'));
        }
    }

    /* This method ties the plug-in into the rest of the WordPress framework by adding hooks where needed. */
    public function __construct() {
        add_action('admin_init', array($this, 'setup_license'));
        add_action('wp_enqueue_scripts', array( $this, 'enqueue_scripts'));
    }

    public function enqueue_scripts() {
        wp_enqueue_script(
            'inesonic-ninja-forms-password-validator',
            self::$url . 'assets/js/inesonic-strong-password-validator.js',
            array('nf-front-end')
        );
    }

    /*
     * Optional methods for convenience.
     */

    public function autoloader($class_name) {
        if (!class_exists($class_name) and (FALSE !== strpos($class_name, self::PREFIX))) {
            $class_name = str_replace(self::PREFIX, '', $class_name);
            $classes_dir = realpath(plugin_dir_path(__FILE__)) . DIRECTORY_SEPARATOR . 'includes' . DIRECTORY_SEPARATOR;
            $class_file = str_replace('_', DIRECTORY_SEPARATOR, $class_name) . '.php';

            if (file_exists($classes_dir . $class_file)) {
                require_once $classes_dir . $class_file;
            }
        }
    }

    /* This method is apparently required by NinjaForms */
    public function setup_license() {
        if (class_exists('NF_Extension_Updater')) {
            new NF_Extension_Updater(self::NAME, self::VERSION, self::AUTHOR, __FILE__, self::SLUG);
        }
    }
}

/* Function that returns the main plug-in instance. */
function InesonicNinjaFormsPasswordValidator() {
    return InesonicNinjaFormsPasswordValidator::instance();
}

InesonicNinjaFormsPasswordValidator();