tripwire.php

<?php
/**
 * @package Tripwire
 * @version 0.1
 */
/*
Plugin Name: Tripwire
Plugin URI: http://wordpress.org/plugins/tripwire/
Description: This plugin creates a checksum of all the files in the Wordpress site root. And alerts the site owner if anything has changed.
Version: 0.1
Author: Jay Looney
Author URI: https://www.jaylooney.us/
License: GPL2
License URI: https://www.gnu.org/licenses/gpl-2.0.html
*/
if (!class_exists('Tripwire')) {
  add_action('admin_menu', 'Tripwire::init');
  register_activation_hook(__FILE__, 'Tripwire::activate');
  
  abstract class Tripwire {
    public static function init() {
      add_plugins_page('Tripwire Setup', 'Tripwire', 'activate_plugins', 'tripwire', 'Tripwire::plugin_page_html');
    }

    public static function plugin_page_html() {
      echo '
      <div class="wrap">
      <p>Hello from the Tripwire Plugin Menu</p>
      </div>
      ';
    }

    public static function activate() {
      $access_type = get_filesystem_method();
      if ($access_type === 'direct') {
        /* We can attempt interaction with the filesystem */
      } else {
        add_action('admin_notice', 'Tripwire::filesystem_notice');
      }
    }

    public static function filesystem_notice() {
      $url = wp_nonce_url(admin_url('plugins.php?page=tripwire'), 'activate-filesystem');
      echo "
      <div class=\"notice notice-info\">
      <p class=\"tw-notice\"><a href=\"$url\">Tripwire needs Filesystem Permissions.</a></p>
      </div>
      ";
    }
  }
}

if (!class_exists('Tripwire_Widget')) {
  add_action('wp_dashboard_setup', 'Tripwire_Widget::init');

  class Tripwire_Widget {
    const WID = 'tripwire-widget';
    const WNAME = 'Tripwire';

    public static function init() {
      wp_add_dashboard_widget(self::WID, self::WNAME, 'Tripwire_Widget::widget_html');
      add_action('admin_enqueue_scripts', 'Tripwire_Widget::widget_css');
    }
    
    public static function widget_css() {
      echo '
      <style type="text/css">
      .tw-error {
        background-color: pink;
      }
      li.tw-listitem span:first-child {
        float: none;
      }
      li.tw-listitem span {
        float: right;
      }
      </style>
      ';
    }

    public static function widget_html() {
      echo '
      <h3>File Status</h3>
      <ul class="tw-list">
        <li class="tw-listitem"><span>tripwire.php</span> <span>60b725f | 60b725f</span></li>
        <li class="tw-listitem tw-error"><span>hello.php</span> <span>3b5d5c3 | d41d8cd</span></li>
        <li class="tw-listitem"><span>akismet.php</span> <span>2cd6ee2 | 2cd6ee2</span></li>
      </ul>
      ';
    }
  }
}