<?php

/**
 * Plugin Name: Tracking Script Manager
 * Plugin URI: http://wordpress.org/plugins/tracking-script-manager/
 * Description: A plugin that allows you to add tracking scripts to your site.
 * Version: 2.0.14
 * Author: Red8 Interactive
 * Author URI: http://red8interactive.com
 * License: GPLv2 or later
 */
/*
	Copyright 2019 Red8 Interactive  (email : james@red8interactive.com)

	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 2
	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, write to the Free Software
	Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
*/
if (! defined('ABSPATH')) {
	exit; // Exit if accessed directly
}
if (! class_exists('Tracking_Scripts')) {

	class Tracking_Scripts
	{
		/**
		 * @var TSM_Process_Tracking_Scripts
		 */
		protected $process_all;

		function __construct() {}

		public function initialize()
		{

			// Constants
			define('TRACKING_SCRIPT_PATH', plugins_url(' ', __FILE__));
			define('TRACKING_SCRIPT_BASENAME', plugin_basename(__FILE__));
			define('TRACKING_SCRIPT_DIR_PATH', plugin_dir_path(__FILE__));
			define('TRACKING_SCRIPT_TEXTDOMAIN', 'tracking-scripts-manager');
			// Actions
			add_action('init', array($this, 'register_scripts_post_type'));
			add_action('save_post', array($this, 'save_post'));
			add_action('admin_enqueue_scripts', array($this, 'admin_enqueue_scripts'));
			add_action('wp_head', array($this, 'find_header_tracking_codes'), 10);
			add_action('wp_footer', array($this, 'find_footer_tracking_codes'), 10);
			add_action('admin_menu', array($this, 'tracking_scripts_create_menu'));
			add_action('add_meta_boxes', array($this, 'add_script_metaboxes'));
			add_action('wp_ajax_tracking_scripts_get_posts', array($this, 'tracking_scripts_posts_ajax_handler'));
			add_action(
				'manage_r8_tracking_scripts_posts_custom_column',
				array(
					$this,
					'tracking_script_column_content',
				),
				10,
				2
			);
			add_action('wp_body_open', array($this, 'find_page_tracking_codes'));
			add_action('tsm_page_scripts', array($this, 'find_page_tracking_codes'));
			add_action('admin_init', array($this, 'process_handler'));
			add_action('admin_notices', array($this, 'admin_notices'));
			// fallback for page scripts if wp_body_open action isn't supported
			add_action(
				'get_footer',
				function () {
					if (did_action('wp_body_open') === 0) {
						add_action('wp_footer', array($this, 'find_page_tracking_codes'));
					}
				}
			);
			// Filters
			add_filter('manage_r8_tracking_scripts_posts_columns', array($this, 'add_tracking_script_columns'));
			add_filter(
				'manage_edit-r8_tracking_scripts_sortable_columns',
				array(
					$this,
					'tracking_scripts_column_sort',
				)
			);
			// Includes
			require_once plugin_dir_path(__FILE__) . 'classes/wp-async-request.php';
			require_once plugin_dir_path(__FILE__) . 'classes/wp-background-process.php';
			require_once plugin_dir_path(__FILE__) . 'classes/class-process-tracking-scripts.php';
			$this->process_all = new TSM_Process_Tracking_Scripts();
		}

		/*************************************************
		 * Front End
		 **************************************************/
		public function process_handler()
		{
			if (! isset($_GET['tsm_update_scripts']) || ! isset($_GET['_wpnonce'])) {
				return;
			}
			if (! wp_verify_nonce(sanitize_key(wp_unslash($_GET['_wpnonce'])), 'tsm_update_scripts')) {
				return;
			}
			if ('true' === $_GET['tsm_update_scripts']) {
				update_option('tsm_is_processing', true);
				$this->handle_all();
			}
		}

		protected function handle_all()
		{
			$scripts = $this->get_tracking_scripts();
			if (! empty($scripts)) {
				foreach ($scripts as $script) {
					$this->process_all->push_to_queue($script);
				}
				$this->process_all->save()->dispatch();
			}
		}


		protected function get_tracking_scripts()
		{
			$scripts        = array();
			$header_scripts = get_option('header_tracking_script_code') ? json_decode(get_option('header_tracking_script_code')) : null;
			$page_scripts   = get_option('page_tracking_script_code') ? json_decode(get_option('page_tracking_script_code')) : null;
			$footer_scripts = get_option('footer_tracking_script_code') ? json_decode(get_option('footer_tracking_script_code')) : null;
			if (! empty($header_scripts)) {
				$scripts = array_merge($scripts, $header_scripts);
			}
			if (! empty($page_scripts)) {
				$scripts = array_merge($scripts, $page_scripts);
			}
			if (! empty($footer_scripts)) {
				$scripts = array_merge($scripts, $footer_scripts);
			}

			return $scripts;
		}

		function admin_notices()
		{
			$class                = 'notice notice-info is-dismissible';
			$header_scripts       = get_option('header_tracking_script_code');
			$page_scripts         = get_option('page_tracking_script_code');
			$footer_scripts       = get_option('footer_tracking_script_code');
			$is_processing        = get_option('tsm_is_processing');
			$has_tracking_scripts = $header_scripts || $page_scripts || $footer_scripts;
			$is_admin             = current_user_can('manage_options');
			if ($has_tracking_scripts && $is_processing && $is_admin) {
				$message = __('Your scripts are currently processing. This may take several minutes. If you don’t see all of your scripts please wait a moment and refresh the page.', TRACKING_SCRIPT_TEXTDOMAIN);
				$notice  = sprintf('<div class="%1$s"><p>%2$s</p></div>', esc_attr($class), esc_html($message));
				echo esc_html($notice);
			}
			if ($has_tracking_scripts && ! $is_processing && $is_admin) {
				$url     = wp_nonce_url(admin_url('edit.php?post_type=r8_tracking_scripts&tsm_update_scripts=true&tsm_is_processing=true'), 'tsm_update_scripts');
				$message = __('Tracking Scripts Manager has updated to a new version, click OK to update your scripts to the updated version.', TRACKING_SCRIPT_TEXTDOMAIN);
				$notice  = sprintf('<div class="%1$s"><p>%2$s</p><a class="button button-primary" href="%3$s" style="margin-bottom: .5em;">OK</a></div>', esc_attr($class), esc_html($message), esc_url($url));
				echo esc_html($notice);
			}
		}



		public function print_tsm_scripts($script_id, $page, $page_id, $expiry_info)
		{
			$expiry_data = $this->expiry_data($expiry_info);
			$if_expire   = $this->check_expiry_script($expiry_data['type'], $expiry_data['start_date'], $expiry_data['end_date'], $script_id);
			$script      = get_post_meta($script_id, 'r8_tsm_script_code', true);

			$encoded_save = get_post_meta($script_id, 'r8_tsm_encoded_save', true);
			if (!$encoded_save) {
				$script = base64_encode($script);
				$this->save_script($script_id, $script);
			}

			$page_script = $this->esc_script($script);


			// Check if this is the right page
			if ((is_array($page) && in_array(intval($page_id), $page, true)) || empty($page)) {
				// Is it scheduled and not expired or set never to expire?
				if ('Schedule' === $expiry_data['type'] && ! $if_expire || 'Never' === $expiry_data['type']) {
					// Render script
					echo ($page_script);
				}
			}
		}

		// Header Tracking Codes
		function find_header_tracking_codes()
		{
			global $wp_query;
			$page_id        = $wp_query->post->ID;
			$args           = array(
				'post_type'      => 'r8_tracking_scripts',
				'post_status'    => 'publish',
				'posts_per_page' => -1,
				'meta_key'       => 'r8_tsm_script_order',
				'orderby'        => 'meta_value_num',
				'order'          => 'ASC',
				'meta_query'     => array(
					'relation' => 'AND',
					array(
						'key'     => 'r8_tsm_script_location',
						'value'   => 'header',
						'compare' => '=',
					),
					array(
						'key'     => 'r8_tsm_active',
						'value'   => 'active',
						'compare' => '=',
					),
				),
			);
			$header_scripts = new WP_Query($args);


			if ($header_scripts->have_posts()) {
				while ($header_scripts->have_posts()) :
					$header_scripts->the_post();
					$page        = get_post_meta(get_the_ID(), 'r8_tsm_script_page', true);
					$expiry_info = get_post_meta(get_the_ID(), 'r8_tsm_script_expiry_info', true);
					$this->print_tsm_scripts(get_the_ID(), $page, $page_id, $expiry_info);
				endwhile;
				wp_reset_postdata();
			}
		}

		function find_page_tracking_codes()
		{
			global $wp_query;
			$page_id      = $wp_query->post->ID;
			$args         = array(
				'post_type'      => 'r8_tracking_scripts',
				'posts_per_page' => -1,
				'post_status'    => 'publish',
				'meta_key'       => 'r8_tsm_script_order',
				'orderby'        => 'meta_value_num',
				'order'          => 'ASC',
				'meta_query'     => array(
					'relation' => 'AND',
					array(
						'key'     => 'r8_tsm_script_location',
						'value'   => 'page',
						'compare' => '=',
					),
					array(
						'key'     => 'r8_tsm_active',
						'value'   => 'active',
						'compare' => '=',
					),
				),
			);
			$page_scripts = new WP_Query($args);
			if ($page_scripts->have_posts()) {
				while ($page_scripts->have_posts()) :
					$page_scripts->the_post();
					$page        = get_post_meta(get_the_ID(), 'r8_tsm_script_page', true);
					$expiry_info = get_post_meta(get_the_ID(), 'r8_tsm_script_expiry_info', true);
					$this->print_tsm_scripts(get_the_ID(), $page, $page_id, $expiry_info);
				endwhile;
				wp_reset_postdata();
			}
		}

		function find_footer_tracking_codes()
		{
			global $wp_query;
			$page_id        = $wp_query->post->ID;
			$args           = array(
				'post_type'      => 'r8_tracking_scripts',
				'posts_per_page' => -1,
				'post_status'    => 'publish',
				'meta_key'       => 'r8_tsm_script_order',
				'orderby'        => 'meta_value_num',
				'order'          => 'ASC',
				'meta_query'     => array(
					'relation' => 'AND',
					array(
						'key'     => 'r8_tsm_script_location',
						'value'   => 'footer',
						'compare' => '=',
					),
					array(
						'key'     => 'r8_tsm_active',
						'value'   => 'active',
						'compare' => '=',
					),
				),
			);
			$footer_scripts = new WP_Query($args);
			if ($footer_scripts->have_posts()) {
				while ($footer_scripts->have_posts()) :
					$footer_scripts->the_post();
					$page        = get_post_meta(get_the_ID(), 'r8_tsm_script_page', true);
					$expiry_info = get_post_meta(get_the_ID(), 'r8_tsm_script_expiry_info', true);
					$this->print_tsm_scripts(get_the_ID(), $page, $page_id, $expiry_info);
				endwhile;
				wp_reset_postdata();
			}
		}

		function add_tracking_script_columns($columns)
		{
			$columns = array(
				'cb'       => '<input type="checkbox" />',
				'title'    => __('Script Title', TRACKING_SCRIPT_TEXTDOMAIN),
				'global'   => __('Global', TRACKING_SCRIPT_TEXTDOMAIN),
				'location' => __('Location', TRACKING_SCRIPT_TEXTDOMAIN),
				'status'   => __('Status', TRACKING_SCRIPT_TEXTDOMAIN),
				'schedule' => __('Schedule', TRACKING_SCRIPT_TEXTDOMAIN),
			);

			return $columns;
		}

		function tracking_script_column_content($column_name, $post_ID)
		{
			$expiry_info      = get_post_meta($post_ID, 'r8_tsm_script_expiry_info', true);
			$expiry_data      = $this->expiry_data($expiry_info);
			$if_expire        = $this->check_expiry_script($expiry_data['type'], $expiry_data['start_date'], $expiry_data['end_date'], $post_ID);
			$scheduled_status = $this->scheduled_status($if_expire, $expiry_data['type'], $expiry_data['start_date'], $expiry_data['end_date']);

			if ($column_name === 'status') {
				$active = get_post_meta($post_ID, 'r8_tsm_active', true);
				echo ($active === 'inactive') ? '<span class="expired">' : '<span>';
				if ($active === 'active') {
					echo 'Active';
				} else {
					echo 'Inactive';
				}
				echo esc_attr($scheduled_status);
				echo '</span>';
			}

			if ($column_name === 'global') {
				$global = get_post_meta($post_ID, 'r8_tsm_script_page', true);
				if (empty($global)) {
					echo '&nbsp;&nbsp;&nbsp;&nbsp;&#10003;';
				} else {
					echo '&nbsp;&nbsp;&nbsp;&nbsp;&cross;';
				}
			}
			if ($column_name === 'location') {
				$location = get_post_meta($post_ID, 'r8_tsm_script_location', true);
				if ($location) {
					echo esc_html(ucwords($location));
				}
			}
			if ($column_name === 'schedule') {
				if ($expiry_data['type'] === 'Schedule') {
					echo esc_html(
						sprintf(
							__('Scheduled <b>%1$s</b> to <b>%2$s</b>', TRACKING_SCRIPT_TEXTDOMAIN),
							($expiry_data['start_date']),
							($expiry_data['end_date'])
						)
					);
				} else {
					esc_html_e('Never expires', TRACKING_SCRIPT_TEXTDOMAIN);
				}
			}
		}

		function tracking_scripts_column_sort($columns)
		{
			$columns['global']   = 'global';
			$columns['location'] = 'location';
			$columns['status']   = 'status';
			$columns['schedule'] = 'schedule';

			return $columns;
		}

		public function add_script_metaboxes()
		{
			add_meta_box(
				'r8_tsm_script_code_wrapper',
				__('Script Code', TRACKING_SCRIPT_TEXTDOMAIN),
				array(
					$this,
					'script_code_metabox',
				),
				'r8_tracking_scripts',
				'normal'
			);
			add_meta_box(
				'r8_tsm_script_active',
				__('Script Status', TRACKING_SCRIPT_TEXTDOMAIN),
				array(
					$this,
					'script_active_metabox',
				),
				'r8_tracking_scripts',
				'side'
			);
			add_meta_box(
				'r8_tsm_script_expiry',
				__('Schedule', TRACKING_SCRIPT_TEXTDOMAIN),
				array(
					$this,
					'script_expiry_metabox',
				),
				'r8_tracking_scripts',
				'side'
			);
			add_meta_box(
				'r8_tsm_script_order',
				__('Script Order', TRACKING_SCRIPT_TEXTDOMAIN),
				array(
					$this,
					'script_order_metabox',
				),
				'r8_tracking_scripts',
				'side'
			);
			add_meta_box(
				'r8_tsm_script_location',
				__('Script Location', TRACKING_SCRIPT_TEXTDOMAIN),
				array(
					$this,
					'script_location_metabox',
				),
				'r8_tracking_scripts',
				'normal'
			);
			add_meta_box(
				'r8_tsm_script_page',
				__('Specific Script Placement (Page(s) or Post(s))', TRACKING_SCRIPT_TEXTDOMAIN),
				array(
					$this,
					'script_page_metabox',
				),
				'r8_tracking_scripts',
				'normal'
			);
		}

		function script_code_metabox()
		{
			global $post;
			$script_code = get_post_meta($post->ID, 'r8_tsm_script_code', true);
			/**
			 * Check if script was saved using base64 encode
			 */
			$encoded_save = get_post_meta($post->ID, 'r8_tsm_encoded_save', true);
			if (!$encoded_save) {
				$script_code = base64_encode($script_code);
				$this->save_script($post->ID, $script_code);
			}

			if ($this->is_file_modification_allowed()) {
?>
				<div class="red8_script_notice" style="    padding: 1rem;    border: 1px solid lightcoral;    box-shadow: 0 2px 6px rgb(0 0 0 / 25%);    border-radius: 11px;}">
					<h1>Heads up!</h1>
					<p>
						Adding custom scripts is not recommended and could break your site.
					</p>
					<p>
						Please double check that the code you are adding is secure and make sure your WordPress site is backed up
						in the likely event that something breaks.</p>

					<p>
						<button type="button" class="button button-primary consent">I understand</button>
					</p>

				</div>
				<script type="text/javascript">
					jQuery(function($) {
						$(".red8_script_notice button.consent").on("click", function() {
							$(".red8_script_notice").hide();
							$("#red8_code_editor_wrapper")
								.css("opacity", 1)
								.css('height', 'auto');

						})
					})
				</script>

				<div id="red8_code_editor_wrapper" style="opacity: 0; height: 0;">
					<textarea name="r8_tsm_script_code" id="r8_tsm_script_code" rows="5"><?php
																							if ($script_code) {
																								echo stripslashes(html_entity_decode(base64_decode($script_code), ENT_QUOTES, 'cp1252'));
																							}
																							?></textarea>
				</div>

			<?php
			} else {
			?>
				<div class="notice notice-error ">
					<p>File modification & custom scripts have been disallowed by your WordPress config.</p>
				</div>
<?php
			}
		}

		function script_active_metabox()
		{
			global $post;
			$active           = get_post_meta($post->ID, 'r8_tsm_active', true);
			$expiry_info      = get_post_meta($post->ID, 'r8_tsm_script_expiry_info', true);
			$expiry_data      = $this->expiry_data($expiry_info);
			$if_expire        = $this->check_expiry_script($expiry_data['type'], $expiry_data['start_date'], $expiry_data['end_date'], $post->ID);
			$scheduled_status = $this->scheduled_status($if_expire, $expiry_data['type'], $expiry_data['start_date'], $expiry_data['end_date']);

			include_once TRACKING_SCRIPT_DIR_PATH . '/templates/script-active-metabox.php';
		}

		function script_expiry_metabox()
		{
			global $post;
			$expiry_info      = get_post_meta($post->ID, 'r8_tsm_script_expiry_info', true);
			$expiry_data      = $this->expiry_data($expiry_info);
			$if_expire        = $this->check_expiry_script($expiry_data['type'], $expiry_data['start_date'], $expiry_data['end_date'], $post->ID);
			$scheduled_status = $this->scheduled_status($if_expire, $expiry_data['type'], $expiry_data['start_date'], $expiry_data['end_date']);
			include_once TRACKING_SCRIPT_DIR_PATH . '/templates/script-expiry-metabox.php';
		}

		function script_order_metabox()
		{
			global $post;
			$order = get_post_meta($post->ID, 'r8_tsm_script_order', true);
			include_once TRACKING_SCRIPT_DIR_PATH . '/templates/script-order-metabox.php';
		}

		function script_location_metabox()
		{
			global $post;
			$location = get_post_meta($post->ID, 'r8_tsm_script_location', true);
			include_once TRACKING_SCRIPT_DIR_PATH . '/templates/script-location-metabox.php';
		}

		function script_page_metabox()
		{
			global $post;
			$script_page = get_post_meta($post->ID, 'r8_tsm_script_page', true);

			include_once TRACKING_SCRIPT_DIR_PATH . '/templates/script-page-metabox.php';
		}

		public function get_date_time($timespan, $format)
		{
			$current_time = new DateTime();
			$current_time->add(new DateInterval($timespan));
			$expire_time = $current_time->format($format);

			return $expire_time;
		}

		public function check_expiry_script($expiry_date_type, $expiry_start_date, $expiry_end_date, $script_id)
		{
			$result = false;
			if ($expiry_date_type === 'Never') {
				return $result;
			}
			if (empty($expiry_start_date)) {
				return $result;
			}
			if (empty($expiry_end_date)) {
				return $result;
			}

			$date_range = array();
			$start_time = $expiry_start_date;
			$interval   = new DateInterval('P1D');
			$end_time   = new DateTime($expiry_end_date);
			$end_time->add($interval);
			$period     = new DatePeriod(new DateTime($start_time), $interval, $end_time);
			$today      = new DateTime();
			$today_date = $today->format('Y-m-d');
			foreach ($period as $key => $value) {
				$array[] = $value->format('Y-m-d');
			}
			if (! in_array($today_date, $array, true)) {
				$result = true;
			}
			$this->set_script_status($script_id, $result);
			return $result;
		}

		public function set_script_status($script_id, $result)
		{
			global $post;
			if (! empty($post->post_type)) {
				if ($post->post_type === 'r8_tracking_scripts') {
					if ($script_id === $post->ID) {
						$active = get_post_meta($post->ID, 'r8_tsm_active', true);
						if ($result === true) { // expire true
							if ('active' === $active) {
								update_post_meta($post->ID, 'r8_tsm_active', 'inactive');
							}
						} else { // expire false
							if ('inactive' === $active) {
								update_post_meta($post->ID, 'r8_tsm_active', 'active');
							}
						}
					}
				}
			}
		}

		public function expiry_data($expiry_info)
		{
			$type       = is_object($expiry_info) ? $expiry_info->type : 'Never';
			$start_date = is_object($expiry_info) ? $expiry_info->schedule_start : '';
			$end_date   = is_object($expiry_info) ? $expiry_info->schedule_end : '';
			return array(
				'type'       => $type,
				'start_date' => $start_date,
				'end_date'   => $end_date,
			);
		}

		public function scheduled_status($if_expire, $expiry_date_type, $expiry_start_date, $expiry_end_date)
		{
			$status = '';
			$start  = new DateTime($expiry_start_date);
			$end    = new DateTime($expiry_end_date);
			$today  = new DateTime();
			if ($expiry_date_type === 'Schedule') {
				if (! $if_expire) {
					$status = '';
				} else {
					if ($today < $start) {
						$diff      = strtotime($today->format('y-m-d')) - strtotime($start->format('y-m-d'));
						$count     = abs(round($diff / 86400));
						$next_date = sprintf(_n('tomorrow', 'in %s days', $count, 'tracking-scripts-manager'), $count);
						$status    = sprintf('(Starting %s) ', $next_date);
					}
					if ($today > $end) {
						$status = ' (Expired)';
					}
				}
			}
			return $status;
		}

		public function register_scripts_post_type()
		{
			$labels = array(
				'name'               => _x('Tracking Scripts', TRACKING_SCRIPT_TEXTDOMAIN),
				'singular_name'      => _x('Tracking Script', TRACKING_SCRIPT_TEXTDOMAIN),
				'menu_name'          => _x('Tracking Scripts', TRACKING_SCRIPT_TEXTDOMAIN),
				'name_admin_bar'     => _x('Tracking Scripts', TRACKING_SCRIPT_TEXTDOMAIN),
				'add_new'            => _x('Add New Tracking Script', TRACKING_SCRIPT_TEXTDOMAIN),
				'add_new_item'       => __('Add New Tracking Script', TRACKING_SCRIPT_TEXTDOMAIN),
				'new_item'           => __('New Tracking Script', TRACKING_SCRIPT_TEXTDOMAIN),
				'edit_item'          => __('Edit Tracking Script', TRACKING_SCRIPT_TEXTDOMAIN),
				'view_item'          => __('View Tracking Script', TRACKING_SCRIPT_TEXTDOMAIN),
				'all_items'          => __('All Tracking Scripts', TRACKING_SCRIPT_TEXTDOMAIN),
				'search_items'       => __('Search Tracking Scripts', TRACKING_SCRIPT_TEXTDOMAIN),
				'parent_item_colon'  => __('Parent Tracking Scripts:', TRACKING_SCRIPT_TEXTDOMAIN),
				'not_found'          => __('No Tracking Scripts found.', TRACKING_SCRIPT_TEXTDOMAIN),
				'not_found_in_trash' => __('No Tracking Scripts found in Trash.', TRACKING_SCRIPT_TEXTDOMAIN),
			);
			$args   = array(
				'labels'             => $labels,
				'description'        => __('Description.', TRACKING_SCRIPT_TEXTDOMAIN),
				'public'             => false,
				'publicly_queryable' => false,
				'show_ui'            => true,
				'show_in_menu'       => false,
				'query_var'          => false,
				'rewrite'            => array('slug' => 'tracking-scripts'),
				'capability_type'    => 'post',
				'capabilities'       => array(
					'edit_post'          => 'manage_options',
					'read_post'          => 'manage_options',
					'delete_post'        => 'manage_options',
					'edit_posts'         => 'manage_options',
					'edit_others_posts'  => 'manage_options',
					'delete_posts'       => 'manage_options',
					'publish_posts'      => 'manage_options',
					'read_private_posts' => 'manage_options',
				),
				'has_archive'        => false,
				'hierarchical'       => false,
				'menu_position'      => null,
				'supports'           => array(
					'title',
					'script-code',
					'script-active',
					'script-location',
					'script-order',
				),
			);
			register_post_type('r8_tracking_scripts', $args);
		}

		/*************************************************
		 * Admin Area
		 **************************************************/
		function admin_enqueue_scripts($hook)
		{
			global $post;
			if ($hook === 'post.php' || $hook === 'post-new.php') {
				if (! empty($post->post_type) && ($post->post_type === 'r8_tracking_scripts')) {
					wp_enqueue_style('r8-tsm-edit-script', plugins_url('/css/tracking-script-edit.css', __FILE__), array(), md5_file(plugins_url('/css/tracking-script-edit.css', __FILE__)));
					wp_enqueue_style('r8-tsm-select2-css', plugins_url('/css/select2.min.css', __FILE__), array(), md5_file(plugins_url('/css/select2.min.css', __FILE__)));
					wp_enqueue_script('r8-tsm-select2-js', plugins_url('/js/select2.min.js', __FILE__), array(), md5_file(plugins_url('/js/select2.min.js', __FILE__)), true);
					wp_enqueue_script(
						'r8-tsm-post-edit-js',
						plugins_url('/js/post-edit.js', __FILE__),
						array(
							'jquery',
							'r8-tsm-select2-js',
						),
						md5_file(plugins_url('/js/post-edit.js', __FILE__)),
						true
					);
					wp_enqueue_style('jquery-ui-css', 'https://code.jquery.com/ui/1.13.1/themes/base/jquery-ui.css');
					wp_enqueue_script('jquery-ui-datepicker');
				}
			}
			if ($hook === 'post.php' || $hook === 'edit.php') {
				if (! empty($post->post_type) && ($post->post_type === 'r8_tracking_scripts')) {
					wp_enqueue_style('r8-tsm-post-list', plugins_url('/css/post-list.css', __FILE__), array(), md5_file(plugins_url('/css/post-list.css', __FILE__)));
					wp_enqueue_script('r8-tsm-post-list-js', plugins_url('/js/post-list.js', __FILE__), array('jquery'), md5_file(plugins_url('/js/post-list.js', __FILE__)), true);
				}
			}
			if (! empty($post->post_type) && ($post->post_type === 'r8_tracking_scripts')) {
				// code editor support
				$html_editor = wp_enqueue_code_editor(array('type' => 'text/html'));
				if (false !== $html_editor) {
					wp_add_inline_script(
						'code-editor',
						sprintf(
							'jQuery( function() { wp.codeEditor.initialize( "r8_tsm_script_code", %s ); } );',
							wp_json_encode($html_editor)
						)
					);
				}
			}
		}

		private function esc_script($script)
		{
			return stripslashes(html_entity_decode(base64_decode($script), ENT_QUOTES, 'cp1252'));
		}

		private function save_script($post_id, $script_code)
		{
			$script_code = stripslashes(wp_unslash($script_code));
			update_post_meta($post_id, 'r8_tsm_script_code', $script_code);
			update_post_meta($post_id, 'r8_tsm_encoded_save', true);
		}


		private function is_file_modification_allowed()
		{
			if (defined('DISALLOW_FILE_MODS') && DISALLOW_FILE_MODS) {
				return false;
			}
			return true;
		}

		function save_post()
		{
			global $post;
			if (! empty($post->post_type)) {
				if ($post->post_type === 'r8_tracking_scripts') {
					$expiry_obj                 = new \stdClass();
					$expiry_obj->schedule_start = '';
					$expiry_obj->schedule_end   = '';
					$expiry_obj->type           = '';
					if (! empty($_POST['r8_tsm_script_code'])) {
						$script_code = base64_encode($_POST['r8_tsm_script_code']);
						$this->save_script($post->ID, $script_code);
					}
					if (! empty($_POST['r8_tsm_active'])) {
						$tsm_active = sanitize_text_field(wp_unslash($_POST['r8_tsm_active']));
						update_post_meta($post->ID, 'r8_tsm_active', $tsm_active);
					}
					if (! empty($_POST['r8_tsm_script_order'])) {
						update_post_meta($post->ID, 'r8_tsm_script_order', intval($_POST['r8_tsm_script_order']));
					}
					if (! empty($_POST['r8_tsm_script_location'])) {
						update_post_meta($post->ID, 'r8_tsm_script_location', sanitize_text_field(wp_unslash($_POST['r8_tsm_script_location'])));
					}
					if (! empty($_POST['r8_tsm_script_expiry']) || (! empty($_POST['schedule_start']) && ! empty($_POST['schedule_end']))) {
						$expiry_obj->type           = sanitize_text_field(wp_unslash($_POST['r8_tsm_script_expiry'])) ?: 'Never';
						$expiry_obj->schedule_start = sanitize_text_field(wp_unslash($_POST['schedule_start'])) ?: '';
						$expiry_obj->schedule_end   = sanitize_text_field(wp_unslash($_POST['schedule_end'])) ?: '';
						update_post_meta($post->ID, 'r8_tsm_script_expiry_info', $expiry_obj);
						// status updated based on schedule
						if ($expiry_obj->type === 'Schedule') {
							$this->check_expiry_script($expiry_obj->type, $expiry_obj->schedule_start, $expiry_obj->schedule_end, $post->ID);
						}
					}
					if (! empty($_POST['r8_tsm_script_page']) && is_array($_POST['r8_tsm_script_page'])) {

						$script_pages =  array_map('intval', wp_unslash($_POST['r8_tsm_script_page']));

						update_post_meta($post->ID, 'r8_tsm_script_page', $script_pages);
					} else {
						update_post_meta($post->ID, 'r8_tsm_script_page', array());
					}
				}
			}
		}

		public function tracking_scripts_create_menu()
		{
			add_menu_page('Tracking Script Manager', 'Tracking Script Manager', 'manage_options', 'edit.php?post_type=r8_tracking_scripts', null);
			add_submenu_page('edit.php?post_type=r8_tracking_scripts', 'Add New Tracking Script', 'Add New Tracking Script', 'manage_options', 'post-new.php?post_type=r8_tracking_scripts', null);
		}

		// Admin Scripts
		public function tracking_scripts_admin_scripts()
		{
			wp_enqueue_script('jquery');
			wp_enqueue_script('tracking_script_js', plugin_dir_url(__FILE__) . '/js/built.min.js', array(), md5_file(plugin_dir_url(__FILE__) . '/js/built.min.js'), true);
			wp_localize_script('tracking_script_js', 'ajax_object', array('ajax_url' => admin_url('admin-ajax.php')));
		}

		// Ajax Functions
		public function tracking_scripts_posts_ajax_handler()
		{
			$post_type = isset($_POST['postType']) ? sanitize_text_field(wp_unslash($_POST['postType'])) : 'post';
			$args      = array(
				'post_type'      => $post_type,
				'posts_per_page' => -1,
				'orderby'        => 'name',
				'order'          => 'ASC',
			);
			ob_start();
			$query = new WP_Query($args);
			echo '<option value="none" id="none">Choose ' . esc_html(ucwords($post_type)) . '</option>';
			while ($query->have_posts()) :
				$query->the_post();
				echo '<option value="' . esc_attr(get_the_ID()) . '" id="' . esc_attr(get_the_ID()) . '">' . esc_html(ucwords(get_the_title())) . '</option>';
			endwhile;
			wp_reset_postdata();
			echo esc_html(ob_get_clean());
			die();
		}
	}

	function tracking_scripts()
	{

		// globals
		global $tracking_scripts;
		// initialize
		if (! isset($tracking_scripts)) {
			$tracking_scripts = new Tracking_Scripts();
			$tracking_scripts->initialize();
		}

		// return
		return $tracking_scripts;
	}

	// initialize
	tracking_scripts();
}