shfs.php

<?php
/**
 * Plugin Name: Header and Footer Scripts
 * Plugin URI: http://digitalliberation.org/plugins/header-and-footer-scripts/?utm_source=wphfs_plugin_uri
 * Description: Essential WordPress plugin for almost every website to insert codes like Javascript and CSS. Inserting script to your wp_head and wp_footer made easy.
 * Version: 2.2.1
 * Author: Digital Liberation
 * Author URI: http://digitalliberation.org/?utm_source=wphfs_author_uri
 * Text Domain: header-and-footer-scripts
 * Domain Path: /lang
 * License: GPLv2 or later
 */

/*
Header and Footer Scripts
Copyright (C) 2013 - 2020, Anand Kumar <anand@anandkumar.net>

This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License, version 2, as
published by the Free Software Foundation.

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 St, Fifth Floor, Boston, MA  02110-1301  USA
*/

define('SHFS_PLUGIN_DIR',str_replace('\\','/',dirname(__FILE__)));

if ( !class_exists( 'HeaderAndFooterScripts' ) ) {

	class HeaderAndFooterScripts {

		function __construct() {

			add_action( 'init', array( &$this, 'init' ) );
			add_action( 'admin_init', array( &$this, 'admin_init' ) );
			add_action( 'admin_menu', array( &$this, 'admin_menu' ) );
			add_action( 'wp_head', array( &$this, 'wp_head' ), \get_option('shfs_insert_header_priority', 10) );
			add_action( 'wp_footer', array( &$this, 'wp_footer' ), \get_option('shfs_insert_footer_priority', 10) );

		}

		function init() {

			load_plugin_textdomain( 'header-and-footer-scripts', false, dirname( plugin_basename ( __FILE__ ) ).'/lang' );
		}

		function admin_init() {

			// register settings for sitewide script
			register_setting( 'header-and-footer-scripts', 'shfs_insert_header', 'trim' );
			register_setting( 'header-and-footer-scripts', 'shfs_insert_footer', 'trim' );
			register_setting( 'header-and-footer-scripts', 'shfs_insert_header_priority', 'intval' );
			register_setting( 'header-and-footer-scripts', 'shfs_insert_footer_priority', 'intval' );

			// add meta box to all post types
			foreach ( get_post_types( '', 'names' ) as $type ) {
				add_meta_box('shfs_all_post_meta', esc_html__('Insert Script to &lt;head&gt;', 'header-and-footer-scripts'), 'shfs_meta_setup', $type, 'normal', 'high');
			}

			add_action('save_post','shfs_post_meta_save');
		}

		// adds menu item to wordpress admin dashboard
		function admin_menu() {
			$page = add_submenu_page( 'options-general.php', esc_html__('Header and Footer Scripts', 'header-and-footer-scripts'), esc_html__('Header and Footer Scripts', 'header-and-footer-scripts'), 'manage_options', __FILE__, array( &$this, 'shfs_options_panel' ) );
			}

		function wp_head() {
			$meta = get_option( 'shfs_insert_header', '' );
			if ( $meta != '' ) {
				echo $meta, "\n";
			}

			$shfs_post_meta = get_post_meta( get_the_ID(), '_inpost_head_script' , TRUE );
			if ( is_singular() && $shfs_post_meta != '' ) {
				echo $shfs_post_meta['synth_header_script'], "\n";
			}

		}

		function wp_footer() {
			if ( !is_admin() && !is_feed() && !is_robots() && !is_trackback() ) {
				$text = get_option( 'shfs_insert_footer', '' );
				$text = convert_smilies( $text );
				$text = do_shortcode( $text );

				if ( $text != '' ) {
					echo $text, "\n";
				}
			}
		}

		function shfs_options_panel() {
				// Load options page
				require_once(SHFS_PLUGIN_DIR . '/inc/options.php');
		}
	}

	function shfs_meta_setup() {
		global $post;

		// using an underscore, prevents the meta variable
		// from showing up in the custom fields section
		$meta = get_post_meta($post->ID,'_inpost_head_script',TRUE);

		// instead of writing HTML here, lets do an include
		include_once(SHFS_PLUGIN_DIR . '/inc/meta.php');

		// create a custom nonce for submit verification later
		echo '<input type="hidden" name="shfs_post_meta_noncename" value="' . wp_create_nonce(__FILE__) . '" />';
	}

	function shfs_post_meta_save($post_id) {
		// authentication checks

		// make sure data came from our meta box
		if ( ! isset( $_POST['shfs_post_meta_noncename'] )
			|| !wp_verify_nonce($_POST['shfs_post_meta_noncename'],__FILE__)) return $post_id;

		// check user permissions
		if ( $_POST['post_type'] == 'page' ) {

			if (!current_user_can('edit_page', $post_id))
				return $post_id;

		} else {

			if (!current_user_can('edit_post', $post_id))
				return $post_id;

		}

		$current_data = get_post_meta($post_id, '_inpost_head_script', TRUE);

		$new_data = $_POST['_inpost_head_script'];

		shfs_post_meta_clean($new_data);

		if ($current_data) {

			if (is_null($new_data)) delete_post_meta($post_id,'_inpost_head_script');

			else update_post_meta($post_id,'_inpost_head_script',$new_data);

		} elseif (!is_null($new_data)) {

			add_post_meta($post_id,'_inpost_head_script',$new_data,TRUE);

		}

		return $post_id;
	}

	function shfs_post_meta_clean(&$arr) {

		if (is_array($arr)) {

			foreach ($arr as $i => $v) {

				if (is_array($arr[$i])) {
					shfs_post_meta_clean($arr[$i]);

					if (!count($arr[$i])) {
						unset($arr[$i]);
					}

				} else {

					if (trim($arr[$i]) == '') {
						unset($arr[$i]);
					}
				}
			}

			if (!count($arr)) {
				$arr = NULL;
			}
		}
	}

	$shfs_header_and_footer_scripts = new HeaderAndFooterScripts();
}