<?php
/**
 * @package All-in-One-SEO-Pack
 * @version 2.3.12.2
 */

if ( ! class_exists( 'All_in_One_SEO_Pack_Module' ) ) {

	/**
	 * The module base class; handles settings, options, menus, metaboxes, etc.
	 */
	abstract class All_in_One_SEO_Pack_Module {
		public static $instance = null;
		protected $plugin_name;
		protected $name;
		protected $menu_name;
		protected $prefix;
		protected $file;
		protected $options;
		protected $option_name;
		protected $default_options;
		protected $help_text = array();
		protected $help_anchors = array();
		protected $locations = null;    // organize settings into settings pages with a menu items and/or metaboxes on post types edit screen; optional
		protected $layout = null;        // organize settings on a settings page into multiple, separate metaboxes; optional
		protected $tabs = null;            // organize layouts on a settings page into multiple, separate tabs; optional
		protected $current_tab = null;    // the current tab
		protected $pagehook = null;        // the current page hook
		protected $store_option = false;
		protected $parent_option = 'aioseop_options';
		protected $post_metaboxes = array();
		protected $tabbed_metaboxes = true;
		protected $credentials = false; // used for WP Filesystem
		protected $script_data = null;    // used for passing data to JavaScript
		protected $plugin_path = null;
		protected $pointers = array();
		protected $form = 'dofollow';

		/**
		 * Handles calls to display_settings_page_{$location}, does error checking.
		 *
		 * @param $name
		 * @param $arguments
		 *
		 * @throws Exception
		 */
		function __call( $name, $arguments ) {
			if ( $this->strpos( $name, 'display_settings_page_' ) === 0 ) {
				return $this->display_settings_page( $this->substr( $name, 22 ) );
			}
			$error = __( sprintf( "Method %s doesn't exist", $name ), 'all-in-one-seo-pack' );
			if ( class_exists( 'BadMethodCallException' ) ) {
				throw new BadMethodCallException( $error );
			}
			throw new Exception( $error );
		}

		/**
		 * All_in_One_SEO_Pack_Module constructor.
		 */
		function __construct() {
			if ( empty( $this->file ) ) {
				$this->file = __FILE__;
			}
			$this->plugin_name = AIOSEOP_PLUGIN_NAME;
			$this->plugin_path = array();
//			$this->plugin_path['dir'] = plugin_dir_path( $this->file );
			$this->plugin_path['basename']    = plugin_basename( $this->file );
			$this->plugin_path['dirname']     = dirname( $this->plugin_path['basename'] );
			$this->plugin_path['url']         = plugin_dir_url( $this->file );
			$this->plugin_path['images_url']  = $this->plugin_path['url'] . 'images';
			$this->script_data['plugin_path'] = $this->plugin_path;
		}

		/**
		 * Get options for module, stored individually or together.
		 */
		function get_class_option() {
			$option_name = $this->get_option_name();
			if ( $this->store_option || $option_name == $this->parent_option ) {
				return get_option( $option_name );
			} else {
				$option = get_option( $this->parent_option );
				if ( isset( $option['modules'] ) && isset( $option['modules'][ $option_name ] ) ) {
					return $option['modules'][ $option_name ];
				}
			}

			return false;
		}

		/**
		 * Update options for module, stored individually or together.
		 *
		 * @param      $option_data
		 * @param bool $option_name
		 *
		 * @return bool
		 */
		function update_class_option( $option_data, $option_name = false ) {
			if ( $option_name == false ) {
				$option_name = $this->get_option_name();
			}
			if ( $this->store_option || $option_name == $this->parent_option ) {
				return update_option( $option_name, $option_data );
			} else {
				$option = get_option( $this->parent_option );
				if ( ! isset( $option['modules'] ) ) {
					$option['modules'] = array();
				}
				$option['modules'][ $option_name ] = $option_data;

				return update_option( $this->parent_option, $option );
			}
		}

		/**
		 * Delete options for module, stored individually or together.
		 *
		 * @param bool $delete
		 *
		 * @return bool
		 */
		function delete_class_option( $delete = false ) {
			$option_name = $this->get_option_name();
			if ( $this->store_option || $delete ) {
				delete_option( $option_name );
			} else {
				$option = get_option( $this->parent_option );
				if ( isset( $option['modules'] ) && isset( $option['modules'][ $option_name ] ) ) {
					unset( $option['modules'][ $option_name ] );

					return update_option( $this->parent_option, $option );
				}
			}

			return false;
		}

		/**
		 * Get the option name with prefix.
		 */
		function get_option_name() {
			if ( ! isset( $this->option_name ) || empty( $this->option_name ) ) {
				$this->option_name = $this->prefix . 'options';
			}

			return $this->option_name;
		}

		/**
		 * Convenience function to see if an option is set.
		 *
		 * @param string $option
		 *
		 * @param null   $location
		 *
		 * @return bool
		 */
		function option_isset( $option, $location = null ) {
			$prefix = $this->get_prefix( $location );
			$opt    = $prefix . $option;

			return ( isset( $this->options[ $opt ] ) && $this->options[ $opt ] );
		}

		/*** Case conversion; handle non UTF-8 encodings and fallback **
		 *
		 * @param        $str
		 * @param string $mode
		 *
		 * @return string
		 */

		function convert_case( $str, $mode = 'upper' ) {
			static $charset = null;
			if ( $charset == null ) {
				$charset = get_bloginfo( 'charset' );
			}
			$str = (string) $str;
			if ( $mode == 'title' ) {
				if ( function_exists( 'mb_convert_case' ) ) {
					return mb_convert_case( $str, MB_CASE_TITLE, $charset );
				} else {
					return ucwords( $str );
				}
			}

			if ( $charset == 'UTF-8' ) {
				global $UTF8_TABLES;
				include_once( AIOSEOP_PLUGIN_DIR . 'inc/aioseop_UTF8.php' );
				if ( is_array( $UTF8_TABLES ) ) {
					if ( $mode == 'upper' ) {
						return strtr( $str, $UTF8_TABLES['strtoupper'] );
					}
					if ( $mode == 'lower' ) {
						return strtr( $str, $UTF8_TABLES['strtolower'] );
					}
				}
			}

			if ( $mode == 'upper' ) {
				if ( function_exists( 'mb_strtoupper' ) ) {
					return mb_strtoupper( $str, $charset );
				} else {
					return strtoupper( $str );
				}
			}

			if ( $mode == 'lower' ) {
				if ( function_exists( 'mb_strtolower' ) ) {
					return mb_strtolower( $str, $charset );
				} else {
					return strtolower( $str );
				}
			}

			return $str;
		}

		/**
		 * Convert a string to lower case
		 * Compatible with mb_strtolower(), an UTF-8 friendly replacement for strtolower()
		 *
		 * @param $str
		 *
		 * @return string
		 */
		function strtolower( $str ) {
			return $this->convert_case( $str, 'lower' );
		}

		/**
		 * Convert a string to upper case
		 * Compatible with mb_strtoupper(), an UTF-8 friendly replacement for strtoupper()
		 *
		 * @param $str
		 *
		 * @return string
		 */
		function strtoupper( $str ) {
			return $this->convert_case( $str, 'upper' );
		}

		/**
		 * Convert a string to title case
		 * Compatible with mb_convert_case(), an UTF-8 friendly replacement for ucwords()
		 *
		 * @param $str
		 *
		 * @return string
		 */
		function ucwords( $str ) {
			return $this->convert_case( $str, 'title' );
		}

		/**
		 * Wrapper for strlen() - uses mb_strlen() if possible.
		 *
		 * @param $string
		 *
		 * @return int
		 */
		function strlen( $string ) {
			if ( function_exists( 'mb_strlen' ) ) {
				return mb_strlen( $string );
			}

			return strlen( $string );
		}

		/**
		 * Wrapper for substr() - uses mb_substr() if possible.
		 *
		 * @param     $string
		 * @param int $start
		 * @param int $length
		 *
		 * @return mixed
		 */
		function substr( $string, $start = 0, $length = 2147483647 ) {
			$args = func_get_args();
			if ( function_exists( 'mb_substr' ) ) {
				return call_user_func_array( 'mb_substr', $args );
			}

			return call_user_func_array( 'substr', $args );
		}

		/**
		 * Wrapper for strpos() - uses mb_strpos() if possible.
		 *
		 * @param        $haystack
		 * @param string $needle
		 *
		 * @param int    $offset
		 *
		 * @return bool|int
		 */
		function strpos( $haystack, $needle, $offset = 0 ) {
			if ( function_exists( 'mb_strpos' ) ) {
				return mb_strpos( $haystack, $needle, $offset );
			}

			return strpos( $haystack, $needle, $offset );
		}

		/**
		 * Wrapper for strrpos() - uses mb_strrpos() if possible.
		 *
		 * @param        $haystack
		 * @param string $needle
		 *
		 * @param int    $offset
		 *
		 * @return bool|int
		 */
		function strrpos( $haystack, $needle, $offset = 0 ) {
			if ( function_exists( 'mb_strrpos' ) ) {
				return mb_strrpos( $haystack, $needle, $offset );
			}

			return strrpos( $haystack, $needle, $offset );
		}

		/**
		 * convert xml string to php array - useful to get a serializable value
		 *
		 * @param string $xmlstr
		 *
		 * @return array
		 *
		 * @author Adrien aka Gaarf & contributors
		 * @see    http://gaarf.info/2009/08/13/xml-string-to-php-array/
		 */
		function html_string_to_array( $xmlstr ) {
			if ( ! class_exists( 'DOMDocument' ) ) {
				return array();
			} else {
				$doc = new DOMDocument();
				$doc->loadHTML( $xmlstr );

				return $this->domnode_to_array( $doc->documentElement );
			}
		}

		/**
		 * @param $xmlstr
		 *
		 * @return array|string
		 */
		function xml_string_to_array( $xmlstr ) {
			if ( ! class_exists( 'DOMDocument' ) ) {
				return array();
			} else {
				$doc = new DOMDocument();
				$doc->loadXML( $xmlstr );

				return $this->domnode_to_array( $doc->documentElement );
			}
		}

		/**
		 * @param DOMElement $node
		 *
		 * @return array|string
		 */
		function domnode_to_array( $node ) {
			switch ( $node->nodeType ) {
				case XML_CDATA_SECTION_NODE:
				case XML_TEXT_NODE:
					return trim( $node->textContent );
					break;
				case XML_ELEMENT_NODE:
					$output = array();
					for ( $i = 0, $m = $node->childNodes->length; $i < $m; $i ++ ) {
						$child = $node->childNodes->item( $i );
						$v     = $this->domnode_to_array( $child );
						if ( isset( $child->tagName ) ) {
							$t = $child->tagName;
							if ( ! isset( $output[ $t ] ) ) {
								$output[ $t ] = array();
							}
							if ( is_array( $output ) ) {
								$output[ $t ][] = $v;
							}
						} elseif ( $v || $v === '0' ) {
							$output = (string) $v;
						}
					}
					if ( $node->attributes->length && ! is_array( $output ) ) //Has attributes but isn't an array
					{
						$output = array( '@content' => $output );
					} //Change output into an array.
					if ( is_array( $output ) ) {
						if ( $node->attributes->length ) {
							$a = array();
							foreach ( $node->attributes as $attrName => $attrNode ) {
								$a[ $attrName ] = (string) $attrNode->value;
							}
							$output['@attributes'] = $a;
						}
						foreach ( $output as $t => $v ) {
							if ( is_array( $v ) && count( $v ) == 1 && $t != '@attributes' ) {
								$output[ $t ] = $v[0];
							}
						}
					}
			}
			if ( empty( $output ) ) {
				return '';
			}

			return $output;
		}

		/*** adds support for using %cf_(name of field)% for using custom fields / Advanced Custom Fields in titles / descriptions etc. **
		 *
		 * @param $format
		 *
		 * @return mixed
		 */
		function apply_cf_fields( $format ) {
			return preg_replace_callback( '/%cf_([^%]*?)%/', array( $this, 'cf_field_replace' ), $format );
		}

		/**
		 * @param $matches
		 *
		 * @return bool|mixed|string
		 */
		function cf_field_replace( $matches ) {
			$result = '';
			if ( ! empty( $matches ) ) {
				if ( ! empty( $matches[1] ) ) {
					if ( function_exists( 'get_field' ) ) {
						$result = get_field( $matches[1] );
					}
					if ( empty( $result ) ) {
						global $post;
						if ( ! empty( $post ) ) {
							$result = get_post_meta( $post->ID, $matches[1], true );
						}
					}
					if ( empty( $result ) ) {
						$result = $matches[0];
					}
				} else {
					$result = $matches[0];
				}
			}
			$result = strip_tags( $result );

			return $result;
		}

		/**
		 * Returns child blogs of parent in a multisite.
		 */
		function get_child_blogs() {
			global $wpdb, $blog_id;
			$site_id = $wpdb->siteid;
			if ( is_multisite() ) {
				if ( $site_id != $blog_id ) {
					return false;
				}

				return $wpdb->get_col( "SELECT blog_id FROM {$wpdb->blogs} WHERE site_id = {$blog_id} AND site_id != blog_id" );
			}

			return false;
		}

		/**
		 * Checks if the plugin is active on a given blog by blogid on a multisite.
		 *
		 * @param bool $bid
		 *
		 * @return bool
		 */
		function is_aioseop_active_on_blog( $bid = false ) {
			global $blog_id;
			if ( empty( $bid ) || ( $bid == $blog_id ) || ! is_multisite() ) {
				return true;
			}
			if ( ! function_exists( 'is_plugin_active_for_network' ) ) {
				require_once( ABSPATH . '/wp-admin/includes/plugin.php' );
			}
			if ( is_plugin_active_for_network( AIOSEOP_PLUGIN_BASENAME ) ) {
				return true;
			}

			return in_array( AIOSEOP_PLUGIN_BASENAME, (array) get_blog_option( $bid, 'active_plugins', array() ) );
		}

		/**
		 * @param        $list
		 * @param string $quote
		 *
		 * @return string
		 */
		function quote_list_for_regex( $list, $quote = '/' ) {
			$regex = '';
			$cont  = 0;
			foreach ( $list as $l ) {
				if ( $cont && ! empty( $l ) ) {
					$regex .= '|';
				}
				$cont = 1;
				$regex .= preg_quote( trim( $l ), $quote );
			}

			return $regex;
		}

		// original code thanks to Sean M. Brown -- http://smbrown.wordpress.com/2009/04/29/verify-googlebot-forward-reverse-dns/
		/**
		 * @return bool
		 */
		function is_good_bot() {
			$botlist = array(
				'Yahoo! Slurp' => 'crawl.yahoo.net',
				'googlebot'    => '.googlebot.com',
				'msnbot'       => 'search.msn.com',
			);
			$botlist = apply_filters( $this->prefix . 'botlist', $botlist );
			if ( ! empty( $botlist ) ) {
				if ( ! isset( $_SERVER['HTTP_USER_AGENT'] ) ) {
					return false;
				}
				$ua  = $_SERVER['HTTP_USER_AGENT'];
				$uas = $this->quote_list_for_regex( $botlist );
				if ( preg_match( '/' . $uas . '/i', $ua ) ) {
					$ip             = $_SERVER['REMOTE_ADDR'];
					$hostname       = gethostbyaddr( $ip );
					$ip_by_hostname = gethostbyname( $hostname );
					if ( $ip_by_hostname == $ip ) {
						$hosts = array_values( $botlist );
						foreach ( $hosts as $k => $h ) {
							$hosts[ $k ] = preg_quote( $h ) . '$';
						}
						$hosts = join( '|', $hosts );
						if ( preg_match( '/' . $hosts . '/i', $hostname ) ) {
							return true;
						}
					}
				}

				return false;
			}
		}

		/**
		 * @return array
		 */
		function default_bad_bots() {
			$botlist = array(
				'Abonti',
				'aggregator',
				'AhrefsBot',
				'asterias',
				'BDCbot',
				'BLEXBot',
				'BuiltBotTough',
				'Bullseye',
				'BunnySlippers',
				'ca-crawler',
				'CCBot',
				'Cegbfeieh',
				'CheeseBot',
				'CherryPicker',
				'CopyRightCheck',
				'cosmos',
				'Crescent',
				'discobot',
				'DittoSpyder',
				'DotBot',
				'Download Ninja',
				'EasouSpider',
				'EmailCollector',
				'EmailSiphon',
				'EmailWolf',
				'EroCrawler',
				'Exabot',
				'ExtractorPro',
				'Fasterfox',
				'FeedBooster',
				'Foobot',
				'Genieo',
				'grub-client',
				'Harvest',
				'hloader',
				'httplib',
				'HTTrack',
				'humanlinks',
				'ieautodiscovery',
				'InfoNaviRobot',
				'IstellaBot',
				'Java/1.',
				'JennyBot',
				'k2spider',
				'Kenjin Spider',
				'Keyword Density/0.9',
				'larbin',
				'LexiBot',
				'libWeb',
				'libwww',
				'LinkextractorPro',
				'linko',
				'LinkScan/8.1a Unix',
				'LinkWalker',
				'LNSpiderguy',
				'lwp-trivial',
				'magpie',
				'Mata Hari',
				'MaxPointCrawler',
				'MegaIndex',
				'Microsoft URL Control',
				'MIIxpc',
				'Mippin',
				'Missigua Locator',
				'Mister PiX',
				'MJ12bot',
				'moget',
				'MSIECrawler',
				'NetAnts',
				'NICErsPRO',
				'Niki-Bot',
				'NPBot',
				'Nutch',
				'Offline Explorer',
				'Openfind',
				'panscient.com',
				'PHP/5.{',
				'ProPowerBot/2.14',
				'ProWebWalker',
				'Python-urllib',
				'QueryN Metasearch',
				'RepoMonkey',
				'SemrushBot',
				'SISTRIX',
				'sitecheck.Internetseer.com',
				'SiteSnagger',
				'SnapPreviewBot',
				'Sogou',
				'SpankBot',
				'spanner',
				'spbot',
				'Spinn3r',
				'suzuran',
				'Szukacz/1.4',
				'Teleport',
				'Telesoft',
				'The Intraformant',
				'TheNomad',
				'TightTwatBot',
				'Titan',
				'toCrawl/UrlDispatcher',
				'True_Robot',
				'turingos',
				'TurnitinBot',
				'UbiCrawler',
				'UnisterBot',
				'URLy Warning',
				'VCI',
				'WBSearchBot',
				'Web Downloader/6.9',
				'Web Image Collector',
				'WebAuto',
				'WebBandit',
				'WebCopier',
				'WebEnhancer',
				'WebmasterWorldForumBot',
				'WebReaper',
				'WebSauger',
				'Website Quester',
				'Webster Pro',
				'WebStripper',
				'WebZip',
				'Wotbox',
				'wsr-agent',
				'WWW-Collector-E',
				'Xenu',
				'Zao',
				'Zeus',
				'ZyBORG',
				'coccoc',
				'Incutio',
				'lmspider',
				'memoryBot',
				'SemrushBot',
				'serf',
				'Unknown',
				'uptime files',
			);

			return $botlist;
		}

		/**
		 * @return bool
		 */
		function is_bad_bot() {
			$botlist = $this->default_bad_bots();
			$botlist = apply_filters( $this->prefix . 'badbotlist', $botlist );
			if ( ! empty( $botlist ) ) {
				if ( ! isset( $_SERVER['HTTP_USER_AGENT'] ) ) {
					return false;
				}
				$ua  = $_SERVER['HTTP_USER_AGENT'];
				$uas = $this->quote_list_for_regex( $botlist );
				if ( preg_match( '/' . $uas . '/i', $ua ) ) {
					return true;
				}
			}

			return false;
		}

		/**
		 * @return array
		 */
		function default_bad_referers() {
			$referlist = array(
				'semalt.com',
				'kambasoft.com',
				'savetubevideo.com',
				'buttons-for-website.com',
				'sharebutton.net',
				'soundfrost.org',
				'srecorder.com',
				'softomix.com',
				'softomix.net',
				'myprintscreen.com',
				'joinandplay.me',
				'fbfreegifts.com',
				'openmediasoft.com',
				'zazagames.org',
				'extener.org',
				'openfrost.com',
				'openfrost.net',
				'googlsucks.com',
				'best-seo-offer.com',
				'buttons-for-your-website.com',
				'www.Get-Free-Traffic-Now.com',
				'best-seo-solution.com',
				'buy-cheap-online.info',
				'site3.free-share-buttons.com',
				'webmaster-traffic.com',
			);

			return $referlist;
		}

		/**
		 * @return bool
		 */
		function is_bad_referer() {
			$referlist = $this->default_bad_referers();
			$referlist = apply_filters( $this->prefix . 'badreferlist', $referlist );

			if ( ! empty( $referlist ) && ! empty( $_SERVER ) && ! empty( $_SERVER['HTTP_REFERER'] ) ) {
				$ref   = $_SERVER['HTTP_REFERER'];
				$regex = $this->quote_list_for_regex( $referlist );
				if ( preg_match( '/' . $regex . '/i', $ref ) ) {
					return true;
				}
			}

			return false;
		}

		/**
		 * @return mixed|void
		 */
		function allow_bot() {
			$allow_bot = true;
			if ( ( ! $this->is_good_bot() ) && $this->is_bad_bot() && ! is_user_logged_in() ) {
				$allow_bot = false;
			}

			return apply_filters( $this->prefix . 'allow_bot', $allow_bot );
		}

		/**
		 * Displays tabs for tabbed locations on a settings page.
		 *
		 * @param $location
		 */
		function display_tabs( $location ) {
			if ( ( $location != null ) && isset( $locations[ $location ]['tabs'] ) ) {
				$tabs = $locations['location']['tabs'];
			} else {
				$tabs = $this->tabs;
			}
			if ( ! empty( $tabs ) ) {
				?>
				<div class="aioseop_tabs_div"><label class="aioseop_head_nav">
						<?php
						foreach ( $tabs as $k => $v ) {
							?>
							<a class="aioseop_head_nav_tab aioseop_head_nav_<?php if ( $this->current_tab != $k ) {
								echo 'in';
							} ?>active"
							   href="<?php echo esc_url( add_query_arg( 'tab', $k ) ); ?>"><?php echo $v['name']; ?></a>
							<?php
						}
						?>
					</label></div>
				<?php
			}
		}

		/**
		 * @param $post_objs
		 *
		 * @return array
		 */
		function get_object_labels( $post_objs ) {
			$pt         = array_keys( $post_objs );
			$post_types = array();
			foreach ( $pt as $p ) {
				if ( ! empty( $post_objs[ $p ]->label ) ) {
					$post_types[ $p ] = $post_objs[ $p ]->label;
				} else {
					$post_types[ $p ] = $p;
				}
			}

			return $post_types;
		}

		/**
		 * @param $post_objs
		 *
		 * @return array
		 */
		function get_term_labels( $post_objs ) {
			$post_types = array();
			foreach ( $post_objs as $p ) {
				if ( ! empty( $p->name ) ) {
					$post_types[ $p->term_id ] = $p->name;
				}
			}

			return $post_types;
		}

		/**
		 * @param array $args
		 *
		 * @return array
		 */
		function get_post_type_titles( $args = array() ) {
			return $this->get_object_labels( get_post_types( $args, 'objects' ) );
		}

		/**
		 * @param array $args
		 *
		 * @return array
		 */
		function get_taxonomy_titles( $args = array() ) {
			return $this->get_object_labels( get_taxonomies( $args, 'objects' ) );
		}

		/**
		 * @param array $args
		 *
		 * @return array
		 */
		function get_category_titles( $args = array() ) {
			return $this->get_term_labels( get_categories( $args ) );
		}

		/**
		 * Helper function for exporting settings on post data.
		 *
		 * @param string $prefix
		 * @param array  $query
		 *
		 * @return string
		 */
		function post_data_export( $prefix = '_aioseop', $query = array( 'posts_per_page' => - 1 ) ) {
			$buf         = '';
			$posts_query = new WP_Query( $query );
			while ( $posts_query->have_posts() ) {
				$posts_query->the_post();
				global $post;
				$guid               = $post->guid;
				$type               = $post->post_type;
				$title              = $post->post_title;
				$date               = $post->post_date;
				$data               = '';
				$post_custom_fields = get_post_custom( $post->ID );
				$has_data           = null;

				if ( is_array( $post_custom_fields ) ) {
					foreach ( $post_custom_fields as $field_name => $field ) {
						if ( ( $this->strpos( $field_name, $prefix ) === 0 ) && $field[0] ) {
							$has_data = true;
							$data .= $field_name . " = '" . $field[0] . "'\n";
						}
					}
				}
				if ( ! empty( $data ) ) {
					$has_data = true;
				}

				if ( $has_data != null ) {
					$post_info = "\n[post_data]\n\n";
					$post_info .= "post_title = '" . $title . "'\n";
					$post_info .= "post_guid = '" . $guid . "'\n";
					$post_info .= "post_date = '" . $date . "'\n";
					$post_info .= "post_type = '" . $type . "'\n";
					if ( $data ) {
						$buf .= $post_info . $data . "\n";
					}
				}
			}
			wp_reset_postdata();

			return $buf;
		}

		/**
		 * Handles exporting settings data for a module.
		 *
		 * @param $buf
		 *
		 * @return string
		 */
		function settings_export( $buf ) {
			global $aiosp;
			$post_types       = null;
			$has_data         = null;
			$general_settings = null;
			$exporter_choices = '';
			if ( ! empty( $_REQUEST['aiosp_importer_exporter_export_choices'] ) ) {
				$exporter_choices = $_REQUEST['aiosp_importer_exporter_export_choices'];
			}
			if ( ! empty( $exporter_choices ) && is_array( $exporter_choices ) ) {
				foreach ( $exporter_choices as $ex ) {
					if ( $ex == 1 ) {
						$general_settings = true;
					}
					if ( $ex == 2 && isset( $_REQUEST['aiosp_importer_exporter_export_post_types'] ) ) {
						$post_types = $_REQUEST['aiosp_importer_exporter_export_post_types'];
					}
				}
			}

			if ( ( $post_types != null ) && ( $this === $aiosp ) ) {
				$buf .= $this->post_data_export( '_aioseop', array(
					'posts_per_page' => - 1,
					'post_type'      => $post_types,
				) );
			}

			/* Add all active settings to settings file */
			$name    = $this->get_option_name();
			$options = $this->get_class_option();
			if ( ! empty( $options ) && $general_settings != null ) {
				$buf .= "\n[$name]\n\n";
				foreach ( $options as $key => $value ) {
					if ( ( $name == $this->parent_option ) && ( $key == 'modules' ) ) {
						continue;
					} // don't re-export all module settings -- pdb
					if ( is_array( $value ) ) {
						$value = "'" . str_replace( array( "'", "\n", "\r" ), array(
								"\'",
								'\n',
								'\r',
							), trim( serialize( $value ) ) ) . "'";
					} else {
						$value = str_replace( array( "\n", "\r" ), array(
							'\n',
							'\r',
						), trim( var_export( $value, true ) ) );
					}
					$buf .= "$key = $value\n";
				}
			}

			return $buf;
		}

		/**
		 * Order for adding the menus for the aioseop_modules_add_menus hook.
		 */
		function menu_order() {
			return 10;
		}

		/**
		 * Print a basic error message.
		 *
		 * @param $error
		 *
		 * @return bool
		 */
		function output_error( $error ) {
			echo "<div class='aioseop_module error'>$error</div>";

			return false;
		}

		/***
		 * Backwards compatibility - see http://php.net/manual/en/function.str-getcsv.php
		 *
		 * @param        $input
		 * @param string $delimiter
		 * @param string $enclosure
		 * @param string $escape
		 *
		 * @return array
		 */
		function str_getcsv( $input, $delimiter = ',', $enclosure = '"', $escape = "\\" ) {
			$fp = fopen( 'php://memory', 'r+' );
			fputs( $fp, $input );
			rewind( $fp );
			$data = fgetcsv( $fp, null, $delimiter, $enclosure ); // $escape only got added in 5.3.0
			fclose( $fp );

			return $data;
		}

		/***
		 * Helper function to convert csv in key/value pair format to an associative array.
		 *
		 * @param $csv
		 *
		 * @return array
		 */
		function csv_to_array( $csv ) {
			$args = array();
			if ( ! function_exists( 'str_getcsv' ) ) {
				$v = $this->str_getcsv( $csv );
			} else {
				$v = str_getcsv( $csv );
			}
			$size = count( $v );
			if ( is_array( $v ) && isset( $v[0] ) && $size >= 2 ) {
				for ( $i = 0; $i < $size; $i += 2 ) {
					$args[ $v[ $i ] ] = $v[ $i + 1 ];
				}
			}

			return $args;
		}

		/** Allow modules to use WP Filesystem if available and desired, fall back to PHP filesystem access otherwise.
		 *
		 * @param string $method
		 * @param bool   $form_fields
		 * @param string $url
		 * @param bool   $error
		 *
		 * @return bool
		 */
		function use_wp_filesystem( $method = '', $form_fields = false, $url = '', $error = false ) {
			if ( empty( $method ) ) {
				$this->credentials = request_filesystem_credentials( $url );
			} else {
				$this->credentials = request_filesystem_credentials( $url, $method, $error, false, $form_fields );
			}

			return $this->credentials;
		}

		/**
		 * Wrapper function to get filesystem object.
		 */
		function get_filesystem_object() {
			$cred = get_transient( 'aioseop_fs_credentials' );
			if ( ! empty( $cred ) ) {
				$this->credentials = $cred;
			}

			if ( function_exists( 'WP_Filesystem' ) && WP_Filesystem( $this->credentials ) ) {
				global $wp_filesystem;

				return $wp_filesystem;
			} else {
				require_once( ABSPATH . 'wp-admin/includes/template.php' );
				require_once( ABSPATH . 'wp-admin/includes/screen.php' );
				require_once( ABSPATH . 'wp-admin/includes/file.php' );

				if ( ! WP_Filesystem( $this->credentials ) ) {
					$this->use_wp_filesystem();
				}

				if ( ! empty( $this->credentials ) ) {
					set_transient( 'aioseop_fs_credentials', $this->credentials, 10800 );
				}
				global $wp_filesystem;
				if ( is_object( $wp_filesystem ) ) {
					return $wp_filesystem;
				}
			}

			return false;
		}

		/**
		 * See if a file exists using WP Filesystem.
		 *
		 * @param string $filename
		 *
		 * @return bool
		 */
		function file_exists( $filename ) {
			$wpfs = $this->get_filesystem_object();
			if ( is_object( $wpfs ) ) {
				return $wpfs->exists( $filename );
			}

			return $wpfs;
		}

		/**
		 * See if the directory entry is a file using WP Filesystem.
		 *
		 * @param $filename
		 *
		 * @return bool
		 */
		function is_file( $filename ) {
			$wpfs = $this->get_filesystem_object();
			if ( is_object( $wpfs ) ) {
				return $wpfs->is_file( $filename );
			}

			return $wpfs;
		}

		/**
		 * List files in a directory using WP Filesystem.
		 *
		 * @param $path
		 *
		 * @return array|bool
		 */
		function scandir( $path ) {
			$wpfs = $this->get_filesystem_object();
			if ( is_object( $wpfs ) ) {
				$dirlist = $wpfs->dirlist( $path );
				if ( empty( $dirlist ) ) {
					return $dirlist;
				}

				return array_keys( $dirlist );
			}

			return $wpfs;
		}

		/**
		 * Load a file through WP Filesystem; implement basic support for offset and maxlen.
		 *
		 * @param      $filename
		 * @param bool $use_include_path
		 * @param null $context
		 * @param int  $offset
		 * @param int  $maxlen
		 *
		 * @return bool|mixed
		 */
		function load_file( $filename, $use_include_path = false, $context = null, $offset = - 1, $maxlen = - 1 ) {
			$wpfs = $this->get_filesystem_object();
			if ( is_object( $wpfs ) ) {
				if ( ! $wpfs->exists( $filename ) ) {
					return false;
				}
				if ( ( $offset > 0 ) || ( $maxlen >= 0 ) ) {
					if ( $maxlen === 0 ) {
						return '';
					}
					if ( $offset < 0 ) {
						$offset = 0;
					}
					$file = $wpfs->get_contents( $filename );
					if ( ! is_string( $file ) || empty( $file ) ) {
						return $file;
					}
					if ( $maxlen < 0 ) {
						return $this->substr( $file, $offset );
					} else {
						return $this->substr( $file, $offset, $maxlen );
					}
				} else {
					return $wpfs->get_contents( $filename );
				}
			}

			return false;
		}

		/**
		 * Save a file through WP Filesystem.
		 *
		 * @param string $filename
		 *
		 * @param        $contents
		 *
		 * @return bool
		 */
		function save_file( $filename, $contents ) {
			$failed_str   = __( sprintf( "Failed to write file %s!\n", $filename ), 'all-in-one-seo-pack' );
			$readonly_str = __( sprintf( "File %s isn't writable!\n", $filename ), 'all-in-one-seo-pack' );
			$wpfs         = $this->get_filesystem_object();
			if ( is_object( $wpfs ) ) {
				$file_exists = $wpfs->exists( $filename );
				if ( ! $file_exists || $wpfs->is_writable( $filename ) ) {
					if ( $wpfs->put_contents( $filename, $contents ) === false ) {
						return $this->output_error( $failed_str );
					}
				} else {
					return $this->output_error( $readonly_str );
				}

				return true;
			}

			return false;
		}

		/**
		 * Delete a file through WP Filesystem.
		 *
		 * @param string $filename
		 *
		 * @return bool
		 */
		function delete_file( $filename ) {
			$wpfs = $this->get_filesystem_object();
			if ( is_object( $wpfs ) ) {
				if ( $wpfs->exists( $filename ) ) {
					if ( $wpfs->delete( $filename ) === false ) {
						$this->output_error( __( sprintf( "Failed to delete file %s!\n", $filename ), 'all-in-one-seo-pack' ) );
					} else {
						return true;
					}
				} else {
					$this->output_error( __( sprintf( "File %s doesn't exist!\n", $filename ), 'all-in-one-seo-pack' ) );
				}
			}

			return false;
		}

		/**
		 * Rename a file through WP Filesystem.
		 *
		 * @param string $filename
		 * @param string $newname
		 *
		 * @return bool
		 */
		function rename_file( $filename, $newname ) {
			$wpfs = $this->get_filesystem_object();
			if ( is_object( $wpfs ) ) {
				$file_exists    = $wpfs->exists( $filename );
				$newfile_exists = $wpfs->exists( $newname );
				if ( $file_exists && ! $newfile_exists ) {
					if ( $wpfs->move( $filename, $newname ) === false ) {
						$this->output_error( __( sprintf( "Failed to rename file %s!\n", $filename ), 'all-in-one-seo-pack' ) );
					} else {
						return true;
					}
				} else {
					if ( ! $file_exists ) {
						$this->output_error( __( sprintf( "File %s doesn't exist!\n", $filename ), 'all-in-one-seo-pack' ) );
					} elseif ( $newfile_exists ) {
						$this->output_error( __( sprintf( "File %s already exists!\n", $newname ), 'all-in-one-seo-pack' ) );
					}
				}
			}

			return false;
		}

		/**
		 * Load multiple files.
		 *
		 * @param $options
		 * @param $opts
		 * @param $prefix
		 *
		 * @return mixed
		 */
		function load_files( $options, $opts, $prefix ) {
			foreach ( $opts as $opt => $file ) {
				$opt      = $prefix . $opt;
				$file     = ABSPATH . $file;
				$contents = $this->load_file( $file );
				if ( $contents !== false ) {
					$options[ $opt ] = $contents;
				}
			}

			return $options;
		}

		/**
		 * Save multiple files.
		 *
		 * @param $opts
		 * @param $prefix
		 */
		function save_files( $opts, $prefix ) {
			foreach ( $opts as $opt => $file ) {
				$opt = $prefix . $opt;
				if ( isset( $_POST[ $opt ] ) ) {
					$output = stripslashes_deep( $_POST[ $opt ] );
					$file   = ABSPATH . $file;
					$this->save_file( $file, $output );
				}
			}
		}

		/**
		 * Delete multiple files.
		 *
		 * @param $opts
		 */
		function delete_files( $opts ) {
			foreach ( $opts as $opt => $file ) {
				$file = ABSPATH . $file;
				$this->delete_file( $file );
			}
		}

		/**
		 * @param null $options
		 * @param null $p
		 *
		 * @return array
		 */
		function get_all_images_by_type( $options = null, $p = null ) {
			$img = array();
			if ( empty( $img ) ) {
				$size = apply_filters( 'post_thumbnail_size', 'large' );

				global $aioseop_options, $wp_query, $aioseop_opengraph;

				if ( $p === null ) {
					global $post;
				} else {
					$post = $p;
				}

				$count = 1;

				if ( ! empty( $post ) ) {
					if ( ! is_object( $post ) ) {
						$post = get_post( $post );
					}
					if ( is_object( $post ) && function_exists( 'get_post_thumbnail_id' ) ) {
						if ( $post->post_type == 'attachment' ) {
							$post_thumbnail_id = $post->ID;
						} else {
							$post_thumbnail_id = get_post_thumbnail_id( $post->ID );
						}
						if ( ! empty( $post_thumbnail_id ) ) {
							$image = wp_get_attachment_image_src( $post_thumbnail_id, $size );
							if ( is_array( $image ) ) {
								$img[] = array( 'type' => 'featured', 'id' => $post_thumbnail_id, 'link' => $image[0] );
							}
						}
					}

					$post_id = $post->ID;
					$p       = $post;
					$w       = $wp_query;

					$meta_key = '';
					if ( is_array( $options ) && isset( $options['meta_key'] ) ) {
						$meta_key = $options['meta_key'];
					}

					if ( ! empty( $meta_key ) && ! empty( $post ) ) {
						$meta_key = explode( ',', $meta_key );
						$image    = $this->get_the_image_by_meta_key( array(
							'post_id'  => $post->ID,
							'meta_key' => $meta_key,
						) );
						if ( ! empty( $image ) ) {
							$img[] = array( 'type' => 'meta_key', 'id' => $meta_key, 'link' => $image );
						}
					}

					if ( ! $post->post_modified_gmt != '' ) {
						$wp_query = new WP_Query( array( 'p' => $post_id, 'post_type' => $post->post_type ) );
					}
					if ( $post->post_type == 'page' ) {
						$wp_query->is_page = true;
					} elseif ( $post->post_type == 'attachment' ) {
						$wp_query->is_attachment = true;
					} else {
						$wp_query->is_single = true;
					}
					if ( get_option( 'show_on_front' ) == 'page' && $post->ID == get_option( 'page_for_posts' ) ) {
						$wp_query->is_home = true;
					}
					$args['options']['type']   = 'html';
					$args['options']['nowrap'] = false;
					$args['options']['save']   = false;
					$wp_query->queried_object  = $post;

					$attachments = get_children( array(
						'post_parent'    => $post->ID,
						'post_status'    => 'inherit',
						'post_type'      => 'attachment',
						'post_mime_type' => 'image',
						'order'          => 'ASC',
						'orderby'        => 'menu_order ID',
					) );
					if ( ! empty( $attachments ) ) {
						foreach ( $attachments as $id => $attachment ) {
							$image = wp_get_attachment_image_src( $id, $size );
							if ( is_array( $image ) ) {
								$img[] = array( 'type' => 'attachment', 'id' => $id, 'link' => $image[0] );
							}
						}
					}
					$matches = array();
					preg_match_all( '|<img.*?src=[\'"](.*?)[\'"].*?>|i', get_post_field( 'post_content', $post->ID ), $matches );
					if ( isset( $matches ) && ! empty( $matches[1] ) && ! empty( $matches[1][0] ) ) {
						foreach ( $matches[1] as $i => $m ) {
							$img[] = array( 'type' => 'post_content', 'id' => 'post' . $count ++, 'link' => $m );
						}
					}
					wp_reset_postdata();
					$wp_query = $w;
					$post     = $p;
				}
			}

			return $img;
		}

		/**
		 * @param null $options
		 * @param null $p
		 *
		 * @return array
		 */
		function get_all_images( $options = null, $p = null ) {
			$img    = $this->get_all_images_by_type( $options, $p );
			$legacy = array();
			foreach ( $img as $k => $v ) {
				$v['link'] = set_url_scheme($v['link']);
				if ( $v['type'] == 'featured' ) {
					$legacy[ $v['link'] ] = 1;
				} else {
					$legacy[ $v['link'] ] = $v['id'];
				}
			}

			return $legacy;
		}

		/*** Thanks to Justin Tadlock for the original get-the-image code - http://themehybrid.com/plugins/get-the-image **
		 *
		 * @param null $options
		 * @param null $p
		 *
		 * @return bool|mixed|string
		 */

		function get_the_image( $options = null, $p = null ) {

			if ( $p === null ) {
				global $post;
			} else {
				$post = $p;
			}

			$meta_key = '';
			if ( is_array( $options ) && isset( $options['meta_key'] ) ) {
				$meta_key = $options['meta_key'];
			}

			if ( ! empty( $meta_key ) && ! empty( $post ) ) {
				$meta_key = explode( ',', $meta_key );
				$image    = $this->get_the_image_by_meta_key( array(
					'post_id'  => $post->ID,
					'meta_key' => $meta_key,
				) );
			}
			if ( empty( $image ) ) {
				$image = $this->get_the_image_by_post_thumbnail( $post );
			}
			if ( empty( $image ) ) {
				$image = $this->get_the_image_by_attachment( $post );
			}
			if ( empty( $image ) ) {
				$image = $this->get_the_image_by_scan( $post );
			}
			if ( empty( $image ) ) {
				$image = $this->get_the_image_by_default( $post );
			}

			return $image;
		}

		/**
		 * @param null $p
		 *
		 * @return string
		 */
		function get_the_image_by_default( $p = null ) {
			return '';
		}

		/**
		 * @param array $args
		 *
		 * @return bool|mixed
		 */
		function get_the_image_by_meta_key( $args = array() ) {

			/* If $meta_key is not an array. */
			if ( ! is_array( $args['meta_key'] ) ) {
				$args['meta_key'] = array( $args['meta_key'] );
			}

			/* Loop through each of the given meta keys. */
			foreach ( $args['meta_key'] as $meta_key ) {
				/* Get the image URL by the current meta key in the loop. */
				$image = get_post_meta( $args['post_id'], $meta_key, true );
				/* If a custom key value has been given for one of the keys, return the image URL. */
				if ( ! empty( $image ) ) {
					return $image;
				}
			}

			return false;
		}

		/**
		 * @param null $p
		 *
		 * @return bool
		 */
		function get_the_image_by_post_thumbnail( $p = null ) {

			if ( $p === null ) {
				global $post;
			} else {
				$post = $p;
			}

			$post_thumbnail_id = null;
			if ( function_exists( 'get_post_thumbnail_id' ) ) {
				$post_thumbnail_id = get_post_thumbnail_id( $post->ID );
			}

			if ( empty( $post_thumbnail_id ) ) {
				return false;
			}

			$size  = apply_filters( 'post_thumbnail_size', 'large' ); // Check if someone is using built-in WP filter.
			$size  = apply_filters( 'aioseop_thumbnail_size', $size );
			$image = wp_get_attachment_image_src( $post_thumbnail_id, $size );

			return $image[0];
		}

		/**
		 * @param null $p
		 *
		 * @return bool
		 */
		function get_the_image_by_attachment( $p = null ) {

			if ( $p === null ) {
				global $post;
			} else {
				$post = $p;
			}

			$attachments = get_children( array(
				'post_parent'    => $post->ID,
				'post_status'    => 'inherit',
				'post_type'      => 'attachment',
				'post_mime_type' => 'image',
				'order'          => 'ASC',
				'orderby'        => 'menu_order ID',
			) );

			if ( empty( $attachments ) && 'attachment' == get_post_type( $post->ID ) ) {
				$size  = 'large';
				$size  = apply_filters( 'aioseop_attachment_size', $size );
				$image = wp_get_attachment_image_src( $post->ID, $size );
			}

			/* If no attachments or image is found, return false. */
			if ( empty( $attachments ) && empty( $image ) ) {
				return false;
			}

			/* Set the default iterator to 0. */
			$i = 0;

			/* Loop through each attachment. Once the $order_of_image (default is '1') is reached, break the loop. */
			foreach ( $attachments as $id => $attachment ) {
				if ( ++ $i == 1 ) {
					$size  = 'large';
					$size  = apply_filters( 'aioseop_attachment_size', $size );
					$image = wp_get_attachment_image_src( $id, $size );
					$alt   = trim( strip_tags( get_post_field( 'post_excerpt', $id ) ) );
					break;
				}
			}

			/* Return the image URL. */

			return $image[0];

		}

		/**
		 * @param null $p
		 *
		 * @return bool
		 */
		function get_the_image_by_scan( $p = null ) {

			if ( $p === null ) {
				global $post;
			} else {
				$post = $p;
			}

			/* Search the post's content for the <img /> tag and get its URL. */
			preg_match_all( '|<img.*?src=[\'"](.*?)[\'"].*?>|i', get_post_field( 'post_content', $post->ID ), $matches );

			/* If there is a match for the image, return its URL. */
			if ( isset( $matches ) && ! empty( $matches[1][0] ) ) {
				return $matches[1][0];
			}

			return false;
		}

		/**
		 * @param        $default_options
		 * @param        $options
		 * @param string $help_link
		 */
		function help_text_helper( &$default_options, $options, $help_link = '' ) {
			foreach ( $options as $o ) {
				$ht = '';
				if ( ! empty( $this->help_text[ $o ] ) ) {
					$ht = $this->help_text[ $o ];
				} elseif ( ! empty( $default_options[ $o ]['help_text'] ) ) {
					$ht = $default_options[ $o ]['help_text'];
				}
				if ( $ht && ! is_array( $ht ) ) {
					$ha = '';
					$hl = $help_link;
					if ( strpos( $o, 'ga_' ) === 0 ) { // special case -- pdb
						$hl = 'https://semperplugins.com/documentation/advanced-google-analytics-settings/';
					}
					if ( ! empty( $this->help_anchors[ $o ] ) ) {
						$ha = $this->help_anchors[ $o ];
					}
					if ( ! empty( $ha ) && ( $pos = strrpos( $hl, '#' ) ) ) {
						$hl = substr( $hl, 0, $pos );
					}
					if ( ! empty( $ha ) && ( $ha[0] == 'h' ) ) {
						$hl = '';
					}
					if ( ! empty( $ha ) || ! isset( $this->help_anchors[ $o ] ) ) {
						$ht .= "<br /><a href='" . $hl . $ha . "' target='_blank'>" . __( 'Click here for documentation on this setting', 'all-in-one-seo-pack' ) . '</a>';
					}
					$default_options[ $o ]['help_text'] = $ht;
				}
			}
		}

		function add_help_text_links() {
			if ( ! empty( $this->help_text ) ) {
				foreach ( $this->layout as $k => $v ) {
					$this->help_text_helper( $this->default_options, $v['options'], $v['help_link'] );
				}
				if ( ! empty( $this->locations ) ) {
					foreach ( $this->locations as $k => $v ) {
						if ( ! empty( $v['default_options'] ) && ! empty( $v['options'] ) ) {
							$this->help_text_helper( $this->locations[ $k ]['default_options'], $v['options'], $v['help_link'] );
						}
					}
				}
			}
		}

		/**
		 * Load scripts and styles for metaboxes.
		 *
		 * edit-tags exists only for pre 4.5 support... remove when we drop 4.5 support.
		 * Also, that check and others should be pulled out into their own functions
		 */
		function enqueue_metabox_scripts() {
			$screen = '';
			if ( function_exists( 'get_current_screen' ) ) {
				$screen = get_current_screen();
			}
			$bail = false;
			if ( empty( $screen ) ) {
				$bail = true;
			}
			if ( $bail != true ) {
				if ( ( $screen->base != 'post' ) && ( $screen->base != 'term' ) && ( $screen->base != 'edit-tags' ) && ( $screen->base != 'toplevel_page_shopp-products' ) ) {
					$bail = true;
				}
			}
			$prefix = $this->get_prefix();
			$bail   = apply_filters( $prefix . 'bail_on_enqueue', $bail, $screen );
			if ( $bail ) {
				return;
			}
			$this->form = 'post';
			if ( $screen->base == 'term' || $screen->base == 'edit-tags' ) {
				$this->form = 'edittag';
			}
			if ( $screen->base == 'toplevel_page_shopp-products' ) {
				$this->form = 'product';
			}
			$this->form = apply_filters( $prefix . 'set_form_on_enqueue', $this->form, $screen );
			foreach ( $this->locations as $k => $v ) {
				if ( $v['type'] === 'metabox' && isset( $v['display'] ) && ! empty( $v['display'] ) ) {
					$enqueue_scripts = false;
					$enqueue_scripts = ( ( ( $screen->base == 'toplevel_page_shopp-products' ) && in_array( 'shopp_product', $v['display'] ) ) ) || in_array( $screen->post_type, $v['display'] );
					$enqueue_scripts = apply_filters( $prefix . 'enqueue_metabox_scripts', $enqueue_scripts, $screen, $v );
					if ( $enqueue_scripts ) {
						add_filter( 'aioseop_localize_script_data', array( $this, 'localize_script_data' ) );
						add_action( 'admin_print_scripts', array( $this, 'enqueue_scripts' ), 20 );
						add_action( 'admin_print_scripts', array( $this, 'enqueue_styles' ), 20 );
						add_action( 'admin_enqueue_scripts', array( $this, 'admin_enqueue_scripts' ), 20 );
					}
				}
			}
		}

		function admin_enqueue_scripts(){
			wp_enqueue_media(); // WP 3.5+ Media upload.
		}

		/**
		 * Load styles for module.
		 */
		function enqueue_styles() {
			wp_enqueue_style( 'thickbox' );
			if ( ! empty( $this->pointers ) ) {
				wp_enqueue_style( 'wp-pointer' );
			}
			wp_enqueue_style( 'aioseop-module-style', AIOSEOP_PLUGIN_URL . 'css/modules/aioseop_module.css', array(), AIOSEOP_VERSION );
			if ( function_exists( 'is_rtl' ) && is_rtl() ) {
				wp_enqueue_style( 'aioseop-module-style-rtl', AIOSEOP_PLUGIN_URL . 'css/modules/aioseop_module-rtl.css', array( 'aioseop-module-style' ), AIOSEOP_VERSION );
			}
		}

		/**
		 * Load scripts for module, can pass data to module script.
		 * @since 2.3.12.3 Add missing wp_enqueue_media.
		 */
		function enqueue_scripts() {
			wp_enqueue_script( 'sack' );
			wp_enqueue_script( 'jquery' );
			wp_enqueue_script( 'media-upload' );
			wp_enqueue_script( 'thickbox' );
			wp_enqueue_script( 'common' );
			wp_enqueue_script( 'wp-lists' );
			wp_enqueue_script( 'postbox' );
			if ( ! empty( $this->pointers ) ) {
				wp_enqueue_script( 'wp-pointer', false, array( 'jquery' ) );
			}
			global $post;
			if( !empty( $post->ID) ) {
				wp_enqueue_media( array( 'post' => $post->ID ) );
			}else{
				wp_enqueue_media();
            }
			wp_enqueue_script( 'aioseop-module-script', AIOSEOP_PLUGIN_URL . 'js/modules/aioseop_module.js', array(), AIOSEOP_VERSION );
			if ( ! empty( $this->script_data ) ) {
				aioseop_localize_script_data();
			}
		}

		/**
		 * @param $data
		 *
		 * @return array
		 */
		function localize_script_data( $data ) {
			if ( ! is_array( $data ) ) {
				$data = array( 0 => $data );
			}
			if ( empty( $this->script_data ) ) {
				$this->script_data = array();
			}
			if ( ! empty( $this->pointers ) ) {
				$this->script_data['pointers'] = $this->pointers;
			}
			if ( empty( $data[0]['condshow'] ) ) {
				$data[0]['condshow'] = array();
			}
			if ( empty( $this->script_data['condshow'] ) ) {
				$this->script_data['condshow'] = array();
			}
			$condshow            = $this->script_data['condshow'];
			$data[0]['condshow'] = array_merge( $data[0]['condshow'], $condshow );
			unset( $this->script_data['condshow'] );
			$data[0]                       = array_merge( $this->script_data, $data[0] );
			$this->script_data['condshow'] = $condshow;

			return $data;
		}

		/**
		 * Override this to run code at the beginning of the settings page.
		 */
		function settings_page_init() {

		}

		/**
		 * Filter out admin pointers that have already been clicked.
		 */
		function filter_pointers() {
			if ( ! empty( $this->pointers ) ) {
				$dismissed = explode( ',', (string) get_user_meta( get_current_user_id(), 'dismissed_wp_pointers', true ) );
				foreach ( $dismissed as $d ) {
					if ( isset( $this->pointers[ $d ] ) ) {
						unset( $this->pointers[ $d ] );
					}
				}
			}
		}

		/**
		 * Add basic hooks when on the module's page.
		 */
		function add_page_hooks() {
			$hookname = current_filter();
			if ( $this->strpos( $hookname, 'load-' ) === 0 ) {
				$this->pagehook = $this->substr( $hookname, 5 );
			}
			add_action( 'admin_print_scripts', array( $this, 'enqueue_scripts' ) );
			add_action( 'admin_print_styles', array( $this, 'enqueue_styles' ) );
			add_filter( 'aioseop_localize_script_data', array( $this, 'localize_script_data' ) );
			add_action( $this->prefix . 'settings_header', array( $this, 'display_tabs' ) );
		}

		/**
		 * @return array
		 */
		function get_admin_links() {
			if ( ! empty( $this->menu_name ) ) {
				$name = $this->menu_name;
			} else {
				$name = $this->name;
			}

			$hookname = plugin_basename( $this->file );

			$links = array();
			$url   = '';
			if ( function_exists( 'menu_page_url' ) ) {
				$url = menu_page_url( $hookname, 0 );
			}
			if ( empty( $url ) ) {
				$url = esc_url( admin_url( 'admin.php?page=' . $hookname ) );
			}

			if ( $this->locations === null ) {
				array_unshift( $links, array(
					'parent' => AIOSEOP_PLUGIN_DIRNAME,
					'title'  => $name,
					'id'     => $hookname,
					'href'   => $url,
					'order'  => $this->menu_order(),
				) );
			} else {
				foreach ( $this->locations as $k => $v ) {
					if ( $v['type'] === 'settings' ) {
						if ( $k === 'default' ) {
							array_unshift( $links, array(
								'parent' => AIOSEOP_PLUGIN_DIRNAME,
								'title'  => $name,
								'id'     => $hookname,
								'href'   => $url,
								'order'  => $this->menu_order(),
							) );
						} else {
							if ( ! empty( $v['menu_name'] ) ) {
								$name = $v['menu_name'];
							} else {
								$name = $v['name'];
							}
							array_unshift( $links, array(
								'parent' => AIOSEOP_PLUGIN_DIRNAME,
								'title'  => $name,
								'id'     => $this->get_prefix( $k ) . $k,
								'href'   => esc_url( admin_url( 'admin.php?page=' . $this->get_prefix( $k ) . $k ) ),
								'order'  => $this->menu_order(),
							) );
						}
					}
				}
			}

			return $links;
		}

		function add_admin_bar_submenu() {
			global $aioseop_admin_menu, $wp_admin_bar;

			if ( $aioseop_admin_menu ) {
				$links = $this->get_admin_links();
				if ( ! empty( $links ) ) {
					foreach ( $links as $l ) {
						$wp_admin_bar->add_menu( $l );
					}
				}
			}
		}

		/**
		 * Collect metabox data together for tabbed metaboxes.
		 *
		 * @param $args
		 *
		 * @return array
		 */
		function filter_return_metaboxes( $args ) {
			return array_merge( $args, $this->post_metaboxes );
		}

		/** Add submenu for module, call page hooks, set up metaboxes.
		 *
		 * @param $parent_slug
		 *
		 * @return bool
		 */
		function add_menu( $parent_slug ) {
			if ( ! empty( $this->menu_name ) ) {
				$name = $this->menu_name;
			} else {
				$name = $this->name;
			}
			if ( $this->locations === null ) {
				$hookname = add_submenu_page( $parent_slug, $name, $name, apply_filters( 'manage_aiosp', 'aiosp_manage_seo' ), plugin_basename( $this->file ), array(
					$this,
					'display_settings_page',
				) );
				add_action( "load-{$hookname}", array( $this, 'add_page_hooks' ) );

				return true;
			}
			foreach ( $this->locations as $k => $v ) {
				if ( $v['type'] === 'settings' ) {
					if ( $k === 'default' ) {
						if ( ! empty( $this->menu_name ) ) {
							$name = $this->menu_name;
						} else {
							$name = $this->name;
						}
						$hookname = add_submenu_page( $parent_slug, $name, $name, apply_filters( 'manage_aiosp', 'aiosp_manage_seo' ), plugin_basename( $this->file ), array(
							$this,
							'display_settings_page',
						) );
					} else {
						if ( ! empty( $v['menu_name'] ) ) {
							$name = $v['menu_name'];
						} else {
							$name = $v['name'];
						}
						$hookname = add_submenu_page( $parent_slug, $name, $name, apply_filters( 'manage_aiosp', 'aiosp_manage_seo' ), $this->get_prefix( $k ) . $k, array(
							$this,
							"display_settings_page_$k",
						) );
					}
					add_action( "load-{$hookname}", array( $this, 'add_page_hooks' ) );
				} elseif ( $v['type'] === 'metabox' ) {
					$this->setting_options( $k ); // hack -- make sure this runs anyhow, for now -- pdb
					add_action( 'edit_post', array( $this, 'save_post_data' ) );
					add_action( 'publish_post', array( $this, 'save_post_data' ) );
					add_action( 'add_attachment', array( $this, 'save_post_data' ) );
					add_action( 'edit_attachment', array( $this, 'save_post_data' ) );
					add_action( 'save_post', array( $this, 'save_post_data' ) );
					add_action( 'edit_page_form', array( $this, 'save_post_data' ) );
					if ( isset( $v['display'] ) && ! empty( $v['display'] ) ) {
						add_action( 'admin_print_scripts', array( $this, 'enqueue_metabox_scripts' ), 5 );
						if ( $this->tabbed_metaboxes ) {
							add_filter( 'aioseop_add_post_metabox', array( $this, 'filter_return_metaboxes' ) );
						}
						foreach ( $v['display'] as $posttype ) {
							$v['location'] = $k;
							$v['posttype'] = $posttype;
							if ( ! isset( $v['context'] ) ) {
								$v['context'] = 'advanced';
							}
							if ( ! isset( $v['priority'] ) ) {
								$v['priority'] = 'default';
							}
							if ( $this->tabbed_metaboxes ) {
								$this->post_metaboxes[] = array(
									'id'            => $v['prefix'] . $k,
									'title'         => $v['name'],
									'callback'      => array( $this, 'display_metabox' ),
									'post_type'     => $posttype,
									'context'       => $v['context'],
									'priority'      => $v['priority'],
									'callback_args' => $v,
								);
							} else {
								$title = $v['name'];
								if ( $title != $this->plugin_name ) {
									$title = $this->plugin_name . ' - ' . $title;
								}
								if ( ! empty( $v['help_link'] ) ) {
									$title .= "<a class='aioseop_help_text_link aioseop_meta_box_help' target='_blank' href='" . $lopts['help_link'] . "'><span>" . __( 'Help', 'all-in-one-seo-pack' ) . '</span></a>';
								}
								add_meta_box( $v['prefix'] . $k, $title, array(
									$this,
									'display_metabox',
								), $posttype, $v['context'], $v['priority'], $v );
							}
						}
					}
				}
			}
		}

		/**
		 * Update postmeta for metabox.
		 *
		 * @param $post_id
		 */
		function save_post_data( $post_id ) {
			static $update = false;
			if ( $update ) {
				return;
			}
			if ( $this->locations !== null ) {
				foreach ( $this->locations as $k => $v ) {
					if ( isset( $v['type'] ) && ( $v['type'] === 'metabox' ) ) {
						$opts    = $this->default_options( $k );
						$options = array();
						$update  = false;
						foreach ( $opts as $l => $o ) {
							if ( isset( $_POST[ $l ] ) ) {
								$options[ $l ] = stripslashes_deep( $_POST[ $l ] );
								$options[ $l ] = esc_attr( $options[ $l ] );
								$update        = true;
							}
						}
						if ( $update ) {
							$prefix  = $this->get_prefix( $k );
							$options = apply_filters( $prefix . 'filter_metabox_options', $options, $k, $post_id );
							update_post_meta( $post_id, '_' . $prefix . $k, $options );
						}
					}
				}
			}
		}

		/**
		 * Outputs radio buttons, checkboxes, selects, multiselects, handles groups.
		 *
		 * @param $args
		 *
		 * @return string
		 */
		function do_multi_input( $args ) {
			extract( $args );
			$buf1 = '';
			$type = $options['type'];

			$strings = array(
				'block'     => "<select name='$name' $attr>%s\n</select>\n",
				'group'     => "\t<optgroup label='%s'>\n%s\t</optgroup>\n",
				'item'      => "\t<option %s value='%s'>%s</option>\n",
				'item_args' => array( 'sel', 'v', 'subopt' ),
				'selected'  => 'selected ',
			);

			if ( ( $type === 'radio' ) || ( $type === 'checkbox' ) ) {
				$strings = array(
					'block'     => "%s\n",
					'group'     => "\t<b>%s</b><br>\n%s\n",
					'item'      => "\t<label class='aioseop_option_setting_label'><input type='$type' %s name='%s' value='%s' %s> %s</label>\n",
					'item_args' => array( 'sel', 'name', 'v', 'attr', 'subopt' ),
					'selected'  => 'checked ',
				);
			}

			$setsel = $strings['selected'];
			if ( isset( $options['initial_options'] ) && is_array( $options['initial_options'] ) ) {
				foreach ( $options['initial_options'] as $l => $option ) {
					$is_group = is_array( $option );
					if ( ! $is_group ) {
						$option = array( $l => $option );
					}
					$buf2 = '';
					foreach ( $option as $v => $subopt ) {
						$sel    = '';
						$is_arr = is_array( $value );
						if ( is_string( $v ) || is_string( $value ) ) {
							if ( is_string( $value ) ) {
								$cmp = ! strcmp( $v, $value );
							} else {
								$cmp = ! strcmp( $v, '' );
							}
							//	$cmp = !strcmp( (string)$v, (string)$value );
						} else {
							$cmp = ( $value == $v );
						}
						if ( ( ! $is_arr && $cmp ) || ( $is_arr && in_array( $v, $value ) ) ) {
							$sel = $setsel;
						}
						$item_arr = array();
						foreach ( $strings['item_args'] as $arg ) {
							$item_arr[] = $$arg;
						}
						$buf2 .= vsprintf( $strings['item'], $item_arr );
					}
					if ( $is_group ) {
						$buf1 .= sprintf( $strings['group'], $l, $buf2 );
					} else {
						$buf1 .= $buf2;
					}
				}
				$buf1 = sprintf( $strings['block'], $buf1 );
			}

			return $buf1;
		}

		/**
		 * Outputs a setting item for settings pages and metaboxes.
		 *
		 * @param $args
		 *
		 * @return string
		 */
		function get_option_html( $args ) {
			static $n = 0;
			extract( $args );
			if ( $options['type'] == 'custom' ) {
				return apply_filters( "{$prefix}output_option", '', $args );
			}
			if ( in_array( $options['type'], array(
					'multiselect',
					'select',
					'multicheckbox',
					'radio',
					'checkbox',
					'textarea',
					'text',
					'submit',
					'hidden',
				) ) && is_string( $value )
			) {
				$value = esc_attr( $value );
			}
			$buf    = '';
			$onload = '';
			if ( ! empty( $options['count'] ) ) {
				$n ++;
				$attr .= " onKeyDown='if (typeof countChars == \"function\") countChars(document.{$this->form}.$name,document.{$this->form}.{$prefix}length$n)' onKeyUp='if (typeof countChars == \"function\") countChars(document.{$this->form}.$name,document.{$this->form}.{$prefix}length$n)'";
				$onload = "if (typeof countChars == \"function\") countChars(document.{$this->form}.$name,document.{$this->form}.{$prefix}length$n);";
			}
			if ( isset( $opts['id'] ) ) {
				$attr .= " id=\"{$opts['id']}\" ";
			}
			switch ( $options['type'] ) {
				case 'multiselect':
					$attr .= ' MULTIPLE';
					$args['attr'] = $attr;
					$args['name'] = $name = "{$name}[]";
				case 'select':
					$buf .= $this->do_multi_input( $args );
					break;
				case 'multicheckbox':
					$args['name']            = $name = "{$name}[]";
					$args['options']['type'] = $options['type'] = 'checkbox';
				case 'radio':
					$buf .= $this->do_multi_input( $args );
					break;
				case 'checkbox':
					if ( $value ) {
						$attr .= ' CHECKED';
					}
					$buf .= "<input name='$name' type='{$options['type']}' $attr>\n";
					break;
				case 'textarea':
					$buf .= "<textarea name='$name' $attr>$value</textarea>";
					break;
				case 'image':
					$buf .= "<input class='aioseop_upload_image_button button-primary' type='button' value='Upload Image' style='float:left;' />" .
					        "<input class='aioseop_upload_image_label' name='$name' type='text' $attr value='$value' size=57 style='float:left;clear:left;'>\n";
					break;
				case 'html':
					$buf .= $value;
					break;
				case 'esc_html':
					$buf .= "<pre>" . esc_html( $value ) . "</pre>\n";
					break;
				default:
					$buf .= "<input name='$name' type='{$options['type']}' $attr value='$value'>\n";
			}
			if ( ! empty( $options['count'] ) ) {
				$size = 60;
				if ( isset( $options['size'] ) ) {
					$size = $options['size'];
				} elseif ( isset( $options['rows'] ) && isset( $options['cols'] ) ) {
					$size = $options['rows'] * $options['cols'];
				}
				if ( isset( $options['count_desc'] ) ) {
					$count_desc = $options['count_desc'];
				} else {
					$count_desc = __( ' characters. Most search engines use a maximum of %s chars for the %s.', 'all-in-one-seo-pack' );
				}
				$buf .= "<br /><input readonly type='text' name='{$prefix}length$n' size='3' maxlength='3' style='width:53px;height:23px;margin:0px;padding:0px 0px 0px 10px;' value='" . $this->strlen( $value ) . "' />"
				        . sprintf( $count_desc, $size, trim( $this->strtolower( $options['name'] ), ':' ) );
				if ( ! empty( $onload ) ) {
					$buf .= "<script>jQuery( document ).ready(function() { {$onload} });</script>";
				}
			}

			return $buf;
		}

		const DISPLAY_HELP_START = '<a class="aioseop_help_text_link" style="cursor:pointer;" title="%s" onclick="toggleVisibility(\'%s_tip\');"><label class="aioseop_label textinput">%s</label></a>';
		const DISPLAY_HELP_END = '<div class="aioseop_help_text_div" style="display:none" id="%s_tip"><label class="aioseop_help_text">%s</label></div>';
		const DISPLAY_LABEL_FORMAT = '<span class="aioseop_option_label" style="text-align:%s;vertical-align:top;">%s</span>';
		const DISPLAY_TOP_LABEL = "</div>\n<div class='aioseop_input aioseop_top_label'>\n";
		const DISPLAY_ROW_TEMPLATE = '<div class="aioseop_wrapper%s" id="%s_wrapper"><div class="aioseop_input">%s<span class="aioseop_option_input"><div class="aioseop_option_div" %s>%s</div>%s</span><p style="clear:left"></p></div></div>';

		/**
		 * Format a row for an option on a settings page.
		 *
		 * @param $name
		 * @param $opts
		 * @param $args
		 *
		 * @return string
		 */
		function get_option_row( $name, $opts, $args ) {
			$label_text = $input_attr = $help_text_2 = $id_attr = '';

			$align = 'right';
			if ( $opts['label'] == 'top' ) {
				$align = 'left';
			}
			if ( isset( $opts['id'] ) ) {
				$id_attr .= " id=\"{$opts['id']}_div\" ";
			}
			if ( $opts['label'] != 'none' ) {
				if ( isset( $opts['help_text'] ) ) {
					$help_text   = sprintf( All_in_One_SEO_Pack_Module::DISPLAY_HELP_START, __( 'Click for Help!', 'all-in-one-seo-pack' ), $name, $opts['name'] );
					$help_text_2 = sprintf( All_in_One_SEO_Pack_Module::DISPLAY_HELP_END, $name, $opts['help_text'] );
				} else {
					$help_text = $opts['name'];
				}
				$label_text = sprintf( All_in_One_SEO_Pack_Module::DISPLAY_LABEL_FORMAT, $align, $help_text );
			} else {
				$input_attr .= ' aioseop_no_label ';
			}
			if ( $opts['label'] == 'top' ) {
				$label_text .= All_in_One_SEO_Pack_Module::DISPLAY_TOP_LABEL;
			}
			$input_attr .= " aioseop_{$opts['type']}_type";

			return sprintf( All_in_One_SEO_Pack_Module::DISPLAY_ROW_TEMPLATE, $input_attr, $name, $label_text, $id_attr, $this->get_option_html( $args ), $help_text_2 );
		}

		/**
		 * Display options for settings pages and metaboxes, allows for filtering settings, custom display options.
		 *
		 * @param null $location
		 * @param null $meta_args
		 */
		function display_options( $location = null, $meta_args = null ) {
			static $location_settings = array();
			$defaults  = null;
			$prefix    = $this->get_prefix( $location );
			$help_link = '';
			if ( is_array( $meta_args['args'] ) && ! empty( $meta_args['args']['default_options'] ) ) {
				$defaults = $meta_args['args']['default_options'];
			}
			if ( ! empty( $meta_args['callback_args'] ) && ! empty( $meta_args['callback_args']['help_link'] ) ) {
				$help_link = $meta_args['callback_args']['help_link'];
			}
			if ( ! empty( $help_link ) ) {
				echo "<a class='aioseop_help_text_link aioseop_meta_box_help' target='_blank' href='" . $help_link . "'><span>" . __( 'Help', 'all-in-one-seo-pack' ) . '</span></a>';
			}

			if ( ! isset( $location_settings[ $prefix ] ) ) {
				$current_options                                 = apply_filters( "{$this->prefix}display_options", $this->get_current_options( array(), $location, $defaults ), $location );
				$settings                                        = apply_filters( "{$this->prefix}display_settings", $this->setting_options( $location, $defaults ), $location, $current_options );
				$current_options                                 = apply_filters( "{$this->prefix}override_options", $current_options, $location, $settings );
				$location_settings[ $prefix ]['current_options'] = $current_options;
				$location_settings[ $prefix ]['settings']        = $settings;
			} else {
				$current_options = $location_settings[ $prefix ]['current_options'];
				$settings        = $location_settings[ $prefix ]['settings'];
			}
			// $opts["snippet"]["default"] = sprintf( $opts["snippet"]["default"], "foo", "bar", "moby" );
			$container = "<div class='aioseop aioseop_options {$this->prefix}settings'>";
			if ( is_array( $meta_args['args'] ) && ! empty( $meta_args['args']['options'] ) ) {
				$args     = array();
				$arg_keys = array();
				foreach ( $meta_args['args']['options'] as $a ) {
					if ( ! empty( $location ) ) {
						$key = $prefix . $location . '_' . $a;
						if ( ! isset( $settings[ $key ] ) ) {
							$key = $a;
						}
					} else {
						$key = $prefix . $a;
					}
					if ( isset( $settings[ $key ] ) ) {
						$arg_keys[ $key ] = 1;
					} elseif ( isset( $settings[ $a ] ) ) {
						$arg_keys[ $a ] = 1;
					}
				}
				$setting_keys = array_keys( $settings );
				foreach ( $setting_keys as $s ) {
					if ( ! empty( $arg_keys[ $s ] ) ) {
						$args[ $s ] = $settings[ $s ];
					}
				}
			} else {
				$args = $settings;
			}
			foreach ( $args as $name => $opts ) {
				$attr_list = array( 'class', 'style', 'readonly', 'disabled', 'size', 'placeholder' );
				if ( $opts['type'] == 'textarea' ) {
					$attr_list = array_merge( $attr_list, array( 'rows', 'cols' ) );
				}
				$attr = '';
				foreach ( $attr_list as $a ) {
					if ( isset( $opts[ $a ] ) ) {
						$attr .= ' ' . $a . '="' . esc_attr( $opts[ $a ] ) . '" ';
					}
				}
				$opt = '';
				if ( isset( $current_options[ $name ] ) ) {
					$opt = $current_options[ $name ];
				}
				if ( $opts['label'] == 'none' && $opts['type'] == 'submit' && $opts['save'] == false ) {
					$opt = $opts['name'];
				}
				if ( $opts['type'] == 'html' && empty( $opt ) && $opts['save'] == false ) {
					$opt = $opts['default'];
				}

				$args = array(
					'name'    => $name,
					'options' => $opts,
					'attr'    => $attr,
					'value'   => $opt,
					'prefix'  => $prefix,
				);
				if ( ! empty( $opts['nowrap'] ) ) {
					echo $this->get_option_html( $args );
				} else {
					if ( $container ) {
						echo $container;
						$container = '';
					}
					echo $this->get_option_row( $name, $opts, $args );
				}
			}
			if ( ! $container ) {
				echo '</div>';
			}
		}

		/**
		 * @param $domain
		 *
		 * @return mixed|string
		 */
		function sanitize_domain( $domain ) {
			$domain = trim( $domain );
			$domain = $this->strtolower( $domain );
			if ( $this->strpos( $domain, 'http://' ) === 0 ) {
				$domain = $this->substr( $domain, 7 );
			} elseif ( $this->strpos( $domain, 'https://' ) === 0 ) {
				$domain = $this->substr( $domain, 8 );
			}
			$domain = untrailingslashit( $domain );

			return $domain;
		}

		/** Sanitize options
		 *
		 * @param null $location
		 */
		function sanitize_options( $location = null ) {
			foreach ( $this->setting_options( $location ) as $k => $v ) {
				if ( isset( $this->options[ $k ] ) ) {
					if ( ! empty( $v['sanitize'] ) ) {
						$type = $v['sanitize'];
					} else {
						$type = $v['type'];
					}
					switch ( $type ) {
						case 'multiselect':
						case 'multicheckbox':
							$this->options[ $k ] = urlencode_deep( $this->options[ $k ] );
							break;
						case 'textarea':
							$this->options[ $k ] = wp_kses_post( $this->options[ $k ] );
							$this->options[ $k ] = htmlspecialchars( $this->options[ $k ], ENT_QUOTES );
							break;
						case 'filename':
							$this->options[ $k ] = sanitize_file_name( $this->options[ $k ] );
							break;
						case 'text':
							$this->options[ $k ] = wp_kses_post( $this->options[ $k ] );
						case 'checkbox':
						case 'radio':
						case 'select':
						default:
							if ( ! is_array( $this->options[ $k ] ) ) {
								$this->options[ $k ] = esc_attr( $this->options[ $k ] );
							}
					}
				}
			}
		}

		/**
		 * Display metaboxes with display_options()
		 *
		 * @param $post
		 * @param $metabox
		 */
		function display_metabox( $post, $metabox ) {
			$this->display_options( $metabox['args']['location'], $metabox );
		}

		/**
		 * Handle resetting options to defaults.
		 *
		 * @param null $location
		 * @param bool $delete
		 */
		function reset_options( $location = null, $delete = false ) {
			if ( $delete === true ) {
				$this->delete_class_option( $delete );
				$this->options = array();
			}
			$default_options = $this->default_options( $location );
			foreach ( $default_options as $k => $v ) {
				$this->options[ $k ] = $v;
			}
			$this->update_class_option( $this->options );
		}

		/** handle option resetting and updating
		 *
		 * @param null $location
		 *
		 * @return mixed|string|void
		 */
		function handle_settings_updates( $location = null ) {
			$message = '';
			if ( ( isset( $_POST['action'] ) && $_POST['action'] == 'aiosp_update_module' &&
			       ( isset( $_POST['Submit_Default'] ) || isset( $_POST['Submit_All_Default'] ) || ! empty( $_POST['Submit'] ) ) )
			) {
				$nonce = $_POST['nonce-aioseop'];
				if ( ! wp_verify_nonce( $nonce, 'aioseop-nonce' ) ) {
					die ( __( 'Security Check - If you receive this in error, log out and back in to WordPress', 'all-in-one-seo-pack' ) );
				}
				if ( isset( $_POST['Submit_Default'] ) || isset( $_POST['Submit_All_Default'] ) ) {
					$message = __( 'Options Reset.', 'all-in-one-seo-pack' );
					if ( isset( $_POST['Submit_All_Default'] ) ) {
						$this->reset_options( $location, true );
						do_action( 'aioseop_options_reset' );
					} else {
						$this->reset_options( $location );
					}
				}
				if ( ! empty( $_POST['Submit'] ) ) {
					$message         = __( 'All in One SEO Options Updated.', 'all-in-one-seo-pack' );
					$default_options = $this->default_options( $location );
					foreach ( $default_options as $k => $v ) {
						if ( isset( $_POST[ $k ] ) ) {
							$this->options[ $k ] = stripslashes_deep( $_POST[ $k ] );
						} else {
							$this->options[ $k ] = '';
						}
					}
					$this->sanitize_options( $location );
					$this->options = apply_filters( $this->prefix . 'update_options', $this->options, $location );
					$this->update_class_option( $this->options );
					wp_cache_flush();
				}
				do_action( $this->prefix . 'settings_update', $this->options, $location );
			}

			return $message;
		}

		/** Update / reset settings, printing options, sanitizing, posting back
		 *
		 * @param null $location
		 */
		function display_settings_page( $location = null ) {
			if ( $location != null ) {
				$location_info = $this->locations[ $location ];
			}
			$name = null;
			if ( $location && isset( $location_info['name'] ) ) {
				$name = $location_info['name'];
			}
			if ( ! $name ) {
				$name = $this->name;
			}
			$message = $this->handle_settings_updates( $location );
			$this->settings_page_init();
			?>
			<div class="wrap <?php echo get_class( $this ); ?>">
				<div id="aioseop_settings_header">
					<?php if ( ! empty( $message ) ) {
						echo "<div id=\"message\" class=\"updated fade\"><p>$message</p></div>";
					} ?>
					<div id="icon-aioseop" class="icon32"><br></div>
					<h2><?php echo $name; ?></h2>
					<div id="dropmessage" class="updated" style="display:none;"></div>
				</div>
				<?php
				do_action( 'aioseop_global_settings_header', $location );
				do_action( $this->prefix . 'settings_header', $location );
				?>
				<form id="aiosp_settings_form" name="dofollow" enctype="multipart/form-data" action="" method="post">
					<div id="aioseop_top_button">
						<div id="aiosp_ajax_settings_message"></div>
						<?php

						$submit_options = array(
							'action'         => array( 'type' => 'hidden', 'value' => 'aiosp_update_module' ),
							'module'         => array( 'type' => 'hidden', 'value' => get_class( $this ) ),
							'location'       => array( 'type' => 'hidden', 'value' => $location ),
							'nonce-aioseop'  => array(
								'type'  => 'hidden',
								'value' => wp_create_nonce( 'aioseop-nonce' ),
							),
							'page_options'   => array( 'type' => 'hidden', 'value' => 'aiosp_home_description' ),
							'Submit'         => array(
								'type'  => 'submit',
								'class' => 'button-primary',
								'value' => __( 'Update Options', 'all-in-one-seo-pack' ) . ' &raquo;',
							),
							'Submit_Default' => array(
								'type'  => 'submit',
								'class' => 'button-secondary',
								'value' => sprintf( __( 'Reset %s Settings to Defaults', 'all-in-one-seo-pack' ), $name ) . ' &raquo;',
							),
						);
						$submit_options = apply_filters( "{$this->prefix}submit_options", $submit_options, $location );
						foreach ( $submit_options as $k => $s ) {
							if ( $s['type'] == 'submit' && $k != 'Submit' ) {
								continue;
							}
							$class = '';
							if ( isset( $s['class'] ) ) {
								$class = " class='{$s['class']}' ";
							}
							echo $this->get_option_html( array(
								'name'    => $k,
								'options' => $s,
								'attr'    => $class,
								'value'   => $s['value'],
							) );
						}
						?>
					</div>
					<div class="aioseop_options_wrapper aioseop_settings_left">
						<?php $opts = $this->get_class_option();
						if ( $opts !== false ) {
							$this->options = $opts;
						}
						if ( is_array( $this->layout ) ) {
							foreach ( $this->layout as $l => $lopts ) {
								if ( ! isset( $lopts['tab'] ) || ( $this->current_tab == $lopts['tab'] ) ) {
									$title = $lopts['name'];
									if ( ! empty( $lopts['help_link'] ) ) {
										$title .= "<a class='aioseop_help_text_link aioseop_meta_box_help' target='_blank' href='" . $lopts['help_link'] . "'><span>" . __( 'Help', 'all-in-one-seo-pack' ) . '</span></a>';
									}
									add_meta_box( $this->get_prefix( $location ) . $l . '_metabox', $title, array(
										$this,
										'display_options',
									),
										"{$this->prefix}settings", 'advanced', 'default', $lopts );
								}
							}
						} else {
							add_meta_box( $this->get_prefix( $location ) . 'metabox', $name, array(
								$this,
								'display_options',
							), "{$this->prefix}settings", 'advanced' );
						}
						do_meta_boxes( "{$this->prefix}settings", 'advanced', $location );
						?> <p class="submit" style="clear:both;"><?php
							foreach ( array( 'action', 'nonce-aioseop', 'page_options' ) as $submit_field ) {
								if ( isset( $submit_field ) ) {
									unset( $submit_field );
								}
							}
							foreach ( $submit_options as $k => $s ) {
								$class = '';
								if ( isset( $s['class'] ) ) {
									$class = " class='{$s['class']}' ";
								}
								echo $this->get_option_html( array(
									'name'    => $k,
									'options' => $s,
									'attr'    => $class,
									'value'   => $s['value'],
								) );
							}
							?>    </p>
					</div>
				</form>
				<?php do_action( $this->prefix . 'settings_footer', $location );
				do_action( 'aioseop_global_settings_footer', $location ); ?>
			</div>    <?php
		}

		/**
		 * Get the prefix used for a given location.
		 *
		 * @param null $location
		 *
		 * @return
		 */
		function get_prefix( $location = null ) {
			if ( ( $location != null ) && isset( $this->locations[ $location ]['prefix'] ) ) {
				return $this->locations[ $location ]['prefix'];
			}

			return $this->prefix;
		}

		/** Sets up initial settings
		 *
		 * @param null $location
		 * @param null $defaults
		 *
		 * @return array
		 */
		function setting_options( $location = null, $defaults = null ) {
			if ( $defaults === null ) {
				$defaults = $this->default_options;
			}
			$prefix = $this->get_prefix( $location );
			$opts   = array();
			if ( $location == null || $this->locations[ $location ]['options'] === null ) {
				$options = $defaults;
			} else {
				$options = array();
				$prefix  = "{$prefix}{$location}_";
				if ( ! empty( $this->locations[ $location ]['default_options'] ) ) {
					$options = $this->locations[ $location ]['default_options'];
				}
				foreach ( $this->locations[ $location ]['options'] as $opt ) {
					if ( isset( $defaults[ $opt ] ) ) {
						$options[ $opt ] = $defaults[ $opt ];
					}
				}
			}
			if ( ! $prefix ) {
				$prefix = $this->prefix;
			}
			if ( ! empty( $options ) ) {
				foreach ( $options as $k => $v ) {
					if ( ! isset( $v['name'] ) ) {
						$v['name'] = $this->ucwords( strtr( $k, '_', ' ' ) );
					}
					if ( ! isset( $v['type'] ) ) {
						$v['type'] = 'checkbox';
					}
					if ( ! isset( $v['default'] ) ) {
						$v['default'] = null;
					}
					if ( ! isset( $v['initial_options'] ) ) {
						$v['initial_options'] = $v['default'];
					}
					if ( $v['type'] == 'custom' && ( ! isset( $v['nowrap'] ) ) ) {
						$v['nowrap'] = true;
					} elseif ( ! isset( $v['nowrap'] ) ) {
						$v['nowrap'] = null;
					}
					if ( isset( $v['condshow'] ) ) {
						if ( ! is_array( $this->script_data ) ) {
							$this->script_data = array();
						}
						if ( ! isset( $this->script_data['condshow'] ) ) {
							$this->script_data['condshow'] = array();
						}
						$this->script_data['condshow'][ $prefix . $k ] = $v['condshow'];
					}
					if ( $v['type'] == 'submit' ) {
						if ( ! isset( $v['save'] ) ) {
							$v['save'] = false;
						}
						if ( ! isset( $v['label'] ) ) {
							$v['label'] = 'none';
						}
						if ( ! isset( $v['prefix'] ) ) {
							$v['prefix'] = false;
						}
					} else {
						if ( ! isset( $v['label'] ) ) {
							$v['label'] = null;
						}
					}
					if ( $v['type'] == 'hidden' ) {
						if ( ! isset( $v['label'] ) ) {
							$v['label'] = 'none';
						}
						if ( ! isset( $v['prefix'] ) ) {
							$v['prefix'] = false;
						}
					}
					if ( ( $v['type'] == 'text' ) && ( ! isset( $v['size'] ) ) ) {
						$v['size'] = 57;
					}
					if ( $v['type'] == 'textarea' ) {
						if ( ! isset( $v['cols'] ) ) {
							$v['cols'] = 57;
						}
						if ( ! isset( $v['rows'] ) ) {
							$v['rows'] = 2;
						}
					}
					if ( ! isset( $v['save'] ) ) {
						$v['save'] = true;
					}
					if ( ! isset( $v['prefix'] ) ) {
						$v['prefix'] = true;
					}
					if ( $v['prefix'] ) {
						$opts[ $prefix . $k ] = $v;
					} else {
						$opts[ $k ] = $v;
					}
				}
			}

			return $opts;
		}

		/** Generates just the default option names and values
		 *
		 * @param null $location
		 * @param null $defaults
		 *
		 * @return array
		 */
		function default_options( $location = null, $defaults = null ) {
			$options = $this->setting_options( $location, $defaults );
			$opts    = array();
			foreach ( $options as $k => $v ) {
				if ( $v['save'] ) {
					$opts[ $k ] = $v['default'];
				}
			}

			return $opts;
		}

		/** Gets the current options stored for a given location.
		 *
		 * @param array $opts
		 * @param null  $location
		 * @param null  $defaults
		 * @param null  $post
		 *
		 * @return array
		 */
		function get_current_options( $opts = array(), $location = null, $defaults = null, $post = null ) {
			$prefix   = $this->get_prefix( $location );
			$get_opts = '';
			if ( empty( $location ) ) {
				$type = 'settings';
			} else {
				$type = $this->locations[ $location ]['type'];
			}
			if ( $type === 'settings' ) {
				$get_opts = $this->get_class_option();
			} elseif ( $type == 'metabox' ) {
				if ( $post == null ) {
					global $post;
				}

				if ( ( isset( $_GET['taxonomy'] ) && isset( $_GET['tag_ID'] ) ) || is_category() || is_tag() || is_tax() ) {

					if ( AIOSEOPPRO ) {
						$get_opts = AIO_ProGeneral::getprotax( $get_opts );
					}

				} elseif ( isset( $post ) ) {
					$get_opts = get_post_meta( $post->ID, '_' . $prefix . $location, true );
				}
			}
			$defs = $this->default_options( $location, $defaults );
			if ( $get_opts == '' ) {
				$get_opts = $defs;
			} else {
				$get_opts = wp_parse_args( $get_opts, $defs );
			}
			$opts = wp_parse_args( $opts, $get_opts );

			return $opts;
		}

		/** Updates the options array in the module; loads saved settings with get_option() or uses defaults
		 *
		 * @param array $opts
		 * @param null  $location
		 * @param null  $defaults
		 */
		function update_options( $opts = array(), $location = null, $defaults = null ) {
			if ( $location === null ) {
				$type = 'settings';
			} else {
				$type = $this->locations[ $location ][ $type ];
			}
			if ( $type === 'settings' ) {
				$get_opts = $this->get_class_option();
			}
			if ( $get_opts === false ) {
				$get_opts = $this->default_options( $location, $defaults );
			} else {
				$this->setting_options( $location, $defaults );
			} // hack -- make sure this runs anyhow, for now -- pdb
			$this->options = wp_parse_args( $opts, $get_opts );
		}
	}
}
