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Current File : /home/ailwtbdh/www/wp-content/plugins/wpforo/classes/SEO.php
<?php

namespace wpforo\classes;

use stdClass;

// Exit if accessed directly
if( ! defined( 'ABSPATH' ) ) exit;

class SEO {
	private $options;
	private $default;
	private $stylesheet;
	private $http_protocol = 'HTTP/1.1';
	
	public function __construct() {
		$stylesheet_url   = preg_replace( '/(^https?:)/', '', WPFORO_URL . '/assets/css/wpforo-sitemap.xsl' );
		$this->stylesheet = '<?xml-stylesheet type="text/xsl" href="' . esc_url( (string) $stylesheet_url ) . '"?>';
		
		if( ! empty( $_SERVER['SERVER_PROTOCOL'] ) ) {
			$this->http_protocol = sanitize_text_field( $_SERVER['SERVER_PROTOCOL'] );
		}
		
		$this->init();
	}
	
	public function init() {
		$this->init_defaults();
		$this->init_options();
		$this->init_hooks();
	}
	
	private function init_defaults() {
		$this->default          = new stdClass();
		$this->default->options = [
			'sitemap_items_per_page' => 1000,
			'allow_ping'             => 1,
			'ping_immediately'       => 0,
		];
	}
	
	private function init_options() {
		$this->options = apply_filters( 'wpforo_seo_options', $this->default->options );
	}
	
	private function init_hooks() {
		add_filter( 'wpforo_before_init_current_object', [ $this, 'redirect' ], 10, 2 );
		add_action( 'wpforo_ping_search_engines', [ $this, 'ping_search_engines' ] );
		add_action( 'wpforo_hit_sitemap_index', [ $this, 'hit_sitemap_index' ] );
		add_action( 'wpforo_after_init_classes', function() {
			if( WPF()->board->get_current( 'is_standalone' ) ) add_action( 'wp_sitemaps_enabled', '__return_false' );
		},          1 );
	}
	
	public function sitemap_url( $url ) {
		$date       = ( ! empty( $url['lastmod'] ) ? gmdate( 'c', strtotime( $url['lastmod'] . ' GMT' ) ) : null );
		$url['loc'] = htmlspecialchars( $url['loc'] );
		
		$output = "\t<url>\n";
		$output .= "\t\t<loc>" . $this->encode_url_rfc3986( $url['loc'] ) . "</loc>\n";
		$output .= empty( $date ) ? '' : "\t\t<lastmod>" . htmlspecialchars( $date ) . "</lastmod>\n";
		$output .= "\t</url>\n";
		
		return apply_filters( 'wpforo_sitemap_url', $output, $url );
	}
	
	public function members_sitemap( $paged ) {
		$paged   = absint( $paged );
		$sitemap = '';
		if( $paged && $profiles = $this->get_public_profiles( $paged ) ) {
			foreach( $profiles as $profile ) {
				if( $profile['loc'] = wpforo_member( $profile['userid'], 'profile_url' ) ) {
					$sitemap .= $this->sitemap_url( $profile );
				}
			}
		}
		
		return $sitemap;
	}
	
	public function forums_sitemap() {
		$sitemap = '';
		if( $forums = $this->get_public_forums() ) {
			foreach( $forums as $forum ) {
				$forum['loc'] = wpforo_forum( $forum['forumid'], 'url' );
				$sitemap      .= $this->sitemap_url( $forum );
			}
		}
		
		return $sitemap;
	}
	
	public function topics_sitemap( $paged ) {
		$paged   = absint( $paged );
		$sitemap = '';
		if( $paged && $topics = $this->get_public_topics( $paged ) ) {
			foreach( $topics as $topic ) {
				$topic['loc'] = wpforo_topic( $topic['topicid'], 'url' );
				$sitemap      .= $this->sitemap_url( $topic );
			}
		}
		
		return $sitemap;
	}
	
	private function encode_url_rfc3986( $url ) {
		
		if( filter_var( $url, FILTER_VALIDATE_URL ) ) {
			return $url;
		}
		
		$path = wp_parse_url( $url, PHP_URL_PATH );
		
		if( ! empty( $path ) && '/' !== $path ) {
			$encoded_path = explode( '/', $path );
			
			$encoded_path = array_map( 'rawurldecode', $encoded_path );
			$encoded_path = array_map( 'rawurlencode', $encoded_path );
			$encoded_path = implode( '/', $encoded_path );
			$encoded_path = str_replace( '%7E', '~', $encoded_path ); // PHP <5.3.
			
			$url = str_replace( $path, $encoded_path, $url );
		}
		
		$query = wp_parse_url( $url, PHP_URL_QUERY );
		
		if( ! empty( $query ) ) {
			
			parse_str( $query, $parsed_query );
			
			if( defined( 'PHP_QUERY_RFC3986' ) ) { // PHP 5.4+.
				$parsed_query = http_build_query( $parsed_query, null, '&amp;', PHP_QUERY_RFC3986 );
			} else {
				$parsed_query = http_build_query( $parsed_query, null, '&amp;' );
				$parsed_query = str_replace( '+', '%20', $parsed_query );
				$parsed_query = str_replace( '%7E', '~', $parsed_query );
			}
			
			$url = str_replace( $query, $parsed_query, $url );
		}
		
		return $url;
	}
	
	private function get_public_profiles( $paged = 0 ) {
		$profiles = [];
		if( $groupids = WPF()->usergroup->get_visible_usergroup_ids() ) {
			$items_per_page = $this->options['sitemap_items_per_page'];
			$sql            = "SELECT `userid`, FROM_UNIXTIME( IFNULL(`online_time`, UNIX_TIMESTAMP()) ) AS lastmod
            FROM " . WPF()->tables->profiles . "
            WHERE `groupid` IN(" . implode( ',', $groupids ) . ")
            OR `secondary_groupids` REGEXP '(,|^)(" . implode( '|', $groupids ) . ")(,|$)'
            ORDER BY `userid` ASC";
			
			if( $paged ) $sql .= " LIMIT " . ( -- $paged * $items_per_page ) . ", $items_per_page";
			$profiles = (array) WPF()->db->get_results( $sql, ARRAY_A );
		}
		
		return $profiles;
	}
	
	private function get_public_forums() {
		$forums = [];
		if( $forumids = $this->get_public_forumids() ) {
			$sql    = "SELECT `forumid`,
	          CASE
	            WHEN `last_post_date` = '0000-00-00 00:00:00'
	            THEN NOW()
	            ELSE `last_post_date`
	          END AS lastmod
	          FROM " . WPF()->tables->forums . "
	          WHERE `forumid` IN(" . implode( ',', $forumids ) . ")
	          ORDER BY `parentid` ASC, `title` ASC";
			$forums = (array) WPF()->db->get_results( $sql, ARRAY_A );
		}
		
		return $forums;
	}
	
	private function get_public_forumids() {
		$forumids = [];
		$sql      = "SELECT `forumid` FROM " . WPF()->tables->forums . " ORDER BY `parentid` ASC, `title` ASC";
		if( $_forumids = WPF()->db->get_col( $sql ) ) {
			foreach( $_forumids as $_forumid ) {
				if( WPF()->perm->forum_can( 'vf', $_forumid ) ) {
					$forumids[] = $_forumid;
				}
			}
		}
		
		return $forumids;
	}
	
	private function get_public_topics( $paged = 0 ) {
		$topics = [];
		if( $forumids = $this->get_public_forumids() ) {
			$items_per_page = $this->options['sitemap_items_per_page'];
			$sql            = "SELECT `topicid`, `modified` as lastmod
            FROM " . WPF()->tables->topics . "
            WHERE  `private` = 0
            AND `status` = 0
            AND `forumid` IN(" . implode( ',', $forumids ) . ")
            ORDER BY `topicid` ASC";
			if( $paged ) $sql .= " LIMIT " . ( -- $paged * $items_per_page ) . ", $items_per_page";
			$topics = (array) WPF()->db->get_results( $sql, ARRAY_A );
		}
		
		return $topics;
	}
	
	private function get_public_profiles_count() {
		$count = 0;
		if( $groupids = WPF()->usergroup->get_visible_usergroup_ids() ) {
			$sql   = "SELECT COUNT(*)
            FROM " . WPF()->tables->profiles . "
            WHERE `groupid` IN(" . implode( ',', $groupids ) . ")
            OR `secondary_groupids` REGEXP '(,|^)(" . implode( '|', $groupids ) . ")(,|$)'";
			$count = (int) WPF()->db->get_var( $sql );
		}
		
		return $count;
	}
	
	private function get_public_topics_count() {
		$count = 0;
		if( $forumids = $this->get_public_forumids() ) {
			$sql   = "SELECT COUNT(*)
            FROM " . WPF()->tables->topics . "
            WHERE  `private` = 0
            AND `status` = 0
            AND `forumid` IN(" . implode( ',', $forumids ) . ")";
			$count = (int) WPF()->db->get_var( $sql );
		}
		
		return $count;
	}
	
	public function get_root_map() {
		$links          = [];
		$items_per_page = $this->options['sitemap_items_per_page'];
		
		if( wpforo_setting( 'seo', 'topics_sitemap' ) ) {
			if( $topics_count = $this->get_public_topics_count() ) {
				$pages_count = ceil( $topics_count / $items_per_page );
				for( $i = 1; $i <= $pages_count; $i ++ ) {
					$links[] = trim( wpforo_home_url( 'topic-sitemap' . $i . '.xml' ), '/' );
				}
			}
		}
		
		if( wpforo_setting( 'seo', 'members_sitemap' ) ) {
			if( $profiles_count = $this->get_public_profiles_count() ) {
				$pages_count = ceil( $profiles_count / $items_per_page );
				for( $i = 1; $i <= $pages_count; $i ++ ) {
					$links[] = trim( wpforo_home_url( 'profile-sitemap' . $i . '.xml' ), '/' );
				}
			}
		}
		
		$links[] = trim( wpforo_home_url( 'forum-sitemap.xml' ), '/' );
		
		// make sitemap index
		$xml = '<sitemapindex xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">' . "\n";
		
		foreach( $links as $link ) {
			$link = htmlspecialchars( $link );
			
			$xml .= "\t<sitemap>\n";
			$xml .= "\t\t<loc>" . $link . "</loc>\n";
			$xml .= "\t</sitemap>\n";
		}
		
		$xml .= apply_filters( 'wpforo_sitemap_index', '' );
		$xml .= '</sitemapindex>';
		
		return $xml;
	}
	
	public function get_sitemap( $type, $paged ) {
		$transient_key = 'wpforo_seo_sitemap_' . WPF()->board->get_current( 'boardid' ) . $type . $paged;
		
		if( ! $xml = get_transient( $transient_key ) ) {
			if( $type ) {
				$urls = '';
				switch( $type ) {
					case 'topic':
						if( wpforo_setting( 'seo', 'topics_sitemap' ) ) $urls = $this->topics_sitemap( $paged );
					break;
					case 'forum':
						if( wpforo_setting( 'seo', 'forums_sitemap' ) ) $urls = $this->forums_sitemap();
					break;
					case 'profile':
						if( wpforo_setting( 'seo', 'members_sitemap' ) ) $urls = $this->members_sitemap( $paged );
					break;
				}
				
				if( $urls ) {
					$urlset = '<urlset xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:image="http://www.google.com/schemas/sitemap-image/1.1" ' . 'xsi:schemaLocation="http://www.sitemaps.org/schemas/sitemap/0.9 http://www.sitemaps.org/schemas/sitemap/0.9/sitemap.xsd ' . 'http://www.google.com/schemas/sitemap-image/1.1 http://www.google.com/schemas/sitemap-image/1.1/sitemap-image.xsd" ' . 'xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">' . "\n";
					$xml    = apply_filters( "wpforo_sitemap_{$type}_urlset", $urlset );
					$xml    .= $urls;
					$xml    .= '</urlset>';
				}
			} else {
				$xml = $this->get_root_map();
			}
			
			set_transient( $transient_key, $xml, DAY_IN_SECONDS );
		}
		
		return (string) $xml;
	}
	
	public function get_output( $sitemap ) {
		$output = '<?xml version="1.0" encoding="UTF-8"?>';
		
		if( $this->stylesheet ) {
			$output .= apply_filters( 'wpforo_stylesheet_url', $this->stylesheet ) . "\n";
		}
		
		$output .= $sitemap;
		$output .= "\n<!-- XML Sitemap generated by wpForo SEO -->";
		
		return $output;
	}
	
	public function output( $sitemap ) {
		
		if( ! headers_sent() ) {
			header( $this->http_protocol . ' 200 OK', true, 200 );
			// Prevent the search engines from indexing the XML Sitemap.
			header( 'X-Robots-Tag: noindex, follow', true );
			header( 'Content-Type: text/xml; charset=UTF-8' );
		}
		
		echo $this->get_output( $sitemap );
	}
	
	public function sitemap_close() {
		remove_all_actions( 'wp_footer' );
		die();
	}
	
	public function redirect( $current_object, $wpf_url_parse ) {
		$pattern = '#^[\r\n\t\s\0]*(?<type>\w*)-?sitemap(?:(?<paged>\d*)|_index)\.xml[\r\n\t\s\0]*$#iu';
		if( ! empty( $wpf_url_parse[0] ) && preg_match( $pattern, basename( (string) $wpf_url_parse[0] ), $match ) ) {
			$current_object['template'] = 'sitemap';
			
			$query = [ 'type' => '', 'paged' => 1 ];
			$query = wpforo_parse_args( $match, $query );
			$type  = trim( (string) $query['type'] );
			$paged = absint( $query['paged'] );
			if( ! $paged ) $paged = 1;
			
			if( $sitemap = $this->get_sitemap( $type, $paged ) ) {
				$this->output( $sitemap );
				$this->sitemap_close();
			} else {
				$current_object['is_404'] = true;
			}
		}
		
		return $current_object;
	}
	
	public function hit_sitemap_index() {
		wp_remote_get( trim( wpforo_home_url( 'sitemap_index.xml' ), '/' ), [ 'blocking' => false, 'timeout' => 5 ] );
	}
	
	public function ping_search_engines( $url = '' ) {
		if( ! $this->options['allow_ping'] || ! $this->get_public_forumids() ) return;
		if( ! $url ) $url = urlencode( trim( wpforo_home_url( 'sitemap_index.xml' ), '/' ) );
		wp_remote_get( 'https://www.google.com/webmasters/sitemaps/ping?sitemap=' . $url, [ 'blocking' => false ] );
		wp_remote_get( 'https://www.bing.com/ping?sitemap=' . $url, [ 'blocking' => false ] );
	}
	
	public function clear_cache( $type = '', $paged = 1 ) {
		if( $type == '' && $paged = 1 ) {
			$like     = 'wpforo_seo_sitemap_%';
			$wheres   = [];
			$wheres[] = sprintf( "option_name LIKE '%s'", addcslashes( '_transient_' . $like, '_' ) );
			$wheres[] = sprintf( "option_name LIKE '%s'", addcslashes( '_transient_timeout_' . $like, '_' ) );
			
			// Delete transients.
			$sql = sprintf( 'DELETE FROM %1$s WHERE %2$s', WPF()->db->options, implode( ' OR ', $wheres ) );
			WPF()->db->query( $sql );
		} else {
			$transient_key = 'wpforo_seo_sitemap_' . $type . $paged;
			delete_transient( $transient_key );
		}
		
		switch( $type ) {
			case 'profile':
				if( ! wpforo_setting( 'seo', 'members_sitemap' ) ) return;
			break;
			case 'forum':
				if( ! wpforo_setting( 'seo', 'forums_sitemap' ) ) return;
			break;
			case 'topic':
				if( ! wpforo_setting( 'seo', 'topics_sitemap' ) ) return;
			break;
			case '':
			break;
			default:
				return;
		}
		
		wp_schedule_single_event( ( time() + 300 ), 'wpforo_hit_sitemap_index' );
		
		if( ! $this->options['allow_ping'] ) return;
		
		if( $this->options['ping_immediately'] ) {
			$this->ping_search_engines();
		} elseif( ! wp_next_scheduled( 'wpforo_ping_search_engines' ) ) {
			wp_schedule_single_event( ( time() + 300 ), 'wpforo_ping_search_engines' );
		}
	}
}

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