<?php
	class PreloadWPFC{
		private static $exclude_rules = false;

		public static function wpml_get_permalink($post_id, $permalink){
			$my_post_language_details = apply_filters( 'wpml_post_language_details', NULL, $post_id) ;

			if(is_array($my_post_language_details) && isset($my_post_language_details["language_code"])){
				$wpml_permalink = apply_filters( 'wpml_permalink', $permalink , $my_post_language_details["language_code"] ); 

				return $wpml_permalink;
			}

			return $permalink;
		}

		public static function set_preload($slug){
			$preload_arr = array();

			if(!empty($_POST) && isset($_POST["wpFastestCachePreload"])){
				foreach ($_POST as $key => $value) {
					$key = esc_attr($key);
					$value = esc_attr($value);
					
					preg_match("/wpFastestCachePreload_(.+)/", $key, $type);

					if(!empty($type)){
						if($type[1] == "restart"){
							//to need to remove "restart" value
						}else if($type[1] == "number"){
							$preload_arr[$type[1]] = $value; 
						}else{
							$preload_arr[$type[1]] = 0; 
						}
					}
				}
			}

			if($data = get_option("WpFastestCachePreLoad")){
				$preload_std = json_decode($data);

				if(!empty($preload_arr)){
					foreach ($preload_arr as $key => &$value) {
						if(!empty($preload_std->$key)){
							if($key != "number"){
								$value = $preload_std->$key;
							}
						}
					}

					$preload_std = $preload_arr;
				}else{
					foreach ($preload_std as $key => &$value) {
						if($key != "number"){
							$value = 0;
						}
					}
				}

				update_option("WpFastestCachePreLoad", json_encode($preload_std));

				if(!wp_next_scheduled($slug."_Preload")){
					wp_schedule_event(time() + 5, 'everyfiveminute', $slug."_Preload");
				}
			}else{
				if(!empty($preload_arr)){
					add_option("WpFastestCachePreLoad", json_encode($preload_arr), null, "yes");

					if(!wp_next_scheduled($slug."_Preload")){
						wp_schedule_event(time() + 5, 'everyfiveminute', $slug."_Preload");
					}
				}else{
					//toDO
				}
			}
		}

		public static function statistic($pre_load = false){
			$total = new stdClass();


			if(isset($pre_load->homepage)){
				$total->homepage = 1;
			}

			if(isset($pre_load->customposttypes)){
				global $wpdb;
				$post_types = get_post_types(array('public' => true), "names", "and"); 
				$where_query = "";

				foreach ($post_types as $post_type_key => $post_type_value) {
					if(!in_array($post_type_key, array("post", "page", "attachment"))){
						$where_query = $where_query.$wpdb->prefix."posts.post_type = '".$post_type_value."' OR ";
					}

				}

				if($where_query){
					$where_query = preg_replace("/(\s*OR\s*)$/", "", $where_query);
		    		
		    		$recent_custom_posts = $wpdb->get_results("SELECT SQL_CALC_FOUND_ROWS  COUNT(".$wpdb->prefix."posts.ID) as total FROM ".$wpdb->prefix."posts  WHERE 1=1  AND (".$where_query.") AND ((".$wpdb->prefix."posts.post_status = 'publish'))  ORDER BY ".$wpdb->prefix."posts.ID", ARRAY_A);
		    		$total->customposttypes = $recent_custom_posts[0]["total"];
		    	}
			}

			if(isset($pre_load->post)){
				$count_posts = wp_count_posts("post", array('post_status' => 'publish', 'suppress_filters' => true));

				$total->post = $count_posts->publish;
			}

			if(isset($pre_load->attachment)){
				$total_attachments = wp_count_attachments();

				$total->attachment = array_sum((array)$total_attachments) - $total_attachments->trash;
			}




			if(isset($pre_load->page)){
				$count_pages = wp_count_posts("page", array('post_status' => 'publish', 'suppress_filters' => true));

				$total->page = $count_pages->publish;
			}

			if(isset($pre_load->category)){
				$total->category = wp_count_terms("category", array('hide_empty' => false));
			}

			if(isset($pre_load->tag)){
				$total->tag = wp_count_terms("post_tag", array('hide_empty' => false));
			}

			if(isset($pre_load->customTaxonomies)){
				$taxo = get_taxonomies(array('public' => true, '_builtin' => false), "names", "and");

				if(count($taxo) > 0){
					$total->customTaxonomies = wp_count_terms($taxo, array('hide_empty' => false));
				}
			}


			foreach ($total as $key => $value) {
				$pre_load->$key = $pre_load->$key == -1 ? $value : $pre_load->$key;
				echo esc_html($key).": ".esc_html($pre_load->$key)."/".esc_html($value)."<br>";
			}
		}

		public static function create_preload_cache($options){
			if($data = get_option("WpFastestCachePreLoad")){
				if(!isset($options->wpFastestCacheStatus)){
					die("Cache System must be enabled");
				}

				$pre_load = json_decode($data);

				if(defined("WPFC_PRELOAD_NUMBER") && WPFC_PRELOAD_NUMBER){
					$number = WPFC_PRELOAD_NUMBER;
				}else{
					$number = $pre_load->number;
				}

				//START:ORDER
				if(isset($pre_load->order) && $pre_load->order){
					$order_arr = explode(",", $pre_load->order);
				}else{
					if(isset($options->wpFastestCachePreload_order) && $options->wpFastestCachePreload_order){
						$order_arr = explode(",", $options->wpFastestCachePreload_order);
					}
				}

				if(isset($order_arr) && is_array($order_arr)){
					foreach ($order_arr as $o_key => $o_value){
						if($o_value == "order" || $o_value == "number"){
							unset($order_arr[$o_key]);
						}

						if(!isset($pre_load->$o_value)){
							unset($order_arr[$o_key]);
						}

					}
					$order_arr = array_values($order_arr);
				}
				
				$current_order = isset($order_arr[0]) ? $order_arr[0] : "go";
				//START:END



				$urls_limit = isset($options->wpFastestCachePreload_number) ? $options->wpFastestCachePreload_number : 4; // must be even
				$urls = array();

				if(isset($options->wpFastestCacheMobileTheme) && $options->wpFastestCacheMobileTheme){
					$mobile_theme = true;
					$number = round($number/2);
				}else{
					$mobile_theme = false;
				}



				// HOME
				if(isset($current_order) && ($current_order == "homepage" || $current_order == "go")){
					if(isset($pre_load->homepage) && $pre_load->homepage > -1){
						if($mobile_theme){
							array_push($urls, array("url" => get_option("home"), "user-agent" => "mobile"));
							$number--;
						}

						array_push($urls, array("url" => get_option("home"), "user-agent" => "desktop"));
						$number--;
						
						$pre_load->homepage = -1;
					}
					
				}


				// CUSTOM POSTS
				if(isset($current_order) && ($current_order == "customposttypes" || $current_order == "go")){
					if($number > 0 && isset($pre_load->customposttypes) && $pre_load->customposttypes > -1){
			    		global $wpdb;
						$post_types = get_post_types(array('public' => true), "names", "and"); 
						$where_query = "";

						foreach ($post_types as $post_type_key => $post_type_value) {
							if(!in_array($post_type_key, array("post", "page", "attachment"))){
								$where_query = $where_query.$wpdb->prefix."posts.post_type = '".$post_type_value."' OR ";
							}

						}

						if($where_query){
							$where_query = preg_replace("/(\s*OR\s*)$/", "", $where_query);
				    		
				    		$recent_custom_posts = $wpdb->get_results("SELECT SQL_CALC_FOUND_ROWS  ".$wpdb->prefix."posts.ID FROM ".$wpdb->prefix."posts  WHERE 1=1  AND (".$where_query.") AND ((".$wpdb->prefix."posts.post_status = 'publish'))  ORDER BY ".$wpdb->prefix."posts.ID DESC LIMIT ".$pre_load->customposttypes.", ".$number, ARRAY_A);

				    		if(count($recent_custom_posts) > 0){
				    			foreach ($recent_custom_posts as $key => $post) {
				    				if($mobile_theme){
				    					array_push($urls, array("url" => self::wpml_get_permalink($post["ID"], get_permalink($post["ID"])), "user-agent" => "mobile"));
				    					$number--;
				    				}

			    					array_push($urls, array("url" => self::wpml_get_permalink($post["ID"], get_permalink($post["ID"])), "user-agent" => "desktop"));
			    					$number--;

				    				$pre_load->customposttypes = $pre_load->customposttypes + 1;
				    			}
				    		}else{
				    			$pre_load->customposttypes = -1;
				    		}
						}
					}
				}


				// POST
				if(isset($current_order) && ($current_order == "post" || $current_order == "go")){
					if($number > 0 && isset($pre_load->post) && $pre_load->post > -1){
			    		// $recent_posts = wp_get_recent_posts(array(
									// 			'numberposts' => $number,
									// 		    'offset' => $pre_load->post,
									// 		    'orderby' => 'ID',
									// 		    'order' => 'DESC',
									// 		    'post_type' => 'post',
									// 		    'post_status' => 'publish',
									// 		    'suppress_filters' => true
									// 		    ), ARRAY_A);
			    		global $wpdb;
			    		$recent_posts = $wpdb->get_results("SELECT SQL_CALC_FOUND_ROWS  ".$wpdb->prefix."posts.ID FROM ".$wpdb->prefix."posts  WHERE 1=1  AND (".$wpdb->prefix."posts.post_type = 'post') AND ((".$wpdb->prefix."posts.post_status = 'publish'))  ORDER BY ".$wpdb->prefix."posts.ID DESC LIMIT ".$pre_load->post.", ".$number, ARRAY_A);


			    		if(count($recent_posts) > 0){
			    			foreach ($recent_posts as $key => $post) {
			    				if($mobile_theme){
			    					array_push($urls, array("url" => self::wpml_get_permalink($post["ID"], get_permalink($post["ID"])), "user-agent" => "mobile"));
			    					$number--;
			    				}

		    					array_push($urls, array("url" => self::wpml_get_permalink($post["ID"], get_permalink($post["ID"])), "user-agent" => "desktop"));
		    					$number--;

			    				$pre_load->post = $pre_load->post + 1;
			    			}
			    		}else{
			    			$pre_load->post = -1;
			    		}
					}
				}



				// ATTACHMENT
				if(isset($current_order) && ($current_order == "attachment" || $current_order == "go")){
					if($number > 0 && isset($pre_load->attachment) && $pre_load->attachment > -1){
						global $wpdb;
			    		$recent_attachments = $wpdb->get_results("SELECT SQL_CALC_FOUND_ROWS  ".$wpdb->prefix."posts.ID FROM ".$wpdb->prefix."posts  WHERE 1=1  AND (".$wpdb->prefix."posts.post_type = 'attachment') ORDER BY ".$wpdb->prefix."posts.ID DESC LIMIT ".$pre_load->attachment.", ".$number, ARRAY_A);

			    		if(count($recent_attachments) > 0){
			    			foreach ($recent_attachments as $key => $attachment) {
			    				if($mobile_theme){
			    					array_push($urls, array("url" => get_permalink($attachment["ID"]), "user-agent" => "mobile"));
			    					$number--;
			    				}

		    					array_push($urls, array("url" => get_permalink($attachment["ID"]), "user-agent" => "desktop"));
		    					$number--;

			    				$pre_load->attachment = $pre_load->attachment + 1;
			    			}
			    		}else{
			    			$pre_load->attachment = -1;
			    		}
					}
				}

				// PAGE
				if(isset($current_order) && ($current_order == "page" || $current_order == "go")){
					if($number > 0 && isset($pre_load->page) && $pre_load->page > -1){

						global $wpdb;
			    		$pages = $wpdb->get_results("SELECT SQL_CALC_FOUND_ROWS  ".$wpdb->prefix."posts.ID FROM ".$wpdb->prefix."posts  WHERE 1=1  AND (".$wpdb->prefix."posts.post_type = 'page') AND ((".$wpdb->prefix."posts.post_status = 'publish'))  ORDER BY ".$wpdb->prefix."posts.ID DESC LIMIT ".$pre_load->page.", ".$number, ARRAY_A);


						if(count($pages) > 0){
							foreach ($pages as $key => $page) {
			    				if($mobile_theme){
			    					array_push($urls, array("url" => get_page_link($page["ID"]), "user-agent" => "mobile"));
			    					$number--;
			    				}

		    					array_push($urls, array("url" => get_page_link($page["ID"]), "user-agent" => "desktop"));
		    					$number--;

			    				$pre_load->page = $pre_load->page + 1;
							}
						}else{
							$pre_load->page = -1;
						}
					}
				}

				// CATEGORY
				if(isset($current_order) && ($current_order == "category" || $current_order == "go")){
					if($number > 0 && isset($pre_load->category) && $pre_load->category > -1){
						$categories = get_terms(array(
													'taxonomy'          => array('category'),
												    'orderby'           => 'id', 
												    'order'             => 'ASC',
												    'hide_empty'        => false, 
												    'number'            => $number, 
												    'fields'            => 'all', 
												    'pad_counts'        => false, 
												    'offset'            => $pre_load->category
												));

						if(count($categories) > 0){
							foreach ($categories as $key => $category) {
								$term_link = get_term_link($category->slug, $category->taxonomy);

								if(isset($term_link->errors)){
									continue;
								}

								if($mobile_theme){
									array_push($urls, array("url" => $term_link, "user-agent" => "mobile"));
									$number--;
								}

								array_push($urls, array("url" => $term_link, "user-agent" => "desktop"));
								$number--;

								$pre_load->category = $pre_load->category + 1;
							}

						}else{
							$pre_load->category = -1;
						}
					}
				}

				// TAG
				if(isset($current_order) && ($current_order == "tag" || $current_order == "go")){
					if($number > 0 && isset($pre_load->tag) && $pre_load->tag > -1){
						$tags = get_terms(array(
													'taxonomy'          => array('post_tag'),
												    'orderby'           => 'id', 
												    'order'             => 'ASC',
												    'hide_empty'        => false, 
												    'number'            => $number, 
												    'fields'            => 'all', 
												    'pad_counts'        => false, 
												    'offset'            => $pre_load->tag
												));

						if(count($tags) > 0){
							foreach ($tags as $key => $tag) {
								if($mobile_theme){
									array_push($urls, array("url" => get_term_link($tag->slug, $tag->taxonomy), "user-agent" => "mobile"));
									$number--;
								}

								array_push($urls, array("url" => get_term_link($tag->slug, $tag->taxonomy), "user-agent" => "desktop"));
								$number--;

								$pre_load->tag = $pre_load->tag + 1;

							}
						}else{
							$pre_load->tag = -1;
						}
					}
				}

				// Custom Taxonomies
				if(isset($current_order) && ($current_order == "customTaxonomies" || $current_order == "go")){
					if($number > 0 && isset($pre_load->customTaxonomies) && $pre_load->customTaxonomies > -1){
						$taxo = get_taxonomies(array('public'   => true, '_builtin' => false), "names", "and");

						if(count($taxo) > 0){
							$custom_taxos = get_terms(array(
									'taxonomy'          => array_values($taxo),
								    'orderby'           => 'id', 
								    'order'             => 'ASC',
								    'hide_empty'        => false, 
								    'number'            => $number, 
								    'fields'            => 'all', 
								    'pad_counts'        => false, 
								    'offset'            => $pre_load->customTaxonomies
								));

							if(count($custom_taxos) > 0){
								foreach ($custom_taxos as $key => $custom_tax) {
									if($mobile_theme){
										array_push($urls, array("url" => get_term_link($custom_tax->slug, $custom_tax->taxonomy), "user-agent" => "mobile"));
										$number--;
									}

									array_push($urls, array("url" => get_term_link($custom_tax->slug, $custom_tax->taxonomy), "user-agent" => "desktop"));
									$number--;

									$pre_load->customTaxonomies = $pre_load->customTaxonomies + 1;

								}
							}else{
								$pre_load->customTaxonomies = -1;
							}
						}else{
							$pre_load->customTaxonomies = -1;
						}
					}
				}


				if(isset($pre_load->$current_order) && $pre_load->$current_order == -1){
					array_shift($order_arr);

					if(isset($order_arr[0])){
						$pre_load->order = implode(",", $order_arr);
						
						update_option("WpFastestCachePreLoad", json_encode($pre_load));

						self::create_preload_cache($options);
					}else{
						unset($pre_load->order);
					}
				}

				if(count($urls) > 0){
					foreach ($urls as $key => $arr) {
						$user_agent = "";

						if($arr["user-agent"] == "desktop"){
							$user_agent = "WP Fastest Cache Preload Bot";
						}else if($arr["user-agent"] == "mobile"){
							$user_agent = "WP Fastest Cache Preload iPhone Mobile Bot";
						}


						if(self::is_excluded($arr["url"])){
							$status = "<strong style=\"color:blue;\">Excluded</strong>";
						}else{
							if($GLOBALS["wp_fastest_cache"]->wpfc_remote_get($arr["url"], $user_agent)){
								$status = "<strong style=\"color:lightgreen;\">OK</strong>";
							}else{
								$status = "<strong style=\"color:red;\">ERROR</strong>";
							}
						}




						echo $status." ".esc_html($arr["url"])." (".esc_html($arr["user-agent"]).")<br>";
					}
					echo "<br>";
					echo count($urls)." page have been cached";

		    		update_option("WpFastestCachePreLoad", json_encode($pre_load));

		    		echo "<br><br>";

		    		self::statistic($pre_load);

				}else{
					if(isset($options->wpFastestCachePreload_restart)){
						foreach ($pre_load as $pre_load_key => &$pre_load_value) {
							//if($pre_load_key != "number" && $pre_load_key != "order"){
							if($pre_load_key != "number"){
								$pre_load_value = 0;
							}
						}

						update_option("WpFastestCachePreLoad", json_encode($pre_load));

						echo "Preload Restarted";

						if($varnish_datas = get_option("WpFastestCacheVarnish")){
							include_once('inc/varnish.php');
							VarnishWPFC::purge_cache($varnish_datas);
						}

						include_once('cdn.php');
						CdnWPFC::cloudflare_clear_cache();
					}else{
						echo "Completed";
						
						wp_clear_scheduled_hook("wp_fastest_cache_Preload");
					}
				}
			}

			if(isset($_GET) && isset($_GET["type"])  && $_GET["type"] == "preload"){
				die();
			}
		}

		public static function is_excluded($url){
			if(!is_string($url)){
				return false;
			}

			$request_url = parse_url($url, PHP_URL_PATH);
			
			if($request_url){
				$request_url = urldecode(trim($request_url, "/"));
			}

			if(!$request_url){
				return false;
			}


			if(self::$exclude_rules === false){
				if($json_data = get_option("WpFastestCacheExclude")){
					self::$exclude_rules = json_decode($json_data);
				}else{
					self::$exclude_rules = array();
				}
			}

			foreach((array)self::$exclude_rules as $key => $value){
				if($value->prefix == "exact"){
					if(strtolower($value->content) == strtolower($request_url)){
						return true;	
					}
				}else{
					if($value->prefix == "startwith"){
						$preg_match_rule = "^".preg_quote($value->content, "/");
					}else if($value->prefix == "contain"){
						$preg_match_rule = preg_quote($value->content, "/");
					}
					
					if(isset($preg_match_rule)){
						if(preg_match("/".$preg_match_rule."/i", $request_url)){
							return true;
						}
					}
				}
			}

			return false;
		}
	}
?>