$value){
		
			$html =
				str_replace(
					"{%{$key}%}",
					$value,
					$html
				);
		}
		
		return trim($html);
	}
	
	public function getthemeclass($raw = true){
		
		if(
			isset($_COOKIE["theme"]) &&
			$_COOKIE["theme"] == "cream"
		){
			
			$body_class = "theme-white ";
		}else{
			
			$body_class = "";
		}
		
		if(
			$raw &&
			$body_class != ""
		){
			
			return ' class="' . rtrim($body_class) . '"';
		}
		
		return $body_class;
	}
	
	public function loadheader(array $get, array $filters, string $page){
		
		echo
			$this->load("header.html", [
				"title" => trim($get["s"] . " ({$page})"),
				"description" => ucfirst($page) . ' search results for "' . htmlspecialchars($get["s"]) . '"',
				"index" => "no",
				"search" => htmlspecialchars($get["s"]),
				"tabs" => $this->generatehtmltabs($page, $get["s"]),
				"filters" => $this->generatehtmlfilters($filters, $get),
				"body_class" => $this->getthemeclass()
			]);
		
		if(
			preg_match(
				'/bot|wget|curl|python-requests|scrapy|feedfetcher|go-http-client|ruby|universalfeedparser|yahoo\! slurp|spider|rss/i',
				$_SERVER["HTTP_USER_AGENT"]
			)
		){
			
			// bot detected !!
			echo
				$this->drawerror(
					"Tshh, blocked!",
					'You were blocked from viewing this page. If you wish to scrape data from 4get, please consider running your own 4get instance or using the API.',
				);
			die();
		}
	}
	
	public function drawerror($title, $error){
		
		return
			$this->load("search.html", [
				"class" => "",
				"right-left" => "",
				"right-right" => "",
				"left" =>
					'
' .
						'
' . htmlspecialchars($title) . '
' .
						$error .
					''
			]);
	}
	
	public function drawtextresult($site, $greentext = null, $duration = null, $keywords, $tabindex = true){
		
		$payload =
			'';
		
		// add favicon, link and archive links
		$payload .= $this->drawlink($site["url"]);
		
		/*
			Draw title + description + filetype
		*/
		$payload .=
			'
';
				
				if($duration !== null){
					
					$payload .=
						'' .
							htmlspecialchars($duration) .
						'
';
				}
				
				$payload .=
					' ';
			}
			
		$payload .=
			'';
		
		if(
			isset($site["type"]) &&
			$site["type"] != "web"
		){
			
			$payload .= '
' . strtoupper($site["type"]) . '
';
		}
		
		$payload .=
			htmlspecialchars($site["title"]) .
		'
 ';
		
		if($greentext !== null){
			
			$payload .=
				'' .
					htmlspecialchars($greentext) .
				'
';
		}
		
		if($site["description"] !== null){
			
			$payload .=
				'' .
					$this->highlighttext($keywords, $site["description"]) .
				'
';
		}
			
		$payload .= '';
		
		/*
			Sublinks
		*/
		if(
			isset($site["sublink"]) &&
			!empty($site["sublink"])
		){
			
			usort($site["sublink"], function($a, $b){
				
				return strlen($a["description"]) > strlen($b["description"]);
			});
			
			$payload .=
				'' .
					'
';
			
			$opentr = false;
			for($i=0; $i' .
							'' .
								htmlspecialchars($site["sublink"][$i]["title"]) .
							'
';
				
				if(!empty($site["sublink"][$i]["date"])){
					
					$payload .=
						'' .
							date("jS M y @ g:ia", $site["sublink"][$i]["date"]) .
						'
';
				}
				
				if(!empty($site["sublink"][$i]["description"])){
					
					$payload .=
						'' .
							$this->highlighttext($keywords, $site["sublink"][$i]["description"]) .
						'
';
				}
				
				$payload .= '';
				
				if($opentr === false){
					
					$payload .= '';
				}
			}
			
			if($opentr === true){
				
				$payload .= ' | ';
			}
			
			$payload .= '
 ';
		}
		
		if(
			isset($site["table"]) &&
			!empty($site["table"])
		){
			
			$payload .= '';
			
			foreach($site["table"] as $title => $value){
				
				$payload .=
					'' .
						'| ' . htmlspecialchars($title) . ' | ' .
						'' . htmlspecialchars($value) . ' | ' .
					'
';
			}
			
			$payload .= '
';
		}
		
		return $payload . '';
	}
	
	public function highlighttext($keywords, $text){
		
		$text = htmlspecialchars($text);
		
		$keywords = explode(" ", $keywords);
		$regex = [];
		
		foreach($keywords as $word){
			
			$regex[] = "\b" . preg_quote($word, "/") . "\b";
		}
		
		$regex = "/" . implode("|", $regex) . "/i";
		
		return
			preg_replace(
				$regex,
				'${0}',
				$text
			);
	}
	
	function highlightcode($text){
		
		// https://www.php.net/highlight_string
		ini_set("highlight.comment", "c-comment");
		ini_set("highlight.default", "c-default");
		ini_set("highlight.html", "c-default");
		ini_set("highlight.keyword", "c-keyword");
		ini_set("highlight.string", "c-string");
		
		$text =
			trim(
				preg_replace(
					'/<\/span>$/',
					"", // remove stray ending span because of the ',
							' '
						],
						[
							"\n", // replace 
 with newlines
							" " // replace html entity to space
						],
						str_replace(
							[
								// leading \n<?php ",
								"",
								""
							],
							"",
							highlight_string("', '', $text);
		}
		
		return $text;
	}
	
	public function drawlink($link){
		
		/*
			Add favicon
		*/
		$host = parse_url($link);
		$esc =
			explode(
				".",
				$host["host"],
				2
			);
		
		if(
			count($esc) === 2 &&
			$esc[0] == "www"
		){
			
			$esc = $esc[1];
		}else{
			
			$esc = $esc[0];
		}
		
		$esc = substr($esc, 0, 2);
		
		$urlencode = urlencode($link);
		
		$payload =
			'' .
				'
' .
				'
';
		
		/*
			Draw link
		*/
		$parts = explode("/", $link);
		$clickurl = "";
		
		// remove trailing /
		$c = count($parts) - 1;
		if($parts[$c] == ""){
			
			$parts[$c - 1] = $parts[$c - 1] . "/";
			unset($parts[$c]);
		}
		
		// merge https://site together
		$parts = [
			$parts[0] . $parts[1] . '//' . $parts[2],
			...array_slice($parts, 3, count($parts) - 1)
		];
		
		$c = count($parts);
		for($i=0; $i<$c; $i++){
			
			if($i !== 0){ $clickurl .= "/"; }
			
			$clickurl .= $parts[$i];
			
			if($i === $c - 1){
				
				$parts[$i] = rtrim($parts[$i], "/");
			}
			
			$payload .=
				'
' .
					htmlspecialchars(urldecode($parts[$i])) .
				'';
			
			if($i !== $c - 1){
				
				$payload .= '
';
			}
		}
		
		return $payload . '
 ';
	}
	
	public function getscraperfilters($page){
		
		$get_scraper = null;
		
		switch($page){
			
			case "web":
				$get_scraper = isset($_COOKIE["scraper_web"]) ? $_COOKIE["scraper_web"] : null;
				break;
			
			case "images":
				$get_scraper = isset($_COOKIE["scraper_images"]) ? $_COOKIE["scraper_images"] : null;
				break;
			
			case "videos":
				$get_scraper = isset($_COOKIE["scraper_videos"]) ? $_COOKIE["scraper_videos"] : null;
				break;
			
			case "news":
				$get_scraper = isset($_COOKIE["scraper_news"]) ? $_COOKIE["scraper_news"] : null;
				break;
		}
		
		if(
			isset($_GET["scraper"]) &&
			is_string($_GET["scraper"])
		){
			
			$get_scraper = $_GET["scraper"];
		}else{
			
			if(
				isset($_GET["npt"]) &&
				is_string($_GET["npt"])
			){
				
				$get_scraper = explode(".", $_GET["npt"], 2)[0];
				
				$get_scraper =
					preg_replace(
						'/[0-9]+$/',
						"",
						$get_scraper
					);
			}
		}
		
		// add search field
		$filters =
			[
				"s" => [
					"option" => "_SEARCH"
				]
			];
		
		// define default scrapers
		switch($page){
			
			case "web":
				$filters["scraper"] = [
					"display" => "Scraper",
					"option" => [
						"ddg" => "DuckDuckGo",
						"brave" => "Brave",
						//"google" => "Google",
						"mojeek" => "Mojeek",
						"marginalia" => "Marginalia",
						"wiby" => "wiby"
					]
				];
				break;
			
			case "images":
				$filters["scraper"] = [
					"display" => "Scraper",
					"option" => [
						"ddg" => "DuckDuckGo",
						"yandex" => "Yandex",
						"brave" => "Brave"//,
						//"google" => "Google"
					]
				];
				break;
			
			case "videos":
				$filters["scraper"] = [
					"display" => "Scraper",
					"option" => [
						"yt" => "YouTube",
						"ddg" => "DuckDuckGo",
						"brave" => "Brave"//,
						//"google" => "Google"
					]
				];
				break;
			
			case "news":
				$filters["scraper"] = [
					"display" => "Scraper",
					"option" => [
						"ddg" => "DuckDuckGo",
						"brave" => "Brave",
						//"google" => "Google",
						"mojeek" => "Mojeek"
					]
				];
				break;
		}
		
		// get scraper name from user input, or default out to preferred scraper
		$scraper_out = null;
		$first = true;
		
		foreach($filters["scraper"]["option"] as $scraper_name => $scraper_pretty){
			
			if($first === true){
				
				$first = $scraper_name;
			}
			
			if($scraper_name == $get_scraper){
				
				$scraper_out = $scraper_name;
			}
		}
		
		if($scraper_out === null){
			
			$scraper_out = $first;
		}
		
		switch($scraper_out){
			
			case "ddg":
				include "scraper/ddg.php";
				$lib = new ddg();
				break;
			
			case "brave":
				include "scraper/brave.php";
				$lib = new brave();
				break;
			
			case "yt";
				include "scraper/youtube.php";
				$lib = new youtube();
				break;
			
			case "yandex":
				include "scraper/yandex.php";
				$lib = new yandex();
				break;
			
			case "google":
				include "scraper/google.php";
				$lib = new google();
				break;
			
			case "mojeek":
				include "scraper/mojeek.php";
				$lib = new mojeek();
				break;
			
			case "marginalia":
				include "scraper/marginalia.php";
				$lib = new marginalia();
				break;
			
			case "wiby":
				include "scraper/wiby.php";
				$lib = new wiby();
				break;
		}
		
		// set scraper on $_GET
		$_GET["scraper"] = $scraper_out;
		
		// set nsfw on $_GET
		if(
			isset($_COOKIE["nsfw"]) &&
			!isset($_GET["nsfw"])
		){
			
			$_GET["nsfw"] = $_COOKIE["nsfw"];
		}
		
		return
			[
				$lib,
				array_merge_recursive(
					$filters,
					$lib->getfilters($page)
				)
			];
	}
	
	public function parsegetfilters($parameters, $whitelist){
		
		$sanitized = [];
		
		// add npt token
		if(
			isset($parameters["npt"]) &&
			is_string($parameters["npt"])
		){
			
			$sanitized["npt"] = $parameters["npt"];
		}else{
			
			$sanitized["npt"] = false;
		}
		
		// we're iterating over $whitelist, so
		// you can't polluate $sanitized with useless
		// parameters
		foreach($whitelist as $parameter => $value){
			
			if(isset($parameters[$parameter])){
				
				if(!is_string($parameters[$parameter])){
					
					$sanitized[$parameter] = null;
					continue;
				}
				
				// parameter is already set, use that value
				$sanitized[$parameter] = $parameters[$parameter];
			}else{
				
				// parameter is not set, add it
				if(is_string($value["option"])){
					
					// special field: set default value manually
					switch($value["option"]){
						
						case "_DATE":
							// no date set
							$sanitized[$parameter] = false;
							break;
						
						case "_SEARCH":
							// no search set
							$sanitized[$parameter] = "";
							break;
					}
					
				}else{
					
					// set a default value
					$sanitized[$parameter] = array_keys($value["option"])[0];
				}
			}
			
			// sanitize input
			if(is_array($value["option"])){
				if(
					!in_array(
						$sanitized[$parameter],
						$keys = array_keys($value["option"])
					)
				){
					
					$sanitized[$parameter] = $keys[0];
				}
			}else{
				
				// sanitize search & string
				switch($value["option"]){
					
					case "_DATE":
						if($sanitized[$parameter] !== false){
							
							$sanitized[$parameter] = strtotime($sanitized[$parameter]);
							if($sanitized[$parameter] <= 0){
								
								$sanitized[$parameter] = false;
							}
						}
						break;
					
					case "_SEARCH":
						
						// get search string & bang
						$sanitized[$parameter] = trim($sanitized[$parameter]);
						$sanitized["bang"] = "";
						
						if(
							strlen($sanitized[$parameter]) !== 0 &&
							$sanitized[$parameter][0] == "!"
						){
							
							$sanitized[$parameter] = explode(" ", $sanitized[$parameter], 2);
							
							$sanitized["bang"] = trim($sanitized[$parameter][0]);
							
							if(count($sanitized[$parameter]) === 2){
								
								$sanitized[$parameter] = trim($sanitized[$parameter][1]);
							}else{
								
								$sanitized[$parameter] = "";
							}
							
							$sanitized["bang"] = ltrim($sanitized["bang"], "!");
						}
						
						$sanitized[$parameter] = ltrim($sanitized[$parameter], "! \n\r\t\v\x00");
				}
			}
		}
		
		// invert dates if needed
		if(
			isset($sanitized["older"]) &&
			isset($sanitized["newer"]) &&
			$sanitized["newer"] !== false &&
			$sanitized["older"] !== false &&
			$sanitized["newer"] > $sanitized["older"]
		){
			
			// invert
			[
				$sanitized["older"],
				$sanitized["newer"]
			] = [
				$sanitized["newer"],
				$sanitized["older"]
			];
		}
		
		return $sanitized;
	}
	public function s_to_timestamp($seconds){
		
		if(is_string($seconds)){
			
			return "LIVE";
		}
		
		return ($seconds >= 60) ? ltrim(gmdate("H:i:s", $seconds), ":0") : gmdate("0:s", $seconds);
	}
	
	public function generatehtmltabs($page, $query){
		
		$html = null;
		
		foreach(["web", "images", "videos", "news"] as $type){
			
			$html .= '' . ucfirst($type) . '';
		}
		
		return $html;
	}
	
	public function generatehtmlfilters($filters, $params){
		
		$html = null;
		
		foreach($filters as $filter_name => $filter_values){
			
			if(!isset($filter_values["display"])){
				
				continue;
			}
			
			$output = true;
			$tmp =
				'' .
					'
' . htmlspecialchars($filter_values["display"]) . '
';
			
			if(is_array($filter_values["option"])){
				
				$tmp .= '
';
			}else{
				
				switch($filter_values["option"]){
					
					case "_DATE":
						$tmp .= '
 $value){
			
			if(
				$value == null ||
				$value == false ||
				$key == "npt" ||
				$key == "extendedsearch" ||
				$value == "any" ||
				$value == "all" ||
				(
					$ommit === true &&
					$key == "s"
				)
			){
				
				continue;
			}
			
			$out[$key] = $value;
		}
		
		return http_build_query($out);
	}
	
	public function htmlimage($image, $format){
		
		if(
			preg_match(
				'/^data:/',
				$image
			)
		){
			
			return htmlspecialchars($image);
		}
		
		return "/proxy.php?i=" . urlencode($image) . "&s=" . $format;
	}
	
	public function htmlnextpage($gets, $npt, $page){
		
		$query = $this->buildquery($gets);
		
		return $page . "?" . $query . "&npt=" . $npt;
	}
}