<?php
/*
* Onion Link List - Main listing script
*
* Copyright (C) 2016-2020 Daniel Winzen <daniel@danwin1210.de>
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program.  If not, see <http://www.gnu.org/licenses/>.
*/

if($_SERVER['REQUEST_METHOD']==='HEAD'){
	exit; // ignore headers, no further processing needed
}
require_once(__DIR__.'/../common_config.php');
try{
	$db=new PDO('mysql:host=' . DBHOST . ';dbname=' . DBNAME . ';charset=utf8mb4', DBUSER, DBPASS, [PDO::ATTR_ERRMODE=>PDO::ERRMODE_WARNING, PDO::ATTR_PERSISTENT=>PERSISTENT]);
}catch(PDOException $e){
	http_response_code(500);
}
date_default_timezone_set('UTC');
//select output format
if(!isset($_REQUEST['format'])){
	send_html();
}elseif($_REQUEST['format']==='text'){
	send_text();
}elseif($_REQUEST['format']==='json'){
	send_json();
}else{
	send_html();
}

function send_html(): void
{
	global $categories, $db, $language, $dir;
	$numrows = 0;
	$style = '.row{display:flex;flex-wrap:wrap}.headerrow{font-weight:bold}.col{display:flex;flex:1;padding:3px 3px;flex-direction:column}';
	$style .= '.red{color:red}.green{color:green}.up .col:nth-child(0n+3),.up .col:nth-child(0n+4){background-color:#aaff88}.down .col:nth-child(0n+3),.down .col:nth-child(0n+4){background-color:#ff4444}';
	$style .= '.promo{outline:medium solid #FFD700}.list{padding:0;}.list li{display:inline-block;padding:0.35em}.pagination{font-size:1.2em}';
	$style .= '.active{font-weight:bold}#maintable .col{word-break:break-all;min-width:5em}#maintable,#maintable .col{border: 1px solid black}#edit-search .col{vertical-align:top}';
	$style .= '#maintable .col:nth-child(0n+3){word-break:unset}#maintable .col:last-child{max-width:5em}.software-link{text-align:center;font-size:small}';
	send_headers([$style]);
	asort($categories);
	//sql for special categories
	$special=[
		_('All legitimate')=>"address!='' AND category!=15 AND id NOT IN (SELECT onion_id FROM " . PREFIX . 'phishing) AND timediff<604800',
		_('Last added')=>"address!='' AND id NOT IN (SELECT onion_id FROM " . PREFIX . 'phishing)',
		_('Offline > 1 week')=>"address!='' AND id NOT IN (SELECT onion_id FROM " . PREFIX . 'phishing) AND timediff>604800'
	];
	$canonical_query = [];
	if(isset($_REQUEST['cat'])) {
		$canonical_query['cat'] = $_REQUEST['cat'];
	}
	if(isset($_REQUEST['pg'])) {
		$canonical_query['pg'] = $_REQUEST['pg'];
	}
	if(!isset($_REQUEST['pg'])){
		$_REQUEST['pg']=1;
	}else{
		settype($_REQUEST['pg'], 'int');
	}
	if($_REQUEST['pg']>0){
		$_REQUEST['newpg']=1;
	}else{
		$_REQUEST['newpg']=0;
	}
	$category=count($categories);
	if(isset($_REQUEST['cat']) && $_REQUEST['cat']<(count($categories)+count($special)+1) && $_REQUEST['cat']>=0){
		settype($_REQUEST['cat'], 'int');
		$category=$_REQUEST['cat'];
	}
	$pages=1;
	$admin_approval = '';
	if(REQUIRE_APPROVAL){
		$admin_approval = PREFIX . 'onions.approved = 1 AND';
	}
	$category_count = [];
	$cat=count($categories);
	if($db instanceof PDO) {
		foreach ( $special as $name => $query ) {
			if ( $name === _('Last added') ) {
				$category_count[ $cat ] = PER_PAGE;
			} else {
				$category_count[ $cat ] = $db->query( 'SELECT COUNT(*) FROM ' . PREFIX . "onions WHERE $admin_approval $query;" )->fetch( PDO::FETCH_NUM )[ 0 ];
			}
			if ( $category == $cat ) {
				$pages = ceil( $category_count[ $cat ] / PER_PAGE );
			}
			++$cat;
		}
		$category_count[ $cat ] = $db->query( 'SELECT COUNT(*) FROM ' . PREFIX . 'phishing, ' . PREFIX . 'onions WHERE ' . "$admin_approval " . PREFIX . "onions.id=onion_id AND address!='' AND timediff<604800;" )->fetch( PDO::FETCH_NUM )[ 0 ];
		$category_count[ 'removed' ] = $db->query( 'SELECT COUNT(*) FROM ' . PREFIX . "onions WHERE address='';" )->fetch( PDO::FETCH_NUM )[ 0 ];
		if ( REQUIRE_APPROVAL ) {
			$category_count[ 'pending' ] = $db->query( 'SELECT COUNT(*) FROM ' . PREFIX . "onions WHERE approved = 0 AND address!='';" )->fetch( PDO::FETCH_NUM )[ 0 ];
			$category_count[ 'rejected' ] = $db->query( 'SELECT COUNT(*) FROM ' . PREFIX . "onions WHERE approved = -1 AND address!='';" )->fetch( PDO::FETCH_NUM )[ 0 ];
		}
		$stmt = $db->prepare( 'SELECT COUNT(*) FROM ' . PREFIX . "onions WHERE $admin_approval category=? AND address!='' AND id NOT IN (SELECT onion_id FROM " . PREFIX . 'phishing) AND timediff<604800;' );
		foreach ( $categories as $cat => $name ) {
			$stmt->execute( [ $cat ] );
			$category_count[ $cat ] = $stmt->fetch( PDO::FETCH_NUM )[ 0 ];
			if ( $category == $cat ) {
				$pages = ceil( $category_count[ $cat ] / PER_PAGE );
			}
		}
		if ( $_REQUEST[ 'pg' ] > $pages && $_REQUEST[ 'pg' ] > 1 ) {
			http_response_code( 404 );
		}
	}
	echo '<!DOCTYPE html><html lang="'.$language.'" dir="'.$dir.'"><head>';
	echo "<title>"._('Onion link list')."</title>";
	echo '<meta http-equiv="Content-Type" content="text/html; charset=utf-8">';
	echo '<meta name="author" content="Daniel Winzen">';
	echo '<meta name="viewport" content="width=device-width, initial-scale=1">';
	echo '<meta name="description" content="Huge link list of Tor hidden service onions. All the darknet links you need in one place.">';
	echo '<link rel="search" type="application/opensearchdescription+xml" href="/opensearch.php" title="'._('Onion link list').'"/>';
	echo '<link rel="canonical" href="' . CANONICAL_URL . $_SERVER['SCRIPT_NAME'] . (empty($canonical_query) ? '' : '?' . http_build_query($canonical_query)) . '">';
	echo '<link rel="alternate" href="' . CANONICAL_URL . $_SERVER['SCRIPT_NAME'] . (empty($canonical_query) ? '' : '?' . http_build_query($canonical_query)) . '" hreflang="x-default">';
	alt_links();
	echo '<style>'.$style.'</style>';
	echo '<base target="_blank">';
	echo '</head><body><main>';
	echo "<h1>"._('Onion link list')."</h1>";
	if(!isset($db)){
		send_error(_('Error: No database connection!'));
	}
	echo '<p>I\'m not responsible for any content of websites linked here. 99% of darkweb sites selling anything are scams. Be careful and use your brain. Every week I get 2-5 E-Mails from people that were desperate to make money and fell for scammers, don\'t be one of them!</p>';
	//update onions description form
	echo "<div class=\"table\" id=\"edit-search\"><div class=\"row\"><div class=\"col\"><form action=\"$_SERVER[SCRIPT_NAME]\" target=\"_self\" method=\"POST\">";
	echo "<input type=\"hidden\" name=\"pg\" value=\"$_REQUEST[newpg]\">";
	echo "<input type=\"hidden\" name=\"lang\" value=\"$language\">";
	echo "<p><label>"._('Onion address:')." <br><input name=\"addr\" size=\"30\" placeholder=\"http://$_SERVER[HTTP_HOST]\" value=\"";
	if(isset($_REQUEST['addr'])){
		echo htmlspecialchars($_REQUEST['addr']);
	}
	echo '" required></label></p>';
	echo "<p><label>"._('Description:')." <br><textarea name=\"desc\" rows=\"2\" cols=\"30\">";
	if(!empty($_REQUEST['desc'])){//use posted description
		echo htmlspecialchars(trim($_REQUEST['desc']));
	}elseif(!empty($_REQUEST['addr'])){//fetch description from database
		if(preg_match('~(^(https?://)?([a-z0-9]*\.)?([a-z2-7]{55}d)(\.onion(/.*)?)?$)~i', trim($_REQUEST['addr']), $addr)){
			$addr=strtolower($addr[4]);
			$md5=md5($addr, true);
			$stmt=$db->prepare('SELECT description, category FROM ' . PREFIX . 'onions WHERE md5sum=?;');
			$stmt->execute([$md5]);
			if($desc=$stmt->fetch(PDO::FETCH_ASSOC)){
				echo str_replace('<br>', "\n", $desc['description']);
			}
		}
	}
	echo '</textarea></label></p>';
	echo "<p><label>"._('Category:')." <select name=\"cat\">";
	foreach($categories as $cat=>$name){
		echo "<option value=\"$cat\"";
		if($category==$cat || ($cat===0 && $category>=count($categories))){
			echo ' selected';
		}
		echo ">$name</option>";
	}
	echo '</select></label></p>';
	send_captcha();
	echo "<input type=\"submit\" name=\"action\" value=\""._('Update')."\"></form></div>";
	//search from
	echo "<div class=\"col\"><form action=\"$_SERVER[SCRIPT_NAME]\" target=\"_self\" method=\"post\" role=\"search\">";
	echo "<input type=\"hidden\" name=\"pg\" value=\"$_REQUEST[newpg]\">";
	echo "<input type=\"hidden\" name=\"lang\" value=\"$language\">";
	echo "<p><label>"._('Search:')." <br><input name=\"q\" size=\"30\" placeholder=\""._('Search term')."\" value=\"";
	if(isset($_REQUEST['q'])){
		echo trim(str_replace(['http://', 'https://', '.onion', '/'], '', htmlspecialchars($_REQUEST['q'])));
	}
	echo '"></label></p>';
	echo "<p><label>"._('Category:')." <select name=\"cat\">";
	echo '<option value="'.count($categories).'"';
	if($category>=count($categories)){
		echo ' selected';
	}
	echo ">"._('All')."</option>";
	foreach($categories as $cat=>$name){
		echo "<option value=\"$cat\"";
		if($category==$cat){
			echo ' selected';
		}
		echo ">$name</option>";
	}
	echo '</select></label></p>';
	echo '<p><label><input type="checkbox" name="hidelocked" value="1"';
	if(isset($_REQUEST['hidelocked'])){
		echo ' checked';
	}
	echo ">"._('Hide locked')."</label></p>";
	echo "<input type=\"submit\" name=\"action\" value=\""._('Search')."\"></form></div>";
	echo '</div></div>';
	echo "<ul class=\"list\"><li>"._('Format:')."</li><li><a href=\"?format=text\" target=\"_self\">Text</a></li><li><a href=\"?format=json\" target=\"_self\">JSON</a></li></ul>";
	print_langs();
	//List special categories
	echo "<ul class=\"list\"><li>"._('Special categories:')."</li>";
	$cat=count($categories);
	foreach($special as $name=>$query){
		if($category==$cat){
			echo " <li class=\"active\"><a href=\"?cat=$cat&amp;pg=$_REQUEST[newpg]&amp;lang=$language\" target=\"_self\">$name ($category_count[$cat])</a></li>";
		}else{
			echo " <li><a href=\"?cat=$cat&amp;pg=$_REQUEST[newpg]&amp;lang=$language\" target=\"_self\">$name ($category_count[$cat])</a></li>";
		}
		++$cat;
	}
	if($category==$cat){
		echo " <li class=\"active\"><a href=\"?cat=$cat&amp;lang=$language\" target=\"_self\">"._('Phishing Clones')." ($category_count[$cat])</a></li>";
	}else{
		echo " <li><a href=\"?cat=$cat&amp;lang=$language\" target=\"_self\">"._('Phishing Clones')." ($category_count[$cat])</a></li>";
	}
	echo " <li>"._('Removed/Child porn')." ($category_count[removed])</li>";
	if(REQUIRE_APPROVAL) {
		echo " <li>"._('Pending approval')." ($category_count[pending])</li>";
		echo " <li>"._('Rejected')." ($category_count[rejected])</li>";
	}
	echo '</ul>';
	//List normal categories
	echo "<ul class=\"list\"><li>"._('Categories:')."</li>";
	foreach($categories as $cat=>$name){
		if($category==$cat){
			echo " <li class=\"active\"><a href=\"?cat=$cat&amp;pg=$_REQUEST[newpg]&amp;lang=$language\" target=\"_self\">$name ($category_count[$cat])</a></li>";
		}else{
			echo " <li><a href=\"?cat=$cat&amp;pg=$_REQUEST[newpg]&amp;lang=$language\" target=\"_self\">$name ($category_count[$cat])</a></li>";
		}
	}
	echo '</ul>';
	if($_SERVER['REQUEST_METHOD']==='POST' && !empty($_REQUEST['addr'])){
		if(!preg_match('~(^(https?://)?([a-z0-9]*\.)?([a-z2-7]{55}d)(\.onion(/.*)?)?$)~i', trim($_REQUEST['addr']), $addr)){
			echo "<p class=\"red\" role=\"alert\">"._('Invalid onion address!')."</p>";
			echo "<p>"._('A valid address looks like this')." http://tt3j2x4k5ycaa5zt.onion</p>";
		}else{
			if(!isset($_REQUEST['challenge'])){
				send_error(_('Error: Wrong captcha'));
			}
			$stmt=$db->prepare('SELECT code FROM ' . PREFIX . 'captcha WHERE id=?;');
			$stmt->execute([$_REQUEST['challenge']]);
			$stmt->bindColumn(1, $code);
			if(!$stmt->fetch(PDO::FETCH_BOUND)){
				send_error(_('Error: Captcha expired'));
			}
			$time=time();
			$stmt=$db->prepare('DELETE FROM ' . PREFIX . 'captcha WHERE id=? OR time<?;');
			$stmt->execute([$_REQUEST['challenge'], $time-3600]);
			if($_REQUEST['captcha']!==$code){
				if(strrev($_REQUEST['captcha'])!==$code){
					send_error(_('Error: Wrong captcha'));
				}
			}
			$addr=strtolower($addr[4]);
			$md5=md5($addr, true);
			$stmt=$db->prepare('SELECT locked FROM ' . PREFIX . 'onions WHERE md5sum=?;');
			$stmt->execute([$md5]);
			$stmt->bindColumn(1, $locked);
			if($category==count($categories)){
				$category=0;
			}
			if(!isset($_POST['desc'])){
				$desc='';
			}else{
				$desc=trim($_POST['desc']);
				$desc=htmlspecialchars($desc);
				$desc=preg_replace("/(\r?\n|\r\n?)/", '<br>', $desc);
			}
			if(!$stmt->fetch(PDO::FETCH_BOUND)){//new link, add to database
				$stmt=$db->prepare('INSERT INTO ' . PREFIX . 'onions (address, description, md5sum, category, timeadded, timechanged) VALUES (?, ?, ?, ?, ?, ?);');
				$stmt->execute([$addr, $desc, $md5, $category, time(), time()]);
				echo "<p class=\"green\" role=\"alert\">"._('Successfully added onion address!')."</p>";
			}elseif($locked==1){//locked, not editable
				echo "<p class=\"red\" role=\"alert\">"._('Sorry, editing this onion address has been locked!')."</p>";
			}elseif($desc!==''){//update description
				$stmt=$db->prepare('UPDATE ' . PREFIX . 'onions SET description=?, category=?, timechanged=? WHERE md5sum=?;');
				$stmt->execute([$desc, $category, time(), $md5]);
				echo "<p class=\"green\" role=\"alert\">"._('Successfully updated description!')."</p>";
			}elseif($category!=0){//update category only
				$stmt=$db->prepare('UPDATE ' . PREFIX . 'onions SET category=?, timechanged=? WHERE md5sum=?;');
				$stmt->execute([$category, time(), $md5]);
				echo "<p class=\"green\" role=\"alert\">"._('Successfully updated category!')."</p>";
			}else{//nothing changed and already known
				echo "<p class=\"green\" role=\"alert\">"._('Thanks, but I already knew this address!')."</p>";
			}
		}
	}
	if($pages>1 && !isset($_REQUEST['q'])){
		$pagination=get_pagination($category, $pages);
		echo $pagination;
	}else{
		$pagination='';
	}
	if(isset($_REQUEST['q'])){//run search query
		$query=trim(str_replace(['http://', 'https://', '.onion', '/'], '', htmlspecialchars($_REQUEST['q'])));
		$query="%$query%";
		if(isset($_REQUEST['hidelocked'])){
			$hidelocked='AND locked=0';
		}else{
			$hidelocked='';
		}
		if($category>=count($categories)){
			$stmt=$db->prepare('SELECT address, lasttest, lastup, timeadded, description, locked, special FROM ' . PREFIX . "onions WHERE $admin_approval address!='' AND id NOT IN (SELECT onion_id FROM " . PREFIX . "phishing) AND timediff<604800 $hidelocked AND (description LIKE ? OR address LIKE ?) ORDER BY address;");
			$stmt->execute([$query, $query]);
		}else{
			$stmt=$db->prepare('SELECT address, lasttest, lastup, timeadded, description, locked, special FROM ' . PREFIX . "onions WHERE $admin_approval address!='' AND category=? AND id NOT IN (SELECT onion_id FROM " . PREFIX . "phishing) AND timediff<604800 $hidelocked AND (description LIKE ? OR address LIKE ?) ORDER BY address;");
			$stmt->execute([$category, $query, $query]);
		}
		$table=get_table($stmt, $numrows);
		printf("<p><b>"._('Searching for "%1$s", %2$d results found:')."</b></p>", trim(str_replace(['http://', 'https://', '.onion', '/'], '', htmlspecialchars($_REQUEST['q']))), $numrows);
		echo $table;
	}elseif($category>=count($categories)+count($special)){//show phishing clones
		print_phishing_table();
	}elseif($category>=count($categories)){//show special categories
		$tmp=$category-count($categories);
		$query = '';
		foreach($special as $name=>$query){
			if($tmp===0) break;
			--$tmp;
		}
		if($category-count($categories)===1){
			$query.=' ORDER BY id DESC LIMIT ' . PER_PAGE;
		}else{
			$query.=' ORDER BY address';
			if($_REQUEST['pg']>0){
				$offset=PER_PAGE*($_REQUEST['pg']-1);
				$query.=' LIMIT ' . PER_PAGE ." OFFSET $offset";
			}
		}
		$stmt=$db->query('SELECT address, lasttest, lastup, timeadded, description, locked, special FROM ' . PREFIX . "onions WHERE $admin_approval $query;");
		echo get_table($stmt, $numrows, true);
	}else{//show normal categories
		if($_REQUEST['pg']>0){
			$offset=PER_PAGE*($_REQUEST['pg']-1);
			$offsetquery=' LIMIT ' . PER_PAGE . " OFFSET $offset";
		}else{
			$offsetquery='';
		}
		$stmt=$db->prepare('SELECT address, lasttest, lastup, timeadded, description, locked, special FROM ' . PREFIX . "onions WHERE $admin_approval address!='' AND id NOT IN (SELECT onion_id FROM " . PREFIX . "phishing) AND category=? AND timediff<604800 ORDER BY address$offsetquery;");
		$stmt->execute([$category]);
		echo get_table($stmt, $numrows, true);
	}
	echo '<br>';
	echo $pagination;
	echo '<br><p class="software-link"><a href="https://github.com/DanWin/onion-link-list" target="_blank" rel="noopener">Onion Link List - ' . VERSION . '</a></p>';
	echo '</main></body></html>';
}

function get_table(PDOStatement $stmt, int &$numrows = 0, bool $promoted = false) : string {
	global $db, $language;
	$time=time();
	$admin_approval = '';
	if(REQUIRE_APPROVAL){
		$admin_approval = PREFIX . 'onions.approved = 1 AND';
	}
	ob_start();
	echo "<div class=\"table\" id=\"maintable\"><div class=\"row headerrow\"><div class=\"col\">"._('Onion link')."</div><div class=\"col\">"._('Description')."</div><div class=\"col\">"._('Last tested')."</div><div class=\"col\">"._('Last seen')."</div><div class=\"col\">"._('Added at')."</div><div class=\"col\">"._('Actions')."</div></div>";
	if($promoted){//print promoted links at the top
		$time=time();
		$promo=$db->prepare('SELECT address, lasttest, lastup, timeadded, description, locked, special FROM ' . PREFIX . "onions WHERE $admin_approval special>? AND address!='' AND id NOT IN (SELECT onion_id FROM " . PREFIX . 'phishing) AND timediff<604800 ORDER BY address;');
		$promo->execute([$time]);
		while($link=$promo->fetch(PDO::FETCH_ASSOC)){
			if($link['lastup']===$link['lasttest']){
				$class='up';
			}else{
				$class='down';
			}
			if($link['lastup']==0){
				$lastup=_('Never');
			}else{
				$lastup=date('Y-m-d H:i:s', $link['lastup']);
			}
			if($link['lasttest']==0){
				$lasttest=_('Never');
			}else{
				$lasttest=date('Y-m-d H:i:s', $link['lasttest']);
			}
			$timeadded=date('Y-m-d H:i:s', $link['timeadded']);
			echo "<div class=\"$class row promo\"><div class=\"col\"><a href=\"http://$link[address].onion\" rel=\"noopener\">$link[address].onion</a></div><div class=\"col\">$link[description]</div><div class=\"col\">$lasttest</div><div class=\"col\">$lastup</div><div class=\"col\">$timeadded</div><div class=\"col\"><form method=\"post\" action=\"test.php\"><input name=\"addr\" value=\"$link[address]\" type=\"hidden\"><input name=\"lang\" value=\"$language\" type=\"hidden\"><input value=\""._('Test')."\" type=\"submit\"></form></div></div>";
		}
	}
	while($link=$stmt->fetch(PDO::FETCH_ASSOC)){
		if($link['lastup']===$link['lasttest']){
			$class='up';
		}else{
			$class='down';
		}
		if($link['lastup']==0){
			$lastup=_('Never');
		}else{
			$lastup=date('Y-m-d H:i:s', $link['lastup']);
		}
		if($link['lasttest']==0){
			$lasttest=_('Never');
			$class='';
		}else{
			$lasttest=date('Y-m-d H:i:s', $link['lasttest']);
		}
		$timeadded=date('Y-m-d H:i:s', $link['timeadded']);
		if($link['special']>$time){
			$class.=' promo';
		}
		if($link['locked']==1){
			$edit='-';
		}else{
			$edit="<form><input name=\"addr\" value=\"$link[address]\" type=\"hidden\"><input type=\"hidden\" name=\"pg\" value=\"$_REQUEST[newpg]\"><input type=\"hidden\" name=\"lang\" value=\"$language\"><input value=\""._('Edit')."\" type=\"submit\"></form>";
		}
		echo "<div class=\"row $class\"><div class=\"col\"><a href=\"http://$link[address].onion\" rel=\"noopener\">$link[address].onion</a></div><div class=\"col\">$link[description]</div><div class=\"col\">$lasttest</div><div class=\"col\">$lastup</div><div class=\"col\">$timeadded</div><div class=\"col\">$edit <form method=\"post\" action=\"test.php\"><input name=\"addr\" value=\"$link[address]\" type=\"hidden\"><input type=\"hidden\" name=\"lang\" value=\"$language\"><input value=\""._('Test')."\" type=\"submit\"></form></div></div>";
		++$numrows;
	}
	echo '</div>';
	return ob_get_clean();
}

function print_phishing_table(): void
{
	global $db;
	$admin_approval = '';
	if(REQUIRE_APPROVAL){
		$admin_approval = 'approved = 1 AND';
	}
	echo "<div class=\"table\" id=\"maintable\"><div class=\"row headerrow\"><div class=\"col\">"._('Onion link')."</div><div class=\"col\">"._('Clone of')."</div><div class=\"col\">"._('Last seen')."</div></div>";
	$stmt=$db->query('SELECT address, original, lasttest, lastup FROM ' . PREFIX . 'onions, ' . PREFIX . 'phishing WHERE ' . "$admin_approval " . PREFIX . "onions.id=onion_id AND address!='' AND timediff<604800 ORDER BY address;");
	while($link=$stmt->fetch(PDO::FETCH_ASSOC)){
		if($link['lastup']===$link['lasttest']){
			$class='up';
		}else{
			$class='down';
		}
		if($link['lastup']==0){
			$lastup=_('Never');
		}else{
			$lastup=date('Y-m-d H:i:s', $link['lastup']);
		}
		if($link['original']!==''){
			$orig="<a href=\"http://$link[original].onion\" rel=\"noopener\">$link[original].onion</a>";
		}else{
			$orig=_('Unknown');
		}
		echo "<div class=\"row $class\"><div class=\"col\">$link[address].onion</div><div class=\"col\">$orig</div><div class=\"col\">$lastup</div></div>";
	}
	echo '</div>';
}

function send_text(): void
{
	global $db;
	if(!isset($db)){
		die(_('Error: No database connection!'));
	}
	header('Content-Type: text/plain; charset=UTF-8');
	$admin_approval = '';
	if(REQUIRE_APPROVAL){
		$admin_approval = 'approved = 1 AND';
	}
	$stmt=$db->query('SELECT address FROM ' . PREFIX . "onions WHERE $admin_approval address!='' AND id NOT IN (SELECT onion_id FROM " . PREFIX . 'phishing) AND timediff<604800 ORDER BY address;');
	while($tmp=$stmt->fetch(PDO::FETCH_NUM)){
		echo "$tmp[0].onion\n";
	}
}

function send_json(): void
{
	global $db, $categories;
	if(!isset($db)){
		die(_('Error: No database connection!'));
	}
	header('Content-Type: application/json;');
	$admin_approval = '';
	if(REQUIRE_APPROVAL){
		$admin_approval = PREFIX . 'onions.approved = 1 AND';
	}
	$data=['categories'=>$categories];
	$stmt=$db->query('SELECT address, category, description, locked, lastup, lasttest, timeadded, timechanged FROM ' . PREFIX . "onions WHERE $admin_approval address!='' AND id NOT IN (SELECT onion_id FROM " . PREFIX . 'phishing) AND timediff<604800 ORDER BY address;');
	$data['onions']=$stmt->fetchALL(PDO::FETCH_ASSOC);
	$stmt=$db->query('SELECT md5sum FROM ' . PREFIX . "onions WHERE address='';");
	while($tmp=$stmt->fetch(PDO::FETCH_ASSOC)){
		$data['removed'][]=bin2hex($tmp['md5sum']);
	}
	$stmt=$db->query('SELECT address, original FROM ' . PREFIX . 'onions, ' . PREFIX . 'phishing WHERE onion_id=' . PREFIX . "onions.id AND $admin_approval address!='' AND timediff<604800 ORDER BY address;");
	$data['phishing']=$stmt->fetchALL(PDO::FETCH_ASSOC);
	echo json_encode($data);
}

function get_pagination(int $category, int $pages) : string {
	global $language;
	ob_start();
	echo "<ul class=\"list pagination\"><li>"._('Pages:')."</li>";
	if($_REQUEST['pg']==0){
		echo " <li class=\"active\"><a href=\"?cat=$category&amp;pg=0&amp;lang=$language\" target=\"_self\">"._('All')."</a></li>";
	}else{
		echo " <li><a href=\"?cat=$category&amp;pg=0&amp;lang=$language\" target=\"_self\">"._('All')."</a></li>";
	}
	for($i=1; $i<=$pages; ++$i){
		if($_REQUEST['pg']==$i){
			echo " <li class=\"active\"><a href=\"?cat=$category&amp;pg=$i&amp;lang=$language\" target=\"_self\">$i</a></li>";
		}else{
			echo " <li><a href=\"?cat=$category&amp;pg=$i&amp;lang=$language\" target=\"_self\">$i</a></li>";
		}
	}
	echo "</ul>";
	return ob_get_clean();
}

function send_captcha(): void
{
	global $db;
	$difficulty=1;
	if($difficulty===0 || !extension_loaded('gd')){
		return;
	}
	$captchachars='ABCDEFGHJKMNPQRSTUVWXYZabcdefghjkmnpqrstuvwxyz23456789';
	$length=strlen($captchachars)-1;
	$code='';
	for($i=0;$i<5;++$i){
		$code.=$captchachars[mt_rand(0, $length)];
	}
	$randid=mt_rand();
	$time=time();
	$stmt=$db->prepare('INSERT INTO ' . PREFIX . 'captcha (id, time, code) VALUES (?, ?, ?);');
	$stmt->execute([$randid, $time, $code]);
	echo "<p><label>Copy: ";
	if($difficulty===1){
		$im=imagecreatetruecolor(55, 24);
		$bg=imagecolorallocate($im, 0, 0, 0);
		$fg=imagecolorallocate($im, 255, 255, 255);
		imagefill($im, 0, 0, $bg);
		imagestring($im, 5, 5, 5, $code, $fg);
		echo '<img width="55" height="24" alt="captcha image" src="data:image/gif;base64,';
	}else{
		$im=imagecreatetruecolor(55, 24);
		$bg=imagecolorallocate($im, 0, 0, 0);
		$fg=imagecolorallocate($im, 255, 255, 255);
		imagefill($im, 0, 0, $bg);
		imagestring($im, 5, 5, 5, $code, $fg);
		$line=imagecolorallocate($im, 255, 255, 255);
		for($i=0;$i<2;++$i){
			imageline($im, 0, mt_rand(0, 24), 55, mt_rand(0, 24), $line);
		}
		$dots=imagecolorallocate($im, 255, 255, 255);
		for($i=0;$i<100;++$i){
			imagesetpixel($im, mt_rand(0, 55), mt_rand(0, 24), $dots);
		}
		echo '<img width="55" height="24" alt="captcha image" src="data:image/gif;base64,';
	}
	ob_start();
	imagegif($im);
	imagedestroy($im);
	echo base64_encode(ob_get_clean()).'">';
	echo "<input type=\"hidden\" name=\"challenge\" value=\"$randid\"><input type=\"text\" name=\"captcha\" size=\"15\" autocomplete=\"off\"></label></p>";
}

function send_error(string $msg): void
{
	die("<p class=\"red\" role=\"alert\">$msg</p></main></body></html>");
}