/index.php

<?php
$some_name = session_name("some_name");
session_set_cookie_params(0, '/', '.hackerhub.org');
session_start();

spl_autoload_register(function($class) {
    $file = "lib/" . strtr($class, '\\', '/') . '.php';
    if (file_exists($file)) {
        require $file;
        return true;
    }
});

$redis = new Predis\Client(array('host' => '127.0.0.1', 'port' => 6379, 'database' => 1));
if(!$_SESSION["theme"]) $_SESSION["theme"] = "dark";

if(is_file($_GET['q'])){
	switch(substr($_GET['q'], strrpos($_GET['q'], '.') + 1)){
		case "js":
			header('Content-type: text/javascript');
			break;
		case "css":
			header('Content-type: text/css');
			break;
		case "png":
			header('Content-type: image/png');
			break;
		case "gif":
			header('Content-type: image/gif');
			break;
		case "jepg":
		case "jpg":
			header('Content-type: image/jpeg');
			break;
		case "ico":
			header('Content-type: image/x-icon');
			break;
		case 'json':
			header('Content-type: application/json');
			break;
		case 'php':
			include($_GET['q']);
			exit;
	}
	echo file_get_contents($_GET['q']);
	exit;
} elseif($_GET['q'] == "sitemap.xml") {
	echo '<?xml version="1.0" encoding="UTF-8"?><urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9"><url><loc>http://hackerhub.org/buzz</loc></url>';
	foreach($redis->keys("*:profile") as $key){
		$user = explode(":", $key);
		echo "<url><loc>http://$user[0].hackerhub.org</loc></url>";
	}
	echo '</urlset>';
	exit;	
}

$url_data = explode(".", $_SERVER['HTTP_HOST']);

$get_data = strlen($_GET['q']) ? explode("/", $_GET['q']) : NULL;

if(count($url_data) == 2 || $url_data[0] == "www"){
	if($_POST){
		if($_POST["jsonurl"]){
			switch(addProfile($_POST["jsonurl"])){
				case "200":
					header("location: http://$profile_name.hackerhub.org");
				break;
				case "404":
					$error_message = "The profile could not be fetched.";
				break;
				case "406":
					$error_message = "The profile is not valid JSON.";
				break;
				case "409":
					$error_message = "The id is already taken.";
				break;
				default: 
					$error_message = "Unknown Error!";
			}
		}
		if($_POST["s"]){
			header("location: /q/" . urlencode($_POST["s"]));
			exit;
		}
	}
	if($get_data[0] == "q"){
		$search_results = search($get_data[1]);
		include("search.php");
		exit;
	}
	if($get_data[0] == "r"){
		refresh($get_data[1]);
		header("location: http://$get_data[1].hackerhub.org");
	}
	if($get_data[0] == "t"){
		$_SESSION["theme"] = $get_data[1];
		if($_SESSION["referrer"]) header('location: ' . $_SESSION["referrer"]);
		else header('location: /');
	}
	
	if($get_data[0] == "buzz"){
		$terms = buzz();
		echo "<h1>". count($terms) ." searchterms</h1>";
		foreach($terms as $term => $matches){
			echo "<h4><a href=\"http://hackerhub.org/q/$term\">$term</a></h4>";
			foreach($matches as $match){
				$match = explode(":", $match);
				echo "<a href='http://$match[0].hackerhub.org/$match[1]'>$match[0].hackerhub.org/$match[1]</a><br>";
			}
		}
		exit;
	}
	
	if($get_data[0] == "xi"){
		$index = index();
		echo "<h1>". count($index) ." users</h1>";
		foreach($index as $name) echo "<p><a href='http://$name.hackerhub.org'>$name</a></p>";
		exit;
	}
	
	include("homepage.php");
	exit;
}

$_SESSION["referrer"] = 'http://' . $_SERVER["SERVER_NAME"].$_SERVER["REQUEST_URI"];

include("lib/phpmarkdownextra/markdown.php");


$profile_name = $url_data[0];

if(!$redis->exists("$profile_name:profile")){
	header("Status: 404 Not Found");
	exit;
}

$profile_data = json_decode($redis->get("$profile_name:profile"));

function index(){
	global $redis;
	$users = array();
	foreach($redis->keys("*:profile") as $key){
		$user = explode(":", $key);
		$users[] = $user[0];
	}
	return $users;
}

function buzz(){
	global $redis;
	foreach($redis->keys("search:*") as $key){
		$term = explode(":", $key);
		$terms[$term[1]] = $redis->smembers($key);
	}
	return $terms;
}

function search($q){
	global $redis;
	$words = explode(" ", strtolower($q));
	$match_count = array();
	foreach($words as $word){
		$matches = $redis->smembers("search:$word");
		if($matches){
			foreach($matches as $match){
				if(!$match_count[$match]) $match_count[$match] = 0;
				$match_count[$match] += 1;
			}
		}
	}
	arsort($match_count);
	foreach($match_count as $k => &$v){
		$_v = null;
		$temp = explode(":", $k);
		$_v->user_id = $temp[0];
		$_v->path = $temp[1];
		$_v->hits = $v;
		$key = $_v->user_id.':cache:'.$_v->path;
		$_v->content = substr(trim(strip_tags($redis->get($key))),0,200);
		if (!$_v->content){
			$redis->srem("search:$word", "$_v->user_id:$_v->path");
			unset($match_count[$k]);
		} else $v = $_v;
	}
	return $match_count;
}

function getDataFromUrl($url, $is_markdown=true, $add_to_search=true, $path_suffix=""){
	global $redis, $profile_name, $profile_data, $get_data;
	$key = "$profile_name:cache:" . implode("/", $get_data).$path_suffix;
	if($redis->exists($key)) return $redis->get($key);
	$data = @file_get_contents($url);
	$data = trim($data);
	if(!data) return false;
	if($is_markdown) {
		$data = strip_tags($data, '<p><a><br><hr><h1><h2><h3><h4><h5><h6><abbr><cite><code><ul><ol><li><table><thead><tbody><tr><th><td>');
		$data = Markdown($data);
	}
	if($profile_data->settings->enable_search && $add_to_search) fillSearchIndex($data, $path_suffix);
	$redis->set($key, $data);
	$redis->expire($key, 86400);
	return $data;
}

function refresh($userid){
	global $redis;
	foreach($redis->keys("$userid:*") as $key) $redis->del($key);
	addProfile($redis->get("profile_url:$userid"));
}

function fillSearchIndex($full_text, $path_suffix=""){
	global $redis, $profile_name, $get_data;
	$words = explode('#', strtolower(preg_replace('/[^a-z0-9]/i', '#', str_replace("\n", ' ', $full_text))));
	foreach($words as $word){
		if($word && $word != '' && strlen($word) >= 3){
			$key = "search:$word";
			$redis->sadd($key, "$profile_name:" . implode("/", $get_data) . $path_suffix);
		}
	}
}

function addProfile($jsonurl){
	global $redis, $profile_name;
	if(!@get_headers($jsonurl)) return 404;
	if(!@json_decode(file_get_contents($jsonurl))) return 406;
	$profile = json_decode(file_get_contents($jsonurl));
	$profile_name = strtolower($profile->settings->id);
	if(!preg_match('~^[a-z0-9]*\z~i', $profile_name)) return 403;
	if($redis->exists("$profile_name:profile")) return 409;
	$redis->set("$profile_name:profile", json_encode($profile));
	$redis->set("profile_url:$profile_name", $jsonurl);
	return 200;
}


if(count($get_data) != 0){
	$content_data = $profile_data->content->{$get_data[0]};
	if(!$content_data){
		header("Status: 404 Not Found");
		exit;
	}
} else {
	if($profile_data->content && key($profile_data->content)) header('location: /' . key($profile_data->content));
	else{
		header("Status: 404 Not Found");
		exit;
	}
}

include("profile.php");

?>