<?php
	include('db.php');
	
	$response = array(
		"status" => 0,
		"msg" => null,
		"hash" => null,
		"publichash" => null,
		"link" => null,
		"mime" => null,
		"filename" => null
	);
	
	//check input size is large enough
	$maxsizeM = ini_get('post_max_size');
	$maxsize = (int)(str_replace('M', '', $maxsizeM) * 1024 * 1024);
	$fsize = (int)$_SERVER['CONTENT_LENGTH'];
	$mime = strlen($_SERVER['CONTENT_TYPE']) > 0 ? $_SERVER['CONTENT_TYPE'] : _DEFAULT_TYPE;
	$fname = $_GET["filename"];
	
	if($fsize > $maxsize)
	{
		$response["msg"] = "File size larger than " . $maxsizeM;
	}
	else
	{
		$source = isset($_GET["remote"]) ? $_GET["remote"] : "php://input";
		
		$rawf = fopen($source, 'rb');
		
		if(isset($_GET["remote"])){
			$meta_data = stream_get_meta_data($rawf);
			foreach($meta_data["wrapper_data"] as $hd){
				if(strpos($hd, "Content-Type") === 0){
					$nt = explode(": ", $hd);
					$mime = $nt[1];
					if(strpos($mime, ";") > 0){
						$ms = explode(";", $mime);
						$mime = $ms[0];
					}
				}else if(strpos($hd, "Content-Disposition") === 0){
					$nn = explode("filename=", $hd);
					$fname = str_replace("\"", "", $nn[1]);
				}
			}
			
			if($fname == "remote"){
				//parse url if no content-disposition is set
				preg_match('@^.*\/(.*\.[a-zA-Z0-9]{0,4})@i', $_GET["remote"], $matches);
				if(count($matches) > 0){
					$fname = $matches[1];
				}
			}
		}
		
		$tmpf = fopen("php://temp", 'rb+');
		stream_copy_to_stream($rawf, $tmpf);
		rewind($tmpf);
		
		//Connect to db
		$db = new DB();
		
		//get file hash
		$hc = hash_init('sha256');
		hash_update_stream($hc, $tmpf);
		$fh = hash_final($hc);
		$response["hash"] = $fh;
		rewind($tmpf);
		
		$response["filename"] = $fname;
		
		//check for dupes
		$f_e = $db->Exists256($fh);
		if($f_e->id != 0)
		{
			//file already exists
			$response["publichash"] = $f_e->hash160;
			$response["mime"] = $f_e->mime;
		}
		else
		{
			//file does not exist
			//generate public hash
			$phc = hash_init('ripemd160');
			hash_update($phc, $fh);
			$ph = hash_final($phc);
			$response["publichash"] = $ph;

			//save to disk
			$op = _FILEPATH . $ph;
			$fo = fopen($op, 'wb+');
			stream_copy_to_stream($tmpf, $fo);
			fclose($fo);
			
			//save to db
			$f_e = new FileUpload();
			$f_e->hash160 = $ph;
			$f_e->hash256 = $fh;
			$f_e->mime = $mime;
			$f_e->path = $op;
			$f_e->filename = $fname;
			
			$db->InsertFile($f_e);

			$discord_data = array("content" => _SITEURL . $f_e->hash160 . '&v');
			include("discord.php");
		}

		//close streams
		fclose($rawf);
		fclose($tmpf);
		
		$response["status"] = 200;
		$response["link"] = _SITEURL . $f_e->hash160;
		$response["mime"] = $mime;
	}
	
	//return response
	header('Content-Type: application/json');
	echo json_encode($response);
?>