<?php
############################################################################
#    PHP Upload Script for ShareX v2.0
#    Copyright (C) 2013 - 2015  Richard Cornwell
#    Website: http://thegeekoftheworld.com/
#    Script:  http://thegeekoftheworld.com/php-upload-script-for-sharex-v2
#    Email:   richard@techtoknow.net
#
#    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>.
############################################################################

$key = "Changeme";
$redirect = "http://redirectdomain.tld/";
$domain = "thisdomain.tld";
$filenamelength = 4;

#Comment this next line if you want Robots to index this site.
if ($_SERVER["REQUEST_URI"] == "/robot.txt") { die("User-agent: *\nDisallow: /"); }


#Don't edit below this line inless you know what you are doing...
$urldata = explode("/", $_SERVER["REQUEST_URI"]);

function createthumb($name,$filename,$new_w,$new_h){
    $system=explode('.',$name);
    $src_img = imagecreatefromstring(file_get_contents($name));
    $old_x=imageSX($src_img);
    $old_y=imageSY($src_img);
    if ($old_x > $old_y) {
        $thumb_w=$new_w;
        $thumb_h=$old_y*($new_h/$old_x);
    }
    if ($old_x < $old_y) {
        $thumb_w=$old_x*($new_w/$old_y);
        $thumb_h=$new_h;
    }
    if ($old_x == $old_y) {
        $thumb_w=$new_w;
        $thumb_h=$new_h;
    }
    $dst_img=ImageCreateTrueColor($thumb_w,$thumb_h);
    imagecopyresampled($dst_img,$src_img,0,0,0,0,$thumb_w,$thumb_h,$old_x,$old_y);
    if (preg_match("/png/",$system[1])){
        imagepng($dst_img,$filename);
    } else {
        imagejpeg($dst_img,$filename);
    }
    imagedestroy($dst_img);
    imagedestroy($src_img);
}

if (isset($urldata[1])) {
        if($urldata[1] == "tn") {
        if(!file_exists('tn_'.$urldata[2])) {
            createthumb($urldata[2],'tn_'.$urldata[2],100,100);
        }
        header('Location: http://'.$domain.'/tn_'.$urldata[2]);
        die();
    }
}

if (isset($urldata[1])) {
    if ($urldata[1] == $key) {
    header("Content-Type: application/json");
    if($urldata[2] == "upload") {
            $target = getcwd() . "/" . basename($_FILES['d']['name']);
            if (move_uploaded_file($_FILES['d']['tmp_name'], $target)) {

            $filename = substr(str_shuffle("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"), 0, $filenamelength).".".end(explode(".", $_FILES["d"]["name"]));
            while(file_exists($filename)) { $filename = substr(str_shuffle("abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ0123456789"), 0, $filenamelength).".".end(explode(".", $_FILES["d"]["name"])); }
                rename(getcwd() . "/" . basename($_FILES['d']['name']), getcwd() . "/" . $filename);
            echo json_encode(array('filename' => $filename, 'key' => $key));
            } else {
                    echo "Sorry, there was a problem uploading your file.";
            }
    } elseif ($urldata[2] == "delete") {
        if (file_exists($urldata[3])) {
            if (isset($urldata[3])) {
                if(file_exists('tn_'.$urldata[3])) {
                    unlink('tn_'.$urldata[3]);
                }
                unlink($urldata[3]);
                echo "Your uploaded file has been deleted";
            } else { echo "Your file you want deleted does not exist"; }
        }
    }
} else {
    header('Location: '.$redirect);
}
} else {
    header('Location: '.$redirect);
}
?>