<?php
// Imeji Uploader Core Code -- Version 1.4 (Return Proper Error Codes Update)
// 
// Core Variables. Don't change unless you know what you're doing.
$imejicoreversion = "Imeji-Caddy_V1.4";
$target_dir = "public/";
$target_file = $target_dir . basename($_FILES["fileToUpload"]["name"]);
$target_filenameonly = basename($_FILES["fileToUpload"]["name"]);
$uploadOk = 1;
$imageFileType = pathinfo($target_file,PATHINFO_EXTENSION);
// Check if uploaded image file is a actual image or fake image with masked extension.
if(isset($_POST["submit"])) {
    $check = getimagesize($_FILES["fileToUpload"]["tmp_name"]);
    if($check !== false) {
        //echo "File is an image - " . $check["mime"] . ".";
        $uploadOk = 1;
    } else {
        //echo "File is not an image.";
        //header("HTTP/1.1 415 Unsupported Media Type");
        //header('Location: ./failed.php?error=415');
        $errCode = 415;
        $uploadOk = 0;
    }
}
// Check whether a file with the same name already exists on server or not for security reasons.
if (file_exists($target_file)) {
    //echo "Sorry, file already exists.";
    //header("HTTP/1.1 409 Conflict");
    //header('Location: ./failed.php?error=409');
    $errCode = 409;
    $uploadOk = 0;
}
// Check file size. (Imeji Standard Max is 6MB)
if ($_FILES["fileToUpload"]["size"] > 6291456) {
    //echo "Sorry, your file is too large. (Max is 6MB)";
    //header("HTTP/1.1 413 Payload Too Large");
    //header('Location: ./failed.php?error=413');
    $errCode = 413;
    $uploadOk = 0;
}
// Allow only certain file formats.
// 1.1a -- Fixed uppercase rejection bug and allows them.
if($imageFileType != "jpg" && $imageFileType != "png" && $imageFileType != "jpeg"
&& $imageFileType != "JPG" && $imageFileType != "PNG" && $imageFileType != "JPEG"
&& $imageFileType != "gif" && $imageFileType != "svg"
&& $imageFileType != "GIF" && $imageFileType != "SVG" ) {
    //echo "Sorry, only JPG, JPEG, PNG & GIF files are allowed.";
    //header("HTTP/1.1 415 Unsupported Media Type");
    //header('Location: ./failed.php?error=415');
    $errCode = 415;
    $uploadOk = 0;
}
// Check if $uploadOk is set to 0 by an error, if so go to failure condition.
if ($uploadOk == 0) {
    if (!$errCode) {
        //echo "Sorry, your file could not be uploaded.";
        header('Location: ./failed.php?error=400');
    } else {
    //echo "Sorry, your file could not be uploaded.";
    header('Location: ./failed.php?error=' . $errCode);
    }
// If everything is ok, try to upload file.
} else {
    // 1.2a --- Changed some case-confusing characters such as I and O to web safe symbols.
    // 1.3 ---- Removed some problematic symbol characters that can break CMS such as + and $.
    // 1.3_0 -- Changed the filename randomizer algorithm to compensate for characters pool reduction to 62 from 64.
    $characters = 'abcdefghjklmnpqrstuvwxyzABCDEFGHJKLMNPQRSTUVWXYZ1234567890-_!*';
    $random_string_length = 11;
    $randomFilename = '';
    for ($i = 0; $i < $random_string_length; $i++) {
      $randomFilename .= $characters[rand(0, strlen($characters) - 1)];
    }
    // Day-base identifiers (Implemented in v1.3_0)
    if (date('D') == 'Sun') {
        $dayId = 'Q';
    } else if (date('D') == 'Mon') {
        $dayId = 'a';
    } else if (date('D') == 'Tue') {
        $dayId = 'z';
    } else if (date('D') == 'Wed') {
        $dayId = '2';
    } else if (date('D') == 'Thu') {
        $dayId = 'W';
    } else if (date('D') == 'Fri') {
        $dayId = 's';
    } else if (date('D') == 'Sat') {
        $dayId = 'x';
    } else {
        $dayId = '0';
    }
    // Hour-base identifiers (Implemented in v1.3_0 / Changed in v1.3_2)
    if ((date('H') >= '00') && (date('H') <= '03')) {
        $hourId = '3';
    } else if ((date('H') >= '04') && (date('H') <= '07')) {
        $hourId = 'E';
    } else if ((date('H') >= '08') && (date('H') <= '11')) {
        $hourId = 'd';
    } else if ((date('H') >= '12') && (date('H') <= '15')) {
        $hourId = '4';
    } else if ((date('H') >= '16') && (date('H') <= '19')) {
        $hourId = 'R';
    } else if ((date('H') >= '20') && (date('H') <= '23')) {
        $hourId = 'f';
    } else {
        $hourId = 'z';
    }
    // Finalize file upload and return output to user.
    // Old line: $newfilename = $randomFilename . '.' . end(explode(".",$_FILES["fileToUpload"]["name"])); --prior to v1.3, kept for instaneous rollback safety.
    $newfilename = $dayId . $hourId . $randomFilename . '.' . end(explode(".",$_FILES["fileToUpload"]["name"]));
    $newtarget = $target_dir . $newfilename;
    if (move_uploaded_file($_FILES["fileToUpload"]["tmp_name"], $newtarget)) {
        chmod("$newtarget", 0775); // Set read and write permissions on file
        //echo "The file ". basename( $_FILES["fileToUpload"]["name"]). " has been uploaded.";
        $uploaderlog = "" . date('U') . ", ". date('Y-m-d H:i:s e') . ", $_SERVER[REMOTE_ADDR], $newfilename" . ", " . $imejicoreversion . ", $_SERVER[HTTP_USER_AGENT]";
        file_put_contents('uploads.log', $uploaderlog . PHP_EOL, FILE_APPEND);
        header('Location: https://i.yandols.xyz/' . $newfilename);
    } else {
        // If anything wrong here, go to failure condition.
        //echo "Sorry, there was a problem uploading your file.";
        // This part of code should never occur. But in case it does, redirect user to error page with code 500.
        header('Location: ./failed.php?error=500');
    }
}
?>