<?php
// Comment if you don't want to allow posts from other domains
header('Access-Control-Allow-Origin: *');

// Allow the following methods to access this file
header('Access-Control-Allow-Methods: OPTIONS, GET, DELETE, POST, HEAD, PATCH');

// Allow the following headers in preflight
header('Access-Control-Allow-Headers: content-type, upload-length, upload-offset, upload-name');

// Allow the following headers in response
header('Access-Control-Expose-Headers: upload-offset');

// Load our configuration for this server
require_once ('config.php');
require ("./util/upload_media.php");
require ("./util/read_write_functions.php");

if ($_SERVER['REQUEST_METHOD'] === "DELETE")
{

    $uniqueFileID = $_GET["key"];

    function revertImagesFromUploadsLocation()
    {

        global $uniqueFileID;

        $imgName = null;

        // check if there is a filename in the DB with key and campaignId
        $arrayDBStore = readJsonFile();

        $imageInfoIndex = array_search($uniqueFileID, array_column($arrayDBStore, 'id'));

        if (isset($imageInfoIndex))
        {

            $imageInfo = $arrayDBStore[$imageInfoIndex];
            $imgName = $imageInfo["name"];

        }

        // check if there is file ($imgName) in ./images/ path on the server
        $imgFilePointer = UPLOAD_DIR . $imgName;
        // if file exists --> delete file from server
        if (file_exists($imgFilePointer))
        {

            $filedeleted = unlink($imgFilePointer);

            if ($filedeleted)
            {

                // removing file from DB as well
                unset($arrayDBStore[$imageInfoIndex]);
                writeJsonFile(array_values($arrayDBStore));

            }

            return $filedeleted;

        }
        else
        {

            return true;

        }

    }

    $response = [];
    // trigger revertFunction
    if (revertImagesFromUploadsLocation())
    {

        $response["status"] = "success";
        $response["key"] = $uniqueFileID;

        http_response_code(200);

    }
    else
    {

        $response["status"] = "error";
        $response["msg"] = "File could not be deleted";

        http_response_code(400);

    }

    header('Content-Type: application/json');
    echo json_encode($response);

    exit();
}
else
{
    exit();
}

?>