my-portfolio/dist/api/blog/blogRoutes.php

<?php

namespace api\blog;
require_once __DIR__ . "/../utils/routesInterface.php";
require_once "blogData.php";

use api\utils\routesInterface;
use Psr\Http\Message\ResponseInterface as Response;
use Psr\Http\Message\ServerRequestInterface as Request;
use Slim\App;

class blogRoutes implements routesInterface
{
    private blogData $blogData;
    /**
     * constructor used to instantiate a base blog routes, to be used in the index.php file.
     * @param App $app - the slim app used to create the routes
     */
    public function __construct(App $app)
    {
        $this->blogData = new blogData();
        $this->createRoutes($app);
    }

    /**
     * creates the routes for the blog
     * @param App $app - the slim app used to create the routes
     * @return void - returns nothing
     */
    public function createRoutes(App $app): void
    {
        $app->post("/blog/post", function (Request $request, Response $response, array $args)
        {
            $data = $request->getParsedBody();
            $files = $request->getUploadedFiles();
            if (empty($data["title"]) || empty($data["body"]) || empty($data["dateCreated"]) || empty($data["featured"]) || empty($data["categories"]) || empty($files["headerImg"]))
            {
                // uh oh sent some empty data
                $response->getBody()->write(json_encode(array("error" => "Error, empty data sent")));
                return $response->withStatus(400);
            }

            $insertedID = $this->blogData->createPost($data["title"], $data["body"], $data["dateCreated"], $data["featured"], $data["categories"], $files["headerImg"]);
            if (!is_int($insertedID))
            {
                // uh oh something went wrong
                $response->getBody()->write(json_encode(array("error" => $insertedID)));
                return $response->withStatus(500);
            }
            $response->getBody()->write(json_encode(array("ID" => $insertedID)));
            return $response->withStatus(201);
        });

        $app->post("/blog/uploadPostImage", function (Request $request, Response $response)
        {
            $files = $request->getUploadedFiles();
            if (empty($files))
            {
                // uh oh sent some empty data
                $response->getBody()->write(json_encode(array("error" => array("message" => "Error, empty data sent"))));
                return $response->withStatus(400);
            }

            $message = $this->blogData->uploadPostImage($files["upload"]);
            if (!is_array($message))
            {
                $response->getBody()->write(json_encode(array("error" => array("message" => $message))));
                return $response->withStatus(500);
            }


            $response->getBody()->write(json_encode($message));
            return $response->withStatus(201);
        });
    }
}