photo-viewer-backend/php/get.php

<?php
include_once __DIR__ . "/logging.php";

define("ROOT_URL", "http://localhost/");
define("ROOT_DIR", "/var/www/localhost/");
define("IMG_DIR", "img/");
define("THUMBNAIL_DIR", __DIR__ . "../thumbnails");

main();

function main(): void {
	$data = json_decode(file_get_contents('php://input'), true);
	$array = [];

	$category = $data["category"];
	$directory = ROOT_DIR.IMG_DIR.$category;

	if (!is_dir($directory)) goto encode;
	foreach (scandir($directory) as $file) {
		if ($file === ".") continue;
		if ($category === "" && $file === "..") continue;

		if ($category != "") $file = $category.'/'.$file;
		$is_dir = is_dir(ROOT_DIR.IMG_DIR.$file);
		if (!$is_dir && !is_valid_file_type($file)) continue;

		$file_item = [];
		$file_item["is_dir"] = $is_dir;
		$file_item["url"] = ROOT_URL.IMG_DIR.$file;
		$file_item["thumbnail_url"] = create_thumbnail($file);
		array_push($array, $file_item);
	}

	encode:
	echo json_encode($array);
}

function create_thumbnail(string $file): string {
	return ROOT_URL.IMG_DIR.$file;
}

function is_valid_file_type(string $filename): bool {
	$file_extensions = [
		// Image extensions
		'jpg',
		'jpeg',
		'png',
		'gif',
		'tiff',
		'bmp',
		'webp',
		'svg',
		// Video extensions
		'mp4',
	];

	foreach ($file_extensions as $file_extension) {
		if (str_ends_with($filename, $file_extension)) return true;
	}
	return false;
}
?>