psa-orderform/update-server/manifest.php

<?php

declare(strict_types=1);

require_once __DIR__ . "/includes/update-server.php";

header("Cache-Control: no-store");

$baseDir = __DIR__;
$manifestFile = $baseDir . "/manifest.json";

try {
    $manifest = updateServerReadManifest($manifestFile);
    $release = updateServerLatestRelease($manifest);
    $packagePath = updateServerPackagePath($baseDir, $release["package"]);
    $size = $release["size"] > 0 ? $release["size"] : (filesize($packagePath) ?: 0);

    updateServerJsonResponse(200, [
        "latest" => $release["version"],
        "version" => $release["version"],
        "package_url" => updateServerPackageUrl($release["version"]),
        "sha256" => $release["sha256"],
        "size" => $size,
        "published_at" => $release["published_at"],
    ]);
} catch (Throwable $exception) {
    $message = $exception->getMessage();
    $status = in_array($message, [
        "No valid latest release is configured.",
        "Latest release entry is missing.",
        "Release package is missing.",
    ], true) ? 404 : 500;

    updateServerJsonResponse($status, ["error" => $message]);
}