<?php
$method = $_SERVER['REQUEST_METHOD'];
$contentType = $_SERVER['CONTENT_TYPE'] ?? '';
$body = file_get_contents('php://input');

header('Content-Type: application/json');

try {
    $payload = json_decode($body, true, 512, JSON_THROW_ON_ERROR);
} catch (JsonException $e) {
    http_response_code(400);
    echo json_encode([
        'error' => 'invalid json',
        'message' => $e->getMessage(),
    ], JSON_PRETTY_PRINT | JSON_UNESCAPED_SLASHES) . PHP_EOL;
    return;
}

echo json_encode([
    'method' => $method,
    'content_type' => $contentType,
    'name' => $payload['name'] ?? null,
    'quantity' => $payload['quantity'] ?? null,
], JSON_PRETTY_PRINT | JSON_UNESCAPED_SLASHES) . PHP_EOL;