<?php
/*
 * Copyright 2018 Google LLC
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *   http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

/**
 * This front controller is called by the App Engine web server to handle all
 * incoming requests. To change this, you will need to modify the "entrypoint"
 * directive in `app.yaml`.
 * @see https://cloud.google.com/appengine/docs/standard/php/config/appref
 */
require 'vendor/autoload.php';

use Psr\Http\Message\ResponseInterface as Response;
use Psr\Http\Message\ServerRequestInterface as Request;
use Slim\Factory\AppFactory;

# [START gae_slim_front_controller]
$app = AppFactory::create();
$app->addRoutingMiddleware();
$app->addErrorMiddleware(true, true, true);

$app->get('/', function (Request $request, Response $response) {
    // Use the Null Coalesce Operator in PHP7
    // http://php.net/manual/en/language.operators.comparison.php#language.operators.comparison.coalesce
    $name = $request->getQueryParams()['name'] ?? 'World';
    $response->getBody()->write("Hello, $name!");
    return $response;
});
$app->run();
# [END gae_slim_front_controller]