index.php

<?php
//header('Content-Type: text/html; charset=UTF-8');
require_once __DIR__ . '/vendor/autoload.php';
include_once __DIR__.'/php/report_bot.php';


use Monolog\Logger;
use Monolog\Handler\StreamHandler;


$log = new Logger('name');
$log->pushHandler(new StreamHandler('php://stderr', Logger::WARNING));


if (!session_id()) {
    session_start();
}

$httpClient = new \LINE\LINEBot\HTTPClient\CurlHTTPClient(getenv('LineMessageAPIChannelAccessToken'));
//    id token の取得
$client_id = getenv("CLIENT_ID");
$redirect_uri = getenv("MapURL");

$client_secret = getenv("CLIENT_SECRET");


$log->addWarning( "client_id ${client_id}");
$log->addWarning( "redirect_uri ${redirect_uri}");
$log->addWarning( "client_secret ${client_secret}");

if ( (!empty($client_id)) && (!empty($redirect_uri)) && (!empty($client_secret ))){

  $code = $_GET['code'];

  $state = $_GET['state'];

  $session_state = $_SESSION['_line_state'];
//unset($_SESSION['_line_state']);

  $log->addWarning( "session state =${session_state}");


  $log->addWarning( "state =${state}");
  if ( !isset($code) or !isset($state) or !isset($session_state) ){
    $loginm = urlencode("地図閲覧のためにはLINEアカウントのログインが必要です");
    header( "Location:login.php?message=${loginm}" );

      exit;
    }
    if ($session_state !== $state) {
        $loginm = urlencode("地図閲覧のためにはLINEアカウントのログインが必要です");
        header( "Location:login.php?message=${loginm}" ) ;

        exit;
      }


  //  認証ありの場合

  $url = "https://api.line.me/oauth2/v2.1/token";

//----------------------------------------
// POSTパラメータの作成
//----------------------------------------
  $query = "";
  $query .= "grant_type=" . urlencode("authorization_code") . "&";
  $query .= "code=" . urlencode($code) . "&";
  $query .= "redirect_uri=" . urlencode($redirect_uri) . "&";
  $query .= "client_id=" . urlencode($client_id) . "&";
  $query .= "client_secret=" . urlencode($client_secret) . "&";

  $header = array(
    "Content-Type: application/x-www-form-urlencoded",
    "Content-Length: " . strlen($query),
  );

  $context = array(
    "http" => array(
        "method"        => "POST",
        "header"        => implode("\r\n", $header),
        "content"       => $query,
        "ignore_errors" => true,
    ),
  );
  $res_json = file_get_contents($url, false, stream_context_create($context));

  $res = json_decode($res_json);

  if (isset($res->error)) {

    $loginm = urlencode("ログインエラーが発生しました。<br />" . $res->error . '<br />'.$res->error_description);
    header( "Location:login.php?message=${loginm}" );

      exit;

  }
//id_token(JWT)を分解
  $val = explode(".", $res->id_token);
  $data_json = base64_decode($val[1]);
  $data = json_decode($data_json);

//echo '$data= ';
//print_r($data);
//echo '<br /><br />';

//取得したデータを表示
//print("[sub]:[" . $data->sub . "][対象ユーザーの識別子]<br />\n");

  $uname = GetUserNameUsingID( $data->sub );

//print("[username]:[" . $uname. "][対象ユーザーの名前]<br />\n");

  if ( isset($uname )) {
    readfile(__DIR__ . '/pg/map.html');
  }
  else {
     $loginm = urlencode("情報調査LINEボットと友達になっていないと地図は閲覧できません");
     header( "Location:login.php?message=${loginm}" );
   }
}
else {   //  認証無しの場合
    readfile(__DIR__ . '/pg/map.html');
}